JP2018130665A - Powder active carbon injection facility and powder active carbon injection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder active carbon injection technology which is easily applied to an existing water purification facility.SOLUTION: A powder active carbon injection facility 40 that crushes powdery raw material coal with a crusher 30 installed in a water purification plant to produce crushed active carbon, and supplies the crushed active carbon for water purification treatment includes: a storage tank 41 of the active carbon; a crushed product supply path 42 supplying the active carbon stored in the storage tank 41 to the crusher 30; and a crushed product return path 43 returning the crushed active carbon crushed by the crusher 30 to the storage tank, and is structured so that the active carbon stored in the storage tank 41 is supplied for water purification treatment.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a powdered activated carbon injection facility and a powdered activated carbon injection method.

  In recent years, so-called advanced water purification treatment has been adopted to treat odorous substances, trihalomethane-forming substances, anionic surfactants, ammonia nitrogen, and the like that cannot be adequately handled by ordinary water purification treatment. The advanced water purification treatment includes an ozone treatment method, an activated carbon treatment method, a biological treatment method, and the like, and these treatment methods are used alone or in combination according to the condition of the water to be treated.

  Among these, in the activated carbon treatment method, as shown in FIG. 1 to FIG. 3, the activated carbon filter basin is provided with an activated carbon filter basin that performs filtration with a granular activated carbon layer on the upstream side or downstream side of the rapid filter basin of the water purification plant. In this case, the activated carbon DC and WC are injected (added) into the raw water RW in the landing well 6 or the water conduit 5 upstream thereof. More specifically, the illustrated example is a mixing pond for adding raw water (treated water) RW such as river water supplied to the landing well (or raw water tank) 6 through the water conduit 5 and adding a flocculant or the like. 1. Based on a general water purification form purifying through a floc formation pond 2 for forming flocs, a sedimentation basin 3 for precipitating flocs, and a filtration basin 4 for filtering water with a sand layer or the like, the raw water RW Prior to supply to the mixing basin 1, powdered activated carbon DC and WC are added to the raw water RW at the injection point of the landing well 6 or the water conduit 5 upstream thereof by the powdered activated carbon injection facility 10.

  Examples of powder activated carbon injection equipment (also called powder activated carbon addition equipment) include equipment 10 using dry powder activated carbon in a dry state as shown in FIGS. 1 and 2, and wet powder containing moisture as shown in FIG. A facility 20 using activated carbon WC is known.

  In the wet powder activated carbon injection facility 20, an operator operates a crane to put wet powder activated carbon WC carried in a flexible container bag (flexible container bag) FB into a dissolution tank 21 with a stirrer, and supplies water in the dissolution tank 21. To produce a slurry of activated carbon having a predetermined concentration, and this slurry is supplied to the injection point by the injection pump 22 and mixed with the raw water RW. In this case, since the slurry is manufactured batchwise, normally, a plurality of dissolution tanks 21 are installed, and the other dissolution tanks 21 prepare for the next injection while injecting from the dissolution tanks 21 where the manufacture of the slurry is completed. A slurry will be produced. In addition, by always using a specified amount of flexible container bag FB and mixing with a specified amount of water supply SW, a slurry having a specified concentration is produced in the dissolution tank 21, and by changing the supply flow rate of the injection pump 22, The amount of activated carbon injected into the raw water RW can be controlled.

  The wet powder activated carbon injection facility 20 has the advantage that the facility is simple and the construction cost is relatively low compared with the dry powder activated carbon injection facility 10, but the flexible container bag FB is moved and put into the dissolution tank 21. In addition to the problem that a worker is required for the work and it is difficult to fully automate, there is a problem that the accuracy of the activated carbon injection has to be lowered because the activated carbon is dissolved by the flexible container bag FB. doing.

  In general, in an activated carbon injection facility, in order to reduce running costs, the activated carbon injection amount is changed according to changes in the quality of raw water to minimize the amount of activated carbon used. However, in order to respond finely to changes in the water quality of raw water, there is a limit in the wet powder activated carbon method in which manpower is indispensable and the accuracy of the activated carbon injection amount is low, and in this respect, the dry powder activated carbon method is superior.

  As shown in FIGS. 1 and 2, the dry powder activated carbon injection facility 10 stores dry powder activated carbon (raw carbon) DC that is carried in a jet pack car JC or the like in an activated carbon storage tank 11, The dry powder activated carbon DC of the activated carbon storage tank 11 is quantitatively supplied to the dissolution tank 15 with a stirrer via the supply units 12 to 14 and 18 with variable supply amounts, and the flow rate is constant from the in-situ water supply SW in the dissolution tank 15. A slurry of activated carbon having a predetermined concentration is continuously produced by mixing with dissolved water supplied separately, and slurry that overflows from the dissolution tank 15 at a constant flow rate is separately supplied from the in-site water supply SW by the pump 16 at a constant flow rate by the ejector 17. It is supplied to the injection point together with the driving water to be added to the raw water RW. In some cases, a slurry is supplied from the dissolution tank 15 to the injection point using a pump instead of the ejector 17. In addition, the code | symbol 19 of FIG. 1 has shown the flow regulating valve for supplying dissolved water to the dissolution tank 15 by constant flow. In addition, in the example of equipment shown in FIG. 1, the supply units 12 to 14 are provided with the vibration discharger 12 provided at the discharge port of the activated carbon storage tank 11 and the dry powder activated carbon DC discharged by the vibration discharger 12. It is mainly composed of a rotary valve 13 that cuts out with a cut-out amount, and a powder feed quantity variable supply device 14 that feeds dry powder activated carbon DC cut out by the rotary valve 13 into a dissolution tank 15 in a variable quantity, and the powder quantity is determined. As the feeder 14, a measuring tank reduction control method (feedback control) is adopted. This metering tank weight reduction control type powder quantification feeder 14 includes a metering tank for temporarily storing and metering dry powder activated carbon DC, a load cell for measuring the weight of the metering tank, and a dry cell in the metering tank. A cutting supply unit that cuts powdered activated carbon DC at a predetermined volume, considering the reduction of the measuring tank by the load cell as the discharge amount, and the cutting speed so that the discharge amount is constant (in the case of a rotary cutting mechanism, the number of rotations) ) Is variably controlled. As an example of the powder quantification feeder of the measuring tank weight loss control system, there can be mentioned a powder quantification feeder “Funken Auto Feeder”, etc., produced by Gakken Powtex.

  On the other hand, in the facility example shown in FIG. 2, the supply unit 18 supplies a variable amount of powder to the dry powder activated carbon DC stored in the activated carbon storage tank 11 with a predetermined cutout amount and supplies it to the dissolution tank 15. It is mainly composed of only 18 and a cut-out weight control type is adopted as the powder fixed quantity feeder 18. The cut-out weight control type powder quantitative supply machine 18 includes a cut-out unit that cuts dry powder activated carbon DC into a predetermined volume, and a weighing scale side unit that measures the weight of the cut-out predetermined volume of dry powder activated carbon DC, The actual supply amount of dry powder activated carbon DC is calculated based on the weight measurement result and the cutting speed (rotation speed in the case of a rotary cutting mechanism), and the cutting speed is variably controlled so that this actual supply amount becomes the set supply amount. To do. As an example of the cut-out weight control type powder quantitative supply device 18, there can be mentioned a cell supply checker “cell in checker” built in a load cell. The above-mentioned metering-quantity feeder 14 of the weighing tank reduction control method is likely to have a large supply accuracy error due to disturbance effects (vibrations caused by wind and human walking) when the supply amount is small (when the cut-out amount per hour is small). On the other hand, the cut-out weight control type powder quantitative supply machine 18 is not affected by disturbances, so that the supply accuracy is high and the disturbance countermeasure cost can be reduced, and the vibration ejector 12 and rotary valve in the weighing tank weight reduction control type. 13 and the metering tank of the powder fixed amount supply device 14 are unnecessary, which is advantageous in terms of reducing the equipment cost and suppressing the equipment installation height.

  The facility example 10 shown in FIGS. 1 and 2 is easier to fully automate than the wet powder activated carbon injection facility, and since the activated carbon supply to the dissolution tank 15 is performed by the quantitative feeders 14 and 18, the accuracy of the activated carbon injection amount is high. It is high, and the responsiveness of changing the injection amount is fast, so that it is suitable for finer control and is suitable for emergency response.

  In powder activated carbon injection, it is known to use fine activated carbon having a D50 of about 0.01 to 10 μm for the purpose of improving adsorption performance and reducing activated carbon consumption, thereby becoming a raw material. It is also known that powdered activated carbon (hereinafter also referred to as raw coal) is injected on-site, that is, after being pulverized by a pulverizer at a water purification plant into fine pulverized activated carbon (see Patent Documents 1 to 4).

  However, the conventional activated carbon injection by on-site pulverization involves injecting the pulverized activated carbon discharged from the pulverizer as it is, and it is difficult to ensure the installation space of the pulverizer and the interlocking with the basic equipment. However, it was difficult to apply to existing water purification equipment.

JP-A-10-309567 Japanese Patent No. 4468895 JP2013-233486A Japanese Patent Laid-Open No. 2006-036803

  Then, the main subject of this invention is providing the powder activated carbon injection | pouring technique with easy application with respect to the existing water purification plant.

<First aspect>
In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
An activated carbon reservoir,
The pulverized product supply path for supplying the activated carbon stored in the storage tank to the pulverizer,
Including a pulverized product return path for returning the pulverized activated carbon pulverized by the pulverizer to the storage tank;
The activated carbon stored in the storage tank is configured to supply the purified water treatment.
Powder activated carbon injection equipment characterized by that.

(Function and effect)
Instead of interposing a pulverizer in the path for supplying water to the water purification treatment from the storage tank as in this embodiment, the activated carbon constitutes a circulation path for circulating the storage tank and the pulverizer, and pulverizes the circulating activated carbon. By adopting a configuration in which the pulverized activated carbon is supplied from the storage tank to the water purification treatment, the crusher can be installed separately from the supply system for the storage tank and the water purification treatment. It will be easy to secure the installation space of the machine and interlock with the basic equipment, and it will be easy to apply to existing equipment. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This aspect is suitable for the case where on-site pulverization is added to an existing facility having only one activated carbon storage tank without adding the storage tank. In particular, since the pulverized activated carbon is supplied to the water purification process from the storage tank constituting the pulverization circulation system, not only the pulverization and the injection are repeated, but also simultaneously as necessary.

<Second aspect>
Having a dissolution tank for continuously producing a slurry of activated carbon having a predetermined concentration by mixing the pulverized activated carbon and separately dissolved water supplied at a constant flow rate;
Having an injectable product quantitative supply machine for continuously supplying the activated carbon stored in the storage tank to the dissolution tank;
The slurry continuously produced in the dissolution tank is configured to supply to the water purification treatment,
In the pulverized product supply path or pulverized product return path, it has a particle size measuring device for measuring the representative particle size of activated carbon,
In accordance with the increase or decrease of the particle size representative value measured by the particle size measuring device, it has a control device that increases or decreases the supply amount of the infusion product quantitative supply machine,
The powdered activated carbon injection equipment of a 1st aspect.

(Function and effect)
As described above, according to the first aspect, when injection is necessary before pulverization to the target particle size is completed, pulverization and injection can be performed simultaneously. However, in that case, since the injection is performed in a state where the pulverization is insufficient, the adsorption performance is reduced as compared with the case where the pulverized activated carbon having the target particle size is injected. In other words, the amount of pulverized activated carbon injected is insufficient. Therefore, as in the case of the second aspect, a control device is provided for increasing or decreasing the supply amount of the infusion product quantitative supply machine according to the increase or decrease of the representative particle size measured by the particle size measuring device, and the pulverized activated carbon having the target particle size is injected. It is desirable to correct the injection amount of the pulverized activated carbon so that the same adsorption performance as that obtained can be obtained.

<Third Aspect>
Part or all of the path from the storage tank to the pulverizer and part or all of the pulverized product return path in the pulverized product supply path transfer activated carbon by pneumatic transportation. Or the powdered activated carbon injection | pouring equipment of 2 aspect.

(Function and effect)
Since the activated carbon is transferred by pneumatic transportation as in this embodiment, the pulverizer can be installed far away from the supply system for the storage tank and the water purification treatment, which is preferable.

<Fourth aspect>
In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
To-be-ground product storage tank for storing to-be-ground activated carbon,
An infusion storage tank for storing pulverized activated carbon pulverized to a target particle size;
A pulverized product supply path for supplying the pulverized activated carbon stored in the pulverized product storage tank to the pulverizer,
The pulverized activated carbon pulverized by the pulverizer includes a pulverized product return path for selectively returning the pulverized activated carbon storage tank or the injected product storage tank,
The pulverized activated carbon stored in the infusion product storage tank is configured to supply the purified water treatment.
Powder activated carbon injection equipment characterized by that.

(Function and effect)
Instead of interposing a pulverizer in the path for supplying water to the water purification treatment from the storage tank as in this aspect, the activated carbon constitutes a circulation path for circulating the article storage tank and the pulverizer, and the circulated activated carbon By adopting a configuration in which pulverized activated carbon pulverized to the target particle size is stored in the injected product storage tank and pulverized activated carbon can be supplied to the water purification treatment from this injected product storage tank. Since the crusher can be installed separately from the storage system for the storage tank and water purification treatment, it is easy to secure the installation space of the crusher and interlock with the basic equipment, making it easy to apply to existing equipment. Become. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This aspect is suitable when adding on-site crushing to an existing facility having only one activated carbon storage tank (an additional storage tank is required) or an existing facility having a plurality of storage tanks. In particular, since the pulverized product storage tank and the injected product storage tank are provided separately, and the pulverization system and the injection system are independent, pulverization and injection can be performed simultaneously, and the injection amount is pulverized. As long as the amount is not exceeded, the pulverized activated carbon having the target particle size can be manufactured and injected substantially continuously, so that the shortage of injection products and the reduction in adsorption performance are unlikely to occur.

<Fifth aspect>
The powder activated carbon injection facility according to the fourth aspect, wherein a part or all of the pulverized product supply path and a part or all of the pulverized product return path transfer activated carbon by pneumatic transportation.

(Function and effect)
Since the activated carbon is transferred by pneumatic transportation as in this embodiment, the pulverizer can be installed far away from the supply system for the storage tank and the water purification treatment, which is preferable.

<Sixth aspect>
In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
A first storage tank for storing activated carbon;
A first pulverized product supply path for supplying the activated carbon stored in the first storage tank to the pulverizer;
A second storage tank for storing activated carbon;
A second pulverized product supply path for supplying activated carbon stored in the second storage tank to the pulverizer;
Pulverized activated carbon pulverized by the pulverizer, including a pulverized product return path for selectively returning the pulverized activated carbon to the first storage tank or the second storage tank,
Activated carbon stored in the first storage tank, or activated carbon stored in the second storage tank is configured to selectively supply the purified water treatment.
Powder activated carbon injection equipment characterized by that.

(Function and effect)
As in this embodiment, the pulverizer is not interposed in the path for supplying water from the storage tank to the water purification treatment, but the circulation path through which the activated carbon circulates the first storage tank and the pulverizer, and the activated carbon is the second storage tank and A circulation path that circulates through the pulverizer, and a configuration in which pulverization can be repeatedly performed on each activated carbon, and the pulverized activated carbon is selectively supplied from the first storage tank or the second storage tank to the water purification treatment. By adopting the configuration, the crusher can be installed separately from the storage system for the storage tank and water purification treatment, so it is easy to secure the installation space of the crusher and interlock with the basic equipment. Application to is easy. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This aspect is suitable when adding on-site crushing to an existing facility having only one activated carbon storage tank (an additional storage tank is required) or an existing facility having a plurality of storage tanks. In particular, since two systems of activated carbon circulation paths for pulverization are provided independently, pulverization and injection can be performed simultaneously by using one for pulverization and the other for injection. As long as the amount does not exceed the pulverization amount, pulverized activated carbon having the target particle size can be manufactured and injected substantially continuously, so that the shortage of injection products and the reduction in adsorption performance are unlikely to occur. Furthermore, although two circulation paths of activated carbon for pulverization are required, since only one pulverizer is required, there is an advantage that a small installation space is required for the equipment configuration.

<Seventh aspect>
Part or all of the first pulverized product supply path, part or all of the first pulverized product 2 supply path, and part or all of the pulverized product return path transfer activated carbon by pneumatic transportation. A powdered activated carbon injection facility according to a sixth aspect.

(Function and effect)
Since the activated carbon is transferred by pneumatic transportation as in this embodiment, the pulverizer can be installed far away from the supply system for the storage tank and the water purification treatment, which is preferable.

<Eighth aspect>
In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
Activated carbon stored in an activated carbon storage tank is supplied to the pulverizer,
Return the pulverized activated carbon crushed by the pulverizer to the storage tank,
Supplying activated carbon stored in the storage tank to the water purification treatment,
A method for injecting powdered activated carbon.

(Function and effect)
The same effects as those of the first aspect can be achieved.

<Ninth aspect>
In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
Supplying activated carbon to be crushed stored in a pulverized product storage tank for storing activated carbon to be crushed, to the pulverizer;
The pulverized activated carbon that does not reach the target particle size pulverized by the pulverizer is returned to the pulverized product storage tank,
Supplying the pulverized activated carbon that has reached the target particle size pulverized by the pulverizer, to the injection storage tank,
Supply the pulverized activated carbon stored in the infusion product storage tank to the water purification treatment,
A method for injecting powdered activated carbon.

(Function and effect)
The same effect as the 4th mode is produced.
<Tenth aspect>
In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
While selectively supplying activated carbon stored in one of the first storage tank and the second storage tank to the pulverizer,
Return the pulverized activated carbon crushed by the pulverizer to the one storage tank,
Selectively supplying activated carbon stored in the other storage tank of the first storage tank and the second storage tank to the water purification treatment;
A method for injecting powdered activated carbon.

(Function and effect)
The same effects as the sixth aspect are achieved.

  As described above, according to the present invention, there are advantages such as a powdered activated carbon injection technique that can be easily applied to existing water purification facilities.

It is a flowchart of the conventional dry powder activated carbon utilization water purification processing equipment. It is a flowchart of the conventional dry powder activated carbon utilization water purification processing equipment. It is a flowchart of the conventional water purification equipment using wet powder activated carbon. It is a flowchart of an on-site grinding | pulverization process. It is a graph which shows the relationship between D50 ratio and grinding | pulverization energy. It is a flowchart of the dry powder activated carbon injection equipment of Example 1. It is a flowchart of a grinding | pulverization driving | operation. It is a flowchart of injection | pouring driving | operation. 6 is a flowchart of the dry powder activated carbon injection facility of Example 2. FIG. 6 is a flowchart of the dry powder activated carbon injection facility of Example 3. FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
<Example of grinding control>
FIG. 4 schematically shows an on-site pulverization process for producing pulverized activated carbon having a stable particle size regardless of changes in the particle size of the raw coal. The activated carbon C1 to be crushed, such as raw coal, is supplied to the pulverizer 30, and the pulverized activated carbon C2 pulverized by the pulverizer 30 is supplied directly or indirectly to the water purification treatment, and again as the pulverized activated carbon C1. It may be returned to 30 and circulated and ground.

  As the pulverizer 30, a pulverizer that continuously pulverizes and that has a correlation between the ratio of the representative particle size of the activated carbon before and after pulverization and the pulverization energy required for pulverizing the unit processing amount is used. As such a pulverizer 30, a wet pulverizer can be used. However, since it is difficult to stably obtain a sharp particle size distribution, it is possible to obtain a sharp particle size distribution by a single pulverization process. A dry pulverizer such as a jet mill is preferable, and a dry bead mill is particularly preferable.

  FIG. 5 shows the relationship between the ratio of the D50 of the activated carbon after pulverization to the D50 of the activated carbon before pulverization in the dry bead mill and the pulverization energy required for pulverizing the unit throughput. It can be seen that there is a good correlation between the ratio of the representative particle size of the activated carbon before and after pulverization and the pulverization energy required for pulverizing the unit throughput.

  The particle size representative value is D50 (median value. As is well known, it means a particle size corresponding to 50% cumulative from the smaller diameter side of the cumulative volume distribution in the particle size distribution, and is generally referred to as an average particle size. (Meaning the particle size measured by the laser diffraction scattering method) is preferable, but in addition to the mode value and the arithmetic average value (number average, length average, area average, or volume average), D10 and D90 You can also

  Further, the activated carbon C1 to be crushed to the pulverizer 30 is supplied by a pulverizer quantitative supply device 31 that can perform continuous quantitative supply. As the pulverizer constant supply device 31, known ones such as the above-described measuring tank weight reduction control method and the cut-out weight control method can be used without particular limitation. The pulverizer quantitative supply device 31 may be provided in the pulverizer 30 or may be provided separately from the pulverizer 30.

  Characteristically, a particle size measuring device 32 that measures the particle size representative value of the activated carbon C1 to be crushed is provided, and the target particle size measured by the particle size measuring device 32 with respect to the target particle size representative value (the target particle size representative value). Based on the ratio of the representative particle size of the pulverized activated carbon C1 and the above-described correlation, an appropriate pulverization energy value is obtained, and a control device 33 that performs drive control of the drive source of the pulverizer 30 so as to perform pulverization with the appropriate pulverization energy value is provided. Provide. When the activated carbon C1 to be crushed is a dry powder, a commercially available in-line dry particle size sensor (particle size distribution measuring device) can be used as the particle size measuring device 32, and a known control device such as a sequence controller can be used as the control device 33. 33 can be used.

  In order to perform drive control of the drive source of the pulverizer 30 so that the pulverization energy is appropriate, the actual pulverization energy measurement value of the pulverizer 30 at that time is obtained, and the drive source is, for example, a motor so that the difference is eliminated. In this case, the rotational speed of the motor is increased or decreased. When the pulverizer 30 is electrically powered, the actual pulverization energy value is a value obtained by dividing the power consumption (instantaneous value) of the pulverizer 30 by the supply mass per unit time of the pulverizer constant supply device 31. Corresponds to the power consumption per unit mass of activated carbon. The supply mass per unit time of the pulverizer quantitative feeder 31 is fixed, and when the pulverizer quantitative feeder 31 has a measurement function, the measurement result can be used.

  By such control by the control device 33, even if the particle size of the raw coal changes, pulverized activated carbon having the target particle size can be stably produced and injected, and excessive or insufficient use of activated carbon can be prevented. The measurement by the particle size measuring device 32 and the drive control of the pulverizer 30 may be performed intermittently with an appropriate time interval or continuously.

<Example 1 of activated carbon injection equipment>
FIG. 6 shows a dry powder activated carbon injection facility 40. The equipment 40 includes an activated carbon storage tank 41, a pulverized product supply path 42 that supplies activated carbon stored in the storage tank 41 as pulverized activated carbon to the pulverizer 30, and pulverized by the pulverizer 30. The pulverized product return path 43 for returning the activated carbon to the storage tank 41 and the activated carbon stored in the storage tank 41 can be supplied to the injection point AP of the water purification treatment.

  If it demonstrates in detail about the form of illustration, in the storage tank 41, the dry powder raw coal carried in by the jet pack car JC etc. will be supplied via the raw coal supply piping 41i, and will be stored. The raw coal stored in the storage tank 41 is cut out via the damper 41d and the storage tank rotary valve 41r and supplied to the distribution fixed quantity supply unit 44. The distribution quantitative supply unit 44 can distribute and supply two systems (including selective supply to either one) and can supply a fixed quantity to each system. In the illustrated embodiment, a hopper 44h and a first fixed supply unit 44a and a second fixed supply unit 44b for independently and quantitatively cutting the activated carbon in the hopper 44h are provided. The part from the 1st fixed supply part 44a to the grinder in the to-be-ground product supply path 42 is comprised by the pneumatic transport equipment in the illustration form. That is, the activated carbon supplied from the first fixed supply unit 44a is supplied to the supply ejector 45e via the supply rotary valve 45r, and is installed near the crusher 30 by the air supplied from the supply blower 45f. After being supplied to the receiving tank 45t and temporarily stored, it is cut out by the pulverizer quantitative supply device 31 and supplied to the pulverizer 30 in a fixed amount.

  In the illustrated embodiment, the pulverized product return path 43 from the pulverizer 30 to the activated carbon storage tank 41 is also constituted by pneumatic transportation equipment. That is, the pulverized activated carbon pulverized by the pulverizer 30 is supplied from the pulverizer 30 to the hopper 46h, then cut out by the return rotary valve 46r, supplied to the return ejector 46e, and supplied from the return blower 46f. The air is returned to the storage tank 41 via the return pipe 46p. The return pipe 46p of the present facility example 40 is joined to the raw coal supply pipe 41i, and on-off valves v1 and v2 are provided on the upstream side of the junction point, and the on-off valves v1 and v2 are selectively connected. By opening and closing, supply of raw coal to the storage tank 41 and return of pulverized activated carbon can be selected.

  The activated carbon cut out by the second fixed amount supply unit 44b of the distribution fixed amount supply unit 44 is supplied in a fixed amount to a dissolution tank 47 with a stirrer, and dissolved water and dissolution tank 47 separately supplied at a constant flow rate from the in-situ water supply SW by an injection pump 47p. A slurry of activated carbon having a predetermined concentration is continuously produced by mixing in the reactor, and a slurry that overflows from the dissolution tank 47 at a constant flow rate is supplied to the injection ejector 47e, and is separately supplied from the on-site water supply SW at a constant flow rate by the injection pump 47p. It is supplied to the injection point AP together with the driving water. A method of supplying activated carbon stored in the storage tank 41 to the water purification process, such as supplying slurry from the dissolution tank 47 to the injection point AP using a pump instead of the injection ejector 47e, is not particularly limited. Absent.

  The storage tank 41 and the receiving tank 45t are preferably provided with a bag filter bg for venting air and a cooling air purge pg for cooling activated carbon as shown in the figure.

  In the case where the pulverizer 30 can be installed in the vicinity of the dispensing fixed quantity supply device 44 or in the vicinity of the storage tank 41, the pneumatic transportation facility is provided for at least one of the pulverized product supply path 42 and the pulverized product return path 43. It can be omitted and connected directly, or other mechanical transfer equipment can be used. For example, when the pulverizer 30 can be installed in the vicinity of the distribution quantitative supply device 44, the pneumatic transportation equipment (from the supply rotary valve 45r to the receiving tank 45t) and the pulverizer quantitative supply device 31 in the pulverized product supply path 42 are omitted. The first constant supply unit 44a may supply the pulverizer 30 directly (in other words, the first constant supply unit 44a may also serve as the pulverizer fixed supply unit 31).

  In the illustrated embodiment, the particle size measuring device 32 is provided in the pulverized product supply path 42 in order to perform the above-described pulverizer drive control, and the measurement result is transmitted to the control device 33. As indicated by the dotted line, power is transmitted from the pulverizer 30 to the control device 33, and the supply amount (supply mass per unit time) is supplied from the pulverizer quantitative supply device 31 as necessary. The control device 33 transmits a control signal for the pulverization drive source to the pulverizer 30.

  7 and 8 show an example of an operation flow of the activated carbon injection facility 40 described above. Now, when the crushing operation is started from the initial state where the raw coal is stored in the storage tank 41, the return air transport equipment (return fan 45f, the return rotary valve 45r), the crush equipment (for the crusher 30 and the crusher) The fixed amount feeder 31) starts operation in this order. These operations are stopped when the storage level of the receiving tank 45t is equal to or lower than a predetermined low level (LL), but are continued unless the storage level is low. The storage level of the receiving tank 45t can be measured by a known measuring device such as measuring the weight of the receiving tank 45t with a load cell.

  On the other hand, with the start of the pulverization operation, if the storage level of the receiving tank 45t is LL or less, the storage tank rotary valve 41r, the supply air transport equipment (supply fan 45f, supply rotary valve 45r), and the first fixed amount The supply unit 44a starts operation, and these operations are stopped when the storage level of the receiving tank 45t becomes equal to or higher than a predetermined high level (HL), but are continued as long as the level does not become high level. When the storage level of the receiving tank 45t exceeds LL, as described above, the pulverization facility and the return air transport facility start operation, and the activated carbon cut out from the storage tank 41 is the first fixed supply unit 44a, the supply air transport facility. Are sequentially supplied to the receiving tank 45t, and supplied to the pulverizer 30 from the receiving tank 45t, and the pulverized activated carbon discharged from the pulverizer 30 is returned to the storage tank 41 by the return air facility.

  On the other hand, in order to perform the above-described pulverization drive control, the controller 33 monitors whether or not the first fixed amount supply unit 44a is in operation with the start of the pulverization operation, and the first fixed amount supply unit 44a is in operation. Is measured by the particle size measuring device 32, and the actual pulverization energy measurement value of the pulverizer 30 is obtained, and the drive control of the drive source of the pulverizer 30 is performed so that the actual pulverization energy measurement value becomes the appropriate pulverization energy value. (If the drive source is a motor, increase or decrease the rotational speed of the motor). In addition, since an appropriate value of pulverization energy cannot be obtained at the initial stage of operation, drive control of the drive source of the pulverizer 30 is performed so that the initial setting value and the appropriate value of pulverization energy at the previous operation are obtained.

  The grinding operation is continued until the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 becomes the target particle size representative value. When the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 reaches the target particle size representative value, the pulverization operation is stopped. At this time, the pulverized activated carbon having the target particle size representative value is stored in the storage tank 41.

  When the activated carbon is injected in the water purification treatment, as shown in FIG. 8, the operation of the injection pump 46p is started, the dissolved water is supplied to the dissolution tank 47, and the driving water is supplied to the injection ejector 47e. The operation of 41r and the second constant supply unit 44b is started, and the pulverized activated carbon stored in the storage tank 41 is cut out and supplied to the dissolution tank 47 in a fixed amount. In the dissolution tank 47, activated carbon slurry having a predetermined concentration is produced, and this activated carbon slurry is supplied to the injection point.

  Rather than interposing the pulverizer 30 in the path for supplying water to the water purification process from the storage tank 41 as in the present equipment 40, a circulation path through which the activated carbon circulates the storage tank 41 and the pulverizer 30 is configured and circulated. When the activated carbon is configured to be repeatedly pulverized and the configuration in which the pulverized activated carbon is supplied from the storage tank 41 to the purified water treatment, the pulverizer 30 is installed separately from the storage tank 41 and the supply system for the purified water treatment. Therefore, it is easy to secure the installation space of the pulverizer 30 and the interlocking with the basic equipment, and the application to the existing equipment becomes easy. In particular, as in this example, it is preferable to transfer activated carbon by pneumatic transportation because the pulverizer 30 can be installed far away from the storage system 41 and the supply system for water purification treatment. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This facility 40 is suitable for the case where on-site pulverization is added to an existing facility having only one activated carbon storage tank without adding a storage tank. In particular, when the pulverized activated carbon is supplied from the storage tank 41 constituting the pulverization circulation system to the water purification treatment, not only the pulverization and the injection are repeated, but also simultaneously as necessary.

  On the other hand, the activated carbon injection facility 40 can perform the pulverization and the injection simultaneously when the injection is required before the pulverization to the target particle size is completed. However, in that case, since the injection is performed in a state where the pulverization is insufficient, the adsorption performance is reduced as compared with the case where the pulverized activated carbon having the target particle size is injected. In other words, the amount of pulverized activated carbon injected is insufficient. Therefore, according to the increase / decrease of the representative particle size measured by the particle size measuring device 32, the control device 33 increases / decreases the supply amount of the second constant supply unit 44a, which is equivalent to the case where the pulverized activated carbon having the target particle size is injected. It is desirable to correct the injection amount of the pulverized activated carbon so that the adsorption performance can be obtained.

  Such control can be performed, for example, according to the flow shown in FIG. That is, with the start of the injection operation, the controller 33 monitors whether or not the first fixed amount supply unit 44a is in operation, and when the first fixed amount supply unit 44a is in operation, the crushing operation is in progress. The correction required injection amount is calculated, and the supply amount of the second fixed amount supply unit 44b is increased or decreased so that the difference between the calculation result and the supply amount of the second fixed amount supply unit 44b is eliminated. When the first constant supply unit 44a is not in operation, there is no difference between the predetermined reference injection amount (necessary injection amount when the pulverized activated carbon of the target D50 is used) and the supply amount of the second constant supply unit 44b. In addition, the supply amount of the second constant supply unit 44b is increased or decreased.

The correction required injection amount may be determined as appropriate, but can be determined as follows, for example. That is, the particle size representative value is D50, and the degree of pulverization of the activated carbon to be crushed from the raw coal to the target is determined by the powder having a particle size equal to the D50 of the raw coal and the particle size equal to the target D50. When expressed in a mixing ratio with the powder, the following formula is obtained.
(Mixing ratio X)
Activated carbon D50 = target D50 x X% + initial coking coal D50 x (100-X%)
Further, assuming that the adsorption performance of the pulverized activated carbon pulverized to the target D50 when the adsorption performance of the initial raw coal is 1, the performance magnification is expressed by the following equation. Here, the adsorption performance coefficient α is obtained by conducting an adsorption performance test of the initial raw coal and pulverized activated carbon with respect to a predetermined adsorption target substance. It is expressed as a ratio. When obtaining the adsorption performance coefficient α, as long as the same adsorption performance test is performed on both the initial raw coal and the pulverized activated carbon, the type and test method of the adsorption target substance are not particularly limited. It is preferable to use a general adsorption performance value (for example, 2-MIB value, phenol value, ABS value, methylene blue decolorizing power) as a performance index. The test method for obtaining these adsorption performance values may be an original method or a standardized method. As an example of the latter, the test method described in JWWA K113: 2005 which is the Japan Water Works Association standard regarding the powder activated carbon for water supply can be illustrated. When the adsorption performance value is such that the smaller the value is, such as the 2-MIB value, the adsorption performance coefficient α is calculated with the reciprocal as the adsorption performance value.
(Performance magnification)
Performance magnification = α × X% + 1.0 × (100 – X%)
Therefore, the corrected injection amount corrected with the performance magnification taken into account can be calculated by the following equation.
(Injection amount Y after correction)
Y = reference injection amount ÷ performance magnification

  In this equipment 40, as the pulverizer 30, a dry pulverizer such as a dry bead mill and a jet mill is preferable, and among them, a dry bead mill is particularly preferable in that a sharp particle size distribution can be obtained by a single pulverization treatment. In addition, as various quantitative feeders and quantitative feeders including the pulverizer quantitative feeder 31, known ones such as the above-described measuring tank weight loss control method and the cut-out weight control method can be used without particular limitation. it can.

<Example 2 of activated carbon injection equipment>
FIG. 9 shows another dry powder activated carbon injection facility 50. The equipment 50 includes a pulverized product storage tank 51 for storing pulverized activated carbon, an injection product storage tank 54 for storing pulverized activated carbon pulverized to a target particle size, and a pulverized activated carbon stored in the pulverized product storage tank 51. The pulverized activated carbon pulverized by the pulverizer 30 and the pulverized activated carbon pulverized by the pulverizer 30 are selectively returned to the pulverized product storage tank 51 or the injected product storage tank 54. The pulverized activated carbon stored in the injected product storage tank 54 is supplied to the purified water treatment including the product return path 53.

  The illustrated embodiment will be described in more detail. In the pulverized product storage tank 51, dry powder raw coal fed by a jet pack car JC or the like is supplied and stored via the raw coal supply pipe 51i. In the illustrated embodiment, the dry powder raw coal fed by the jet pack vehicle JC or the like can be supplied to the injected product storage tank 54 via the raw coal supply pipe 54i. It is good also as a structure which supplies raw coal only to the storage tank 51. FIG. Coking coal stored in the pulverized product storage tank 51 is cut out via a damper 51d and a supply rotary valve 55r, supplied to a supply ejector 55e, and pulverized by air supplied from a supply blower 55f. After being supplied to a receiving tank 55t installed in the vicinity of 30 and temporarily stored, it is cut out by the pulverizer quantitative supply device 31 and supplied to the pulverizer 30 in a fixed amount.

  In the illustrated embodiment, the pulverized product return path 53 extending from the pulverizer 30 to the pulverized product storage tank 51 and the injected product storage tank 54 is also constituted by pneumatic transportation equipment. That is, the pulverized activated carbon discharged from the pulverizer 30 is supplied to the hopper 56h, then cut out by the return rotary valve 56r, supplied to the return ejector 56e, and returned by the air supplied from the return blower 56f. It is selectively returned to the pulverized product storage tank 51 or the injected product storage tank 54 via the pipe 56p. The return pipe 56p of the present facility 50 branches from the common part on the ejector side to the two paths from this common part, one of which is connected to the pulverized product storage tank 51 and the other connected to the injected product storage tank 54. And an opening / closing valve v2 is provided on the downstream side of the branch point. By selectively opening / closing the opening / closing valve v2, either the crushed product storage tank 51 or the injected product storage tank 54 is provided. It can only be selected and supplied. In addition, the return pipe 56p of this facility example 50 is joined to the raw coal supply pipes 51i and 54i, and on-off valves v1 and v2 are provided on the upstream side from the junction point, and the on-off valves v1 and v2 are selected. By opening and closing automatically, supply of raw coal to the storage tanks 51 and 54 and return of pulverized activated carbon can be selected.

  The pulverized activated carbon stored in the infusion product storage tank 51 is cut out via the damper 54d and the infusion product rotary valve 54r and supplied to the injecting quantitative feeder 54f, and the activated carbon to be cut out by the injecting quantitative feeder 54f is A fixed amount of activated carbon slurry is continuously supplied to the dissolution tank 57 with a stirrer and mixed with the dissolution water separately supplied at a constant flow rate from the on-site feed water SW in the dissolution tank 57. The slurry that overflows at a constant flow rate from 57 to the injection ejector 57e is supplied to the injection ejector 57e, and is supplied to the injection point AP together with the drive water supplied separately at a constant flow rate from the in-situ water supply SW by the injection pump 57p. . A method for supplying activated carbon stored in the injection storage tank 54 to the purified water treatment such as supplying slurry from the dissolution tank 57 to the injection point AP using a pump instead of the injection ejector 57e is particularly limited. It is not a thing.

  When the pulverizer 30 can be installed in the vicinity of the pulverized product storage tank 51, at least one of the pulverized product supply path 52 and the pulverized product supply path 53 may be directly connected by omitting the air transportation facility, Other mechanical transfer equipment can be used. For example, the pneumatic transportation equipment (from the supply ejector 55e to the receiving tank 55t) in the pulverized product supply path 52 is omitted, and the activated carbon cut out from the pulverized product storage tank 51 is directly supplied to the pulverizer quantitative supply device 31; It can also be set as the structure supplied to the grinder 30. FIG.

  In the illustrated embodiment, the particle size measuring device 32 is provided in the pulverized product supply path 52 in order to perform the above-described drive control of the pulverizer 30, and the measurement result is transmitted to the control device 33. . As indicated by the dotted line, power is transmitted from the pulverizer 30 to the control device 33, and the supply amount (supply mass per unit time) is supplied from the pulverizer quantitative supply device 31 as necessary. The control device 33 transmits a control signal for the pulverization drive source to the pulverizer 30.

  The activated carbon injection facility described above can be operated as follows. That is, when the pulverization operation is started from the initial state where the raw coal is stored in the pulverized product storage tank 51, the return air transport facility (return fan 56f, the return rotary valve 56r), the pulverization facility (pulverizer 3). The pulverizer quantitative feeder 31) starts operation in this order. These operations are stopped when the storage level of the receiving tank 55t is equal to or lower than a predetermined low level (LL), but are continued unless the storage level is low. The

  On the other hand, when the storage level of the receiving tank 55t is LL or less with the start of the pulverization operation, the supply air transport equipment (supply fan 55f, supply rotary valve 55r) starts operation, and these operations are received. When the storage level of the tank 55t becomes equal to or higher than a predetermined high level (HL), the tank 55t is stopped. When the storage level of the receiving tank 55t exceeds LL, as described above, the pulverization facility and the return air transport facility start operation, and the activated carbon cut out from the pulverized product storage tank 51 is received via the supply air transport facility. While being sequentially supplied to the tank 55t, the pulverized activated carbon supplied from the receiving tank 55t to the pulverizer 30 and discharged from the pulverizer is returned to the pulverized product storage tank 51 by the return air equipment.

  The grinding operation is continued until the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 becomes the target particle size representative value. When the representative particle size of the activated carbon measured by the particle size measuring device 32 reaches the target particle size representative value (or the predetermined particle size representative value that reaches the target particle size representative value in one pulverization), the return pipe 56p By switching the on-off valve v2, the pulverized activated carbon discharged from the pulverizer 30 is returned to the injected product storage tank 54 by the return air equipment. As a result, the pulverized activated carbon having the target particle size representative value is stored in the injected product storage tank 54.

  When the activated carbon is injected in the water purification treatment, the operation of the injection pump 56p is started, the dissolved water is supplied to the dissolution tank 57, and the driving water is supplied to the injection ejector 57e, and the injection product rotary valve 54r and the injection quantitative feeder The operation of 54 f is started, and the pulverized activated carbon stored in the injected product storage tank 54 is cut out and supplied to the dissolution tank 57 in a fixed amount. In the dissolution tank 57, activated carbon slurry having a predetermined concentration is manufactured, and this activated carbon slurry is supplied to the injection point AP.

  Instead of interposing the pulverizer 30 in the path for supplying the purified water from the injected product storage tank 54 as in the present facility 50, a circulation path through which the activated carbon circulates the pulverized product storage tank 51 and the pulverizer 30 is provided. The pulverized activated carbon pulverized to the target particle size is stored in the injected product storage tank 54, and the pulverized activated carbon is supplied from the injected product storage tank 54 to the purified water treatment. By adopting the supply configuration, the crusher 30 can be installed separately from the supply systems for the storage tanks 51 and 54 and the water purification treatment, so that the installation space for the crusher 30 can be secured and linked with the basic equipment. Securement becomes easy, and application to existing facilities becomes easy. In particular, as in this example, it is preferable to transfer activated carbon by pneumatic transportation because the pulverizer 30 can be installed far away from the storage tanks 51 and 54 and the supply system for water purification treatment. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This facility 50 is suitable for the case where on-site grinding is added to an existing facility including only one activated carbon storage tank (an additional storage tank is required) or an existing facility including a plurality of storage tanks. In particular, since the pulverized product storage tank 51 and the injected product storage tank 54 are provided separately, and the pulverization system and the injection system are independent, pulverization and injection can be performed simultaneously, and the injection amount can be reduced. As long as the pulverization amount is not exceeded, the pulverized activated carbon having the target particle size can be manufactured and injected substantially continuously, so that the shortage of injected products and the reduction in adsorption performance are unlikely to occur.

  In the facility 50 of the second example, similarly to the facility 40 of the first example, the pulverization drive control based on the measured pulverization energy value and the appropriate pulverization energy value can be performed. Moreover, also in the installation of this Example 2, activated carbon injection | pouring with respect to a grinding | pulverization and a water purification process can be performed simultaneously, and the above-mentioned injection | pouring amount correction | amendment can also be performed in that case. In addition, within the scope of the basic configuration of Example 2, the same changes as in Example 1 can be made. In addition, since the same reference numerals are used for the same configurations as in Example 1, the description thereof is omitted.

<Example 3 of activated carbon injection equipment>
FIG. 10 shows another dry powder activated carbon injection facility 60 in which almost the same facilities as those of Example 1 are arranged in parallel, and most of the pulverization facility and the air transportation facility are used in common. That is, the facility 60 includes a first storage tank 61 that stores activated carbon, a first pulverized product supply path 62 that supplies the activated carbon stored in the first storage tank 61 to the pulverizer 30, and activated carbon. A second storage tank 70 that stores the activated carbon, a second pulverized product supply path 72 that supplies the activated carbon stored in the second storage tank 70 to the pulverizer 30, and pulverized activated carbon pulverized by the pulverizer 30 The activated carbon stored in the first storage tank 61 or the second storage tank 71 is stored in the first storage tank 61 or the second storage tank 72. The activated carbon used is selectively supplied to the water purification treatment.

  If it demonstrates in detail about the form of illustration, in the 1st storage tank 61, the dry powder raw coal carried in by the jet pack car JC etc. will be supplied via the raw coal supply piping 61i, and will be stored. The activated carbon stored in the first storage tank 61 is cut out via the damper 61d and the first storage tank rotary valve 61r, and supplied to the first switching machine 64 through the first storage tank quantitative supply device 61f. It has become. The first switching machine 64 is not particularly limited as long as the supply to the two systems can be switched. The illustrated first switching machine 64 includes a supply hopper 64h on one end side in the longitudinal direction of the screw shaft in the casing, and includes an injection system discharge port 64a and a pulverization system discharge port 64b at intervals on the other end side. A screw feeder that moves in an upward gradient toward the side, and is provided with on-off valves v3 and v4 on the outlet side of the respective discharge ports 64a and 64b, and selectively opens and closes the on-off valves v3 and v4. Can be switched. The part from the crushing system discharge port 64b of the 1st switching machine 64 in the 1st to-be-ground product supply path 62 to the crusher 30 is comprised by the pneumatic transport equipment in the illustration form. That is, the activated carbon discharged from the crushing system discharge port 64b is supplied to the first supply hopper 65h, and the activated carbon in the first supply hopper 65h is cut out by the first supply rotary valve 65r and supplied to the first supply ejector 65e. Then, the air supplied from the supply blower 65f is supplied to the receiving tank 65t installed in the vicinity of the pulverizer 30 and temporarily stored, and then cut out by the pulverizer quantitative supply device 31 to be pulverized. 30 is supplied in a fixed amount. On the other hand, the activated carbon discharged from the injection system discharge port 64a is quantitatively supplied to the first dissolution tank 67 with a stirrer, and is separately supplied from the in-situ water supply SW to the first dissolution tank 67 at a constant flow rate by the injection pump 67p. A slurry of activated carbon having a predetermined concentration is continuously produced by mixing with dissolved water, and a slurry overflowing at a constant flow rate from the first dissolution tank 67 is supplied to the first injection ejector 67e, and the flow rate is supplied from the in-situ water supply SW to the injection pump 67p. It is supplied to the injection point AP together with a constant and separately supplied drive water.

  The same applies to the second storage tank side. That is, in the second storage tank 71, the dry powder raw coal carried in the jet pack car JC or the like is supplied and stored through the raw coal supply pipe 71i. The activated carbon stored in the second storage tank 71 is cut out via the damper 71d and the second storage tank rotary valve 71r, and supplied to the second switch 74 through the second storage tank quantitative supply unit 71f. It has become. The second switching machine 74 is not particularly limited as long as the supply to the two systems can be switched. The illustrated second switching machine 74 includes a supply hopper 74h on one end side in the longitudinal direction of the screw shaft in the casing, and includes an injection system discharge port 74a and a pulverization system discharge port 74b with a gap on the other end side. A screw feeder that moves in an upward gradient toward the side, and is provided with on-off valves v3 and v4 on the outlet side of the respective discharge ports 74a and 74b, and selectively opens and closes the on-off valves v3 and v4. Can be switched. The part from the crushing system discharge port 74b of the 2nd switching machine 74 in the 2nd to-be-ground product supply path 72 to the grinder 30 is comprised by the pneumatic transport equipment in the illustration form. That is, the activated carbon discharged from the crushing system outlet 74b is supplied to the second supply hopper 75h, and the activated carbon in the second supply hopper 75h is cut out by the second supply rotary valve 75r and supplied to the second supply ejector 75e. Then, the air supplied from the supply blower 65f is supplied to the receiving tank 65t installed in the vicinity of the pulverizer 30 and temporarily stored, and then cut out by the pulverizer quantitative supply device 31 to be pulverized. 30 is supplied in a fixed amount. On the other hand, the activated carbon discharged from the injection system discharge port 74a is quantitatively supplied to the second dissolution tank 77 with a stirrer, and is separately supplied from the in-situ water supply SW to the constant flow rate by the injection pump 67p in the second dissolution tank 77. A slurry of activated carbon having a predetermined concentration is continuously produced by mixing with dissolved water, and a slurry overflowing at a constant flow rate from the second dissolution tank 77 is supplied to the second injection ejector 77e, and the flow rate is supplied from the in-situ water supply SW to the injection pump 67p. It is supplied to the injection point AP together with a constant and separately supplied drive water. In the illustrated embodiment, a single injection is used to commonly use the injection pump for the first dissolution tank 67 and the first injection ejector 67e and the injection pump for the second dissolution tank 77 and the second injection ejector 77e. The piping on the delivery side of the pump 67p is branched, and on-off valves v5 and v6 are provided on the downstream side of the branch point. By switching the on-off valves v5 and v6, the dissolved water for one of the dissolution tanks and the injection ejector The drive water supply can be selected.

  In the illustrated form, the pulverized product return path 63 extending from the pulverizer 30 to the first storage tank 61 and the second storage tank 71 is also constituted by pneumatic transportation equipment. That is, the pulverized activated carbon discharged from the pulverizer 30 is supplied to the hopper 66h, cut out by the return rotary valve 66r, supplied to the return ejector 66e, and returned by the air supplied from the return blower 66f. It is selectively returned to the first storage tank 61 or the second storage tank 71 via the pipe 66p. The return pipe 66p of the present facility 60 is a common part on the ejector side and a part branched from this common part into two paths, one of which is connected to the first storage tank 61 and the other is connected to the second storage tank 71. And an open / close valve v2 is provided on the downstream side of the branch point. By selectively opening and closing the open / close valve v2, only one of the first storage tank 61 and the second storage tank 71 is selected. It can be supplied. Further, the return pipe 66p of the present facility example 60 is joined to the raw coal supply pipes 61i and 71i, and on-off valves v1 and v2 are provided on the upstream side from the junction point, and the on-off valves v1 and v2 are selected. By opening and closing automatically, the supply of raw coal to the first storage tank 61 and the second storage tank 71 and the return of the pulverized activated carbon can be selected.

  When the crusher 30 can be installed in the vicinity of at least one of the first switching machine 64 and the second switching machine 74, or when it can be installed in the vicinity of at least one of the first storage tank 61 and the second storage tank 71, crushing Between the machine 30 and nearby equipment, the pneumatic transportation equipment can be omitted and directly connected, or other mechanical transfer equipment can be used.

  In the illustrated embodiment, in order to perform the above-described pulverizer drive control, the first pulverized product supply path 62 and the second pulverized product supply path 72 are joined to one pipe on the way, and more than this joining point. A particle size measuring device 32 is provided in the common pipe on the downstream side, and the measurement result is transmitted to the control device 33. As indicated by the dotted line, power is transmitted from the pulverizer 30 to the control device 33, and the supply amount (supply mass per unit time) is supplied from the pulverizer quantitative supply device 31 as necessary. The control device 33 transmits a control signal for the pulverization drive source to the pulverizer 30.

  The activated carbon injection facility 60 described above has a circulation path in which activated carbon circulates in the first storage tank 61 and the pulverizer 30 and a circulation path in which activated carbon circulates in the second storage tank 71 and the pulverizer 30 as follows. By alternately using for pulverization, pulverized activated carbon in the storage tank after pulverization can be used for injection. For example, when the pulverization operation is started from the initial state where the raw coal is stored in the first storage tank 61, the return air transport facility (return fan 66f, return rotary valve 66r), pulverization facility (pulverizer 30, The pulverizer quantitative feeder 31) starts operation in this order. These operations are stopped when the storage level of the receiving tank 65t is equal to or lower than a predetermined low level (LL), but are continued unless the storage level is low. .

  On the other hand, when the storage level of the receiving tank 65t is LL or less with the start of the pulverization operation, the first storage tank rotary valve 61r, the first storage tank quantitative supply device 61f, the first switching device 64, and the supply pneumatic transport The equipment (supply fan 65f, supply rotary valve 65r) starts operation, and the on-off valve v3 is opened and the on-off valve v4 is closed so that the first switching machine 64 discharges to the crushing system discharge port 64b. These operations are stopped when the storage level of the receiving tank 65t becomes equal to or higher than a predetermined high level (HL), but are continued as long as the level does not become high. When the storage level of the receiving tank 65t exceeds the low level, as described above, the pulverization facility and the return air transport facility start operation, and the activated carbon cut out from the first storage tank 61 is received via the supply air transport facility. While being sequentially supplied to the tank 65t, the pulverized activated carbon supplied from the receiving tank 65t to the pulverizer 30 and discharged from the pulverizer 30 is returned to the first storage tank 61 by the return air facility. The grinding operation is continued until the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 becomes the target particle size representative value. As a result, the first storage tank 61 stores the pulverized activated carbon having the target particle size representative value.

  Next, when the raw coal is supplied to the second storage tank 71, or when the raw coal is stored in the second storage tank 71 in advance, as in the case of the first storage tank 61, the second storage tank 71 and pulverization are performed. The activated carbon is circulated and pulverized with the machine 30. That is, the return pneumatic transport equipment (return fan 66f, return rotary valve 66r) and the grinding equipment (grinding machine 30, fixed quantity feeder for grinding machine 31) start operation in this order. If the storage level of 65t is equal to or lower than a predetermined low level (LL), the operation stops, but continues unless the storage level is low. With the start of the pulverization operation, when the storage level of the receiving tank 65t is LL or less, the second storage tank rotary valve 71r, the second storage tank fixed amount supply device 71f, the second switching device 74, and the supply air transport facility ( The supply fan 65f and the supply rotary valve 75r) start operation, and the on-off valve v3 is opened and the on-off valve v4 is closed so that the second switching device 74 discharges to the crushing system discharge port 74b. These operations are stopped when the storage level of the receiving tank 65t becomes equal to or higher than a predetermined high level (HL), but are continued as long as the level does not become high. When the storage level of the receiving tank 65t exceeds the low level, as described above, the pulverization facility and the return air transport facility start operation, and the activated carbon cut out from the second storage tank 71 is received via the supply air transport facility. While being sequentially supplied to the tank 65t, the pulverized activated carbon supplied from the receiving tank 65t to the pulverizer 30 and discharged from the pulverizer 30 is returned to the second storage tank 71 by the return air facility. The grinding operation is continued until the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 becomes the target particle size representative value. As a result, the second storage tank 71 stores the pulverized activated carbon having the target particle size representative value.

  On the other hand, when the activated carbon is injected in the water purification treatment, the injection is performed from any one of the first storage tank 61 and the second storage tank 71 that stores the activated carbon pulverized to the target particle size representative value. For example, if activated carbon pulverized to the target particle size representative value is stored in the first storage tank 61 and circulation pulverization is performed between the second storage tank 71 and the pulverizer 30, the first dissolution tank 67 is now stored. The operation of the infusion pump 67p leading to is started, the on-off valve v5 is opened, the on-off valve v6 is closed, dissolved water is supplied to the first dissolving tank 67, and driving water is supplied to the first injecting ejector 67e. The operation of the first storage tank rotary valve 61r, the first storage tank quantitative supply device 61f, and the first switching device 64 is started, and the on-off valve v3 is closed and opened so that the first switching device 64 discharges to the injection system discharge port 64a. Switch valve v4 to open. Thereby, the pulverized activated carbon stored in the first storage tank 61 is cut out and supplied to the first dissolution tank 67 in a fixed amount. In the first dissolution tank 67, activated carbon slurry having a predetermined concentration is manufactured, and this activated carbon slurry is supplied to the injection point AP.

  When the pulverized activated carbon in the first storage tank 61 has been used up, the on-off valves v3 and v4 are switched so that the first switching machine 64 discharges to the pulverization system outlet, and the first storage tank 61 side is switched to the pulverization operation. At this time, the activated carbon pulverized to the target particle size representative value is stored in the second storage tank 71, and when the injection is continued, the on-off valve v5 is closed and the on-off valve v6 is switched to open and dissolved. While supplying water to the 2nd dissolution tank 77 and driving water to the 2nd injection ejector 77e, operation of the 2nd storage tank rotary valve 71r, the 2nd storage tank fixed quantity supply machine 71f, and the 2nd change machine 74 is carried out, respectively. The on-off valves v3 and v4 are switched so that the second switching device 74 discharges to the injection system discharge port 74a. Thereby, the pulverized activated carbon stored in the second storage tank 71 is cut out and supplied to the second dissolution tank 77 in a fixed amount. In the second dissolution tank 77, activated carbon slurry having a predetermined concentration is produced, and this activated carbon slurry is supplied to the injection point.

  The pulverization / injection switching of the first storage tank 61 and the second storage tank 71 can be performed at any time such as during the injection in which activated carbon remains sufficiently in the storage tank in use, at the time of equipment failure, during equipment maintenance, etc. You may go on.

  Rather than interposing a pulverizer in the path for supplying water from the storage tank to the water purification treatment as in the present facility 60, the activated carbon circulates through the first storage tank 61 and the pulverizer 30, and the activated carbon is the second. The storage tank 71 and a circulation path that circulates through the pulverizer 30 are configured, and the pulverization can be repeatedly performed on each of the circulating activated carbon, and the water purification process is selected from the first storage tank 61 or the second storage tank 71. Since the pulverized activated carbon is supplied, the pulverizer 30 can be installed separately from the supply system for the first storage tank 61 and the second storage tank 71 and the water purification process. It is easy to secure the installation space and interlock with the basic equipment, making it easy to apply to existing equipment. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This facility 60 is suitable when adding on-site crushing to an existing facility having only one activated carbon storage tank (an additional storage tank is required) or an existing facility having a plurality of storage tanks. In particular, since two systems of activated carbon circulation paths for pulverization are provided independently, pulverization and injection can be performed simultaneously by using one for pulverization and the other for injection. As long as the amount does not exceed the pulverization amount, pulverized activated carbon having the target particle size can be manufactured and injected substantially continuously, so that the shortage of injection products and the reduction in adsorption performance are unlikely to occur. Furthermore, a pulverization facility (a pulverizer 30 and a pulverizer quantitative supply device 31) and the like can be individually provided in each of the circulation paths of the activated carbon for pulverization, but in this facility 60, only one pulverizer 30 is sufficient. Therefore, there is an advantage that the installation space is small for the device configuration.

  In the facility 60 of the third example, similarly to the facility of the first example, pulverization drive control based on the measured pulverization energy value and the appropriate pulverization energy value can be performed. Moreover, also in the installation of this Example 2, activated carbon injection | pouring with respect to a grinding | pulverization and a water purification process can be performed simultaneously, and the above-mentioned injection | pouring amount correction | amendment can also be performed in that case. In addition, within the scope of the basic configuration of Example 3, the same changes as in Example 1 can be made. In addition, since the same reference numerals are used for the same configurations as in Example 1, the description thereof is omitted.

<Others>
In the above embodiment, circulation pulverization is possible, but circulation pulverization is not necessary if the target particle size is reached by only one pulverization without circulation.
-Although the said embodiment is an application example to dry powder activated carbon injection equipment, this invention can also be applied to wet powder activated carbon injection equipment.

  The present invention is used to purify water to be treated such as river water and various industrial water with activated carbon.

  AP: injection point, C1: activated carbon to be pulverized, C2: pulverized activated carbon, CW: treated water, DC: dry powder activated carbon, RW: raw water, SW: water supply, SW: in-site water supply, WC: wet powder activated carbon, bg: bug Filter, pg ... Cooling air purge, v1, v2 ... Open / close valve, v3, v4 ... Open / close valve, v5, v6 ... Open / close valve, 1 ... Mixing pond, 2 ... Flock formation pond, 3 ... Sedimentation basin, 4 ... Filtration basin, 10 DESCRIPTION OF SYMBOLS ... Dry powder activated carbon injection equipment, 11 ... Activated carbon storage tank, 12 ... Vibration ejector, 13 ... Rotary valve, 14, 18 ... Powder fixed quantity supply machine, 15 ... Dissolution tank, 16 ... Pump, 17 ... Ejector, 20 ... Wet powder Activated carbon injection equipment, 21 ... dissolution tank, 22 ... injection pump, 30 ... pulverizer, 31 ... quantitative supply device for pulverizer, 32 ... particle size measuring device, 33 ... control device, 41 ... storage tank, 41d ... damper, 41 ... coking coal supply pipe, 41r ... storage tank rotary valve, 42 ... crushed product supply path, 43 ... crushed product return path, 44 ... distributed metering feeder, 44a ... first metering supply unit, 44b ... second metering supply unit 44h ... Hopper, 45e ... Ejector for supply, 45f ... Blower for supply, 45r ... Rotary valve for supply, 45t ... Receiving tank, 46e ... Ejector for return, 46f ... Blower for return, 46h ... Hopper, 46p ... Return pipe, 46r ... Rotary valve for return, 47 ... Dissolution tank, 47e ... Injection ejector, 47p ... Injection pump, 50 ... Dry powder activated carbon injection equipment, 51 ... Shattered article storage tank, 51d ... Damper, 51i ... Coal supply pipe, 52 ... pulverized product supply path, 53 ... pulverized product return path, 54 ... injection product storage tank, 54d ... damper, 54f ... injection quantitative meter, 54r ... injection product low Tally valve, 55e ... ejector for supply, 55f ... blower for supply, 55r ... rotary valve for supply, 55t ... receiving tank, 56e ... ejector for return, 56f ... blower for return, 56h ... hopper, 56p ... return pipe, 56r ... Rotary valve for return, 57 ... Dissolution tank, 57e ... Injection ejector, 57p ... Injection pump, 60 ... Dry powder activated carbon injection equipment, 61 ... First storage tank, 61d ... Damper, 61f ... First storage tank quantitative supply machine, 61i ... coking coal supply pipe, 61r ... first storage tank rotary valve, 62 ... first pulverized product supply path, 63 ... crushed product return path, 64 ... first switching machine, 64a ... injection system discharge port, 64b ... pulverization system Discharge port, 64h ... supply hopper, 65e ... first supply ejector, 65f ... supply blower, 65h ... first supply hopper, 65r ... first supply rotor -Valve, 65t ... receiving tank, 66e ... return ejector, 66h ... hopper, 66p ... return pipe, 66r ... return rotary valve, 67 ... first dissolution tank, 67e ... first injection ejector, 67p ... injection pump, 70 ... 2nd storage tank, 71d ... damper, 71f ... 2nd storage tank fixed quantity feeder, 71i ... coking coal supply pipe, 71r ... 2nd storage tank rotary valve, 72 ... 2nd to-be-ground product supply path, 74 ... 2nd switching 74a ... injection system discharge port, 74b ... grinding system discharge port, 74h ... feed hopper, 75e ... second supply ejector, 75h ... second supply hopper, 75r ... second supply rotary valve, 77 ... second melting tank 77e ... Second injection ejector.

  The present invention relates to a powdered activated carbon injection facility and a powdered activated carbon injection method.

  In recent years, so-called advanced water purification treatment has been adopted to treat odorous substances, trihalomethane-forming substances, anionic surfactants, ammonia nitrogen, and the like that cannot be adequately handled by ordinary water purification treatment. The advanced water purification treatment includes an ozone treatment method, an activated carbon treatment method, a biological treatment method, and the like, and these treatment methods are used alone or in combination according to the condition of the water to be treated.

  Among these, in the activated carbon treatment method, as shown in FIG. 1 to FIG. 3, the activated carbon filter basin is provided with an activated carbon filter basin that performs filtration with a granular activated carbon layer on the upstream side or downstream side of the rapid filter basin of the water purification plant. In this case, the activated carbon DC and WC are injected (added) into the raw water RW in the landing well 6 or the water conduit 5 upstream thereof. More specifically, the illustrated example is a mixing pond for adding raw water (treated water) RW such as river water supplied to the landing well (or raw water tank) 6 through the water conduit 5 and adding a flocculant or the like. 1. Based on a general water purification form purifying through a floc formation pond 2 for forming flocs, a sedimentation basin 3 for precipitating flocs, and a filtration basin 4 for filtering water with a sand layer or the like, the raw water RW Prior to supply to the mixing basin 1, powdered activated carbon DC and WC are added to the raw water RW at the injection point of the landing well 6 or the water conduit 5 upstream thereof by the powdered activated carbon injection facility 10.

  Examples of powder activated carbon injection equipment (also called powder activated carbon addition equipment) include equipment 10 using dry powder activated carbon in a dry state as shown in FIGS. 1 and 2, and wet powder containing moisture as shown in FIG. A facility 20 using activated carbon WC is known.

  In the wet powder activated carbon injection facility 20, an operator operates a crane to put wet powder activated carbon WC carried in a flexible container bag (flexible container bag) FB into a dissolution tank 21 with a stirrer, and supplies water in the dissolution tank 21. To produce a slurry of activated carbon having a predetermined concentration, and this slurry is supplied to the injection point by the injection pump 22 and mixed with the raw water RW. In this case, since the slurry is manufactured batchwise, normally, a plurality of dissolution tanks 21 are installed, and the other dissolution tanks 21 prepare for the next injection while injecting from the dissolution tanks 21 where the manufacture of the slurry is completed. A slurry will be produced. In addition, by always using a specified amount of flexible container bag FB and mixing with a specified amount of water supply SW, a slurry having a specified concentration is produced in the dissolution tank 21, and by changing the supply flow rate of the injection pump 22, The amount of activated carbon injected into the raw water RW can be controlled.

  The wet powder activated carbon injection facility 20 has the advantage that the facility is simple and the construction cost is relatively low compared with the dry powder activated carbon injection facility 10, but the flexible container bag FB is moved and put into the dissolution tank 21. In addition to the problem that a worker is required for the work and it is difficult to fully automate, there is a problem that the accuracy of the activated carbon injection has to be lowered because the activated carbon is dissolved by the flexible container bag FB. doing.

  In general, in an activated carbon injection facility, in order to reduce running costs, the activated carbon injection amount is changed according to changes in the quality of raw water to minimize the amount of activated carbon used. However, in order to respond finely to changes in the water quality of raw water, there is a limit in the wet powder activated carbon method in which manpower is indispensable and the accuracy of the activated carbon injection amount is low, and in this respect, the dry powder activated carbon method is superior.

  As shown in FIGS. 1 and 2, the dry powder activated carbon injection facility 10 stores dry powder activated carbon (raw carbon) DC that is carried in a jet pack car JC or the like in an activated carbon storage tank 11, The dry powder activated carbon DC of the activated carbon storage tank 11 is quantitatively supplied to the dissolution tank 15 with a stirrer via the supply units 12 to 14 and 18 with variable supply amounts, and the flow rate is constant from the in-situ water supply SW in the dissolution tank 15. A slurry of activated carbon having a predetermined concentration is continuously produced by mixing with dissolved water supplied separately, and slurry that overflows from the dissolution tank 15 at a constant flow rate is separately supplied from the in-site water supply SW by the pump 16 at a constant flow rate by the ejector 17. It is supplied to the injection point together with the driving water to be added to the raw water RW. In some cases, a slurry is supplied from the dissolution tank 15 to the injection point using a pump instead of the ejector 17. In addition, the code | symbol 19 of FIG. 1 has shown the flow regulating valve for supplying dissolved water to the dissolution tank 15 by constant flow. In addition, in the example of equipment shown in FIG. 1, the supply units 12 to 14 are provided with the vibration discharger 12 provided at the discharge port of the activated carbon storage tank 11 and the dry powder activated carbon DC discharged by the vibration discharger 12. It is mainly composed of a rotary valve 13 that cuts out with a cut-out amount, and a powder feed quantity variable supply device 14 that feeds dry powder activated carbon DC cut out by the rotary valve 13 into a dissolution tank 15 in a variable quantity, and the powder quantity is determined. As the feeder 14, a measuring tank reduction control method (feedback control) is adopted. This metering tank weight reduction control type powder quantification feeder 14 includes a metering tank for temporarily storing and metering dry powder activated carbon DC, a load cell for measuring the weight of the metering tank, and a dry cell in the metering tank. A cutting supply unit that cuts powdered activated carbon DC at a predetermined volume, considering the reduction of the measuring tank by the load cell as the discharge amount, and the cutting speed so that the discharge amount is constant (in the case of a rotary cutting mechanism, the number of rotations) ) Is variably controlled. As an example of the powder quantification feeder of the measuring tank weight loss control system, there can be mentioned a powder quantification feeder “Funken Auto Feeder”, etc., produced by Gakken Powtex.

  On the other hand, in the facility example shown in FIG. 2, the supply unit 18 supplies a variable amount of powder to the dry powder activated carbon DC stored in the activated carbon storage tank 11 with a predetermined cutout amount and supplies it to the dissolution tank 15. It is mainly composed of only 18 and a cut-out weight control type is adopted as the powder fixed quantity feeder 18. The cut-out weight control type powder quantitative supply machine 18 includes a cut-out unit that cuts dry powder activated carbon DC into a predetermined volume, and a weighing scale side unit that measures the weight of the cut-out predetermined volume of dry powder activated carbon DC, The actual supply amount of dry powder activated carbon DC is calculated based on the weight measurement result and the cutting speed (rotation speed in the case of a rotary cutting mechanism), and the cutting speed is variably controlled so that this actual supply amount becomes the set supply amount. To do. As an example of the cut-out weight control type powder quantitative supply device 18, there can be mentioned a cell supply checker “cell in checker” built in a load cell. The above-mentioned metering-quantity feeder 14 of the weighing tank reduction control method is likely to have a large supply accuracy error due to disturbance effects (vibrations caused by wind and human walking) when the supply amount is small (when the cut-out amount per hour is small). On the other hand, the cut-out weight control type powder quantitative supply machine 18 is not affected by disturbances, so that the supply accuracy is high and the disturbance countermeasure cost can be reduced, and the vibration ejector 12 and rotary valve in the weighing tank weight reduction control type. 13 and the metering tank of the powder fixed amount supply device 14 are unnecessary, which is advantageous in terms of reducing the equipment cost and suppressing the equipment installation height.

  The facility example 10 shown in FIGS. 1 and 2 is easier to fully automate than the wet powder activated carbon injection facility, and since the activated carbon supply to the dissolution tank 15 is performed by the quantitative feeders 14 and 18, the accuracy of the activated carbon injection amount is high. It is high, and the responsiveness of changing the injection amount is fast, so that it is suitable for finer control and is suitable for emergency response.

  In powder activated carbon injection, it is known to use fine activated carbon having a D50 of about 0.01 to 10 μm for the purpose of improving adsorption performance and reducing activated carbon consumption, thereby becoming a raw material. It is also known that powdered activated carbon (hereinafter also referred to as raw coal) is injected on-site, that is, after being pulverized by a pulverizer at a water purification plant into fine pulverized activated carbon (see Patent Documents 1 to 4).

  However, the conventional activated carbon injection by on-site pulverization involves injecting the pulverized activated carbon discharged from the pulverizer as it is, and it is difficult to ensure the installation space of the pulverizer and the interlocking with the basic equipment. However, it was difficult to apply to existing water purification equipment.

JP-A-10-309567 Japanese Patent No. 4468895 JP2013-233486A Japanese Patent Laid-Open No. 2006-036803

  Then, the main subject of this invention is providing the powder activated carbon injection | pouring technique with easy application with respect to the existing water purification plant.

<First aspect>
In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
An activated carbon reservoir,
The pulverized product supply path for supplying the activated carbon stored in the storage tank to the pulverizer,
Including a pulverized product return path for returning the pulverized activated carbon pulverized by the pulverizer to the storage tank;
The activated carbon stored in the storage tank is configured to supply the purified water treatment.
Powder activated carbon injection equipment characterized by that.

(Function and effect)
Instead of interposing a pulverizer in the path for supplying water to the water purification treatment from the storage tank as in this embodiment, the activated carbon constitutes a circulation path for circulating the storage tank and the pulverizer, and pulverizes the circulating activated carbon. By adopting a configuration in which the pulverized activated carbon is supplied from the storage tank to the water purification treatment, the crusher can be installed separately from the supply system for the storage tank and the water purification treatment. It will be easy to secure the installation space of the machine and interlock with the basic equipment, and it will be easy to apply to existing equipment. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This aspect is suitable for the case where on-site pulverization is added to an existing facility having only one activated carbon storage tank without adding the storage tank. In particular, since the pulverized activated carbon is supplied to the water purification process from the storage tank constituting the pulverization circulation system, not only the pulverization and the injection are repeated, but also simultaneously as necessary.

<Second aspect>
Having a dissolution tank for continuously producing a slurry of activated carbon having a predetermined concentration by mixing the pulverized activated carbon and separately dissolved water supplied at a constant flow rate;
Having an injectable product quantitative supply machine for continuously supplying the activated carbon stored in the storage tank to the dissolution tank;
The slurry continuously produced in the dissolution tank is configured to supply to the water purification treatment,
In the pulverized product supply path or pulverized product return path, it has a particle size measuring device for measuring the representative particle size of activated carbon,
In accordance with the increase or decrease of the particle size representative value measured by the particle size measuring device, it has a control device that increases or decreases the supply amount of the infusion product quantitative supply machine,
The powdered activated carbon injection equipment of a 1st aspect.

(Function and effect)
As described above, according to the first aspect, when injection is necessary before pulverization to the target particle size is completed, pulverization and injection can be performed simultaneously. However, in that case, since the injection is performed in a state where the pulverization is insufficient, the adsorption performance is reduced as compared with the case where the pulverized activated carbon having the target particle size is injected. In other words, the amount of pulverized activated carbon injected is insufficient. Therefore, as in the case of the second aspect, a control device is provided for increasing or decreasing the supply amount of the infusion product quantitative supply machine according to the increase or decrease of the representative particle size measured by the particle size measuring device, and the pulverized activated carbon having the target particle size is injected. It is desirable to correct the injection amount of the pulverized activated carbon so that the same adsorption performance as that obtained can be obtained.

<Third Aspect>
Part or all of the path from the storage tank to the pulverizer and part or all of the pulverized product return path in the pulverized product supply path transfer activated carbon by pneumatic transportation. Or the powdered activated carbon injection | pouring equipment of 2 aspect.

(Function and effect)
Since the activated carbon is transferred by pneumatic transportation as in this embodiment, the pulverizer can be installed far away from the supply system for the storage tank and the water purification treatment, which is preferable.

<Fourth aspect>
In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
To-be-ground product storage tank for storing to-be-ground activated carbon,
An infusion storage tank for storing pulverized activated carbon pulverized to a target particle size;
A pulverized product supply path for supplying the pulverized activated carbon stored in the pulverized product storage tank to the pulverizer,
The pulverized activated carbon pulverized by the pulverizer includes a pulverized product return path for selectively returning the pulverized activated carbon storage tank or the injected product storage tank,
The pulverized activated carbon stored in the infusion product storage tank is configured to supply the purified water treatment.
Powder activated carbon injection equipment characterized by that.

(Function and effect)
Instead of interposing a pulverizer in the path for supplying water to the water purification treatment from the storage tank as in this aspect, the activated carbon constitutes a circulation path for circulating the article storage tank and the pulverizer, and the circulated activated carbon By adopting a configuration in which pulverized activated carbon pulverized to the target particle size is stored in the injected product storage tank and pulverized activated carbon can be supplied to the water purification treatment from this injected product storage tank. Since the crusher can be installed separately from the storage system for the storage tank and water purification treatment, it is easy to secure the installation space of the crusher and interlock with the basic equipment, making it easy to apply to existing equipment. Become. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This aspect is suitable when adding on-site crushing to an existing facility having only one activated carbon storage tank (an additional storage tank is required) or an existing facility having a plurality of storage tanks. In particular, since the pulverized product storage tank and the injected product storage tank are provided separately, and the pulverization system and the injection system are independent, pulverization and injection can be performed simultaneously, and the injection amount is pulverized. As long as the amount is not exceeded, the pulverized activated carbon having the target particle size can be manufactured and injected substantially continuously, so that the shortage of injection products and the reduction in adsorption performance are unlikely to occur.

<Fifth aspect>
The powder activated carbon injection facility according to the fourth aspect, wherein a part or all of the pulverized product supply path and a part or all of the pulverized product return path transfer activated carbon by pneumatic transportation.

(Function and effect)
Since the activated carbon is transferred by pneumatic transportation as in this embodiment, the pulverizer can be installed far away from the supply system for the storage tank and the water purification treatment, which is preferable.

<Sixth aspect>
In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
A first storage tank for storing activated carbon;
A first pulverized product supply path for supplying the activated carbon stored in the first storage tank to the pulverizer;
A second storage tank for storing activated carbon;
A second pulverized product supply path for supplying activated carbon stored in the second storage tank to the pulverizer;
Pulverized activated carbon pulverized by the pulverizer, including a pulverized product return path for selectively returning the pulverized activated carbon to the first storage tank or the second storage tank,
Activated carbon stored in the first storage tank, or activated carbon stored in the second storage tank is configured to selectively supply the purified water treatment.
Powder activated carbon injection equipment characterized by that.

(Function and effect)
As in this embodiment, the pulverizer is not interposed in the path for supplying water from the storage tank to the water purification treatment, but the circulation path through which the activated carbon circulates the first storage tank and the pulverizer, and the activated carbon is the second storage tank and A circulation path that circulates through the pulverizer, and a configuration in which pulverization can be repeatedly performed on each activated carbon, and the pulverized activated carbon is selectively supplied from the first storage tank or the second storage tank to the water purification treatment. By adopting the configuration, the crusher can be installed separately from the storage system for the storage tank and water purification treatment, so it is easy to secure the installation space of the crusher and interlock with the basic equipment. Application to is easy. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This aspect is suitable when adding on-site crushing to an existing facility having only one activated carbon storage tank (an additional storage tank is required) or an existing facility having a plurality of storage tanks. In particular, since two systems of activated carbon circulation paths for pulverization are provided independently, pulverization and injection can be performed simultaneously by using one for pulverization and the other for injection. As long as the amount does not exceed the pulverization amount, pulverized activated carbon having the target particle size can be manufactured and injected substantially continuously, so that the shortage of injection products and the reduction in adsorption performance are unlikely to occur. Furthermore, although two circulation paths of activated carbon for pulverization are required, since only one pulverizer is required, there is an advantage that a small installation space is required for the equipment configuration.

<Seventh aspect>
Part or all of the first pulverized product supply path, part or all of the first pulverized product 2 supply path, and part or all of the pulverized product return path transfer activated carbon by pneumatic transportation. A powdered activated carbon injection facility according to a sixth aspect.

(Function and effect)
Since the activated carbon is transferred by pneumatic transportation as in this embodiment, the pulverizer can be installed far away from the supply system for the storage tank and the water purification treatment, which is preferable.

<Eighth aspect>
In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
Supplying activated carbon stored in an activated carbon storage tank to the pulverizer;
Return the pulverized activated carbon crushed by the pulverizer to the storage tank,
Supplying activated carbon stored in the storage tank to the water purification treatment,
A method for injecting powdered activated carbon.

(Function and effect)
The same effects as those of the first aspect can be achieved.

<Ninth aspect>
In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
Supplying activated carbon to be crushed stored in a pulverized product storage tank for storing activated carbon to be crushed, to the pulverizer;
The pulverized activated carbon that does not reach the target particle size pulverized by the pulverizer is returned to the pulverized product storage tank,
Supplying the pulverized activated carbon that has reached the target particle size pulverized by the pulverizer, to the injection storage tank,
Supply the pulverized activated carbon stored in the infusion product storage tank to the water purification treatment,
A method for injecting powdered activated carbon.

(Function and effect)
The same effect as the 4th mode is produced.
<Tenth aspect>
In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
While selectively supplying activated carbon stored in one of the first storage tank and the second storage tank to the pulverizer,
Return the pulverized activated carbon crushed by the pulverizer to the one storage tank,
Selectively supplying activated carbon stored in the other storage tank of the first storage tank and the second storage tank to the water purification treatment;
A method for injecting powdered activated carbon.

(Function and effect)
The same effects as the sixth aspect are achieved.

  As described above, according to the present invention, there are advantages such as a powdered activated carbon injection technique that can be easily applied to existing water purification facilities.

It is a flowchart of the conventional dry powder activated carbon utilization water purification processing equipment. It is a flowchart of the conventional dry powder activated carbon utilization water purification processing equipment. It is a flowchart of the conventional water purification equipment using wet powder activated carbon. It is a flowchart of an on-site grinding | pulverization process. It is a graph which shows the relationship between D50 ratio and grinding | pulverization energy. It is a flowchart of the dry powder activated carbon injection equipment of Example 1. It is a flowchart of a grinding | pulverization driving | operation. It is a flowchart of injection | pouring driving | operation. 6 is a flowchart of the dry powder activated carbon injection facility of Example 2. FIG. 6 is a flowchart of the dry powder activated carbon injection facility of Example 3. FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
<Example of grinding control>
FIG. 4 schematically shows an on-site pulverization process for producing pulverized activated carbon having a stable particle size regardless of changes in the particle size of the raw coal. The activated carbon C1 to be crushed, such as raw coal, is supplied to the pulverizer 30, and the pulverized activated carbon C2 pulverized by the pulverizer 30 is supplied directly or indirectly to the water purification treatment, and again as the pulverized activated carbon C1. It may be returned to 30 and circulated and ground.

  As the pulverizer 30, a pulverizer that continuously pulverizes and that has a correlation between the ratio of the representative particle size of the activated carbon before and after pulverization and the pulverization energy required for pulverizing the unit processing amount is used. As such a pulverizer 30, a wet pulverizer can be used. However, since it is difficult to stably obtain a sharp particle size distribution, it is possible to obtain a sharp particle size distribution by a single pulverization process. A dry pulverizer such as a jet mill is preferable, and a dry bead mill is particularly preferable.

  FIG. 5 shows the relationship between the ratio of the D50 of the activated carbon after pulverization to the D50 of the activated carbon before pulverization in the dry bead mill and the pulverization energy required for pulverizing the unit throughput. It can be seen that there is a good correlation between the ratio of the representative particle size of the activated carbon before and after pulverization and the pulverization energy required for pulverizing the unit throughput.

  The particle size representative value is D50 (median value. As is well known, it means a particle size corresponding to 50% cumulative from the smaller diameter side of the cumulative volume distribution in the particle size distribution, and is generally referred to as an average particle size. (Meaning the particle size measured by the laser diffraction scattering method) is preferable, but in addition to the mode value and the arithmetic average value (number average, length average, area average, or volume average), D10 and D90 You can also

  Further, the activated carbon C1 to be crushed to the pulverizer 30 is supplied by a pulverizer quantitative supply device 31 that can perform continuous quantitative supply. As the pulverizer constant supply device 31, known ones such as the above-described measuring tank weight reduction control method and the cut-out weight control method can be used without particular limitation. The pulverizer quantitative supply device 31 may be provided in the pulverizer 30 or may be provided separately from the pulverizer 30.

  Characteristically, a particle size measuring device 32 that measures the particle size representative value of the activated carbon C1 to be crushed is provided, and the target particle size measured by the particle size measuring device 32 with respect to the target particle size representative value (the target particle size representative value). Based on the ratio of the representative particle size of the pulverized activated carbon C1 and the above-described correlation, an appropriate pulverization energy value is obtained, and a control device 33 that performs drive control of the drive source of the pulverizer 30 so as to perform pulverization with the appropriate pulverization energy value is provided. Provide. When the activated carbon C1 to be crushed is a dry powder, a commercially available in-line dry particle size sensor (particle size distribution measuring device) can be used as the particle size measuring device 32, and a known control device such as a sequence controller can be used as the control device 33. 33 can be used.

  In order to perform drive control of the drive source of the pulverizer 30 so that the pulverization energy is appropriate, the actual pulverization energy measurement value of the pulverizer 30 at that time is obtained, and the drive source is, for example, a motor so that the difference is eliminated. In this case, the rotational speed of the motor is increased or decreased. When the pulverizer 30 is electrically powered, the actual pulverization energy value is a value obtained by dividing the power consumption (instantaneous value) of the pulverizer 30 by the supply mass per unit time of the pulverizer constant supply device 31. Corresponds to the power consumption per unit mass of activated carbon. The supply mass per unit time of the pulverizer quantitative feeder 31 is fixed, and when the pulverizer quantitative feeder 31 has a measurement function, the measurement result can be used.

  By such control by the control device 33, even if the particle size of the raw coal changes, pulverized activated carbon having the target particle size can be stably produced and injected, and excessive or insufficient use of activated carbon can be prevented. The measurement by the particle size measuring device 32 and the drive control of the pulverizer 30 may be performed intermittently with an appropriate time interval or continuously.

<Example 1 of activated carbon injection equipment>
FIG. 6 shows a dry powder activated carbon injection facility 40. The equipment 40 includes an activated carbon storage tank 41, a pulverized product supply path 42 that supplies activated carbon stored in the storage tank 41 as pulverized activated carbon to the pulverizer 30, and pulverized by the pulverizer 30. The pulverized product return path 43 for returning the activated carbon to the storage tank 41 and the activated carbon stored in the storage tank 41 can be supplied to the injection point AP of the water purification treatment.

  If it demonstrates in detail about the form of illustration, in the storage tank 41, the dry powder raw coal carried in by the jet pack car JC etc. will be supplied via the raw coal supply piping 41i, and will be stored. The raw coal stored in the storage tank 41 is cut out via the damper 41d and the storage tank rotary valve 41r and supplied to the distribution fixed quantity supply unit 44. The distribution quantitative supply unit 44 can distribute and supply two systems (including selective supply to either one) and can supply a fixed quantity to each system. In the illustrated embodiment, a hopper 44h and a first fixed supply unit 44a and a second fixed supply unit 44b for independently and quantitatively cutting the activated carbon in the hopper 44h are provided. The part from the 1st fixed supply part 44a to the grinder in the to-be-ground product supply path 42 is comprised by the pneumatic transport equipment in the illustration form. That is, the activated carbon supplied from the first fixed supply unit 44a is supplied to the supply ejector 45e via the supply rotary valve 45r, and is installed near the crusher 30 by the air supplied from the supply blower 45f. After being supplied to the receiving tank 45t and temporarily stored, it is cut out by the pulverizer quantitative supply device 31 and supplied to the pulverizer 30 in a fixed amount.

  In the illustrated embodiment, the pulverized product return path 43 from the pulverizer 30 to the activated carbon storage tank 41 is also constituted by pneumatic transportation equipment. That is, the pulverized activated carbon pulverized by the pulverizer 30 is supplied from the pulverizer 30 to the hopper 46h, then cut out by the return rotary valve 46r, supplied to the return ejector 46e, and supplied from the return blower 46f. The air is returned to the storage tank 41 via the return pipe 46p. The return pipe 46p of the present facility example 40 is joined to the raw coal supply pipe 41i, and on-off valves v1 and v2 are provided on the upstream side of the junction point, and the on-off valves v1 and v2 are selectively connected. By opening and closing, supply of raw coal to the storage tank 41 and return of pulverized activated carbon can be selected.

  The activated carbon cut out by the second fixed amount supply unit 44b of the distribution fixed amount supply unit 44 is supplied in a fixed amount to a dissolution tank 47 with a stirrer, and dissolved water and dissolution tank 47 separately supplied at a constant flow rate from the in-situ water supply SW by an injection pump 47p. A slurry of activated carbon having a predetermined concentration is continuously produced by mixing in the reactor, and a slurry that overflows from the dissolution tank 47 at a constant flow rate is supplied to the injection ejector 47e, and is separately supplied from the on-site water supply SW at a constant flow rate by the injection pump 47p. It is supplied to the injection point AP together with the driving water. A method of supplying activated carbon stored in the storage tank 41 to the water purification process, such as supplying slurry from the dissolution tank 47 to the injection point AP using a pump instead of the injection ejector 47e, is not particularly limited. Absent.

  The storage tank 41 and the receiving tank 45t are preferably provided with a bag filter bg for venting air and a cooling air purge pg for cooling activated carbon as shown in the figure.

  In the case where the pulverizer 30 can be installed in the vicinity of the dispensing fixed quantity supply device 44 or in the vicinity of the storage tank 41, the pneumatic transportation facility is provided for at least one of the pulverized product supply path 42 and the pulverized product return path 43. It can be omitted and connected directly, or other mechanical transfer equipment can be used. For example, when the pulverizer 30 can be installed in the vicinity of the distribution quantitative supply device 44, the pneumatic transportation equipment (from the supply rotary valve 45r to the receiving tank 45t) and the pulverizer quantitative supply device 31 in the pulverized product supply path 42 are omitted. The first constant supply unit 44a may supply the pulverizer 30 directly (in other words, the first constant supply unit 44a may also serve as the pulverizer fixed supply unit 31).

  In the illustrated embodiment, the particle size measuring device 32 is provided in the pulverized product supply path 42 in order to perform the above-described pulverizer drive control, and the measurement result is transmitted to the control device 33. As indicated by the dotted line, power is transmitted from the pulverizer 30 to the control device 33, and the supply amount (supply mass per unit time) is supplied from the pulverizer quantitative supply device 31 as necessary. The control device 33 transmits a control signal for the pulverization drive source to the pulverizer 30.

  7 and 8 show an example of an operation flow of the activated carbon injection facility 40 described above. Now, when the crushing operation is started from the initial state where the raw coal is stored in the storage tank 41, the return air transport equipment (return fan 45f, the return rotary valve 45r), the crush equipment (for the crusher 30 and the crusher) The fixed amount feeder 31) starts operation in this order. These operations are stopped when the storage level of the receiving tank 45t is equal to or lower than a predetermined low level (LL), but are continued unless the storage level is low. The storage level of the receiving tank 45t can be measured by a known measuring device such as measuring the weight of the receiving tank 45t with a load cell.

  On the other hand, with the start of the pulverization operation, if the storage level of the receiving tank 45t is LL or less, the storage tank rotary valve 41r, the supply air transport equipment (supply fan 45f, supply rotary valve 45r), and the first fixed amount The supply unit 44a starts operation, and these operations are stopped when the storage level of the receiving tank 45t becomes equal to or higher than a predetermined high level (HL), but are continued as long as the level does not become high level. When the storage level of the receiving tank 45t exceeds LL, as described above, the pulverization facility and the return air transport facility start operation, and the activated carbon cut out from the storage tank 41 is the first fixed supply unit 44a, the supply air transport facility. Are sequentially supplied to the receiving tank 45t, and supplied to the pulverizer 30 from the receiving tank 45t, and the pulverized activated carbon discharged from the pulverizer 30 is returned to the storage tank 41 by the return air facility.

  On the other hand, in order to perform the above-described pulverization drive control, the controller 33 monitors whether or not the first fixed amount supply unit 44a is in operation with the start of the pulverization operation, and the first fixed amount supply unit 44a is in operation. Is measured by the particle size measuring device 32, and the actual pulverization energy measurement value of the pulverizer 30 is obtained, and the drive control of the drive source of the pulverizer 30 is performed so that the actual pulverization energy measurement value becomes the appropriate pulverization energy value. (If the drive source is a motor, increase or decrease the rotational speed of the motor). In addition, since an appropriate value of pulverization energy cannot be obtained at the initial stage of operation, drive control of the drive source of the pulverizer 30 is performed so that the initial setting value and the appropriate value of pulverization energy at the previous operation are obtained.

  The grinding operation is continued until the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 becomes the target particle size representative value. When the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 reaches the target particle size representative value, the pulverization operation is stopped. At this time, the pulverized activated carbon having the target particle size representative value is stored in the storage tank 41.

  When the activated carbon is injected in the water purification treatment, as shown in FIG. 8, the operation of the injection pump 46p is started, the dissolved water is supplied to the dissolution tank 47, and the driving water is supplied to the injection ejector 47e. The operation of 41r and the second constant supply unit 44b is started, and the pulverized activated carbon stored in the storage tank 41 is cut out and supplied to the dissolution tank 47 in a fixed amount. In the dissolution tank 47, activated carbon slurry having a predetermined concentration is produced, and this activated carbon slurry is supplied to the injection point.

  Rather than interposing the pulverizer 30 in the path for supplying water to the water purification process from the storage tank 41 as in the present equipment 40, a circulation path through which the activated carbon circulates the storage tank 41 and the pulverizer 30 is configured and circulated. When the activated carbon is configured to be repeatedly pulverized and the configuration in which the pulverized activated carbon is supplied from the storage tank 41 to the purified water treatment, the pulverizer 30 is installed separately from the storage tank 41 and the supply system for the purified water treatment. Therefore, it is easy to secure the installation space of the pulverizer 30 and the interlocking with the basic equipment, and the application to the existing equipment becomes easy. In particular, as in this example, it is preferable to transfer activated carbon by pneumatic transportation because the pulverizer 30 can be installed far away from the storage system 41 and the supply system for water purification treatment. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This facility 40 is suitable for the case where on-site pulverization is added to an existing facility having only one activated carbon storage tank without adding a storage tank. In particular, when the pulverized activated carbon is supplied from the storage tank 41 constituting the pulverization circulation system to the water purification treatment, not only the pulverization and the injection are repeated, but also simultaneously as necessary.

  On the other hand, the activated carbon injection facility 40 can perform the pulverization and the injection simultaneously when the injection is required before the pulverization to the target particle size is completed. However, in that case, since the injection is performed in a state where the pulverization is insufficient, the adsorption performance is reduced as compared with the case where the pulverized activated carbon having the target particle size is injected. In other words, the amount of pulverized activated carbon injected is insufficient. Therefore, according to the increase / decrease of the representative particle size measured by the particle size measuring device 32, the control device 33 increases / decreases the supply amount of the second constant supply unit 44a, which is equivalent to the case where the pulverized activated carbon having the target particle size is injected. It is desirable to correct the injection amount of the pulverized activated carbon so that the adsorption performance can be obtained.

  Such control can be performed, for example, according to the flow shown in FIG. That is, with the start of the injection operation, the controller 33 monitors whether or not the first fixed amount supply unit 44a is in operation, and when the first fixed amount supply unit 44a is in operation, the crushing operation is in progress. The correction required injection amount is calculated, and the supply amount of the second fixed amount supply unit 44b is increased or decreased so that the difference between the calculation result and the supply amount of the second fixed amount supply unit 44b is eliminated. When the first constant supply unit 44a is not in operation, there is no difference between the predetermined reference injection amount (necessary injection amount when the pulverized activated carbon of the target D50 is used) and the supply amount of the second constant supply unit 44b. In addition, the supply amount of the second constant supply unit 44b is increased or decreased.

The correction required injection amount may be determined as appropriate, but can be determined as follows, for example. That is, the particle size representative value is D50, and the degree of pulverization of the activated carbon to be crushed from the raw coal to the target is determined by the powder having a particle size equal to the D50 of the raw coal and the particle size equal to the target D50. When expressed in a mixing ratio with the powder, the following formula is obtained.
(Mixing ratio X)
Activated carbon D50 = target D50 x X% + initial coking coal D50 x (100-X%)
Further, assuming that the adsorption performance of the pulverized activated carbon pulverized to the target D50 when the adsorption performance of the initial raw coal is 1, the performance magnification is expressed by the following equation. Here, the adsorption performance coefficient α is obtained by conducting an adsorption performance test of the initial raw coal and pulverized activated carbon with respect to a predetermined adsorption target substance. It is expressed as a ratio. When obtaining the adsorption performance coefficient α, as long as the same adsorption performance test is performed on both the initial raw coal and the pulverized activated carbon, the type and test method of the adsorption target substance are not particularly limited. It is preferable to use a general adsorption performance value (for example, 2-MIB value, phenol value, ABS value, methylene blue decolorizing power) as a performance index. The test method for obtaining these adsorption performance values may be an original method or a standardized method. As an example of the latter, the test method described in JWWA K113: 2005 which is the Japan Water Works Association standard regarding the powder activated carbon for water supply can be illustrated. When the adsorption performance value is such that the smaller the value is, such as the 2-MIB value, the adsorption performance coefficient α is calculated with the reciprocal as the adsorption performance value.
(Performance magnification)
Performance magnification = α × X% + 1.0 × (100 – X%)
Therefore, the corrected injection amount corrected with the performance magnification taken into account can be calculated by the following equation.
(Injection amount Y after correction)
Y = reference injection amount ÷ performance magnification

  In this equipment 40, as the pulverizer 30, a dry pulverizer such as a dry bead mill and a jet mill is preferable, and among them, a dry bead mill is particularly preferable in that a sharp particle size distribution can be obtained by a single pulverization treatment. In addition, as various quantitative feeders and quantitative feeders including the pulverizer quantitative feeder 31, known ones such as the above-described measuring tank weight loss control method and the cut-out weight control method can be used without particular limitation. it can.

<Example 2 of activated carbon injection equipment>
FIG. 9 shows another dry powder activated carbon injection facility 50. The equipment 50 includes a pulverized product storage tank 51 for storing pulverized activated carbon, an injection product storage tank 54 for storing pulverized activated carbon pulverized to a target particle size, and a pulverized activated carbon stored in the pulverized product storage tank 51. The pulverized activated carbon pulverized by the pulverizer 30 and the pulverized activated carbon pulverized by the pulverizer 30 are selectively returned to the pulverized product storage tank 51 or the injected product storage tank 54. The pulverized activated carbon stored in the injected product storage tank 54 is supplied to the purified water treatment including the product return path 53.

  The illustrated embodiment will be described in more detail. In the pulverized product storage tank 51, dry powder raw coal fed by a jet pack car JC or the like is supplied and stored via the raw coal supply pipe 51i. In the illustrated embodiment, the dry powder raw coal fed by the jet pack vehicle JC or the like can be supplied to the injected product storage tank 54 via the raw coal supply pipe 54i. It is good also as a structure which supplies raw coal only to the storage tank 51. FIG. Coking coal stored in the pulverized product storage tank 51 is cut out via a damper 51d and a supply rotary valve 55r, supplied to a supply ejector 55e, and pulverized by air supplied from a supply blower 55f. After being supplied to a receiving tank 55t installed in the vicinity of 30 and temporarily stored, it is cut out by the pulverizer quantitative supply device 31 and supplied to the pulverizer 30 in a fixed amount.

  In the illustrated embodiment, the pulverized product return path 53 extending from the pulverizer 30 to the pulverized product storage tank 51 and the injected product storage tank 54 is also constituted by pneumatic transportation equipment. That is, the pulverized activated carbon discharged from the pulverizer 30 is supplied to the hopper 56h, then cut out by the return rotary valve 56r, supplied to the return ejector 56e, and returned by the air supplied from the return blower 56f. It is selectively returned to the pulverized product storage tank 51 or the injected product storage tank 54 via the pipe 56p. The return pipe 56p of the present facility 50 branches from the common part on the ejector side to the two paths from this common part, one of which is connected to the pulverized product storage tank 51 and the other connected to the injected product storage tank 54. And an opening / closing valve v2 is provided on the downstream side of the branch point. By selectively opening / closing the opening / closing valve v2, either the crushed product storage tank 51 or the injected product storage tank 54 is provided. It can only be selected and supplied. In addition, the return pipe 56p of this facility example 50 is joined to the raw coal supply pipes 51i and 54i, and on-off valves v1 and v2 are provided on the upstream side from the junction point, and the on-off valves v1 and v2 are selected. By opening and closing automatically, supply of raw coal to the storage tanks 51 and 54 and return of pulverized activated carbon can be selected.

  The pulverized activated carbon stored in the infusion product storage tank 51 is cut out via the damper 54d and the infusion product rotary valve 54r and supplied to the injecting quantitative feeder 54f, and the activated carbon to be cut out by the injecting quantitative feeder 54f is A fixed amount of activated carbon slurry is continuously supplied to the dissolution tank 57 with a stirrer and mixed with the dissolution water separately supplied at a constant flow rate from the on-site feed water SW in the dissolution tank 57. The slurry that overflows at a constant flow rate from 57 to the injection ejector 57e is supplied to the injection ejector 57e, and is supplied to the injection point AP together with the drive water supplied separately at a constant flow rate from the in-situ water supply SW by the injection pump 57p. . A method for supplying activated carbon stored in the injection storage tank 54 to the purified water treatment such as supplying slurry from the dissolution tank 57 to the injection point AP using a pump instead of the injection ejector 57e is particularly limited. It is not a thing.

  When the pulverizer 30 can be installed in the vicinity of the pulverized product storage tank 51, at least one of the pulverized product supply path 52 and the pulverized product supply path 53 may be directly connected by omitting the air transportation facility, Other mechanical transfer equipment can be used. For example, the pneumatic transportation equipment (from the supply ejector 55e to the receiving tank 55t) in the pulverized product supply path 52 is omitted, and the activated carbon cut out from the pulverized product storage tank 51 is directly supplied to the pulverizer quantitative supply device 31; It can also be set as the structure supplied to the grinder 30. FIG.

  In the illustrated embodiment, the particle size measuring device 32 is provided in the pulverized product supply path 52 in order to perform the above-described drive control of the pulverizer 30, and the measurement result is transmitted to the control device 33. . As indicated by the dotted line, power is transmitted from the pulverizer 30 to the control device 33, and the supply amount (supply mass per unit time) is supplied from the pulverizer quantitative supply device 31 as necessary. The control device 33 transmits a control signal for the pulverization drive source to the pulverizer 30.

  The activated carbon injection facility described above can be operated as follows. That is, when the pulverization operation is started from the initial state where the raw coal is stored in the pulverized product storage tank 51, the return air transport facility (return fan 56f, the return rotary valve 56r), the pulverization facility (pulverizer 3). The pulverizer quantitative feeder 31) starts operation in this order. These operations are stopped when the storage level of the receiving tank 55t is equal to or lower than a predetermined low level (LL), but are continued unless the storage level is low. The

  On the other hand, when the storage level of the receiving tank 55t is LL or less with the start of the pulverization operation, the supply air transport equipment (supply fan 55f, supply rotary valve 55r) starts operation, and these operations are received. When the storage level of the tank 55t becomes equal to or higher than a predetermined high level (HL), the tank 55t is stopped. When the storage level of the receiving tank 55t exceeds LL, as described above, the pulverization facility and the return air transport facility start operation, and the activated carbon cut out from the pulverized product storage tank 51 is received via the supply air transport facility. While being sequentially supplied to the tank 55t, the pulverized activated carbon supplied from the receiving tank 55t to the pulverizer 30 and discharged from the pulverizer is returned to the pulverized product storage tank 51 by the return air equipment.

  The grinding operation is continued until the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 becomes the target particle size representative value. When the representative particle size of the activated carbon measured by the particle size measuring device 32 reaches the target particle size representative value (or the predetermined particle size representative value that reaches the target particle size representative value in one pulverization), the return pipe 56p By switching the on-off valve v2, the pulverized activated carbon discharged from the pulverizer 30 is returned to the injected product storage tank 54 by the return air equipment. As a result, the pulverized activated carbon having the target particle size representative value is stored in the injected product storage tank 54.

  When the activated carbon is injected in the water purification treatment, the operation of the injection pump 56p is started, the dissolved water is supplied to the dissolution tank 57, and the driving water is supplied to the injection ejector 57e, and the injection product rotary valve 54r and the injection quantitative feeder The operation of 54 f is started, and the pulverized activated carbon stored in the injected product storage tank 54 is cut out and supplied to the dissolution tank 57 in a fixed amount. In the dissolution tank 57, activated carbon slurry having a predetermined concentration is manufactured, and this activated carbon slurry is supplied to the injection point AP.

  Instead of interposing the pulverizer 30 in the path for supplying the purified water from the injected product storage tank 54 as in the present facility 50, a circulation path through which the activated carbon circulates the pulverized product storage tank 51 and the pulverizer 30 is provided. The pulverized activated carbon pulverized to the target particle size is stored in the injected product storage tank 54, and the pulverized activated carbon is supplied from the injected product storage tank 54 to the purified water treatment. By adopting the supply configuration, the crusher 30 can be installed separately from the supply systems for the storage tanks 51 and 54 and the water purification treatment, so that the installation space for the crusher 30 can be secured and linked with the basic equipment. Securement becomes easy, and application to existing facilities becomes easy. In particular, as in this example, it is preferable to transfer activated carbon by pneumatic transportation because the pulverizer 30 can be installed far away from the storage tanks 51 and 54 and the supply system for water purification treatment. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This facility 50 is suitable for the case where on-site grinding is added to an existing facility including only one activated carbon storage tank (an additional storage tank is required) or an existing facility including a plurality of storage tanks. In particular, since the pulverized product storage tank 51 and the injected product storage tank 54 are provided separately, and the pulverization system and the injection system are independent, pulverization and injection can be performed simultaneously, and the injection amount can be reduced. As long as the pulverization amount is not exceeded, the pulverized activated carbon having the target particle size can be manufactured and injected substantially continuously, so that the shortage of injected products and the reduction in adsorption performance are unlikely to occur.

  In the facility 50 of the second example, similarly to the facility 40 of the first example, the pulverization drive control based on the measured pulverization energy value and the appropriate pulverization energy value can be performed. Moreover, also in the installation of this Example 2, activated carbon injection | pouring with respect to a grinding | pulverization and a water purification process can be performed simultaneously, and the above-mentioned injection | pouring amount correction | amendment can also be performed in that case. In addition, within the scope of the basic configuration of Example 2, the same changes as in Example 1 can be made. In addition, since the same reference numerals are used for the same configurations as in Example 1, the description thereof is omitted.

<Example 3 of activated carbon injection equipment>
FIG. 10 shows another dry powder activated carbon injection facility 60 in which almost the same facilities as those of Example 1 are arranged in parallel, and most of the pulverization facility and the air transportation facility are used in common. That is, the facility 60 includes a first storage tank 61 that stores activated carbon, a first pulverized product supply path 62 that supplies the activated carbon stored in the first storage tank 61 to the pulverizer 30, and activated carbon. A second storage tank 70 that stores the activated carbon, a second pulverized product supply path 72 that supplies the activated carbon stored in the second storage tank 70 to the pulverizer 30, and pulverized activated carbon pulverized by the pulverizer 30 The activated carbon stored in the first storage tank 61 or the second storage tank 71 is stored in the first storage tank 61 or the second storage tank 72. The activated carbon used is selectively supplied to the water purification treatment.

  If it demonstrates in detail about the form of illustration, in the 1st storage tank 61, the dry powder raw coal carried in by the jet pack car JC etc. will be supplied via the raw coal supply piping 61i, and will be stored. The activated carbon stored in the first storage tank 61 is cut out via the damper 61d and the first storage tank rotary valve 61r, and supplied to the first switching machine 64 through the first storage tank quantitative supply device 61f. It has become. The first switching machine 64 is not particularly limited as long as the supply to the two systems can be switched. The illustrated first switching machine 64 includes a supply hopper 64h on one end side in the longitudinal direction of the screw shaft in the casing, and includes an injection system discharge port 64a and a pulverization system discharge port 64b at intervals on the other end side. A screw feeder that moves in an upward gradient toward the side, and is provided with on-off valves v3 and v4 on the outlet side of the respective discharge ports 64a and 64b, and selectively opens and closes the on-off valves v3 and v4. Can be switched. The part from the crushing system discharge port 64b of the 1st switching machine 64 in the 1st to-be-ground product supply path 62 to the crusher 30 is comprised by the pneumatic transport equipment in the illustration form. That is, the activated carbon discharged from the crushing system discharge port 64b is supplied to the first supply hopper 65h, and the activated carbon in the first supply hopper 65h is cut out by the first supply rotary valve 65r and supplied to the first supply ejector 65e. Then, the air supplied from the supply blower 65f is supplied to the receiving tank 65t installed in the vicinity of the pulverizer 30 and temporarily stored, and then cut out by the pulverizer quantitative supply device 31 to be pulverized. 30 is supplied in a fixed amount. On the other hand, the activated carbon discharged from the injection system discharge port 64a is quantitatively supplied to the first dissolution tank 67 with a stirrer, and is separately supplied from the in-situ water supply SW to the first dissolution tank 67 at a constant flow rate by the injection pump 67p. A slurry of activated carbon having a predetermined concentration is continuously produced by mixing with dissolved water, and a slurry overflowing at a constant flow rate from the first dissolution tank 67 is supplied to the first injection ejector 67e, and the flow rate is supplied from the in-situ water supply SW to the injection pump 67p. It is supplied to the injection point AP together with a constant and separately supplied drive water.

  The same applies to the second storage tank side. That is, in the second storage tank 71, the dry powder raw coal carried in the jet pack car JC or the like is supplied and stored through the raw coal supply pipe 71i. The activated carbon stored in the second storage tank 71 is cut out via the damper 71d and the second storage tank rotary valve 71r, and supplied to the second switch 74 through the second storage tank quantitative supply unit 71f. It has become. The second switching machine 74 is not particularly limited as long as the supply to the two systems can be switched. The illustrated second switching machine 74 includes a supply hopper 74h on one end side in the longitudinal direction of the screw shaft in the casing, and includes an injection system discharge port 74a and a pulverization system discharge port 74b with a gap on the other end side. A screw feeder that moves in an upward gradient toward the side, and is provided with on-off valves v3 and v4 on the outlet side of the respective discharge ports 74a and 74b, and selectively opens and closes the on-off valves v3 and v4. Can be switched. The part from the crushing system discharge port 74b of the 2nd switching machine 74 in the 2nd to-be-ground product supply path 72 to the grinder 30 is comprised by the pneumatic transport equipment in the illustration form. That is, the activated carbon discharged from the crushing system outlet 74b is supplied to the second supply hopper 75h, and the activated carbon in the second supply hopper 75h is cut out by the second supply rotary valve 75r and supplied to the second supply ejector 75e. Then, the air supplied from the supply blower 65f is supplied to the receiving tank 65t installed in the vicinity of the pulverizer 30 and temporarily stored, and then cut out by the pulverizer quantitative supply device 31 to be pulverized. 30 is supplied in a fixed amount. On the other hand, the activated carbon discharged from the injection system discharge port 74a is quantitatively supplied to the second dissolution tank 77 with a stirrer, and is separately supplied from the in-situ water supply SW to the constant flow rate by the injection pump 67p in the second dissolution tank 77. A slurry of activated carbon having a predetermined concentration is continuously produced by mixing with dissolved water, and a slurry overflowing at a constant flow rate from the second dissolution tank 77 is supplied to the second injection ejector 77e, and the flow rate is supplied from the in-situ water supply SW to the injection pump 67p. It is supplied to the injection point AP together with a constant and separately supplied drive water. In the illustrated embodiment, a single injection is used to commonly use the injection pump for the first dissolution tank 67 and the first injection ejector 67e and the injection pump for the second dissolution tank 77 and the second injection ejector 77e. The piping on the delivery side of the pump 67p is branched, and on-off valves v5 and v6 are provided on the downstream side of the branch point. By switching the on-off valves v5 and v6, the dissolved water for one of the dissolution tanks and the injection ejector The drive water supply can be selected.

  In the illustrated form, the pulverized product return path 63 extending from the pulverizer 30 to the first storage tank 61 and the second storage tank 71 is also constituted by pneumatic transportation equipment. That is, the pulverized activated carbon discharged from the pulverizer 30 is supplied to the hopper 66h, cut out by the return rotary valve 66r, supplied to the return ejector 66e, and returned by the air supplied from the return blower 66f. It is selectively returned to the first storage tank 61 or the second storage tank 71 via the pipe 66p. The return pipe 66p of the present facility 60 is a common part on the ejector side and a part branched from this common part into two paths, one of which is connected to the first storage tank 61 and the other is connected to the second storage tank 71. And an open / close valve v2 is provided on the downstream side of the branch point. By selectively opening and closing the open / close valve v2, only one of the first storage tank 61 and the second storage tank 71 is selected. It can be supplied. Further, the return pipe 66p of the present facility example 60 is joined to the raw coal supply pipes 61i and 71i, and on-off valves v1 and v2 are provided on the upstream side from the junction point, and the on-off valves v1 and v2 are selected. By opening and closing automatically, the supply of raw coal to the first storage tank 61 and the second storage tank 71 and the return of the pulverized activated carbon can be selected.

  When the crusher 30 can be installed in the vicinity of at least one of the first switching machine 64 and the second switching machine 74, or when it can be installed in the vicinity of at least one of the first storage tank 61 and the second storage tank 71, crushing Between the machine 30 and nearby equipment, the pneumatic transportation equipment can be omitted and directly connected, or other mechanical transfer equipment can be used.

  In the illustrated embodiment, in order to perform the above-described pulverizer drive control, the first pulverized product supply path 62 and the second pulverized product supply path 72 are joined to one pipe on the way, and more than this joining point. A particle size measuring device 32 is provided in the common pipe on the downstream side, and the measurement result is transmitted to the control device 33. As indicated by the dotted line, power is transmitted from the pulverizer 30 to the control device 33, and the supply amount (supply mass per unit time) is supplied from the pulverizer quantitative supply device 31 as necessary. The control device 33 transmits a control signal for the pulverization drive source to the pulverizer 30.

  The activated carbon injection facility 60 described above has a circulation path in which activated carbon circulates in the first storage tank 61 and the pulverizer 30 and a circulation path in which activated carbon circulates in the second storage tank 71 and the pulverizer 30 as follows. By alternately using for pulverization, pulverized activated carbon in the storage tank after pulverization can be used for injection. For example, when the pulverization operation is started from the initial state where the raw coal is stored in the first storage tank 61, the return air transport facility (return fan 66f, return rotary valve 66r), pulverization facility (pulverizer 30, The pulverizer quantitative feeder 31) starts operation in this order. These operations are stopped when the storage level of the receiving tank 65t is equal to or lower than a predetermined low level (LL), but are continued unless the storage level is low. .

  On the other hand, when the storage level of the receiving tank 65t is LL or less with the start of the pulverization operation, the first storage tank rotary valve 61r, the first storage tank quantitative supply device 61f, the first switching device 64, and the supply pneumatic transport The equipment (supply fan 65f, supply rotary valve 65r) starts operation, and the on-off valve v3 is opened and the on-off valve v4 is closed so that the first switching machine 64 discharges to the crushing system discharge port 64b. These operations are stopped when the storage level of the receiving tank 65t becomes equal to or higher than a predetermined high level (HL), but are continued as long as the level does not become high. When the storage level of the receiving tank 65t exceeds the low level, as described above, the pulverization facility and the return air transport facility start operation, and the activated carbon cut out from the first storage tank 61 is received via the supply air transport facility. While being sequentially supplied to the tank 65t, the pulverized activated carbon supplied from the receiving tank 65t to the pulverizer 30 and discharged from the pulverizer 30 is returned to the first storage tank 61 by the return air facility. The grinding operation is continued until the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 becomes the target particle size representative value. As a result, the first storage tank 61 stores the pulverized activated carbon having the target particle size representative value.

  Next, when the raw coal is supplied to the second storage tank 71, or when the raw coal is stored in the second storage tank 71 in advance, as in the case of the first storage tank 61, the second storage tank 71 and pulverization are performed. The activated carbon is circulated and pulverized with the machine 30. That is, the return pneumatic transport equipment (return fan 66f, return rotary valve 66r) and the grinding equipment (grinding machine 30, fixed quantity feeder for grinding machine 31) start operation in this order. If the storage level of 65t is equal to or lower than a predetermined low level (LL), the operation stops, but continues unless the storage level is low. With the start of the pulverization operation, when the storage level of the receiving tank 65t is LL or less, the second storage tank rotary valve 71r, the second storage tank fixed amount supply device 71f, the second switching device 74, and the supply air transport facility ( The supply fan 65f and the supply rotary valve 75r) start operation, and the on-off valve v3 is opened and the on-off valve v4 is closed so that the second switching device 74 discharges to the crushing system discharge port 74b. These operations are stopped when the storage level of the receiving tank 65t becomes equal to or higher than a predetermined high level (HL), but are continued as long as the level does not become high. When the storage level of the receiving tank 65t exceeds the low level, as described above, the pulverization facility and the return air transport facility start operation, and the activated carbon cut out from the second storage tank 71 is received via the supply air transport facility. While being sequentially supplied to the tank 65t, the pulverized activated carbon supplied from the receiving tank 65t to the pulverizer 30 and discharged from the pulverizer 30 is returned to the second storage tank 71 by the return air facility. The grinding operation is continued until the particle size representative value of the activated carbon to be crushed measured by the particle size measuring device 32 becomes the target particle size representative value. As a result, the second storage tank 71 stores the pulverized activated carbon having the target particle size representative value.

  On the other hand, when the activated carbon is injected in the water purification treatment, the injection is performed from any one of the first storage tank 61 and the second storage tank 71 that stores the activated carbon pulverized to the target particle size representative value. For example, if activated carbon pulverized to the target particle size representative value is stored in the first storage tank 61 and circulation pulverization is performed between the second storage tank 71 and the pulverizer 30, the first dissolution tank 67 is now stored. The operation of the infusion pump 67p leading to is started, the on-off valve v5 is opened, the on-off valve v6 is closed, dissolved water is supplied to the first dissolving tank 67, and driving water is supplied to the first injecting ejector 67e. The operation of the first storage tank rotary valve 61r, the first storage tank quantitative supply device 61f, and the first switching device 64 is started, and the on-off valve v3 is closed and opened so that the first switching device 64 discharges to the injection system discharge port 64a. Switch valve v4 to open. Thereby, the pulverized activated carbon stored in the first storage tank 61 is cut out and supplied to the first dissolution tank 67 in a fixed amount. In the first dissolution tank 67, activated carbon slurry having a predetermined concentration is manufactured, and this activated carbon slurry is supplied to the injection point AP.

  When the pulverized activated carbon in the first storage tank 61 has been used up, the on-off valves v3 and v4 are switched so that the first switching machine 64 discharges to the pulverization system outlet, and the first storage tank 61 side is switched to the pulverization operation. At this time, the activated carbon pulverized to the target particle size representative value is stored in the second storage tank 71, and when the injection is continued, the on-off valve v5 is closed and the on-off valve v6 is switched to open and dissolved. While supplying water to the 2nd dissolution tank 77 and driving water to the 2nd injection ejector 77e, operation of the 2nd storage tank rotary valve 71r, the 2nd storage tank fixed quantity supply machine 71f, and the 2nd change machine 74 is carried out, respectively. The on-off valves v3 and v4 are switched so that the second switching device 74 discharges to the injection system discharge port 74a. Thereby, the pulverized activated carbon stored in the second storage tank 71 is cut out and supplied to the second dissolution tank 77 in a fixed amount. In the second dissolution tank 77, activated carbon slurry having a predetermined concentration is produced, and this activated carbon slurry is supplied to the injection point.

  The pulverization / injection switching of the first storage tank 61 and the second storage tank 71 can be performed at any time such as during the injection in which activated carbon remains sufficiently in the storage tank in use, at the time of equipment failure, during equipment maintenance, etc. You may go on.

  Rather than interposing a pulverizer in the path for supplying water from the storage tank to the water purification treatment as in the present facility 60, the activated carbon circulates through the first storage tank 61 and the pulverizer 30, and the activated carbon is the second. The storage tank 71 and a circulation path that circulates through the pulverizer 30 are configured, and the pulverization can be repeatedly performed on each of the circulating activated carbon, and the water purification process is selected from the first storage tank 61 or the second storage tank 71. Since the pulverized activated carbon is supplied, the pulverizer 30 can be installed separately from the supply system for the first storage tank 61 and the second storage tank 71 and the water purification process. It is easy to secure the installation space and interlock with the basic equipment, making it easy to apply to existing equipment. Further, since the pulverization can be repeated, even if the difference between the particle size of the raw coal and the target particle size of the pulverized activated carbon is large, the pulverized activated carbon having the target particle size can be manufactured and injected. This facility 60 is suitable when adding on-site crushing to an existing facility having only one activated carbon storage tank (an additional storage tank is required) or an existing facility having a plurality of storage tanks. In particular, since two systems of activated carbon circulation paths for pulverization are provided independently, pulverization and injection can be performed simultaneously by using one for pulverization and the other for injection. As long as the amount does not exceed the pulverization amount, pulverized activated carbon having the target particle size can be manufactured and injected substantially continuously, so that the shortage of injection products and the reduction in adsorption performance are unlikely to occur. Furthermore, a pulverization facility (a pulverizer 30 and a pulverizer quantitative supply device 31) and the like can be individually provided in each of the circulation paths of the activated carbon for pulverization, but in this facility 60, only one pulverizer 30 is sufficient. Therefore, there is an advantage that the installation space is small for the device configuration.

In the facility 60 of the third example, similarly to the facility of the first example, pulverization drive control based on the measured pulverization energy value and the appropriate pulverization energy value can be performed. Moreover, also in the installation of this Example 3 , activated carbon injection | pouring with respect to a grinding | pulverization and a water purification process can be performed simultaneously, and the above-mentioned injection | pouring amount correction | amendment can also be performed in that case. In addition, within the scope of the basic configuration of Example 3, the same changes as in Example 1 can be made. In addition, since the same reference numerals are used for the same configurations as in Example 1, the description thereof is omitted.

<Others>
In the above embodiment, circulation pulverization is possible, but circulation pulverization is not necessary if the target particle size is reached by only one pulverization without circulation.
-Although the said embodiment is an application example to dry powder activated carbon injection equipment, this invention can also be applied to wet powder activated carbon injection equipment.

  The present invention is used to purify water to be treated such as river water and various industrial water with activated carbon.

  AP: injection point, C1: activated carbon to be pulverized, C2: pulverized activated carbon, CW: treated water, DC: dry powder activated carbon, RW: raw water, SW: water supply, SW: in-site water supply, WC: wet powder activated carbon, bg: bug Filter, pg ... Cooling air purge, v1, v2 ... Open / close valve, v3, v4 ... Open / close valve, v5, v6 ... Open / close valve, 1 ... Mixing pond, 2 ... Flock formation pond, 3 ... Sedimentation basin, 4 ... Filtration basin, 10 DESCRIPTION OF SYMBOLS ... Dry powder activated carbon injection equipment, 11 ... Activated carbon storage tank, 12 ... Vibration ejector, 13 ... Rotary valve, 14, 18 ... Powder fixed quantity supply machine, 15 ... Dissolution tank, 16 ... Pump, 17 ... Ejector, 20 ... Wet powder Activated carbon injection equipment, 21 ... dissolution tank, 22 ... injection pump, 30 ... pulverizer, 31 ... quantitative supply device for pulverizer, 32 ... particle size measuring device, 33 ... control device, 41 ... storage tank, 41d ... damper, 41 ... coking coal supply pipe, 41r ... storage tank rotary valve, 42 ... crushed product supply path, 43 ... crushed product return path, 44 ... distributed metering feeder, 44a ... first metering supply unit, 44b ... second metering supply unit 44h ... Hopper, 45e ... Ejector for supply, 45f ... Blower for supply, 45r ... Rotary valve for supply, 45t ... Receiving tank, 46e ... Ejector for return, 46f ... Blower for return, 46h ... Hopper, 46p ... Return pipe, 46r ... Rotary valve for return, 47 ... Dissolution tank, 47e ... Injection ejector, 47p ... Injection pump, 50 ... Dry powder activated carbon injection equipment, 51 ... Shattered article storage tank, 51d ... Damper, 51i ... Coal supply pipe, 52 ... pulverized product supply path, 53 ... pulverized product return path, 54 ... injection product storage tank, 54d ... damper, 54f ... injection quantitative meter, 54r ... injection product low Tally valve, 55e ... ejector for supply, 55f ... blower for supply, 55r ... rotary valve for supply, 55t ... receiving tank, 56e ... ejector for return, 56f ... blower for return, 56h ... hopper, 56p ... return pipe, 56r ... Rotary valve for return, 57 ... Dissolution tank, 57e ... Injection ejector, 57p ... Injection pump, 60 ... Dry powder activated carbon injection equipment, 61 ... First storage tank, 61d ... Damper, 61f ... First storage tank quantitative supply machine, 61i ... coking coal supply pipe, 61r ... first storage tank rotary valve, 62 ... first pulverized product supply path, 63 ... crushed product return path, 64 ... first switching machine, 64a ... injection system discharge port, 64b ... pulverization system Discharge port, 64h ... supply hopper, 65e ... first supply ejector, 65f ... supply blower, 65h ... first supply hopper, 65r ... first supply rotor -Valve, 65t ... receiving tank, 66e ... return ejector, 66h ... hopper, 66p ... return pipe, 66r ... return rotary valve, 67 ... first dissolution tank, 67e ... first injection ejector, 67p ... injection pump, 70 ... 2nd storage tank, 71d ... damper, 71f ... 2nd storage tank fixed quantity feeder, 71i ... coking coal supply pipe, 71r ... 2nd storage tank rotary valve, 72 ... 2nd to-be-ground product supply path, 74 ... 2nd switching 74a ... injection system discharge port, 74b ... grinding system discharge port, 74h ... feed hopper, 75e ... second supply ejector, 75h ... second supply hopper, 75r ... second supply rotary valve, 77 ... second melting tank 77e ... Second injection ejector.

Claims (10)

In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
An activated carbon reservoir,
The pulverized product supply path for supplying the activated carbon stored in the storage tank to the pulverizer,
Including a pulverized product return path for returning the pulverized activated carbon pulverized by the pulverizer to the storage tank;
The activated carbon stored in the storage tank is configured to supply the purified water treatment.
Powder activated carbon injection equipment characterized by that. Having a dissolution tank for continuously producing a slurry of activated carbon having a predetermined concentration by mixing the pulverized activated carbon and separately dissolved water supplied at a constant flow rate;
Having an injectable product quantitative supply machine for continuously supplying the activated carbon stored in the storage tank to the dissolution tank;
The slurry continuously produced in the dissolution tank is configured to supply to the water purification treatment,
In the pulverized product supply path or pulverized product return path, it has a particle size measuring device for measuring the representative particle size of activated carbon,
In accordance with the increase or decrease of the particle size representative value measured by the particle size measuring device, it has a control device that increases or decreases the supply amount of the infusion product quantitative supply machine,
The powdered activated carbon injection facility according to claim 1.   A part or all of a path from the storage tank to the pulverizer and a part or all of the pulverized product return path in the pulverized product supply path transfer activated carbon by pneumatic transportation. The powdered activated carbon injection facility according to 1 or 2. In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
To-be-ground product storage tank for storing to-be-ground activated carbon,
An infusion storage tank for storing pulverized activated carbon pulverized to a target particle size;
A pulverized product supply path for supplying the pulverized activated carbon stored in the pulverized product storage tank to the pulverizer,
The pulverized activated carbon pulverized by the pulverizer includes a pulverized product return path for selectively returning the pulverized activated carbon storage tank or the injected product storage tank,
The pulverized activated carbon stored in the infusion product storage tank is configured to supply the purified water treatment.
Powder activated carbon injection equipment characterized by that.   5. The powdered activated carbon injection facility according to claim 4, wherein a part or all of the pulverized product supply path and a part or all of the pulverized product return path transport activated carbon by pneumatic transportation. In the powdered activated carbon injection facility, which pulverized activated carbon is manufactured by pulverizing powdered raw coal with a pulverizer installed in the water purification plant, and this pulverized activated carbon is supplied to the water purification treatment,
A first storage tank for storing activated carbon;
A first pulverized product supply path for supplying the activated carbon stored in the first storage tank to the pulverizer;
A second storage tank for storing activated carbon;
A second pulverized product supply path for supplying activated carbon stored in the second storage tank to the pulverizer;
Pulverized activated carbon pulverized by the pulverizer, including a pulverized product return path for selectively returning the pulverized activated carbon to the first storage tank or the second storage tank,
Activated carbon stored in the first storage tank, or activated carbon stored in the second storage tank is configured to selectively supply the purified water treatment.
Powder activated carbon injection equipment characterized by that.   Part or all of the first pulverized product supply path, part or all of the second pulverized product supply path, and part or all of the pulverized product return path transfer activated carbon by pneumatic transportation. The powdered activated carbon injection facility according to claim 6. In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
Activated carbon stored in an activated carbon storage tank is supplied to the pulverizer,
Return the pulverized activated carbon crushed by the pulverizer to the storage tank,
Supplying activated carbon stored in the storage tank to the water purification treatment,
A method for injecting powdered activated carbon. In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
Supplying activated carbon to be crushed stored in a pulverized product storage tank for storing activated carbon to be crushed, to the pulverizer;
The pulverized activated carbon that does not reach the target particle size pulverized by the pulverizer is returned to the pulverized product storage tank,
Supplying the pulverized activated carbon that has reached the target particle size pulverized by the pulverizer, to the injection storage tank,
Supply the pulverized activated carbon stored in the infusion product storage tank to the water purification treatment,
A method for injecting powdered activated carbon. In the powdered activated carbon injection method, pulverized activated carbon is produced by pulverizing powdered raw coal with a pulverizer installed in a water purification plant, and this pulverized activated carbon is supplied to the water purification treatment.
While selectively supplying activated carbon stored in one of the first storage tank and the second storage tank to the pulverizer,
Return the pulverized activated carbon crushed by the pulverizer to the one storage tank,
Selectively supplying activated carbon stored in the other storage tank of the first storage tank and the second storage tank to the water purification treatment;
A method for injecting powdered activated carbon.

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