KR101994904B1 - Apparatus for determining the amount of heavy metal immobilizing agent - Google Patents

Abstract

Provided is an apparatus for determining the amount of heavy metal immobilizing agent that can easily and at low cost of residual material. A weighing section 20 for weighing a predetermined amount of weighing material H2 from the fly ash H1 collected by the sampling section 10 and a weighing section 20 for weighing a predetermined amount of weighing material H2 from the picking section 10, (30) for eluting a predetermined amount of the weighing material (H2) in a solvent to obtain eluted water, and a control unit (30) for controlling the amount of the heavy metal immobilizing agent added to the fly ash (Remaining amount H3) (H1-H2) remaining in the weighing section 20 is set to a position different from the leaching section 30 (the flyash feed path 2) And the discharging portion 24 discharges the residual material H3 to the analytical / control unit 40 even when the amount of the heavy metal immobilizing agent added to the fly ash H has been determined by the analysis / control unit 40 Is an apparatus for determining the amount of heavy metal immobilizing agent added to the fly ash (H) discharged to a different site from the leaching section (30).

Description

Apparatus for determining the amount of heavy metal immobilizing agent

The present invention relates to an addition amount determining apparatus for determining an appropriate addition amount of a heavy metal immobilizing agent to fly ash to perform a treatment for detoxifying a heavy metal in fly ash.

Since the fly ash generated when the waste is incinerated contains a large amount of heavy metals, detoxification of heavy metals is necessary to dispose of fly ash. In order to render the heavy metals harmless, it is common to add heavy metal immobilizing agents to the collected fly ash, and to subject them to humidification kneading with a kneader. In this case, the nature (heavy metal content, etc.) of the fly ash varies greatly depending on the kind of the incineration product. Therefore, it is necessary to change the amount of the heavy metal immobilization agent added to the fly ash in accordance with the properties of the fly ash. Therefore, the addition amount of the heavy metal immobilizing agent is determined by determining the amount of the heavy metal immobilizing agent added by taking the fly ash at a predetermined timing and analyzing it.

An apparatus for determining the amount of a heavy metal immobilizing agent generally includes a weighing section for weighing a predetermined amount of fly ash from a fly ash supplied through a fly ash transport path and a weighing section for discharging a predetermined amount of fly ash into a solvent such as water, And an addition amount determining section for determining the amount of the heavy metal immobilizing agent to be added to the fly ash on the basis of the amount of the heavy metal contained in the leached water.

In Patent Document 1, after the amount of the heavy metal immobilizing agent to be added to the fly ash is determined by the addition amount determining unit, the remaining material remaining in the weighing unit is discharged into the leached water of the leaching unit and all of the fly ash A weighing material and a residual material) is discharged from the leaching section.

Japanese Patent Application Laid-Open No. 11-197628

However, according to the fly ash treatment method disclosed in Patent Document 1, since all of the fly ash supplied through the fly ash feed path is supplied to the leached portion, the concentration of fly ash in the leached water discharged from the leached portion becomes very high. For this reason, fly ash is liable to adhere to the leaching tank containing the eluted water, and the drain valve is blocked by fly ash or the drainage path is blocked by fly ash. As a result, it is necessary to treat the fly ash with a system other than a conventional fly ash treatment system, in which a large amount of water (washing water) It costs time and money.

As a result of intensive studies to solve the above problems, the inventors of the present invention have found that by discharging the remaining material to a place different from the dissolving portion, the remaining material can be treated like the ordinary flyash material without increasing the concentration of the flyash in the dissolving water of the dissolving portion. And the present invention has been accomplished. More specifically, the present invention provides the following.

(1) According to the present invention, there is provided a process for producing a fullerene-containing fly ash, comprising: a weighing unit for weighing a predetermined amount of fly ash from a flyash transfer path; a leaching unit for leaching the predetermined amount of flyash into a solvent to obtain leachate; An addition amount determining section for determining an amount of the heavy metal immobilizing agent to be added to the fly ash on the basis of the amount of the additive, and a discharge section for discharging the residue remaining in the weighing section to a place different from the leaching section, Wherein the residual material is discharged to a site other than the leaching site even when the amount of the heavy metal immobilizing agent to be added to the fly ash is determined by the crystal unit.

(2) In the present invention, the discharging portion is an adding amount determining device for heavy metal immobilizing agent described in (1), wherein the discharging portion discharges the residual material to the flywheel transfer path.

(3) Further, the present invention is characterized in that the addition amount determining section determines the addition amount of the heavy metal immobilizing agent by multiplying the flow rate of the fly ash in the flywheel feed path by the addition rate of the heavy metal immobilizing agent The amount of the heavy metal immobilizing agent is determined.

(4) In the present invention, it is preferable that the weighing section further comprises: a fly ash containing portion for containing fly ash; a feed portion for supplying the fly ash in the fly ash receiving portion; and a load weighing And a control section electrically connected to the supply section and the load metering section, wherein the control section includes: a vibration receiving section that receives vibration information of the flyash containing section; and a determination section that determines whether the vibration receiving section is receiving vibration reception information And a weight loss command means for transmitting a weight loss command signal to the load weight portion when it is determined by the vibration reception judgment means that it is not being received by the vibration reception judgment means The amount of the heavy metal immobilizing agent added in any one of (1) to (3) The device.

(5) According to the present invention, the control unit may further comprise: a drive unit that transmits a drive start command signal for instructing the start of drive of the supply unit when the weight loss command signal of the machine weight is transmitted by the weight loss command unit And a control unit for controlling the control unit so that the weight value acquired by the weight value acquiring unit from the load metering unit when the drive start command signal is transmitted by the drive start command unit, A weight value judging means for judging whether or not the weight value has been reached; and a weight value judging means for judging whether or not the weight value acquired by the weight value acquiring means has reached a predetermined weight value, A drive stop instruction means for transmitting a drive stop instruction signal for instructing stop of the supply portion Acquiring means for re-acquiring the weighing value in the load metering section when it is discriminated that the vibration is not being received by the vibration reception judging means; When it is determined that the metered value reacquired by the metered value reacquisition means has not reached the predetermined weighted value by the means for trial of the metered value by means of the metered value trial means for judging whether or not the weighted value has been reached When the weight value re-acquired by the weight value re-acquisition means is determined to have reached a predetermined weight value by means of the weight value trial means, the driving start re-instruction means for transmitting the drive start command signal again, And metering termination means for terminating the acquisition of the metering value by the metering value reacquisition means. The amount of the heavy metal immobilizing agent is determined.

(6) The present invention is also the apparatus for determining the amount of heavy metal immobilizing agent described in (4) or (5), wherein the supply unit is provided with a screw and an agitator disposed above the screw .

(7) According to the present invention, it is preferable that the leaching unit includes a leaching tank for containing the eluted water, a lid capable of closing the leaching tank, a flyash input port opened in a part of the lid, (4) to (6), further comprising a cover for covering a space between the cover and the inlet, wherein the cover is provided with drying means for blowing dry air, hot air or dry hot air into the inside thereof The amount of the heavy metal immobilizing agent is determined.

(8) According to the present invention, there is also provided a method of manufacturing an image forming apparatus, comprising the steps of: (a) (4) to (7), further comprising a sucking means for sucking out the heavy metal immobilizing agent.

(9) In the present invention, it is preferable that the weighing section has a fly ash receiving section for receiving the fly ash contained therein, and at least a part of the fly ash receiving member is in contact with the fly ash 1) to (8) above.

(10) The present invention also relates to the heavy metal immobilizing agent described in any one of (1) to (9), further comprising a collecting section for collecting a predetermined amount of fly ash from the fly ash transportation path and supplying the collected fraction to the weighing section. The addition amount determination device.

(11) The present invention is the addition amount determination device for heavy metal immobilizing agent described in (10), wherein at least a part of the member which comes into contact with the fly ash in the collecting part is subjected to fluorine resin processing.

(12) In the present invention, the collecting unit is an apparatus for determining the amount of heavy metal immobilizing agent described in (10) or (11), which includes drying means for blowing dry air, warm air or dry warm air into the inside.

(13) The present invention is also the apparatus for determining the amount of heavy metal immobilizing agent described in any one of (10) to (12), wherein the collecting unit further comprises a vibrator for swinging the collecting unit.

According to the present invention, it is possible to provide an apparatus for determining the amount of heavy metal immobilizing agent that can easily and at low cost of remaining material.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration diagram showing the configuration of a flyash material treatment apparatus including an apparatus for determining the amount of heavy metal immobilizing agent added; FIG.
Fig. 2 is a configuration diagram showing the configuration of the sampling section of the apparatus for determining the amount of heavy metal immobilizing agent. Fig.
3 is a configuration diagram showing a configuration of a weighing section of the apparatus for determining the amount of heavy metal immobilizing agent.
Fig. 4 (a) is a plan view showing the shape of the agitator when the hopper is viewed from above, and Fig. 4 (b) is a plan view of the agitator in the hopper of the weighing part And Fig.
5 is a schematic view for explaining the shape of the interior of the weighing part.
6 is a block diagram showing the configuration of the control unit.
7 is a flowchart for explaining an example of a weighing sequence.
Fig. 8 is an enlarged schematic diagram showing a part of the configuration of the elution portion.
Fig. 9 is a configuration diagram showing the configuration of another flyash material treatment apparatus. Fig.

Hereinafter, a specific embodiment of the present invention will be described in detail, but the present invention is not limited to the following embodiments, but can be carried out by appropriately modifying it within the scope of the object of the present invention.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration diagram showing the configuration of a flyash material treatment apparatus including an apparatus for determining the amount of heavy metal immobilizing agent 1 according to the present embodiment. FIG. As shown in FIG. 1, the apparatus includes a flyash conveying path 2 for conveying flyash H downward from a flyash silo not shown in the drawing, and a flyash conveying path 2 for collecting flyash H1 from the flyash conveying path 2. [ (3) for kneading a fly ash treatment liquid containing fly ash (H) and a heavy metal immobilizing agent, a kneader (3) for kneading the fly ash, And a drug infusion pump 5 for injecting a predetermined amount of the flyash treatment chemical solution from the flyash treatment chemical solution tank 4 into the kneader 3.

Generally, the fly ash H stored in the fly ash silo is supplied to the kneader 3 at a constant flow rate through the flyash conveying path 2 formed in a substantially cylindrical shape. To the fly ash H in the kneader 3, a predetermined amount of the fly ash treatment liquid is added from the fly ash treatment tank 4 through the infusion pump 5, as described later. Then, the flyash (H) and the flyash treatment chemical solution are humidified and kneaded by the kneader (3) and discharged sequentially from the kneader (3) in a state in which leaching of heavy metal in the flyash (H) is suppressed And then discarded.

On the other hand, since the properties (kind and content) of the heavy metal in the fly ash H vary depending on the type of the waste to be incinerated, it is necessary to change the amount of the heavy metal immobilizing agent added in the fly ash H. Therefore, the additive amount determination device 1 can collect a predetermined amount of fly ash H1 from the fly ash transport path 2 at a predetermined timing, and determine the amount of the heavy metal H to the fly ash H based on the analysis result of the fly ash H1 The appropriate amount of the immobilizing agent is determined.

≪ Addition amount determination device (1) >

Hereinafter, the addition quantity determination device 1 will be described in detail. As shown in Fig. 1, the addition amount determination apparatus 1 comprises a sampling section 10 for sampling a fly ash H1 from a fly ash transport path 2, A leaching section 30 for leaching the weighed material H2 weighed in the weighing section 20 into water in the leaching tank 31 to obtain leachate water, And an analysis and control unit (40) which is an addition amount determination unit that determines an addition amount of the heavy metal immobilizing agent to be added to the fly ash (H) based on the amount of the predetermined component.

[Collecting unit (10)]

Fig. 2 is a configuration diagram for explaining the configuration of the sampling section 10. Fig. 2, the collecting unit 10 includes a box-like retracting skin 11 attached to the side of the flyash conveying path 2 and a box-shaped retracting skin 11 attached to the retreating skin 11 Shaped guide portion 12 attached to the lower portion and guiding the fly ash H to the weighing portion 20, a cup 13 for collecting the fly ash H in the fly ash transport path 2, And a rotary actuator 15 attached in front of the air cylinder 14 and rotating the cup 13. The air cylinder 14 is provided with an air cylinder 14 for moving the air cylinder 14 into and out of the fly ash transport path 2 and retracting skin 11,

The collecting section 10 is configured such that the cup 13 is inserted into the position where the fly ash H falls freely in the fly ash transport path 2 by extending the air cylinder 14 and the fly ash H1 is collected in the cup 13 do. The collecting unit 10 is arranged so that the air cylinder 14 is shortened so that the cup 13 is positioned on the upper portion of the guide unit 12 and the rotary actuator 15 is rotated 180 degrees to move the cup 13 downward , And the fly ash H1 is introduced into the guide portion 12. The fly ash H1 that has been introduced into the guide portion 12 drops by gravitational force and falls into the weighing unit 20.

The inner wall of the guide portion 12 may be subjected to surface treatment with a material having good releasability, for example, fluororesin processing, from the viewpoint of preventing the flyash material H1 from sticking to the inner wall of the guide portion 12. [ A vibrator 16 may be provided on the outer wall of the guide portion 12 to prevent the fly ash H1 from sticking to the inner wall of the guide portion 12. [ The vibrator 16 can prevent the fly ash H1 from sticking to the inner wall of the guide portion 12 by vibrating the guide portion 12. [ In addition, from the viewpoint of preventing the fly ash H1 from sticking to the guide portion 12, a take-in port 17, which is drying means connected to the retracting skin 11, may be provided on the side of the retracting skin 11. Hot air or dry hot air A is blown into the retracted skin 11 through the inlet port 17 to fix the fly ash H1 or the fly ash H1 And it is possible to prevent the discharge port of the guide portion 12 from being clogged by the fly ash H1.

The vibration of the picking section 10 is transmitted to the weighing section 20 or the like via a flyash conveying path 2 so as not to scatter the flyash H at the connection section between the picking section 10 and the flysack conveying path 2, It is preferable not to be transmitted. For example, an opening through which the cup 13 and the rotary actuator 15 of the collecting section 10 pass is formed in the flyash conveying path 2, and the opening portion in the collecting section 10 and the flyash conveying path 2 (Bellows) or cloth made of resin that can be stretched.

[Weighing section 20]

Fig. 3 is a configuration diagram for explaining the configuration of the weighing unit 20. Fig. 3, the weighing section 20 includes a hopper section 21 which communicates with the collecting section 10 and is a fly ash receiving section for receiving the fly ash H1 from the collecting section 10, A load cell 22 serving as a load metering unit for measuring a load applied from the load cell 21 and a control unit 27 electrically connected to each member of the weighing unit 20. [

(Hopper portion 21)

The hopper section 21 is provided with a supply section 23 for supplying a part (weighing material H2) of the collected fly ash H1 to the leaching section 30 and a supply section 23 for discharging the fly ash from the collected fly ash H1 A discharge unit 24 as discharge means for discharging the residual material H3 (H1-H2) not supplied to the discharge port 30 to the elution unit 30 and a discharging unit 24 for discharging the flywheel 21 And an agitator (25) for agitating H1. From the viewpoint of preventing the fly ash H1 from sticking to the inner wall of the hopper portion 21, the inner wall of the hopper portion 21 is subjected to surface treatment with a releasable material, for example, fluorine resin processing It is also good.

(Load cell 22)

The load cell 22 measures the amount of the weighed material H2 supplied into the weighing vessel 31 by the feed screw 23b by measuring the load applied from the hopper unit 21 to the weight- ). The weight loss control formula by the load cell 22 is an excellent weighing method in that it is possible to control the constant flow rate with high accuracy and with a small error and also in that scattering of the flyash H1 is easily prevented. The height position of the load cell 22 is adjusted so that the discharge port of the supply nozzle 23a is located above the application tank 31. [

(Supply section 23)

The supply section 23 includes a supply nozzle 23a which is a substantially tubular flyash feed port extended from the hopper section 21 to the upper side of the supply tank 31 and a supply nozzle 23b extending from the hopper section 21 into the supply nozzle 23 A supply screw 23b, and a motor M1 for rotating the supply screw 23b. The motor M1 is driven at a predetermined timing in the feeder 23 so that the feed screw 23b is rotated forward at a constant speed for a predetermined time to feed the fly ash H1 from the picker 10, . A part of the flyash H1 that has been released from the collecting section 10 is supplied to the leaching section 30 through the feed nozzle 23a as a weight material H2.

(Discharge portion 24)

The discharge portion 24 includes an approximately cylindrical discharge nozzle 24a extending from the hopper portion 21 into the flyash transport path 2 and a discharge screw 24b extending from the hopper portion 21 into the discharge nozzle 24a 24b, and a motor M2 for rotating the discharge screw 24b. As described later, the motor M2 is driven at a predetermined timing in the discharge portion 24 so that the discharge screw 24b is rotated forward at a constant speed for a predetermined period of time to discharge the remaining material H3 remaining in the hopper portion 21 And discharged to the flyash conveying path (2). The remaining material H3 discharged to the flyash conveying path 2 is conveyed to the kneading machine 3 together with the flyash H. [

Since the amount of the weighing material H2 must be precisely weighed, it is preferable that the screw diameter of the supply screw 23b is small to some extent. On the other hand, among the fly ash H1 supplied into the hopper portion 21, the amount of the residual material H3 discharged to the outside is larger than the amount of the weight material H2. Therefore, in order to shorten the time required for discharge, it is preferable that the screw diameter of the discharge screw 24b is somewhat large.

In addition, it is preferable that the flyash (H) is not scattered at the connecting portion between the weighing unit (20) and the flyash conveying route (2). It is possible to form an opening through which the discharge nozzle 24a of the weighing unit 20 passes and to make a gap between the weighing unit 20 and the opening in the flyash conveying path 2 stretchable It may be blocked by resin bellows (bellows) or cloth.

Since the residual material H3 remaining in the hopper portion 21 is discharged to the outside (the flyash transfer path 2) by the discharge portion 24, the additive amount determination device 1 returns the flyash H1 again It is possible to prevent mixing of the new fly ash H and the previous fly ash H1 into the hopper portion 21 even if they are collected. As described later, since the residual material H3 can be treated in the same system as a conventional fly ash material processing system which is discharged into the fly ash transport path 2 and processes the fly ash H, it does not require time or cost.

The supply section 23 and the discharge section 24 are not limited to the screw feeder type such as the feed screw 23b and the discharge screw 24b described above and an auger feeder or the like may be employed. Among them, the powder can be continuously conveyed at a constant flow rate, and the conveying direction can be easily changed. Therefore, it is preferable that the supply unit 23 is a screw feeder.

Further, in the present embodiment, the description has been given of the structure in which the two screws including the feed screw 23b and the discharge screw 24b are provided. However, the function of the feed screw and the discharge screw in one screw may be combined. In this case, the direction of conveying the fly ash may be controlled by forward rotation or reverse rotation of one screw.

(The agitator 25)

The agitator 25 is a plate-like rotating member and is rotated by a motor M3. 4 (a) is a plan view showing the shape of the agitator when the hopper portion 21 is viewed from above, and FIG. 4 (b) is a plan view showing the change of the rotation of the agitator 25 in the hopper portion 21. FIG. Is a schematic diagram showing the change of the rotation of the agitator 25 in the agitator 21. As shown in Figs. 4 (a) and 4 (b), the agitator 25 is rotated above the feed screw 23b to stir the fly ash H1 in the hopper portion 21, And the fly ash H1 is supplied to the feed screw 23b and the discharge screw 24b. When the agitator 25 is not provided in the hopper portion 21, the fly ash H1 in the hopper portion 21 is fixed to form a bridge as shown in Fig. 5, There is a fear that the fly ash H1 is supplied or the discharge screw 24b is not discharged. The shape of the agitator 25 is not limited to the flat plate-like agitator shown in Fig. 4 and may be a paddle type stirring member or the like as long as the shape of the agitator 25 is such that the flyash H1 in the hopper portion 21 can be stirred .

The supply screw 23b is rotated reversely at the same time as or before or after the rotation of the discharge screw 24b in order to surely discharge the residual material H3 in the hopper portion 21, The material H3 may be dropped into the discharge screw 24b. At this time, if the agitator 25 on the upper portion of the feed screw 23b is rotated to rotate the feed screw 23b while stirring the remaining material H3, the residual material H3 can be smoothly discharged by the discharge portion 24, .

(Control unit 27)

The control section 27 is electrically connected to each member including the load cell 22 in order to accurately weigh the fly ash H1 in the weighing section 20. [

Generally, a device for performing the treatment of the fly ash (H) is provided with a vibrator (not shown) on the fly ash transport path 2 in order to prevent sticking of the fly ash (H). For example, these vibrators operate every few minutes for several seconds. Therefore, when the weight of the device (weight of the device) is reduced in the load cell 22 while the vibrator is operating, the weight value of the load cell 22 includes an error due to the influence of vibration. As a result, the control unit 27 of the weighing unit 20 eventually determines the weighing amount or more. Also, when the vibrator is actuated during the weighing of the fly ash H1 by the weighing section 20 with the feed screw 23b, the weighing value of the load cell 22 includes a large error. As a result, the control unit 27 erroneously determines that the weight has reached the predetermined weight, and transmits a drive stop signal to the supply screw 23b. Therefore, it is necessary to prevent the load cell 22 from being affected by vibration of a vibrator or the like.

Fig. 6 is a block diagram showing the configuration of the control section 27. Fig. In the weighing section 20, the control section 27 includes a vibration receiving section 27A for receiving the vibration information of the hopper section 21, a vibration detecting section 27A for detecting vibration of the hopper section 21, The reception judgment means 27B and the weight loss command means 27C for transmitting the weight loss command signal to the load cell 22 when it is judged by the vibration reception judgment means 27B that it is not being received . The control unit 27 further includes a drive start command means 27D, a metering value acquisition means 27E, a metering value determination means 27F, a drive stop command means 27G, a metering value reacquisition means 27H, It is preferable to provide the means 27I for each of the metering trial, the drive start re-ordering means 27J, and the metering end means 27K.

(Vibration receiving means 27A)

The vibration receiving means 27A receives the operation signal (vibration information) from the vibrator provided on the flyash conveying route 2 or the like. When the sampling unit 10 includes the vibrator 16 for vibrating the guide unit 12, the vibration receiving unit 27A may further receive the movement signal (vibration information) from the vibrator 16, In the case where the weighing section 20 includes a vibration system for detecting vibration of the hopper section 21, the vibration receiving means 27A may further receive vibration information from the vibration system.

(Vibration reception judging means 27B)

The vibration reception determining means 27B determines whether or not the vibration receiving means 27A is receiving vibration reception information.

(Weight reduction instruction means 27C of the machine weight)

The weight loss command means 27C of the weight of the appliance transmits a weight loss command signal to the load cell 22 when it is determined that the vibration information is not being received by the vibration reception judgment means 27B. The load cell 22 measures the initial weight of the hopper section 21 containing the fly ash H1 which is separated from the sampling section 10 and reduces the weight of the machine when the weight loss command signal of the machine weight is received.

(Drive start command means 27D)

The driving start command means 27D is a means for instructing the motor M1 of the feeding portion 23 to start driving when the weight loss command signal is transmitted by the weight loss command means 27C And sends the command signal to forwardly rotate the feed screw 23b.

(Metering value acquisition means 27E)

The metering value acquisition means 27E acquires the metering value from the load cell 22 at a predetermined interval when the drive start command signal is transmitted by the drive start command means 27D.

(Metering value judging means 27F)

The metering value determination means 27F determines whether or not the metered value acquired by the metering value acquisition means 27E reaches a predetermined weighted value.

(Driving stop command means 27G)

The drive stop command means 27G is a means for stopping the operation of the motor 23 of the supply unit 23 when the metering value acquired by the metering value acquisition means 27E is determined to have reached the predetermined weight reduction value by the metering value determination means 27F M1 to stop the rotation of the supply screw 23b.

(Metering value reacquisition means 27H)

The metering value reacquisition means 27H is a means for acquiring the metric value from the load cell 22 when it is discriminated that the vibration is not being received by the vibration reception judging means 27B after the motor M1 (supply screw 23b) Re-acquire the weighing value.

(Means for Measuring Value Trial (27I))

The metric value determination means 27I determines whether or not the metric value acquired by the metric value reacquisition means 27H reaches a predetermined weight reduction value.

(Drive start re-instruction means 27J)

When it is determined that the re-acquired weight value has not reached the predetermined weight loss value by the means for trial value measurement 27I, the drive start re-instruction means 27J starts driving The command signal is transmitted again.

(Metering end means 27K)

When it is determined that the metered value reacquired by the metered value reacquisition means 27H has reached the predetermined weighted value by the metered value trial means 27I, the metered value re- And the acquisition of the weighing value by the hitting unit 27H is terminated.

Hereinafter, the weighing method by the weighing unit 20 will be described with reference to the flowchart shown in Fig.

The vibrating reception determining means 27B determines that the vibration receiving means 27A has received the vibration signal from the vibrator (vibration from the vibrator 16 or vibration from the vibration system) at the timing at which the metering start trigger is received (Step S1) Information or the like) is received (step S2). In the case of No in step S2, the control unit 27 moves the process to step S3. On the other hand, in the case of Yes in the step S2, the control section 27 returns to the step S2.

If it is determined that the vibration receiving means 27A does not receive the operation signal (vibration information) from the vibrator (No in Step S2), the weight loss command means 27C instructs the load cell 22 A weight reduction command signal is transmitted to instruct the load cell 22 to reduce the weight of the apparatus (step S3).

Subsequently, the drive start instruction means 27D starts driving of the supply screw 23b to the motor M1 of the supply unit 23 in accordance with the weight loss command signal from the weight loss command means 27C A drive start command signal for instructing a drive start command signal. As a result, the fly ash H1 is released from the hopper 21 (step S4). The load cell 22 measures the weight loss value from the hopper section 21. [

Subsequently, the metering value acquiring means 27E acquires a signal (metering value) indicating the metering result from the load cell 22 (step S5).

Next, the metering value judging means 27F judges whether or not the metering value of the load cell 22 acquired by the metering value obtaining means 27E has reached a predetermined weighting value (the weight of the flywheel H2 required for preparation of the leaking water) (Step S6). If the answer is Yes in step S6, the control unit 27 moves the process to step S7. On the other hand, in the case of No in step S6, the control section 27 returns the processing to step S6.

When it is determined by the metering value judging means 27F that the metered value acquired by the metering value acquiring means 27E reaches a predetermined weighting value (Yes in Step S6), the drive stopping instruction means 27G instructs the supply portion 23 to stop the driving of the motor M1. As the motor M1 receives the drive stop command signal, the motor M1 stops picking up by the feed screw 23b (step S7).

Subsequently, the vibration reception judging means 27B judges whether or not the vibration receiving means 27A has received the vibration information in accordance with the drive stop command signal from the drive stop command means 27G (Step S8). In the case of No in step S8, the control section 27 moves the process to step S9. On the other hand, in the case of Yes in the step S8, the vibration reception judgment means 27B returns the processing to the step S8.

When it is determined by the vibration receiving means 27B that the vibration receiving means 27A has not received vibration information (No in Step S8), the metering value reacquisition means 27H acquires the weight value from the load cell 22 And acquires the signal (metering value) indicating the measurement result again (step S9).

Subsequently, the metering value trial means 27I determines whether the metered value reacquired by the metered value reacquisition means 27H reaches a predetermined weighted value (step S10). If the determination in step S10 is Yes, the control unit 27 moves the process to step S11. On the other hand, in the case of No in step S10, the control section 27 returns the processing to step S4.

When it is determined by the metering value trial means 27I that the metered value acquired by the metered value reacquisition means 27H reaches a predetermined weighted value (Yes in step S10), the control unit 27 ends the metering Step S11).

Subsequently, the control unit 27 determines whether or not the analysis ending signal from the analysis / control unit 40 is received (step S12). This processing is performed by determining whether or not the control unit 27 has received the analysis end signal from the analysis / control unit 40. If the control unit 27 determines that the analysis in the analysis / control unit 40 is completed in the process of the step S12 (Yes in the step S12), the control unit 27 moves the process to the step S13. On the other hand, when the control unit 27 determines that the analysis in the analysis / control unit 40 has not ended in the process of the step S12 (No in the step S12), the control unit 27 returns the process to the step S12.

When the control unit 27 determines that the analysis in the analysis / control unit 40 has ended (Yes in step S12), the control unit 27 transmits a drive start command signal to the motor M2 of the discharge unit 24 The discharge screw 24b is rotated to discharge the residual material H3 from the hopper portion 21 to a predetermined place (step S13).

On the other hand, when the control unit 27 determines that the analysis in the analysis / control unit 40 has not ended in the process of the step S12 (No in the step S12), the drive start instruction unit 27D again supplies the supply unit 23, The drive start command signal for instructing the start of the drive of the feed screw 23b to the motor M1 of the motor M1 (step S4). Then, as described above, steps S4 through S10 are repeated until the metered value reacquired by the metric value reacquisition means 27H reaches a predetermined weight loss value (Yes in step S10).

In the case where the weight of the load cell 22 is reduced when the vibrator provided in the flyash path 2 is not operated as described above, as compared with the case where the weight of the device is reduced when the vibrator is in operation, Of the weight loss error rate decreased from 90% to 5%. Similarly, when weighing while confirming the weighing value in the load cell 22 when the vibrator is not operating, the weighing error rate is also changed from 60% to 3% as compared with when the weighing is performed when the vibrator is operating Respectively.

When the vibration system for detecting the vibration of the hopper unit 21 does not detect the vibration and the weight of the outer package of the load cell 22 is connected to the weight, , The weight loss error rate of the device weight was reduced from 90% to 0%. Similarly, when weighing while confirming the weighing value in the load cell 22 when the vibrometer is not detecting the vibration, the weighing error rate is reduced to 60% as compared with when the weighing is performed when the vibrometer is detecting the vibration, To 0%.

Further, in the weighing section 20, the vibration proof rubber 28 may be laid under the mounting table 26 for fixing the load cell 22 (see FIG. 1). In the case where the anti-vibration rubber 28 is installed and the weight of the device is reduced, the weight loss rate of the device is reduced from 90% to 30% and the weight error rate is reduced to 60% To 20%.

The weighing method for weighing the supply amount of the fly ash H1 to the leaching section 30 is not limited to the weight loss control formula by the load cell 22 described above, For example, the metering method employed in the present embodiment may be a so-called volumetric type (volumetric type) in which the supply screw in the hopper portion is operated at a constant rotation to estimate the supplied amount of fly ash. The volumetric metering method is simple in the structure of the apparatus, but it is necessary to maintain the amount of the fly ash in the hopper unit at a constant volume. The weighing method adopted in the present embodiment may be so-called belt type in which the weight of the fly ash on the belt and the belt speed are detected, the supply amount is integrated, and the belt speed is controlled so as to coincide with the predetermined supply amount. The weighing method employed in the present embodiment is a so-called weighing method in which a fly ash is charged into a hopper portion by a device and the introduction of fly ash is stopped when the weight of the hopper portion reaches a predetermined weight to supply fly ash in the hopper portion It may be a hopper scale. In terms of weighing accuracy, a weighting method based on the weight loss control method is preferable.

[Elution section (30)]

Fig. 8 is a schematic view for explaining the configuration near the loading tank and the flyash input port. The eluting portion 30 is provided with an ejection tank 31 closed by a lid 32 having a flyash input port 32a, a solvent supply portion for supplying a solvent (water or the like) according to a predetermined amount of the weight material H2, And a stirrer for stirring the solvent in the application tank 31 and the weighing material H2 to prepare elution water to be supplied to the analysis / control unit 40. The elution unit 30 may be provided with a sensor such as a pH electrode for measuring the pH of eluted water in the application tank 31 or an ion electrode for measuring the ion concentration of various metal ions.

A predetermined amount of solvent (water or the like) is supplied in the solvent supply portion in the leaching tank 31 and a predetermined amount of the weighed material H2 is supplied from the supply nozzle 23a to the fly ash inlet 32a And the solvent and the weight material H2 are stirred and mixed by a stirrer to prepare the eluted water. The elution unit 30 supplies elution water of a predetermined amount from the prepared eluted water to the analysis / control unit 40 as a sample for analysis. At the time when the analysis and control unit 40 finishes the analysis, the elution unit 30 drains the remaining elution number and injects cleansing water from the cleansing nozzle to clean the inside of the application bath 31. The discharged eluted water and the washing water may be used in the fly ash treatment as the humidifying water in the kneader 3.

As shown in Fig. 8, the weighing material H2 is fed from the feed nozzle 23a into the filtration tank 31 through the flyash input port 32a. However, when the weighing material H2 is introduced into the application tank 31, the solvent of the application tank 31 is protruded from the flyash input port 32a and attached to the tip of the supply nozzle 23a, There is a case where the weighing material H2 is adhered to the tip of the supply nozzle 23a. Therefore, the space between the feed nozzle 23a and the flyash feed port 32a is covered above the flyash feed port 32a, for example, in order to prevent the weighing material H2 from sticking to the feed nozzle 23a Shaped cover 33 having a diameter substantially equal to the diameter of the flyash material inlet port 32a is provided on the cover 33 through the inlet port 34 as drying means provided above the cover 33 Dry air, hot air or dry hot air A may be blown into the inside of the room. The tip of the supply nozzle 23a may be inserted into the cover 33 from the opening 33a opened in the cover 33. [ The air suction port 35 is provided in the lid 32 of the discharge vessel 31 and the suction means (not shown in the drawing) is provided in order to prevent the weighing material H2 from sticking to the supply nozzle 23a. The wetted air B in the wetting / wetting tank 31 may be pulled out to prevent the wetted air from the flyash input port 32a from rising or the supply nozzle 23a to be warmed.

When dry air, hot wind or dry hot air (A) is blown from the inlet port 34 during the discharge of the flyash material H1 by the supply part 23, the blown off weight material H2 is scattered It adheres to the periphery of the flyash input port 32a of the release tray 31 and grows, and eventually closes the entrance of the flyash input port 32a. Therefore, it is preferable to stop blowing dry air, warm air or dry hot air A from the intake port 34 during floating of the flyash H1.

[Analysis / Control Unit (40)]

The analysis / control unit 40 analyzes the amount of a predetermined component, for example, a predetermined heavy metal component included in the elution water supplied from the elution unit 30, and based on the analysis result, for example, The amount of the heavy metal immobilizing agent added to the fly ash (H) is determined so that the pH of the fly ash (H) becomes 9 to 11. Specifically, when the analysis control unit 40 detects that the preparation of the eluted water in the elution unit 30 is completed, the analysis control unit 40 receives the eluted water of a predetermined amount from the elution unit 30, And the addition rate of the heavy metal immobilizing agent is calculated. Then, the injection rate of the flyash treatment liquid necessary for the flyash treatment is calculated, and this is output to the drug injection pump 5 as a pulse signal or an analog signal (4 to 20 mA). Or the analysis and control unit 40 acquires the flow rate signal of the fly ash H to be delivered to the fly ash transportation path 2 and multiplies the flow rate of the fly ash H by the addition rate of the heavy metal immobilizing agent, Calculates the amount of the chemical solution to be added, and outputs it to the medicine infusion pump 5. The analyzing / controlling unit 40 drains and cleans the elution number used for the analysis at the end of the analysis. The discharged eluted water and the washing water may be used in the fly ash treatment in the kneader 3.

[Overall structure]

In the flyash material processing apparatus including the apparatus for determining the amount of addition of heavy metal immobilizing agent of the above-described configuration, the fly ash H to be fed to the flyash conveying route 2 is fed to the collecting section 10 And falls to the hopper portion 21 of the weighing unit 20. [ The fly ash H1 which has fallen in the hopper portion 21 of the weighing section 20 from the collecting section 10 is discharged and weighed by the forward rotation of the feed screw 23b, . At this time, the weight of the fly ash H1 in the hopper portion 21 and the hopper portion 21 is metered by the load cell 22, and when the weight value of the load cell 22 reaches a predetermined weight loss value, The rotation of the feed screw 23b stops. In the elution unit 30, a predetermined amount of the weighed material H2 and the solvent are mixed in the ejection tank 31 to prepare the eluted water. The analysis / control unit 40 calculates a proportion of the heavy metal immobilizing agent necessary for the fly ash treatment and calculates the addition rate or the addition amount of the leaching water, and outputs this to the medicine infusion pump 5.

On the other hand, in the weighing section 20, when the preparation of the eluted water in the elution section 30 is completed or when the analysis of the elution number in the analysis / control section 40 is finished, H3 are discharged to the flyash conveying path 2 by the discharge portion 24 and sent to the kneader 3. [ When the analyzing / controlling unit 40 finishes analyzing the eluted water, the eluting unit 30 drains the remaining eluted water and injects the washing water from the washing nozzle to clean it. When the discharge of the residual material H3 and the cleaning of the application tank 31 are finished, the next metering start trigger is waited for, and when the next metering start trigger is received, the above operation is repeated from the picking up process of the flyash H . The metering start trigger may be triggered by the discharge of the residual material H3 and the cleaning of the loading / unloading tank 31, or may be triggered by a timer for a fixed cycle or by a clock It may be a trigger. Further, when the operation signal of the fly ash treatment is ON in the metering start condition, or when the fly ash flow rate signal exceeds a predetermined threshold value, etc. may be added.

Thus, in the addition amount determination apparatus 1 described above, the remaining material H3 is sent to the kneader 3 through the flyash feed path 2. [ Therefore, the fly ash concentration of the eluted water in the application tank 31 is not increased. Therefore, it is necessary to treat the residual material (H3) in a different system from that of a conventional fly ash treatment system, such as a case where a large amount of water is required to clean the application tank (31) And the residual material H3 can be easily and inexpensively processed.

≪ Modification Example 1 &

In the flyash material treatment apparatus shown in FIG. 1, the analysis / control unit 40 receives the elution water from the application tank 31 and analyzes it. However, the present invention is not limited to this configuration. 9 is a configuration diagram showing a configuration of a flyash material processing apparatus according to another embodiment. In Fig. 9, the same members as those shown in the drawings are denoted by the same reference numerals, and a description thereof will be omitted.

9, the sensor 36 of the pH electrode or the ion electrode provided in the application tank 31 is provided with a sensor 36 for detecting the presence or absence of an enemy And the concentration of heavy metal ions in the eluting water in the application tank (31) is detected. The analysis / control unit 40 'calculates the addition rate or addition amount of the heavy metal immobilizing agent from the heavy metal ion concentration detected by the leaching unit 30', and outputs it to the medicine infusion pump 5.

≪ Modification Example 2 &

1 to 9 show an example in which the residual material H3 is discharged to the flyash material conveying path 2 but the place where the residual material H3 is discharged is different from the discharge vessel 31 And may be located on the downstream side of the fly ash transporting direction rather than the fly ash collection position. For example, the remaining material H3 may be directly introduced into the kneader 3 without passing through the flyash feed path 2.

≪ Modification 3 &

The flyash material treatment apparatus shown in Figs. 1 to 9 is configured to put the flyash material H in the flyash silo into the kneader 3 via the flyash transfer path 2 for dropping the flyash material downward. However, H) may be conveyed by the bucket conveyor and fed into the kneader. In the case of collecting the fly ash (H) on the bucket conveyor, the bucket conveyor is stopped and the fly ash is collected from the bucket, or the motion of the bucket provided in the bucket conveyor is detected by the optical sensor or the like, And the fly ash (H) is collected from the bucket while moving the container. On the other hand, when the residual material H3 is discharged onto the bucket conveyor, the remaining material H3 may be dropped on the bucket on the horizontally moving bucket conveyor on the downstream side of the picking position in the moving direction of the bucket conveyor. When the residual material H3 is dropped on the bucket conveyor in the vertically moving bucket conveyor, the bucket conveyor is stopped and the remaining material H3 is dropped in the bucket, or the remaining material H3 in the bucket is moved in synchronism with the movement of the bucket It is good to drop.

<Modification 4>

The amount of the heavy metal immobilizing agent to be added to the fly ash (H) before the addition of the heavy metal immobilizing agent in the fly ash silo was determined in the fly ash treatment apparatus shown in Figs. 1 to 9, It may be a fly ash after the immobilizing agent is introduced. In this case, the analysis / control unit 40 may analyze the remaining amount of heavy metal immobilizing agent in the eluted water and control the amount of the heavy metal immobilizing agent to be added to the fly ash based on the analysis result.

1 addition amount determining device
2 fly ash transportation path
3 kneader
4 Fly ash treatment tank
5 Drug infusion pump
10 Collection section
11 fur skin
12 Information section
13 cups
14 Air cylinder
15 rotary actuator
16 Vibrator
17 Entrance
20 Weighing part
21 hopper portion
22 load cell
23 Supply Section
23a Supply nozzle
23b Feed Screw
24 outlet
24a discharge nozzle
24b Discharge Screw
25 agitator
26 Mounting
27 control unit
30 elution unit
31 solicitations
32 Lid
33 cover
34 Entrance
35 suction
40 Analysis and Control

Claims (13)

A weighing section for weighing a predetermined amount of fly ash from the fly ash transport path,
An elution unit for eluting said predetermined amount of fly ash into a solvent to obtain eluted water;
An addition amount determining section that determines the amount of the heavy metal immobilizing agent to be added to the fly ash on the basis of the amount of the predetermined component included in the leached water;
And a discharging portion for discharging the remaining material remaining in the weighing portion to a place different from the leaking portion,
Wherein the discharging portion discharges the remaining material to a place different from the leaking portion even when the amount of the heavy metal immobilizing agent added to the fly ash is determined by the adding amount determining portion,
The weighing unit includes:
A fly ash containing portion for containing fly ash,
A supply section for supplying the fly ash in the fly ash storage section to the leaching section,
A load metering section for measuring a load applied from the flyash containing section,
And a control unit electrically connected to the supply unit and the load metering unit,
Wherein,
A vibration receiving means for receiving vibration information of said flyash storage unit;
Vibration receiving judging means for judging whether the vibration receiving means is receiving vibration receiving information,
And a weight decreasing command means for transmitting a weight reduction command signal to the load metering section when it is determined by the vibration reception judging means that it is not being received
Apparatus for determining the amount of heavy metal immobilization agent added to fly ash.
The method according to claim 1,
The discharging portion discharges the residual material to the flyash conveying path
Apparatus for determining the amount of heavy metal immobilizing agent added.
The method according to claim 1 or 2,
The addition amount determining section determines the addition amount of the heavy metal immobilizing agent by multiplying the flow rate of the fly ash in the fly ash transport path by the addition rate of the heavy metal immobilizing agent
Apparatus for determining the amount of heavy metal immobilizing agent added.
The method according to claim 1 or 2,
Wherein,
Drive start instruction means for transmitting a drive start instruction signal for instructing the start of drive of the supply section when a weight loss command signal of the machine weight is transmitted by the weight loss instruction means of the machine weight,
Metering value acquiring means for acquiring a metering value from the load metering section when the drive start command signal is transmitted by the drive start instruction means,
Weight value judging means for judging whether or not the metric value acquired by the metric value acquiring means has reached a predetermined weight reduction value,
And a drive stop command signal for transmitting a drive stop command signal for instructing stop of drive of the supply unit when it is determined by the metered value determination means that the metered value acquired by the metered value acquisition means reaches a predetermined weighted value Sudan,
A metering value reacquisition unit that reacquires the metering value from the load metering unit when it is determined that the vibration is not being received by the vibration reception determining unit after stopping the operation of the supplying unit,
A metering value judgment means for judging whether or not the metered value acquired by the metered value reacquisition means has reached a predetermined weighted value,
Acquiring means for acquiring a weight value from the weight value re-acquiring means; a drive start re-command means for transmitting again the drive start command signal when it is determined that the metered value reacquired by the metered value re- ,
Acquiring means for re-acquiring the metering value by the metering value re-acquiring means when it is determined that the metering value reacquired by the metering value re-acquiring means has reached a predetermined weighting value, Further comprising an ending means
Apparatus for determining the amount of heavy metal immobilizing agent added.
The method according to claim 1 or 2,
Wherein the supply unit includes a screw and an agitator disposed above the screw.
The method according to claim 1 or 2,
Wherein the leaking portion comprises: a leaching tank for containing the leached water; a lid capable of closing the leaching tank; a fly ash inlet opening in a part of the lid; and a fly ash supply opening for covering the space between the fly ash feeder and the fly- Further comprising a cover,
Wherein the cover is provided with drying means for blowing dry air, hot air or dry hot air into the inside thereof.
The method according to claim 1 or 2,
The leaching unit may further include a leaching tank for containing the eluted water, a lid capable of closing the leaching tank, a suction port opened in a part of the lid, and a suction unit for extracting air in the leaching tank from the suction port The amount of the heavy metal immobilizing agent being determined.
The method according to claim 1 or 2,
Wherein the weighing section has a fly ash receiving section for receiving fly ash contained therein,
Wherein at least a part of the member in contact with the fly ash in the fly ash receiving portion is subjected to fluorine resin processing.
The method according to claim 1 or 2,
Further comprising a sampling section for sampling a predetermined amount of fly ash from the fly ash transport path and supplying the collected fly ash to the weighing section.
10. The method of claim 9,
Wherein at least a part of the member which comes into contact with the fly ash in the collecting part is subjected to fluorine resin processing.
10. The method of claim 9,
Wherein the sampling unit includes drying means for blowing dry air, hot air or dry hot air into the inside of the collecting unit.
10. The method of claim 9,
Wherein the sampling unit further includes a vibrator for oscillating the sampling unit. delete

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