TW201629453A - Automatic sampling apparatus for fly ash and automatic sampling method for fly ash - Google Patents

Abstract

To provide a simple automatic fly ash sampling device capable of supplying only a prescribed amount of fly ash sampled from a fly ash chute to an additive amount determination device. The present invention has a collection part for sampling fly ash from a fly ash chute, a hopper part for storing the fly ash sampled by the collection part, a fixed amount supply part capable of causing the fly ash inside the hopper part to flow out at a constant flow rate, and a control unit for causing the fixed amount supply part to supply a fixed amount of fly ash for inspection to an additive amount determination device when the equipment of the additive amount determination device enters a mode for accepting fly ash, causing the fly ash inside the hopper not used for inspection to be discharged to the outside via the additive amount determination device when the equipment of the additive amount determination device enters a first or second transmission mode for transmitting fly ash, and causes the collection unit to store new fly ash from the fly ash chute inside the hopper when the equipment of the additive amount determination device enters a standby mode between the first and second transmission modes.

Description

Fly ash automatic sampling device and non-swap automatic sampling method

The present invention relates to an automatic fly ash sampling device and an automatic fly ash sampling method. In order to perform a process for detoxifying heavy metals in fly ash, the fly ash is supplied to the additive amount determining device for investigation only in a predetermined amount. The addition amount determining means defines an appropriate addition amount of the heavy metal fixing agent added to the fly ash.

The fly ash generated when incinerating waste contains a large amount of heavy metals. Therefore, in order to dispose of the fly ash, it is necessary to carry out the harmless treatment of heavy metals. In order to make the heavy metals harmless, it is common to add a heavy metal fixing agent to the collected fly ash, and humidify and knead them by using a kneading machine. At this time, the properties of the fly ash (such as the heavy metal content) vary greatly depending on the type of the incineration product, etc., so the amount of the heavy metal fixative added to the fly ash also needs to be changed in accordance with the properties of the fly ash. Therefore, the sampled fly ash is supplied to the addition amount determining means, and the state of the fly ash is measured by the addition amount determining means, whereby the appropriate addition amount of the heavy metal fixing agent is determined.

For example, Patent Document 1 describes a method of determining the amount of addition of a heavy metal fixing agent. In the above method, first, water is added to a predetermined amount of fly ash (hereinafter referred to as fly ash for investigation) sampled, and a slurry to be a sample is prepared. Next, a heavy metal fixing agent was continuously added to the slurry, and the amount of increase in oxidation-reduction potential (ORP) (positive amount of change) was measured. Further, based on the measured value, an appropriate addition amount of the heavy metal fixing agent added to the fly ash is determined. At this time, the fly ash for investigation needs to be supplied to the addition amount determining device only in a predetermined amount, that is, accurately, only with a predetermined weight.

Moreover, the sampling operation of the fly ash is usually completed by the operator directly taking the fly ash into the container from the fly ash chute that transports the fly ash downward or from the fly ash silo that stores the fly ash. . In addition, the fly ash for investigation is usually collected from the fly ash that requires sufficient weight to be weighed from the sampled fly ash. Prior art literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2002-126685

[Problems to be solved by the invention]

However, the sampling operation of fly ash is a very complicated operation that is performed multiple times in various time periods including midnight. Moreover, in the sampling operation, the operator also needs to avoid the opportunity to contact harmful fly ash as much as possible. Therefore, the sampling operation of the fly ash is ideally performed without using labor, but using a machine.

On the other hand, when the sampling operation of the fly ash is automatically performed, it is preferable to flow the fly ash from the fly ash storage bin which is likely to cause a bridge phenomenon from the fly ash. The fly ash chute that is transported underneath is sampled. Therefore, for example, as shown in FIG. 13, it is also conceivable to mount a screw feeder 100 as a dosing device to the fly ash chute Y, and automatically perform a sampling operation of the fly ash. At this time, the fly ash collecting port 101c is formed in the upper portion of the cylindrical portion 101b of the screw shaft 101a surrounding the conveying portion 101 in the fly ash chute Y.

However, the amount of fly ash that has entered the collection port 101c of the screw feeder 100 from the fly ash chute Y is not fixed, so that a predetermined amount of fly ash cannot be supplied from the screw feeder 100 to the addition amount determining device. Therefore, it is also conceivable to measure the weight of the fly ash flowing out of the screw feeder 100, and only the fly ash of a predetermined weight is supplied as the fly ash for investigation to the addition amount determining means, but if the operation is automatically performed, it may be generated. This leads to problems of high cost and complexity of the device.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a simple fly ash automatic sampling device and an automatic fly ash sampling method which can supply fly ash sampled from a fly ash chute to a predetermined amount by a predetermined amount. [Means for solving the problem]

According to a first aspect of the present invention, in an automatic fly ash sampling apparatus, in order to perform a process for detoxifying heavy metals in fly ash, the fly ash is supplied to an addition amount determining device for investigation only for a predetermined amount, and the addition amount is used. The determining device defines an appropriate addition amount of the heavy metal fixing agent added to the fly ash, the fly ash automatic sampling device characterized by comprising: an collecting portion, a fly ash chute that transports the fly ash downward Sampling the fly ash; hopper portion temporarily storing the fly ash sampled by the collecting portion; and a dosing portion for allowing the fly ash in the hopper portion to flow into the added amount determination a device, and causing the fly ash in the hopper portion to flow out at a fixed flow rate; and a control portion that causes the quantitative amount when the respective machines of the additive amount determining device become a sample preparation mode for collecting the fly ash The supply unit causes the fly ash in the hopper portion to flow out at a fixed flow rate by only a predetermined amount as the fly ash for investigation, and supplies the fly ash for investigation to the added amount determining device, and the amount of the added amount is determined. When the respective devices of the apparatus are in the first passage mode and the second passage mode in which the fly ash taken in and taken in is passed to the outside, the quantitative supply unit is caused to be in the first passage mode. All of the fly ash remaining in the hopper portion flows out, and in the second passage mode, the fly ash stored in the hopper portion is advanced before the fixed supply portion achieves a fixed flow rate Flowing out and discharging the fly ash in the hopper portion not used for investigation via the addition amount determining device, and each device of the addition amount determining device changes to the first passage mode and the first When passing through the standby mode between the modes, the collecting unit causes the collecting unit to store the fly ash from the fly ash chute in the hopper portion.

In the present invention, each device of the addition amount determining device is set such that the modes are repeated in the order of the sample preparation mode, the first pass mode, the standby mode, and the second pass mode. When the respective devices of the additive amount determining device are in the sample preparation mode, the dosing unit causes the fly ash in the hopper portion to flow out at a fixed flow rate by only a predetermined amount as the fly ash for investigation, and supplies the fly ash for investigation to the added amount. Device. When the respective devices of the additive amount determining device are in the first pass mode, the dosing unit causes all the fly ash remaining in the hopper portion to flow out, and the fly ash in the hopper portion not used for the investigation is passed through the added amount determining device. discharge. As a result, the inside of the hopper portion becomes empty. Next, when each device of the added amount determining device changes to the standby mode, the collecting unit stores the new fly ash from the fly ash chute in the hopper portion. When the respective devices of the additive amount determining device are in the second pass mode, the dosing unit advances the new fly ash in the hopper portion before the fixed flow rate is realized, and the inside of the hopper portion that is not used for the survey is used. The fly ash is discharged through the addition amount determining means. Further, thereafter, the dosing unit can cause the fly ash to flow out at a constant flow rate.

According to a second aspect of the present invention, in the first aspect, the quantitative supply unit is a screw feeder or a table feeder.

According to a third aspect of the present invention, in the second aspect of the invention, the control unit is configured to be capable of supplying the fly ash of a predetermined weight, and to set a rotation speed at a fixed speed based on a volume specific gravity of the fly ash measured in advance. The number of revolutions or the rotation time of the screw shaft of the screw feeder or the platform of the platform feeder.

According to a fourth aspect of the present invention, in the fly ash automatic sampling method, the fly ash is supplied to the addition amount determining device for investigation only for a treatment for detoxifying heavy metals in the fly ash, and the addition amount is used. The determining means specifies an appropriate addition amount of the heavy metal fixing agent added to the fly ash, the fly ash automatic sampling method characterized by comprising: a fly ash supply step, when each machine of the added amount determining means becomes When the sample preparation mode of the fly ash is received, the dosing unit that allows the fly ash in the hopper portion to flow out at a fixed flow rate to flow out the fly ash in the hopper portion by a predetermined amount at a fixed flow rate The investigation is performed by the fly ash to the additive amount determining device; the residual fly ash discharging step, after the fly ash supplying step, the respective machines of the added amount determining device become the fly ash taken into the interior When passing through the first passage mode to be discharged to the outside, the quantitative supply unit causes all of the fly ash remaining in the hopper portion flowing out of the hopper portion to flow into the added amount a fly ash storage step, a fly ash chute that transports the fly ash downward when the machine of the added amount determining device changes to the standby mode after the residual fly ash discharge step And storing the fly ash sampled by the collecting portion in the hopper portion; and an initial fly ash discharging step, after the fly ash storing step, the machines of the adding amount determining device are changed to take When the fly ash that has entered the inside passes through and is discharged to the external second pass mode, the dosing unit causes the fly ash stored in the hopper portion to flow out before the fixed flow rate is realized to flow into The addition amount determining means is discharged. [Effects of the Invention]

In the above invention, the fly ash in the hopper portion sampled from the fly ash chute can be supplied to the additive amount determining device by the quantitative supply portion, so that the simplification and low cost of the device can be realized. Chemical. Further, in the above inventions, all the fly ash in the hopper portion not used for investigation is discharged to the outside via the addition amount determining means for each sampling of the fly ash by the quantitative supply unit. Therefore, in these inventions, even if the sampling of the fly ash is repeated, the new fly ash in the hopper portion does not mix with the former fly ash. At this time, the treatment of the fly ash which is not used for the investigation can be completed simply and surely by the addition amount determining means. Further, in the above inventions, the quantitative supply unit is operated in advance to prepare the supply of the fly ash for investigation, and the dosing unit can flow the fly ash in the hopper portion at a constant flow rate, so that the fly ash for investigation can be used. It is accurately supplied to the addition amount determining device with a sufficient amount of demand.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a view showing a flow from generation to disposal of fly ash.

As shown in Fig. 1, the combustion gas G generated when the waste is incinerated in the incinerator contains fly ash H. Therefore, after the combustion gas G is cooled, for example, the fly ash H is removed by a bag filter B and discharged from the chimney E. Further, since the bag filter B has a plurality of cylindrical filter cloths, the fly ash H captured by the cylindrical filter cloths is sequentially collapsed and accumulated in the bottom of the bag filter B. The fly ash H in the bag filter B is transported to the fly ash storage bin S almost continuously by the conveyor belt C, and is stored in the fly ash storage bin S. The fly ash H in the fly ash storage bin S is supplied to the fly ash chute Y which sends the fly ash H downward, and is supplied at a fixed flow rate by measuring the flow rate by a dosing machine F like a screw feeder. To the kneading machine K. To the fly ash H in the kneading machine K, water of a predetermined flow rate is added via the supply device T, and a heavy metal fixing agent is added at a predetermined flow rate. Further, the fly ash H, the water, and the heavy metal fixing agent are humidified and kneaded by the kneading machine K, and are discharged from the kneading machine K in a state in which the dissolution of the heavy metal in the fly ash H is suppressed (in a harmless state). Then, dispose of it.

Further, the control device X monitors the level of the fly ash H in the fly ash storage bin S, and when it is at the low level, stops the operation of the dosing machine F. However, in general, the supply amount of the fly ash H from the conveyor belt C and the amount of the fly ash H from the dosing machine F are balanced, and therefore the operation of the dosing machine F is not stopped by the control device X.

On the other hand, the property (type or content) of the heavy metal in the fly ash H changes depending on the kind of the waste to be incinerated, and therefore the amount of the heavy metal fixative added to the fly ash H also needs to be changed. Therefore, the fly ash automatic sampling device 1 samples the fly ash chute Y which can be collected from the fly ash H without causing a cross-linking phenomenon, and supplies the fly ash H to the additive amount determining device 2 for a predetermined amount. survey. The addition amount determining device 2 determines an appropriate addition amount of the heavy metal fixing agent for the fly ash H based on the investigation fly ash H1. Then, an appropriate addition amount of the heavy metal fixing agent obtained based on the investigation of the fly ash H1 is transmitted to the control device X, and the supply device T is controlled by the control device X. In addition, the unnecessary substances such as the investigation fly ash H1 in the added amount determining device 2 that has been completed are transported to the kneading machine K for processing.

2 shows the details of the fly ash automatic sampling device 1 (hereinafter referred to as the automatic sampling device 1) according to the embodiment of the present invention, and the supply of a predetermined amount (predetermined weight) of the fly ash H1 for investigation from the automatic sampling device 1. The amount of addition determines the details of the device 2.

First, the addition amount determining device 2 will be described. The addition amount determining device 2 measures the amount of increase (positive amount of change) of the oxidation-reduction potential (ORP) for the sampled fly ash H1 of the predetermined weight, and determines the addition to the fly ash H based on the measured value. A suitable amount of heavy metal fixative added. In the addition amount determining device 2, all operations are automatically performed. As shown in FIG. 2, the addition amount determining device 2 includes a metering tank 60, a medicine supply unit 61, a water supply unit 62, a stirrer 63, a sensor unit 64, a discharge solenoid valve 65, a discharge line 66, and a control unit 67.

The metering tank 60 is a container that is opened upward and has a funnel shape at the lower portion and a small diameter. Although not shown in the figure, the metering tank 60 is provided with a level gauge, and based on the indication value, the amount of water or the like added to the inside is known.

The drug supply unit 61 adds a predetermined amount of heavy metal fixative (hereinafter referred to as a chemical) to the sample (described below) in the measurement tank 60 in accordance with the surveyed fly ash H1 of a predetermined weight added to the metering tank 60.

In the water filling step M5 described below, the water supply unit 62 supplies a predetermined amount of water to the measuring tank 60 in accordance with the investigation fly ash H1 added to the predetermined weight in the measuring tank 60. Moreover, the water supply unit 62 supplies the amount of water required for washing in the washing step M5 described below so as to be sprayed into the measuring tank 60.

The agitator 63 agitates the fly ash H1 for investigation in the measuring tank 60 and water for a fixed period of time to prepare a slurry to be a sample. Further, the agitator 63 agitates the slurry and the agent added to the slurry to promote the reaction between the heavy metal in the fly ash H1 for investigation and the drug.

The sensor portion 64 measures the concentration of the drug in the slurry as an oxidation-reduction potential (ORP).

The discharge solenoid valve 65 is provided at the lower end of the metering tank 60, and moves the unnecessary substance containing the slurry and the medicine in the measuring tank 60 whose measurement has been completed to the discharge line 66 side. The discharge line 66 connects the discharge solenoid valve 65 to the kneading machine K, and discharges unnecessary substances in the metering tank 60 into the kneading machine K. The discharge line 66 is disposed in a vertically or downwardly inclined manner so that the internal unnecessary matter flows into the kneading machine K by the action of gravity.

The control unit 67 has a function of controlling the operation of the medicine supply unit 61, the water supply unit 62, the agitator 63, and the discharge solenoid valve 65. Further, the control unit 67 includes an arithmetic transmission unit 67a that receives the output from the sensor unit 64 and calculates the concentration of the drug when the drug is added to the slurry (the time when the drug concentration is high) The difference in oxidation-reduction potential (ORP) at the time of decrease in reaction with heavy metals. The calculation transmission unit 67a determines the amount of the medicine consumed by the heavy metal in the fly ash H1 for investigation based on the difference in the oxidation-reduction potential (ORP), thereby determining the appropriate amount of the medicine for the fly ash H. Further, the arithmetic transmission unit 67a transmits the determined value to the control device X on the kneading machine K side.

Next, the operation of the added amount determining device 2 will be described. When the addition amount determining device 2 is not associated with the automatic sampling device 1, as shown in FIG. 3, the sample preparation step M1, the measurement step M2, the discharge step M3, the washing step M4, and the water filling step M5 are repeated. Here, each device of the addition amount determining device 2 is sequentially set to the sample preparation mode for executing the sample preparation step M1, the measurement mode for executing the measurement step M2, the discharge mode for executing the discharge step M3, and the execution of the cleaning step M4 by the control unit 67. The cleaning mode and the water filling mode of the water filling step M5.

In the sample preparation step M1, a predetermined weight of fly ash H1 for investigation is supplied from the automatic sampling device 1 in the metering tank 60 in which a predetermined amount of water is accumulated by the water supply unit 62. Moreover, in the above-described step M1, the investigation fly ash H1 and the water are stirred by the agitator 63 for a predetermined period of time to prepare a slurry to be a sample. In the next measurement step M2, after a predetermined amount of the chemical is added to the slurry, the substances are stirred by the agitator 63 to promote the reaction between the heavy metal in the fly ash H1 for investigation and the chemical. At this time, the sensor 64 measures the oxidation-reduction potential (ORP) before and after the reaction, and transmits the value to the control unit 67. In the control unit 67, based on the output from the sensor unit 64, the calculation transmitting unit 67a determines the appropriate amount of addition of the heavy metal fixing agent for the investigation of the fly ash H1, and transmits it to the control device X on the side of the kneading machine K.

In the discharge step M3 after the measurement step M2, the discharge solenoid valve 65 is opened, and the unnecessary substance in the metering tank 60 containing the slurry and the drug after the measurement is discharged to the kneading tank K via the discharge line 66. In the next cleaning step M4, the water in the metering tank 60 is cleaned by the water supplied from the water supply unit 62 by the discharge, and the water is discharged into the kneading tank K via the discharge line 66. Further, in the water filling step M5 after the washing step M4, the discharge solenoid valve 65 is closed, and a predetermined amount of water is accumulated in the metering tank 60 by the water supply unit 62.

Next, the automatic sampling device 1 will be described. The automatic sampling device 1 is a device that supplies the fly ash H sampled in the fly ash chute Y to the addition amount determining device 2 as the investigation fly ash H1 with a predetermined weight. As shown in FIG. 2, the automatic sampling device 1 includes a fly ash collecting unit 10, a hopper unit 20, a quantitative supply unit 30, and a control unit 50.

The fly ash collecting unit 10 samples a fixed amount of fly ash H from the fly ash chute Y that transports the fly ash H downward, and stores it in the hopper unit 20. The amount of the fly ash H collected by the fly ash collecting unit 10 is a quantity in which the fly ash H1 for investigation, that is, the amount of the fly ash H1 for investigation of a predetermined weight is sufficiently supplied to the added amount determining device 2 .

The hopper portion 20 temporarily stores the fly ash H sampled by the fly ash collecting portion 10. The lower portion of the hopper portion 20 is formed in a funnel shape or a funnel shape similar to a funnel shape so that the internal fly ash H naturally descends by gravity. Further, a vibration source may be attached to the funnel portion or the sloped portion of the lower portion of the hopper portion 20 to reliably prevent the cross-linking phenomenon of the fly ash H.

The dosing unit 30 is disposed below the hopper portion 20 to allow the fly ash H in the hopper portion 20 to flow into the metering groove 60 of the addition amount determining device 2 . Further, the dosing unit 30 can cause the fly ash H in the hopper portion 20 to flow out at a constant flow rate. In other words, the dosing unit 30 causes the fly ash H in the hopper portion 20 to flow out by a predetermined weight at a constant flow rate, and supplies the fly ash H that has flowed out as the fly ash H1 for investigation to the addition amount determining device 2. In the dosing unit 30, for example, a screw feeder or a platform feeder capable of conveying powder or granules at a fixed flow rate can be used.

The control unit 50 exchanges signals with the control unit 67 of the added amount determining device 2, and causes the fly ash collecting unit 10 and the dosing unit 30 to perform various operations. That is, the control unit 50 causes the fly ash collecting unit 10 to operate at a predetermined timing, and stores the fly ash H in the hopper unit 20. Moreover, the control unit 50 causes the dosing unit 30 to perform an ON/OFF operation at various timings, and supplies the fly ash H1 for investigation of a predetermined weight to the addition amount determining device 2. Here, since the volume specific gravity of the fly ash H is known, when the quantitative supply unit 30 that has flowed out of the fly ash H at a fixed flow rate is operated for only a predetermined period of time, the fly ash H1 for investigation of a predetermined weight can be supplied to the addition amount determining device. 2.

However, only the fly ash H in the hopper portion 20 that is not used for investigation is discharged, and the fly ash collecting portion 10 can accumulate the newly sampled fly ash H in the hopper portion 20. Therefore, in association with the operation of the automatic sampling device 1 by the control unit 50, in the additive amount determining device 2, as shown in FIG. 4, a first pass is provided between the discharging step M2 and the cleaning step M3. Step N1, standby step N2, and second pass step N3. In the first passage step N1 and the second passage step N2, the fly ash H that has not been used for investigation from the quantitative supply unit 30 is passed through the metering tank 60 and the discharge line 66 of the additive amount determining device 2, and is discharged to the kneading machine. K. Further, in the standby step N2, a fixed standby time is set between the first passing step N1 and the second passing step N3.

In other words, the control unit 50 discharges all of the fly ash H remaining in the hopper portion 20 after the investigation fly ash H1 flows out to the addition amount determining device 2 side by the quantitative supply unit 30 in accordance with the first passage step N1. In addition, the control unit 50 operates the dosing unit 30 immediately after storing the new fly ash H in the hopper unit 20 in accordance with the second passage step N2, and causes the hopper portion to be in a period before the fly ash H flows out at a constant flow rate. The fly ash H in 20 is discharged to the side of the addition amount determining device 2. Further, the control unit 50 causes the fly ash collecting unit 10 to store the new fly ash H in the fly ash chute Y in the hopper portion 20 in accordance with the standby step N2.

Each of the devices of the added amount determining device 2 is sequentially set by the control unit 67 to execute the first pass mode of the first pass step N1, the standby mode of the execution standby step N2, and the second pass mode of the second pass step N3. The state of each machine in the first passage mode and the second passage mode is the same as that in the cleaning mode, and water is supplied from the water supply unit 62 so as to be discharged into the metering tank 60, and the discharge solenoid valve 65 is opened. In the first passage mode and the second passage mode, unnecessary substances such as fly ash H taken into the measuring tank 60 are discharged to the kneading machine K side through the measuring tank 60 and the drain line 66. Further, the state of each device in the standby mode may be the same as that in the first pass mode or the second pass mode, or the discharge solenoid valve 65 may be kept open, and the water supply unit 62 may be stopped.

In the automatic sampling device 1, as shown in FIG. 5, four operations, that is, fly ash supply operation P2, residual fly ash discharge operation P4, fly ash storage operation P6, and initial fly ash discharge operation are repeatedly performed in this order. P8. Therefore, the operation of the automatic sampling device 1 will be described with reference to Fig. 5 while explaining the operations.

Each device of the addition amount determining device 2 starts the fly ash supply operation P2 when the self-addition amount determining device 2 receives the notification P1 that the content is switched to the sample preparation mode in which the sample preparation step M1 is executed. In other words, the dosing unit 30 is operated for only a predetermined period of time, and the fly ash H in the hopper unit 20 is discharged at a constant flow rate by only a predetermined weight as the investigation fly ash H1, and the investigation fly ash H1 is supplied to the addition amount determining device. 2. Further, when the fly ash supply operation P2 ends, the above-described subject matter is transmitted to the addition amount determining device 2. Next, the addition amount determining device 2 proceeds to the first passage step N1 via the measurement step M1 and the discharge step M2. In addition, each device of the addition amount determining device 2 starts the residual fly ash discharge operation P4 when the received content is the notification P3 of the first passage mode in which the first passage step N1 is executed. In other words, the quantitative supply unit 30 is operated for only a predetermined period of time, and all the fly ash H remaining in the hopper unit 20 is discharged to the kneading machine K side by the addition amount determining device 2. As a result, the inside of the hopper portion 20 becomes empty. Then, when the residual fly ash discharge operation P4 ends, the above-described subject matter is transmitted to the addition amount determining device 2.

Next, the addition amount determining means 2 proceeds to the standby step N2. Further, each of the devices of the added amount determining device 2 starts the fly ash storage operation P6 when the notification P5 of the standby mode in which the content is switched to the execution standby step N2 is received. That is, the fly ash collecting unit 10 operates to store the new fly ash H in the fly ash chute Y in the hopper portion 20. Further, when the fly ash storage operation P6 ends, the subject matter is transmitted to the addition amount determining device 2.

Next, the added amount determining device 2 proceeds to the second passing step N3. Further, each device of the addition amount determining device 2 starts the initial fly ash discharge operation P8 when the received content is the notification P7 of the second passage mode in which the second passage step N3 is executed. In other words, the dosing unit 30 performs the operation, and the fly ash H flowing out of the dosing unit 30 is discharged to the kneading machine by the addition amount determining device 2 while the fly ash H newly stored in the hopper portion 20 flows out at a constant flow rate. K side. At this time, when the quantitative supply unit 30 realizes a fixed flow rate, that is, when the predetermined time is operated, the quantitative supply unit 30 stops operating, and the initial fly ash discharge operation P8 ends. Moreover, the subject matter is transmitted to the addition amount determining device 2. Next, the addition amount determining device 2 proceeds to the sample preparation step M1 through the washing step M4 and the water filling step M5. Further, each device of the addition amount determining device 2 receives the notification P1 of switching to the sample preparation mode in which the sample preparation step M1 is executed.

As described above, in the automatic sampling device 1, the fly ash H1 in the hopper portion 20 sampled from the fly ash chute Y is discharged by the quantitative supply unit 30, and the fly ash H1 for investigation can be supplied. Since the amount determining device 2 is added, simplification and cost reduction of the device can be achieved.

Further, in the automatic sampling device 1, the fly ash H in the hopper portion 20 that is not used for investigation is discharged to the addition amount determining device 2 by the quantitative supply unit 30 for each sampling of the fly ash H. side. Therefore, in the automatic sampling device 1, even if the sampling of the fly ash H is repeated, it is possible to prevent the new fly ash from being mixed with the previous fly ash in the hopper portion 20. Further, at this time, the processing of the fly ash H that is not used for the investigation can be easily and surely completed by the addition amount determining device 2.

Further, in the automatic sampling device 1, the quantitative supply unit 30 is operated in advance to prepare the supply of the fly ash H1 for investigation until the dosing unit 30 can flow the fly ash H in the hopper portion 20 at a constant flow rate. Therefore, the investigation fly ash H1 can be accurately supplied to the addition amount determining device 2 in a sufficient amount.

Next, the fly ash automatic sampling method will be described. As shown in FIG. 5, the fly ash automatic sampling method includes a fly ash supply step Q1 for matching the sample preparation mode switching notification P1 with the fly ash supply operation P2, and a residual fly ash discharge step Q2 for making the first The mode switching notification P3 is matched with the residual fly ash discharge operation P4; the fly ash storage step Q3 causes the standby mode switching notification P5 to cooperate with the fly ash storage operation P6; and the initial fly ash discharge step Q4 to make the first 2 The mode notification P7 is matched with the initial fly ash discharge operation P8. Further, in the fly ash automatic sampling method, the fly ash supply step Q1, the residual fly ash discharge step Q2, the fly ash storage step Q3, and the initial fly ash discharge step Q4 are repeatedly performed in this order.

In the fly ash supply step Q1, when the respective devices of the additive amount determining device 2 become the sample preparation mode for collecting the fly ash H, the dosing unit 30 that can flow the fly ash H in the hopper portion 20 at a constant flow rate will The fly ash H in the hopper portion 20 that has flowed out only a predetermined amount at a fixed flow rate is supplied to the additive amount determining device 2 as the fly ash H1 for investigation. In the residual fly ash discharge step Q2, after the fly ash supply step Q1, the respective machines of the addition amount determining device 2 become the first passage mode in which the fly ash H taken in to the outside is discharged and discharged to the outside, and the amount is quantified. The supply unit 30 causes all the fly ash H remaining in the hopper portion 20 flowing out of the hopper portion 20 to flow into the addition amount determining device 2 and discharge it.

In the fly ash storage step Q3, when the respective devices of the added amount determining device 2 are in the standby mode after the residual fly ash discharging step Q2, the fly ash collecting portion 10 slides the fly ash from the fly ash H downward. The fly ash H sampled by the tank Y is temporarily stored in the hopper portion 20. In the initial fly ash discharge step Q4, after the fly ash storage step Q3, the respective machines of the added amount determining device 2 become the second pass mode in which the fly ash H taken in to the inside is passed and discharged to the outside, and the amount is quantified. The supply unit 30 causes the fly ash H stored in the hopper portion 20 to flow out before the fixed flow rate is reached, and flows into the addition amount determining device 2 to be discharged. Further, in the fly ash automatic sampling method, the same effect as the automatic sampling device 1 can be obtained.

Further, in the additive amount determining device 2, the concentration of the drug in the slurry is grasped by the oxidation-reduction potential (ORP), but the colorimetric method using the colorimetric reagent may be used to grasp the slurry. The concentration of the agent. Further, since the concentration of the drug in the slurry depends on the pH (pH), the concentration of the drug in the slurry can be grasped by the pH.

Further, the control unit 50 and the control unit 67 may be integrated, and the automatic sampling device 1 and the added amount determining device 2 may be controlled by a common control unit.

Next, a specific example of the fly ash collecting unit 10, the hopper unit 20, and the dosing unit 30 will be described with reference to Figs. 6 to 8 . Here, the fly ash collecting unit 10 is a batch type member that advances and retreats the inclined cylindrical groove 13 opened upward with respect to the fly ash chute Y, and the dosing unit 30 continuously feeds at a constant flow rate. The component of the spiral feed type of ash H.

As shown in FIG. 6, the fly ash collecting unit 10 includes a box-shaped relief portion 11 that is attached to the side of the fly ash chute Y so as to be connected to the fly ash chute Y; a funnel-shaped guide The portion 12 is attached to the lower portion of the evacuation portion 11 so as to be connected to the inside of the evacuation portion 11, and guides the fly ash H to the hopper portion 20; the inclined tubular groove 13 receives the fly in the fly ash chute Y. Ash H, and the fly ash H is slid down to the guide portion 12; and an air cylinder 14 is advanced and retracted into the fly ash chute Y and the retraction portion 11.

The air cylinder 14 is attached to the end plate 11a of the evacuation portion 11 in this state. Further, the piston portion 14a of the air cylinder 14 is attached to the oblique tubular groove 13 at its end. The inclined tubular groove 13 is normally retracted into the escape portion 11, but enters the fly ash chute Y by the operation of the cylinder 14, and is retracted into the escape portion 11 after a fixed period of time.

As shown in FIGS. 7 and 8, the quantitative supply unit 30 includes a screw shaft 31 having a spiral blade wound around the shaft portion, a cylindrical portion 32 covering the screw shaft 31, and a pair of bearing portions 33 for supporting the screw shaft 31. The motor 34 rotates the screw shaft 31, and the direction changing unit 35 changes the direction of the fly ash H flowing out from the end of the tubular portion 32 at a constant flow rate to the lower direction. As shown in FIG. 6, the motor 34 side of the tubular portion 32 is opened at the upper portion, and the take-in portion 32a of the fly ash H is formed therein. Further, a hopper portion 20 is attached to the side of the take-in portion 32a of the tubular portion 32.

As shown in FIG. 6, the hopper portion 20 is formed in a diagonal shape so as to be spread upward from the take-in portion 32a along the left and right sides of the screw shaft 31 of the quantitative supply portion 30. Therefore, the hopper portion 20 can store a sufficient amount of fly ash H above the take-in portion 32a of the dosing portion 30. The upper portion of the hopper portion 20 is partially closed by a lid portion 20a that is connected to the guide portion 12 of the fly ash collecting portion 10.

When the respective machines of the additive amount determining device 2 are switched to the sample preparation mode, the dosing unit 30 rotates the screw shaft 31 at a fixed speed for only a predetermined period of time, and uses the fly ash H flowing out at a constant flow rate as the fly ash H1 for investigation, and only The predetermined weight is supplied to the addition amount determining device 2. When the respective devices of the additive amount determining device 2 are switched to the first pass mode, the dosing unit 30 rotates the screw shaft 31 for only a predetermined period of time, and discharges all the fly ash H remaining in the hopper portion 20 to the added amount determination. Device 2 side. Next, when the respective machines of the added amount determining device 2 are switched to the standby mode, the fly ash collecting portion 10 causes the cylinder 14 to operate, and moves the inclined tubular groove 13 into the fly ash chute Y, and from the fly ash chute Y. Inside, the fly ash H that has flowed in the inclined tubular groove 13 is moved into the hopper portion 20. Further, when a substantially required amount of fly ash H is stored in the hopper portion 20, that is, when the inclined cylindrical groove 13 is moved to the fly ash chute Y and a predetermined time elapses, the fly ash collecting portion 10 causes the cylinder 14 to operate. The inclined tubular groove 13 is moved into the evacuation portion 11.

Next, when the respective machines of the additive amount determining device 2 are switched to the second pass mode, the dosing unit 30 rotates the screw shaft 31 at a fixed speed to cause the fly ash H in the hopper portion 20 to flow out at a fixed flow rate. During this period, it is discharged to the side of the addition amount determining device 2. Further, the dosing unit 30 stops the rotation of the screw shaft 31 when the screw shaft 31 rotates for a predetermined time and the fly ash H flows out at a constant flow rate.

However, the fly ash collection unit 10 may be a damper type member as shown in FIG. The fly ash collecting unit 10 includes a baffle 15 which is disposed in the fly ash chute Y, and the upper end side is swingable about a lower end portion 15a located near the inner surface of the side wall Y1; a duct 16 is provided On the lower end portion 15a side of the baffle 15, the fly ash H collected along the baffle 15 is carried out to the outside of the fly ash chute Y, and a drive source (not shown) oscillates the baffle 15. When the fly ash H is sampled by the fly ash collecting unit 10, the baffle 15 is swung obliquely across the fly ash chute Y to cause the fly ash to fall in the fly ash chute Y. H may be collected along the baffle 15 on the side of the opening 16a of the duct 16. Further, when the fly ash H is not sampled, as shown by the two-dot chain line, the baffle 15 is swung so as to extend along the side wall Y1 of the fly ash chute Y, and the opening of the duct 16 is blocked by the baffle 15. 16a can be.

Further, the fly ash collecting unit 10 may advance and retreat the fly ash container 17 having the upper opening as shown in FIG. 10 into the fly ash chute Y and the retracting portion 18, and rotate the fly ash container 17 downward to In the evacuation unit 18, the fly ash H in the fly ash container 17 is dropped downward.

Further, the fly ash collecting unit 10 may be a screw feeder 100 as shown in FIG. In the screw feeder 100, a discharge port 101d for discharging the fly ash H in the conveyance unit 101 is provided in a lower portion of the tubular portion 101b of the conveyance unit 101. When the new fly ash H is sampled by the screw feeder 100, the old fly ash H in the transport unit 101 may be discharged from the discharge port 101d into the fly ash chute Y by rotating the screw shaft 101a in the reverse direction.

Further, the quantitative supply unit 30 may be a platform feeder as shown in FIGS. 11 and 12 . The dosing unit 30 is coaxial with the disc 37 above the disc 37, which is a platform that can be rotated at a fixed speed around the vertical axis L by the motor 36, and is spaced apart from the disc 37 by a gap D. Further, a cylindrical fly ash supply unit 38 is provided. Further, the dosing unit 30 is provided with a scraper 39 that is slid on the upper surface of the disc 37, and the scraper 39 fixes one end to the fly ash supply unit 38 and crosses the disc 37. The other end side is fixed to the fly ash outflow portion 40 outside the circular plate 37. Further, a hopper portion 20 is attached to the fly ash supply portion 38 of the dosing unit 30. The fly ash H in the hopper portion 20 flows out from the gap D below the fly ash supply portion 38 to the circular plate 37, and the fly ash H slides on the circular plate 37 by the rotation of the circular plate 37 and is guided to The stationary blade 39 is collected in the fly ash outflow portion 40. At this time, since the disk 37 is rotated at a constant speed, the fly ash H on the disk 37 is transported to the fly ash outflow portion 40 at a constant flow rate.

Here, in Fig. 12, reference numeral 41 denotes a substrate on which the motor 36 is attached and which supports and rotates the disk 36, and reference numeral 42 denotes a cylindrical cover which is attached to the peripheral portion of the substrate 41. . Further, reference numeral 43 is an upper plate covering the upper portion of the cover 42, and reference numeral 44 is an anti-crosslinking bar.

Further, when the predetermined amount of fly ash H is supplied from the quantitative supply unit 30 to the addition amount determining device 2, the rotation time of the screw shaft 31 or the disk 37 that is rotated at a fixed speed may not be controlled, and the rotation time may be controlled. The number of rotations of the screw shaft 31 or the circular plate 37 is controlled. Example

Next, the fly ash H is actually sampled by the sampling device using the fly ash collecting unit 10, the hopper portion 20, and the dosing unit 30 shown in FIGS. 6 to 8 to collect the fly ash H1 for investigation of a predetermined weight. The results are explained.

[Specification of Machine and Fly Ash to Be Tested] a. The running time of the cylinder 14 is adjusted so that about 200 g of fly ash H can be collected at one time by the fly ash collecting portion 10. b. The capacity of the hopper portion 20 is 2 L. c. The dosing unit 30 can perform flow rate adjustment in the range of 0.04 L/Hr to 18 L/Hr. d. The fly ash to be tested is the incineration fly ash of municipal waste. [Test Method] a. The fly ash collecting unit 10 was used a plurality of times, and about 200 g of fly ash H was put into the hopper unit 20. b. Before the collection fly ash H1 is collected, the dosing unit 30 is operated for a predetermined period of time, and it is confirmed that the dosing unit 30 causes the fly ash H in the hopper portion 20 to flow out at a substantially constant flow rate. c. The screw shaft 31 of the dosing unit 30 was operated at a rotational speed of 40 rpm for 60 seconds so that 20 g of the investigation fly ash H1 could be collected each time. The investigation fly ash H1 was received in a container, and its weight was measured using an electronic balance. d. The collection operation of the fly ash H1 was repeated 20 times, and the average weight, the standard deviation, and the coefficient of variation (CV = standard deviation / average weight) were calculated as shown in Table 1 below. [Test Results] are shown in Table 1 below.

[Table 1]

As described above, the coefficient of variation (CV) was 0.61%, and it was confirmed that the sampling fly ash H1 of the predetermined weight can be accurately collected by the sampling device.

1‧‧‧Automatic sampling device
2‧‧‧Addition amount determining device
10‧‧‧fly ash collection department (collection department)
11, 18‧‧ ‧ evasion department
11a‧‧‧End plate
12‧‧‧ Guidance Department
13‧‧‧ Oblique groove
14‧‧‧ cylinder
14a‧‧‧Piston Department
15‧‧ ‧Baffle
15a‧‧‧Bottom
16‧‧‧ catheter
16a‧‧‧ Opening
17‧‧‧ fly ash container
20‧‧‧ hopper department
20a‧‧‧Cap
30‧‧‧Quantity Supply Department
31‧‧‧Spiral axis
32‧‧‧ Tube
32a‧‧‧Intake Department
33‧‧‧ Bearing Department
34, 36‧‧ ‧ motor
35‧‧‧ Direction Change Department
37‧‧‧ round board
38‧‧‧Fly Ash Supply Department
39‧‧‧Scraper
40‧‧‧ fly ash outflow
41‧‧‧Substrate
42‧‧‧ Cover
43‧‧‧ upper board
44‧‧‧Anti-crosslinking rod
50‧‧‧Control Department
60‧‧‧ metering tank
61‧‧‧Pharmaceutical Supply Department
62‧‧‧Water Supply Department
63‧‧‧Mixer
64‧‧‧Sensor Department
65‧‧‧Exhaust solenoid valve
66‧‧‧Drainage routes
67‧‧‧Control Department
67a‧‧‧Operational Transmission Department
100‧‧‧Spiral feeder
101‧‧‧Transportation Department
101a‧‧‧Spiral axis
101b‧‧‧ Tube
101c‧‧‧ collection port
101d‧‧‧Export
B‧‧‧ bag filter
C‧‧‧ conveyor belt
D‧‧‧ gap
E‧‧ ‧ chimney
F‧‧‧Quantum feeder
G‧‧‧ combustion gases
H‧‧‧ fly ash
H1‧‧‧Investigation fly ash
K‧‧‧Machine
L‧‧‧ axis
M1‧‧‧ sample preparation steps
M2‧‧‧ Determination procedure
M3‧‧‧Exporting steps
M4‧‧‧ cleaning steps
M5‧‧‧ water filling step
N1‧‧‧1st step
N2‧‧‧ standby steps
N3‧‧‧Step 2
P1‧‧‧ Switch to notification of sample preparation mode
P2‧‧‧ fly ash supply operation
P3‧‧‧Notice to switch to the first pass mode
P4‧‧‧ residual fly ash discharge operation
P5‧‧‧Notice to switch to standby mode
P6‧‧‧ fly ash storage operation
P7‧‧‧ Switch to the second pass mode notification
P8‧‧‧Initial fly ash discharge operation
Q1‧‧‧ fly ash supply step
Q2‧‧‧Residual fly ash discharge step
Q3‧‧‧ fly ash storage steps
Q4‧‧‧Initial fly ash discharge step
S‧‧‧ fly ash storage bin
T‧‧‧ supply device
X‧‧‧Control device
Y‧‧‧ fly ash chute
Y1‧‧‧ side wall

Fig. 1 is a view showing a flow from generation to disposal of fly ash. Fig. 2 is a view showing details of an automatic sampling device and an added amount determining device. Fig. 3 is a view showing an operational procedure of the addition amount determining device when it is not associated with the automatic sampling device. 4 is a view showing an operational procedure of the addition amount determining device when it is associated with the automatic sampling device. Fig. 5 is a view for explaining the operation of the automatic sampling device. Fig. 6 is a side sectional view showing an automatic sampling device other than the control unit. Figure 7 is a cross-sectional view taken along line A-A of Figure 6; Figure 8 is a cross-sectional view taken along line B-B of Figure 6; Fig. 9 is a view showing another fly ash collecting unit of the automatic sampling device. Fig. 10 is a view showing another fly ash collecting unit of the automatic sampling device. Fig. 11 is a horizontal sectional view showing another quantitative supply unit of the automatic sampling device. Fig. 12 is a side cross-sectional view showing another quantitative supply unit and a hopper portion of the automatic sampling device. Fig. 13 is a view showing a conventional fly ash automatic sampling device.

1‧‧‧Automatic sampling device

2‧‧‧Addition amount determining device

10‧‧‧fly ash collection department (collection department)

20‧‧‧ hopper department

30‧‧‧Quantity Supply Department

50‧‧‧Control Department

60‧‧‧ metering tank

61‧‧‧Pharmaceutical Supply Department

62‧‧‧Water Supply Department

63‧‧‧Mixer

64‧‧‧Sensor Department

65‧‧‧Exhaust solenoid valve

66‧‧‧Drainage routes

67‧‧‧Control Department

67a‧‧‧Operational Transmission Department

H‧‧‧ fly ash

H1‧‧‧Investigation fly ash

K‧‧‧Machine

Y‧‧‧ fly ash chute

Claims (4)

An automatic fly ash sampling device for supplying a fly ash to a quantity adding device for investigation by a predetermined amount in order to perform a process for detoxifying heavy metals in fly ash, the addition amount determining device pair being added to the The fly ash automatic sampling device is characterized in that: the collecting portion is configured to: carry out the fly ash from the fly ash chute that transports the fly ash downward Sampling; a hopper portion for temporarily storing the fly ash sampled by the collecting portion; and a dosing portion that allows the fly ash in the hopper portion to flow into the additive amount determining device, and the hopper The fly ash in the portion flows out at a fixed flow rate; and the control unit causes the dosing unit to make the inside of the hopper portion when the respective devices of the added amount determining device become the sample preparation mode for receiving the fly ash The fly ash flows out at a fixed flow rate by only a predetermined amount as the fly ash for investigation, and supplies the fly ash for investigation to the added amount determining device, and the machine of the added amount determining device changes When the fly ash taken in and taken out to the outside passes through the first passage mode and the second passage mode, the quantitative supply unit is caused to remain in the hopper portion in the first passage mode. All of the fly ash flows out, and in the second passage mode, the fly ash stored in the hopper portion is preliminarily flowed out before the fixed flow rate is realized by the dosing unit, and is not used. The fly ash in the hopper portion of the investigation is discharged via the addition amount determining device, and each device of the addition amount determining device changes between the first passage mode and the second passage mode In the standby mode, the collecting unit causes the fly ash from the fly ash chute to be stored in the hopper portion. The fly ash automatic sampling device according to claim 1, wherein the quantitative supply unit is a screw feeder or a platform feeder. The fly ash automatic sampling device according to claim 2, wherein the control unit sets a screw shaft or a screw of the screw feeder that rotates at a fixed speed based on a volume specific gravity of the fly ash measured in advance. The number of rotations or the rotation time of the platform of the platform feeder is such that a predetermined weight of the fly ash can be supplied. An automatic fly ash sampling method for supplying a fly ash to a addition amount determining device for investigation by a predetermined amount in order to perform a process for detoxifying heavy metals in fly ash, the addition amount determining device pair being added to the A suitable addition amount of the heavy metal fixing agent in the fly ash is characterized in that the fly ash automatic sampling method includes: a fly ash supply step, when each machine of the addition amount determining device becomes a collection of the fly ash In the sample preparation mode, the dosing ash in which the fly ash in the hopper portion flows out at a fixed flow rate is supplied to the fly ash in the hopper portion at a fixed flow rate by a predetermined amount as the fly ash for investigation. The additive amount determining device; the residual fly ash discharging step, after the fly ash supplying step, the respective machines of the added amount determining device are configured to pass the fly ash taken in to the inside and discharge to the outside In the pass mode, the dosing unit causes all of the fly ash remaining in the hopper portion flowing out of the hopper portion to flow into the addition amount determining device to be discharged. a fly ash storage step, after the residual fly ash discharge step, when each machine of the added amount determining device changes to a standby mode, the fly ash chute that transports the fly ash downward is used by the collecting unit And the sampled fly ash is temporarily stored in the hopper portion; and an initial fly ash discharge step, after the fly ash storage step, the machines of the added amount determining device become said to be taken into the interior When the fly ash passes through and is discharged to the external second pass mode, the dosing unit causes the fly ash stored in the hopper portion to flow out before the fixed flow rate is realized to flow into the added amount determining device And to discharge.