JP6795230B1 - Quality control method for coal ash mixed materials - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coal ash mixed material quality control system capable of producing a coal ash mixed material while suppressing elution of heavy metals and without impairing economic efficiency even when coal ash having various properties is used as a raw material. SOLUTION: A coal ash mixed material quality control system has a property recognition unit for recognizing the properties of coal ash, a plurality of coal ash storage units, a storage unit, and the coal ash mixture discharged from the coal ash storage unit. It is provided with a determination unit for determining the amount of the coal ash emitted as a raw material of the material for each of the coal ash storage units. The determination unit is set so that the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the coal ash emission amount determined by the determination unit is equal to or less than the predetermined upper limit. It is configured to determine the emission amount. [Selection diagram] Fig. 1

Description

The present invention relates to a method of controlling the quality of a coal ash composite material.

Conventionally, a system for controlling the quality of a coal ash mixed material has been proposed (see Patent Document 1).

JP-A-2002-211968

Coal ash, which is a raw material for a coal ash mixed material produced by mixing cement, water, additives and the like with coal ash as needed, contains a trace amount of heavy metals. The coal ash mixed material is required to be manufactured so that heavy metals exceeding environmental standards are not eluted.

In addition, coal-fired power plants, which are the main source of coal ash, use various types of coal from different countries of origin and mines, and their composition components differ depending on the type of coal. Therefore, the properties of the coal ash produced from the coal, that is, the types and amounts of heavy metals contained, for example, vary, and the types and amounts of heavy metals that may be eluted from the coal ash also vary.

As a method of suppressing the elution of heavy metals caused by coal ash, it is conceivable to increase the amount of additives added during the production of the coal ash mixed material, or to increase the amount of cement to be mixed.

According to the system of Patent Document 1, when an additive such as lime or gypsum is added to coal ash and kneaded with water to produce a coal ash mixed material, R _{2 of} coal ash collected from a coal ash silo. The quality of the produced coal ash mixed material is controlled by controlling the amount of additives such as lime and gypsum to be added based on the amount of O and the like.

However, since additives and cement are more expensive than coal ash, if the amount of additives or cement is increased, there arises a problem that the production cost of the coal ash mixed material increases and the economic efficiency is impaired.

Therefore, the present invention provides a quality control method for a coal ash mixed material capable of producing a coal ash mixed material while suppressing the elution of heavy metals and without impairing economic efficiency even when coal ash having various properties is used as a raw material. The purpose is to provide.

The quality control method for the coal ash mixed material of the present invention is
In a method of controlling the quality of a coal ash mixed material produced by mixing raw materials containing coal ash using a coal ash mixed material quality control system.
The quality management system includes a property recognition unit, a plurality of coal ash storage units for storing the coal ash, a storage unit, and a determination unit.
A step in which the property recognizing unit recognizes the properties of the coal ash including the type of a predetermined heavy metal contained in the coal ash which is the raw material of the coal ash mixed material and the content of the heavy metal.
The coal ash storage unit is one of the plurality of coal ash storage units, in which the coal ash whose properties are recognized are mixed with the coal ash having different properties, and the coal ash having different properties is not mixed. The storage process of arranging and storing in the order in which they are stored in
A step of storing the properties and amount of coal ash recognized by the property recognizing unit and which of the coal ash storage units the storage unit is stored in for each unit stored in the coal ash storage unit.
The determination unit stores the properties of the coal ash next to be discharged from each of the plurality of coal ash storage units including the coal ash storage unit that stores the coal ash having different properties in a mixed manner from the storage unit. The amount of the coal ash that is acquired and discharged from the coal ash storage unit and used as a raw material for the coal ash mixed material is determined for each of the plurality of coal ash storage units based on the acquired properties. Including the decision process,
In the determination step, the determination unit determines in advance the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the emission amount of the coal ash determined by the determination unit. It is characterized in that the emission amount is determined so as to be equal to or less than the upper limit of the content.

According to the quality control method for the coal ash mixed material of the present invention, the property recognizing unit indicates that the coal ash contains a predetermined type of heavy metal contained in the coal ash as a raw material of the coal ash mixed material and the content of the heavy metal. The properties are recognized.
Then, by any of the plurality of coal ash storage units, the coal ash whose properties are recognized may be mixed with the coal ash having different properties, and the coal ash having different properties may not be mixed in the coal ash storage unit. They are arranged and stored in the order in which they are stored.

Then, depending on the determination unit, the coal ash is mixed based on the properties of the coal ash next to be discharged from each of the plurality of coal ash storage units including the coal ash storage unit that stores the coal ash having different properties in a mixed manner. Emissions of the coal ash used as a raw material for the material are determined for each coal ash reservoir.

In addition, the emission amount is determined by the determination unit so that the content of a predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the emission amount is equal to or less than a predetermined upper limit amount. Will be done.

As a result, the heavy metal content of the coal ash in the coal ash storage section, which has a high heavy metal content to be discharged next, is mixed with the coal ash in the coal ash storage section, which has a low heavy metal content. It is possible to reduce the content of heavy metals as compared with the case where only the coal ash of the coal ash storage part having a large amount of fly ash is used. As a result, the amount of the additive for suppressing the elution of heavy metals can be reduced, so that the increase in manufacturing cost can be suppressed, which is economical.

Further, since the content of the predetermined heavy metal contained in the coal ash is determined to be equal to or less than the predetermined upper limit of the content, it is possible to suppress the elution of the heavy metal from the coal ash mixed material.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, the coal ash mixed material can be produced while suppressing the elution of heavy metals and without impairing the economic efficiency. can do.

In the quality control method of the coal ash mixed material of the present invention,
In the determination step, the determination unit is manufactured using coal ash obtained when the coal ash is discharged according to the emission amount of the coal ash determined by the determination unit based on the properties obtained from the storage unit as a raw material. The amount of heavy metal eluted from the coal ash mixed material is estimated, and the estimated amount of elution from each of the plurality of coal ash storage portions is equal to or less than a predetermined upper limit of elution. and Turkey to determine the emissions are preferred.

In the quality control method for the coal ash mixed material of the present invention, the coal ash obtained when the coal ash is discharged according to the coal ash emission amount determined by the determination unit based on the properties acquired from the storage unit by the determination unit. The amount of heavy metal eluted from the coal ash mixed material when manufactured using it as a raw material is estimated.

Then, the determination unit determines the emission amount from each coal ash storage unit so that the estimated elution amount is equal to or less than a predetermined elution upper limit amount.

As a result, the amount of heavy metals that will be eluted when produced using coal ash as a raw material, which is obtained when the coal ash is discharged according to the amount of coal ash discharged by the determination unit, is estimated in advance. Since the discharge amount is determined so that the elution amount is equal to or less than the predetermined elution upper limit amount, the certainty that the elution of heavy metals from the coal ash mixed material can be suppressed is increased.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, coal can be used while increasing the certainty of suppressing the elution of heavy metals and without impairing economic efficiency. An ash mixed material can be produced.

In the quality control method of the coal ash mixed material of the present invention,
The quality control system is provided with an elution amount receiving unit.
Prior to the determination step, the elution amount receiving unit is an elution test of the predetermined heavy metal performed on the coal ash mixed material produced by using the coal ash whose properties have been recognized as a raw material. a result of 1 elution test, receives an input of inspection result information including the amount of elution of the predetermined heavy metals, comprising the step of storing in the storage unit the solution volume in association with the property,
In the determination step, the determination unit acquires from the storage unit the properties of the coal ash next discharged from each of the plurality of coal ash storage units and the elution amount associated with the properties. based on the obtained properties and elution, and preferably benzalkonium to determine the emissions from each of the coal ash storage unit of the plurality of.

According to the quality control method for the coal ash mixed material of the present invention, a predetermined heavy metal elution test was performed on the coal ash mixed material produced by using the coal ash whose properties were recognized as a raw material by the elution amount receiving unit. The input of the information of the inspection result including the elution amount of the predetermined heavy metal is accepted, and is stored in the storage unit in association with the property.

Then, the determination unit acquires the properties of the coal ash next discharged from each coal ash storage unit and the elution amount associated with the properties from the storage unit, and based on the acquired properties and the elution amount, The amount of emissions from each coal ash reservoir is determined.

As a result, when a coal ash mixed material is actually manufactured and a predetermined elution test is performed, the elution amount of a predetermined heavy metal is taken into consideration to determine the emission amount from each coal ash storage portion. The certainty that the elution of heavy metals from the coal ash mixed material can be suppressed is increased.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, coal can be used while increasing the certainty of suppressing the elution of heavy metals and without impairing economic efficiency. An ash mixed material can be produced.

In the quality control method of the coal ash mixed material of the present invention,
The storage unit stores the price of the coal ash and the price of the additive for suppressing the elution of a predetermined heavy metal from the coal ash mixed material.
In the determination step, the determination unit determines the amount of the additive based on the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the emission amount. and emissions and Turkey to determine the amount of exhaust emissions and the additive so that the total price of該石ash and the additive based on the amount of the additive is equal to or less than a predetermined maximum amount is preferable.

According to the quality control method for the coal ash mixed material of the present invention, the price of each raw material of the coal ash mixed material containing coal ash and additives is stored in the storage unit.

Then, the determination unit determines the amount of the additive based on the content of a predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the discharge amount, and the discharge amount and the additive. The amount of the emission and the amount of the additive are determined so that the total price of the coal ash and the additive based on the amount of the coal ash is equal to or less than a predetermined upper limit amount.

As a result, the price of the raw material of the coal ash mixed material can be suppressed, which is economical.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, the elution of heavy metals can be suppressed and the highly economical coal ash mixed material can be produced. Can be done.

In the quality control method of the coal ash mixed material of the present invention,
The quality control system is equipped with a simulation unit.
Prior to said storing step, the simulation unit, wherein stored in the coal ash storage unit based on the nature and amount of the coal ash, future該石ash from each of the plurality of the coal ash storage unit Includes a simulation process that simulates the amount and order of coal emissions
The simulation unit will perform the future coal so that the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the simulation result of the simulation unit is equal to or less than the upper limit of the content. to simulate the emissions and emission order of the ash,
Prior to the storage step, the determination unit is then stored based on the simulation results of the simulation unit and then the properties and amount of the coal ash stored in the coal ash storage unit. I preferred it to contain that determine the coal ash storage unit for storing the coal ash selected from the plurality of the coal ash storage process.

According to the quality control method of the coal ash mixed material of the present invention, the simulation unit determines the future coal ash from each of the coal ash storage units based on the properties and amount of the coal ash stored in the coal ash storage unit. Emission amount and emission order are simulated.

In addition, in the future coal ash emission amount and emission order, the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the simulation result is set in advance by the simulation unit. It is simulated as follows.

Then, based on the simulation result of the simulation unit and the properties and amount of coal ash stored in the coal ash storage unit, the determination unit has a plurality of coal ash storage units for storing the coal ash stored next. It is selected and determined from the coal ash storage area of.

As a result, coal is simulated at the time of storing the fly ash so that the fly ash can be continuously discharged so that the content of the predetermined heavy metal contained in the fly ash will be less than the upper limit of the content in the future. Since the coal ash is stored in the ash storage part, there is a certainty that the coal ash can be discharged so that the content of the predetermined heavy metal contained in the coal ash is equal to or less than the upper limit of the content when the coal ash is actually discharged. Increase.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, coal can be used while increasing the certainty of suppressing the elution of heavy metals and without impairing economic efficiency. An ash mixed material can be produced.

In the quality control method of the coal ash mixed material of the present invention,
The quality management system includes a other raw material storage unit for storing a plurality of other raw materials which are raw materials other than the coal ash of the coal ash mixed material, an emission control unit, and a kneading unit.
The emission control unit discharges the coal ash from each of the plurality of coal ash storage units based on the determination result in the determination step , and from the other raw material storage unit according to the amount of the discharged coal ash. The process of discharging a plurality of the other raw materials and
It is preferable that the kneading portion includes a step of accepting and kneading the discharged coal ash and the other raw materials.

According to the quality control method for the coal ash mixed material of the present invention, the emission control unit discharges coal ash from each coal ash storage unit based on the determination result of the determination unit, and the discharged coal ash It is controlled so that a plurality of other raw materials are discharged from the other raw material storage unit according to the amount. Then, the kneading section accepts and kneads the discharged coal ash and other raw materials.

As a result, the raw materials of the coal ash mixed material are automatically discharged and kneaded based on the decision result of the determination unit, so that the coal ash mixed material is surely produced as determined.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, the coal ash mixed material in which the elution of heavy metals is suppressed is surely produced and economical. A coal ash mixed material can be produced without impairing the properties.

In the quality control method of the coal ash mixed material of the present invention,
The quality control system includes a spray unit and
The content of the predetermined heavy metal contained in the coal ash obtained when the spray unit discharges the coal ash according to the discharge amount of the coal ash determined by the determination unit in the determination step is a predetermined threshold value. If it is more, the propellant for suppressing the elution of the predetermined heavy metals, it is preferred to include a step of spraying the coal ash mixed material produced on the basis of the determination result of the determining unit.

Depending on the content of heavy metals contained in the coal ash, it may be necessary to spray a stabilizer or the like on the coal ash mixed material produced by using the coal ash as a raw material.

According to the quality control method of the coal ash mixed material of the present invention, the content of a predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the discharge amount of the coal ash by the spraying portion is predetermined. when the threshold value or more, sprays for suppressing the elution of the predetermined heavy metals, is mists coal ash mixed material produced on the basis of the determination result of the determining unit.

Thus, when the amount of a given heavy metals contained in coal ash material is above a predetermined threshold value, sprays for suppressing the elution of certain heavy metals in the coal ash mixed material produced automatically Is sprayed on. Therefore, the certainty that a coal ash mixed material in which elution of a predetermined heavy metal is suppressed can be produced is increased.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, the certainty that the coal ash mixed material in which the elution of heavy metals is suppressed can be produced is increased. Moreover, the coal ash mixed material can be produced without impairing the economic efficiency.

In the quality control method of the coal ash mixed material of the present invention,
The quality control system includes a spray unit and
The determination unit is determined result has been an elution test of the predetermined heavy metals was performed on the coal ash mixed material produced by using the coal ash as a raw material for the second elution test discharge based on the determination step a result, a step of accepting an input of a test result information including the amount of elution of the predetermined heavy metals,
The spray unit, when the amount of elution of the predetermined heavy metals the determining unit accepts is equal to or greater than the predetermined reference value, the propellant for suppressing the elution of the predetermined heavy metals, the determination result of the determination section It is preferable to include a step of spraying the coal ash mixed material produced based on the above.

According to the quality control method of the coal ash mixed material of the present invention, the predetermined heavy metal produced for the coal ash mixed material produced by using the coal ash discharged as a raw material from the coal ash discharged based on the determination result in the determination step by the determination unit. It is the result of the second dissolution test which is the dissolution test, and the input of the information of the test result including the elution amount of the predetermined heavy metal is accepted.
Then, when the elution amount of the predetermined heavy metal received by the determination unit is equal to or more than the predetermined reference value, the spray unit produced a spray agent for suppressing the elution of the predetermined heavy metal based on the determination result. Sprayed on coal ash mixture material.
Thus, in practice in the case of manufactures coal ash mixed material subjected to predetermined elution test, when the amount of elution of the predetermined heavy metals is not less than a predetermined reference value, predetermined in the coal ash mixed material produced A spray agent for suppressing the elution of heavy metals is automatically sprayed . Therefore, the certainty that a coal ash mixed material in which elution of a predetermined heavy metal is suppressed can be produced is increased.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, the certainty that the coal ash mixed material in which the elution of heavy metals is suppressed can be produced is increased. Moreover, the coal ash mixed material can be produced without impairing the economic efficiency.

In the quality control method of the coal ash mixed material of the present invention,
The quality control system includes an output unit.
Step the output unit, and outputs for each of the properties and units stored coal ash information stored in the coal ash storage unit of the plurality of indicating the amount of the coal ash stored in each of the plurality of the coal ash storage unit Including
The stored coal ash information is a plurality of bar graphs representing the properties and amounts of the coal ash stored in each of the plurality of coal ash storage units for each coal ash storage unit, and the bar graph is the plurality of coals. The properties and amounts of the coal ash stored in the ash storage unit for each unit are arranged and output in chronological order from one end to the other end of the bar graph in chronological order of storage in the coal ash storage unit. that it is preferable.

According to the quality control method of the coal ash mixed material of the present invention, the stored coal ash information indicating the properties and amount of the coal ash stored in each of the plurality of coal ash storage units is obtained by the output unit from the plurality of coal ash. It is output for each unit stored in the storage unit.

In addition, the properties and amounts of coal ash stored in the coal ash storage unit for each unit are arranged in chronological order from the time when they were stored in the coal ash storage unit and output as a bar graph.

As a result, the operator of the coal ash mixed material quality management system can visually and intuitively know what kind of coal ash and how much coal ash is stored in each of the plurality of coal ash storage units. .. Therefore, the operator of the coal ash mixed material quality management system can efficiently grasp the state of the coal ash in the coal ash storage unit.

As described above, according to the quality control method for the coal ash mixed material of the present invention, even if coal ash having various properties is used as a raw material, the operator can efficiently grasp the state of the coal ash in the coal ash storage unit while improving the efficiency. It is possible to produce a coal ash mixed material while suppressing the elution of heavy metals and without impairing economic efficiency.

The block diagram which shows the whole picture of the coal ash mixed material quality control system of this invention. The figure which shows the content of the data used for the processing by the coal ash mixed material quality control system of this invention. The flowchart which shows the processing content of the coal ash mixed material quality control system of this invention. The figure which shows the content of the data used for the processing by the coal ash mixed material quality control system of this invention. The image figure which shows the processing content of the coal ash mixed material quality control system of this invention. The figure which shows the output content of the coal ash mixed material quality control system of this invention.

<Structure of coal ash mixed material quality control system>
First, the configuration of the coal ash mixed material quality control system of the present embodiment will be described with reference to FIG. The same components may be designated by the same reference numerals and description thereof may be omitted.

The coal ash mixed material quality control system of the present embodiment is a system for controlling the quality of a coal ash mixed material produced by mixing raw materials containing coal ash, for example, a computer 10, a property recognition unit 30, and coal. It is configured to include an ash mixed material manufacturing plant 50.

The computer 10 includes a control unit 100, a storage unit 120, an input unit 140, and an output unit 160, for example, a personal computer or a server, or a tablet terminal or a smartphone.

The control unit 100 is composed of an arithmetic processing unit such as a CPU (Central Processing Unit), a memory, an I / O (Input / Output) device, and the like. The control unit 100 functions as, for example, a determination unit 101, an elution amount reception unit 103, a simulation unit 105, and an emission control unit 107 by reading and executing a predetermined program.

The determination unit 101 acquires the properties of the coal ash next discharged from each coal ash storage unit 500 from the storage unit, and based on the acquired properties, the coal ash discharged from the coal ash storage unit 500. The amount of the coal ash discharged as a raw material for the mixed material is determined for each of the coal ash storage units 500. In the determination unit 101, the content of a predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the emission amount of the coal ash determined by the determination unit 101 is equal to or less than a predetermined upper limit. It is configured to determine the emission amount so as to be.

Alternatively, the determination unit 101 determines that the content of a predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the coal ash emission amount determined by the determination unit 101 is equal to or higher than a predetermined threshold value. , The spray agent for suppressing the elution of the predetermined heavy metal may be configured to determine to spray the coal ash mixed material produced based on the determination result of the determination unit 101.

The elution amount receiving unit 103 receives the predetermined elution amount when the first elution test, which is the elution test of a predetermined heavy metal, is performed on the coal ash mixed material produced by using the coal ash whose properties have been recognized by the property recognition unit 30 as a raw material. The input of the elution amount of the heavy metal is received, for example, via the input unit 140, and is stored in the storage unit 120 in association with the properties.

The simulation unit 105 simulates the future discharge amount and discharge order of the coal ash from each of the coal ash storage units 500 based on the properties and the amount of the coal ash stored in the coal ash storage unit 500. Further, the simulation unit 105 will increase the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the simulation result of the simulation unit 105 to be equal to or less than the upper limit of the content of the coal ash in the future. It is configured to simulate emissions and emission order.

The discharge control unit 107 discharges coal ash from each coal ash storage unit 500 based on the determination result of the determination unit 101, and a plurality of other raw material storage units 520 depending on the amount of the discharged coal ash. Discharge raw materials.

The computer 10 and each of the coal ash storage unit 500 and each of the other raw material storage units 520 are communicably connected, for example, and each of the coal ash storage unit 500 and each of the other raw material storage units 520 is connected by the emission control unit 107. It is controlled to discharge coal ash and other raw materials based on the determination result of the determination unit 101.

The storage unit 120 is composed of storage devices such as a ROM (Read Only Memory), a RAM (Random Access Memory), and an HDD (Hard Disk Drive). The storage unit 120 stores, for example, the properties and amount of coal ash recognized by the property recognition unit 30 and which coal ash storage unit 500 is stored in each unit stored in the coal ash storage unit 500. ing.

As information indicating the properties and amount of the coal ash recognized by the property recognition unit 30 and which coal ash storage unit 500 is stored, for example, as shown in FIG. 2, the coal ash storage unit ID and the coal ash are used. Date and time of storage, name of power company and power plant from which the fly ash was brought in, remaining storage amount, vehicle number to be carried in, storage amount, heavy metal name as the property and amount of coal ash recognized by the property recognition unit 30 and its The predetermined elution test when the first elution test, which is the elution test of a predetermined heavy metal, is performed on a coal ash mixed material produced by using the content or the coal ash whose properties are recognized as a raw material in association with these. The amount of heavy metal eluted and the ph value of the eluate are stored.

The storage unit 120 stores, for example, the properties of the coal ash, etc., with the number of the coal ash carried in by the number of the carrying-in vehicle on the year, month, and day as one unit. Alternatively, a finer particle size such as the front half and the rear half of the coal ash carried in by the carry-in vehicle may be set as one unit.

The input unit 140 is, for example, a keyboard or a touch panel, a mouse, or other pointing device that receives input by an operator of the coal ash mixed material quality management system.

The output unit 160 may be, for example, a display or a printer that outputs information to the operator of the coal ash mixed material quality management system.

The property recognition unit 30 is an inspection device that recognizes the properties of the coal ash including a predetermined type of heavy metal contained in the coal ash as a raw material of the coal ash mixed material and the content of the heavy metal, and is, for example, fluorescent X-ray analysis. Although it is an apparatus, various other inspection apparatus may be used as the property recognition unit 30.

The coal ash mixed material manufacturing plant 50 is a plant that manufactures a coal ash mixed material, and is a coal ash storage unit 500, or further, another raw material storage unit 520, a kneading unit 540, a molding unit 560, a curing unit 580, and a crushing unit 600. It is configured to include a spray unit 620.

A plurality of coal ash storage units 500 are provided, each of which has a container unit 501 for storing coal ash whose properties have been recognized and a discharge unit 503 for discharging the stored coal ash, for example, coal. A silo for storing ash.

A plurality of other raw material storage units 520 are provided, and each of them is, for example, a tank or a silo that stores a plurality of other raw materials that are raw materials other than coal ash of the coal ash mixed material. The plurality of other raw materials include, for example, additives for suppressing elution of predetermined heavy metals from cement, coal ash mixed materials, spraying agents, water and the like.

The kneading unit 540 is, for example, a mixer that receives and kneads the coal ash discharged from the coal ash storage unit 500 and the other raw material storage unit 520 and the other raw material. The molding unit 560 is, for example, a pressure molding machine that molds the raw material after being kneaded into the kneading unit 540 into a predetermined shape such as a block shape. The curing unit 580 is a curing device that cures the coal ash formed by the molding unit 560 at a predetermined temperature and humidity for a certain period of time in order to increase the strength.

The crushing unit 600 is a crushing machine that divides and grinds the blocks cured by the curing unit 580 into large pieces. Alternatively, it may be further configured to include a classifier that further sifts and classifies after crushing.

The spraying unit 620 is, for example, a spray that sprays a spraying agent for suppressing elution of a predetermined heavy metal onto the crushed coal ash mixed material by the crushing unit 600 based on the determination result of the determining unit 101.

<Outline of processing>
Next, the processing contents of the coal ash mixed material quality control system of the present embodiment will be described. First, a series of treatments by the coal ash mixed material quality control system will be described with reference to FIG.

<Storage of coal ash>
When the treatment is started, the coal ash mixed material quality management system of the present invention first executes the treatment related to the storage of coal ash (FIG. 3 / S10).

The process is started, for example, by the operator of the coal ash mixed material quality management system recognizing the properties of the coal ash to be accepted by using the property recognition unit 30. In this treatment, the properties of coal ash are first recognized (Fig. 3 / S11).

That is, for example, an amount of a sample required for recognizing the properties is collected for each unit to be stored in the coal ash storage unit from the coal ash to be accepted. Then, for example, the properties of the coal ash are recognized by measuring the amounts of arsenic and boron contained in the coal ash with a fluorescence X-ray analyzer.

The recognition result by the property recognition unit 30 is input by the operator of the coal ash mixed material quality management system via, for example, the input unit 140. Alternatively, the property recognition unit 30 and the computer 10 are communicably connected, and the recognition result by the property recognition unit 30 is transmitted to the computer 10 via a communication cable or the like.

Next, a coal ash storage unit 500 in which the coal ash whose properties are recognized is stored (FIG. 3 / S13), and the coal ash is stored in the coal ash storage unit 500 according to the determination result (FIG. 3 / S13). FIG. 3 / S15), the properties and amount of coal ash recognized by the property recognition unit 30, and which coal ash storage unit 500 stores the properties, are stored in the coal ash storage unit 500 as property data for each unit stored in the computer 10 Is stored in the storage unit 120 (FIG. 3 / S17). The flow of determining the coal ash storage unit 500 in which the coal ash is stored will be described later.

Then, if necessary, a heavy metal elution test is performed (FIG. 3 / S19). The elution test is performed every time, for example, 5,000 cubic meters of coal ash is received.

More specifically, a sample of the amount required for the elution test was collected from the coal ash whose properties were recognized in S10, and the coal ash mixed material actually produced using the sample as a raw material was described. A predetermined heavy metal elution test is performed. This dissolution test corresponds to the first dissolution test in the present embodiment.

The predetermined metal elution test (first elution test) is, for example, measurement of the ph value of arsenic, selenium, fluorine, boron and their compounds, and the eluate by the glass electrode method, etc., based on Notification No. 18 of the Ministry of the Environment. is there.

When a predetermined metal elution test (first elution test) is performed, the result of the elution test is associated with the properties of the coal ash from which the sample was collected, for example, the input unit 140. It is input by the operator of the coal ash mixed material quality management system via the system and stored in the storage unit 120 as a part of the property data.

<Determination of coal ash storage>
Various methods can be adopted for determining the coal ash storage unit 500 (FIG. 3 / S13) in which the coal ash whose properties have been recognized are stored. For example, the determination unit 101 causes the simulation unit 105 to perform the following simulation, and determines the coal ash storage unit 500 in which the coal ash is stored based on the result of the simulation.

That is, for example, the simulation unit 105 acquires the past production record of the coal ash mixed material stored in the storage unit 120, and refers to the past production record, for example, every ton of coal ash is discharged. , Coal ash mixed materials are manufactured and shipped, etc. are recognized as emission patterns.

Then, the simulation unit 105 simulates the amount of coal ash discharged from each of the coal ash storage units 500 when the coal ash is repeatedly discharged in the future according to the discharge pattern. More specifically, for example, when the recognized emission pattern has the contents shown in FIG. 4, the simulation unit 105 can be used from each of the coal ash storage units 500 for obtaining the first amount of coal ash in the emission pattern. A plurality of candidates for a combination of coal ash emissions are determined, and the content of a predetermined heavy metal contained in the coal ash obtained when coal ash is discharged according to the determined combination candidate emissions is predetermined. Select combination candidates that are less than or equal to the upper limit of content, and select the combination that has the content closest to the upper limit of content, for example, the first amount of coal ash in the emission pattern. It is determined as a combination of coal ash emissions from each of the coal ash storage units 500 for obtaining.

FIG. 5 is an image diagram showing the contents of the determination of the combination. The height of each bar graph represents the amount of coal ash stored in each of the coal ash storage units 500. The portion marked with "1" in the upper figure of FIG. 5 is a combination of coal ash emissions for obtaining the first amount of coal ash in the emission pattern.

The simulation unit 105 repeats such a process, for example, the second, third, and so on of the emission pattern and the amount of coal ash according to the emission pattern until it becomes impossible to obtain the coal ash in the future. Simulate the amount and order of emissions. That is, when the amount of the nth coal ash according to the emission pattern is 1t and the total amount of coal ash remaining in the plurality of coal ash storage units 500 in the simulation is less than 1t, the coal based on the emission pattern The process of determining the combination of ash emissions is completed.

After that, the determination unit 101 acquires the amount of coal ash to be stored in the coal ash storage unit 500 and the content of a predetermined heavy metal contained in the coal ash, and obtains the coal ash and a plurality of the coal ash. If the amount of predetermined heavy metal contained in the coal ash obtained by mixing the coal ash storage unit 500 with the coal ash remaining in the simulation is equal to or less than the predetermined upper limit of the content, the coal remaining in the simulation Any coal ash storage unit 500 in which the amount of ash is zero is selected and determined as the coal ash storage unit 500 for storing the coal ash to be stored next.

On the other hand, the amount of a predetermined heavy metal contained in the coal ash obtained by mixing the coal ash to be stored next and the coal ash remaining in the plurality of coal ash storage units 500 in the simulation is predetermined. If the upper limit is exceeded, one of the coal ash storage units 500 in which the amount of coal ash remaining in the simulation is not zero is selected and determined as the coal ash storage unit 500 for storing the coal ash to be stored next. To do.

Alternatively, the simulation unit 105 uses the properties, amount, storage order, etc. of the coal ash stored in the plurality of coal ash storage units 500 as learning data, and the discharge amount and discharge order of coal ash from each coal ash storage unit 500. It may be configured to perform machine learning of the decision model for determining the coal ash and to simulate the future emission amount and emission order of the coal ash using the decision model made by the machine learning.

The state determined as the coal ash storage unit 500 for storing the coal ash to be stored next in this way is shown in the lower figure of FIG. In the lower figure of FIG. 5, the coal ash storage unit 500 whose coal ash storage unit ID is "FA1C" is determined as the coal ash storage unit 500 for storing the coal ash to be stored next. The contents shown in FIG. 5 may be displayed on the display which is the output unit 160.

<Manufacturing of coal ash mixed material>
After that, the coal ash mixed material quality management system executes the process of manufacturing the coal ash mixed material (FIG. 3 / S30).

When the process of producing the coal ash mixed material is started, the determination unit 101 of the computer 10 first determines the amount of coal ash emitted (FIG. 3 / S31).

The determination unit 101 first recognizes the amount of coal ash required for the production of the coal ash mixed material this time, based on, for example, an operation by the operator. Then, the determination unit 101 acquires the properties of the coal ash next discharged from the respective coal ash storage units 500 (500a, b ...) From the storage unit 120, and stores the coal ash based on the acquired properties. The amount of the coal ash discharged from the unit 500 and used as a raw material for the coal ash mixed material is determined for each of the coal ash storage units 500.

Various methods can be used to determine coal ash emissions. For example, the determination unit 101 causes the simulation unit 105 to perform the following simulation, and determines the amount of coal ash discharged for each of the coal ash storage units 500 based on the result of the simulation.

That is, for example, the simulation unit 105 refers to the storage unit 120 and recognizes the property of the coal ash next discharged from each coal ash storage unit 500 and the remaining storage amount of the coal ash having the property. Then, the simulation unit 105 determines a plurality of candidates for a combination of coal ash emissions from each of the coal ash storage units 500 for obtaining the amount of coal ash required for the production of the coal ash mixed material this time.

Then, the determination unit 101, the combination in which the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the emission amount of the candidate of the determined combination is equal to or less than the predetermined content upper limit value. Select candidates for.

That is, for example, the determination unit 101 refers to the value of the environmental standard regarding the content of arsenic and selenium (for example, the value specified in the Ministry of the Environment Notification No. 19) stored in advance in the storage unit 120, and coal ash. Candidates for the combination of emissions from each coal ash storage 500 are selected so that the contents of arsenic and selenium contained in each of the above are equal to or less than 1/2 of the environmental standard.

After that, the determination unit 101 selects, for example, the combination having the content closest to the upper limit of the content among the selected combinations, and the amount of coal ash required for the production of the coal ash mixed material this time. It is determined as a combination of coal ash emissions from each of the coal ash storage units 500 for obtaining. Then, the determination unit 101 determines the amount of the additive based on the content of a predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the discharge amount of the determined combination (FIG. 3 / S33).

Alternatively, for example, the determination unit 101 obtains the price of the coal ash and the price of the additive for suppressing the elution of a predetermined heavy metal from the coal ash mixed material from the storage unit, and the determination unit 101 obtains the price according to the emission amount of the selected combination. The amount of the additive is determined based on the content of a predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged, and the coal ash and the addition based on the discharge amount and the amount of the additive. Coal from each of the coal ash storage units 500 for obtaining the amount of coal ash required for the production of the coal ash mixed material this time by using any combination in which the total price of the agents is equal to or less than the predetermined upper limit. Determined as a combination of ash emissions.

After that, the emission control unit 107 discharges coal ash from each coal ash storage unit 500 based on the determination result of the determination unit 101, and from each of the other raw material storage units 520 according to the amount of the discharged coal ash. A plurality of other raw materials are discharged (Fig. 3 / S35).

Then, the discharged coal ash and other raw materials are kneaded by the kneading section 540 (FIG. 3 / S37), molded by the molding section 560 (FIG. 3 / S39), and cured by the curing section 580 (FIG. 3 / S41). After that, it is crushed and classified by the crushing unit 600 (FIG. 3 / S43).

Then, if necessary, the spray unit 620 sprays a spray agent for suppressing the elution of a predetermined heavy metal onto the coal ash mixed material (FIG. 3 / S45).

That is, for example, when the determination unit 101 has a predetermined heavy metal content in the coal ash obtained when the determination unit 101 discharges the coal ash according to the determined coal ash emission amount is equal to or more than a predetermined threshold value. In addition, it was decided to spray the spray agent for suppressing the elution of the predetermined heavy metal onto the coal ash mixed material produced based on the determination result of the determination unit 101, and the spray unit 620 determined the determination unit 101. Based on the determination result of, a spray agent for suppressing the elution of a predetermined heavy metal is sprayed on the coal ash mixed material.

After that, a heavy metal elution test is performed on the produced coal ash mixed material (FIG. 3 / S47). This dissolution test corresponds to the second dissolution test in the present embodiment. The heavy metal elution inspection (second elution inspection) performed at this time is, for example, an inspection based on JIS K0058-1 or Ministry of the Environment Notification No. 18. Alternatively, a content test for heavy metals and the like may be further carried out based on JIS K0058-2 or Ministry of the Environment Notification No. 19.

If the result of such an inspection meets a predetermined standard value required when the coal ash mixed material is shipped as a product (Fig. 3 / S49: Yes), the coal ash mixed material is shipped (Fig. 3 / S49: Yes). FIG. 3 / S51). On the other hand, if it does not meet the predetermined reference value, the spray agent is sprayed again (FIG. 3 / S43), and after curing in the stockyard for about one week, the treatment after S47 is performed again.

<Output image>
FIG. 6 is an example of the contents output by the coal ash mixed material quality management system to the display or the like which is the output unit 160. As shown in FIG. 6, stored coal ash information indicating the properties and amount of coal ash stored in each of the plurality of coal ash storage units 500 is output for each unit stored in the plurality of coal ash storage units 500. Will be done.

More specifically, the stored coal ash information includes a plurality of bar graphs (for example, Gr1, Gr2, Gr3) representing the properties and amounts of coal ash stored in each of the plurality of coal ash storage units 500 for each coal ash storage unit. ...), And the bar graph shows that the properties and amount of the coal ash for each unit stored in the plurality of coal ash storage units 500 are directed from the lower end of the bar graph to the upper end of the other end. The time when the coal ash is stored in the coal ash storage unit 500 is arranged and output in chronological order. When coal ash was discharged for the production of a coal ash mixed material, it became shorter from the bottom of the bar graph according to the amount discharged, and when coal ash was newly stored, it was stored. It is piled up at the top of the bar graph according to the amount.

In the present embodiment, the date and time when the coal ash was stored, the name of the electric power company and the name of the power plant, the number of the vehicles carried in, the remaining amount of storage, and the contents of arsenic and selenium (mg / kg) are displayed in the bar graph. ..

Alternatively, as shown at the bottom of FIG. 6, the stored coal ash information may be output as a list.

As described above, according to the coal ash mixed material quality control system of the present invention, even if coal ash having various properties is used as a raw material, a coal ash mixed material can be produced while suppressing the elution of heavy metals and without impairing economic efficiency. be able to.

The embodiments of the present invention have been described above, but the present invention is not limited thereto. Various modifications can be made without departing from the spirit of the present invention.

For example, the determination unit 101 is a coal ash produced by using the coal ash obtained when the determination unit 101 discharges according to the emission amount of the coal ash determined by the determination unit 120 based on the properties acquired from the storage unit 120 as a raw material. It is configured to estimate the amount of heavy metals eluted from the mixed material and determine the amount of emissions from each coal ash storage 500 so that the estimated amount of elution is equal to or less than the predetermined upper limit of elution. May be.

Alternatively, the determination unit 101 stores the properties of the coal ash next discharged from each coal ash storage section 500 and the elution amount of the predetermined heavy metal associated with the properties when the first elution test is performed. It may be configured to be obtained from the unit 120 and to determine the amount of emissions from each coal ash storage unit 500 based on the acquired properties and the amount of elution.

Alternatively, when the determination unit 101 performs a second dissolution inspection, which is a predetermined heavy metal elution inspection, on the coal ash mixed material produced by using the coal ash discharged based on the determination result of the determination unit 101 as a raw material. When the input of the elution amount of the predetermined heavy metal is accepted and the received elution amount of the predetermined heavy metal is equal to or more than a predetermined reference value, the spray agent for suppressing the elution of the predetermined heavy metal is applied. It may be configured to determine to spray the coal ash mixed material produced based on the determination result of the determination unit 101.

30 ... property recognition unit, 101 ... determination unit, 103 ... elution amount reception unit, 105 ... simulation unit, 107 ... discharge control unit, 120 ... storage unit, 160 ... output unit, 500 ... coal ash storage unit, 501 ... container unit , 503 ... Discharge section, 520 ... Other raw material storage section, 540 ... Kneading section, 620 ... Spray section.

Claims (9)

In a method of controlling the quality of a coal ash mixed material produced by mixing raw materials containing coal ash using a coal ash mixed material quality control system.
The quality management system includes a property recognition unit, a plurality of coal ash storage units for storing the coal ash, a storage unit, and a determination unit.
A step in which the property recognizing unit recognizes the properties of the coal ash including the type of a predetermined heavy metal contained in the coal ash which is the raw material of the coal ash mixed material and the content of the heavy metal.
The coal ash storage unit is one of the plurality of coal ash storage units, in which the coal ash whose properties are recognized are mixed with the coal ash having different properties, and the coal ash having different properties is not mixed. The storage process of arranging and storing in the order in which they are stored in
A step of storing the properties and amount of coal ash recognized by the property recognizing unit and which of the coal ash storage units the storage unit is stored in for each unit stored in the coal ash storage unit.
The determination unit stores the properties of the coal ash next to be discharged from each of the plurality of coal ash storage units including the coal ash storage unit that stores the coal ash having different properties in a mixed manner from the storage unit. The amount of the coal ash that is acquired and discharged from the coal ash storage unit and used as a raw material for the coal ash mixed material is determined for each of the plurality of coal ash storage units based on the acquired properties. Including the decision process,
In the determination step, the determination unit determines in advance the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the emission amount of the coal ash determined by the determination unit. A method for quality control of a coal ash mixed material, which comprises determining the emission amount so as to be equal to or less than the upper limit of the content. In the quality control method for the coal ash mixed material according to claim 1,
In the determination step, the determination unit is manufactured using coal ash as a raw material, which is obtained when the coal ash is discharged according to the emission amount of the coal ash determined by the determination unit based on the properties acquired from the storage unit. The amount of heavy metal eluted from the coal ash mixed material is estimated, and the estimated amount of elution from each of the plurality of coal ash storage portions is equal to or less than a predetermined upper limit of elution. A quality control method for coal ash mixed materials, which is characterized by determining emissions. In the quality control method for the coal ash mixed material according to claim 1 or 2.
The quality control system is provided with an elution amount receiving unit.
Prior to the determination step, the elution amount receiving unit is an elution test of the predetermined heavy metal performed on the coal ash mixed material produced by using the coal ash whose properties have been recognized as a raw material. 1 The elution test result includes a step of accepting input of test result information including the elution amount of the predetermined heavy metal and storing the elution amount in the storage unit in association with the property.
In the determination step, the determination unit acquires from the storage unit the properties of the coal ash next discharged from each of the plurality of coal ash storage units and the elution amount associated with the properties. A method for quality control of a coal ash mixed material, which comprises determining the amount of emissions from each of the plurality of coal ash storage units based on the acquired properties and the amount of elution. In the quality control method for a coal ash mixed material according to any one of claims 1 to 3.
The storage unit stores the price of the coal ash and the price of the additive for suppressing the elution of a predetermined heavy metal from the coal ash mixed material.
In the determination step, the determination unit determines the amount of the additive based on the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the emission amount. The coal ash is characterized in that the emission amount and the amount of the additive are determined so that the total price of the coal ash and the additive based on the emission amount and the amount of the additive is equal to or less than a predetermined upper limit amount. Quality control method for mixed materials. In the quality control method for a coal ash mixed material according to any one of claims 1 to 4.
The quality control system is equipped with a simulation unit.
Prior to the storage step, the simulation unit will perform future coal ash from each of the plurality of coal ash storage units based on the properties and amounts of the coal ash stored in the coal ash storage unit. Includes a simulation process that simulates the amount and order of coal emissions
The simulation unit will perform the future coal so that the content of the predetermined heavy metal contained in the coal ash obtained when the coal ash is discharged according to the simulation result of the simulation unit is equal to or less than the upper limit of the content. Simulate the amount of ash discharged and the order of discharge,
Prior to the storage step, the determination unit is then stored based on the simulation results of the simulation unit and then the properties and amount of the coal ash stored in the coal ash storage unit. A method for quality control of a coal ash mixed material, which comprises a step of selecting and determining the coal ash storage unit for storing coal ash from the plurality of coal ash storage units. In the quality control method for a coal ash mixed material according to any one of claims 1 to 5.
The quality management system includes a other raw material storage unit for storing a plurality of other raw materials which are raw materials other than the coal ash of the coal ash mixed material, an emission control unit, and a kneading unit.
The emission control unit discharges the coal ash from each of the plurality of coal ash storage units based on the determination result in the determination step, and from the other raw material storage unit according to the amount of the discharged coal ash. The process of discharging a plurality of the other raw materials and
A method for quality control of a coal ash mixed material, wherein the kneading unit includes a step of receiving and kneading the discharged coal ash and the other raw materials. In the quality control method for a coal ash mixed material according to any one of claims 1 to 6.
The quality control system includes a spray unit and
The content of the predetermined heavy metal contained in the coal ash obtained when the spray unit discharges the coal ash according to the discharge amount of the coal ash determined by the determination unit in the determination step is a predetermined threshold value. In the above case, the coal comprises a step of spraying a spray agent for suppressing elution of the predetermined heavy metal onto the coal ash mixed material produced based on the determination result of the determination unit. Quality control method for ash mixed materials. In the quality control method for a coal ash mixed material according to any one of claims 1 to 6.
The quality control system includes a spray unit and
The second elution test, which is an elution test of the predetermined heavy metal performed on the coal ash mixed material produced by the determination unit using the coal ash discharged based on the determination result in the determination step as a raw material. The step of accepting the input of the information of the inspection result including the elution amount of the predetermined heavy metal, which is the result,
When the spraying unit receives a spraying agent for suppressing the elution of the predetermined heavy metal when the elution amount of the predetermined heavy metal received by the determining unit is equal to or more than a predetermined reference value, the determination result of the determining unit determines the spraying agent. A method for quality control of a coal ash mixed material, which comprises a step of spraying the coal ash mixed material produced based on the above. In the quality control method for a coal ash mixed material according to any one of claims 1 to 8.
The quality control system includes an output unit.
A step in which the output unit outputs stored coal ash information indicating the properties and amount of the coal ash stored in each of the plurality of coal ash storage units for each unit stored in the plurality of coal ash storage units. Including
The stored coal ash information is a plurality of bar graphs representing the properties and amounts of the coal ash stored in each of the plurality of coal ash storage units for each of the coal ash storage units, and the bar graph is the plurality of coals. The properties and amounts of the coal ash stored in the ash storage unit for each unit are arranged and output in chronological order from one end to the other end of the bar graph in chronological order of storage in the coal ash storage unit. A method for quality control of coal ash mixed materials.

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