JP2020032319A - Inventory management system and inventory management method for treatment agent to be used for treating fly ash - Google Patents

Abstract

To provide an inventory management system and the like that are for treating fly ashes, which can eliminate complications of management, suppress out-of-stock (stockout) of treatment agents and save manpower.SOLUTION: An inventory management system 1 according to the invention comprises: a fly ash treatment part 13 that charges and treats fly ashes; a treatment agent storage part 14 that stores treatment agents for treating fly ashes; a treatment agent addition management part 16 that samples and analyzes some of the fly ashes, calculates addition amounts of treatment agents required for treatment of the fly ashes charged to the fly ash treatment part 13 and instructs supply of the treatment agents corresponding to the calculated addition amounts; a treatment agent supply part 15 that supplies the treatment agents corresponding to the addition amounts instructed by the treatment agent addition management part 16, from the treatment agent storage part 14 to the fly ash treatment part 13; and a server part 19 that collects and manages directly or indirectly information about residual amounts of the treatment agents stored in the treatment agent storage part 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inventory management system and an inventory management method for a processing agent used for processing fly ash, and more specifically, to accurately predict the inventory of a processing agent and to suppress occurrence of stock-out (out of stock). In addition, the present invention relates to a processing agent inventory management system and an inventory management method that can reduce the complexity of management such as an administrator placing an urgent order to a processing agent manufacturer due to an unexpected shortage.

  Fly ash, which is a solid matter contained in exhaust gas generated by incinerating waste, may include heavy metals such as lead, cadmium, arsenic, selenium, and chromium. Therefore, fly ash is designated as specially managed municipal waste by the Waste Management Law, and is obliged to be disposed of by landfill after removing heavy metals.

  As a fly ash treating agent, for example, Patent Literature 1 discloses a cement, a neutralizing agent, an inorganic adsorbent, a chelating agent, water glass, a phosphate, and a harmful metal compound such as lead (Pb). A harmful metal stabilizer containing at least one selected from compounds which form a hardly soluble or insoluble compound as a main component is disclosed.

  Such fly ash treating agents may be added in a fixed amount for each batch of fly ash treatment or for each specific amount of fly ash. In this case, depending on the ash properties of the fly ash, the fly ash is treated. Since the optimum amount of the processing agent varies, the addition of a certain amount of the processing agent may be insufficient or excessive to detoxify the fly ash, even when processing a specific fly ash amount. Was. For this reason, in recent years, from the viewpoint of proper processing of fly ash and reduction of the amount of processing agent used, a part of the fly ash is collected and analyzed before processing, and the amount of the necessary processing agent added is estimated, and the amount is calculated. Has been proposed. For example, Patent Literature 2 discloses that a part of fly ash is collected, heavy metals contained in the fly ash are insolubilized with a chelating agent, and then a metal compound is added, so that an unreacted chelating agent that has not reacted with the heavy metal. A method is disclosed in which a chelated metal which is a reaction product of a compound and a metal compound is generated, and absorbance is measured at a wavelength at which the content of the chelated metal can be measured.

JP-A-9-99215 JP-A-2006-049481

  In the treatment method described in Patent Document 2, it is possible to estimate an appropriate amount of treatment agent for fly ash to be treated, but on the other hand, the amount of treatment agent added for each batch or for each specific fly ash amount Since it is necessary to change the order, if the order of the processing agent is periodically made, the stock may be out of stock. In particular, when the properties of the fly ash fluctuate greatly or when the capacity of the processing agent storage facility is small, if the amount of the processing agent used for processing the fly ash increases rapidly, the Out of stock is likely to occur. Therefore, the inventory manager frequently checks the amount of the processing agent stored in the storage tank, grasps the remaining amount, and places an order for the processing agent when the remaining amount has decreased to about a predetermined amount. Was.

  However, such inventory management involves complicated management, and human errors are likely to occur. Further, from the viewpoint of reducing labor costs due to labor saving, there is a need for an inventory management system capable of accurately predicting and automatically managing the remaining amount of a processing agent.

  The present invention has been made in view of the above circumstances, and a part of fly ash is collected and analyzed, and according to the analysis result, the fly ash is processed by varying the amount of a processing agent added. As a prerequisite, the remaining amount of the processing agent is accurately predicted, and the management of the processing agent inventory is automatically controlled, thereby eliminating the complexity of the management and suppressing the stockout (out of stock) of the processing agent. Another object of the present invention is to provide an inventory management system and an inventory management method for treating agents used for processing fly ash, which can save labor.

  The present inventors have intensively studied to achieve the above object. As a result, a part of the fly ash is collected and analyzed before the treatment, the necessary amount of the treatment agent is estimated, and in the method of adding that amount of the treatment agent, the treatment stored in the treatment agent storage unit is performed. By providing a server unit that directly or indirectly collects and manages the remaining amount of chemicals, it has been found that it is possible to provide an inventory management system that can automatically and accurately predict the remaining amount of processing chemicals. The invention has been completed. Specifically, the present invention provides the following.

  (1) Fly ash processing section for charging and processing fly ash, processing agent storing section for storing processing agent for processing fly ash, and collecting and analyzing a part of fly ash, A processing agent addition management unit that calculates an addition amount of a processing agent necessary for processing the amount of fly ash charged in the fly ash processing unit, and instructs supply of the calculated addition amount of the processing agent; A treatment agent supply unit that supplies the treatment amount of the treatment agent specified by the addition management unit from the treatment agent storage unit to the fly ash processing unit, and remaining amount information of the treatment agent stored in the treatment agent storage unit And a server unit that directly or indirectly collects and manages the fly ash.

(2) The server unit analyzes the collected remaining amount information of the processing agent, and determines the timing and amount of the processing agent to be replenished to the processing agent storage unit, by a related person such as an inventory manager or a processing agent supplier. An inventory management system for treating agents used for treating fly ash according to the above (1), which has a function of notifying the fly ash.

(3) The remaining amount information of the processing agent is the information from the remaining amount meter of the processing agent provided in the processing agent storage unit, the information of the processing agent addition amount calculated by the processing agent addition management unit, and the processing. The fly ash according to (1) or (2), which is at least one of information from a processing agent supply amount meter provided between the agent supply unit and the fly ash processing unit. An inventory management system for processing agents used for processing.

(4) The fly ash is fly ash contained in exhaust gas generated from an incinerator that has processed waste, and the information on the remaining amount of the processing agent is generated from a scheduled amount of waste processed in the incinerator. The inventory management system of a processing agent used for processing fly ash according to the above (3), further having information on a predicted amount of generated fly ash.

(5) A part of the fly ash charged into the fly ash processing unit is collected and analyzed by the processing agent addition management unit, and the fly ash required for processing the amount of fly ash charged into the fly ash processing unit is analyzed. Calculating the amount of the processing agent to be added, and instructing the supply of the calculated amount of the processing agent, and the processing agent of the amount specified by the processing agent addition management unit, the fly ash treatment from the processing agent storage unit. Processing the fly ash, including a step of supplying the processing agent to the processing agent, and a step of directly or indirectly collecting and managing the remaining amount information of the processing agent stored in the processing agent storage unit by the server unit. Management method of processing agents used for

  According to the present invention, a fly ash processing unit for charging and processing fly ash, a processing agent storage unit for storing a processing agent for processing fly ash, and collecting a part of the fly ash Analyze, calculate the addition amount of the processing agent necessary for processing the amount of fly ash charged in the fly ash processing unit, a processing agent addition management unit that instructs the supply of the calculated addition amount of the processing agent, A treatment agent supply unit that supplies a treatment agent of an addition amount specified by the treatment agent addition management unit from the treatment agent storage unit to the fly ash processing unit, and a treatment agent stored in the treatment agent storage unit. It has a server unit that collects and manages the remaining amount information directly or indirectly.Particularly, a part of fly ash is collected and analyzed, and the amount of the treatment agent added is changed according to the analysis result. Presuming that fly ash is processed, accurately predicting the remaining amount of the processing agent, and automatically managing the processing agent inventory. Thus, the present invention provides an inventory management system and an inventory management method of a processing agent used for processing fly ash, which can reduce the complexity of management, suppress out-of-stock (out-of-stock) of the processing agent, and save labor. Can be provided.

It is an outline flow figure of the example of construction of the processing agent stock management system concerning this embodiment. It is a schematic diagram of the conventional processing agent addition system before WEB server introduction.

  Hereinafter, specific embodiments of the present invention will be described in detail. However, the present invention is not limited to the following embodiments at all, and may be implemented with appropriate changes within the scope of the present invention. can do.

<Treatment agent inventory management system>
FIG. 1 shows a schematic flow chart of a construction example of a treatment agent inventory management system according to the present embodiment. In FIG. 1, among the lines connecting the blocks, a solid line indicates a flow of an object, and a broken line indicates a flow of information.
The processing agent inventory management system 1 according to the present embodiment mainly includes a fly ash processing unit 13, a processing agent storage unit 14, a processing agent addition management unit 16, a processing agent supply unit 15, and a server unit 19.

  Such an inventory management system 1 has a server unit 19 that collects and manages the remaining amount information of the processing agent stored in the processing agent storage unit 14, thereby automatically and accurately determining the remaining amount of the processing agent. By predicting, it is possible to eliminate the complexity of inventory management and suppress out-of-stock. And in the inventory management system 1 such as this, for example, in an incineration facility that needs to process fly ash continuously for a long period of time, daily inventory management is greatly reduced, and efficient operation becomes possible. Also, the number of urgent orders can be reduced at the processing agent manufacturer, and the manufacturing and delivery of the processing agent can be performed efficiently. Hereinafter, each component will be described in detail.

(Fly ash processing section)
The fly ash processing unit 13 is for charging fly ash and processing the fly ash. As described above, fly ash can contain heavy metals such as lead, cadmium, arsenic, selenium, and chromium. There is. Therefore, the fly ash processing unit 13 removes heavy metals by mixing and reacting the fly ash and the treating agent.

  Although the details will be described later, the treating agent is made of, for example, a phosphate or a chelating agent. Such a treatment agent can fix and remove heavy metals in the contacted fly ash by mixing and contacting it with the fly ash. The fly ash processing unit 13 is not particularly limited as long as the fly ash and the treating agent can be mixed and reacted. For example, various kneaders and reaction devices can be used.

  The fly ash is not particularly limited with respect to its generation source and contained components, and fly ash generated by incineration of various wastes can be used.

  The processing of fly ash may be performed by a batch system or a continuous system. In any case, the processing amount of fly ash is not particularly limited, and can be appropriately designed in consideration of the amount of fly ash generated.

(Treatment storage section)
The processing agent storage unit 14 stores a processing agent for processing fly ash. In the processing agent stock management system 1 according to the present embodiment, the remaining amount of the processing agent stored in the processing agent storage unit 14 is managed by the server unit 19 described later.

  The treatment agent storage section 14 is not particularly limited as long as it can store the treatment agent, and for example, a storage tank or a silo can be used.

  The storage capacity and shape of the treatment agent storage unit 14 are not particularly limited, and are appropriately designed in consideration of the installation space, operation plan of fly ash processing, fly ash processing amount, fly ash processing frequency, order frequency, and the like. can do.

(Treatment agent addition management department)
The treatment agent addition management unit 16 collects and analyzes a part of the fly ash, calculates the amount of the treatment agent required for processing the amount of fly ash charged in the fly ash processing unit, and calculates the calculated addition. This is an instruction to supply a quantity of the processing agent.

  In this way, when fly ash is treated using the treatment agent addition management unit 16, excessive addition is suppressed as compared with the case where the treatment agent addition amount is constant for each batch or for each predetermined amount. Thus, the amount of the treatment agent added can be effectively reduced. However, on the other hand, the addition amount of the treatment agent varies depending on the properties of the fly ash, and thus is not constant, and it becomes necessary to manage the stock of the treatment agent. Therefore, an inventory management system as in the present embodiment is required.

  As a specific means of controlling the addition of the processing agent, a part of the fly ash is collected and analyzed, and the amount of the processing agent added necessary for processing the amount of the fly ash charged in the fly ash processing unit 13 is calculated. It is not particularly limited as long as it has a configuration capable of forming a part of the collected fly ash as a suspension, and a treating agent or a treating agent having properties similar to the treating agent is added to the suspension. There are many known methods for immobilizing and removing heavy metals.

  Specifically, acid and alkali titration of a part of the collected fly ash suspension is used to estimate the amount of phosphoric acid required to neutralize the suspension. A method of adding a chelating agent to the ash suspension and estimating the required amount of the chelating agent from the absorbance, adding an excess of the chelating agent to a part of the collected fly ash suspension, and then removing the metal compound A method of measuring the absorbance of a chelated metal, which is a reaction product of an added and unreacted chelating agent and a metal compound, and estimating the necessary amount of the chelating agent to be added from the absorbance (see Patent Document 2). .

(Treatment agent supply section)
The treatment agent supply unit 15 supplies the treatment agent in the amount specified by the treatment agent addition management unit 16 from the treatment agent storage unit 14 to the fly ash processing unit 13.

  The treatment agent supply unit 15 is not particularly limited as long as the treatment agent supply unit 15 can supply a predetermined amount of the treatment agent from the treatment agent storage unit 14 to the fly ash processing unit 13, and is not particularly limited. Can be configured.

(Processing agent)
The treating agent has a function of fixing and removing heavy metals in fly ash. The treatment agent is not particularly limited, and may be in the form of a liquid or a powder (a solid). The amount of the fly ash can be calculated by collecting and analyzing a part of the fly ash. It is necessary to have a component that is For example, chelating agents, phosphates, cement, water glass, silicates, activated carbon, neutralizing agents and the like can be used, but from the viewpoint of easiness of the calculation method of the amount of addition, immobilization ability of heavy metals, and the like, Preferably, a chelating agent and a phosphate are used.

The chelating agent is not particularly limited, -OH, -CSSH, -SH, = NH, -COOH, -NH 2 , etc., a compound having a chelating ligand to toxic metals in the structure, and their Salts and the like can be used. From the viewpoint of suitably reacting with heavy metals and suitably insolubilizing the heavy metals, it is preferable to use a dithiocarbamic acid-based chelating agent. It is more preferable to use mindithiocarbamate and polyamine dithiocarbamate. One chelating agent may be used alone, or two or more chelating agents may be used in combination.

  Further, the phosphate is not particularly limited, but a normal phosphate, a normal hydrogen phosphate, a condensed phosphate, a condensed hydrogen phosphate, or the like can be used. In addition, as these phosphates, sodium salt, potassium salt, magnesium salt, calcium salt and the like can be used. Among them, a water-soluble salt is preferably used, and water-soluble sodium phosphate is more preferably used from the viewpoint of handling properties by adding as an aqueous solution. One type of phosphate may be used alone, or two or more types may be used in combination.

  When the treating agent itself is in a liquid state, it can be used as it is, or can be mixed with a solvent and diluted. Further, even when the powder itself is in a powder form, it can be used as it is, or can be dispersed in a solvent to form a suspension, or dissolved in a solvent to form a solution. In the following, the processing agent, the diluent, suspension, and solution of the processing agent may be referred to as “processing agent” for convenience.

  Note that the instruction regarding the amount of the processing agent added transmitted from the processing agent addition management unit 16 is transmitted to the processing agent supply unit 15 such as a quantitative feeder provided on the upstream side of the fly ash processing unit 13, and based on the instruction. By operating the processing agent supply unit 15, a predetermined amount of the processing agent can be added to the fly ash processing unit 13.

[Server]
The server unit 19 directly or indirectly collects and manages the remaining amount information of the processing agent stored in the processing agent storage unit 14. Since such a remaining amount information can be obtained by a related person such as, for example, an inventory manager or a processing agent supplier through the server unit 19, the related persons can process the processing in the processing agent storage unit 14. The remaining amount of the treatment agent can be easily grasped without directly checking the agent. In addition, the server unit 19 controls the remaining amount of the processing agent in the processing agent storage unit 14 when the processing of the fly ash charged in the fly ash processing unit 13 is performed each time with the processing agent having a constant addition amount. Calculates various information (for example, numerical values) using a database in which numerical values and the like when decreasing by a fixed amount in the number of times of fly ash processing are stored in advance, and information (for example, numerical values) stored in the database. It is preferable to have an arithmetic circuit.

  As the remaining amount information, for example, information from the remaining amount measuring meter 17 of the processing agent provided in the processing agent storage unit 14, information on the processing agent addition amount calculated by the processing agent addition management unit 16, the processing agent supply unit 15, Information from the processing agent supply amount measuring meter 18 (see FIG. 1) provided between the fly ash processing unit 13 and the like can be used. Further, when the target of treatment is fly ash contained in exhaust gas generated from an incinerator that has processed waste, in particular, the fly ash generated from the scheduled treatment amount of waste in the incinerator I is treated. Information on the predicted generation amount can also be used. As the remaining amount information, at least one of these pieces of information may be used, and in particular, it is preferable to use information on the processing agent addition amount calculated by the processing agent addition management unit 16. The information of the processing agent addition amount calculated by the processing agent addition management unit 16 indicates the consumption rate of the remaining amount of the processing agent stored in the processing agent storage unit 14 even when the addition amount of the processing agent fluctuates. (Proportion) can be accurately predicted, and the remaining amount of the processing agent is caused by a malfunction of the remaining amount meter 17 due to the occurrence of a problem such as internal bridging that occurs when the processing agent is a powder. Inaccuracies in the information can be corrected and can be measured continuously. In addition, since the treatment agent addition management unit 16 is not brought into direct contact with the treatment agent or disposed in the same system as the treatment agent, the treatment agent may be an acidic phosphate, a sulfate band, ferrous chloride, or the like. Even if a corrosive agent is used, there is no risk of replacement of components with a corrosion-resistant material, malfunction due to sensor deterioration, replacement, and the like, and malfunction due to deposits adhering to the surface does not occur. From the viewpoint of more accurately predicting the remaining amount of the processing agent in the processing agent storage unit 14, it is more preferable to use two or more pieces of information as the remaining amount information.

(Information from processing agent residual quantity meter provided in processing agent storage section)
The processing agent storage section 14 stores the entire amount of the processing agent whose remaining amount is to be measured. Therefore, the remaining amount of the processing agent in the processing agent storage unit 14 can be predicted from the information measured by the remaining amount meter 17 for the processing agent stored here.

  The remaining amount meter 17 is not particularly limited, and may be a level meter, a weighing scale, or the like. One of these fuel gauges 17 may be used alone, or two or more thereof may be used in combination.

  There are many types of level meters based on the measurement principle, such as laser type, ultrasonic type, optical type, float type, pressure / differential type, voltage type, etc., but according to the characteristics of the processing agent to be measured You can choose. By using this level meter, information on the powder height or liquid height of the processing agent or the like can be obtained directly. Therefore, if the area of the bottom of the treatment agent storage section and the density of the treatment agent and the like are known, the remaining amount can be directly calculated. Note that the density of the treatment agent or the like can be estimated from the relationship between the value of the level meter measured when the treatment agent is newly delivered and the amount of delivery. Further, the rate of decrease in the remaining amount can be calculated from the relationship with the value measured by the level meter when a new treatment agent is delivered.

  The weighing scale is installed and used, for example, on the downstream side of the treatment agent storage unit 14. By using a weighing scale, usually, information on the weight of a treatment agent or the like can be directly obtained.

(Information on the amount of processing agent added calculated by the processing agent addition management unit)
As described above, the processing agent addition management unit 16 calculates the addition amount of the processing agent required for processing fly ash and instructs the supply of the calculated addition amount of the processing agent. When the fly ash processing is performed, the amount of the processing agent added is calculated every time, and the addition amount instructed to the processing agent supply unit 15 is recorded and integrated by the server unit 19 every time the fly ash processing is performed. The total amount of the treating agent used can be determined. The remaining amount can also be obtained by subtracting the total amount of the treatment agent from the initial storage amount of the treatment agent.

For example, each time the processing of the fly ash charged in the fly ash processing unit 13 is performed, a processing agent having an addition amount (for example, 480 kg) of a predetermined required addition ratio (for example, 6% (for example, 1% is set to 80 kg)) is used. The amount of the processing agent remaining in the processing agent storage unit 14 (for example, the initial remaining amount is 15000 kg) in the processing agent storage unit 14 is a certain amount (for example, 480 kg each time) by the number of times of processing fly ash (for example, 8 times per day). )) The numerical value at the time of the decrease is stored in the database of the server unit 19 in advance. Then, the remaining amount of the processing agent, which changes every time fly ash is processed with a constant addition amount stored in the database, is calculated from the initial remaining amount (for example, 15,000 kg), and the remaining amount at the order point (for example, 10,000 kg). )), When fly ash is treated with a varying amount of processing agent based on the pre-ordering period (for example, 5 days) until the processing agent reaches the amount of processing agent added, It is possible to accurately predict how much the pre-order period will be shortened or extended. Specifically, when Δw _v is an increase / decrease of the fluctuating addition amount with respect to the addition amount when a certain amount of the processing agent is added, Δw _v is obtained by the following equation (1).
_{Δw v = Σ {(x i} % -x 0%) × n i times} × wkg ·· (1)
In the above formula (1), x _i is calculated by analyzing the fly ash, a required addition rate per one treatment agent is variable, usually, those such as the user U sets It is. For example, the required addition ratio can be varied for each specific range of analysis values such as the acidity of fly ash. Further, x ₀ is an addition amount per one time when a processing agent having an addition amount of a predetermined necessary addition ratio (for example, see Table 1 described later) is added, and is a constant. Is stored in the database. n _i is a number of occurrences of required addition rate x _i, a variable. w is the addition amount per 1% of the required addition ratio, and is a constant. Also, "Σ" means _{an x i} is the sum of _{{(x i% -x 0%} ) × n i times} when the respective values.

  In the above example, the “order point” is set to the amount of the processing agent in stock, but is not limited to this example, and may be set to, for example, the amount of the processing agent used. In such a case, for example, when the used amount exceeds a certain amount, the order is placed.

(Information from processing agent supply meter provided between processing agent supply unit and fly ash processing unit)
A supply meter 18 for measuring the supply amount of the processing agent is provided between the processing agent supply unit 15 and the fly ash processing unit 13, and the supply amount measured by the supply amount meter 18 is recorded and integrated. This makes it possible to determine the total amount of the treatment agent used. The remaining amount can also be obtained by subtracting the supply amount of the processing agent from the initial storage amount of the processing agent.

  The supply amount meter 18 is not particularly limited, but when the treatment agent or the like is liquid (solution, suspension, etc.), for example, a flow meter or a weighing machine can be used. When the processing agent or the like is in a powder form, for example, a weighing scale can be used.

(Information from operation signal of processing agent supply unit)
In addition, even if the supply amount measuring instrument 18 is not provided, the total addition amount of the used processing agent can be obtained by recording and integrating output signals (voltage and current) accompanying the operation of the processing agent supply unit 15. . The remaining amount can also be obtained by subtracting the supply amount of the processing agent from the initial storage amount of the processing agent.

(Information on the estimated amount of fly ash generated from the expected amount of waste to be treated in the incinerator)
If the target of treatment is fly ash contained in the exhaust gas generated from the incinerator that processed the waste, the estimated amount of fly ash generated from the scheduled treatment amount of the waste in the incinerator Information can also be used.

  For example, a company having an incinerator or the like may have an operation plan such as an annual plan, a monthly plan, a weekly plan, etc. regarding the operation of the incinerator. When such an operation plan is provided, it is possible to predict the future usage of the treatment agent from the plan. In particular, when there is no large change in the amount of the processing agent added, or when, for example, there is a change in the amount of the processing agent added for each batch, but there is no large change in the average usage amount for a predetermined period, the future It is possible to accurately predict the use amount of the treatment agent and reflect it in the order of the treatment agent.

  The server unit 19 can have a function of calculating the timing and amount of the processing agent to be replenished to the processing agent storage unit 14 based on the remaining amount information of the processing agent collected as described above.

For example, the server unit 19 records the remaining amount information of the processing agent collected as described above over time, and determines the future specific information based on the regularity or the average value of the stock information in relation to the past time. Predict the remaining amount at the time. Thus, the timing and amount of the processing agent to be replenished can be obtained from the predicted future remaining amount. The timing and amount of the processing agent to be replenished can be predicted in consideration of the demand amount and the safety stock amount during the procurement period (the period from ordering to delivery). The “safety stock amount” is a stock amount for absorbing fluctuations in demand during the period from ordering to delivery. In a narrow sense, safety stock = safety factor × standard deviation of used quantity × (ordering lead time + ordering interval) It is expressed by a formula of ^２. This is a concept that includes all the stock amounts that are intended to be absorbed.

  In addition, simply, when the remaining amount information of the processing agent collected as described above becomes equal to or less than the order point, it is possible to order the processing agent. The “order point” generally refers to the sum of the average used amount and the safety stock amount during the procurement period. However, the “order point” in the present invention is not limited to this. It can be set to a predetermined ratio to the amount.

  The server unit 19 can have a function of notifying the related person such as an inventory manager or a processing agent supplier of information on the timing and amount of the processing agent to be replenished to the processing agent storage unit 14. For example, when the inventory manager receives such a notification, the inventory manager can place an order with a treatment agent supplier triggered by the notification. In addition, when the treatment agent supplier receives such a notification, the delivery by the treatment agent supplier, that is, the delivery by so-called VMI (Vendor Managed Inventory) becomes possible.

<Inventory management method for treatment agents>
The processing agent inventory management method according to the present embodiment can be performed using, for example, the processing agent inventory management system described above. Specifically, a part of the fly ash charged into the fly ash processing unit 13 is sampled and analyzed by the processing agent addition management unit 16, and the amount of the fly ash charged into the fly ash processing unit 13 is analyzed. A step of calculating the addition amount of the processing agent necessary for the processing, and instructing the supply of the calculated addition amount of the processing agent, and the processing agent of the addition amount specified by the processing agent addition management unit 16 from the processing agent storage unit 14 The process includes a step of supplying the fly ash processing unit 13 and a step of directly or indirectly collecting and managing the remaining amount information of the processing agent stored in the processing agent storage unit 14 by the server unit 19.

  In the example shown in FIG. 1, fly ash contained in exhaust gas generated by incinerating waste in the incinerator F is collected by a bag filter (not shown) installed downstream of the incinerator F. Is stored in the fly ash storage silo 11. Thereafter, a predetermined amount is cut out by the fixed amount feeder 12 and added to the mixing mixer 13 which is a fly ash processing unit.

  On the other hand, the processing agent stored in the processing agent storage silo 14 that is the processing agent storage unit is also added to the mixing mixer 13 via the quantitative feeder 15 that is the processing agent supply unit. Hereinafter, a case where the treatment agent is in a liquid state will be described.

  As described above, the fly ash and the treatment agent added to the mixing mixer 13 are mixed, further kneaded with humidified water, and after heavy metals are removed, are transported to a final disposal site.

  In such fly ash processing, the amount of the processing agent supplied from the quantitative feeder 15 is controlled by a processing agent addition management device 16 which is a processing agent addition management unit. The treatment agent addition management device 16 collects a part of the fly ash from the fly ash storage silo 11 or between the fly ash storage silo 11 and the fixed-quantity feeder 12 to obtain a P acidity, a P alkalinity, and a chelating agent. Analyze fly ash properties such as consumption and heavy metal content. Then, information on the amount of the processing agent added calculated from the properties of the fly ash is transmitted to the quantitative feeder 15 communicably connected to the processing agent addition management device 16 to instruct addition. Upon receiving the instruction, the quantitative feeder 15 adds the processing agent supplied from the processing agent storage silo 14 to the mixing mixer 13 in an amount based on the instruction. Then, the treatment agent addition management device 16 records the amount of the treatment agent that has been instructed to be added to the fixed-quantity feeder 12 (hereinafter, referred to as “treatment agent addition management device information”).

  When the processing agent is used in this manner, the amount of the processing agent stored in the processing agent storage silo 14 decreases. A level meter 17, which is a remaining amount measuring meter, is provided inside or near the treating agent storage silo 14, and measures the remaining amount (hereinafter, referred to as "level meter information").

  In addition, a flow meter 18 as a supply meter is installed between the fixed amount feeder 15 and the mixing mixer 13. The flow meter measures the amount of liquid discharged from the quantitative feeder 15 and supplied to the mixing mixer 13 (hereinafter, referred to as “flow meter information”).

  The processing agent addition management device 16, the level meter 17, and the flow meter 18 are connected to each other in a communicable state with a WEB server 19, which is a server unit, and the processing agent addition management device information, the level meter information, and the flow meter information are transmitted. Each is transmitted to the web server 19.

  The WEB server 19 stores (holds) the information collected in this way, and manages the remaining amount of the processing agent in the processing agent storage silo 14. Then, the WEB server 19 calculates or predicts the timing and amount of the processing agent to be replenished to the processing agent storage unit, and notifies the user U (incinerator operating company) and related persons. Here, the “related party” refers to a processing agent storage unit such as a user U, a processing agent supplier V, a subcontractor (a processing agent storage warehouse company W, a transport company D), etc. The person who should be notified of the timing and amount of the processing agent to be replenished.

  The treating agent supplier V delivers the treating agent to the user U while sharing the delivery time and amount of the treating agent with the user U, the treating agent storage warehouse company W, and the transport company D, respectively.

  Conventionally, the user U manages the remaining amount of the processing agent stored in the processing agent storage silo 14 at any time via the level meter 17 or the like, and manages the remaining amount. In addition to complicated management, it has been difficult to accurately predict in real time a change in the amount of use due to the management of the treatment agent addition.

  In contrast, by introducing the inventory management system and the inventory management method of the present embodiment, the remaining amount (stock amount) of the processing agent stored in the processing agent storage silo 14 can be accurately grasped in real time. As well as being able to do so, the point in time when the order point is reached can be accurately grasped. Then, the user U and the processing agent supplier V share the accurate remaining amount information of the processing agent, so that the urgent delivery due to the shortage of the processing agent and the shutdown of the incinerator due to the depletion of the processing agent. Can be prevented from occurring.

  Furthermore, the user U and the cooperating agents, the processing agent storage warehousing company W and the transport company D, share information on the remaining amount of the processing agent, thereby arranging delivery vehicles for delivery and the number of personnel ( For example, adjustment of a driver or the like can be performed efficiently.

  Hereinafter, the present invention will be described more specifically with reference to Examples, but the present invention is not limited to the following Examples.

(Example 1)
The waste disposal company A is a company that incinerates waste using an incinerator. This trader performs fly ash processing every hour from 8:00 am to 4:00 pm in batches every hour. Specifically, at the start of each batch process (8:00, 9:00, 10:00 ... 15:00), a processing agent (phosphate) is added to the fly ash and kneaded for about 50 minutes. After that, the setup for the next batch is performed in about 10 minutes. That is, the amount of the treatment agent decreases only at the start of each batch process (8:00, 9:00, 10:00,... 15:00, a total of eight times).

  The waste disposal company A had not previously introduced the web server 19. FIG. 2 is a schematic flow chart of a conventional processing agent addition system before introducing a WEB server. The processing agent addition system 100 has a configuration in which a supply amount measuring meter (flow meter) 18 and a WEB server 19 are removed from the configuration of the processing agent inventory management system of the present embodiment shown in FIG. Therefore, before the introduction of the web server 19, a certain amount of the treatment agent (480 kg) was added to each batch. Conventionally, ordering once every two days was a normal operation.

  Thereafter, the waste disposal company A introduced the web server 19. An inventory management system having the configuration shown in FIG. 1 (however, a configuration not having only the flow meter 18) was introduced. In addition, as the remaining amount information, of the treatment agent addition management device information, the level meter information, the flow meter information, and the incinerator information, two of the treatment agent addition management device information and the level meter information were used. Also, as described above, the flow meter information was not used.

  A part of the fly ash is collected, the P acidity is analyzed by the treatment agent addition management device 16, and a predetermined amount of the fly ash is charged into the mixing mixer 13. Then, based on the analysis result of the P acidity in the processing agent addition management device 16, the amount of the processing agent required for the processing of fly ash is calculated, and the supply of the calculated amount of the processing agent is instructed to the quantitative feeder 15. The amount of the phosphate, which is the processing agent indicated, is added to the mixing mixer 13 by the quantitative feeder 15. Here, Table 1 shows the relationship between the P acidity analyzed by the processing agent addition management device 16 and the required addition ratio (%) of the processing agent (phosphate) to the P acidity. Note that the required addition ratio (%) of the treating agent (phosphate) in Table 1 is based on the case where the amount of the treating agent of 80 kg is 1% (basic unit). For example, when the required addition ratio of the treatment agent is 6%, the amount of the treatment agent added means 480 kg. The maximum storage amount of the processing agent in the processing agent storage unit 14 of the waste disposal company A is 15000 kg, and the order point is 11,000 kg.

  Table 2 below shows the required addition ratio and required addition amount of the treatment agent in each batch (at each time) of a certain day. On this day, fly ash derived from wastes of different traders is treated in a batch starting at 8:00 to 11:00 and a batch starting at 12:00 to 15:00.

  Assuming that fly ash was treated with a certain amount (480 kg) of the treatment agent before the introduction of the WEB server 19, the addition amount of the treatment agent on this day was (6% × 8 times) × 80 kg = 3,840 kg. is there. On the other hand, after the introduction of the WEB server 19, the addition amount of the processing agent on this day is four fly ash processings from 8:00 to 11:00 and four times from 12:00 to 15:00. The addition amount of the treatment agent fluctuated between the fly ash treatment and the actual addition amount of the treatment agent on this day was (5% × 4 times + 8% × 4 times) × 80 kg = 4,160 kg. . As can be seen from this, it can be seen that the introduction of the WEB server 19 consumes more processing agent than before the introduction of the WEB server 19. Then, the time when the remaining amount of the processing agent is reduced becomes earlier by this amount, and the period until reaching the order point becomes shorter. Here, by introducing the WEB server 19, it is possible to accurately predict a change in the stock amount based on such a difference quickly.

Further, the ordering point is calculated based on the ordering point of 11000 kg, taking into account the fluctuation of the added amount, thereby obtaining a certain amount of the processing agent (in the above example, the WEB server 19). You can also predict how much time can be shortened or extended compared to the order point. Specifically, in the above example, using Equation (1) described above, when calculating the amount of increment or decrement [Delta] w _v which varies relative to the addition amount when adding a predetermined amount of the treatment agent,
Δw _v = {(8% −6%) × 4 times + (5% −6%) × 4 times} × 80 kg = 320 kg, and the total amount of the treatment agent increased by 320 kg. Further, it can be predicted that the time to reach the order point is shortened by {320 kg / (480 kg / h)} for 40 minutes as compared with the case where a certain amount of the treatment agent is added.

(Example 2)
The waste disposal company B is a company that incinerates waste using an incinerator. This trader starts incineration of waste every day at 7:00 am, and stops operating the incinerator when the incineration of waste to be treated is completed on that day. Thereafter, fly ash contained in the exhaust gas discharged from the incinerator is collected by a bag filter, and when a predetermined amount is reached, the following batch processing is performed as needed.

  Specifically, fly ash is partially sampled and analyzed for P acidity by the treatment agent addition management device 16, and a predetermined amount of fly ash is charged into the mixing mixer 13. Then, based on the analysis result of the P acidity in the processing agent addition management device 16, the amount of the processing agent required for the processing of fly ash is calculated, and the supply of the calculated amount of the processing agent is instructed to the quantitative feeder 15. The amount of the phosphate, which is the processing agent indicated, is added to the mixing mixer 13 by the quantitative feeder 15. Here, the relationship between the P acidity analyzed by the treatment agent addition control device 16 and the required addition ratio (%) of the treatment agent (phosphate) to this P acidity is shown in Table 1 as in Example 1. And Further, the required addition ratio (%) of the treating agent (phosphate) in Table 1 is the same as in Example 1 when the amount of the treating agent of 80 kg is 1% (basic unit). is there.

  The waste disposal company B had not previously introduced the WEB server 19. FIG. 2 is a schematic flow chart of a conventional processing agent addition system before introducing a WEB server. The processing agent addition system 100 has a configuration in which a supply amount measuring meter (flow meter) 18 and a WEB server 19 are removed from the configuration of the processing agent inventory management system of the present embodiment shown in FIG. Therefore, before the introduction of the WEB server 19, the processing agent management staff checked the level meter 17 visually at any time, and ordered the processing agent when the level system 17 reached a predetermined amount. Due to the sudden change in the amount of added processing agent, unexpectedly, the processing agent supplier had to urgently place an order for the processing agent three times a month on average in the previous year.

  Therefore, the waste disposal company B introduced a web server, and introduced an inventory management system having the configuration shown in FIG. 1 (however, only having the flow meter 18). Regarding the remaining amount information, the order management was performed using the processing agent addition management device information among the processing agent addition management device information, the level meter information, the flow meter information, and the incinerator information. Specifically, the processing agent addition management device calculates an integrated value of the amount of the processing agent used, and is set so as to notify the user of an order required alarm when the integrated value exceeds 11,000 kg. The level meter information was measured and is shown in Table 3, but the information is not used for order management. Also, as described above, flow meter information was not used. As a result of operating such an inventory management system, there was no urgent order for a processing agent to a processing agent supplier for one month after the introduction of the WEB server.

  Table 2 shows the operation results of the inventory management system for a certain six days after the introduction of the web server. Specifically, the P acidity of fly ash at a predetermined time on each day, the treatment agent addition rate corresponding thereto (see Table 1), the amount of treatment agent used recorded by the treatment agent inventory management system, and the display of a level meter And the remaining amount of the processing agent calculated based on the usage amount of the processing agent.

1 Inventory Management System for Treatment Agent 11 Fly Ash Storage Silo 12 Quantitative Feeder 13 Fly Ash Processing Unit (or Mixing Mixer)
14 Treatment agent storage unit (or treatment agent storage silo)
15 Treatment agent supply unit (or quantitative feeder)
16 Treatment agent addition management unit (or treatment agent addition management device)
17 Fuel gauge (or level gauge)
18 Supply meter (or flow meter)
19 Server part (or WEB server)
100 Treatment agent addition system

Claims (5)

Fly ash processing unit for charging and processing fly ash,
A treatment agent storage unit that stores a treatment agent for treating fly ash,
A part of the fly ash is collected and analyzed, the amount of the processing agent added for the processing of the amount of the fly ash charged in the fly ash processing unit is calculated, and the supply of the calculated amount of the processing agent is calculated. A processing agent addition management unit to instruct;
A treatment agent supply unit that supplies the treatment agent of the addition amount instructed by the treatment agent addition management unit from the treatment agent storage unit to the fly ash processing unit,
A server unit that directly or indirectly collects and manages the remaining amount information of the processing agent stored in the processing agent storage unit,
An inventory management system for treating agents used to treat fly ash, comprising:   The server unit analyzes the collected remaining amount information of the processing agent, and notifies a related person such as an inventory manager or a processing agent supplier of the timing and amount of the processing agent to be replenished to the processing agent storage unit. The inventory management system of a processing agent used for processing fly ash according to claim 1 having a function.   The processing agent remaining amount information includes information from a processing agent remaining amount meter provided in the processing agent storage unit, processing agent addition amount information calculated by the processing agent addition management unit, and the processing agent supply unit. 3. The processing used for processing fly ash according to claim 1, wherein the processing is at least one of information from a processing agent supply amount measurement meter provided between the fly ash processing unit and the fly ash processing unit. 4. Agent inventory management system. The fly ash is fly ash contained in exhaust gas generated from an incinerator that has processed waste.
The process used for processing fly ash according to claim 3, wherein the remaining amount information of the processing agent further includes information on a predicted amount of fly ash generated from a scheduled amount of waste processed in the incinerator. Agent inventory management system. By the processing agent addition management unit, a part of the fly ash charged into the fly ash processing unit is collected and analyzed, and the processing agent necessary for processing the amount of fly ash charged into the fly ash processing unit is used. Calculating the addition amount of, and instructing the supply of the processing agent of the calculated addition amount,
A step of supplying a treatment agent of an addition amount instructed by the treatment agent addition management unit to the fly ash treatment unit from a treatment agent storage unit
A process of directly or indirectly collecting and managing the remaining amount information of the processing agent stored in the processing agent storage unit by the server unit, and the inventory of the processing agent used for processing fly ash. Management method.

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