JP7159692B2 - Inventory management system and inventory management method for treatment agent used to treat fly ash - Google Patents

Description

TECHNICAL FIELD The present invention relates to an inventory management system and an inventory management method for processing agents used to treat fly ash, and more particularly, to accurately predict the inventory of processing agents to suppress out-of-stock (shortage) occurrence. The present invention relates to an inventory control system and an inventory control method for processing agents, which can reduce the complexity of management, such as placing an emergency order to a processing agent manufacturer due to an unexpected shortage.

Fly ash, which is solid matter contained in exhaust gas generated by incinerating waste, may contain heavy metals such as lead, cadmium, arsenic, selenium, and chromium. Therefore, fly ash is designated as a specially controlled general waste under the Waste Disposal Law, and is obligated to be disposed of by landfilling or the like after removal of heavy metals.

As a treatment agent for fly ash, for example, Patent Document 1 describes cements, neutralizing agents, inorganic adsorbents, chelating agents, water glass, phosphates, and harmful metal compounds such as lead (Pb). Noxious metal stabilizers are disclosed which contain one or more compounds selected from among compounds that produce poorly soluble or insoluble compounds as main constituents.

Such a fly ash treatment agent may be added in a fixed amount for each batch of fly ash treatment or for each specific amount of fly ash. Since the optimum amount of treatment agent varies, the addition of a certain amount of treatment agent may be insufficient or excessive to detoxify fly ash even when treating a specific amount of fly ash. rice field. For this reason, in recent years, from the viewpoint of appropriate treatment of fly ash and reduction of the amount of treatment agent used, a part of fly ash is sampled and analyzed before treatment, and the amount of treatment agent to be added is estimated, and that amount A method of adding a processing agent has been proposed. For example, in Patent Document 2, a part of the fly ash is collected, the heavy metal contained in the fly ash is insolubilized with a chelating agent, and then a metal compound is added to obtain an unreacted chelating agent that has not reacted with the heavy metal. A method is disclosed in which a chelated metal is produced as a reaction product of a metal compound and a metal compound, and the absorbance is measured at a wavelength at which the content of the chelated metal can be measured.

JP-A-9-99215 JP 2016-049481 A

In the treatment method described in Patent Document 2, an appropriate amount of treatment agent can be estimated for the fly ash to be treated, but on the other hand, the amount of treatment agent added for each batch or for each specific amount of fly ash Due to the need to change, regular ordering of treatments can lead to stock-outs. In particular, when the fly ash properties fluctuate greatly, or when the capacity of the treatment agent storage facility is small, if the amount of treatment agent used for fly ash treatment increases sharply, the amount of treatment agent Easily out of stock. Therefore, the inventory manager frequently checks the amount of processing agent stored in the storage tank, grasps the remaining amount, and places an order for processing agent when the remaining amount has decreased to a predetermined amount. rice field.

However, such inventory management is complicated and prone to human error. Furthermore, from the viewpoint of reducing labor costs through labor saving, there is a demand for an inventory management system that can accurately predict and automatically manage the remaining amount of processing agents.

The present invention has been made in view of the above circumstances, collects and analyzes a part of the fly ash, and processes the fly ash by varying the amount of the treatment agent added according to the analysis result. Based on the premise of , by accurately predicting the remaining amount of processing agents and automatically managing the inventory of processing agents, the complexity of management is eliminated, and inventory shortages of processing agents are suppressed. To provide an inventory control system and an inventory control method for treating agents used for treating fly ash, which can also save manpower.

The present inventors have made intensive studies to achieve the above objects. As a result, in the method of collecting and analyzing a part of the fly ash before treatment, estimating the amount of necessary treatment agent to be added, and adding that amount of treatment agent, the treatment stored in the treatment agent reservoir By providing a server that directly or indirectly collects and manages the remaining amount of the agent, it is possible to provide an inventory management system that can automatically accurately predict the remaining amount of the treatment agent. I have perfected my invention. Specifically, the present invention provides the following.

(1) A fly ash processing unit for charging and processing fly ash, a processing agent storage unit for storing processing agents for processing fly ash, and sampling and analyzing a portion of fly ash, A processing agent addition management unit that calculates the amount of processing agent to be added necessary for processing the amount of fly ash charged into the fly ash processing unit and instructs the supply of the calculated amount of processing agent to be added, and the processing agent a processing agent supply unit that supplies the amount of processing agent to be added designated by the addition management unit from the processing agent storage unit to the fly ash processing unit; and information on the remaining amount of the processing agent stored in the processing agent storage unit. and a server unit that directly or indirectly collects and manages a processing agent used for processing fly ash.

(2) The server section analyzes the collected residual amount information of the processing agent, and informs concerned parties such as an inventory manager and a processing agent supplier of the timing and amount of the processing agent to be replenished in the processing agent storage section. A processing agent inventory management system used for processing fly ash according to (1) above, having a function of notifying.

(3) The remaining processing agent information includes information from a remaining processing agent measuring device provided in the processing agent reservoir, information on the amount of processing agent added calculated by the processing agent addition management section, and the processing. The fly ash according to (1) or (2) above, which is at least one piece of information from a processing agent supply amount meter provided between the agent supply unit and the fly ash processing unit. Inventory management system for processing agents used for processing.

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

(5) A portion of the fly ash charged into the fly ash processing unit is sampled and analyzed by the processing agent addition management unit, and the amount necessary for processing the amount of fly ash charged into the fly ash processing unit a step of calculating the amount of the treatment agent to be added and instructing the supply of the calculated amount of the treatment agent to be added; and a step of directly or indirectly collecting and managing information on the remaining amount of the processing agent stored in the processing agent storage unit by the server unit. Inventory management method for 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 a part of fly ash are collected. A processing agent addition management unit that analyzes, calculates the amount of processing agent to be added necessary for processing the amount of fly ash charged into the fly ash processing unit, and instructs the supply of the calculated amount of processing agent to be added; a processing agent supply unit that supplies the amount of processing agent to be added designated by the processing agent addition management unit from the processing agent storage unit to the fly ash processing unit; Equipped with a server unit that directly or indirectly collects and manages remaining amount information, in particular, collects and analyzes a part of the fly ash, and varies the amount of treatment agent added according to the analysis results. Based on the premise that fly ash is treated by the It is possible to provide an inventory management system and an inventory management method for processing agents used for treating fly ash, which can suppress shortages and can also save labor.

1 is a schematic flow diagram of an example of construction of a processing agent inventory management system according to the present embodiment; FIG. 1 is a schematic diagram of a conventional processing agent addition system before introduction of a WEB server; FIG.

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

<Processing Agent Inventory Management System>
FIG. 1 shows a schematic flow diagram of an example of construction of a processing agent inventory management system according to the present embodiment. In FIG. 1, among the lines connecting blocks, the solid lines indicate the flow of goods, and the broken lines indicate the flow of information.
The processing agent inventory management system 1 according to the present embodiment is mainly composed of 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 information on the remaining amount of the processing agent stored in the processing agent storage unit 14, so that the remaining amount of the processing agent can be automatically and accurately calculated. By predicting this, it is possible to eliminate the complexity of inventory management and suppress out-of-stock. And such an inventory management system 1, for example, in an incineration facility that needs to process fly ash continuously for a long period of time, greatly reduces daily inventory management and enables efficient operation. In addition, processing agent manufacturers can reduce the number of emergency orders, and can efficiently manufacture and deliver processing agents. Each component will be described in detail below.

[Fly ash processing unit]
The fly ash processing unit 13 receives fly ash and processes the fly ash. As mentioned above, fly ash may contain heavy metals such as lead, cadmium, arsenic, selenium, and chromium. There is Therefore, in the fly ash treatment unit 13, the heavy metals are removed by mixing and reacting the fly ash and the treating agent.

Although the details will be described later, the processing agent is composed of, for example, a phosphate or a chelating agent. By mixing and contacting fly ash with such a treatment agent, heavy metals in the contacting fly ash can be immobilized and removed. The fly ash processing unit 13 is not particularly limited as long as it can mix and react the fly ash and the processing agent. For example, various kneaders and reaction devices can be used.

The fly ash is not particularly limited in terms of its generation source or contained components, and fly ash generated by incinerating various wastes can be used.

The treatment of fly ash may be carried out in a batch system or in a continuous system. In either case, the amount of fly ash to be treated is not particularly limited, and can be appropriately designed in consideration of the amount of fly ash generated.

[Processing agent reservoir]
The processing agent reservoir 14 stores a processing agent for treating fly ash. In the processing agent inventory 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 to be described later.

The processing agent reservoir 14 is not particularly limited as long as it can store the processing agent. For example, a storage tank or a silo can be used.

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

[Treatment Addition Management Department]
The processing agent addition management unit 16 collects and analyzes a portion of the fly ash, calculates the amount of processing agent to be added necessary for processing the amount of fly ash charged into the fly ash processing unit, and calculates the addition It instructs the supply of the amount of treatment agent.

In this way, when processing fly ash using the processing agent addition management unit 16, excessive addition is suppressed compared to the case where the amount of processing agent added is constant for each batch or for each predetermined amount. Therefore, the amount of the processing agent to be added can be effectively reduced. However, on the other hand, the amount of the treatment agent to be added varies depending on the properties of the fly ash and is not constant, which creates the need to manage the inventory of the treatment agent. Therefore, an inventory management system like this embodiment is required.

As a specific means of managing the addition of the processing agent, a part of the fly ash is sampled and analyzed, and the amount of the processing agent to be added necessary for processing the amount of fly ash charged into the fly ash processing unit 13 is calculated. It is not particularly limited as long as it has a configuration that can be used, but a part of the collected fly ash is made into a suspension, and a processing agent or a processing agent having properties similar to the processing agent is added to the suspension. Many methods for immobilizing and removing heavy metals are known.

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

[Treatment agent supply unit]
The processing agent supply unit 15 supplies the amount of processing agent to be added designated by the processing agent addition management unit 16 from the processing agent storage unit 14 to the fly ash processing unit 13 .

The processing agent supply unit 15 is not particularly limited as long as it can supply a predetermined amount of the processing agent from the processing agent storage unit 14 to the fly ash processing unit 13. Examples of the processing agent supply unit 15 include a constant feeder, a pump, and a powder feeder. can be configured with

(Processing agent)
The treatment agent has the function of fixing and removing heavy metals in the fly ash. The treatment agent is not particularly limited, and may be liquid or powder (solid), but the amount added can be calculated by sampling and analyzing a portion of the fly ash. It is necessary to have a component that is For example, chelating agents, phosphates, cement, water glass, silicates, activated carbon, neutralizers, etc. can be used. Chelating agents and phosphates are preferably used.

Chelating agents include, but are not limited to, compounds having chelate ligands for harmful metals in their structures, such as —OH, —CSSH, —SH, ═NH, —COOH, and —NH ₂ , and their Salt or the like can be used. From the viewpoint of suitably reacting with heavy metals and suitably insolubilizing heavy metals, it is preferable to use dithiocarbamic acid-based chelating agents, such as dithiocarbamate, dialkyldithiocarbamate, cycloalkyldithiocarbamate, piperazine dithiocarbamate, tetraethylene penta It is more preferable to use mindithiocarbamate and dithiocarbamate of polyamine. The chelating agents may be used singly or in combination of two or more.

The phosphate is not particularly limited, but orthophosphate, orthohydrogenphosphate, condensed phosphate, condensed hydrogenphosphate, or the like can be used. In addition, sodium salts, potassium salts, magnesium salts, calcium salts and the like can be used as these phosphates. Among them, it is preferable to use a water-soluble salt, and more preferable to use a water-soluble sodium phosphate, from the viewpoint of handling property 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 processing agent itself is liquid, it can be used as it is, or it can be used after being diluted with a solvent. In addition, even when it is in the form of powder, it can be used as it is, or it can be dispersed in a solvent to form a suspension, or dissolved in a solvent to form a solution. In the following, for the sake of convenience, the processing agent, the diluent, the suspension, and the solution of the processing agent may be referred to as "processing agent and the like."

The instruction regarding the amount of the treatment agent to be added, which is transmitted from the treatment agent addition management unit 16, is transmitted to the treatment agent supply unit 15, such as a constant feeder provided upstream of the fly ash treatment unit 13, for example, and is based on the instruction. A predetermined amount of the processing agent can be added to the fly ash processing unit 13 by operating the processing agent supply unit 15 .

[Server part]
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 . Such remaining amount information can be obtained by the parties concerned, such as an inventory manager and a processing agent supplier, through the server unit 19, so that those parties can access the processing in the processing agent storage unit 14. The remaining amount of the processing agent can be easily grasped without directly checking the agent. In addition, the server unit 19 calculates the remaining amount of the processing agent in the processing agent storage unit 14 when the fly ash charged into the fly ash processing unit 13 is processed with a constant amount of processing agent each time. However, various information (for example, numerical values) are calculated using a database in which numerical values when decreasing by a certain amount are stored in advance with the number of times fly ash is processed, and information (for example, numerical values) stored in the database. It is preferable to have an arithmetic circuit.

The remaining amount information includes, for example, information from the processing agent remaining amount measuring meter 17 provided in the processing agent storage unit 14, information on the amount of processing agent added calculated by the processing agent addition management unit 16, processing agent supply unit 15, and processing agent supply unit 15. Information from the processing agent supply meter 18 (see FIG. 1) provided between the fly ash processing unit 13 and the like can be used. In addition, when the target of treatment is fly ash contained in exhaust gas generated from an incinerator that has processed waste, in particular, the amount of fly ash generated from the planned amount of waste to be treated in the incinerator I Information on predicted production can also be used. At least one of these pieces of information may be used as the remaining amount information, and it is particularly preferable to use information on the amount of processing agent to be added calculated by the processing agent addition management unit 16 . The information on the amount of processing agent to be added calculated by the processing agent addition management unit 16 is used to calculate the consumption rate of the remaining amount of processing agent stored in the processing agent storage unit 14 even when the amount of processing agent to be added fluctuates. (proportion) can be accurately predicted, and the remaining amount of the processing agent can be estimated by malfunction of the remaining amount measuring meter 17 due to internal bridging or other problems that occur when the processing agent is powder. Information can be corrected for inaccuracies and can be measured continuously. Further, since the processing agent addition management unit 16 is neither directly contacted with the processing agent nor placed in the same system as the processing agent, acidic phosphate, aluminum sulfate, ferrous chloride, etc. are used as the processing agent. Even if a corrosive agent is used, there is no risk of replacing parts with corrosion-resistant materials, malfunctioning due to sensor deterioration, or malfunctioning due to deposits adhering to the surface. From the viewpoint of more accurately predicting the remaining amount of the processing agent in the processing agent reservoir 14, it is more preferable to use two or more types of information together as the remaining amount information.

(Information from the processing agent remaining amount measuring meter provided in the processing agent reservoir)
The processing agent reservoir 14 stores the total 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 section 14 can be predicted from information obtained by measuring the remaining processing agent stored here with the remaining amount measuring meter 17 .

The remaining amount meter 17 is not particularly limited, and a level meter, weight meter, or the like can be used. These remaining amount measuring meters 17 may be used singly or in combination of two or more.

There are many types of level meters based on their measurement principles, such as laser type, ultrasonic type, optical type, float type, pressure/differential pressure type, and voltage type. can be selected. By using this level meter, information on the powder height or the liquid height of the processing agent can be obtained directly. Therefore, if the area of the bottom of the processing agent reservoir and the density of the processing agent are known, the remaining amount can be directly calculated. The density of the processing agent or the like can be estimated from the relationship between the value of the level meter measured when the processing agent is newly delivered and the amount of delivery. In addition, it is possible to calculate the rate of decrease in the remaining amount from the relationship with the value measured by the level meter when the processing agent is newly delivered.

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

(Information on the amount of processing agent added calculated by the processing agent addition control section)
As described above, the processing agent addition management unit 16 calculates the amount of processing agent to be added necessary for processing fly ash, and instructs the supply of the processing agent in the calculated amount to be added. 16 calculates the added amount of the processing agent each time when processing the fly ash, and records and integrates the added amount instructed to the processing agent supply unit 15 in the server unit 19, so that the fly ash processing The total addition amount of the processing agents used can be determined. By subtracting the total added amount of the processing agent from the initial storage amount of the processing agent, the remaining amount can be obtained.

For example, each time the fly ash charged into the fly ash processing unit 13 is treated, a certain required addition ratio (for example, 6% (for example, 1% is 80 kg.)) Addition amount (for example, 480 kg) treatment agent , the remaining amount of the processing agent in the processing agent storage unit 14 (for example, the initial remaining amount is 15000 kg) is a fixed amount (for example, 480 kg each time) depending on the number of times fly ash is processed (for example, 8 times per day). )) is stored in the database of the server unit 19 in advance. Then, the remaining amount of the processing agent, which changes each time the fly ash is treated with a certain amount of addition stored in the database, is calculated from the initial remaining amount (for example, 15,000 kg) to the remaining amount at the ordering point (for example, 10,000 kg). ), based on the pre-order period (for example, 5 days) until reaching the It is possible to accurately predict how much the pre-order period will be shortened or extended. Specifically, _Δwv is obtained by the following equation (1), where _Δwv is the increase or decrease in the added amount of the processing agent that fluctuates with respect to the added amount when a constant amount of treatment agent is added.
Δw _v =Σ {(x _i %−x ₀ %)×n _i times}×wkg (1)
In the above formula (1), _xi is the necessary addition ratio of the treatment agent per one time calculated by analyzing the fly ash, and is a variable, which is usually set by the user U etc. is. For example, the necessary addition ratio can be changed for each specific range of analysis values such as acidity of fly ash. Further, x ₀ is the addition amount per time when the addition amount of the treatment agent is added at a certain required addition ratio (for example, see Table 1 described later), and is a constant. stored in the database of n _i is the number of occurrences of the required addition ratio x _i and is a variable. w is the addition amount per 1% of the required addition ratio, and is a constant. Also, “Σ” means the sum of {(x _i %−x ₀ %)×n _i times} when x _i is each value.

In the above example, the "order point" is set to correspond to the inventory amount of the processing agent, but is not limited to this example, and can be set to correspond to the usage amount of the processing agent, for example. In such a case, for example, an order is placed when the amount used exceeds a certain amount.

(Information from the processing agent supply meter provided between the processing agent supply unit and the fly ash processing unit)
A supply amount measuring 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 measurement meter 18 is recorded and integrated. Thus, the total addition amount of the used processing agents can be obtained. By subtracting the supply amount of the processing agent from the initial storage amount of the processing agent, the remaining amount can be obtained.

The supply amount measuring instrument 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 weight meter can be used. Moreover, when the processing agent or the like is in the form of powder, for example, a weighing scale can be used.

(Information from the operation signal of the processing agent supply unit)
Further, even if the supply amount measuring meter 18 is not provided, the total addition amount of the used treatment agent can be obtained by recording and integrating the output signals (voltage and current) associated with the operation of the treatment agent supply unit 15. . By subtracting the supply amount of the processing agent from the initial storage amount of the processing agent, the remaining amount can be obtained.

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

For example, a company that owns an incinerator or the like may have an annual plan, a monthly plan, a weekly plan, or the like regarding the operation of the incinerator. If you have such an operation plan, you can predict the future usage of the treatment agent from that plan. In particular, if there is no significant variation in the amount of processing agent added, or if there is variation in the amount of processing agent added for each batch, but there is no significant variation in the average amount used over a given period, future It is possible to accurately predict the amount of processing agent to be used and reflect it in ordering the processing agent.

The server unit 19 can have a function of determining the timing and amount of the processing agent to be replenished in 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 chronologically records the remaining amount information of the processing agent collected as described above, and based on the regularity and average value of the stock information in relation to the past passage of time, a specific future Predict the remaining amount of time. The timing and amount of processing agent to be replenished can be determined from the predicted future remaining amount in this way. The timing and amount of the processing agent to be replenished can be predicted in consideration of the amount demanded during the procurement period (the period from ordering to delivery) and the amount of safety stock. The "safety stock amount" is the stock amount for absorbing fluctuations in demand during the period from ordering to delivery. In a narrow sense, safety stock = safety factor x standard deviation of usage x (order lead time + order interval) ^1/2 . It is a concept that encompasses all the inventory that you intend to absorb.

Further, in a simple manner, when the residual amount information of the processing agent collected as described above is below the ordering point, the processing agent can be ordered. The "order point" generally means the sum of the average usage amount and the safety stock amount during the procurement period, but the "order point" in the present invention is not limited to this. It can also be set to a predetermined percentage of the volume.

The server section 19 can have a function of notifying related parties such as an inventory manager and a processing agent supplier of information regarding the timing and amount of the processing agent to be replenished in the processing agent storage portion 14 . For example, if an inventory manager receives such a notification, the inventory manager can use this notification as a trigger to place an order with a treatment agent supplier. Further, when the processing agent supplier receives such a notification, delivery led by the processing agent supplier, that is, 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 above-described processing agent inventory management system. 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 fly ash charged into the fly ash processing unit 13 is a step of calculating the amount of the processing agent to be added necessary for processing, instructing the supply of the calculated amount of the processing agent to be added; It includes a step of supplying to the fly ash processing unit 13 and a step of directly or indirectly collecting and managing information on the remaining amount of the processing agent stored in the processing agent storage unit 14 by the server unit 19 .

In the example shown in FIG. 1, the fly ash contained in the exhaust gas generated by incinerating the 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 . After that, a predetermined amount is cut out by a fixed amount feeder 12 and added to a mixing mixer 13 serving as a fly ash processing unit.

On the other hand, the processing agent stored in the processing agent storage silo 14, which is the processing agent storage unit, is also added to the mixing mixer 13 via the constant feeder 15, which is the processing agent supply unit. In addition, below, the case where a processing agent is a liquid is demonstrated.

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

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

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

A flow meter 18 is installed between the constant feeder 15 and the mixing mixer 13 to measure the amount of feed. This flow meter measures the amount of liquid discharged from the constant feeder 15 and supplied to the mixing mixer 13 (hereinafter referred to as "flow meter information").

The processing agent addition control device 16, the level meter 17, and the flow meter 18 are connected to a WEB server 19, which is a server section, in a communicable state, and the processing agent addition control device information, the level meter information, and the flow meter information are transmitted. Each of them is transmitted to the WEB server 19 .

The WEB server 19 stores (holds) the information thus collected 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 in the processing agent reservoir, and notifies the user U (incinerator operator) and related persons. The "relevant party" here means the user U, the processing agent supplier V, cooperating companies (processing agent storage warehouse operator W, shipping company D), etc. The person who should notify the time and amount of the processing agent to be replenished to the

The processing agent supplier V delivers the processing agents to the user U while sharing the delivery timing and delivery amount of the processing agents with the user U, the processing agent storage warehouse operator W, and the carrier D, respectively.

Conventionally, the user U managed the remaining amount of the processing agent stored in the processing agent storage silo 14 by monitoring it at any time via the level gauge 17 or the like. Management was complicated, and it was difficult to accurately predict in real time fluctuations in the amount used due to management of the addition of processing agents.

In contrast, by introducing the inventory management system and inventory management method of the present embodiment, the remaining amount (inventory) of the processing agent stored in the processing agent storage silo 14 can be accurately grasped in real time. At the same time, it is possible to accurately grasp the point in time when the ordering point is reached. User U and processing agent supplier V share accurate information on the remaining amount of processing agents, which can lead to problems such as urgent deliveries due to shortages of processing agents, and shutdown of incinerators due to depletion of processing agents. can be prevented from occurring.

Furthermore, by sharing information on the remaining amount of the processing agent between the user U and the cooperating processing agent storage warehouse operator W and carrier D, it is possible to arrange delivery vehicles and assign personnel for delivery ( For example, a driver, etc.) can be efficiently adjusted.

EXAMPLES 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)
A waste disposal company A is a company that incinerates waste using an incinerator. The contractor processes fly ash in hourly batches every day from 8:00 am to 4:00 pm. Specifically, at the start of each batch treatment (8:00, 9:00, 10:00 ... 15:00), a processing agent (phosphate) is added to the fly ash and kneaded for about 50 minutes. , and then change over for the next batch in about 10 minutes. That is, the processing agent is reduced only at the beginning of each batch processing (8:00, 9:00, 10:00, . . . , 15:00, 8 times in total).

The waste disposal company A had not introduced the WEB server 19 before. FIG. 2 is a schematic flow diagram of a conventional processing agent addition system before introduction of a WEB server. This processing agent addition system 100 has a configuration in which the supply amount measurement meter (flow meter) 18 and the 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 processing agent (480 kg) was added to each batch. In the past, it was normal practice to place an order once every two days.

After that, the waste disposal company A introduced the WEB server 19 . An inventory management system having the configuration shown in FIG. 1 (however, the configuration does not include only the flow meter 18) was introduced. As the remaining amount information, two of the processing agent addition control device information, the level meter information, the flow meter information, and the incinerator information, the processing agent addition control device information and the level meter information, are used. Also, as mentioned above, no flow meter information was used.

A portion of the fly ash is sampled and analyzed for P-acidity by the processing agent addition control device 16 , and a predetermined amount of fly ash is charged into the mixing mixer 13 . Then, from the analysis result of P acidity in the processing agent addition control device 16, the amount of processing agent to be added necessary for processing the fly ash is calculated, and the quantitative feeder 15 is instructed to supply the calculated amount of processing agent to be added. , metering feeder 15 adds the amount of indicated treatment agent phosphate to mixing mixer 13 . Here, Table 1 shows the relationship between the P-acidity analyzed by the processing agent addition control device 16 and the necessary addition ratio (%) of the processing agent (phosphate) to the P-acidity. The necessary addition ratio (%) of the processing agent (phosphate) in Table 1 is based on 1% (basic unit) of 80 kg of the processing agent. For example, when the necessary addition ratio of the processing agent is 6%, the amount of the processing agent added is 480 kg. The maximum storage amount of the processing agent in the processing agent storage section 14 of the waste disposal company A is 15000 kg, and the order point is 11000 kg.

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

Assuming that the fly ash was treated with a certain amount (480 kg) of treatment agent before the introduction of the WEB server 19, the amount of treatment agent added on this day was (6% x 8 times) x 80 kg = 3,840 kg. be. On the other hand, after the introduction of the WEB server 19, the amount of treatment agent added on this day was four times of fly ash treatment from 8:00 to 11:00 and four times from 12:00 to 15:00. The amount of treatment agent added varies depending on the fly ash treatment, and the actual amount of treatment agent added on this day was (5% x 4 times + 8% x 4 times) x 80 kg = 4,160 kg. . As can be seen from this, with the introduction of the WEB server 19, more processing agent was consumed than before the introduction of the WEB server 19. FIG. Then, the time when the remaining amount of the processing agent becomes small is shortened by this amount, and the period until reaching the ordering point is shortened. Here, by introducing the WEB server 19, it is possible to quickly and accurately predict fluctuations in inventory amounts based on such differences.

In addition, by calculating the order point when the change in the added amount is taken into consideration based on the order point of 11000 kg, it is possible to calculate the amount of the processing agent when adding a certain amount (in the above example, the WEB server 19 (before the introduction of )), it is also possible to predict how much the period can be shortened or extended compared to the order point. Specifically, in the above example, using the above-described formula (1), when a constant amount of the treatment agent is added, the change in the added amount Δw _v is calculated with respect to the added amount,
Δw _v ={(8%−6%)×4 times+(5%−6%)×4 times}×80 kg=320 kg, and the total amount of treatment agent added is increased by 320 kg. It can also be expected that the time to reach the ordering point will be shortened by 40 minutes {320 kg/(480 kg/h)} compared to when a constant amount of treatment agent is added.

(Example 2)
Waste disposal company B is a company that incinerates waste using an incinerator. This company starts incinerating waste at 7:00 am every day, and stops the operation of the incinerator when the incinerating of the waste to be treated for the day is completed. After that, the fly ash contained in the exhaust gas discharged from the incinerator is collected by a bag filter, and when it reaches a predetermined amount, it undergoes the batch treatment shown below as needed.

Specifically, a part of the fly ash is sampled and analyzed for P-acidity by the processing agent addition control device 16 , and a predetermined amount of fly ash is charged into the mixing mixer 13 . Then, from the analysis result of P acidity in the processing agent addition control device 16, the amount of processing agent to be added necessary for processing the fly ash is calculated, and the quantitative feeder 15 is instructed to supply the calculated amount of processing agent to be added. , metering feeder 15 adds the amount of indicated treatment agent phosphate to mixing mixer 13 . Here, the relationship between the P-acidity analyzed by the processing agent addition control device 16 and the necessary addition ratio (%) of the processing agent (phosphate) to this P-acidity is shown in Table 1 as in Example 1. and Further, the necessary addition ratio (%) of the processing agent (phosphate) in Table 1 is also based on the case where the amount of the processing agent of 80 kg is 1% (basic unit) as in Example 1. be.

The waste disposal company B had not introduced the WEB server 19 before. FIG. 2 is a schematic flow diagram of a conventional processing agent addition system before introduction of a WEB server. This processing agent addition system 100 has a configuration in which the supply amount measurement meter (flow meter) 18 and the 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 person in charge of managing the processing agent visually checked the level meter 17 at any time, and ordered the processing agent when the level system 17 reached a predetermined amount. Due to a sudden change in the amount of chemical added, we had to make an emergency order for processing chemicals from the processing chemical supplier unexpectedly, on average three times a month 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. As for remaining amount information, order management was performed using processing agent addition control device information out of processing agent addition control device information, level meter information, flow meter information, and incinerator information. Specifically, in the processing agent addition control device, the integrated value of the amount of processing agent used was calculated, and when the integrated value exceeded 11,000 kg, a warning was set to notify the user that an order was required. Level meter information was measured and shown in Table 3, but the information was not used for order management. Also, as noted above, no flow meter information was used. As a result of operating such an inventory control system, there was no urgent ordering of processing agents from 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 each day, the corresponding processing agent addition rate (see Table 1), the amount of processing agent used recorded in the processing agent inventory management system, and the display of the level meter , the remaining amount of the processing agent calculated based on the amount of the processing agent used.

1 Inventory management system for processing agent 11 Fly ash storage silo 12 Fixed feeder 13 Fly ash processing unit (or mixing mixer)
14 processing agent reservoir (or processing agent storage silo)
15 processing agent supply unit (or fixed feeder)
16 Treatment agent addition management unit (or treatment agent addition management device)
17 Remaining amount meter (or level meter)
18 supply meter (or flow meter)
19 Server part (or WEB server)
100 processing agent addition system

Claims (5)

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;
Part of the fly ash was collected , and at least P acidity out of P acidity, P alkalinity, chelating agent consumption, and heavy metal content, which are the properties of the collected fly ash, was analyzed at least multiple times a day. , From the analyzed properties of the fly ash, calculate the amount of processing agent to be added necessary for processing the amount of fly ash charged into the fly ash processing unit, and instruct the supply of the calculated amount of processing agent to be added. Processing agent addition management department,
a processing agent supply unit that supplies the amount of processing agent to be added designated by the processing agent addition management unit from the processing agent storage unit to the fly ash processing unit;
Information on the remaining amount of the processing agent stored in the processing agent storage unit is collected from the information on the amount of processing agent added calculated by the processing agent addition management unit, and the collected remaining amount information is recorded for future identification. a server unit that predicts the remaining amount at a point in time and obtains the timing and amount of the processing agent to be replenished from the predicted remaining amount at a specific point in the future;
A treatment agent inventory control system used to treat fly ash. 2. A flight system according to claim 1, wherein said server unit has a function of notifying relevant persons to be notified of the timing and amount of the processing agent to be replenished in said processing agent storage unit when carrying out inventory control of the processing agent. Inventory management system for treatment agents used to treat ash. The information on the remaining amount of the processing agent is information from a remaining amount measuring device of the processing agent provided in the processing agent reservoir, and information on the amount of the processing agent provided between the processing agent supply unit and the fly ash processing unit. 3. An inventory control system for treating agents used to treat fly ash according to claim 1 or 2, further comprising at least one information from a feed meter. The fly ash is fly ash contained in exhaust gas generated from an incinerator that treats waste,
4. The fly ash treatment according to claim 1, 2 or 3, wherein the information on the remaining amount of the processing agent further has information on the predicted amount of fly ash generated from the planned amount of waste to be treated in the incinerator. Inventory management system for processing agents used for Part of the fly ash charged into the fly ash processing unit is collected by the processing agent addition management unit, and the properties of the collected fly ash, P acidity, P alkalinity, chelating agent consumption, and heavy metal content At least P acidity is analyzed at least multiple times a day, and from the analyzed properties of the fly ash, the amount of processing agent added necessary for processing the amount of fly ash charged into the fly ash processing unit and instructing the supply of the calculated addition amount of the processing agent;
a step of supplying the processing agent in the amount instructed by the processing agent addition management unit from the processing agent storage unit to the fly ash processing unit;
The server unit collects information on the remaining amount of the processing agent stored in the processing agent storage unit from information on the amount of processing agent added calculated by the processing agent addition management unit, and records the collected residual information. , predicting the remaining amount at a specific point in the future, and determining the timing and amount of the processing agent to be replenished from the predicted future remaining amount. Method.

Images