JP6737315B2 - Inventory management system and inventory management method for treating agents used for treating exhaust gas - Google Patents

Description

The present invention relates to a processing agent inventory management system and an inventory management method used for treating exhaust gas, and more specifically, it accurately predicts the inventory of the processing agent and suppresses out-of-stock (out-of-stock) occurrence. The present invention relates to a processing agent inventory management system and an inventory management method capable of reducing the complexity of management such as the administrator making an emergency order to a processing agent manufacturer due to an unexpected shortage.

Exhaust gas generated by incinerating waste is an acidic gas containing hydrogen chloride and sulfur oxides. Conventionally, such exhaust gas is treated with an exhaust gas treating agent such as slaked lime and baking soda, and then fly ash as a solid matter is removed by a dust collector such as a bag filter and then discharged from a chimney.

By the way, the objects to be incinerated such as municipal waste and industrial waste may have greatly different properties. Therefore, the acid gas concentration of the exhaust gas generated by incineration varies greatly depending on the incineration target, and along with this, the amount of the treatment agent required to properly treat the exhaust gas tends to change significantly. In consideration of such a change in the concentration of acid gas in the exhaust gas that differs depending on the incineration target, the exhaust gas has been treated by adding an excessive amount of the treating agent to some extent.

However, if such an excessive amount of exhaust gas treating agent is added, the cost of the treating agent increases, and the remaining treating agent not used for the treatment of acid gas is collected with fly ash. Since the amount of landfill fly ash increases, and the amount of fly ash treatment agent added to fix and remove heavy metals contained in fly ash tends to increase, addition of exhaust gas treatment agent Various methods for appropriately controlling the amount have been studied.

For example, Patent Document 1 discloses a method of measuring the concentration of acid gas after collecting fly ash and feedback-controlling the addition amount of a treating agent based on the result using a specific calculation method. There is.

JP, 2013-022471, A

In the treatment method described in Patent Document 1, the acidic gas treatment can be stably performed without excessive addition of the exhaust gas treating agent. However, in the treatment method described in Patent Document 1, as described above, since it is necessary to change the amount of the treatment agent added according to the acid gas concentration of the exhaust gas after treatment, when the treatment agent is regularly ordered. , Out of stock may occur. Especially when the type of exhaust gas fluctuates greatly or when the capacity of the processing agent storage facility is small, a sudden increase in the amount of processing agent used to treat the exhaust gas tends to cause stocking of processing agents. .. 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 a predetermined amount. It was

However, such inventory management of processing agents involves complicated management and human error is likely to occur. Further, from the viewpoint of labor cost reduction due to labor saving, there is a demand for an inventory management system capable of accurately predicting and automatically managing the remaining amount of the processing agent.

The present invention has been made in view of the above circumstances, analyzes exhaust gas, and on the premise that the exhaust gas is processed by varying the addition amount of the processing agent according to the analysis result, the remaining processing agent By accurately predicting the amount and automatically managing the stock of processing agents, the complexity of management is eliminated, the stock of processing agents (out of stock) is suppressed, and labor can be saved. It is an object of the present invention to provide a stock management system and a stock management method of a treating agent used for treating a product.

The inventors of the present invention have conducted extensive studies to achieve the above object. As a result, in the method of analyzing the exhaust gas and estimating the addition amount of the required processing agent and adding the processing agent in that amount, the residual amount of the processing agent stored in the processing agent storage section can be measured directly or indirectly. The present invention has been completed by finding that it is possible to provide an inventory management system that can accurately and accurately predict the remaining amount of a processing agent by providing a server unit that collects and manages the same. Specifically, the present invention provides the following.

(1) Exhaust gas treating section for treating exhaust gas, treating agent storage section for treating agent for treating exhaust gas, analyzing exhaust gas, and treating agent necessary for treating exhaust gas in the exhaust gas treating section. The treatment agent addition management unit that calculates the addition amount and instructs the supply of the treatment agent of the calculated addition amount, and the treatment agent of the addition amount that is instructed by the treatment agent addition management unit from the treatment agent storage unit to the exhaust gas A treatment agent supply unit that supplies the treatment agent to the treatment unit, and a server unit that directly or indirectly collects and manages the remaining amount information of the treatment agent stored in the treatment agent storage unit to process the exhaust gas. Inventory management system for processing agents used for.

(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 in the processing agent storage unit by a person concerned such as an inventory manager or a processing agent supplier. The inventory management system of the treating agent used for treating the exhaust gas according to (1) above, which has the function of notifying to.

(3) The remaining amount information of the treating agent is information from a remaining amount meter of the treating agent provided in the treating agent storage unit, information of the treating agent addition amount calculated by the treating agent addition management unit, the treating agent. (1) at least one of information from a supply amount meter of a treatment agent provided between a supply unit and the exhaust gas treatment unit, and information from an operation signal of the treatment agent supply unit. ) Or (2), an inventory management system for treating agents used for treating the exhaust gas.

(4) The exhaust gas is an exhaust gas generated from an incinerator that has processed waste, and the residual amount information of the processing agent is a predicted generation amount of the exhaust gas generated from a planned amount of waste processed in the incinerator. The inventory management system of the treating agent used for treating the exhaust gas according to (3), further including the information of (3) above.

(5) The treatment agent addition management unit analyzes the exhaust gas treated in the exhaust gas treatment unit, calculates the addition amount of the treatment agent necessary for treating the exhaust gas in the exhaust gas treatment unit, and supplies the calculated treatment agent amount. The step of instructing the treatment agent, the step of supplying the treatment agent of the addition amount instructed by the treatment agent addition management unit from the treatment agent storage unit to the exhaust gas treatment unit, and the treatment agent stored in the treatment agent storage unit. And a method of collecting and managing remaining amount information of the processing agent directly or indirectly by a server unit, and a method of managing inventory of processing agents used for processing exhaust gas.

According to the present invention, an exhaust gas treating section for treating exhaust gas, a treating agent storage section for storing a treating agent for treating exhaust gas, and analyzing the exhaust gas, necessary for treating the exhaust gas in the exhaust gas treating section. The treatment agent addition management unit that calculates the addition amount of the treatment agent and instructs the supply of the calculated addition amount of the treatment agent, and the treatment agent addition unit that indicates the addition amount of the treatment agent that is instructed by the treatment agent addition management unit From the treatment agent supply unit to supply the exhaust gas treatment unit from, and the remaining amount information of the treatment agent stored in the treatment agent storage unit, a server unit for directly or indirectly collecting and managing, The exhaust gas is analyzed, and the amount of the processing agent is changed according to the analysis result. A management agent inventory management system and an inventory management method used for treating exhaust gas, which can reduce the complexity of management by controlling and suppress out-of-stock (out-of-stock) of the processing agent and also save labor. Can be provided.

It is a schematic flow diagram of a construction example of a stock management system of a treatment agent according to the present embodiment. It is a schematic diagram of the conventional processing agent addition system before introduction of a WEB server.

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

<Treatment agent inventory management system>
FIG. 1 is a schematic flow chart of an example of construction of a stock management system for treating agents according to the present embodiment. In addition, in FIG. 1, among the lines connecting the blocks, the solid lines represent the flow of objects, and the alternate long and short dash lines represent the flow of information.

The processing agent inventory management system 1 according to the present embodiment mainly includes an exhaust gas processing section 11, a processing agent storage section 12, a processing agent addition management section 13, a processing agent supply section 14, and a server section 15.

The inventory management system 1 as described above has the server unit 15 that collects and manages the remaining amount information of the processing agent stored in the processing agent storage unit 12, so that the remaining amount of the processing agent is automatically and accurately determined. It is possible to predict and eliminate the complexity of inventory management, and suppress out-of-stock. Then, such an inventory management system 1 can reduce the daily inventory management to a large extent in an incinerator that needs to treat exhaust gas continuously for a long period of time, and can operate efficiently. Also, the processing agent manufacturer can reduce the number of urgent orders and can efficiently manufacture and deliver the processing agent. Hereinafter, each component will be described in detail.

[Exhaust gas treatment section]
The exhaust gas processing unit 11 performs processing on exhaust gas. As described above, since the exhaust gas is an acidic gas containing hydrogen chloride and sulfur oxides, it is necessary to neutralize the acidic gas and suppress the emission of harmful gas to the environment before the emission to the atmosphere. Therefore, in the exhaust gas treating section 11, a treating agent is added to the exhaust gas to neutralize it.

Although details will be described later, an alkaline agent is used as the treating agent. When such a treating agent is brought into contact with the exhaust gas, the acidic gas contained in the contacted exhaust gas can be neutralized.

The exhaust gas treatment unit 11 is not particularly limited as long as it can bring the exhaust gas and the treatment agent which is a solid into contact with each other and react with each other. can do. Of these, as the flue, specifically, a part of a transfer pipe or the like for transferring the gas to a dust collector such as a bag filter at a subsequent stage may be used (hereinafter, the flue as the exhaust gas processing unit 11 will be referred to as a flue. Sometimes called a "reaction tube"). Further, the exhaust gas processing unit 11 can be configured by a closed container additionally provided in the flue (gas passage), various reaction containers, or the like.

Note that the acid gas contained in the exhaust gas does not necessarily have to be chemically neutralized in situ (exhaust gas treatment section 11), and as the treatment agent is transferred along with the exhaust gas, the latter stage (for example, the exhaust gas treatment). It may be neutralized by a flue from the part 11 to the dust collecting part 16. For example, when slaked lime is used as the treatment agent, this may occur because slaked lime reacts slowly with the acid gas.

In addition, the exhaust gas is not particularly limited in terms of its source and contained components, and exhaust gas generated by incineration of various wastes can be used.

The exhaust gas can be treated continuously. Further, it may be carried out in a batch system by using, for example, a closed container or various reaction containers for gas phase reaction. In any case, the amount of exhaust gas to be treated is not particularly limited, and can be appropriately designed in consideration of the amount of exhaust gas generated by incineration of waste.

When the exhaust gas is generated by incineration of the waste in the incinerator F, it is processed through the following route, for example. The exhaust gas generated in the incinerator F is cooled by passing through a boiler and a temperature reducing tower (neither is shown), and is transferred to the exhaust gas analysis unit 131 of the processing agent addition management unit 13 described later. After the acidic gas concentration is analyzed by the exhaust gas analysis unit 131, the exhaust gas processing unit 11 processes the gas as described above. Next, the fly ash is removed (collected) by the dust collection unit 16 (for example, a bag filter). After that, the exhaust gas analysis unit 132 analyzes, for example, the concentration of acidic gas and the like, and after confirming that it is below the exhaust gas standard, it is discharged into the atmosphere. The fly ash removed by the dust collector 16 is further fixed with heavy metals and removed to be subjected to a process such as landfill.

[Treatment agent storage part]
The treatment agent storage unit 12 stores a treatment agent for treating exhaust gas. In the processing agent inventory management system 1 according to the present embodiment, the server unit 15 described below manages the remaining amount of the processing agent stored in the processing agent storage unit 12.

The treatment agent storage unit 12 is not particularly limited as long as it can store the treatment agent, but, for example, a storage tank or a silo can be used.

The storage capacity and the shape of the treatment agent storage unit 12 are not particularly limited, and are appropriately designed in consideration of the installation space, operation plan of exhaust gas treatment, exhaust gas treatment amount, exhaust gas treatment frequency, treatment agent ordering frequency, and the like. can do.

[Treatment agent addition control department]
The treatment agent addition management unit 13 is located on at least one side of the upstream side and the downstream side of the exhaust gas processing unit 11, and in FIG. 1, both on the upstream side and the downstream side of the exhaust gas processing unit 11, respectively. The exhaust gas analysis units 131 and 132 are located, the exhaust gas analysis units 131 and 132 analyze the exhaust gas, and the exhaust gas processing units 131 and 132 calculate the addition amount of the processing agent necessary for processing the exhaust gas, and the calculated addition amount. This is to instruct the supply of the treating agent. It should be noted that the terms “upstream side” and “downstream side” here mean upstream and downstream in the flow of exhaust gas.

As described above, when the exhaust gas is treated by using the treating agent addition management unit 13, the addition amount is determined based on the analysis result by the exhaust gas analysis units 131 and 132. When treating exhaust gas in this way, the amount of treatment agent added varies depending on the nature of the exhaust gas to be treated (for example, the concentration of acid gas) and is not constant, and the inventory of treatment agent is managed. The need arises. Therefore, an inventory management system as in this embodiment is required.

As a specific means for managing the addition of the treating agent, it is sufficient that the exhaust gas is analyzed and the addition amount of the treating agent necessary for treating the amount of the exhaust gas supplied to the exhaust gas treating unit 11 can be calculated. Although not particularly limited, a method of analyzing the acidic gas concentration in the exhaust gas and calculating the amount of the treating agent necessary for neutralizing them (feed-forward control) or the acidic gas concentration in the exhaust gas after treatment Many methods (feedback control) for calculating the necessary amount of the processing agent based on the known method are known.

(Exhaust gas analysis section)
The exhaust gas analysis units 131 and 132 configure the processing agent addition management unit 13, and analyze the properties of the exhaust gas before and after the processing agent addition.

As described above, FIG. 1 shows an example having the exhaust gas analysis units 131 and 132 located on both the upstream side and the downstream side of the exhaust gas processing unit 11, but the exhaust gas analysis unit is located on the upstream side of the exhaust gas processing unit 11. It may be arranged on at least one of the downstream side and the downstream side, or may be arranged on both sides.

The gas analysis unit 131 arranged on the upstream side of the exhaust gas processing unit 11 can analyze the exhaust gas to be processed by the exhaust gas processing unit 11. The nature of the exhaust gas that is the analysis target in the gas analysis unit 131 is not particularly limited. For example, the amount of the treating agent necessary for neutralizing the exhaust gas can be calculated by measuring the acid gas concentration. It is also possible to collect a predetermined volume of exhaust gas and actually add an alkali to calculate the amount of the treating agent necessary for neutralizing the exhaust gas.

The gas analysis unit 132 arranged on the downstream side of the exhaust gas processing unit 11 can analyze the exhaust gas after being processed by the exhaust gas processing unit 11. The property of the exhaust gas to be analyzed by the gas analysis unit 132 is not particularly limited, and for example, from the relationship between the treatment agent added in the exhaust gas treatment unit 11 and the acid gas concentration after the treatment, neutralization of the exhaust gas is performed. It is possible to calculate the amount of processing agent required for the above.

Further, by comparing the analysis results obtained from the gas analysis units 131 and 132 respectively arranged on the upstream side and the downstream side of the exhaust gas treatment unit 11 with each other, the amount of the treatment agent necessary for neutralizing the exhaust gas can be more accurately determined. Can also be calculated. When the gas analysis unit 132 is arranged on the downstream side of the exhaust gas processing unit 11, the gas analysis unit 132 may be on the upstream side or the downstream side in the positional relationship with the dust collection unit 16.

Further, in order to further improve the calculation accuracy of the usage amount of the treating agent, the exhaust gas flow rate obtained by the exhaust gas flow meter 19 may be used for the purpose of obtaining the mass of the acidic gas. By integrating the exhaust gas flow rate with respect to the difference between the respective acidic gas concentrations obtained from the gas analysis units 131 and 132, the mass of the acidic gas required for the treatment can be calculated more accurately. In addition, in FIG. 1, the exhaust gas flow meter 19 is arranged at the subsequent stage of the gas analysis unit 132, but the position of the exhaust gas flow meter 19 is not limited to this example.

[Treatment agent supply section]
The treatment agent supply unit 14 supplies the addition amount of the treatment agent instructed by the treatment agent addition management unit 13 from the treatment agent storage unit 12 to the exhaust gas treatment unit 11.

The treatment agent supply unit 14 is not particularly limited as long as it can supply a predetermined amount of the treatment agent from the treatment agent storage unit 12 to the exhaust gas treatment unit 11, and is, for example, a fixed amount feeder, a pump, or a powder feeder. Can be configured.

(Processing agent)
The treating agent has a function of neutralizing the acidic gas in the exhaust gas. The treating agent is not particularly limited, and may be liquid or powder (solid), but it may have a component whose addition amount can be calculated by analyzing exhaust gas. is necessary.

When a powdery treatment agent is used, the average particle diameter thereof is preferably 1 μm or more, more preferably 2 μm or more, and further preferably 5 μm or more. When the average particle diameter of the treating agent is 1 μm or more, it is possible to prevent an increase in the differential pressure in the dust collecting section 16 in the subsequent stage and an increase in the dust concentration in the exhaust gas due to a decrease in dust collecting efficiency. The average particle size of the treatment agent is preferably 50 μm or less, more preferably 40 μm or less, and further preferably 30 μm or less. When the average particle diameter of the treating agent is 50 μm or less, it is possible to secure a large specific surface area of the treating agent that is sufficient for the exhaust gas to come into contact with the treating agent.

The treating agent is not particularly limited, and examples thereof include calcium hydroxide, calcium oxide, calcium carbonate, magnesium hydroxide, magnesium oxide, magnesium carbonate, calcium hydroxide-magnesium hydroxide, calcium oxide-magnesium oxide, carbonic acid. Calcium-magnesium carbonate, sodium hydroxide, sodium hydrogen carbonate, sodium carbonate and the like can be used. The treating agents may be used alone or in combination of two or more.

The instruction regarding the addition amount of the treatment agent transmitted from the treatment agent addition management unit 13 is transmitted to the treatment agent supply unit 14 such as a quantitative feeder provided on the upstream side of the exhaust gas treatment unit 11, and the treatment agent is processed based on the instruction. The agent supply unit 14 can be operated to add a predetermined amount of the treatment agent to the exhaust gas treatment unit 11.

[Server part]
The server unit 15 directly or indirectly collects and manages the remaining amount information of the processing agent stored in the processing agent storage unit 12. Since such remaining amount information can be acquired by the parties such as the inventory manager and the treatment agent supplier through the server unit 15, those persons can process the information in the treatment agent storage unit 12. The remaining amount of the treatment agent can be easily grasped without directly checking the treatment agent. In addition, the server unit 15 treats the exhaust gas in the exhaust gas treatment unit 11 with a fixed amount (for example, a constant flow rate, a fixed time, or one batch) of the exhaust gas with a fixed amount of the treatment agent, Using a database that pre-stores numerical values when the remaining amount of the processing agent in the processing agent storage unit decreases by a fixed amount depending on the number of times exhaust gas is processed and the processing time, and information (for example, numerical values) stored in the database Therefore, it is preferable to have an arithmetic circuit that calculates various information (for example, numerical values).

As the remaining amount information, for example, information from the remaining amount meter 17 of the treatment agent provided in the treatment agent storage unit 12, information on the treatment agent addition amount calculated by the treatment agent addition management unit 13, and the treatment agent supply unit 14 Information and the like from the treatment agent supply meter 18 (see FIG. 1) provided between the exhaust gas treatment unit 11 and the exhaust gas treatment unit 11 can be used. When the target of treatment is the exhaust gas generated from the incinerator F that has processed the waste, in particular, the information on the predicted generation amount of the exhaust gas generated from the planned treatment amount of the waste in the incinerator F is displayed. It can also be used. As the remaining amount information, at least one of these pieces of information may be used, and it is particularly preferable to use information on the amount of the processing agent added calculated by the processing agent addition management unit 13. The information on the amount of treatment agent calculated by the treatment agent addition management unit 13 is the consumption rate of the remaining amount of treatment agent stored in the treatment agent storage unit 12 even when the amount of treatment agent added varies. (Ratio) can be accurately predicted, and the remaining amount of the treatment agent is erroneous due to malfunction of the remaining amount measurement meter 17 caused by the occurrence of a problem such as internal bridging that occurs when the treatment agent is powder. The fact that the information becomes inaccurate can be corrected, and it is also an advantage that the remaining amount information can be continuously measured. Further, since the treatment agent addition management unit 13 is not brought into direct contact with the treatment agent or arranged in the same system as the treatment agent, malfunction due to deposition of deposits on the surface does not occur. In addition, from the viewpoint of more accurately predicting the remaining amount of the processing agent stored in the processing agent storage unit 12, it is more preferable to use two or more pieces of information as the remaining amount information together.

(Information from the residual amount meter of the processing agent provided in the processing agent storage section)
The treatment agent storage unit 12 stores the entire amount of the treatment agent whose remaining amount is to be measured. Therefore, the remaining amount of the processing agent in the processing agent storage unit 12 can be predicted from the information obtained by measuring the processing agent stored here by the remaining amount meter 17.

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

There are many types of level meters, such as laser type, ultrasonic type, optical type, float type, pressure/differential pressure type, voltage type, etc., depending on the measurement principle, but according to the characteristics of the treatment agent to be measured. Can be selected. By using this level meter, normally, information on the powder height or liquid height of the treating agent or the like can be directly obtained. Therefore, if the area of the bottom of the treatment agent storage unit 12 and the density of the treatment agent or the like (further consolidation when the treatment agent is powder) are known, the remaining amount can be calculated directly. The density of the treatment agent and 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 delivered amount. Further, the reduction rate of the remaining amount can be calculated from the relationship with the value measured by the level meter when the processing agent is newly delivered.

The weight scale is installed and used, for example, on the downstream side of the treatment agent storage unit 12. By using a weight scale, usually, information on the weight of the treating agent or the like can be directly obtained.

(Information on the amount of processing agent added calculated by the processing agent addition management section)
As described above, the treatment agent addition management unit 13 calculates the addition amount of the treatment agent necessary for treating the exhaust gas and instructs the supply of the calculated addition amount of the treatment agent. However, each time the exhaust gas is processed, the amount of the processing agent added is calculated, and the addition amount instructed to the processing agent supply unit 14 is recorded by the server unit 15 and integrated, so that it is used for the processing of the exhaust gas. The total amount of the treatment agent added can be determined. The remaining amount can also be obtained by subtracting the total amount of the treatment agent added from the initial storage amount of the treatment agent.

Hereinafter, a method for calculating the addition amount of the treating agent will be specifically described.

First, the mass W _acid [kg/h] of the acidic gas processed per hour is calculated by the following equation (1).
W _acid =(C _acid,in −C _acid,out )×V _g /10 ⁶ (1)
Here, C _acid,in [mg/Nm ³ ] and C _acid,out [mg/Nm ³ ] are respectively before and after the treatment with the exhaust gas treating agent (for example, the exhaust gas analysis units 131 and 132, the exhaust gas inlet and outlet). ) Is the concentration of acid gas in. Further, V _g [Nm ³ /h] is a treatment volume per hour of the exhaust gas in the standard state (0° C., 1 atm) in terms of dry gas. V _g may be a constant when the flow rate of the gas to be treated is substantially constant, and when the increase/decrease in the flow rate of the gas is large, the exhaust gas flow meter 19 in the flow path (including the inlet or the outlet) may be used. May be provided for actual measurement.

Next, the required amount of processing agent W _alkane [kg/h] is _calculated by the following equation (2).
W _alkaline =n _acid ×W _acid ×M _w,alkaline /(n _alkaline ×M _w,acid )(2)
Here, M _w,acid [g/mol] and M _w,alkaline [g/mol] are the molecular weights of the acidic compound constituting the acidic gas and the alkali constituting the treating agent, respectively, and n _acid is the acidic gas. It is the valence of the acid, and n _alkaline is the alkali valence of the alkali that constitutes the treatment agent.

Here, by substituting the expression (1) for W _acid in the expression (2), the following expression (3) is obtained.
_{W alkaline = {n acid × (} C acid, in -C acid, out) × M w, alkaline / (n alkaline × M w, acid)} × V g / 10 6 ·· (3)

For example, the treatment of the exhaust gas supplied to the exhaust gas treatment unit 11 is performed per treatment unit (for example, a unit amount or unit time, in this description, the gas flow rate V _g per hour in the above formula (3) is used). In the treatment agent storage unit 12 when the treatment agent is treated with a predetermined necessary addition unit (for example, 6 units (for example, the addition amount of the treatment agent is 80 kg per unit)) of the treatment agent (for example, 480 kg). The value when the remaining amount of the processing agent (for example, the initial remaining amount is 15000 kg) is decreased by a fixed amount (for example, 480 kg each time) per processing unit (for example, 8 times addition per day) is calculated by the server unit 15. Pre-store it in the database. Then, the remaining amount of the treating agent, which changes every time the exhaust gas is treated with a fixed addition amount stored in the database, is calculated from the initial remaining amount (for example, 15000 kg), and the remaining amount at the ordering point (for example, 10000 kg). Based on the pre-order period (e.g., 1 to 2 days) until reaching, the exhaust gas is treated with a varying amount of the treating agent, and by adding the varying amount of the treating agent, It is possible to accurately predict how much the pre-order period will be shortened or extended. Specifically, Δw _v is calculated by the following equation (4), where Δw _v (kg) is the amount of increase/decrease in the varied addition amount with respect to the addition amount when a certain amount of the treatment agent is added.
Δw _v =Σ{(x _i [g/Nm ³ ]-x ₀ [g/Nm ³ ])×n _i [h]}×V _g [Nm ³ /h]/10 ³ ...(4)
In the above formula (1), x _i is a necessary addition amount of the treating agent per 1 Nm ^{3 of} the exhaust gas, which is calculated by analyzing the exhaust gas, and is a variable, and when the above formula (3) is used, The necessary neutralization amount {(C _acid,in −C _acid,out )×M _w,alkaline /(n _alkaline ×M _w,acid )} is taken into consideration in the amount for absorbing the fluctuation of the acid concentration of the exhaust gas. Can be calculated. Further, x ₀ is an addition amount when a constant addition amount of the treating agent is added per 1 Nm ^{3 of} exhaust gas, and is a constant, which is stored in the database of the server unit 15. n _i is the appearance time of the required addition ratio x _i and is a variable. In addition, “Σ” means the sum of {(x _i [%]−x ₀ [%])×n _i [h]} when x _i has each value.

In addition, although the "order point" is set to the stock amount of the processing agent in the above-mentioned example, the "order point" is not limited to this example and may be set to, for example, the usage amount of the processing agent. In such a case, for example, when the usage amount exceeds a certain amount, the processing agent is ordered.

(Information from the treatment agent supply meter provided between the treatment agent supply unit and the exhaust gas treatment unit)
A supply amount meter 18 for measuring the supply amount of the treatment agent is provided between the treatment agent supply unit 14 and the exhaust gas treatment unit 11, and the supply amount measured by the supply amount measurement unit 18 is recorded and integrated. Then, the total amount of the treating agent used can be determined. 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 is liquid (solution, suspension, etc.), for example, a flow meter or a weight meter can be used. When the treating agent is in the form of powder, for example, a weight scale can be used.

(Information from the operation signal of the processing agent supply unit)
Further, even if the supply amount meter 18 is not provided, the total addition amount of the used processing agent can be obtained by recording and integrating the output signals (voltage, current) accompanying the operation of the processing agent supply unit 14. .. 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 predicted amount of exhaust gas generated from the planned amount of waste treated in the incinerator)
When the target of the treatment is the exhaust gas generated from the incinerator F that has processed the waste, the information on the predicted generation amount of the exhaust gas generated from the planned treatment amount of the waste in the incinerator F may be used. it can.

For example, a company having an incinerator may have an operation plan such as an annual plan, a monthly plan, and a weekly plan regarding the operation of the incinerator. If you have such an operation plan, information from the residual amount meter of the processing agent provided in the above-mentioned processing agent storage section, information on the processing agent addition amount calculated by the processing agent addition management section, processing In combination with at least one of the information from the treatment agent supply meter provided between the agent supply unit and the exhaust gas treatment unit, the future treatment agent usage amount can be predicted. In particular, if there is no significant change in the amount of the treatment agent added, or if there is a change in the amount of the treatment agent added for each batch, but there is no significant change in the average amount used in a predetermined period, It is possible to accurately predict the usage amount of the treatment agent and reflect it in the order of the treatment agent.

When combining the information on the amount of treatment agent calculated by the treatment agent addition management unit, for example, as described above, it is necessary to calculate the mass of the acidic gas contained in the exhaust gas from the exhaust gas flow rate and the concentration of the acidic gas. Accumulate the correspondence between quantity and type and quantity of waste. If there is a correlation between the type and amount of waste and the generated exhaust gas flow rate, the current exhaust gas flow rate is indirectly estimated from the type and processed amount of waste in the incinerator F, and It can be reflected in the calculation of the required amount.

The server unit 15 can have a function of determining the timing and amount of the processing agent to be replenished in the processing agent storage unit 12 based on the remaining amount information of the processing agent collected as described above.

For example, the server unit 15 records the remaining amount information of the processing agent collected as described above with time, and based on the regularity and the average value of the inventory information in relation to the past time, it is possible to identify the future specified value. Predict remaining time. In this way, 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 inventory amount" is an inventory amount for absorbing fluctuations in demand during the period from ordering to delivery. In a narrow sense, safety stock = safety factor × standard deviation of usage amount × (order lead time + order interval) ^1/2 , but in the present invention, fluctuations in demand from order to delivery It is a concept that includes all the amount of inventory intended to be absorbed.

In addition, simply, when the remaining amount information of the processing agent collected as described above is equal to or lower than the ordering point, the processing agent can be ordered. It should be noted that the "ordering point" generally means the sum of the average usage amount and the safety stock amount during the procurement period, but the "ordering point" in the present invention is not limited to this, for example, the maximum inventory. It can also be set to a predetermined ratio to the amount.

The server unit 15 can be provided with a function of notifying information such as the timing and amount of the processing agent to be replenished to the processing agent storage unit 12 to relevant persons such as an inventory manager and a processing agent supplier. For example, when the inventory manager receives such a notification, the inventory manager can place an order with the processing agent supplier with this notification as a trigger. Further, when the processing agent supplier receives such a notification, it is possible to deliver the processing agent by the supplier, that is, the so-called VMI (Vendor Managed Inventory).

(Dust collector)
Although not an essential aspect, the inventory management system for the treating agent may have a dust collecting unit 16 such as a bag filter at least on the downstream side of the exhaust gas treating unit 11. The dust collector 16 removes fly ash, which is a solid component contained in the exhaust gas. In the fly ash removed here, when a part of the treating agent added to the exhaust gas treating section 11 is not used for the (neutralization) reaction of the exhaust gas treatment and remains unreacted, Unreacted treating agent is also included.

[Supply meter]
Although not an essential aspect, the treatment agent inventory management system may have a supply amount measuring meter 18 on the downstream side of the treatment agent supply unit 14 and on the upstream side of the exhaust gas treatment unit 11. As described above, the supply amount meter 18 measures the amount of the processing agent supplied from the processing agent supply unit 14 to the exhaust gas processing unit 11. It should be noted that the terms "upstream side" and "downstream side" here mean upstream and downstream in the flow of the treatment agent.

<Processing agent inventory management method>
The processing agent inventory management method according to the present embodiment can be performed by using, for example, the processing agent inventory management system described above. Specifically, the treatment agent addition management unit 13 analyzes the exhaust gas treated in the exhaust gas treatment unit 11, calculates the addition amount of the treatment agent necessary for treating the exhaust gas in the exhaust gas treatment unit 11, and calculates the calculated addition amount. The step of instructing the supply of the treatment agent, the step of supplying the treatment agent of the addition amount instructed by the treatment agent addition management unit 13 from the treatment agent storage unit 12 to the exhaust gas treatment unit 11, and the treatment agent storage unit 12 storing the treatment agent. And a step of collecting and managing the remaining amount information of the processing agent directly or indirectly by the server unit 15.

In the example shown in FIG. 1, the exhaust gas generated by incinerating the waste in the incinerator F has its acid gas concentration measured by an acid gas concentration meter 131 installed on the downstream side of the incinerator F. It is transferred to the reaction tube 11 which is an exhaust gas treatment unit, an exhaust gas treatment agent is added, and the acidic gas contained in the exhaust gas is neutralized and removed. Next, in the exhaust gas, fly ash, which is a solid component contained in the exhaust gas, is collected and removed by the bag filter 16 which is a dust collecting part. Then, the exhaust gas is transferred to the exhaust gas analysis unit 132, where, for example, the concentration of acidic gas is measured.

On the other hand, the treatment agent stored in the treatment agent storage silo 12 that is the treatment agent storage unit is added to the reaction tube 11 via the fixed amount feeder 14 that is the treatment agent supply unit.

In such an exhaust gas treatment, the amount of the treating agent supplied from the fixed amount feeder 14 is controlled by the treating agent addition managing device 13 which is a treating agent addition managing unit. In the above-mentioned example, the information about the exhaust gas such as the acidic gas concentration obtained at the two points of the acidic gas concentration meter 131 existing on the upstream side of the exhaust gas processing unit 11 and the acidic gas concentration meter 132 existing on the downstream side is It is transmitted to the treatment agent addition management device 13 connected in a communicable state with the acidic gas concentration meters 131 and 132, the amount of the treatment agent to be added is calculated there, and the quantitative feeder 14 is instructed. The quantitative feeder 14 that has received the instruction in this way cuts out the processing agent by the addition amount based on the instruction and adds it to the reaction tube 11. Then, the treatment agent addition management device 13 records the addition amount of the treatment agent for which the quantitative feeder 14 is instructed to add (hereinafter referred to as “treatment agent addition management device information”).

When the treatment agent is used in this manner, the amount of the treatment agent stored in the treatment agent storage silo 12 decreases. A level meter 17, which is a remaining amount measuring device, is provided inside or in the vicinity of the treatment agent storage silo 12 and measures the remaining amount (hereinafter referred to as “level meter information”).

In addition, a weighing scale 18, which is a supply amount measuring instrument, is installed between the quantitative feeder 14 and the reaction tube. This weighing scale measures the weight of the processing agent discharged from the quantitative feeder 14 and supplied to the reaction tube 11 (hereinafter referred to as “weight scale information”).

The treating agent addition management device 13, the level meter 17, and the weighing scale 18 are connected to the WEB server 15, which is a server unit, so that they can communicate with each other, and the treating agent addition management device information, the level gauge information, and the weighing scale information are displayed. Each is transmitted to the WEB server 15.

The WEB server 15 stores (holds) the information thus collected, and manages the remaining amount of the processing agent in the processing agent storage silo 12. Then, the WEB server 15 calculates or predicts the timing and amount of the processing agent to be replenished in the processing agent storage unit, and notifies the user U (incinerator operator) and the related parties. Here, the “related person” means a processing agent storage unit such as a user U, a processing agent supplier V, a subcontractor (a processing agent storage warehouse agent W, a transportation agent D), etc. when performing processing agent inventory management. A person who should be notified of the timing and amount of the processing agent to be replenished with.

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

Conventionally, the user U manages the remaining amount of the processing agent stored in the processing agent storage silo 12 by monitoring the level of the processing agent at any time via the level meter 17 or the like. In addition to complicated management, it was difficult to accurately predict in real time the fluctuations in the amount used due to the management of the treatment agent addition.

On the other hand, by introducing the inventory management system and the inventory management method of the present embodiment, the remaining amount (inventory amount) of the processing agent stored in the processing agent storage silo 12 can be accurately grasped in real time. In addition to being able to do so, it is possible to accurately grasp the time when the ordering point is reached. Then, the user U and the processing agent supplier V share the accurate remaining amount information of the processing agent, so that there is a problem such as an emergency delivery due to a shortage of the processing agent, and further, an operation stop of the incinerator due to the depletion of the processing agent. It is possible to prevent the occurrence of.

Further, the user U and the collaborators, the treating agent storage warehouse company W and the transporting company D, share information regarding the remaining amount of the treating agent, thereby arranging a delivery vehicle for delivery and personnel devoted to delivery ( For example, the driver) can be adjusted 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 treatment company A is a company that incinerates waste using an incinerator. This trader treats exhaust gas from 8 am to 5 pm every day. Specifically, after cooling the exhaust gas generated by incineration, add the exhaust gas treatment agent near the flue and the dust collector, remove the fly ash and excess exhaust gas treatment agent that are solid components in the dust collector, and remove the acidic gas After being confirmed that it was released, it is discharged into the atmosphere.

The waste disposal company A had not previously installed the WEB server 15. FIG. 2 is a schematic flow diagram of a conventional processing agent addition system before the introduction of the WEB server. This processing agent addition system 100 has a configuration in which the WEB server 15 and the supply amount measuring meter (flowmeter) 18 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 15, a fixed amount of the treating agent (3.45 g/Nm ³ , 150 kg/h) was added per volume of the exhaust gas. It was a normal operation to order once every 4.17 days in the calculation.

After that, the waste disposal contractor A introduced the WEB server 15. An inventory management system having the configuration shown in FIG. 1 (however, only the flow meter 18 is not provided) was introduced. As the remaining amount information, two pieces of processing agent addition management device information and level meter information among the processing agent addition management device information, level meter information, flow meter information, and incinerator information were used. Moreover, as described above, the flowmeter information was not used.

Here, it is assumed that the flow rate of the exhaust gas discharged by the waste disposal contractor A is substantially constant, and the exhaust gas flow rate is 29,000 [Nm ³ /h] constant in the above processing, and the above equation (3) and ( The inventory management system was operated using equation (4). In addition, finely powdered baking soda was used as the treating agent.

In Table 1 below, in one day, the addition period divided by the same treatment agent addition amount, the total time of the addition period (hereinafter referred to as “addition time”), the treatment agent addition amount per 1 Nm ^{3 of} exhaust gas, The total addition amount in each addition period, the remaining amount of the treatment agent at the end of the addition period, the inlet exhaust gas HCl concentration, the outlet exhaust gas HCl concentration, and the required addition amount (theoretical amount) of the treatment agent are shown. Before the operation of the inventory management system on this day, the stock (remaining amount) of the treating agent was 16,000,000 g.

Before the introduction of the WEB server 15, an exhaust gas of 1 Nm ^{3 is} temporarily used for the theoretically required additive concentration obtained from the difference between the HCl concentration of the inlet exhaust gas and the HCl concentration of the outlet exhaust gas and the exhaust gas amount of 29,000 Nm ³ /h. If the exhaust gas is treated with a fixed amount (3.45 g/Nm ³ ) of the treatment agent, the exhaust gas is insufficient between 12:00 and 19:00 with respect to the theoretically required addition concentration. Since the HCl concentration of was higher than the target value of 50 ppm, the amount of addition was adjusted by manual control so that the treatment agent necessary for the treatment was sufficiently added for proper treatment.

On the other hand, when control is performed according to the HCl concentration of the inlet exhaust gas and the HCl concentration of the outlet exhaust gas, the concentration of the outlet exhaust gas shows a value close to the target value of 50 ppm, but the treatment agent is added to meet the appropriate required amount. The concentration also fluctuates greatly.

Before the introduction of the WEB server 15, if if were treated exhaust gas treatment agent of a fixed amount per exhaust ^{1Nm 3 (3.45g / Nm 3)} , the addition amount of the treatment agent of the day 3.45 g / Nm ^{It is 3} *9h*29,000Nm< ³ >/h=900,000g. On the other hand, after the introduction of the WEB server 15, the addition amount of the treatment agent on this day varies depending on each addition period, and the actual addition amount of the treatment agent on this day is changed. ^{is, (4.17g / Nm 3 × 1h} + 5.90g / Nm 3 × 1h + 4.66g / Nm 3 × 1h + 5.07g / Nm 3 × 1h + 4.97g / Nm 3 × 1h + 4.24g / Nm 3 × 1h + 3.69g / Nm It was ^{3 × 1h + 3.21g / Nm 3} × 1h) × 29,000Nm 3 / h = 1,133,000g. As can be seen from this, a large amount of the processing agent was consumed with the introduction of the WEB server 15 compared to before the introduction of the WEB server 15. 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 15, it is possible to promptly and accurately predict a change in the inventory quantity based on such a difference.

Further, by calculating the ordering point when the fluctuation of the added amount is added and taken into consideration based on the ordering point 6000 kg, when a certain amount of the treating agent is added (in the above example, the WEB server 15 (Before introduction of), it is possible to predict how much the period can be shortened or extended compared to the ordering point. Specifically, in the above example, using the formula (4) described above, when the increase/decrease Δw _v of the addition amount that has changed with respect to the addition amount when a fixed amount of the treatment agent is added is calculated,
^{_{Δw v = {(4.17g / Nm}} 3 -3.45g / Nm 3) × 1h + (5.90g / Nm 3 -3.45g / Nm 3) × 1h + (4.66g / Nm 3 -3.45g / ^{Nm 3) × 1h + (5.07g} / Nm 3 -3.45g / Nm 3) × 1h) + (4.97g / Nm 3 -3.45g / Nm 3) × 1h) + (4.24g / Nm 3 −3.45 g/Nm ³ )×1 h)+(3.69 g/Nm ³ −3.45 g/Nm ³ )×1 h)+(3.21 g/Nm ³ −3.45 kg/Nm ³ )×1 h)} ×29,000 Nm ³ /h}=233,000 g (233 kg), and the total amount of treatment agent increased by 233 kg per 9 hours. The amount added per hour was 100 kg/h before the introduction of the WEB server. It becomes 125.9 kg/h. Therefore, if it is assumed that the product will be delivered after consuming 10,000 kg, it will need to be delivered within 3.31 days/time. Assuming that this processing status is sustained, the inventory will be insufficient for 4 days/time delivery as before. You can predict that.

1 Treatment agent inventory management system 11 Exhaust gas treatment section (or reaction tube)
12 Treatment agent storage unit (or treatment agent storage silo)
13 Treatment agent addition control unit (or treatment agent addition control device)
131,132 Exhaust gas analysis unit (or acid gas concentration meter)
14 Processing agent supply unit (or fixed quantity feeder)
15 Server section (or WEB server)
16 Dust collector (or bag filter)
17 Fuel gauge (or level meter)
18 Supply meter (or weigh scale)
19 Exhaust gas flow meter 100 Treatment agent addition system F Incinerator

Claims (5)

An exhaust gas processing unit for processing exhaust gas with varying concentration ,
A processing agent reservoir for storing the treating agent for treating the exhaust gas,
The exhaust gas was analyzed for each processing unit of the exhaust gas to be processed by the exhaust gas treatment unit, for each processing unit of the exhaust gas to calculate the amount of treatment agent required for the waste gas treatment in the exhaust gas treatment unit, calculates A treatment agent addition management unit that instructs the supply of the treatment agent in the added amount,
A treatment agent of an addition amount instructed by the treatment agent addition management unit, for each treatment unit of the exhaust gas, a treatment agent supply unit that supplies the treatment gas from the treatment agent storage unit to the exhaust gas treatment unit,
For each processing unit of the exhaust gas, the remaining amount information of the treatment agent stored in the treatment agent storage unit is directly added by taking into consideration the increase/decrease in the addition amount of the treatment agent supplied from the treatment agent supply unit. or a server portion which indirectly managed collection, and to have the ability to predict the variation of the order before the period of the treatment agent from the remaining amount information of the treatment agent,
An inventory management system for treating agents used for treating exhaust gas, comprising: The server unit analyzes the collected remaining amount information of the processing agent and notifies the time and amount of the processing agent to be replenished to the processing agent storage unit to relevant persons such as an inventory manager and a processing agent supplier. An inventory management system of a treating agent used for treating the exhaust gas according to claim 1, which has a function. The remaining amount information of the treatment agent is information from a remaining amount meter of the treatment agent provided in the treatment agent storage unit, information of the treatment agent addition amount calculated by the treatment agent addition management unit, and the treatment agent supply unit. It is at least one information of the information from the supply amount measuring instrument of the processing agent provided between the said exhaust gas processing part, and the information from the operation signal of the said processing agent supply part, It is at least 1 or 2. An inventory management system for treating agents used for treating the exhaust gas described above. The exhaust gas is an exhaust gas generated from an incinerator that has processed waste,
The residual amount information of the treatment agent further includes information on an estimated generation amount of the exhaust gas generated from the planned treatment amount of the waste in the incinerator, which is used for treating the exhaust gas according to claim 3. Inventory management system. The treatment agent addition management unit analyzes the concentration-varying exhaust gas to be treated in the exhaust gas treatment unit for each treatment unit, and adds the treatment agent necessary for treating the exhaust gas in the exhaust gas treatment unit for each treatment unit of the exhaust gas. Calculating the amount, and instructing the supply of the calculated addition amount of the treating agent,
A step of supplying the amount of the treatment agent instructed by the treatment agent addition management unit to the exhaust gas treatment unit through the treatment agent supply unit from the treatment agent storage unit for each treatment unit of the exhaust gas,
For each processing unit of the exhaust gas, taking into account the increase/decrease in the addition amount of the processing agent supplied from the processing agent supply unit , the remaining amount information of the processing agent stored in the processing agent storage unit, A process of collecting and managing directly or indirectly by the server unit , and predicting a change in the pre-order period of the processing agent from the remaining amount information of the processing agent ,
An inventory control method of a treating agent used for treating exhaust gas, including:

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