JP2021137751A - Exhaust gas treatment system and exhaust gas treatment method - Google Patents

Abstract

To provide an exhaust gas treatment system that treats, with an acid gas treatment agent, acid gas included in exhaust gas generated in incineration treatment for waste, which can apply sufficient treatment to acid gas and nevertheless can further reduce influences on treatment cost and an environment caused by addition of extra acid gas treatment agents that are used in the treatment.SOLUTION: The exhaust gas treatment system according to the present invention comprises an exhaust gas treatment part, a treatment agent supply part, a post-treatment exhaust gas analysis part, and a treatment agent addition management part, which further comprises: an incinerated matter supply-amount measurement part, positioned at an upstream side of the exhaust gas treatment part, which measures supply amounts of incinerated matters; a treatment agent supply-amount measurement part that measures supply amounts of acid gas treatment agents that are supplied from the treatment agent supply part; and a server part that determines whether or not a post-treatment acid gas density is proper in terms of a relation with a management density, from an analyzed result of collected information data from the post-treatment exhaust gas analysis part, the treatment agent supply-amount measurement part and the incinerated matter supply-amount measurement part.SELECTED DRAWING: Figure 1

Description

The present invention relates to an exhaust gas treatment system and an exhaust gas treatment method, and more specifically, on the premise of an acid gas treatment system in which an acid gas contained in an exhaust gas generated in a waste incineration treatment is treated with an acid gas treatment agent. The present invention relates to an exhaust gas treatment system and an exhaust gas treatment method capable of further reducing the treatment cost and the impact on the environment due to the addition of the excess acid gas treatment agent used at that time, while sufficiently treating the gas.

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

By the way, incinerators such as municipal waste and industrial waste may have very different properties. Therefore, the acid gas concentration of the exhaust gas generated by incineration fluctuates greatly depending on the object to be incinerated, and along with this, the amount of the acid gas treatment agent added to properly treat the exhaust gas tends to change significantly. be. In anticipation of fluctuations in the concentration of acid gas in the exhaust gas, which differs for each incinerator, an excessive amount of a treatment agent is added to the exhaust gas for treatment.

However, when such an excessive amount of the acid gas treatment agent is added, the cost of the acid gas treatment agent increases, and the acid gas treatment agent that remains without being used for the treatment of the acid gas collects together with the flying ash. By being dusted, the amount of flying ash landfilled increases, and the amount of flying ash treatment agent added to fix and remove heavy metals contained in the flying ash also increases, resulting in an acid gas treatment agent. Since not only the cost of acid gas treatment but also the treatment cost of flying ash and the influence on the environment tend to increase, various methods for appropriately controlling the amount of the acid gas treatment agent added have been studied.

For example, Patent Document 1 provides feedback control that determines the amount of an alkaline agent added based on the acid gas concentration at the inlet, and supplements the amount of the alkaline agent added based on the acid gas concentration after the treatment with the alkaline agent. A method of estimating the minimum required amount of the acid gas treatment agent in combination with feedback control has been proposed.

Japanese Unexamined Patent Publication No. 10-165752

By the way, in the method of estimating the required minimum amount of the acid gas treatment agent and adding the acid gas treatment agent, as represented by the treatment method described in Patent Document 1, theoretically, the acid gas treatment agent is excessively added. Acid gas treatment can be performed stably without any problem. However, at the actual processing site, due to sudden changes in the properties of acid gas and measurement delays of measuring equipment, which is a prerequisite for control (delays caused by the sampling point of the analyzer being behind the chemical injection point), etc. In order to prevent acid gas from being insufficiently treated, the operator of the exhaust gas treatment system adds a surplus amount to the estimated minimum required amount of acid gas treatment agent based on each experience, etc., and treats acid gas. The agent is being added.

Therefore, with such a method, it is still not possible to sufficiently reduce the excess amount of the acid gas treatment agent, and while the acid gas is sufficiently treated, the surplus acid gas treatment agent used at that time is added. There was still room for improvement in order to further reduce processing costs and environmental impact.

The present invention has been made in view of the above circumstances, and is made into an acid gas on the premise of an acid gas treatment system in which the acid gas contained in the exhaust gas generated in the waste incineration treatment is treated with an acid gas treatment agent. It is an object of the present invention to provide an exhaust gas treatment system capable of further reducing the treatment cost and the impact on the environment due to the addition of the surplus acid gas treatment agent used at that time while performing sufficient treatment.

The present inventors have conducted intensive studies to achieve the above object. As a result, the exhaust gas treatment unit that treats the acid gas contained in the exhaust gas, the treatment agent supply unit that supplies the acid gas treatment agent to the exhaust gas treatment unit, and the acidity contained in the exhaust gas after the treatment by the exhaust gas treatment unit. The post-treatment acid gas concentration (C1) measured by the post-treatment acid gas analysis unit, which measures the post-treatment acid gas concentration (C1), which is the gas concentration, is always equal to or less than the predetermined control concentration (C2). An exhaust gas treatment system including a treatment agent addition control unit that calculates the amount of the acid gas treatment agent to be added and instructs the treatment agent supply unit to supply the calculated acid gas treatment agent to the exhaust gas treatment unit. In the above, the exhaust gas treatment system is further located on the upstream side of the exhaust gas treatment unit, and supplies the incinerated product supply amount measuring unit for measuring the supply amount of the incinerated product and the acid gas treatment agent supplied from the treatment agent supply unit. Information data from the treatment agent supply amount measurement unit that measures the amount, at least the post-treatment exhaust gas analysis unit, the treatment agent supply amount measurement unit, and the incinerated product supply amount measurement unit are collected and analyzed, and from the analysis results, post-treatment acid gas By providing a server unit for determining whether the gas concentration is appropriate in relation to the control concentration (C2), the amount of the acid gas treatment agent added is appropriate in relation to the control concentration (C2). By determining whether or not the acid gas is sufficiently treated, the present invention has been found that the treatment cost and the impact on the environment due to the addition of the surplus acid gas treatment agent used at that time can be further reduced. Has been completed. Specifically, the present invention provides the following.

(1) The exhaust gas treatment unit that treats the acidic gas contained in the exhaust gas, the treatment agent supply unit that supplies the acidic gas treatment agent to the exhaust gas treatment unit, and the exhaust gas after the treatment by the exhaust gas treatment unit. The post-treatment exhaust gas analysis unit that measures the post-treatment acid gas concentration (C1), which is the concentration of the acidic gas, and the post-treatment acid gas concentration (C1) that is measured by the post-treatment exhaust gas analysis unit are always predetermined control concentrations. (C2) A treatment agent addition management unit that calculates the amount of the acidic gas treatment agent to be added to be as follows and instructs the treatment agent supply unit to supply the calculated amount of the acid gas treatment agent to the exhaust gas treatment unit. The exhaust gas treatment system is located on the upstream side of the exhaust gas treatment unit, and is supplied from the incinerated product supply amount measuring unit for measuring the supply amount of the incinerated product and the treatment agent supply unit. Information data from the treatment agent supply amount measurement unit that measures the supply amount of the acidic gas treatment agent, at least the post-treatment exhaust gas analysis unit, the treatment agent supply amount measurement unit, and the incineration product supply amount measurement unit is collected and analyzed. An exhaust gas treatment system further comprising a server unit for determining whether the post-treatment acidic gas concentration is appropriate in relation to the control concentration based on the analysis results.

(2) The exhaust gas treatment system according to (1) above, wherein the server unit further has information data on the unit price of the acid gas treatment agent and the unit price of incinerator disposal.

(3) On the upstream side of the exhaust gas treatment unit, there is a pretreatment exhaust gas analysis unit that measures the amount of exhaust gas and the concentration of acid gas contained in the exhaust gas before treatment by the exhaust gas treatment unit. The exhaust gas treatment system according to (1) or (2) above, further comprising: the server unit also having information data from the pretreatment exhaust gas analysis unit.

(4) On the downstream side of the exhaust gas treatment unit, a fly ash recovery unit, a processing temperature measurement unit that measures the processing temperature at any position from the exhaust gas treatment unit to the fly ash recovery unit, and the fly ash recovery unit. The server unit further includes a fly ash analysis unit that analyzes the alkalinity of the fly ash processed in (1) and (2). ) Or (3).

(5) The treatment agent addition control unit increases the cost of excessive addition of the acid gas treatment agent based on the average deviation concentration range (C2-C1) of the acid gas concentration (C1) after the treatment from the control concentration (C2). The amount of the acid gas treatment agent added is reduced so that the average deviation concentration range (C2-C1) becomes a positive value and narrows only when the excess addition cost exceeds the threshold value. The exhaust gas treatment system according to any one of (1) to (4) above.

(6) The above-mentioned (5), wherein the treatment agent addition management unit further has a function of notifying a person in charge of the exhaust gas treatment system, a person concerned such as a treatment agent supplier, etc. of the excess addition cost in a certain period. Exhaust gas treatment system.

(7) The server unit collects information data of the acid gas concentration (C1) and the control concentration (C2) after the treatment and records them over time, and the person in charge of the exhaust gas treatment system or the treatment agent supplier. The exhaust gas treatment system according to any one of (1) to (6) above, which further has a function of notifying related parties such as.

(8) The step of treating the acid gas contained in the exhaust gas by the exhaust gas treatment unit, the step of supplying the acid gas treatment agent to the exhaust gas treatment unit by the treatment agent supply unit, and the step of supplying the acid gas treatment agent to the exhaust gas treatment unit, and the post-treatment exhaust gas analysis unit. The step of measuring the acid gas concentration (C1) after treatment, which is the concentration of acid gas contained in the exhaust gas after treatment by the exhaust gas treatment unit, and the measurement by the treatment agent addition control unit by the exhaust gas analysis unit after treatment. The amount of the acid gas treatment agent added at which the acid gas concentration (C1) after the treatment is always equal to or less than the predetermined control concentration (C2) is calculated, and the calculated amount of the acid gas treatment agent is supplied to the exhaust gas treatment unit. An exhaust gas treatment method including a step of instructing the treatment agent supply unit, wherein the exhaust gas treatment method measures the supply amount of the incinerated product by the incinerated product supply amount measurement unit located on the upstream side of the exhaust gas treatment unit. A step of measuring, a step of measuring the supply amount of the acid gas treatment agent supplied from the treatment agent supply unit by the treatment agent supply amount measurement unit, and at least the post-treatment exhaust gas analysis unit and the treatment agent by the server unit. Based on the results of collecting and analyzing information data from the supply amount measurement unit and the incinerated product supply amount measurement unit and analyzing the results, the acid gas concentration (C1) after the treatment is appropriate in relation to the control concentration (C2). An exhaust gas treatment method further comprising a step of determining the presence or absence.

(9) The excess addition cost of the acid gas treatment agent is calculated based on the average deviation concentration range (C2-C1) of the acid gas concentration (C1) after the treatment from the control concentration (C2), and the excess addition cost is calculated. The above (8) further includes a step of reducing the amount of the acid gas treatment agent added so that the average deviation concentration width (C2-C1) becomes a positive value and narrows only when the value exceeds the threshold value. The exhaust gas treatment method described in.

According to the present invention, an exhaust gas treatment unit that treats acid gas contained in gas, a treatment agent supply unit that supplies the exhaust gas treatment unit, and a concentration of acid gas contained in the exhaust gas after treatment by the exhaust gas treatment unit. The acidity that the post-treatment acid gas concentration (C1) measured by the post-treatment acid gas analysis unit and the post-treatment acid gas analysis unit that measures the post-treatment acid gas concentration (C1) is always equal to or less than the predetermined control concentration (C2). In an exhaust gas treatment system including a treatment agent addition control unit that calculates the amount of the gas treatment agent added and instructs the treatment agent supply unit to supply the calculated acid gas treatment agent to the exhaust gas treatment unit. The exhaust gas treatment system is further located on the upstream side of the exhaust gas treatment section, and measures the supply amount of the incinerated product to measure the supply amount of the incinerated product, and at least the supply amount of the acid gas treatment agent supplied from the treatment agent supply section. Information data from the treatment agent supply amount measurement unit to be measured, the treated exhaust gas analysis unit, the treatment agent supply amount measurement unit, and the incinerated product supply amount measurement unit are collected and analyzed, and from the results of the analysis, the acid gas concentration after treatment ( By providing a server unit for determining whether C1) is appropriate in relation to the control concentration (C2), the amount of the acid gas treatment agent added is appropriate in relation to the control concentration (C2). By determining whether or not the acid gas is sufficiently treated, the treatment cost and the impact on the environment due to the addition of the surplus acid gas treatment agent used at that time can be further reduced.

It is a schematic flow chart of the construction example of the exhaust gas treatment system which concerns on this embodiment.

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

<Exhaust gas treatment system>
In the exhaust gas treatment system according to the present embodiment, the exhaust gas treatment unit that treats the acidic gas contained in the exhaust gas, the treatment agent supply unit that supplies the acidic gas treatment agent to the exhaust gas treatment unit, and the exhaust gas treatment unit treat the acidic gas. The post-treatment exhaust gas analysis unit that measures the post-treatment acid gas concentration (C1), which is the concentration of the acid gas contained in the later exhaust gas, and the post-treatment acid gas concentration (C1) that is measured by the post-treatment exhaust gas analysis unit are always the same. The treatment agent addition control unit that calculates the addition amount of the acidic gas treatment agent that is equal to or less than the predetermined control concentration (C2) and instructs the treatment agent supply unit to supply the calculated addition amount of the acid gas treatment agent to the exhaust gas treatment unit. It is an exhaust gas treatment system equipped with. This exhaust gas treatment system is located on the upstream side of the exhaust gas treatment unit, and measures the supply amount of the incinerated product supply amount measuring unit for measuring the supply amount of the incinerated material and the supply amount of the acid gas treatment agent supplied from the treatment agent supply unit. Information data from the processing agent supply amount measurement unit to be measured, at least the post-treatment exhaust gas analysis unit, the treatment agent supply amount measurement unit, and the incinerated product supply amount measurement unit are collected and analyzed, and the analysis results show the acid gas concentration after treatment. (C1) is further provided with a server unit for determining whether or not it is appropriate in relation to the control concentration (C2).

Hereinafter, an example of the exhaust gas treatment system will be described in detail with reference to the drawings. FIG. 1 shows a schematic flow chart of an example of construction of an exhaust gas treatment system according to the present embodiment. In FIG. 1, among the lines connecting the blocks, the solid line represents the flow of objects and the alternate long and short dash line represents the flow of information.

Further, in the present specification, the “acid gas” refers to a gas that dissolves in a solution and exhibits acidity (particularly strong acidity), and refers to, for example, a gas such as hydrogen chloride or hydrogen sulfide.

The exhaust gas treatment system 1 is a system for treating the exhaust gas generated from the incinerator when incinerated in the incinerator F, and is treated by the exhaust gas treatment unit 12, the treatment agent supply unit 14, the post-treatment exhaust gas analysis unit 20, and the treatment. It is mainly composed of an agent addition control unit 21, and further includes an incinerator supply amount measurement unit 10, a treatment agent supply amount measurement unit 15, and a server unit 22. In addition, the exhaust gas treatment system 1 also includes a treatment agent storage unit 13, a pretreatment exhaust gas analysis unit 11, a fly ash recovery unit 16, a treatment temperature measurement unit 17, a fly ash storage unit 18, and a fly ash analysis unit. Has 19 and.

The incinerator (waste) to be incinerated in the incinerator F is incinerated inside the incinerator F after the supply amount is measured by the incinerator supply amount measuring unit 10. The exhaust gas generated in the incinerator F by such incineration is cooled by passing through a boiler and a temperature reducing tower (neither is shown), and then transferred to the pretreatment exhaust gas analysis unit 11. After the pre-treatment exhaust gas analysis unit 11 analyzes, for example, the amount of exhaust gas and the concentration of acid gas before treatment, which is the concentration of acid gas contained in the exhaust gas, the exhaust gas is transferred to the exhaust gas treatment unit 12.

On the other hand, the acid gas treatment agent used for treating the exhaust gas is stored in the treatment agent storage unit 13 and is transferred to the exhaust gas treatment unit 12 through the treatment agent supply unit 14. At this time, the amount of the treatment agent supplied is measured by the treatment agent supply amount measurement unit 15 provided on the downstream side (in the flow of the treatment agent) of the treatment agent supply unit 14.

As described above, the exhaust gas containing the acidic gas and the acidic gas treating agent for treating the acidic gas are mixed in the exhaust gas treating section 12, and the reaction between the two starts. Such a mixture is then transferred from the exhaust gas treatment unit 12 to the fly ash recovery unit 16. Although the details of the flying ash recovery unit 16 will be described later, for example, a solid component, that is, mainly flying ash and untreated from a mixture of an acid gas and an acid gas treating agent using a filter film (for example, a bag filter). Collect a mixture of acid gas treatment agents. Therefore, since the acid gas treating agent is present on the surface of such a filter film to a certain extent, the acid gas is finally treated and neutralized on the surface of the filter film of the fly ash recovery unit 16. Then, the processing temperature measuring unit 17 measures the temperature of the exhaust gas in the vicinity of the fly ash collecting unit 16 (hereinafter, may be referred to as “processing temperature”).

Then, the mixture of the fly ash and the untreated acid gas treatment agent recovered by the fly ash recovery unit 16 is temporarily stored in the fly ash storage unit 18 for the subsequent immobilization treatment of heavy metals. Then, the fly ash analysis unit 19 recovers a part of this mixture and analyzes the alkalinity and the like.

On the other hand, after the exhaust gas that has passed through the fly ash recovery unit 16 is attached to the denitration catalyst (not shown), the treated exhaust gas analysis unit 20 measures the concentration of the acid gas contained in the exhaust gas. Here, if the concentration of acid gas is sufficiently reduced, it is discharged into the atmosphere.

As described above, when treating the acid gas contained in the exhaust gas, the treatment agent addition management unit collects at least the concentration of the acid gas measured by the post-treatment exhaust gas analysis unit 20, and is acidic based on the value. The addition amount of the acid gas treatment agent is calculated so that the addition amount of the gas treatment agent is always equal to or less than the predetermined control concentration (C2), and the supply of the calculated addition amount of the acid gas treatment agent to the exhaust gas treatment unit 12 is processed. Instruct the agent supply unit 14 to perform feedback control.

Further, when the server unit 22 processes such an acid gas, at least the information data of the post-treatment acid gas concentration (C1) of the post-treatment exhaust gas analysis unit 20 and the acid gas treatment agent of the treatment agent supply amount measurement unit 15 The acid gas concentration (C1) after treatment is determined to be the control concentration (C2) from the results of collecting and analyzing the information data of the supply amount of the incinerated material and the information data of the supply amount of the incinerated material of the incinerated material supply amount measuring unit 10. Judge whether it is appropriate in relation to.

By determining whether the acid gas concentration (C1) after treatment is appropriate in relation to the control concentration (C2) from the results of the analysis as described above, the operator of the exhaust gas treatment system 1 in particular , It is possible to recognize that the acid gas treatment agent is excessively added, which gives an opportunity to consider reducing the amount of the acid gas treatment agent added, and suppresses the excessive addition of the acid gas treatment agent. Can be done.

Hereinafter, each component of the exhaust gas treatment system 1 will be described in detail.

[Incinerator supply amount measurement unit]
The incinerator supply amount measuring unit 10 is located on the upstream side of the exhaust gas treatment unit 12 and measures the incinerator supply amount. Then, the incinerator supply amount measuring unit 10 is connected to the processing agent addition management unit 21 and the server unit 22 in a state in which information data can be transmitted at least. The incinerated material supply amount measuring unit 10 transmits the information data processing agent addition management unit 21 and the server unit 22, and here, the information data is determined by the processing agent addition management unit 21 and the amount of the acid gas processing agent added is determined. By using it for determining whether or not the post-treatment acid gas concentration (C1) in the server unit 22 is appropriate, the accuracy of those determinations can be further improved.

The incinerator supply amount measuring unit 10 is not particularly limited as long as it can quantitatively measure the amount of the incinerator, such as the weight or volume of the incinerator, but for example, a weigh scale or the like can be used. As an example, a crane used to put an incinerator into an incinerator is provided with a weighing scale on its arm, and the weight of the incinerator that can be grasped by the arm and put into the incinerator can be measured. By accumulating the information on this weight, the supply amount of the incinerator can be measured.

In FIG. 1, the incinerator supply amount measuring unit 10 is arranged on the upstream side (in the flow of incinerator / exhaust gas) of the incinerator F, but the position of the incinerator supply amount measuring unit 10 is exhaust gas. It may be located on the upstream side of the processing unit 12, and may be provided inside the incinerator F, for example.

[Exhaust gas treatment unit]
The exhaust gas treatment unit 12 treats the acid gas contained in the exhaust gas. As described above, since the exhaust gas is an acid gas containing hydrogen chloride and sulfur oxides, it is necessary to neutralize the acid gas and suppress the emission of harmful gas to the environment prior to the emission to the atmosphere. Therefore, the exhaust gas treatment unit 12 neutralizes the acidic gas contained in the exhaust gas by adding an acid gas treatment agent.

Details will be described later, but as the acid gas treatment agent, for example, an alkaline agent is used. By contacting such an acid gas treating agent with the exhaust gas, the acid gas contained in the contacted exhaust gas can be neutralized.

The exhaust gas treatment unit 12 is not particularly limited as long as it can bring the exhaust gas into contact with a solid treatment agent to react with each other. can do. Of these, as the flue, a part of a transfer pipe or the like for transferring gas to a dust collector such as a bag filter in the subsequent stage may be specifically used (hereinafter, in particular, the flue as the exhaust gas treatment unit 11 is used. Sometimes called a "reaction tube"). Further, the exhaust gas treatment unit 11 can also be composed of a closed container additionally provided in the flue (gas flow path), various reaction containers, and the like. For convenience, the space between these reactions is referred to as an "exhaust gas treatment unit", but as described above, the actual neutralization reaction may also occur in the fly ash recovery unit 16.

The exhaust gas is not particularly limited as long as it contains acid gas, and its source and contained components are not particularly limited. For example, exhaust gas generated by incineration of various wastes can be used.

Exhaust gas treatment can be performed continuously. Further, for example, a closed container or various reaction containers for vapor phase reaction may be used, and the batch method may be used. In any case, the amount of exhaust gas to be treated is not particularly limited, and the amount of exhaust gas generated by incineration of waste can be appropriately designed.

[Treatment agent storage unit]
The treatment agent storage unit 13 is not an essential component of the present invention, but is for storing an acid gas treatment agent to be supplied to the exhaust gas treatment unit 12.

The treatment agent storage unit 13 is not particularly limited as long as it can store the treatment agent, and for example, a storage tank or a silo can be used.

The storage capacity and shape of the treatment agent storage unit 13 are not particularly limited, and are appropriately designed in consideration of the installation space, the operation plan of exhaust gas treatment, the amount of exhaust gas treated, the frequency of treating exhaust gas, the frequency of ordering treatment agents, and the like. can do.

[Treatment agent supply unit]
The treatment agent supply unit 14 supplies the acid gas treatment agent stored in, for example, the treatment agent storage unit 13 to the exhaust gas treatment unit 12 in response to the instruction of the treatment agent addition control unit 21 described later.

The treatment agent supply unit 14 may have a configuration in which a predetermined amount of the acid gas treatment agent can be supplied from the treatment agent storage unit 13 to the exhaust gas treatment unit 12, and is not particularly limited. For example, a quantitative feeder, a pump, or a powder supply unit. It can be configured with a machine.

(Acid gas treatment agent)
The acid gas treatment agent has a property (alkaline) of neutralizing the acid gas in the exhaust gas. The acid gas treatment agent is not particularly limited and may be in the form of a liquid or powder (solid state), but the amount of the acid gas added can be determined by analyzing the amount of the acid gas to be treated. It is necessary to have a component that can be calculated.

The acidic gas treatment agent is not particularly limited, and for example, calcium hydroxide, calcium oxide, calcium carbonate, magnesium hydroxide, magnesium oxide, magnesium carbonate, calcium hydroxide-magnesium hydroxide, calcium oxide-magnesium oxide. , Calcium carbonate-magnesium carbonate, sodium hydroxide, sodium hydrogen carbonate, sodium carbonate and the like can be used. One type of treatment agent may be used alone, or two or more types may be used in combination.

When a powdery acid gas treating agent is used, the average particle size thereof is preferably 1 μm or more, more preferably 2 μm or more, and further preferably 5 μm or more. When the average particle size of the acid gas treating agent is 1 μm or more, the powder can be appropriately brought into contact with the acid gas without being scattered too much. The average particle size of the acid gas treatment agent is preferably 50 μm or less, more preferably 40 μm or less, and even more preferably 30 μm or less. When the average particle size of the acid gas treatment agent is 50 μm or less, it is possible to secure a large specific surface area of the acid gas treatment agent sufficiently for contact with the acid gas.

The instruction regarding the addition amount of the acid gas treatment agent transmitted from the treatment agent addition control unit 21 is transmitted to, for example, a treatment agent supply unit 14 such as a quantitative feeder provided on the upstream side of the exhaust gas treatment unit 12, and the instruction is given. Based on this, the treatment agent supply unit 14 can be operated to add a predetermined amount of the acid gas treatment agent to the exhaust gas treatment unit 12.

[Treatment agent supply amount measurement unit]
The treatment agent supply amount measuring unit 15 measures the supply amount of the acid gas treatment agent supplied from the treatment agent supply unit 14. Then, the processing agent supply amount measuring unit 15 is connected to the processing agent addition management unit 21 and the server unit 22 in a state in which information data can be transmitted at least. The processing agent supply amount measuring unit 15 transmits the information data processing agent addition management unit 21 and the server unit 22, and here, the information data is determined by the processing agent addition management unit 21 to determine the amount of the acid gas processing agent added. By using it for determining whether or not the post-treatment acid gas concentration (C1) in the server unit 22 is appropriate, the accuracy of those determinations can be further improved.

The treatment agent supply amount measuring unit 15 is not particularly limited as long as it can measure the supply amount of the acid gas treatment agent, and a weigh scale can be used as an example. Alternatively, when a motor-type supply device is used as the processing agent supply unit 14, it may be configured by a recording / arithmetic device connected to an inverter for controlling the motor. Specifically, when the relationship between the frequency (Hz) of the inverter and the supply amount (kg / h) of the acid gas treatment agent per hour (for example, a calibration curve) is obtained in advance and the inverter is actually operated. The integrated supply amount of the acid gas treatment agent can be calculated from the integrated amount of the frequencies of. With such a configuration, the amount of the acid gas treatment agent added can be obtained more easily.

[Fly ash recovery unit]
The fly ash recovery unit 16 is not an essential component of the present invention, but from the exhaust gas treated by the exhaust gas treatment unit 12, solid components, specifically, mainly fly ash and unreacted acid gas treatment agent. The mixture (hereinafter, simply referred to as "fly ash" for convenience) is separated and recovered. According to the exhaust gas treatment system 1 of the present embodiment, the content of the acid gas treatment agent contained in the fly ash collected here and finally discarded can be reduced as compared with the conventional exhaust gas treatment system. can.

The fly ash recovery unit 16 is not particularly limited as long as it can separate the gas contained in the exhaust gas and the solid component (fly ash) and recover the solid component, but for example, a bag filter or the like may be used. can.

[Processing temperature measurement unit]
The treatment temperature measuring unit 17 is not an essential component of the present invention, but is located on the downstream side of the exhaust gas treatment unit 12 at any position from the fly ash recovery unit 16 and the exhaust gas treatment unit 12 to the fly ash recovery unit 16. Measure the processing temperature. There is a correlation between this treatment temperature and the required amount of acid gas treatment agent (minimum addition amount described later). In FIG. 1, the treatment temperature measuring unit 17 is provided in the fly ash recovery unit 16, but the position thereof is the exhaust gas treatment unit 12 or the piping between the exhaust gas treatment unit 12 and the fly ash recovery unit 16. May be good. Then, the processing temperature measuring unit 17 is connected to the processing agent addition management unit 21 and the server unit 22 in a state in which information data can be transmitted at least. The processing temperature measuring unit 17 transmits the information data processing agent addition management unit 21 and the server unit 22, and here, the information data is determined by the processing agent addition management unit 21 to determine the amount of the acid gas processing agent added, and the server unit. By using it for determining whether or not the post-treatment acid gas concentration (C1) in No. 22 is appropriate, the accuracy of those determinations can be further improved.

The processing temperature measuring unit 17 is not particularly limited as long as it measures the temperature of the exhaust gas, and a K-type thermocouple type thermometer or the like can be used.

[Fly ash storage]
Although the fly ash storage unit 18 is not an essential component of the present invention, the fly ash as a solid material recovered by the fly ash recovery unit 16 is subjected to the subsequent fly ash treatment (fixation of heavy metals). It is for temporary storage.

The fly ash storage unit 18 is not particularly limited as long as it can store fly ash, but for example, a storage tank or a silo can be used.

The storage capacity and shape of the fly ash storage unit 18 are not particularly limited, and the installation space, operation plan for exhaust gas treatment, exhaust gas treatment amount, exhaust gas treatment frequency, fly ash generation amount, fly ash treatment frequency, etc. Can be appropriately designed in consideration of.

The fly ash stored in the fly ash storage unit 18 cannot be reused, and is reclaimed after being subjected to necessary treatment such as detoxification of heavy metals.

[Fly ash analysis department]
Although the fly ash analysis unit 19 is not an essential component of the present invention, it is located on the downstream side of the exhaust gas treatment unit 12 and analyzes the alkalinity of the fly ash collected by the fly ash recovery unit 16.

The fact that the fly ash after the treatment is alkaline means that there is an acid gas treatment agent that was not used in the neutralization reaction with the acid gas to be treated even though it was added to the exhaust gas treatment unit 12. Means to do. Therefore, the alkalinity of fly ash after the treatment is an index of the excess amount of the alkaline agent. Therefore, this alkalinity information data is sent to the server unit 22, which will be described later, and the server unit 22 determines whether the processed acid gas concentration (C1) is appropriate in relation to the control concentration (C2). , The accuracy of the determination can be further improved. Further, the alkalinity information data is sent to the treatment agent addition control unit 21, which will be described later, and the treatment agent addition control unit 21 performs feedback control regarding the addition amount of the acid gas treatment agent to reduce the addition amount of the acid gas treatment agent. It can be calculated more accurately.

As an index of alkalinity, for example, "acid consumption (pH 8.3)" can be used. Here, "acid consumption (pH 8.3)" refers to the amount of acid consumed when acid is added and neutralized until the pH reaches 8.3. The acid consumption (pH 8.3) in fly ash is a value measured with respect to the obtained solution by adding 1 L of pure water to 1 g of the fly ash (unit: mg-CaCO ₃ / g-fly ash). ).

[Pre-treatment exhaust gas analysis unit and post-treatment exhaust gas analysis unit]
The pre-treatment exhaust gas analysis unit 11 and the post-treatment exhaust gas analysis unit 20 are installed on the upstream side and the downstream side (in the flow of exhaust gas) of the exhaust gas treatment unit 12, respectively. Then, the pre-treatment exhaust gas analysis unit 11 and the post-treatment exhaust gas analysis unit 20 indicate the concentration of the acid gas contained in the exhaust gas before and after the addition of the acid gas treatment agent (hereinafter, “pre-treatment acid gas concentration” and “after treatment”, respectively. It is also called "acid gas concentration"). The pre-treatment exhaust gas analysis unit 11 and the post-treatment exhaust gas analysis unit 20 are connected to the treatment agent addition management unit 21 and the server unit 22 in a state in which information data can be transmitted at least. The pre-treatment exhaust gas analysis unit 11 and the post-treatment exhaust gas analysis unit 20 transmit to the information data processing agent addition control unit 21 and the server unit 22, and here the information data is transmitted to the acid gas treatment agent in the treatment agent addition control unit 21. By using it for determining the amount of addition and whether or not the post-treatment acid gas concentration (C1) in the server unit 22 is appropriate, the accuracy of those determinations can be further improved. The pre-treatment exhaust gas analysis unit 11 and the post-treatment exhaust gas analysis unit 20 differ only in their installation locations, and differ only in that they are on the upstream side or the downstream side (in the flow of exhaust gas) with the exhaust gas treatment unit 12 as a boundary. , Both will be described together below.

Although FIG. 1 shows an example in which the pre-treatment exhaust gas analysis unit 11 and the post-treatment exhaust gas analysis unit 20 are arranged on the upstream side and the downstream side of the exhaust gas treatment unit 12, respectively, the upstream side of the exhaust gas treatment unit 12 is shown. Of the side and the downstream side, it may be arranged at least on the downstream side, that is, the pretreatment exhaust gas analysis unit 11 is an arbitrary component. However, as shown in FIG. 1, by disposing it on both the upstream side and the downstream side, the treatment agent addition control unit 21 determines the amount of the acid gas treatment agent added, and the server unit 22 determines the post-treatment acidity. It is possible to further improve the accuracy of determining whether or not the gas concentration (C1) is appropriate. Further, one or a plurality of pre-treatment exhaust gas analysis units 11 and post-treatment exhaust gas analysis units 20 may be arranged on the upstream side and the downstream side, respectively.

The pre-treatment exhaust gas analysis unit 11 can measure the concentration of acid gas contained in the exhaust gas to be treated by the exhaust gas treatment unit 12. The acid gas concentration can be determined, for example, using an acid gas densitometer or the like, whereby the amount of acid gas treatment agent required to neutralize the acid gas can be calculated, and this information data is processed. It is also possible to transmit to the agent addition control unit 21 and determine the addition amount of the acid gas treatment agent in the treatment agent supply unit 14 there. If the purpose is only to control the amount of acid gas treatment agent, a predetermined volume of exhaust gas is sampled, and an alkaline compound is actually added to neutralize the acid gas contained in the exhaust gas. The amount of gas treatment agent may be calculated.

The post-treatment exhaust gas analysis unit 20 can measure the concentration (C1) of the acid gas contained in the exhaust gas after the treatment by the exhaust gas treatment unit 12 by the same method as the pre-treatment exhaust gas analysis unit 11 described above. can. As a result, harmful acid gas is monitored to prevent such acid gas from being released to the outside air, and at least the amount calculated based on the amount of acid in the exhaust gas of the treated exhaust gas analysis unit 20. It can be confirmed whether or not the acid gas treatment agent is sufficiently neutralized. When the treated exhaust gas analysis unit 20 is arranged, the treated exhaust gas analysis unit 20 is preferably arranged on the downstream side in the positional relationship with the fly ash recovery unit 16, but it may be arranged on the upstream side. good.

The pre-treatment exhaust gas analysis unit 11 and the post-treatment exhaust gas analysis unit 20 each measured the amount of exhaust gas (flow rate) together with the concentration of acid gas contained in the exhaust gas before and after the addition of the acid gas treatment agent, and measured the amount (flow rate) accordingly. It may have information data of the flow rate. Since the amount of exhaust gas hardly changes before and after the addition of the acid gas treatment agent, either one may be used. By measuring the amount of exhaust gas in this way, the absolute amount of acid gas contained in the exhaust gas can be calculated together with the information data of the acid gas concentration, and the minimum required amount of acid gas treatment agent can be calculated more accurately. Can be calculated. In this case, as the pre-treatment exhaust gas analysis unit 11 and the post-treatment exhaust gas analysis unit 20, for example, a gas flow meter or the like can be used in addition to the above-mentioned device for calculating the concentration of acid gas.

[Treatment agent addition control department]
The treatment agent addition control unit 21 calculates and calculates the amount of the acid gas treatment agent added so that the post-treatment acid gas concentration (C1) measured by the post-treatment exhaust gas analysis unit 20 is always equal to or less than a predetermined control concentration (C2). The treatment agent supply unit 14 is instructed to supply the added amount of the acid gas treatment agent to the exhaust gas treatment unit 12.

The processing agent addition management unit 21 includes at least an arithmetic unit, a recording device, and a communication device.

The means for controlling the addition of the acid gas treatment agent is not particularly limited as long as it can calculate the amount of the acid gas treatment agent added at a predetermined control concentration (C2) or less, but as an example, the pretreatment exhaust gas analysis unit. 11. Hereinafter, more specifically, a method of calculating the minimum addition amount of the acid gas treating agent required for treating the acid gas in the exhaust gas from the concentration of the acid gas contained in the exhaust gas before the treatment will be described. do.

_{First, the mass Watid} [kg / h] of the acid gas to be treated per hour is calculated by the following formula (1).
W _acid = (C _{acid, in-} C _{acid, out} ) x V _g / 10 ⁶ ... (1)
_{Here, C acid, in [mg /} Nm 3] and _{C acid, out [mg / Nm} 3] is the concentration of acid gas before and after treatment with the respective acid gas treatment agent, these _{C acid, out} [ mg / Nm ³ ] is the control concentration (C2). Further, V _g [Nm ³ / h] is the processing volume of the exhaust gas in the standard state (0 ° C., 1 atm) in terms of dry gas per hour. V _g may be a constant when the flow rate of the gas to be treated is substantially constant, and when the flow rate of the gas fluctuates greatly, the exhaust gas flow meter (including the inlet or outlet) is placed in the flow path. (Not shown) may be provided to actually measure.

Here, the "controlled concentration" refers to a concentration that should be controlled at the time of emission, such as an emission standard concentration. Then, at this control concentration (C2), it can be said that the amount of the acid gas treatment agent added in order to obtain the emission reference concentration or the like is in a state where there is no excess or deficiency with respect to the amount of the acid gas.

Next, the amount of acid gas treating agent _Walkaline [kg / h] required for treating the acid gas is calculated by the following formula (2).
W _alkali = n _acid × W _acid × M _{w, alkali} / (n _alkali × M _{w, acid} ) ・ ・ (2)
Here, M _{w, acid} [g / mol] and M _{w, alkali} [g / mol] are the molecular weights of the acidic compound constituting the acidic gas and the molecular weight of the alkali constituting the acidic gas treatment agent, respectively, and n _acid. Is the acid valence of the acidic gas, and _nalkaline is the alkaline valence of the alkali constituting the acidic gas treatment agent.

_{Here, by substituting the equation (1) for the W acid} in the equation (2) and rearranging it, the following equation (3) is obtained.
W _alkali = {n _acid × (C _{acid, in} −C _{acid, out} ) × M _{w, alkali} / (n _alkali × M _{w, acid} )} × V _g / 10 ⁶・ ・ (3)

_{The amount obtained by adding a predetermined surplus amount (safety amount) to the minimum addition amount Walkaline} of the acid gas treatment agent obtained from the above formula (3) can be obtained as the addition amount of the acid gas treatment agent.

That is, as described above, in the normal operation of the exhaust gas treatment system 1, in order to cope with a sudden change in the properties of the exhaust gas, the amount of the acid gas treatment agent at the control concentration (C2) is more than the amount that is not excessive or deficient. A large amount of acid gas treatment agent is added. Then, in the exhaust gas treatment system 1, the operator tends to increase this surplus amount too much in consideration of safety, and therefore, an excess acid gas treatment agent is added, and a large amount of alkali remains in the fly ash. rice field.

On the other hand, ideally, the acid gas concentration in the treated exhaust gas should always be the control concentration (C2), or the difference from the control concentration (C2) should be as small as possible unless it exceeds it. preferable. Therefore, it is necessary for the operator of the exhaust gas treatment system 1 to confirm whether or not the exhaust gas is properly treated in relation to the control concentration (C2). Therefore, in the present invention, the server unit 22 is provided as a means for the operator of the exhaust gas treatment system 1 to confirm whether or not the exhaust gas treatment is properly performed in relation to the control concentration (C2). .. Hereinafter, the server unit 22 will be described.

[Server part]
The server unit 22 collects and analyzes information data from at least the post-treatment exhaust gas analysis unit 20, the treatment agent supply amount measurement unit 15, and the incinerated product supply amount measurement unit 10, and based on the analysis results, the post-treatment acid gas concentration (C1). ) Is appropriate in relation to the control concentration (C2). That is, the server unit 22 is connected to the post-treatment exhaust gas analysis unit 20, the treatment agent supply amount measurement unit 15, and the incinerator supply amount measurement unit 10 in a state in which at least information data can be received.

The server unit 22 includes at least an arithmetic unit, a recording device, and a communication device.

Specifically, as a determination method, for example, an average deviation concentration range (C2-C1) from the control concentration (C2) of the acid gas concentration (C1) after treatment is calculated, and this average deviation concentration range (C2-C1) is calculated. ) Is within the threshold value or not. From the viewpoint of considering the cost, the cost of excessive addition of the acid gas treatment agent is calculated based on this average deviation concentration range (C2-C1). More specifically, the amount of the acid gas treatment agent added in excess is calculated due to the existence of the average deviation concentration range (C2-C1), and the information that the server unit 22 has in advance in this amount is calculated. Data Unit price of acid gas treatment agent and empirical variables (variables based on the fact that the lower the removal rate of the acid gas treatment agent, the lower the reaction equal amount, and the variables that can be selected by those skilled in the art from that experience. ) Can be integrated to calculate the cost of excessive addition of the acid gas treatment agent. An example is a method of determining whether or not the excess addition cost calculated in this way is within the threshold value. The average deviation concentration range and the excess addition cost can be determined based on the integrated value for a certain period (for example, 1 day, 1 week, 2 weeks, 1 month, etc.) according to the operation of the exhaust gas treatment system 1. can.

Then, the server unit 22 makes a determination in this way, and the average deviation concentration width (C2-C1) is positive only when the average deviation concentration width (C2-C1) or the excess addition cost exceeds the threshold value. Reduce the amount of acid gas treatment agent added so that the value becomes narrower than the value of.

The server unit 22 may collect and analyze information data from the processing agent supply amount measurement unit 15 and the incinerator supply amount measurement unit 10. Specifically, the treatment agent supply amount per incinerator supply amount may be calculated to determine whether or not the treatment agent supply amount is appropriate.

Further, the server unit 22 is actually acidic with respect to the cost of the acid gas treatment agent when it is always operated at the controlled concentration (C2) for a certain period (for example, 1 day, 1 week, 2 weeks, 1 month, etc.). The achievement rate can be calculated by calculating the cost of gas and the like. Then, the server unit 22 may further have a function of notifying the person in charge of the exhaust gas treatment system 1 or a related person such as a treatment agent supplier of such an achievement rate.

The server unit 22 may have a function of notifying a person in charge (operator or the like) of the exhaust gas treatment system 1 or a related person such as a treatment agent supplier of the excess addition cost in a certain period. Further, the server unit 22 collects information data of the acid gas concentration (C1) and the control concentration (C2) after treatment, records them over time, and has a relationship with the person in charge of the exhaust gas treatment system 1 and the treatment agent supplier. It may have a function of notifying a person. In this way, the server unit 22 notifies the related parties of the excess addition cost in a certain period and the information data of the acid gas concentration (C1) and the control concentration (C2) after the treatment, so that, for example, the accountant can: It can be confirmed that the operator properly added the acid gas treatment without adding it excessively. In addition, the acid gas treatment agent manufacturer can confirm whether the performance of the acid gas treatment agent is optimally exhibited. Further, the manufacturer of the control device of the exhaust gas treatment system 1 can confirm whether the control of the system is optimally exhibited.

The server unit 22 may also have information data of the incinerator disposal unit price obtained by, for example, calculating at the time of operation of the past exhaust gas treatment system 1 or calculating by averaging from the past operation. For example, the weight of the incinerator is obtained by adding the unit price of the acid gas treatment agent to the actual amount of the acid gas treatment agent used and dividing this by the supply amount of the incinerator measured by the incinerator supply amount measuring unit 10. It is possible to calculate the actual unit price of incinerator disposal required for each treatment. This actual incinerator disposal unit price, the incinerator disposal unit price when treating exhaust gas generated from the incinerator discharged from the same business establishment, and the incinerator disposal unit price when treating exhaust gas having the same acid gas concentration. In comparison with, the actual unit price of incinerator disposal may be evaluated.

<Exhaust gas treatment method>
The exhaust gas treatment method according to the present embodiment is, for example, a method that can be performed using the exhaust gas treatment system 1 described above. Specifically, this exhaust gas treatment method includes a step of treating the acid gas contained in the exhaust gas by the exhaust gas treatment unit 12 and a step of supplying the acid gas treatment agent to the exhaust gas treatment unit 12 by the treatment agent supply unit 14. The step of measuring the post-treatment acid gas concentration (C1), which is the concentration of the acid gas contained in the exhaust gas after the treatment by the exhaust gas treatment unit, by the post-treatment exhaust gas analysis unit 20, and the treatment agent addition control unit 21. The amount of the acid gas treatment agent added at which the post-treatment acid gas concentration (C1) measured by the post-treatment exhaust gas analysis unit 20 is always equal to or less than the predetermined control concentration (C2) is calculated, and the calculated amount of acid gas treatment is performed. An gas gas treatment method including a step of instructing the treatment agent supply unit 14 to supply the agent to the exhaust gas treatment unit 12, and this gas exhaust treatment method is an incinerated product supply amount located on the upstream side of the exhaust gas treatment unit 12. A step of measuring the supply amount of the incinerated product by the measuring unit 15, a step of measuring the supply amount of the acid gas treating agent supplied from the processing agent supply unit 14 by the processing agent supply amount measuring unit 15, and a server unit 22. Therefore, at least the information data from the treated exhaust gas analysis unit 20, the treatment agent supply amount measurement unit 15, and the incinerated product supply amount measurement unit 10 are collected and analyzed, and from the analysis result, the post-treatment acid gas concentration (C1) is determined. The process of determining whether it is appropriate in relation to the control concentration (C2), and

Further, in this exhaust gas treatment method, the excess addition cost of the acid gas treatment agent is calculated based on the average deviation concentration range (C2-C1) of the acid gas concentration (C1) after treatment from the control concentration (C2). The step of reducing the amount of the acid gas treatment agent added so that the average deviation concentration range (C2-C1) becomes a positive value and narrows only when the excess addition cost exceeds the threshold value may be further included. preferable.

Since the more specific operation of this exhaust gas treatment method is the same as the operation of each part of the exhaust gas treatment system described above, detailed description here will be omitted.

1 Exhaust gas treatment system 10 Incinerator supply amount measurement unit 11 Pre-treatment exhaust gas analysis unit 12 Exhaust gas treatment unit 13 Treatment agent storage unit 14 Treatment agent supply unit 15 Treatment agent supply amount measurement unit 16 Fly ash recovery unit 17 Treatment temperature measurement unit 18 Fly ash Ash storage section 19 Fly ash analysis section 20 Post-treatment exhaust gas analysis section 21 Treatment agent addition control section 22 Server section F Incinerator

<Exhaust gas treatment method>
The exhaust gas treatment method according to the present embodiment is, for example, a method that can be performed using the exhaust gas treatment system 1 described above. Specifically, this exhaust gas treatment method includes a step of treating the acid gas contained in the exhaust gas by the exhaust gas treatment unit 12 and a step of supplying the acid gas treatment agent to the exhaust gas treatment unit 12 by the treatment agent supply unit 14. The post-treatment exhaust gas analysis unit 20 measures the post-treatment acid gas concentration (C1), which is the concentration of the acid gas contained in the exhaust gas after treatment by the exhaust gas treatment unit, and the treatment agent addition control unit 21. The amount of the acid gas treatment agent added at which the post-treatment acid gas concentration (C1) measured by the post-treatment exhaust gas analysis unit 20 is always equal to or less than the predetermined control concentration (C2) is calculated, and the calculated amount of acid gas treatment is performed. An exhaust gas treatment method including a step of instructing the treatment agent supply unit 14 to supply the agent to the exhaust gas treatment unit 12, and this exhaust gas treatment method is an incinerated product supply amount located on the upstream side of the exhaust gas treatment unit 12. A step of measuring the supply amount of the incinerated product by the measuring unit 15, a step of measuring the supply amount of the acid gas treating agent supplied from the processing agent supply unit 14 by the processing agent supply amount measuring unit 15, and a server unit 22. Therefore, at least the information data from the post-treatment exhaust gas analysis unit 20, the treatment agent supply amount measurement unit 15, and the incinerated product supply amount measurement unit 10 are collected and analyzed, and from the analysis result, the post-treatment acid gas concentration (C1) is determined. This is an exhaust gas treatment method further including a step of determining whether or not the substance is appropriate in relation to the control concentration (C2).

Claims (9)

An exhaust gas treatment unit that treats acid gas contained in exhaust gas,
A treatment agent supply unit that supplies an acid gas treatment agent to the exhaust gas treatment unit,
A post-treatment exhaust gas analysis unit that measures the post-treatment acid gas concentration (C1), which is the concentration of the acid gas contained in the exhaust gas after treatment by the exhaust gas treatment unit.
The amount of the acid gas treatment agent added at which the post-treatment acid gas concentration (C1) measured by the post-treatment exhaust gas analysis unit is always equal to or less than the predetermined control concentration (C2) is calculated, and the calculated amount of acid gas treatment is performed. A treatment agent addition control unit that instructs the treatment agent supply unit to supply the agent to the exhaust gas treatment unit,
It is an exhaust gas treatment system equipped with
The exhaust gas treatment system is
An incinerator supply amount measuring unit located on the upstream side of the exhaust gas treatment unit and measuring the incinerator supply amount,
A treatment agent supply amount measurement unit that measures the supply amount of the acid gas treatment agent supplied from the treatment agent supply unit, and a treatment agent supply amount measurement unit.
From the results of collecting and analyzing at least the information data from the post-treatment exhaust gas analysis unit, the treatment agent supply amount measurement unit, and the incinerated product supply amount measurement unit, the post-treatment acid gas concentration (C1) is the said. The server unit that determines whether it is appropriate in relation to the control concentration (C2),
Exhaust gas treatment system further equipped with. The exhaust gas treatment system according to claim 1, wherein the server unit further has information data on a unit price of an acid gas treatment agent and a unit price of incinerator disposal. A pre-treatment exhaust gas analysis unit for measuring the amount of exhaust gas and the pre-treatment acid gas concentration, which is the concentration of the acid gas contained in the exhaust gas, before the treatment by the exhaust gas treatment unit is further provided on the upstream side of the exhaust gas treatment unit.
The exhaust gas treatment system according to claim 1 or 2, wherein the server unit also has information data from the pretreatment exhaust gas analysis unit. On the downstream side of the exhaust gas treatment unit, the fly ash recovery unit, the treatment temperature measurement unit that measures the processing temperature at any position from the exhaust gas treatment unit to the fly ash recovery unit, and the fly ash recovery unit processed the treatment. It also has a fly ash analysis unit that analyzes the alkalinity of fly ash.
The exhaust gas treatment system according to claim 1, 2 or 3, wherein the server unit also has information data from the processing temperature measuring unit and the fly ash analysis unit. The treatment agent addition control unit calculates the excess addition cost of the acid gas treatment agent based on the average deviation concentration range (C2-C1) of the acid gas concentration (C1) after the treatment from the control concentration (C2). 1. The amount of the acid gas treatment agent added is reduced so that the average deviation concentration range (C2-C1) becomes a positive value and narrows only when the excess addition cost exceeds the threshold value. 4. The exhaust gas treatment system according to any one of 4. The exhaust gas treatment system according to claim 5, wherein the treatment agent addition management unit further has a function of notifying related parties such as a person in charge of the exhaust gas treatment system and a treatment agent supplier of the excess addition cost in a certain period. .. The server unit collects information data of the acid gas concentration (C1) after the treatment and the control concentration (C2), records them over time, and has a relationship with the person in charge of the exhaust gas treatment system, the treatment agent supplier, and the like. The exhaust gas treatment system according to any one of claims 1 to 6, further comprising a function of notifying a person. The process of treating the acid gas contained in the exhaust gas by the exhaust gas treatment unit,
A step of supplying an acid gas treatment agent to the exhaust gas treatment unit by the treatment agent supply unit, and
A step of measuring the post-treatment acid gas concentration (C1), which is the concentration of the acid gas contained in the exhaust gas after the treatment by the exhaust gas treatment unit, by the post-treatment exhaust gas analysis unit.
The treatment agent addition control unit calculates and calculates the amount of the acid gas treatment agent added so that the post-treatment acid gas concentration (C1) measured by the post-treatment exhaust gas analysis unit is always equal to or less than a predetermined control concentration (C2). A step of instructing the treatment agent supply unit to supply the added amount of the acid gas treatment agent to the exhaust gas treatment unit, and
It is an exhaust gas treatment method including
The exhaust gas treatment method is
A process of measuring the incinerator supply amount by the incinerator supply amount measurement unit located on the upstream side of the exhaust gas treatment unit, and
A step of measuring the supply amount of the acid gas treatment agent supplied from the treatment agent supply unit by the treatment agent supply amount measurement unit, and a step of measuring the supply amount of the acid gas treatment agent.
The server unit collects and analyzes information data from at least the post-treatment exhaust gas analysis unit, the treatment agent supply amount measurement unit, and the incinerated product supply amount measurement unit, and from the analysis results, the post-treatment acid gas concentration (C1). ) Is appropriate in relation to the control concentration (C2).
Exhaust gas treatment methods, including further. The excess addition cost of the acid gas treatment agent is calculated based on the average deviation concentration range (C2-C1) of the acid gas concentration (C1) after the treatment from the control concentration (C2), and the excess addition cost sets a threshold. The exhaust gas according to claim 8, further comprising a step of reducing the amount of the acid gas treatment agent added so that the average deviation concentration width (C2-C1) becomes a positive value and narrows only when it exceeds. Processing method.

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