JP2018066523A - Drug dosing device and treatment equipment of flue gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drug dosing device which stores a mercury adsorber such as active carbon, can dose the mercury adsorber into an exhaust gas path, and has a tank which can be arranged in an arbitrary place.SOLUTION: A drug dosing device comprises: a blower 42 for blowing air containing a mercury adsorber; a first tank 43 which can store a prescribed amount of the mercury adsorber; a supply path 45 for supplying air blown out of the blower 42 to the first tank 43; a first dosing path 46 for dosing the mercury adsorber which is stored in the first tank 43 into an exhaust gas path 13; and an opening/closing part 48 which can open and close the first dosing path 46. The first tank 43 is a cyclone-type dust collector for storing the mercury adsorber which is supplied together with air introduced from the blower 42 via the supply path 45 therein. The mercury adsorber which is stored in the first tank 43 is dosed into the exhaust gas path 13 via the first dosing path 46 when the opening/closing part 48 is opened.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a chemical charging device and a combustion exhaust gas treatment facility including the chemical charging device.

  Combustion exhaust gas generated when burning waste or coal may contain mercury. From the viewpoint of preventing air pollution, it is necessary to monitor mercury discharge to the environment and detect and deal with it early if mercury concentration in combustion exhaust gas increases abnormally.

  For example, in a waste incinerator, general waste that is incinerated daily contains almost no mercury. For this reason, normally, the mercury concentration in the combustion exhaust gas does not reach a problematic level without taking special measures against mercury. Therefore, in special cases, for example, when waste containing mercury is dumped into the incinerator waste pits and the amount of mercury in the combustion exhaust gas rises rapidly, this is detected early, and when there is such detection It is only necessary to take special mercury removal measures to remove mercury from the flue gas.

  As an apparatus that has taken such measures, there is one described in Patent Document 1. The mercury removal system described in Patent Document 1 is an activated carbon tank that can store activated carbon for adsorption of mercury and that can be put into the flue, and a continuous mercury that detects the concentration of mercury contained in the exhaust gas flowing through the flue. An analyzer, and means for opening a path for introducing activated carbon from the activated carbon tank into the flue when the mercury concentration detected by the continuous mercury analyzer exceeds a predetermined concentration. Here, in the mercury removal system described in Patent Document 1, it is described that when the activated carbon is replenished to the activated carbon tank, it is manually supplied from the replenishment port of the activated carbon tank (paragraph number [0031] of Patent Document 1). .

JP 2014-213308 A

  However, in the embodiment in which the activated carbon is manually refilled into the activated carbon tank as described above, there is a problem that the working environment is deteriorated due to the scattering of the activated carbon. Further, since the activated carbon is replenished sequentially, the volume of the activated carbon tank has to be very large, and there are problems of securing the tank space and the cost of the tank. Further, as another replenishment method, for example, there is a method of replenishing activated carbon to the activated carbon tank from a jet packer vehicle via a hose. In such a case, the location of the activated carbon tank is limited to a place where a space for receiving the jet packer car can be secured around the activated carbon tank, and the height at which the hose of the jet packer car can be inserted is limited. There was a problem that.

  Therefore, the present invention has an object to provide a chemical charging device including a tank that stores a mercury adsorbent such as activated carbon, can be charged into the exhaust gas path, and can be disposed at an arbitrary place. And

  The chemical injection device of the present invention is a chemical injection device capable of introducing a mercury adsorbent for adsorbing mercury contained in combustion exhaust gas into an exhaust gas passage, and a blower for blowing air containing the mercury adsorbent, and a predetermined amount A first tank capable of storing a mercury adsorbent, a supply path for supplying air blown from the blower to the first tank, and a mercury adsorbent stored in the first tank in the exhaust gas path. A mercury adsorbent that is supplied together with air introduced from the blower through a supply path; and a first charging path for charging and an opening / closing portion that can open and close the first charging path. Is a cyclone type dust collector configured to store the mercury adsorbent stored in the first tank through the first charging path when the opening / closing part is opened. Into the exhaust gas path It is characterized in.

  According to the medicine injection device of the present invention, the mercury adsorbent can be supplied and replenished to the first tank together with the air blown by the blower, whereby the first tank for storing the mercury adsorbent can be placed at any place. Even if it arrange | positions, it becomes possible to replenish the mercury adsorbent to a 1st tank. In addition, since the first tank is a cyclone type dust collector, it is possible to easily separate the air and the mercury adsorbent, and the mercury adsorbent is continuously removed from the first tank while discharging air from the first tank. Can be supplied and replenished. Furthermore, by opening an opening / closing part that opens and closes the first charging path, the mercury adsorbent stored in the first tank can be charged into the exhaust gas path via the first path.

It is a figure which shows the waste disposal facility containing the chemical | medical agent injection apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the detail of the chemical | medical agent injection apparatus in FIG. It is sectional drawing which shows the detail of the 1st tank in FIG. It is a figure which shows the detail of the chemical | medical agent injection apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the detail of the chemical | medical agent injection apparatus which concerns on Embodiment 3 of this invention.

(Embodiment 1)
FIG. 1 shows a drug input device 41a according to Embodiment 1 of the present invention and a waste treatment facility including the drug input device 41a. The waste treatment facility shown in FIG. 1 includes at least an incinerator 11, an exhaust gas passage 13, a bag filter 14, and a chemical charging device 41a. A chimney 15 is provided with an induction blower 16 on the upstream side of the chimney 15 in order to attract combustion exhaust gas. The exhaust gas path 13 is configured by a duct (pipe) or the like, and connects between apparatuses.

  The bag filter 14 is provided in the middle of the exhaust gas path 13 from the incinerator 11 to the chimney 15, and collects fly ash contained in the combustion exhaust gas.

  The incinerator 11 includes a hopper-structured garbage inlet 17, an incinerator 18, a feeding device 20 for feeding the garbage 19 introduced from the inlet 17 into the incinerator 18, an incinerator ash outlet 21, Is provided. 22 is a combustion ash receiving tank. The incinerator 18 is provided with a dry grate 23, a combustion grate 24, and a post-combustion grate 25 in this order.

  A first inlet 26 and a second inlet 27 for mercury adsorbent are provided at a position upstream of the bag filter 14 in the exhaust gas path 13. The chemical charging device 41 a can store the mercury adsorbent and can input the mercury adsorbent into the exhaust gas path 13 from the first input port 26 and the second input port 27. A mercury adsorbent is a powdery substance capable of adsorbing mercury. Mercury is adsorbed by introducing a mercury adsorbent into the exhaust gas passage 13 from the first inlet 26 and the second inlet 27. The fly ash accompanied with the mercury adsorbent after the mercury adsorption is collected by the bag filter 14.

  It is preferable that the mercury detection device 31 can continuously detect whether or not a large amount of mercury is contained in the combustion exhaust gas by capturing and analyzing the combustion exhaust gas. The mercury detection device 31 includes a mercury analysis device 32 for analyzing the amount of mercury, and a sample gas take-in unit 33 for the device 32. As shown in the drawing, the intake portion 33 of the mercury detection device 31 is located upstream of the bag filter 14 and upstream of the first inlet 26 and the second inlet 27 of the mercury adsorbent in the exhaust gas path 13. May be provided, may be provided at a position downstream of the bag filter 14, and further provided at a position upstream of the first input port 26 and the second input port 27; What is provided in the downstream rather than the bag filter 14 may be used together.

  The control unit 34 is configured to transmit a control signal to the opening / closing unit 48 (see FIGS. 2 and 3) of the medicine injection device 41a described later based on the detection result of the mercury detection device 31. The control unit 34 is connected to a detection signal line 35 from the mercury analyzer 32 of the mercury detection device 31 and a control signal line 36 to the opening / closing unit 48 of the medicine injection device 41a. When the intake part 33 of the mercury detection device 31 is provided upstream of the first input port 26 and the second input port 27 in the exhaust gas path 13 as shown in the drawing, the mercury control method is feedforward control. . On the other hand, when the taking-in part 33 is provided downstream from the bag filter 14, the mercury control method is feedback control.

  Further, a processing agent inlet 28 is provided in the exhaust gas path 13 at a position upstream of the bag filter 14. The processing agent tank 29 can store the processing agent and can input the processing agent stored through the opening / closing part 30 constituted by a valve or the like into the exhaust gas path 13 from the input port 28. As the treatment agent, for example, slaked lime [Ca (OH) 2] is used. When this treatment agent is introduced into the exhaust gas passage 13, it reacts with SOx, HCl, etc., and fly ash containing the treatment agent after the reaction is collected by the bag filter 14.

  Fly ash collected by the bag filter 14 is discharged from the bag filter 14 by backwashing the bag filter 14. The discharged fly ash is used for immobilizing heavy metals. The illustration and detailed description of the heavy metal processing facility for that purpose are omitted.

  FIG. 2 is a diagram showing details of the medicine injection device 41a according to the first embodiment. The medicine charging device 41 a includes a blower 42, a first tank 43, a second tank 44, a supply path 45, a first charging path 46, a second charging path 47, and an opening / closing part 48. . The blower 42 is a blower that generates an air flow inside the supply path 45. The first tank 43 is continuously replenished with a predetermined amount of powdery mercury adsorbent and can be stored.

  The supply path 45 is constituted by, for example, piping, and is provided for introducing an air flow generated by the blower 42 into the first tank 43. The supply path 45 is provided with a supply port 49 for supplying the mercury adsorbent into the supply path 45. The supply port 49 is provided in the supply path 45 from the blower 42 toward the first tank 43.

  The second tank 44 can store a mercury adsorbent. The second tank 44 is connected to a supply port 49 and has a supply device such as a table feeder (not shown). Thereby, the second tank 44 can supply the mercury adsorbent from the supply port 49 to the supply path 45. The supply device of the second tank 44 is not limited to the table feeder, and any device that can supply the mercury adsorbent to the supply path 45 may be used. When a table feeder is used as the supply device, it is advantageous in that the supply amount of the mercury adsorbent can be easily adjusted by changing the number of rotations of the table. When the mercury adsorbent is supplied from the second tank 44 to the supply path 45, the air downstream from the supply port 49 contains the mercury adsorbent, and the air containing the mercury adsorbent is the first tank 43. To be introduced.

  The first input path 46 connects the inside of the first tank 43 and the first input port 26 of the exhaust gas path 13. The opening / closing part 48 is constituted by a gate valve, for example, and can open and close the first charging path 46. The second input path 47 connects the inside of the first tank 43 and the second input port 27 of the exhaust gas path 13.

  FIG. 3 is a diagram showing details of the first tank 43. The first tank 43 is a cyclone type dust collector capable of separating a powdery mercury adsorbent and air, and includes an inlet 50, an outlet 51, an opening 52, a separation chamber 53, and a dust collector. Chamber 54. The separation chamber 53 includes a cylindrical portion 53a and a conical portion 53b provided below the cylindrical portion 53a. The inlet portion 50 is provided on the side wall of the cylindrical portion 53 a and is connected to the supply path 45. The outlet 51 is provided on the upper portion of the cylindrical portion 53 a and is connected to the second charging path 47. The dust collection chamber 54 is connected to the bottom of the conical portion 53b. The opening 52 is provided at the bottom of the dust collection chamber 54 and is connected to the first charging path 46. When the opening / closing part 48 closes the first charging path 46, the mercury adsorbent separated from the air is stored inside the dust collection chamber 54 of the first tank 43.

  When the air containing the mercury adsorbent is introduced into the first tank 43 from the inlet 50, the air is blown toward the inner wall of the cylindrical portion 53a. Centrifugal force and gravity act on the mercury adsorbent, and the mercury adsorbent falls to the bottom of the conical portion 53b while turning along the inner wall surface of the cylindrical portion 53a. As a result, the dust is stored in the dust collection chamber 54 connected to the bottom of the conical portion 53b, and the mercury adsorbent can be continuously supplied to the first tank 43 for replenishment. On the other hand, the air turns along the inner wall surface of the cylindrical portion 53 a and moves toward the bottom portion of the conical portion 53 b, then reverses upward and reaches the outlet portion 51 through the center of the separation chamber 53. The air discharged from the outlet 51 is introduced into the exhaust gas path 13 (see FIG. 2) via the second input path 47.

  By the way, when the amount of the mercury adsorbent stored in the first tank 43 reaches a predetermined threshold value, the mercury adsorbent is discharged from the outlet 51 to the outside of the first tank 43 together with the air, and the second input path. 47 and the second inlet 27 are continuously charged into the exhaust gas path 13. Thereby, when a small amount of mercury is constantly contained in the combustion exhaust gas, or harmful substances contained in the combustion exhaust gas can be removed. This threshold value depends on the shape and volume of the dust collection chamber 54. Therefore, what is necessary is just to design the shape and volume of the dust collection chamber 54 suitably according to the quantity of the mercury adsorbent to store in the 1st tank 43. FIG. In this way, the first tank 43 can store a predetermined amount of mercury adsorbent.

Here, the exhaust gas passage 13 is in a decompressed state because the combustion exhaust gas is attracted to the bag filter 14 side by the induction blower 16 (see FIG. 1). Therefore, when the opening / closing part 48 is opened, the mercury adsorbent stored in the dust collection chamber 54 is drawn into the exhaust gas passage 13, and thus the mercury adsorbent can be introduced. The input amount of the mercury adsorbent is adjusted, for example, so that the concentration of the mercury adsorbent in the combustion exhaust gas becomes 0.01 to 100 g / m ³ N. By introducing the mercury adsorbent from the first tank 43 into the exhaust gas path 13, the mercury adsorbent stored in the dust collection chamber 54 is consumed.

  According to the medicine injection device 41a according to the present embodiment, it is possible to replenish the mercury adsorbent to the first tank 43 even if the first tank 43 is arranged at an arbitrary place. This is because when the mercury adsorbent in the first tank 43 is consumed, replenishment of the mercury adsorbent to the first tank 43 automatically and continuously with the air from the second tank 44 through the supply path 45. It is because it is performed by being supplied.

  The location of the first tank 43 is preferably higher than the first inlet 26 of the exhaust gas path 13 from the ground, and more preferably directly above the first inlet 26. In this case, when the opening / closing part 48 is opened, the mercury adsorbent stored in the first tank 43 is not only caused by the action of the reduced pressure state of the exhaust gas path 13 but also by the gravity action of the mercury adsorbent itself. 13 and the charging operation can be performed quickly.

  Here, the arrangement place of the second tank 44 is a place where a space for receiving the jet packer car can be secured around the second tank 44, and a height at which the hose from the jet packer car can be inserted. Is preferred. By doing so, it is possible to efficiently replenish the second tank 44 with the mercury adsorbent.

  That is, even if the medicine input device 41a according to the present embodiment has no space for receiving the jet packer car around the first tank 43 and is provided in a place where the hose of the jet packer car does not reach, the second tank It is possible to supply the first tank 43 from 44 with the mercury adsorbent together with the air and replenish it.

  By the way, transmission of the control signal to the opening / closing unit 48 is performed by the control unit 34 (see FIG. 1) as described above. When waste containing mercury is introduced into the incinerator 11, the mercury is evaporated by the heat in the furnace and evaporated into the combustion exhaust gas. As a result, the amount of mercury in the combustion exhaust gas increases rapidly. Then, the combustion exhaust gas containing a large amount of mercury is taken into the mercury analyzer 32 from the take-in part 33 of the mercury detector 31 as a sample gas containing mercury.

  It is preferable that the mercury analyzer 32 detects atomic mercury but does not detect mercury compounds such as soluble mercury salts. In this case, the mercury analyzer 32 removes soot and dust with a filter and does not reduce the mercury compound such as the soluble mercury salt in the mercury into atomic mercury and the mercury compound such as the soluble mercury salt and the atomic mercury. A sample gas containing both of these can be used for analysis.

  For this reason, the mercury analyzer 32 immediately detects that the amount of detected mercury has rapidly increased by detecting only atomic mercury in a state where it does not require time to reduce the mercury compound to atomic mercury (high-speed response). )can do. Then, the detection signal is sent to the control unit 34. Upon receipt of the detection signal, the control unit 34 opens the opening / closing unit 48 and introduces the mercury adsorbent in the first tank 43 into the exhaust gas path 13 to adsorb mercury. Let it be done.

As a result, when mercury in the combustion exhaust gas increases rapidly, it is possible to quickly perform adsorption removal. That is, when the mercury detection device 31 detects a sharp peak exceeding a specified value for the mercury concentration of the combustion exhaust gas, for example, a rapid peak of 0.01 mg / m ³ N or more within 1 minute, the mercury adsorbent is quickly used. Can be thrown in. Hereinafter, such a mercury detection device may be referred to as a high-speed response device.

  Instead of the high-speed response device described above or together with the high-speed response device, as a mercury analyzer, a mercury compound such as soluble mercury in the combustion exhaust gas is reduced to atomic mercury and then originally present in the combustion exhaust gas. It is also possible to use a device that detects the total concentration of atomic mercury that has been stored (hereinafter sometimes referred to as a total mercury analyzer). In that case, although it takes a considerable time for the measurement, mercury compounds such as availability mercury in the combustion exhaust gas can be reliably removed, and the mercury concentration can be accurately detected.

  Also in the total mercury analyzer, the intake portion 33 may be provided upstream of the first input port 26 and the second input port 27 for feedforward control, and the intake portion 33 is downstream of the bag filter 14. The feedback control may be provided on the side, and the feedforward control and the feedback control may be used in combination.

  In addition, although the chemical | medical agent injection device 41a which concerns on this Embodiment is an aspect provided with the 2nd tank 44 which can supply activated carbon to the supply path 45 from the supply port 49, this invention is not limited to this aspect.

  Further, as the mercury adsorbent, for example, activated carbon is used, but the present invention is not limited to this. In addition to activated carbon alone, activated carbon containing iodine or sulfur may be used as the mercury adsorbent. In addition, any powder material capable of adsorbing mercury may be used.

  A plurality of first tanks 43 may be installed. When a plurality of first tanks 43 are installed, various mercury adsorbents can be used for each first tank 43, so that it is possible to appropriately cope with the situation of the mercury concentration in the combustion exhaust gas. Each open / close section 48 corresponding to each first tank 43 includes a mercury analyzer and / or combustion exhaust gas for detecting atomic mercury in a state where a mercury compound such as soluble mercury salt of mercury is not reduced to atomic mercury. Feedforward control and / or feedback control is preferably performed by a mercury analyzer (total mercury analyzer) that detects atomic mercury after reducing a mercury compound such as soluble mercury therein to atomic mercury.

  By the way, although the chemical | medical agent injection device 41a which concerns on this Embodiment is an aspect used for a waste disposal facility, this invention is not limited to this aspect. In addition to the waste treatment facility, the chemical charging device 41a is also suitably used for facilities that process combustion exhaust gas that may contain mercury, such as facilities that burn coal.

(Embodiment 2)
Next, the medicine injection device according to Embodiment 2 of the present invention will be described. As shown in FIG. 1, the combustion exhaust gas treatment facility according to the first embodiment is a mode including a treatment agent tank 29 separately from the chemical charging device 41 a, but as shown in FIG. In this embodiment, the treatment agent tank is incorporated as the third tank 55 in the medicine injection device 41b. Hereinafter, the configuration different from the configuration of the first embodiment will be mainly described, and the detailed description of the same configuration as the first embodiment will be omitted.

  A supply port 56 for supplying the processing agent to the second charging path 47 is provided in the second charging path 47 according to the second embodiment. The supply port 56 is connected to the third tank 55. The treating agent is, for example, slaked lime [Ca (OH) 2] and treats substances other than mercury.

  The third tank 55 can store the processing agent and can supply the processing agent to the second charging path 47 from the supply port 56. Specifically, the third tank 55 has a supply device such as a table feeder, and the supply agent can be supplied to the second charging path 47 by the supply device. The processing agent supplied to the second input path 47 is input to the exhaust gas path 13 through the second input port 27 by the air flow generated by the blower. By introducing the treatment agent into the exhaust gas path 13, fly ash containing a reaction product of SOx or HCl and the treatment agent is generated, and the generated fly ash is collected by the bag filter 14 (see FIG. 1). The

  According to the medicine charging device 41b according to the present embodiment, since the third tank 55 as the processing agent tank is incorporated in the medicine charging device 41b, the processing agent tank 29 is separately provided as shown in FIG. It is possible to reduce the size of the equipment as compared with the aspect of providing. Further, by using the blower 42 for supplying the mercury adsorbent together with air to the first tank 43, the processing agent is introduced into the exhaust gas path 13, and a blower is separately provided for introducing the processing agent into the exhaust gas path 13. This eliminates the need for efficient introduction of the treating agent.

(Embodiment 3)
Next, a drug injection device according to Embodiment 3 of the present invention will be described. In the third embodiment, as in the second embodiment, the treatment agent tank is incorporated as the third tank 55 in the medicine charging device 41c. Hereinafter, the configuration different from the configuration of the second embodiment will be mainly described, and the detailed description of the same configuration as the second embodiment will be omitted.

  In the medicine injection device 41c according to Embodiment 3, a branch path 57 is connected to the supply path 45 as shown in FIG. The branch path 57 is not connected to the first tank 43, but is connected to the processing agent inlet 28 of the exhaust gas path 13. The branch path 57 is provided with a supply port 58 for supplying the treatment agent to the branch path 57. The supply port 58 is connected to the third tank 55. The third tank 55 can store the processing agent and can supply the processing agent to the branch path 57 from the supply port 58. Specifically, the third tank 55 has a supply device such as a table feeder, and the processing agent can be supplied to the branch path 57 by the supply device.

  The supply path 45 and the branch path 57 are provided with opening / closing sections 59 and 60, respectively. By opening and closing the supply passage 45 and the branch passage 57 by the opening / closing sections 59 and 60, it is possible to select a route of the air flow generated from the blower 42.

  For example, when a sufficient amount of mercury adsorbent is stored in the first tank 43, the opening / closing part 59 is closed and the opening / closing part 60 is opened, and the mercury adsorbent is supplied from the second tank 44 via the branch 57. You may make it throw in into the waste gas path 13. FIG. When it is desired to add the processing agent, the processing agent may be supplied from the third tank 55 via the branch path 57. The treating agent supplied to the branch path 57 is put into the exhaust gas path 13 together with the air from the blower 42. When the treatment agent is introduced into the exhaust gas path 13 from the introduction port 28, fly ash containing a reaction product of SOx or HCl and the treatment agent is generated, and the generated fly ash is generated in the bag filter 14 (see FIG. 1). Collected by. The charging of the mercury adsorbent from the second tank 44 via the branch path 57 and the charging of the processing agent via the branch path 57 from the third tank 55 may be performed simultaneously or separately. May be.

  When the opening / closing part 59 is opened and the opening / closing part 60 is closed, the medicine feeding device 41c according to the third embodiment functions substantially the same as the medicine feeding device of the first embodiment. Moreover, both the opening / closing part 59 and the opening / closing part 60 may be opened. In this case, it is possible to feed the mercury adsorbent into the exhaust gas path 13 from the second tank 44 via the branch path 57 while replenishing the mercury adsorbent from the second tank 44 to the first tank 43, or At the same time, it is possible to feed the treatment agent from the third tank 55 to the exhaust gas passage 13 via the branch passage 57.

  According to the medicine injection device 41c according to the present embodiment, as in the second embodiment, the equipment can be downsized and the treatment agent can be efficiently input using a blower. In addition to this, in the drug injection device 41c according to the present embodiment, it becomes possible to input the mercury adsorbent into the exhaust gas path 13 from the second tank 44 via the branch path 57 without passing through the first tank 43, For this reason, it is possible to diversify the method of controlling mercury.

DESCRIPTION OF SYMBOLS 11 Incinerator 13 Exhaust gas path 14 Bag filter 15 Chimney 16 Induction blower 31 Mercury detection apparatus 34 Control part 41a, 41b, 41c Drug injection apparatus 42 Blower 43 1st tank 44 2nd tank 45 Supply path 46 1st input path 47 2nd Feeding path 48 Opening / closing part 55 Third tank 57 Branching path

Claims (7)

A chemical charging device capable of charging a mercury adsorbent that adsorbs mercury contained in combustion exhaust gas into an exhaust gas path,
A blower for blowing air containing the mercury adsorbent;
A first tank capable of storing a predetermined amount of mercury adsorbent;
A supply path for supplying air blown from the blower to the first tank;
A first charging path for charging the mercury adsorbent stored in the first tank into the exhaust gas path;
An opening / closing part capable of opening and closing the first charging path,
The first tank is a cyclone type dust collector configured to store therein a mercury adsorbent supplied together with air introduced from the blower through a supply path,
The chemical adsorbing device, wherein the mercury adsorbent stored in the first tank is input to the exhaust gas path through the first input path when the opening / closing part is opened. The inside of the first tank and the exhaust gas path are connected, and a predetermined amount of mercury adsorbent discharged together with air from the inside of the first tank without being stored in the first tank is supplied to the exhaust gas path. The medicine input device according to claim 1, further comprising a second input path for input. And a second tank capable of storing the mercury adsorbent and capable of supplying the mercury adsorbent to a position downstream of the blower in the supply path and upstream of the first tank. The medicine injection device according to claim 1 or 2. A branch path connecting the supply path and the exhaust gas path;
The medicine injection device according to claim 3, further comprising: a third tank capable of storing a treatment agent for treating a substance other than mercury and capable of feeding the treatment agent into the branch path. The medicine injection device according to any one of claims 1 to 4,
A combustion exhaust gas treatment facility comprising: a filter that is provided downstream of the chemical injection device in the exhaust gas path and that collects fly ash contained in the combustion exhaust gas. A mercury detector capable of detecting the concentration of mercury contained in combustion exhaust gas;
A control unit that is connected to the opening / closing part of the medicine injection device and the mercury detection device, and is configured to open the opening / closing unit when the concentration of mercury detected by the mercury detection device exceeds a predetermined concentration. The treatment facility for combustion exhaust gas according to claim 5, further comprising: The facility for treating combustion exhaust gas according to claim 5 or 6, wherein the first tank of the chemical injection device is disposed at a position higher than the exhaust gas path from the ground.

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