KR101242204B1 - Complex disposal device for exhaust gas - Google Patents

Abstract

The present invention relates to a combined exhaust gas treatment apparatus. It comprises a powdered activated carbon supply unit for supplying powdered activated carbon to the combustion gas discharged from the combustion gas discharge source; A semi-dry reaction unit which receives the combustion gas and injects an alkaline absorbent liquid into the combustion gas to change an acidic substance in the combustion gas into an alkaline substance; An upper casing which receives a bag filter for filtering the gas passing through the semi-dry reaction part and opens to the bottom; A lower casing connected to the lower end of the upper casing; It is provided on the lower end of the lower casing, characterized in that it comprises a discharge device for receiving the reaction product dropped in the semi-dry reaction unit.
Since the semi-dry reaction unit and the bag filter treatment unit are integrated, the apparatus for compacting the exhaust gas of the present invention made as described above has a compact structure, so that the installation area is reduced, the operation and management are easy, and the discharge moves to the semi-dry reaction unit. Activated carbon is applied to the gas, but the turbulence of the exhaust gas is maximized to maximize the contact between the emitted gas and the activated carbon, so that the treatment efficiency is good, and the tank has a low specific gravity and easily receives industrial wastes such as fly ash floating in the gas. This allows for effective disposal of waste.

Description

Complex disposal device for exhaust gas

The present invention relates to a combined exhaust gas treatment apparatus.

Among the various pollutants in the exhaust gases generated during the combustion of materials in large-scale incineration plants, boilers or steel mills, acidic components such as hydrogen chloride (HCl), sulfur oxides (SOx), or hydrogen fluoride (HF) are very harmful to the human body. Of course, it is removed through various methods as a cause of air pollution.

As a method for removing acidic components in the exhaust gas, the exhaust gas is led to a semi-dry reaction apparatus, and an alkaline solution as an absorbent liquid to the exhaust gas passing through the reaction apparatus (for example, caustic soda, slaked lime, Ca (OH) ₂ ) Alternatively, the slurry may be sprayed to bring the hot exhaust gas into contact with the alkaline substance, thereby absorbing and neutralizing the acidic substance in the gas with the alkaline substance.

The alkaline solution is in particulate form and is in contact with the gas in the reaction apparatus and undergoes a reaction process of absorbing the acidic substance in the gas. The removal efficiency of the acidic material depends on the contact time and the contact area between the acidic material and the alkaline solution and the pH of the alkaline solution.

On the other hand, the exhaust gas is also mixed with contaminants such as heavy metal, fly ash, dioxin or dust. Among the various devices for filtering the contaminants, the bag filter has a good filtering effect and a simple structure, and thus is widely used.

In addition, activated carbon may be used as a purification device for removing contaminants mixed in the exhaust gas. The activated carbon is disposed in a passage through which the exhaust gas passes and has a function of adsorbing and removing nitrogen oxides and dioxins in the exhaust gas.

By the way, the various exhaust gas treatment apparatus described above has an efficient gas treatment capability in itself, but has a structure in which the exhaust gases are sequentially passed through in order to be installed separately, for example, in series. It occupies a large and large occupied area, and requires a large number of manpower for operation and management.

The present invention has been made to solve the above problems, and since the semi-dry reaction unit and the bag filter processing unit are integrated, the apparatus is compact, so that the operation and management are easier, and the activated carbon is added to the exhaust gas that is moved to the semi-dry reaction unit, but discharged. The gas flow is turbulent to maximize the contact between the discharged gas and activated carbon, and the treatment efficiency is good, and the tank has a specific gravity and a water tank that accepts industrial wastes such as fly ash that floats easily in the gas. An object is to provide a combined exhaust gas treatment device.

The exhaust gas composite processing apparatus of the present invention for achieving the above object, the powder activated carbon to supply powder activated carbon to the combustion gas duct passing through the combustion gas discharged from the combustion gas discharge source to enable the powder activated carbon to remove dioxin in the combustion gas A supply unit; The combustion gas that has passed through the combustion gas duct is received therein and guided downward, and the alkaline absorbing liquid is injected into the combustion gas to change the acidic substance in the combustion gas into an alkaline substance. A semi-dry reaction part including a cylindrical reaction tank which is received inside and is opened downward, and a plurality of nozzles disposed above the reaction tank and spraying the absorbent liquid into the reaction tank; A cylindrical casing disposed to surround the reaction tank and having an upper portion closed and an open bottom thereof, and a bag filter installation space which receives a bag filter and is opened downwardly between the reaction tank and an upper portion of the bag filter installation space. Located in a space separated from the bag filter installation space by the diaphragm and receiving the gas passing through the bag filter, and a vertical passage separated from the bag filter installation space and the sealed space and in communication with the sealed space and open to the bottom An upper casing having; A lower casing connected to the lower end of the upper casing and narrowed in the form of a funnel; A duct casing disposed at a periphery of the lower casing and communicating with the vertical passage and passing through a gas discharged through the vertical passage to discharge to the outside; It is provided on the lower end of the lower casing, characterized in that it comprises a discharge device for receiving the reaction product dropped in the semi-dry reaction unit.

In addition, the bag filter installation space is arranged so that a plurality of spaced apart from each other based on the center axis of the reaction tank, the vertical passage is characterized in that the space located between the bag filter installation space.

In addition, the closed space is a space disposed above the bag filter installation space and the vertical passage, and has a communication hole that can be opened and closed by a shutter device between the vertical passage and the vertical passage.

In addition, the shutter device; And an actuator for raising and lowering the upper portion of the communication hole and an actuator for raising and lowering the shutter.

In addition, an upper end portion of the bag filter is supported by the diaphragm, and a pulse air supply pipe for discharging the pulsing air into the bag filter is disposed inside the sealed space to exhaust particulate matter collected in the bag filter. The outside of the upper casing is operated when the communication hole is blocked, characterized in that the air supply for supplying a pulse air to the pulse air supply pipe is characterized in that it is provided.

In addition, the pulse air supply pipe is a pipe extending horizontally in the closed space, characterized in that the lower portion having a plurality of nozzles for injecting the pulsing air toward the bag filter.

In addition, the discharge device; A hopper fixed to the lower casing and passing the reaction product downward, a door device installed in the hopper to open and close a passage through which the reaction product passes, and being provided at a lower portion of the hopper so as to be lifted and lowered. It includes a lower end portion in the inner region, and a water tank for receiving the water of the water level higher than the lower end portion of the hopper, and lifting means for lifting the water tank.

In addition, the lower portion of the tank, it characterized in that a plurality of wheels are provided to be carried out to the tank in a state separated from the hopper.

Since the semi-dry reaction unit and the bag filter treatment unit are integrated, the apparatus for compacting the exhaust gas of the present invention made as described above has a compact structure, so that the installation area is reduced, the operation and management are easy, and the discharge moves to the semi-dry reaction unit. Activated carbon is applied to the gas, but the turbulence of the exhaust gas is maximized to maximize the contact between the exhaust gas and the activated carbon, so that the pretreatment efficiency is good, and the specific gravity is low and the tank that effectively receives industrial wastes such as fly ash that floats easily in the gas Efficient disposal of waste is possible.

1 is a view showing the overall configuration of the exhaust gas composite treatment apparatus according to an embodiment of the present invention.
2 is a view showing in more detail the composite processing unit shown in FIG.
3 is a cross-sectional view taken along the line III-III of FIG. 2.
4 is a view showing the state of the air pulsing unit in the composite processing unit shown in FIG.
5 is a view illustrating the air pulsing unit in more detail.
FIG. 6 is a side cross-sectional view showing a portion of the composite processing unit shown in FIG.
7 is a configuration diagram showing a shutter device used with the pulse air supply unit.
8 is a view separately illustrating a lower portion of the composite processing unit shown in FIG. 2.
9 to 11 are views for explaining the structure and operation of the discharge device is applied to the composite processing unit.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the overall configuration of the exhaust gas composite treatment apparatus according to an embodiment of the present invention.

As shown, the exhaust gas composite processing apparatus according to the present embodiment includes a powder activated carbon supply unit 15 for supplying powdered activated carbon to the combustion gas duct 13 through which the combustion gas discharged from the combustion gas discharge source 11 passes. And a complex processing unit 21 which receives the combustion gas that has passed through the combustion gas duct 13 therein, neutralizes acidic components in the combustion gas, and filters various pollutants.

The combustion gas discharge source 11 is a facility for discharging a large amount of harmful gas, such as a boiler or an incinerator. The pollutant gas contains acidic components such as hydrogen chloride (HCl), sulfur oxides (SOx), or hydrogen fluoride (HF) as well as pollutants such as dioxins, heavy metals, and fine dust.

The noxious gas discharged from the combustion gas discharge source 11 moves to the composite processing unit 21 through the combustion gas duct 13, and after being processed in the composite processing unit, passes through the processing gas duct 91 and passes through the chimney 93. Emissions to the atmosphere.

Powdered activated carbon is applied to the combustion gas that moves to the composite processing unit 21 through the combustion gas duct 13. The powder activated carbon moves with the combustion gas in the combustion gas and removes dioxins or nitrogen oxides in the combustion gas.

The powdered activated carbon supply unit 15 for supplying the powdered activated carbon to the combustion gas includes a hopper 15a for storing the powdered activated carbon and sending down the set amount of the powdered activated carbon to the bottom, and the powdered activated carbon supplied from the hopper 15a. The blower 15b sent to the combustion gas duct 13 through the activated carbon supply pipe 15c is included. The activated carbon supply pipe 15c communicates with the combustion gas duct 13 and ejects the powdered activated carbon into the flow of combustion gas.

In particular, the combustion gas duct 13 is provided with a plurality of turbulent flow guides 17. The turbulence induction part 17 serves to guide the flow of combustion gas flowing in the combustion gas duct 13 into the flow of turbulence. By providing the turbulence induction part 17 in the combustion gas duct 13 as described above, the mixing of the powdered activated carbon with the exhaust gas proceeds very actively, thereby increasing the removal efficiency of the nitrogen oxide and dioxins.

On the other hand, the composite processing unit 21 includes a semi-dry reaction unit 23 for neutralizing the acidic components in the exhaust gas in an alkaline manner, and a filtration processing unit 37 for filtering dust and heavy metals in the exhaust gas. The complex processing unit 21 will be described in detail with reference to FIG. 2.

Reference numeral 19 denotes a treatment liquid tank. The treatment solution is an alkaline solution that neutralizes the acidic component by reacting with an acidic component in the exhaust gas, and a slurry caustic soda, slaked lime, and Ca (OH) ₂ may be used. The treatment liquid in the treatment liquid tank 19 is supplied to the nozzle 25 through the pipeline 19a and then injected into the reaction tank (27 in FIG. 2) through the nozzle 25. The treatment liquid injected through the nozzle 25 contacts the reaction gas flowing through the combustion gas duct 13 into the reaction tank 27 to neutralize the acidic components in the reaction gas.

Figure 2 shows in more detail the composite processing unit shown in FIG.

As shown, the composite processing unit 21 in the composite processing apparatus according to the present embodiment receives the exhaust gas passing through the combustion gas duct 13 therein and has a plurality of nozzles 25 at its upper end. A tank 27, an upper casing 31 which covers a substantial portion of the reaction tank 27, a filtration unit 37 disposed between the upper casing 31 and the reaction tank 27, and the upper casing. A lower casing 39 which is connected to the lower end of the lower part 31 and takes the form of a funnel and guides the reaction product after being processed in the reaction tank 27, and a hopper provided at the lower end of the lower casing 39. 41, a door device 44 installed at the hopper 41 to open and close a passage provided by the hopper, and a reaction product discharge device 43 detachably installed at the lower end of the hopper 41. .

The reaction tank 27 and the nozzle 25 form a semi-dry reaction unit 23 for neutralizing acidic components in the exhaust gas. The reaction tank 27 takes the form of a cylinder opened downward as shown in FIG. 5 as a space where the neutralization reaction takes place.

In addition, the upper casing 31 is a cylindrical case surrounding the reaction tank 27, the upper end of which is blocked by the upper plate 31a, and the lower end is opened to the lower side like the reaction tank 27. In particular, the wall surface and the upper plate 31a of the upper casing 31 are made of two layers of iron plates, and the insulating material 32 is sandwiched therebetween. The insulation 32 serves to insulate the heat inside the upper and lower casings 31 and 39 as much as possible.

 In the space between the outer circumferential surface of the reaction tank 27 and the inner circumferential surface of the upper casing 31, a bag filter installation space 37a, a sealed space 35, and a vertical passage 49 are located. The bag filter installation space 37a is a space in which a bag filter as the filtration unit 37 is disposed.

In addition, the sealed space 35 is separated from the bag filter installation space 37a through the diaphragm 36, and is separated from the vertical passage (49 in FIG. 5) by the shutter (51d in FIG. 6) to be described later. .

The bag filter 33 is a pipe-like filtering member vertically extending, and has a venturi 33a at an upper end thereof, and the venturi 33a is supported by a diaphragm 36. The bag filter 33 passes a gas flowing upwardly to the bag filter installation space 37a after passing through the reaction tank 27 as shown in FIG. 5, and removes fine dust or heavy metal or fly ash from the gas. To filter.

The gas passing through the bag filter 33 enters the sealed space 35 through the venturi 33a. The gas introduced into the closed space 35 is moved along the closed space 35 in the circumferential direction of the reaction tank 27 and treated with the vertical passage 49 through the open communication hole (49a in FIG. 6). The gas duct 91 moves to the chimney 93.

The communication hole 49a is normally open and, for example, when a pulse air is supplied to the bag filter to clean the bag filter, the communication hole 49a is blocked by the shutter device to prevent pressure loss in the closed space 35. This will be described later.

The lower casing 39, which is connected to the lower portion of the upper casing 31, is integrally formed with the upper casing 31 and supported by the frame 45. Naturally, the structure of the frame 45 can be designed in various ways. In addition, by making the frame 45 higher, the upper casing 31 may be supported together.

The duct casing 40 provided at the periphery of the lower casing 39 is connected to the vertical passage 49 provided in the upper casing 31. Therefore, the gas flowing downward through the vertical passage 49 may exit the lower casing 39 and move to the duct casing 40.

In addition, a process gas duct 91 is fixed to the duct casing 40. The processing gas duct 91 is a passage for sending the processing gas exiting the composite processing unit 21 to the chimney 93.

On the other hand, the hopper 41 further concentrates the reaction product driven to the center by the lower casing 39 and sends it to the discharge device 43 disposed below the center. In particular, the hopper 41 is provided with a door device 44. The door device 44 is normally sealed to maintain the pressure inside the upper and lower casings 31 and 39, and is opened when the composite processing unit 21 is not operated, for example, to lower the reaction product to the lower discharge device 43. . The door device 44 and the discharge device 43 will be described with reference to FIGS. 9 to 11.

3 is a cross-sectional view taken along the line III-III of FIG. 2.

As shown, a bag filter installation space 37a and a vertical passage 49 are provided between the reaction tank 27 and the upper casing 31. The bag filter installation space 37a and the vertical passage 49 form a set one by one and are partitioned by a partition 50. That is, one bag filter installation space 37a and one vertical passage 49 form a jaw and are blocked from the outside by the partition 50. The sealed space 35 is located at the upper end of the bag filter installation space 37a and the vertical passage 49.

In addition, a plurality of bag filters 33 are filled in the bag filter installation space 37a as the filtration treatment unit 37. The bag filters 33 are arranged in a row in the circumferential direction with six arranged in a row in the radial direction of the upper casing 31.

4 is a plan view of the composite processing unit 21 for explaining the state of the pulse air supply unit in the composite processing unit shown in FIG. 2, and FIG. 5 is a view showing the pulse air supply unit in more detail.

As shown in the drawing, four shutter devices 51 and a pulse air supply unit 29 are arranged on the upper plate 31a of the upper casing 31. The shutter device 51 and the pulse air supply unit 29 form one set and are positioned vertically above the vertical passage 49.

In particular, six pulse air supply pipes 29a are connected to each pulse air supply unit 29. The pulse air supply pipe 29a is a pipe extending horizontally in the sealed space 35 after entering the sealed space 35 with its one end connected to the pulse air supply 29.

The pulse air supply pipe 29a extending in the sealed space 35 is bent in parallel with the circumferential direction of the upper casing 31 and has a plurality of nozzles 29d thereunder. The nozzles 29d are disposed on the top of each of the bag filters 33 vertically, and spray the air pressurized by the pulse air supply pipe 29a to the bag filter 33 to contaminate the various kinds of contamination adhered to the bag filter 33. The material is removed from the bag filter 33.

The pulse air supply unit 29 is disposed between the air tank (29b) for storing the compressed air supplied from the outside, and between the air tank (29b) and the pulse air supply pipe (29a), by a separate control signal It is composed of a solenoid valve 29e that is opened and sends air from the air tank 29b to the pulse air supply pipe 29a.

The pulse air supply part 29 operates with the communication hole 49a closed.

6 is a block diagram showing the shutter device 51 used with the pulse air supply unit 29.

The shutter device 51 is for opening and closing the communication hole 49a. The shutter device 51 is a vertically fixed actuator 51a, and is positioned at the vertical portion of the communication hole 49a and lifted up and down by the actuator 51a. It consists of 51d. The cylinder 51b of the actuator 51a is fixed to the upper plate 31a, and the operation rod 51c is coupled to the shutter 51d in the sealed space 35. By the operation of the actuator 51a, the shutter 51d moves up and down to open and close the communication hole 49a.

The shutter 51d stands by in a normally raised state. Therefore, the air flowing into the closed space 35 through the filtration treatment unit 37 may exit the vertical passage 49 through the open communication hole 49a.

The shutter 51d is closed when the pulsing air is injected into the bag filter 33 to completely seal the sealed space 35 so that pressure does not leak.

FIG. 7 is a side cross-sectional view showing a portion of the composite processing unit shown in FIG.

Referring to the drawings, the upper casing 31 and the lower casing 39 are integrally connected to provide an interior space, and the reaction tank 27 is disposed inside the upper casing 31. Able to know. The reaction tank 27 and the upper casing 31 are open to the bottom. Therefore, the gas entering downward into the reaction tank 27 through the combustion gas duct 13 may flow downward and move to the bag filter installation space 37a.

While the gas flows downward in the reaction tank 27, caustic soda, slaked lime and Ca (OH) ₂ are injected from the nozzle 25 as an absorbent liquid. The alkaline substance chemically reacts with the acidic component in the combustion gas to neutralize the acidic component. The reaction product generated by the chemical reaction falls down and is guided to the lower casing 39 and moves to the hopper 41.

Reference numeral 42 is a vibration generator. The vibration generator 42 applies vibration to the lower casing 39 so that the reaction product is not fixed to the lower casing 39. By vibrating the lower casing 39 slightly by the vibration generator 42, the reaction product slides downwards without sticking to the inner wall surface of the lower casing 39.

In addition, the door device 44 is sealed while the chemical reaction is in progress so that external gas does not leak to the outside.

In addition, a closed space 35 isolated by the diaphragm 36 is located at the upper end of the bag filter installation space 37a. The pulsed air supply pipe 29a is disposed in the sealed space 35.

8 is a view separately illustrating a lower portion of the composite processing unit shown in FIG. 2.

As shown, the duct casing 40 described above is provided at the periphery of the lower casing 39. The duct casing 40 receives the gas passed downward through the vertical passage 49 into the processing gas duct 91 and passes the gas through the vertical passage 49. A separate filter may be installed inside the duct casing 40 to purify the gas once again.

9 to 11 are views for explaining the structure and operation of the discharge device is applied to the composite processing unit, Figure 9 is a view showing the discharge device in the state of the composite processing of the gas, Figure 10 Is a cross-sectional view showing a state inside the water tank 43c of FIG. 11 is a view showing a state in which the water tank 43c is lowered.

Referring to the drawings, it can be seen that the door device 44 is provided on the lower side of the hopper 41. The door device 44 opens and closes a vertical passage provided by the hopper 44, and is closed during the complex processing of gas to block the gas and the reaction product from leaking. The door device 44 is opened when no gas is processed, and the reaction device accumulated in the upper part of the door 44b is sent down to the lower tank 43c.

The door device 44 includes an actuator 44e composed of a cylinder 44c and an actuating rod 44d, and a door 44b moving horizontally by the operation of the actuator 44e. The door 44b blocks the vertical passage provided by the hopper 41 and has a roller 44k approximately in the middle. The roller 44k serves to support the door 44b in the direction of arrow F of FIG. 11 by raising the door 44b to a triangular base 43m to be described later when entering the inside of the hopper 41.

In addition, the side of the hopper 41 is provided with a door casing (44a) for receiving the door (44b). As a result, the door 44b reciprocates the inner space of the door casing 44a and the hopper 41.

A door seating groove 43k is provided on the inner wall surface of the hopper 41. The door seating groove 43k is a groove into which the edge of the door 44b is completely inserted into the hopper 41 and is in close contact with the seal 44f provided on the upper surface of the door 44b.

The door seating groove 43k is provided with a tripod 43m. The tripod 43m is a projection of a right triangle shape that provides an inclined surface on which the roller 44k can rise. The edge of the door 44b is inserted into the door seating groove 43k at the moment when the roller 44k rises to the top of the tripod 43m. Eventually, when the actuator 44e is operated to enter the door 44b into the hopper 41, the door 44b is lifted in the direction of arrow F while being seated in the door seating groove 43k, thereby completely filling the upper space of the hopper. Seal it.

On the other hand, the lower portion of the door seating groove 43k is provided with a coupling plate 43b. The coupling plate 43b is a flat plate having a predetermined thickness and has a sealing seal 43n on the bottom of the edge portion thereof. The coupling plate 43b is in contact with the upper surface of the water tank 43c (in an elevated state) to seal the water tank. The combined 43b serves as a lid covering the water tank.

The water tank 43c is a container for accommodating water therein. As shown in FIG. 10, the water level of the water accommodated in the said water tank 43c is higher than the height of the lower end part of the hopper 41 when raising the water tank 43c and engaging with the coupling plate 43b. Therefore, as shown in FIG. 9, industrial waste products, such as fly ash, which floats down easily in the air due to low specific gravity or a low specific gravity, can be easily collected in the tank. have. Reference numeral 43e denotes a water supply pipe for supplying water into the water tank 43c.

In addition, the lower portion of the tank is provided with a hydraulic actuator 59 that is the lifting means of the tank. The hydraulic actuator 59 is vertically arranged so that the upper end of the actuating rod 59a is linked to the center of the bottom surface of the water tank 43c. The lifting and lowering motion of the water tank 43c is performed by the operation of the hydraulic actuator 59. When the water tank 43c is raised, the edge portion of the water tank 43c is fitted to the coupling plate 43b to seal the inner space of the water tank 43c.

In addition, a plurality of wheels 43f are provided on the bottom surface of the water tank 43c, and a rail 55 is laid on the vertical lower portion of the wheels 43f. The rail 55 horizontally supports the water tank 43c through the wheel 43f when the water tank 43c is put down. The wheel 43f guides the rolling motion of the wheel.

Therefore, when the reaction product or trapping material is collected to some extent in the water tank 43c, the used water tank can be lowered, seated on the rail 55, moved along the rail 55, and easily taken out to the outside. The other excess water tank is moved to the vertical bottom of the hopper 41 in the state where the water tank 43c is taken out, and the hydraulic actuator 59 is made to raise the water tank 43c to complete the treatment of the reaction product.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

11: Combustion gas discharge source 13: Combustion gas duct 15: Powder activated carbon supply unit
15a: Hopper 15b: Blower 15c: Activated carbon supply pipe
17: turbulence induction part 19: treatment liquid tank 19a: pipeline
21: complex treatment unit 23: semi-dry reaction unit 25: nozzle
27: reaction tank 29: pulse air supply part 29a: pulse air supply pipe
29b: Air tank 29d: Nozzle 29e: Solenoid valve
31: upper casing 31a: top 32: insulation
33: bag filter 33a: Venturi 35: airtight space
36: plate 37: filtration unit 37a: bag filter installation space
39: lower casing 40: duct casing 41: hopper
42: vibration generator 43: discharge device 43b: coupling plate
43c: Water tank 43e: Water pipe 43f: Wheel
43k: Door seating groove 43m: Tripod base 43n: Airtight seal
44: door device 44a: door casing 44b: door
44c: Cylinder 44d: Operating rod 44e: Actuator
44f: Seal 44k: Roller 45: Frame
49: vertical passage 49a: communication hole 50: partition
51: shutter device 51a: actuator 51b: cylinder
51c: Operating rod 51d: Shutter 55: Rail
59: hydraulic actuator 59a: working rod 91: process gas duct
93: chimney

Claims (8)

A powder activated carbon supply unit for supplying powder activated carbon to a combustion gas duct through which combustion gas discharged from a combustion gas discharge source passes, thereby causing the powder activated carbon to remove dioxins in the combustion gas;
The combustion gas that has passed through the combustion gas duct is received therein and guided downward, and the alkaline absorbing liquid is injected into the combustion gas to change the acidic substance in the combustion gas into an alkaline substance, and the combustion gas is changed through the combustion gas duct. A semi-dry reaction part including a cylindrical reaction tank which is received inside and is opened downward, and a plurality of nozzles disposed above the reaction tank and spraying the absorbent liquid into the reaction tank;
A cylindrical casing disposed to surround the reaction tank and having an upper portion closed and an open bottom thereof, and a bag filter installation space which receives a bag filter and is opened downwardly between the reaction tank and an upper portion of the bag filter installation space. Located in a space separated from the bag filter installation space by the diaphragm and receiving the gas passing through the bag filter, and a vertical passage separated from the bag filter installation space and the sealed space and in communication with the sealed space and open to the bottom An upper casing having;
A lower casing connected to the lower end of the upper casing and narrowed in the form of a funnel;
A duct casing disposed at a periphery of the lower casing and communicating with the vertical passage and passing through a gas discharged through the vertical passage to discharge to the outside;
It is provided in the lower end of the lower casing, exhaust gas composite processing apparatus comprising a discharge device for receiving the reaction product dropped from the semi-dry reaction unit,
The bag filter installation space is arranged to be spaced apart from each other based on the center axis of the reaction tank, the vertical passage is a space located between the bag filter installation space,
An upper end of the bag filter is supported by the diaphragm, and a pulse air supply pipe for discharging the pulsing air into the bag filter is disposed inside the sealed space to clean the bag filter. And an air supply unit which operates when the communication hole is blocked and supplies pulse air to the pulse air supply pipe. The method of claim 1,
The closed space is a space disposed above the bag filter installation space and the vertical passage, and has a communication hole that can be opened and closed by the shutter device between the vertical passage and the exhaust gas composite processing apparatus. The method of claim 2,
The shutter device;
And an actuator for raising and lowering the shutter to be provided at an upper portion of the communication hole, and an actuator for raising and lowering the shutter. The method of claim 1,
The pulse air supply pipe is a pipe extending horizontally in the closed space, the lower portion has a composite exhaust gas treatment device characterized in that it has a plurality of nozzles for injecting the pulsing air toward the bag filter. The method of claim 1,
The discharge device;
A hopper fixed to the lower casing and passing the reaction product downward;
A door device installed in the hopper to open and close a passage through which the reaction product passes;
A water tank provided at a lower portion of the hopper, including a lower end portion of the hopper in its inner region in a raised state and receiving water at a level higher than the lower end portion of the hopper;
Emission gas composite processing apparatus comprising a lifting means for lifting the tank. The method of claim 5,
The lower portion of the water tank, the exhaust gas composite processing apparatus, characterized in that a plurality of wheels are provided to carry out the water tank separated from the hopper to the outside. delete delete

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