CN113164865A - Exhaust gas purification device and exhaust gas harmful removal device using same - Google Patents

Exhaust gas purification device and exhaust gas harmful removal device using same Download PDF

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Publication number
CN113164865A
CN113164865A CN201980076762.0A CN201980076762A CN113164865A CN 113164865 A CN113164865 A CN 113164865A CN 201980076762 A CN201980076762 A CN 201980076762A CN 113164865 A CN113164865 A CN 113164865A
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CN
China
Prior art keywords
exhaust gas
impeller
cleaning liquid
dust
housing
Prior art date
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Pending
Application number
CN201980076762.0A
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Chinese (zh)
Inventor
今村启志
原口秀夫
佐藤康弘
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Kanken Techno Co Ltd
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Kanken Techno Co Ltd
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Publication date
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Publication of CN113164865A publication Critical patent/CN113164865A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/04—Arrangements of recuperators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The invention provides an exhaust gas purification device capable of improving the removal rate of fine dust and the like in exhaust gas. That is, the exhaust gas purification device of the present invention includes: a housing (12) having an exhaust gas inlet (12a) and an exhaust gas outlet (12 b); an impeller (14) which is disposed in the housing (12) and supported by a rotating shaft (18); and a nozzle (16) that discharges a cleaning liquid (20) into the impeller (14), wherein the exhaust gas purification apparatus rotates the impeller (14) to suck in the exhaust gas (E) including the dust through the exhaust gas suction port (12a), and wherein the cleaning liquid (20) discharged from the nozzle (16) captures the dust in the exhaust gas (E) and removes the dust included in the exhaust gas (E), wherein the rotation shaft (18) is disposed in a vertical direction, the impeller (14) rotates in a horizontal direction, and the exhaust gas suction port (12a) is opened in a bottom surface of the casing (12).

Description

Exhaust gas purification device and exhaust gas harmful removal device using same
Technical Field
The present invention relates to an exhaust gas purifying apparatus for efficiently removing fine dust and cleaning liquid soluble components (hereinafter, also simply referred to as "dust and the like") in exhaust gas, and an exhaust gas detoxifying apparatus using the same.
Background
In the past, there has been a fan scrubber described in patent document 1 (japanese patent application laid-open No. 2003-144826) described below. This conventional technique is configured as follows.
The fan washer includes: a housing having an exhaust gas inlet and an exhaust gas outlet; an impeller disposed in the housing and rotating; and a nozzle for spraying a cleaning liquid into the impeller. When the exhaust gas containing dust from the exhaust gas inlet is sucked into the center of the impeller, and the cleaning liquid is ejected from the nozzle, and the dust contained in the exhaust gas is captured by the particles of the cleaning liquid and the dust in the exhaust gas is removed, a collision plate is continuously arranged around substantially the entire periphery of the impeller in the casing, and the particles of the exhaust gas and the cleaning liquid flowing out from the impeller collide with each other.
According to the above-described conventional technique, since the collision plate, on which the particles of the exhaust gas and the cleaning liquid flowing out from the impeller collide, is disposed substantially over the entire circumference of the impeller in the housing, the particles of the exhaust gas and the cleaning liquid flowing out from the impeller collide with the collision plate, and turbulence is generated substantially over the entire circumference of the impeller. The turbulence promotes mixing of the exhaust gas and the fine particles of the cleaning liquid, and generation of fine droplets scattered when the large droplets of the cleaning liquid collide with the collision plate, thereby improving the removal rate of fine dust and the like in the exhaust gas.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2003-144826
Disclosure of Invention
Problems to be solved by the invention
The above-described prior art has the following problems.
Although the collision plate is disposed substantially over the entire periphery of the impeller in the casing, there is a problem that substantially the same effect as that obtained when the collision plate is disposed can be obtained by the collision of the fine particles of the exhaust gas and the cleaning liquid flowing out from the impeller with the inner wall of the casing, and the efficiency of removing the dust cannot be improved to a desired degree, even if the collision plate is not provided.
Further, in the case where such a fixed collision plate is provided in the housing, dust captured by the cleaning liquid gradually accumulates on the surface of the collision plate, and in the worst case, there is a problem that the apparatus has to be stopped and maintenance is performed regularly and frequently.
Further, since the entire amount of the exhaust gas flowing out of the impeller is discharged to the outside at once through the exhaust gas discharge port, there is a problem that the exhaust gas containing a large amount of dust is still discharged to the atmosphere even when another exhaust gas treatment means is not provided after the device.
Accordingly, a main object of the present invention is to provide an exhaust gas purifying apparatus capable of improving a removal rate of fine dust and the like in exhaust gas, and an exhaust gas detoxifying apparatus using such an exhaust gas purifying apparatus and having excellent efficiency of detoxifying exhaust gas.
To solve the problems
In order to achieve the above object, the present invention provides an exhaust gas purifying device 10 as shown in fig. 1 and 2.
That is, the exhaust gas purification device 10 includes: a housing 12 having an exhaust gas suction port 12a and an exhaust gas discharge port 12 b; an impeller 14 disposed in the casing 12 and supported by a rotary shaft 18; and a nozzle 16 for discharging a cleaning liquid 20 into the impeller 14, wherein the exhaust gas purifying apparatus 10 rotates the impeller 14 to suck an exhaust gas E containing dust and cleaning liquid soluble components through the exhaust gas suction port 12a, and the cleaning liquid 20 discharged from the nozzle 16 captures the dust and cleaning liquid soluble components in the exhaust gas E and removes the components contained in the exhaust gas E.
The rotation shaft 18 is disposed in the vertical direction, the impeller 14 rotates in the horizontal direction, and the exhaust gas suction port 12a is opened in the bottom surface of the casing 12.
The present invention, for example, has the following effects.
Since the rotation shaft 18 supporting the impeller 14 is disposed in the vertical direction and the impeller 14 rotates in the horizontal direction, the exhaust gas E and the cleaning liquid 20 flowing out of the impeller 14 scatter in the horizontal direction while coming into gas-liquid contact with each other, and collide with the inner wall of the casing 12. Then, the cleaning liquid 20 having collided with the wall surface of the inner wall and the dust captured by the same are repeatedly collided to gradually increase the particle diameter, and as a result, the cleaning liquid flows down along the inner wall by gravity. At the same time, the cleaning liquid soluble component is dissolved and accumulated in the cleaning liquid 20. Here, since the exhaust gas suction port 12a is opened in the bottom surface of the casing 12, most of the cleaning liquid 20 accumulated on the inner wall surface of the casing 12 and the dust and cleaning liquid soluble components captured thereby are discharged to the outside of the casing 12 through the exhaust gas suction port 12 a.
In the present invention, a demister 22 is preferably disposed on the side peripheral surface of the impeller 14.
In this case, gas-liquid contact between the exhaust gas E sucked by the impeller 14 and the cleaning liquid 20 can be further promoted, and the efficiency of capturing dust and cleaning liquid soluble components by the cleaning liquid 20 can be improved.
Further, by arranging the demister 22 on the side peripheral surface of the impeller 14, centrifugal force is always applied to the demister 22. Therefore, clogging of the demister 22 due to dust in the exhaust gas E can be effectively prevented.
In the present invention, it is preferable that a part of the exhaust gas E discharged from the exhaust gas discharge port 12b to the outside of the casing (12) is returned to the exhaust gas suction port 12a again.
In this case, a part of the exhaust gas E can repeatedly pass through the impeller 14, and the removal rate of the dust and the soluble component of the cleaning liquid in the exhaust gas E can be further improved.
The exhaust gas detoxifying device of the second aspect of the present invention is provided with a decomposition furnace for thermally decomposing the exhaust gas E and the exhaust gas purifying device 10 of the present invention, and is characterized in that the exhaust gas purifying device 10 is provided at least in a front stage of the decomposition furnace.
In the present invention, since the exhaust gas purification apparatus 10 having extremely high efficiency of removing the soluble components of the dust and the cleaning liquid is provided at least in the front stage of the decomposing furnace, even when the decomposing furnace is provided with a multi-tube heat exchanger or the like constituted by a plurality of pipes having small diameters, accumulation of the dust in such pipes can be effectively prevented, and as a result, the efficiency of removing the harmful components of the exhaust gas can be improved.
In addition, the present invention is preferably configured to be specific to the embodiments described below.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide an exhaust gas purifying device capable of improving the removal rate of fine dust and the like in exhaust gas, and an exhaust gas detoxifying device using such an exhaust gas purifying device and having excellent efficiency of detoxifying exhaust gas.
Drawings
Fig. 1 is an explanatory diagram showing an outline of an exhaust gas purifying apparatus according to an embodiment of the present invention.
Fig. 2 is a partially cut-away plan view of a top plate of an impeller according to an embodiment of the present invention.
Fig. 3 is a partially cut-away plan view of a top plate in an impeller according to another embodiment of the present invention.
Fig. 4 is an explanatory diagram showing an outline of an exhaust gas purifying apparatus according to another embodiment of the present invention.
Detailed Description
An embodiment of the present invention will be described below with reference to fig. 1 and 2.
Fig. 1 is a diagram schematically showing an exhaust gas purifying apparatus 10 according to an embodiment of the present invention. As shown in the drawing, the exhaust gas purifying apparatus 10 of the present embodiment is configured such that a casing 12 having an exhaust gas inlet 12a and an exhaust gas outlet 12b, an impeller 14 disposed in the casing 12 and supported by a rotating shaft 18, and a nozzle 16 for ejecting a cleaning liquid 20 into the impeller 14 are housed in an airtight and strong housing 24 made of metal such as stainless steel. The shape of the frame 24 is not particularly limited, and may be a quadrangular prism or a cylindrical shape. In the illustrated embodiment, the housing 24 is formed in a quadrangular prism shape, and the top plate 26 constituting the top surface thereof is provided with an exhaust gas inlet port 26a and an exhaust gas outlet port 26b which are diagonally spaced from each other. An inlet short pipe 28 connected to a pipe (not shown) communicating with an exhaust gas generation source is inserted into the exhaust gas inlet 26a, and an outlet double pipe 30 for discharging the treated exhaust gas E to the outside of the housing 24 is inserted into the exhaust gas outlet 26 b. The details of the outlet double pipe 30 will be described later.
An opening 26c is provided in the center of the top plate 26, and a motor 32 for rotating and driving the impeller 14 in a state where the rotary shaft 18 is inserted through the opening 26c is provided in the upper portion of the center of the top plate 26.
A short cylindrical pipe wall 34 serving as a side peripheral wall of the housing 12 is vertically provided at a central lower portion of the top plate 26. Therefore, in the present embodiment, the central portion of the top plate 26 of the frame 24 is used as the top plate of the housing 12. Further, at the lower end of the pipe wall 34, after an impeller 14 described later is accommodated in the pipe wall 34, an annular bottom plate 36 serving as an opening of the exhaust gas suction port 12a is attached to the center, thereby completing the casing 12. An exhaust gas outlet 12b communicating with the outlet double pipe 30 and discharging the exhaust gas E having passed through the impeller 14 from the casing 12 is provided through the casing 12 at a position close to the exhaust gas outlet 26b of the pipe wall 34 serving as the side peripheral wall of the casing 12.
Here, the outlet double pipe 30 communicating with the exhaust gas outlet 12b will be described, and the outlet double pipe 30 includes: a first short tubular pipe 30a inserted into the exhaust gas outlet 26b and communicating with the exhaust gas outlet 12b at its side circumferential surface; and a second pipe 30b, the upper portion of which is made of a pipe having the same diameter as the first pipe 30a, and the diameter of the lower portion of which is reduced via a connector 38, and the reduced diameter lower portion is inserted into the first pipe 30a from the upper side of the first pipe 30a to hermetically seal the upper end 40 of the first pipe 30 a. The lower end 42 of the second pipe 30b is disposed below the lower end of the exhaust gas outlet 12b and above the lower end 44 of the first pipe 30 a. Therefore, a part of the exhaust gas E discharged from the exhaust gas discharge port 12b flows into the second pipe body 30b from the lower end 42 of the second pipe body 30b (upstream), but the remaining part (the remaining part of the exhaust gas E and the cleaning liquid 20 passing through the exhaust gas discharge port 12b) flows down the first pipe body 30a under the influence of gravity and returns into the housing 24 from the lower end 44 thereof. The amount of the exhaust gas E that passes through the impeller 14 and is discharged from the exhaust gas discharge port 12b can be adjusted by appropriately setting the capacity of the housing 24, the rotational speed of the motor 32 that rotates the impeller 14, the length and the diameter of the first pipe 30a and/or the second pipe 30b, and the like.
The impeller 14 includes: a disk-shaped top plate 46; a vane plate 48 which is inclined at a predetermined angle with respect to the radial direction of the top plate 46 on the lower surface of the peripheral edge portion of the top plate 46 and is arranged at the outer peripheral portion of the top plate 46 at a predetermined interval; and an annular bottom plate 50 that connects lower end portions of the vane plates 48 (see fig. 2).
As shown in fig. 1, the impeller 14, in which the shaft hole 46a through which the rotating shaft 18 is inserted is formed in the center portion of the top plate 46, and the rotating shaft 18 is inserted through the shaft hole 46a, is fixed to the rotating shaft 18 by attaching a fixing member 52 from the distal end side of the rotating shaft 18.
In the impeller 14 of the present embodiment, an air-permeable wall member 54 made of a stainless steel punched metal plate or the like is provided over the entire circumference between the outer peripheral edge of the top plate 46 and the outer peripheral edge of the bottom plate 50, and the demister 22 is disposed inside.
Here, the demister 22 is a type of moisture separator formed in a mat shape by stacking several layers of, for example, metal wires, resin filaments, or the like in order to reduce pressure loss and increase a contact surface with a fluid. The type of mist eliminator 22 used in the present invention is not particularly limited, and mesh mist eliminators, wire mist eliminators, and the like can be used.
The nozzle 16 is for ejecting the cleaning liquid 20 into the impeller 14, and a head portion thereof is a spray nozzle disposed near a bottom portion of the impeller 14. The cleaning liquid 20 ejected from the nozzle 16 can be appropriately set according to the type of the exhaust gas E to be treated. In the present embodiment, a mode in which water (clean water) supplied from the outside of the housing 24 is used as the cleaning liquid 20 is exemplified.
In the exhaust gas purifying device 10 of the present embodiment, most of the cleaning liquid 20 discharged from the nozzle 16 is accompanied by SiO, for example2Such dust, e.g. chlorine (Cl)2) Such water-soluble components (cleaning liquid-soluble components) flow down inside the frame 24 and are accumulated in the bottom of the frame 24. Therefore, a drain line 56, a piping system 58 for adjusting the liquid level of the accumulated cleaning liquid 20, and the like are attached to the bottom of the housing 24. Here, by appropriately operating or adjusting the piping system 58 for adjusting the liquid level of the cleaning liquid 20 accumulated in the bottom of the frame body 24 and the amount of the cleaning liquid 20 (cleaning water) ejected from the nozzle 16, for example, even when a large amount of chlorine gas (Cl) contained in the exhaust gas E is caused to be contained in the exhaust gas E2) Absorbed by the washing liquid 20 and reduced to TLV (Threshold Limit Values: threshold value) or less, the chlorine concentration of the cleaning liquid 20 flowing down to the bottom of the frame 24 can be suppressed to an extremely low level, and as a result, the cleaning liquid 20 extracted from the bottom of the frame 24 and distributed as a waste liquid can be directly flowed to a drain without being subjected to drainage treatment.
Next, when the exhaust gas purifying device 10 of the present embodiment configured as described above is used, first, electric power is supplied to the motor 32 to operate the motor, and the cleaning liquid 20 is discharged from the nozzle 16. Then, the impeller 14 rotates at a high speed at a predetermined rotation speed (for example, about 3000 to 4000 rpm), thereby generating a negative pressure in the vicinity of the exhaust gas inlet 12a of the casing 12 and a positive pressure toward the exhaust gas outlet 12b in the vicinity of the exhaust gas outlet 12b, and generating an air flow in the casing 12.
Next, although not shown, an intake mechanism such as a fan provided on the downstream side in the exhaust gas flow direction of the exhaust gas outlet 26b is operated to start introduction of the exhaust gas E containing dust into the exhaust gas purification apparatus 10. Then, the exhaust gas E introduced into the housing 24 through the inlet short pipe 28 enters the casing 12 from the exhaust gas inlet 12a, which is a negative pressure, passes through the impeller 14 while contacting the cleaning liquid 20, which is fine particles, and collides with the pipe wall 34, which is a side peripheral wall of the casing 12.
Here, in the exhaust gas purifying apparatus 10 of the present embodiment, since the demister 22 is disposed on the side peripheral surface of the impeller 14, gas-liquid contact between the exhaust gas E sucked by the impeller 14 and the cleaning liquid 20 can be further promoted, and the dust trapping efficiency and the water-soluble gas absorption efficiency by the cleaning liquid 20 can be improved.
Next, the cleaning liquid 20 that collides with the wall surface of the pipe wall 34 (hereinafter also referred to as "inner wall surface") and the dust in the exhaust gas E captured by the cleaning liquid gradually increase in particle size by repeating the above-described collision, and as a result, the dust flows down along the inner wall surface by gravity. Most of the cleaning liquid 20 and the dust captured by the cleaning liquid accumulated on the inner wall surface of the casing 12 are discharged to the outside of the casing 12 through the exhaust gas suction port 12 a.
On the other hand, the exhaust gas E from which most of the cleaning liquid 20 and the dust have been removed is discharged from the exhaust gas outlet 12b to the outside of the casing 12.
Here, in the exhaust gas purifying device 10 of the present embodiment, since the double outlet pipe 30 is provided at the exhaust gas outlet 26b, a part of the exhaust gas E discharged from the exhaust gas outlet 12b to the outside of the housing 12 is returned to the exhaust gas inlet 12a again. Therefore, a part of the exhaust gas E can repeatedly pass through the impeller 14, and the removal rate of the dust in the exhaust gas E can be further improved. In fig. 1, the arrow indicating the flow of the exhaust gas E indicates that the arrow indicated by the solid line does not pass through the impeller 14 and indicates that the arrow indicated by the broken line passes through the impeller 14.
Further, since the lower end 42 of the second pipe body 30b of the outlet double pipe 30 is disposed below the lower end of the exhaust gas outlet 12b and above the lower end 44 of the first pipe body 30a, the discharge of the cleaning liquid 20 and the dust from the inside of the housing 24 can be reduced. However, when it is desired to further suppress the discharge of the cleaning liquid 20 and the dust from the inside of the frame 24, a demister or the like is preferably provided inside the second tube body 30b of the outlet double tube 30.
When the exhaust gas E subjected to the exhaust gas purification treatment by the exhaust gas purification apparatus 10 of the present embodiment is discharged through the semiconductor manufacturing process, it is preferable to constitute an exhaust gas destruction apparatus in combination with a decomposition furnace that thermally decomposes the exhaust gas E. As the heat source of the decomposition furnace, any heat source may be used as long as the temperature in the furnace can be raised to the thermal decomposition temperature of the exhaust gas E, and for example, an electric heater, a flame burner, a non-transition type or transition type plasma torch, or the like can be preferably used. Further, if the pyrolysis furnace is a high-efficiency type device provided with a multi-tube heat exchanger constituted by a plurality of pipes having small diameters, the synergistic effect of the two can be made more remarkable as follows by providing the exhaust gas purification device 10 of the present embodiment at least at the front stage (in other words, the upstream side) of the pyrolysis furnace. That is, in the exhaust gas purifying apparatus 10 of the present embodiment, 95% or more of the dust mainly having a particle size of about 0.1 μm to 60 μm in the exhaust gas E can be removed from the exhaust gas E, and therefore, the pipe clogging in the multi-pipe heat exchanger can be prevented, and the decomposition furnace can be continuously operated stably for a long period of time. As a result, the efficiency of removing the harmful substances in the exhaust gas E can be significantly improved.
In the above-described embodiment, the impeller 14 is configured to have the vane plates 48 inclined at a certain angle with respect to the radial direction of the top plate 46, but the axes of the vane plates 48 provided in the impeller 14 may be aligned in the radial direction as shown in fig. 3, for example.
In this case, although the suction force of the exhaust gas E generated when the impeller 14 is rotated at a high speed is weaker than that in the above-described embodiment, when the demister 22 is disposed on the side peripheral surface of the impeller 14, the residence time and the movement distance of the exhaust gas E and the cleaning liquid 20 in the demister 22 can be made longer. In this way, the exhaust gas E and the cleaning liquid 20 can be sufficiently brought into gas-liquid contact in the demister 22, and the efficiency of capturing dust and cleaning liquid soluble components by the cleaning liquid 20, particularly the efficiency of capturing cleaning liquid soluble components, can be significantly improved.
In the above-described embodiment, the outlet double-tube 30 inserted into the exhaust gas outlet 26b has a structure including the first short tubular body 30a communicating with the exhaust gas outlet 12b on the side peripheral surface and the second short tubular body 30b inserted from the upper side of the first tubular body 30a into the inside thereof and hermetically sealing the upper end 40 of the first tubular body 30a, but may be configured by, for example, as shown in fig. 4, the first short tubular body 30a communicating with the exhaust gas outlet 12b on the side peripheral surface and the second elbow-shaped tubular body 30b, the second tubular body 30b being disposed inside the first tubular body 30a, the upper end being directly connected to the exhaust gas outlet 12b, and the lower end 42 being disposed below the lower end of the exhaust gas outlet 12b and above the lower end 44 of the first tubular body 30 a.
In this case as well, a part of the exhaust gas E discharged from the exhaust gas discharge port 12b flows upward in the first pipe body 30a in the reverse direction immediately after coming out from the lower end 42 of the second pipe body 30b, but the remaining part (the remaining part of the exhaust gas E and the cleaning liquid 20 having passed through the exhaust gas discharge port 12b) flows through the first pipe body 30a and returns into the housing 24 from the lower end 44 thereof under the influence of gravity, as in the above-described embodiment.
In the above-described embodiment, the case where the fan (not shown) for transporting the exhaust gas E is provided on the downstream side in the exhaust gas flow direction from the exhaust gas outlet 26b of the exhaust gas purification apparatus 10 has been described, but the fan is provided as needed, and the installation location thereof is not limited to the above-described embodiment, and for example, the fan may be provided on the upstream side in the exhaust gas flow direction from the exhaust gas inlet 26a of the exhaust gas purification apparatus 10.
It is needless to say that various modifications can be made within the range that can be conceived by those skilled in the art.
Description of reference numerals
10: exhaust gas purification device, 12: case, 12 a: exhaust gas suction inlet, 12 b: exhaust gas discharge port, 14: impeller, 16: nozzle, 18: rotation axis, 20: cleaning solution, 22: demister, E: and (4) exhaust gas.

Claims (4)

1. An exhaust gas purification device provided with: a housing (12) having an exhaust gas inlet (12a) and an exhaust gas outlet (12 b); an impeller (14) which is disposed in the housing (12) and supported by a rotating shaft (18); and a nozzle (16) for discharging a cleaning liquid (20) into the impeller (14), wherein the exhaust gas cleaning device is configured to rotate the impeller (14) to suck an exhaust gas (E) containing dust and cleaning liquid-soluble components through the exhaust gas suction port (12a), and wherein the cleaning liquid (20) discharged from the nozzle (16) is configured to capture the dust and cleaning liquid-soluble components in the exhaust gas (E) and remove the components contained in the exhaust gas (E),
the rotating shaft (18) is disposed in the vertical direction, the impeller (14) rotates in the horizontal direction, and,
the exhaust gas suction port (12a) is opened in the bottom surface of the housing (12).
2. The exhaust gas purification apparatus according to claim 1,
a demister (22) is arranged on the side peripheral surface of the impeller (14).
3. The exhaust gas purification apparatus according to claim 1 or 2,
a part of the exhaust gas (E) discharged from the exhaust gas discharge port (12b) to the outside of the casing (12) is returned to the exhaust gas suction port (12a) again.
4. An exhaust gas purification apparatus comprising a decomposition furnace for thermally decomposing exhaust gas and the exhaust gas purification apparatus according to any one of claims 1 to 3,
the exhaust gas purification device is provided at least at a front stage of the decomposing furnace.
CN201980076762.0A 2019-03-08 2019-03-08 Exhaust gas purification device and exhaust gas harmful removal device using same Pending CN113164865A (en)

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WO2023127144A1 (en) * 2021-12-28 2023-07-06 カンケンテクノ株式会社 Exhaust gas purification device
WO2023127166A1 (en) * 2021-12-29 2023-07-06 カンケンテクノ株式会社 Gas purification device

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