CN114225576B - VOCs waste gas treatment method - Google Patents
VOCs waste gas treatment method Download PDFInfo
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- CN114225576B CN114225576B CN202111319990.1A CN202111319990A CN114225576B CN 114225576 B CN114225576 B CN 114225576B CN 202111319990 A CN202111319990 A CN 202111319990A CN 114225576 B CN114225576 B CN 114225576B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/343—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances the substance being a gas
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- 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
- B01D53/002—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 by condensation
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- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a VOCs waste gas treatment method, which comprises the following steps: A. and (3) filtering: primary filtering VOCs waste gas through a filter; B. adsorption: absorbing the VOCs waste gas subjected to primary filtration treatment by using a molecular sieve adsorbent; C. desorption: desorbing and regenerating the molecular sieve adsorbent by using inert gas to obtain VOCs mixed gas; D. absorption: condensing the VOCs mixed gas, and absorbing by using an absorbent to obtain a mixed liquid; E. carrying out steam stripping rectification, namely preheating the mixed solution and then introducing the preheated mixed solution into a rectifying tower for steam stripping rectification, discharging heavy components in the absorbent and the VOCs from different liquid discharging ports in a liquid phase form, and discharging light components in the VOCs from a gas discharging port at the top in a gas phase form; and (3) combustion: introducing VOCs gas discharged from the top of the rectifying tower into a heating furnace for combustion; compared with the prior art, the invention improves the purification rate of the VOCs gas.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a VOCs waste gas treatment method.
Background
The natural oil science and technology circular economy innovation mode uses renewable raw materials, and through technological innovation, circular comprehensive utilization and treatment, the utilization rate of resources is greatly improved, the energy and resource consumption is reduced, the damage of pollutants to the environment is reduced, and the product is greener and safer and actively assists the green manufacture and sustainable development of China.
However, the treatment of industrial waste gas in the oil fine chemical industry faces huge environmental protection problems at present, the industrial waste gas contains VOCs organic gas with complex components, the VOCs organic gas is treated by adopting the matching of simple modes such as absorption or rectification, the purification efficiency is only about seventy percent, and the requirement on environmental protection control cannot be met at all.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a VOCs waste gas treatment method to solve the problem that in the prior art, the purification efficiency of VOCs organic gases in industrial waste gas of grease fine chemistry industry is low.
In order to realize the purpose, the invention adopts the following technical scheme: a VOCs waste gas treatment method comprises the following steps:
A. and (3) filtering: primary filtering VOCs waste gas through a filter;
B. adsorption: absorbing the VOCs waste gas subjected to primary filtration treatment by using a molecular sieve adsorbent;
C. desorption: desorbing and regenerating the molecular sieve adsorbent by using inert gas to obtain VOCs mixed gas;
D. absorption: condensing the VOCs mixed gas, and absorbing by using an absorbent to obtain a mixed liquid;
E. carrying out steam stripping rectification, namely preheating the mixed solution and then introducing the preheated mixed solution into a rectifying tower for steam stripping rectification, discharging heavy components in the absorbent and the VOCs from different liquid discharging ports in a liquid phase form, and discharging light components in the VOCs from a gas discharging port at the top in a gas phase form;
and (3) combustion: and introducing the VOCs gas discharged from the top of the rectifying tower into a heating furnace for combustion.
Compared with the prior art, the invention has the following beneficial effects:
the VOCs waste gas treatment method carries out purification treatment on VOCs organic gas through the cooperation of a series of technologies of filtering, adsorption, desorption, absorption, steam stripping rectification and combustion, the purification efficiency reaches over 99.5 percent, and the environmental protection requirement is completely met.
Drawings
FIG. 1 is a schematic view of a connection between a heating furnace and a hybrid gas head according to an embodiment of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Reference numerals in the drawings of the specification include: the device comprises a heating furnace 1, a mixed gas guide head 2, a preheating cavity 3, a flue gas filter 4, a filtering cavity 41, a filter screen 42, a mixed gas guide head body 21, a spherical cavity 22, a conical cavity 23, a deflection baffle 24, an opposite flow channel 25, a jet flow channel 26, a spiral groove 27, an impeller 5, a cam 6, a transmission shaft 7 and a return spring 8.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
the embodiment of the invention provides a VOCs waste gas treatment method, which comprises the following steps:
A. and (3) filtering: primary filtering VOCs waste gas through a filter; specifically, starting from the source of a grease production process, emptying tail gas of a reactor in the grease production process and an odor emission point of a production site to collect VOCs waste gas, and filtering the waste gas by a filter to remove large solid particles and liquid drops contained in the VOCs waste gas;
B. adsorption: absorbing the VOCs waste gas subjected to primary filtration treatment by adopting a molecular sieve adsorbent; since the VOCs waste gas contains a large amount of large solid particles and liquid drops in the collecting process, if the molecular sieve adsorbent is directly used for adsorption, the molecular sieve adsorbent is quickly in a saturated state, so that the desorption regeneration frequency of the molecular sieve adsorbent is greatly increased, and the purification efficiency of the molecular sieve adsorbent is seriously influenced; the adsorption capacity of the molecular sieve adsorbent can be greatly reduced by attaching the liquid drops on the surface of the molecular sieve adsorbent;
C. desorption: desorbing and regenerating the molecular sieve adsorbent by using inert gas at the temperature of 100-110 ℃ to obtain VOCs mixed gas; the inert gas can be nitrogen, helium and the like, and the nitrogen is relatively commonly used; the design of the temperature condition can accelerate the desorption and regeneration capacity of the molecular sieve adsorbent, and the molecular sieve adsorbent cannot be damaged;
D. absorption: condensing the VOCs mixed gas, and absorbing by using an absorbent to obtain a mixed liquid; the absorbent can select some crude oil separation liquid according to the similar phase dissolving principle, and the selected crude oil separation liquid is used as heavy components, so that the heavy components in the crude oil separation liquid and the VOCs mixed gas can be separated and recovered in the subsequent steam stripping rectification;
E. carrying out steam stripping rectification, namely preheating the mixed solution and then introducing the preheated mixed solution into a rectifying tower for steam stripping rectification, discharging heavy components in the absorbent and the VOCs from different liquid discharging ports in a liquid phase form, and discharging light components in the VOCs from a gas discharging port at the top in a gas phase form; the absorbent can be recycled;
F. and (3) combustion: introducing VOCs gas discharged from the top of the rectifying tower into a heating furnace for combustion, wherein the combustion temperature in the heating furnace is 1350-1500 ℃, so as to further remove components in the VOCs gas; the analyst detects and analyzes the exhaust gas of the heating furnace, and the purification efficiency of the VOCs gas reaches over 99.5 percent.
As shown in fig. 2, according to another embodiment of the present invention, in the method for treating VOCs waste gas, VOCs gas discharged from the top of the rectifying tower is introduced into the mixing gas-guiding head 2 through a VOCs gas-introducing pipe, and high-pressure air is introduced into the mixing gas-guiding head 2 through a high-pressure air pipe, so that after the VOCs gas and the high-pressure air are uniformly mixed in the mixing gas-guiding head 2, combustion in the heating furnace 1 is more sufficient, and the purification efficiency of VOCs gas is better; meanwhile, a preheating cavity 3 is arranged on the outer side of the middle part of the mixed gas guide head 2, an exhaust hole of the heating furnace 1 is communicated with a flue gas filter 4, and a gas outlet of the flue gas filter 4 is communicated with the preheating cavity 3 through a gas guide pipe; the flue gas filter 4 comprises a filtering cavity 41 communicated between the gas outlet and the gas guide tube of the flue gas filter 4 and a filter screen 42 arranged in the filtering cavity 41 in a sliding mode along the gas flowing direction in the filtering cavity 41, an intermittent top plate assembly is arranged between the mixing gas guide head 2 and the filter screen 42, and the intermittent top plate assembly enables the filter screen 42 to shake in the filtering cavity 41 in a reciprocating mode through gas flowing in the mixing gas guide head 2.
The waste gas generated after the VOCs gas is combusted in the heating furnace 1 contains a small amount of smoke dust, is filtered by the smoke filter 4 and then is introduced into the preheating cavity 3 to preheat the gas entering the mixed gas guide head 2, so that the gas can be more efficiently combusted in the heating furnace 1; meanwhile, the flowing gas in the mixing air guide head 2 enables the filter screen 42 to shake in a reciprocating mode in the filter cavity 41 through the intermittent top plate assembly, smoke dust adhered to the filter screen 42 can be shaken off quickly, and the filtering efficiency of the filter screen 42 is improved.
The design of the flue gas filter 4 prevents the smoke dust from entering the preheating cavity 3, and the inner wall of the preheating cavity 3 is not attached with a layer of smoke dust, so that the heat exchange efficiency between the preheating cavity 3 and the mixed gas guide head 2 is improved.
The preheating cavity 3 is connected with an exhaust pipe, and the exhaust pipe discharges the gas subjected to waste heat recovery from the preheating cavity 3.
As shown in fig. 2, according to another embodiment of the present invention, the mixing gas-guiding head 2 includes a mixing gas-guiding head 2 body and a mixing channel disposed in the mixing gas-guiding head 2 body, a discharge port of the mixing channel is communicated with the heating furnace 1, the mixing channel includes a jet flow introduction channel section, a buffer mixing cavity section and an opposite mixing channel section which are sequentially communicated, one end of the jet flow introduction channel section far from the buffer mixing cavity section is communicated with a high pressure air pipe and a VOCs gas introduction pipe, an end of the opposite mixing channel section far from the buffer mixing cavity section is communicated with the inside of the heating furnace 1, the preheating cavity 3 is sleeved outside the buffer mixing cavity section, and the intermittent top plate assembly is disposed between the buffer mixing cavity section and the filter screen 42.
High-pressure air pipes guide high-pressure air into the jet flow guide-in channel sections, speed of VOCs gas discharged from the top of the rectifying tower for guiding the incident flow into the channel sections through the VOCs gas guide-in pipes is accelerated, the high-pressure air and the VOCs gas are primarily mixed in the jet flow guide-in channel sections and are quickly guided into the buffer mixing cavity sections for buffering and mixing again, then the high-pressure air and the VOCs gas are uniformly mixed and guided into the heating furnace 1 for combustion after being mixed in an opposite-flushing mode, flue gas generated by combustion in the heating furnace 1 is discharged into the filtering cavity 41, is subjected to smoke filtration through the filter screen 42 and then is guided into the preheating cavity 3, and mixed gas entering the buffer mixing cavity sections is preheated.
Combustion in the furnace 1 requires the introduction of fuel to enable combustion of the VOCs gases therein.
In this embodiment, the buffering compounding chamber section that adopts includes spherical chamber 22 and the conical cavity 23 of big-end and spherical chamber 22 intercommunication, the little head end and the hedging compounding passageway section intercommunication in conical cavity 23, the air inlet and the leading-in passageway section intercommunication of efflux that conical cavity 23 one side was kept away from to spherical chamber 22, it has a plurality of baffling baffles 24 to lie in staggered arrangement between its air inlet and the conical cavity 23 in the spherical chamber 22, it establishes in the spherical chamber 22 outside to preheat the 3 covers of cavity, intermittent type roof subassembly sets up between the little head end and the filter screen 42 in conical cavity 23.
The gaseous mist of jet-flow leading-in passageway section with highly-compressed air and VOCs is directed into in the spherical chamber 22 and is cushioned and can mix once more, the route that the mist carries out mixing flow in the spherical chamber 22 of arrangement mode extension of a plurality of baffling baffle 24, still the mist bumps on baffling baffle 24, come further to accelerate the mixing effect of mist, the structural design of rethread tapered cavity 23 pressurizes the flow of mist, improve the velocity of flow that the mist got into in the hedging compounding passageway section, still be favorable to improving the transmission efficiency of intermittent type roof subassembly simultaneously, so that filter screen 42's frequency of motion is bigger, the smoke and dust effect of adhesion is better on the shake-off filter screen 42.
The spherical cavity 22 can also be designed into a required shape according to actual requirements.
The adopted hedging and mixing channel section comprises two hedging flow channels 25, one ends of the two hedging flow channels 25 are communicated with the small end of the conical cavity 23, and the other ends of the two hedging flow channels are arranged in opposite directions and are communicated with the heating furnace 1.
The opposite-flushing material mixing channel section is composed of two opposite-flushing flow channels 25, the arrangement mode is that the mixed gas led out from the conical cavity 23 is divided to enter from one ends of the two pairs of opposite-flushing flow channels 25, then flows out from the other ends of the two pairs of opposite-flushing flow channels 25 to carry out opposite flushing, so that the mixed gas is further mixed more uniformly, and then is led into the heating furnace 1.
Wherein, the efflux channel section of leading in of adoption is including being the efflux runner 26 of toper, and the tip of efflux runner 26 communicates with the air inlet of spherical chamber 22, and the stub end and the high-pressure air pipe of efflux runner 26 and the gaseous inlet tube of VOCs all communicate, and spiral groove 27 has been arranged along its axial direction to the efflux runner 26 inner wall.
After the high-pressure air pipe guides the high-pressure air into the jet flow channel 26, the speed of the high-pressure air entering the spherical cavity 22 is further increased according to the shape design and the arrangement of the spiral groove 27, so that the VOCs gas discharged from the top of the rectifying tower is driven to pass through the speed of the VOCs gas guide pipe guiding the high-pressure air into the jet flow channel 26, and the high-pressure air and the VOCs gas are quickly mixed for the first time.
According to another embodiment of the present invention, as shown in fig. 2, the method for treating VOCs waste gas includes that the intermittent top plate assembly includes an impeller 5 rotatably disposed in the small end of the conical cavity 23 and a cam 6 rotatably disposed in the filtering cavity 41, the cam 6 is connected to the impeller 5 through a transmission shaft 7, the cam 6 is disposed on one side of the filter screen 42, and one side of the filter screen 42 away from the cam 6 is connected to the inner wall of the filtering cavity 41 through a plurality of return springs 8; the cam 6 intermittently contacts the screen 42 during rotation and moves the screen 42.
Wherein, the structural design of toper chamber 23 improves the slew velocity of impeller 5 to make impeller 5 pass through the rotational frequency of transmission shaft 7 drive cam 6 faster, the elasticity of cooperation reset spring 8 resets and makes filter screen 42 carry out reciprocating motion to the smoke and dust in filtering cavity 41, makes the ability reduction of smoke and dust adhesion on filter screen 42, is favorable to improving the filter effect of filter screen 42.
The distance between the farthest edge of the cam 6 and the rotation center thereof is greater than the distance between the rotation center thereof and the sieve 42, but the distance between the nearest edge of the cam 6 and the rotation center thereof is less than the distance between the rotation center thereof and the sieve 42; therefore, in the rotating process of the cam 6, the cam intermittently abuts against the filter screen 42 to enable the filter screen 42 to move towards the direction close to the return spring 8, the return spring 8 contracts, and then the cam disengages from the filter screen 42 to abut against the filter screen 42, so that the filter screen 42 moves in the reverse direction under the action of the elastic return force of the return spring 8, and the filter screen 42 reciprocates in the filter cavity 41.
Two sliding grooves which are arranged oppositely are formed in the inner wall of the filtering cavity 41, the filter screen 42 moves between the two sliding grooves, the number of the return springs 8 is two, and one return spring is arranged in each sliding groove, so that the movement of the filter screen 42 is more stable.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. A VOCs waste gas treatment method is characterized by comprising the following steps:
A. and (3) filtering: primary filtering VOCs waste gas through a filter;
B. adsorption: absorbing the VOCs waste gas subjected to primary filtration treatment by adopting a molecular sieve adsorbent;
C. desorption: desorbing and regenerating the molecular sieve adsorbent by using inert gas to obtain VOCs mixed gas;
D. absorption: condensing the VOCs mixed gas, and absorbing by using an absorbent to obtain a mixed liquid;
E. carrying out steam stripping rectification, namely preheating the mixed solution and then introducing the preheated mixed solution into a rectifying tower for steam stripping rectification, discharging heavy components in the absorbent and the VOCs from different liquid discharging ports in a liquid phase form, and discharging light components in the VOCs from a gas discharging port at the top in a gas phase form;
F. and (3) combustion: introducing VOCs gas discharged from the top of the rectifying tower into a heating furnace for combustion;
in the step F, VOCs gas discharged from the top of the rectifying tower and air led in from the outside are fully mixed by a mixed gas guide head and then led into the heating furnace, a preheating cavity is arranged on the outer side of the middle part of the mixed gas guide head, an exhaust hole of the heating furnace is communicated with a flue gas filter, and an air outlet of the flue gas filter is communicated with the preheating cavity through an air guide pipe; the flue gas filter comprises a filtering cavity communicated between the gas outlet and the gas guide tube of the flue gas filter and a filter screen arranged in the filtering cavity in a sliding manner along the gas flowing direction in the filtering cavity, an intermittent top plate component is arranged between the mixing gas guide head and the filter screen, the intermittent top plate component enables the filter screen to shake in the filtering cavity in a reciprocating manner by mixing the gas flowing in the gas guide head,
mix leading gas head including mixing leading gas head body and at the mixing passageway of leading this internal seting up of mixing leading gas head, the discharge gate and the heating furnace intercommunication of mixing passageway, the mixing passageway is including the efflux leading-in passageway section that communicates in proper order, buffering compounding chamber section and offset compounding passageway section, the one end intercommunication that buffering compounding chamber section was kept away from to efflux leading-in passageway section has highly-compressed air pipe and the gaseous induction pipe of VOCs, the intercommunication in tip and the heating furnace of buffering compounding chamber section is kept away from to offset compounding passageway section, preheat the cavity cover and establish in buffering compounding chamber section outside, and intermittent type roof subassembly sets up between buffering compounding chamber section and filter screen.
2. A method according to claim 1 for treating waste gases containing VOCs, comprising: in the step F, the combustion temperature in the heating furnace is 1350-1500 ℃.
3. A method according to claim 1 for treating waste gases containing VOCs, comprising: in the step C, the desorption temperature is 100-110 ℃.
4. A method according to claim 1 for treating waste gases containing VOCs, comprising: buffering compounding chamber section includes the toper chamber of spherical chamber and stub end and spherical chamber intercommunication, the microcephaly end and the hedging compounding passageway section intercommunication in toper chamber, the air inlet and the leading-in passageway section intercommunication of efflux that toper chamber one side was kept away from in spherical chamber, spherical intracavity lies in staggered arrangement between its air inlet and the toper chamber has a plurality of baffling baffles, preheat the cavity cover and establish in the spherical chamber outside, intermittent type roof subassembly sets up between the microcephaly end and the filter screen in toper chamber.
5. A method according to claim 4, wherein the treatment of waste gases containing VOCs comprises: the intermittent top plate assembly comprises an impeller rotatably arranged in the small end of the conical cavity and a cam rotatably arranged in the filtering cavity, the cam is connected with the impeller through a transmission shaft, the cam is positioned on one side of the filter screen, and one side of the filter screen, which is far away from the cam, is connected with the inner wall of the filtering cavity through a plurality of reset springs; the cam intermittently pushes against the filter screen and moves the filter screen during rotation.
6. A method according to claim 4, wherein the treatment of waste gases containing VOCs comprises: the opposite-flushing material mixing channel section comprises two opposite-flushing flow channels, one ends of the two opposite-flushing flow channels are communicated with the small end of the conical cavity, and the other ends of the two opposite-flushing flow channels are oppositely arranged and communicated with the heating furnace.
7. A method according to claim 4, wherein the treatment of waste gases containing VOCs comprises: the jet flow guide-in channel section comprises a conical jet flow channel, the small head end of the jet flow channel is communicated with the air inlet of the spherical cavity, the large head end of the jet flow channel is communicated with the high-pressure air pipe and the VOCs gas inlet pipe, and the inner wall of the jet flow channel is provided with a spiral groove along the axial direction of the inner wall.
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| EP1847778A1 (en) * | 2006-04-21 | 2007-10-24 | Siemens Aktiengesellschaft | Pre-mix combustion system for a gas turbine and method of operating the same |
| CN107261754B (en) * | 2017-08-11 | 2023-11-28 | 河北先河正源环境治理技术有限公司 | VOCs waste gas recovery treatment method and device |
| CN211502822U (en) * | 2019-12-13 | 2020-09-15 | 石家庄恒业环保科技有限公司 | Catalytic combustion furnace for waste gas treatment |
| CN211585710U (en) * | 2019-12-31 | 2020-09-29 | 苏州天惠达工程科技有限公司 | FFU air filter unit for purification workshop |
| CN212017297U (en) * | 2020-03-17 | 2020-11-27 | 吉安永翔硅业新材料有限公司 | VOC exhaust treatment device is used in production of combination polyether polyol |
| CN212417446U (en) * | 2020-05-26 | 2021-01-29 | 平罗县阳光焦化有限公司 | VOC processing apparatus of coke-oven plant |
| CN213453650U (en) * | 2020-10-26 | 2021-06-15 | 天津市普林思瑞科技发展有限公司 | VOCs organic waste gas handles with firing burning furnace |
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