CN110075667B - Exhaust gas treatment system - Google Patents
Exhaust gas treatment system Download PDFInfo
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- CN110075667B CN110075667B CN201910465712.3A CN201910465712A CN110075667B CN 110075667 B CN110075667 B CN 110075667B CN 201910465712 A CN201910465712 A CN 201910465712A CN 110075667 B CN110075667 B CN 110075667B
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- gas
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- 239000007789 gas Substances 0.000 claims abstract description 74
- 238000003795 desorption Methods 0.000 claims abstract description 45
- 239000002912 waste gas Substances 0.000 claims abstract description 19
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 15
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 14
- 239000010457 zeolite Substances 0.000 claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 238000007781 pre-processing Methods 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000004321 preservation Methods 0.000 claims 1
- 230000035939 shock Effects 0.000 claims 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 24
- 230000001276 controlling effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012855 volatile organic compound Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000010815 organic waste Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- -1 diisocyanatotoluene ester Chemical class 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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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
- B01D53/06—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 moving adsorbents, e.g. rotating beds
-
- 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
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/063—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating electric heating
-
- 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
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2202/00—Combustion
- F23G2202/60—Combustion in a catalytic combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention provides an exhaust gas treatment system which comprises a first pretreatment device, a second pretreatment device, a zeolite rotating wheel, a heat exchange device and a catalytic combustion device which are sequentially connected, wherein the zeolite rotating wheel comprises a desorption area, the desorption area is connected with the heat exchange device through a third pipeline, the second pretreatment device comprises an air outlet end and an air inlet end, the air outlet end is connected with the third pipeline through a fourth pipeline and then connected with the heat exchange device, the air inlet end is connected with an exhaust gas inlet through a pipeline and is connected to the third pipeline through a branch pipeline, gas in the third pipeline enters the branch pipeline and then enters the fourth pipeline, and the temperature in the fourth pipeline is insulated by utilizing residual temperature carried by desorption gas. The waste gas treatment system provided by the invention uses the residual temperature of the organic gas desorbed from the first pretreatment device to preserve the heat of the pipeline of the second pretreatment device, so that formaldehyde waste gas can be effectively treated.
Description
Technical Field
The invention relates to the field of waste gas purification, in particular to a waste gas treatment system.
Background
The volatile organic compounds are common atmospheric pollutants and are generated in the industries of paint production, chemical fiber industry, metal coating, chemical coating, shoe and leather making, plywood manufacturing, tire manufacturing and the like. The volatile organic compounds are classified into: alkanes, aromatic hydrocarbons, esters, aldehydes, and others. The most common are benzene, toluene, xylene, styrene, diisocyanate, diisocyanatotoluene ester, formaldehyde, and the like. The gas purification methods commonly used at present comprise an adsorption method, a biodegradation method and a combustion method. The adsorption method has a simple structure and is convenient to use, but due to the special chemical properties of some pollutants, such as formaldehyde, which is easy to crystallize and adhere to the pipe wall at low temperature, the existing treatment equipment cannot treat the pollutants with different chemical properties together, and additional equipment is required for separate treatment, so that the cost and time for treating the volatile organic compounds are increased.
Disclosure of Invention
In view of the foregoing, there is a need for an improved exhaust treatment system that is capable of treating a variety of gases, saving costs and time.
The invention provides an exhaust gas treatment system which comprises a first pretreatment device, a zeolite rotating wheel, a heat exchange device, a catalytic combustion device and an exhaust port which are sequentially connected with the zeolite rotating wheel and the heat exchange device through pipelines respectively, wherein the zeolite rotating wheel comprises a desorption region, a desorption gas outlet of the desorption region is connected with the heat exchange device through a third pipeline, the exhaust gas treatment system also comprises a second pretreatment device, the second pretreatment device comprises an air outlet end and an air inlet end, the air outlet end is connected with the third pipeline through a fourth pipeline and then connected with the heat exchange device, the air inlet end is connected with an exhaust gas inlet through a pipeline and is connected with the third pipeline through a branch pipeline, a desorption gas part in the third pipeline enters the branch pipeline and enters the fourth pipeline through the second pretreatment device, and the temperature in the fourth pipeline is kept warm by utilizing residual temperature carried by the desorption gas.
Further, a temperature sensor is arranged on the fourth pipeline and used for sensing the temperature in the fourth pipeline.
Further, an air inlet regulating valve is further arranged on the branch pipeline and is used for regulating the amount of desorption gas entering the fourth pipeline according to the temperature sensed by the temperature sensor so as to keep the temperature in the fourth pipeline within a required range.
Further, the branch pipe is connected to a pipe adjacent to the exhaust gas intake port.
Further, a pipeline heater is further arranged on the fourth pipeline, and the pipeline heater and the temperature sensor are cooperatively used for ensuring that the temperature in the fourth pipeline is within a required range when the second pretreatment device works independently.
Further, a desorption fan is arranged on the third pipeline, and the branch pipeline is connected to the third pipeline between the desorption fan and the fourth pipeline.
Further, the fourth pipeline is further provided with an adsorption fan, an air inlet valve and a check valve in sequence, and the adsorption fan, the air inlet valve and the check valve are used for accelerating the flow of gas in the fourth pipeline and avoiding backflow caused by collision with desorption gas in the third pipeline.
Further, the desorption fan and the adsorption fan are in soft connection with the corresponding pipelines, and are used for noise elimination and noise reduction of the fan and pipeline vibration reduction.
Further, the fourth pipeline is connected with the exhaust port through a branch pipeline, one end of the branch pipeline is positioned on the fourth pipeline between the adsorption fan and the air inlet valve, and a discharge valve is arranged on the branch pipeline.
Further, a pipeline heat insulation facility is further arranged on the fourth pipeline and used for preventing the temperature in the fourth pipeline from being lost too quickly and keeping the temperature in the pipeline.
In the exhaust gas treatment system, through being provided with two exhaust gas air inlets and preprocessing device, can handle multiple organic waste gas, utilize the residual temperature of the organic matter gas that first preprocessing device desorbed out to keep warm the pipeline of second preprocessing device, can effectively handle formaldehyde waste gas, consequently, can handle multiple organic waste gas and formaldehyde waste gas, need not additionally to add treatment facility, practice thrift processing cost for process time.
Drawings
Fig. 1 is a schematic diagram of an exhaust gas treatment system according to an embodiment of the present invention.
Description of the main reference signs
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "mounted" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the exhaust gas treatment system 100 shown in fig. 1 is used for treating volatile organic compounds, the exhaust gas treatment system 100 includes a first pretreatment device 10, a zeolite runner 20, a heat exchange device 30, and a catalytic combustion device 40 sequentially connected by pipes, the exhaust gas treatment system 100 further includes a second pretreatment device 50 connected to the heat exchange device 30, a control system (not shown), and an exhaust port 60 connected to the zeolite runner 20, the heat exchange device 30, and the second pretreatment device 50, respectively, and the exhaust port 60 is used for discharging the treated pollution-free gas.
One end of the first pretreatment device 10 is connected with the first exhaust gas inlet 11 through a pipeline, the other end of the first pretreatment device is connected with the zeolite rotating wheel 20, one end of the first pretreatment device 10 connected with the first exhaust gas inlet 11 is further provided with a first air supplementing valve 13, and the first air supplementing valve 13 is used for controlling the adsorption force in the pipeline between the first pretreatment device 10 and the first exhaust gas inlet 11 so as to control the flow speed of exhaust gas in the pipeline. In one embodiment, the first pretreatment device 10 is a filter, which is a bag filter. In one embodiment, at least one pipe filter is further disposed on the pipe between the first pretreatment device 10 and the first exhaust gas inlet 11, so as to enhance the filtering effect of the pretreatment step. In one embodiment, at least one moisture-reducing device is further disposed on the pipeline between the first pretreatment device 10 and the first exhaust gas inlet 11, for reducing moisture in the exhaust gas.
The zeolite wheel 20 comprises an adsorption zone 21, a cooling zone 22 and a desorption zone 23, wherein one end of the adsorption zone 21 is connected with the first pretreatment device 10 through a pipeline. The other end of the adsorption zone 21 is connected with the exhaust port 60 through a pipeline, a second air supplementing valve 211 and a first adsorption fan 212 are arranged on the pipeline between the adsorption zone 21 and the exhaust port, most of the filtered waste gas is sent into the adsorption zone 21 through the first adsorption fan 212, and organic matters in the filtered waste gas are adsorbed through zeolite in the adsorption zone 21 so as to purify the waste gas to reach the emission standard and be discharged through the exhaust port 60. It will be appreciated that a conduit filter may also be provided on at least one of the conduits between the adsorption zone 21 and the exhaust port to further filter the gas.
One end of the cooling zone 22 is connected to the first pretreatment device 10 through a pipe, and the other end is connected to the heat exchange device 30 and the desorption zone 23 through a first pipe 22a and a second pipe 22b, respectively. The first pipeline 22a is sequentially provided with a cold air regulating valve 221 and a desorption fan 222, the second pipeline 22b is sequentially provided with a flame arrester 223, a desorption cold air regulating valve 224 and a wind mixer 225, the second pipeline 22b is further connected with a branch pipeline 22c, one end of the branch pipeline 22c is connected with the wind mixer 225, the other end of the branch pipeline is connected with a pipeline between the heat exchange device 30 and the exhaust port 60, and the branch pipeline 22c is provided with a desorption hot air regulating valve 226. One end of the desorption zone 23 is connected to a pipeline between the cold air regulating valve 221 and the desorption fan 222 through a third pipeline 23a, and the other end is connected to a second pipeline 22 b. The desorption cold air regulating valve 224 and the desorption hot air regulating valve 226 are used for regulating the flow of the gas entering the air mixer 225, so as to control the temperature of the gas entering the desorption zone 23, and in an embodiment, the temperature of the gas is 190-220 ℃.
The small part of the waste gas is filtered by the first pretreatment device 10 and enters the cooling zone 22 for cooling and drying, then a part of the waste gas enters the heat exchange device 30 for heating by the first pipeline 22a, then flows into the second pipeline 22b by the branch pipeline 22c, and the other part of the waste gas enters the desorption zone 23 after being mixed with the heated waste gas in the branch pipeline 22c by the second pipeline 22b, so that the organic matters on the adsorbed and saturated zeolite are heated and desorbed, the adsorption capacity of the zeolite is recovered, the desorbed high-concentration waste gas is sequentially sent into the heat exchange device 30 and the catalytic combustion device 40 by the desorption fan 222 through the third pipeline 23a, and the waste gas is combusted into pollution-free gas under the action of a catalyst and is discharged through the exhaust port 60.
The heat exchange device 30 is provided with a first air inlet 30a, a first air outlet 30b, a second air inlet 30c and a second air outlet 30d, the first air inlet 30a is connected with the desorption fan 222 through a pipeline, the first air outlet 30b is connected with the air outlet 60 through a pipeline, a discharge valve 61 is arranged on a pipeline between the first air outlet 30b and the air outlet 60, the discharge valve 61 is used for controlling the discharge of gas, and one end of the branch pipeline 22c is connected to a pipeline between the first air outlet 30b and the discharge valve 61. The second air inlet 30c and the second air outlet 30d are both connected to the catalytic combustion device 40. The specific desorbed high-concentration waste gas enters the heat exchange device 30 through the third pipeline 23a and the first air inlet 30a for heat exchange, enters the catalytic combustion device 40 through the second air outlet 30d, enters the heat exchange device 30 through the second air inlet 30c after catalytic combustion, is discharged through the first air outlet 30b, and most of gas is discharged through the air outlet 60, and the rest of gas enters the branch pipeline 22c for use as desorption gas.
The catalytic combustion device 40 is provided with a third air inlet 41 and a third air outlet 42, the third air inlet 41 is connected with the second air outlet 30d through a pipeline, the third air outlet 42 is connected with the second air inlet 30c, and the catalytic combustion device 40 is used for decomposing organic matters in gas under the action of a catalyst, so that raw waste gas is changed into pollution-free air, and the emission standard is reached. The catalytic combustion device 40 further comprises an electric heater 43, wherein the electric heater 43 is used for preheating the catalytic combustion device 40 to reach a combustion temperature standard just after starting the catalytic combustion device, and in one embodiment, the number of the electric heaters 43 is two, and the combustion temperature is greater than 300 ℃.
The second pretreatment device 50 includes an air inlet end and an air outlet end, the air inlet end is connected with the second exhaust air inlet 51 through a pipeline, the air outlet end is connected to a pipeline between the desorption fan 222 and the first air inlet 30a through a fourth pipeline 50a, the second pretreatment device 50 is used for primarily filtering exhaust air, and in an embodiment, the second pretreatment device 50 is a bag filter. The fourth pipe 50a is provided with a temperature sensor 52, a second adsorption fan 53, an air inlet valve 54, a check valve 55 and a flame arrester 56 in sequence. A branch pipeline 50b is connected to the pipeline between the second adsorption blower 53 and the air inlet valve 54, the other end of the branch pipeline 50b is connected to the air outlet 60, a discharge valve 57 is disposed on the branch pipeline 50b, and the branch pipeline 50b is used for providing a preheating time for the catalytic combustion device 40 when the second pretreatment device 50 is used alone. The second pretreatment device 50 further comprises a branch conduit 50c, wherein one end of the branch conduit 50c is connected to a conduit between the second pretreatment device 50 and the second exhaust gas inlet 51, and the other end is connected to a conduit between the desorption fan 222 and the fourth conduit 50a, and in one embodiment, the branch conduit 50c is disposed adjacent to the second exhaust gas inlet 51. The branch pipe 50c is used for introducing the organic gas desorbed from the desorption region 23 into the fourth pipe 50a, and preserving the temperature in the fourth pipe 50a by the residual temperature of the desorbed organic gas. The branched pipe 50c is provided with an air intake regulating valve 58 for regulating the proportion of the desorbed organic gas and thus controlling the temperature in the fourth pipe 50 a. Specifically, the temperature sensor 52 is connected to a control series, and the ratio of opening or closing of the intake air regulating valve 58 is controlled by the control system according to the temperature sensed by the temperature sensor 52, thereby maintaining the temperature in the fourth duct 50 a. In one embodiment, the formaldehyde gas is introduced into the second exhaust gas inlet 51 to be treated, and the temperature in the fourth pipeline 50a is adjusted to be greater than 40 degrees, so as to facilitate the further treatment of the formaldehyde gas in the subsequent step, because the formaldehyde gas is easy to crystallize at low temperature. It will be appreciated that the first pretreatment device 10 may treat organic waste gases such as alkanes, aromatic hydrocarbons, esters, etc., and the second pretreatment device 50 may also treat organic waste gases such as styrene, etc.
In one embodiment, the fourth pipeline 50a is provided with a pipeline heater (not shown), and the pipeline heater is connected with a control system, so as to maintain the temperature required for treating the special volatile organic compounds, such as formaldehyde, in the fourth pipeline 50 a. The pipeline heater may be used when the second pretreatment device 50 is operated alone.
In one embodiment, the branch pipe 22c, the pipe between the heat exchange device 30 and the discharge valve 61, the third pipe 23a, the fourth pipe 50a, and the pipe between the desorption fan 222 and the fourth pipe 50a are provided with a pipe heat insulation facility 70 for preventing the temperature in the pipe from being lost too quickly, and maintaining the temperature in the pipe, and it is understood that the position where the pipe heat insulation facility is provided is not limited to the position in the above embodiment, and the pipe heat insulation facility may be provided on other connection pipes as needed.
In an embodiment, temperature sensors 80 are disposed on the first air outlet 30b, the catalytic combustion device 40, the third pipeline 23a of the electric heater 43, and the pipeline between the air mixer 225 and the desorption zone 23, and the temperature sensors 80 are used for ensuring that the temperatures in the corresponding pipeline and device reach the operation standard in the preheating and desorption stage of the exhaust gas treatment system 100. In one embodiment, at least two temperature sensors 80 are disposed on the conduit from the air mixer 225 to the desorption zone 23. The temperature sensor 80 and all control valves in the exhaust gas treatment system 100 are connected with the control system, and the control system is used for controlling the opening and closing of the control valves and controlling the opening and closing degree of the control valves on the corresponding pipelines according to the temperature sensed by the temperature sensor 80, so that the normal operation of the exhaust gas treatment system 100 is ensured.
It can be appreciated that the first adsorption fan 212, the desorption fan 222 and the second adsorption fan 53 are all flexibly connected with the pipeline for noise elimination and noise reduction of the fans and vibration reduction of the pipeline.
The exhaust gas treatment system provided by the invention is provided with the two exhaust gas inlets and the pretreatment device, can treat various organic exhaust gases, can effectively treat formaldehyde exhaust gas by utilizing the residual temperature of the organic gas desorbed by the first pretreatment device to preserve the temperature of the pipeline of the second pretreatment device, does not need to additionally add treatment equipment, saves treatment cost, quickens treatment time, increases gas treatment capacity, and can independently treat formaldehyde gas when the first pretreatment device does not work by arranging the pipeline heater.
It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustrating the invention and are not to be construed as limiting the invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.
Claims (10)
1. The utility model provides an exhaust treatment system, includes first preprocessing device, zeolite runner, heat exchange device, catalytic combustion device and respectively with zeolite runner and heat exchange device pass through the gas vent of pipe connection, zeolite runner includes the desorption district, the desorption gas outlet in desorption district pass through the third pipeline with heat exchange device connects, its characterized in that: the waste gas treatment system further comprises a second pretreatment device, the second pretreatment device comprises an air outlet end and an air inlet end, the air outlet end is connected with the third pipeline through a fourth pipeline and then connected with the heat exchange device, the air inlet end is connected with a waste gas inlet through a pipeline and is connected to the third pipeline through a branch pipeline, desorption gas in the third pipeline partially enters the branch pipeline and enters the fourth pipeline through the second pretreatment device, and the temperature in the fourth pipeline is kept warm by utilizing residual temperature carried by the desorption gas.
2. The exhaust treatment system of claim 1, wherein: and a temperature sensor is arranged on the fourth pipeline and used for sensing the temperature in the fourth pipeline.
3. The exhaust treatment system of claim 2, wherein: and the branch pipeline is also provided with an air inlet regulating valve which is used for regulating the amount of desorption gas entering the fourth pipeline according to the temperature sensed by the temperature sensor so as to keep the temperature in the fourth pipeline within a required range.
4. The exhaust treatment system of claim 1, wherein: the branch conduit is connected to a conduit adjacent the exhaust gas inlet.
5. The exhaust treatment system of claim 2, wherein: and a pipeline heater is further arranged on the fourth pipeline, and the pipeline heater and the temperature sensor are cooperatively used for ensuring that the temperature in the fourth pipeline is in a required range when the second pretreatment device works independently.
6. The exhaust treatment system of claim 1, wherein: and a desorption fan is arranged on the third pipeline, and the branch pipeline is connected to the third pipeline between the desorption fan and the fourth pipeline.
7. The exhaust treatment system of claim 6, wherein: and the fourth pipeline is also provided with an adsorption fan, an air inlet valve and a check valve in sequence, and the adsorption fan, the air inlet valve and the check valve are used for accelerating the flow of gas in the fourth pipeline and avoiding backflow caused by collision with desorption gas in the third pipeline.
8. The exhaust treatment system of claim 7, wherein: the desorption fan is in soft connection with the adsorption fan and the corresponding pipeline, and is used for noise elimination and noise reduction of the fan and pipeline shock absorption.
9. The exhaust treatment system of claim 7, wherein: the fourth pipeline is connected with the exhaust port through a branch pipeline, one end of the branch pipeline is positioned on the fourth pipeline between the adsorption fan and the air inlet valve, and a discharge valve is arranged on the branch pipeline.
10. The exhaust treatment system of claim 1, wherein: and a pipeline heat preservation facility is further arranged on the fourth pipeline and used for preventing the temperature in the fourth pipeline from being lost too quickly and keeping the temperature in the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465712.3A CN110075667B (en) | 2019-05-30 | 2019-05-30 | Exhaust gas treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465712.3A CN110075667B (en) | 2019-05-30 | 2019-05-30 | Exhaust gas treatment system |
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| CN110075667A CN110075667A (en) | 2019-08-02 |
| CN110075667B true CN110075667B (en) | 2024-04-02 |
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| CN201910465712.3A Active CN110075667B (en) | 2019-05-30 | 2019-05-30 | Exhaust gas treatment system |
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| CN110075667B (en) * | 2019-05-30 | 2024-04-02 | 江苏新聚环保科技有限公司 | Exhaust gas treatment system |
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