CN117101300B

CN117101300B - VOCs exhaust treatment system

Info

Publication number: CN117101300B
Application number: CN202311085460.4A
Authority: CN
Inventors: 谭妙君; 丁睿; 张帅
Original assignee: Shenzhen Ruiweisheng Environmental Protection Technology Co ltd
Current assignee: Shenzhen Ruiweisheng Environmental Protection Technology Co ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-05-24
Anticipated expiration: 2043-08-25
Also published as: CN117101300A

Abstract

The invention provides a VOCs waste gas treatment system, which belongs to the technical field of waste gas treatment and comprises an integrated box, an isolation unit, a waste gas treatment unit, a control valve group and a detection unit; an exhaust gas inlet channel, an isolation cavity and an air outlet channel which are distributed along the first horizontal direction are formed in the integrated box, exhaust gas inlets are formed at two ends of the exhaust gas inlet channel respectively, and an exhaust port is formed at one side of the air outlet channel away from the isolation cavity; the isolation unit divides the isolation cavity into two accommodating cavities; the waste gas treatment unit is arranged in the accommodating cavity, the gas inlet of the waste gas treatment unit is communicated with the waste gas inlet channel, and the gas outlet of the waste gas treatment unit is communicated with the gas outlet channel; the two control valve groups respectively correspond to air inlets of the two waste gas treatment units; the detection unit is arranged in the accommodating cavity. The VOCs waste gas treatment system provided by the invention has higher use safety and higher waste gas treatment efficiency.

Description

VOCs exhaust treatment system

Technical Field

The invention belongs to the technical field of waste gas treatment, and particularly relates to a VOCs waste gas treatment system.

Background

VOCs (volatile organic compounds) refer to: refers to an organic compound having a saturated vapor pressure of 70Pa or more and a boiling point of 260 ℃ or less at normal temperature or an organic compound having a vapor pressure of 10Pa or more and having volatility at 20 ℃. VOCs are generally classified into non-methane hydrocarbon, oxygen-containing organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, sulfur-containing organic compounds and the like, and the VOCs participate in the formation of ozone and secondary aerosol in the atmospheric environment, and have important influences on regional atmospheric ozone pollution and PM2.5 pollution. Most VOCs have unpleasant special odors and are toxic, irritating, teratogenic and carcinogenic, especially benzene, toluene and formaldehyde, which cause great harm to human health, and are important precursors for city dust haze and photochemical smog. VOCs mainly originate from processes such as coal chemical industry, petrochemical industry, fuel coating manufacturing, solvent manufacturing and use, PM2.5 and ozone cooperative control can be enhanced by controlling VOCs, and the method has important significance for realizing pollution and carbon reduction cooperative synergism and promoting ecological environment quality continuous improvement.

At present, treatment methods for VOCs mainly comprise a condensation recovery method, an absorption method, a direct combustion method, a thermal combustion method, a catalytic combustion method, an active carbon adsorption method, a biological method, a plasma decomposition method, a UV ultraviolet method and the like, and corresponding treatment equipment is complex in structure and high in cost. At present, a group of treatment equipment generally corresponds to a gas transmission line, and if the treatment equipment fails in the use process, the treatment equipment usually needs to be stopped for maintenance, so that the whole waste gas treatment flow is interrupted, and the operation efficiency is affected; meanwhile, if the equipment has fire, untreated gas leakage and other problems, the equipment can threaten the surrounding environment and the safety of operators, and the equipment itself can be seriously damaged.

Disclosure of Invention

The embodiment of the invention provides a VOCs waste gas treatment system, which aims to solve the problems that the whole gas transmission line is interrupted, the operation flow is influenced and the use safety is poor due to the failure of treatment equipment in the prior art.

In order to achieve the above purpose, the invention adopts the following technical scheme: there is provided a VOCs exhaust gas treatment system comprising:

The integrated box is internally provided with an exhaust gas inlet channel, an isolation cavity and an air outlet channel which are distributed along a first horizontal direction, wherein the exhaust gas inlet channel extends along a second horizontal direction, two ends of the exhaust gas inlet channel respectively form an exhaust gas inlet on the side wall of the integrated box, one side of the air outlet channel, which is away from the isolation cavity, forms an exhaust port, and the first horizontal direction is perpendicular to the second horizontal direction;

The isolation unit is arranged in the isolation cavity and divides the isolation cavity into two accommodating cavities distributed along the second horizontal direction, and the side wall of each accommodating cavity is provided with a maintenance safety door;

The two waste gas treatment units are respectively arranged in the corresponding accommodating chambers, the air inlets of the waste gas treatment units face the waste gas inlet channels and are communicated with the waste gas inlet channels, and the air outlets face the air outlet channels and are communicated with the air outlet channels;

The two control valve groups are arranged in the exhaust gas inlet channels and correspond to the air inlets of the two exhaust gas treatment units respectively, and each control valve group is provided with a conducting state for enabling the air inlet of the exhaust gas treatment unit to be communicated with the exhaust gas inlet channel and a blocking state for enabling the air inlet of the exhaust gas treatment unit to be blocked from the exhaust gas inlet channel;

the detection unit is arranged in the accommodating cavity and can detect the working state corresponding to the waste gas treatment unit, and the detection unit is in communication connection with the control valve group.

In one possible implementation manner, an overhaul channel is formed between two side walls of the isolation cavity and corresponding side walls of the integration box respectively, the two overhaul channels are distributed along the second horizontal direction and are both located between the exhaust gas inlet channel and the exhaust gas outlet channel, and the corresponding side walls of the integration box are provided with outer safety doors.

In some embodiments, a cooling channel is formed above the service channel, a cool air inlet of the cooling channel is formed on a side wall of the integration box, a cool air outlet of the cooling channel is formed on a side wall of the cooling channel adjacent to the accommodating chamber and above the exhaust gas treatment unit, and the detection unit comprises a temperature detector for detecting the working temperature of the exhaust gas treatment unit.

In some embodiments, the cold air outlet includes a plurality of air outlet holes distributed in a rectangular array.

In some embodiments, the width of the cooling channel is gradually reduced along the direction of cool air circulation.

In some embodiments, the isolation unit includes an isolation sealing frame fixedly connected to the accommodating chamber, a plurality of isolation shutters rotatably disposed in the isolation sealing frame, and an isolation shutter driving assembly for controlling the isolation shutters to rotate synchronously, where the isolation shutter driving assembly is in communication connection with the temperature detector.

In one possible implementation manner, a fire-fighting nozzle is arranged above the accommodating chamber, the detection unit comprises a smoke detector for detecting smoke in the accommodating chamber, and the fire-fighting nozzle is in communication connection with the smoke detector.

In some embodiments, the exhaust gas treatment unit includes the shell, locates fire control skylight at shell top, and along the gas circulation direction intercommunication in order and locate pre-filter module and purification module in the shell, pre-filter module's air inlet with exhaust gas inlet channel intercommunication, purification module's gas outlet with the passageway intercommunication of giving vent to anger, the flue gas detector is located in the shell, the flue gas detector still with fire control skylight's start-stop controller communication is connected.

In some embodiments, the pre-filter module comprises a first filter and a second filter which are sequentially communicated along the gas flowing direction, wherein the air inlet of the first filter is communicated with the exhaust gas inlet channel, and the air outlet of the second filter is communicated with the air inlet of the purification module.

In some embodiments, the pre-filtering module further comprises a first bypass pipe, an inlet of the first bypass pipe is communicated with an air inlet side of the first filter, an inlet of the first bypass pipe is communicated with an air outlet side of the first filter, and a first on-off valve is further arranged on the first bypass pipe;

The detection unit further comprises a first pressure detector and a second pressure detector, the first pressure detector is arranged on the air inlet side of the first filter, the second pressure detector is arranged on the air outlet side of the first filter, and the first pressure detector and the second pressure detector are respectively in communication connection with the first on-off valve.

According to the scheme disclosed by the embodiment of the application, when the device is used, the air outlet end of one air transmission line can be simultaneously communicated with the exhaust air inlets at two sides through the score pipelines, so that double-side air inlet is realized, and in a normal use state, two control valve groups are kept in an open state, and the exhaust to be treated fills the exhaust air inlet channel firstly and then enters the two exhaust treatment units; the treated waste gas is discharged into the air outlet channel from the air outlets of the two waste gas treatment units at the same time, and is finally discharged through the air outlet of the air outlet channel; if one of the exhaust gas treatment units fails and cannot be used, the corresponding control valve group is controlled to be closed, so that the exhaust gas treatment units stop gas inlet, all exhaust gas is converged into the other exhaust gas treatment unit capable of working normally, at the moment, an operator can open a maintenance safety door of a containing chamber where the failed exhaust gas treatment unit is located under the condition that the VOCs exhaust gas treatment system is not stopped wholly, the failed exhaust gas treatment unit is maintained, the corresponding control valve group is opened after maintenance is finished, and the state that the two exhaust gas treatment units work simultaneously can be realized again.

Compared with the prior art, the VOCs waste gas treatment system has the following beneficial effects:

1) Under the prerequisite of guaranteeing waste gas air intake and post-treatment gas exhaust demand (being provided with waste gas inlet channel and air outlet channel promptly), the isolation cavity of integration box keeps apart two exhaust treatment units, avoids its direct exposure to external environment, even the leakage event takes place for exhaust treatment unit itself, untreated waste gas can leak in the isolation cavity, and not directly leak and cause large tracts of land pollution in the external environment, can promote the safety in utilization. Meanwhile, the integrated box forms a sound insulation structure outside the waste gas treatment unit, so that noise generated in the operation process of the waste gas treatment unit is isolated, and the silence of the operation is improved; for the waste gas treatment unit, the integrated box has the effect of improving the protection level, effectively avoids the damage of sun exposure, water spraying and external gas to the waste gas treatment unit, improves the overall operation stability of the treatment system, prolongs the service life and reduces the maintenance cost.

2) The isolation unit separates the isolation cavity into two mutually independent accommodating chambers, if one of the exhaust gas treatment units breaks down, the mutually independent arrangement between the two accommodating chambers realizes the isolation of fault equipment and normal equipment, so that the operation of the normal exhaust gas treatment units is prevented from being influenced by faults (such as gas leakage) to cause more serious safety accidents, the mutual isolation of the normal equipment and the fault equipment is realized, and the safety of overhaul operation is ensured.

3) The detection unit monitors the running state of the waste gas treatment unit in real time, if the running state of one of the waste gas treatment units is abnormal, the detection unit can rapidly communicate with the corresponding control valve group when a safety accident is possibly caused, so that the control valve group is rapidly closed, serious equipment damage and even safety accidents caused by introducing waste gas into the fault waste gas treatment unit are avoided, the intelligent degree and the response speed of running monitoring are improved, and the effects of stopping damage in time and improving the running safety are achieved.

4) Because among the VOCs exhaust-gas treatment system, all be equipped with the waste gas air inlet in the both sides of integration box, the air inlet quantity is more, and the mode that two sides set up makes the air inlet process of both sides waste gas not have the interference each other, and the air inlet process is steady, and the air input of waste gas is bigger for traditional processing system, and two exhaust-gas treatment units of cooperation handle waste gas simultaneously again, and under the normal operating condition, exhaust-gas treatment efficiency is higher.

5) Through the mode that sets up the baffle in the integration box forms waste gas inlet channel, compare in traditional gas-supply pipeline, waste gas inlet channel itself has bigger area of ventilating, after waste gas gets into waste gas inlet channel via the waste gas air inlet, the area of flow of waste gas increases, waste gas inlet channel buffers the air current of waste gas, reduce the atmospheric pressure of waste gas to a certain extent, avoid waiting to handle waste gas and lead to the unsmooth problem of waste gas treatment unit air inlet because of the air current disorder in waste gas inlet channel, the improvement of air current disorder problem also avoids the problem of waste gas inlet channel internal vibration because of the turbulent flow, the problem of air current noise is effectively improved in the operation. Meanwhile, the ventilation structure formed by matching the integrated box and the partition plate also has higher structural strength and rigidity, has an effective inhibition effect on vibration caused by airflow, and can meet ventilation use requirements without additionally arranging a ventilation pipeline in the integrated box, so that the use amount of whole parts of the treatment system is reduced, the manufacturing cost is reduced, and the silence of operation is improved.

6) The air inlet and the air outlet of the waste gas treatment unit are respectively positioned at two opposite sides of the waste gas treatment unit, the distribution mode of the waste gas inlet channel and the air outlet channel conforms to the gas flow mode of the waste gas treatment unit, the design mode can reduce the turning of the air flow in the waste gas treatment unit, avoid the kinetic energy loss when the air flow turns, reduce the energy consumption for providing the circulation kinetic energy for the air flow, simultaneously maintain the smoothness of the air circulation and avoid the influence on the treatment efficiency due to the too slow speed of the air flow.

Drawings

Fig. 1 is a plan view showing an internal structure of a VOCs exhaust gas treatment system according to an embodiment of the present invention, wherein a first horizontal direction corresponds to a front-rear direction and a second horizontal direction corresponds to a left-right direction, in addition, solid arrows are implemented to indicate a flow direction of untreated VOCs exhaust gas, open arrows are implemented to indicate a flow direction of a dischargeable gas obtained after purification, and dotted open arrows indicate a flow direction of cool air;

FIG. 2 is a perspective view of the internal structure of a VOCs exhaust gas treatment system according to an embodiment of the present invention, wherein the top and front side panels of the integrated box are not shown;

FIG. 3 is a perspective view of the internal structure of a VOCs exhaust gas treatment system according to an embodiment of the present invention, wherein the top plate, front side plate, right side plate and valve body partition plate of the left control valve group of the integrated box are not shown;

FIG. 4 is a perspective view of the internal structure of a VOCs exhaust gas treatment system according to an embodiment of the present invention, wherein the top plate, front side plate, right side plate, left side control valve block and left side partition plate of the integrated box are not shown;

FIG. 5 is a side view of the internal structure of an exhaust treatment unit employed in an embodiment of the present invention;

FIG. 6 is a schematic diagram of modular communication of an exhaust treatment unit employed in an embodiment of the present invention.

Reference numerals illustrate:

1. An integration box; 101. an exhaust gas intake passage; 1011. an exhaust gas inlet; 102. an isolation chamber; 1021. a receiving chamber; 103. an air outlet channel; 104. a service passage; 105. a refrigeration channel; 1051. a cool air inlet; 1052. a cool air outlet; 110. a partition plate; 120. an outer layer safety door;

2. An isolation unit; 210. isolating the louvers;

3. an exhaust gas treatment unit; 310. a housing; 320. fire control skylight; 330. a pre-filter module; 331. a first filter; 332. a second filter; 333. a first bypass pipe; 334. a first on-off valve; 335. a second bypass pipe; 336. a second on-off valve; 340. a purification module;

4. A control valve group; 410. a first valve body; 420. a second valve body; 430. a third valve body; 440. a valve body isolation plate; 450. a sealing plate; 401. a spacing space;

5. a detection unit; 510. a temperature detector; 520. a smoke detector; 530. a first pressure detector; 540. a second pressure detector; 550. a third pressure detector;

6. Fire control shower nozzle.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present invention, unless explicitly defined otherwise, references to orientation words such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the specific scope of the invention.

In the claims, specification and drawings of the present invention, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present invention, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Referring to fig. 1 to 4, a system for treating exhaust gas of VOCs according to the present invention will now be described. The VOCs waste gas treatment system comprises an integrated box 1, an isolation unit 2, a waste gas treatment unit 3, a control valve group 4 and a detection unit 5; the inside of the integration box 1 is provided with an exhaust gas inlet channel 101, an isolation cavity 102 and an air outlet channel 103 which are distributed along a first horizontal direction, the exhaust gas inlet channel 101 extends along a second horizontal direction, two ends of the exhaust gas inlet channel extend along the second horizontal direction, an exhaust gas inlet 1011 is formed on the side wall of the integration box 1 respectively, an exhaust port is formed on one side of the air outlet channel 103 away from the isolation cavity 102, and the first horizontal direction is perpendicular to the second horizontal direction; the isolation unit 2 is arranged in the isolation cavity 102 and divides the isolation cavity 102 into two accommodation cavities 1021 distributed along the second horizontal direction, and the side wall of each accommodation cavity 1021 is provided with a maintenance safety door; the two exhaust gas treatment units 3 are arranged in the corresponding accommodating chambers 1021, the air inlets of the exhaust gas treatment units 3 face the exhaust gas inlet channel 101 and are communicated with the exhaust gas inlet channel 101, and the air outlets face the air outlet channel 103 and are communicated with the air outlet channel 103; the two control valve groups 4 are arranged in the exhaust gas inlet channel 101, the two control valve groups 4 are respectively corresponding to the air inlets of the two exhaust gas treatment units 3, the control valve groups 4 have a conducting state for enabling the air inlets of the exhaust gas treatment units 3 to be communicated with the exhaust gas inlet channel 101 and also have a blocking state for enabling the air inlets of the exhaust gas treatment units 3 to be blocked with the exhaust gas inlet channel 101; the detecting unit 5 is disposed in the accommodating chamber 1021 and is capable of detecting the working state of the corresponding exhaust gas treatment unit 3, and the detecting unit is connected with the control valve set 4 in a communication manner.

In the present embodiment, the exhaust gas inlet passage 101, the isolation chamber 102 and the outlet passage 103 are each formed by being isolated by the partition plate 110 provided in the integrated box 1, and the specific configuration of the partition plate 110 is related to the specific design configuration of the exhaust gas inlet passage 101, the isolation chamber 102 and the outlet passage 103, which is not limited only herein. Wherein, welded fastening is between baffle 110 and the corresponding side wall of integration box 1, guarantees the leakproofness and the joint strength of connection.

In this embodiment, in order to maintain the circulation of the gas in the VOCs exhaust gas treatment system, the air flow needs to be powered by the induced air device, for example, an induced air fan may be disposed at the exhaust gas inlet 1011, the exhaust gas treatment unit 3 (on the inlet side or the outlet side of the exhaust gas treatment unit 3), and the exhaust port.

In this embodiment, the communication connection between the detection unit 5 and the control valve set 4 may be implemented by an industrial personal computer, a programmable logic controller, or other devices. For example, the detecting unit 5 feeds back the detected state data to the industrial personal computer, the industrial personal computer compares the state data with the standard state value, if the state data does not conform to the standard state value, the operation is judged to be abnormal, an abnormal state signal is generated, and the control valve group 4 in the open state is switched to the closed state according to the abnormal state signal.

Compared with the prior art, the VOCs waste gas treatment system provided by the embodiment has the following beneficial effects:

1) Under the premise of ensuring the exhaust gas inlet and the treated gas exhaust requirements (namely, the exhaust gas inlet channel 101 and the exhaust gas outlet channel 103 are arranged), the isolation cavity of the integration box 1 isolates the two exhaust gas treatment units 3, so that the two exhaust gas treatment units 3 are prevented from being directly exposed to the external environment, even if the leakage event occurs in the exhaust gas treatment units 3, untreated exhaust gas can leak into the isolation cavity 102 instead of directly leaking into the external environment to cause large-area pollution, and the use safety can be improved. Meanwhile, the integrated box 1 also forms a sound insulation structure outside the waste gas treatment unit 3, so that noise generated in the operation process of the waste gas treatment unit 3 is isolated, and the silence of the operation is improved; for the waste gas treatment unit 3, the integrated box 1 also has the effect of improving the protection level, effectively avoids the damage of sun, water spraying and external gas to the waste gas treatment unit 3, improves the overall operation stability of the treatment system, prolongs the service life and reduces the maintenance cost.

2) The isolation unit 2 separates the isolation cavity into two mutually independent accommodating chambers 1021, if one of the exhaust gas treatment units 3 fails, the mutually independent arrangement between the two accommodating chambers 1021 realizes the isolation of failure equipment and normal equipment, avoids that the operation of the normal exhaust gas treatment units 3 is influenced by the failure (such as gas leakage) to cause more serious safety accidents, realizes the mutual isolation of the normal equipment and the failure equipment, and ensures the safety of maintenance operation.

3) The detection unit 5 monitors the running state of the exhaust gas treatment unit 3 in real time, if the running state of one of the exhaust gas treatment units 3 is abnormal, and when a safety accident is possibly caused, the detection unit 5 can rapidly communicate with the corresponding control valve group 4, so that the control valve group 4 is rapidly closed, serious equipment damage and even safety accidents caused by introducing exhaust gas into the fault exhaust gas treatment unit 3 are avoided, the intelligent degree and the response speed of running monitoring are improved, and the effects of stopping damage in time and improving the running safety are achieved.

4) Because in VOCs exhaust-gas treatment system, all be equipped with waste gas air inlet 1011 in the both sides of integration box 1, the air inlet quantity is more, and the mode that two sides set up makes the air inlet process of both sides waste gas not have the interference each other, and the air inlet process is steady, and the air input of waste gas is bigger for traditional processing system, and two exhaust-gas treatment units 3 of cooperation handle waste gas simultaneously again, and under the normal operating condition, exhaust-gas treatment efficiency is higher.

5) Through set up the mode of baffle 110 in integration box 1 and form waste gas inlet channel 101, compare in traditional gas-supply pipeline, waste gas inlet channel 101 itself has bigger area of ventilating, after waste gas gets into waste gas inlet channel 101 via the waste gas air inlet, the flow area increase of waste gas, waste gas inlet channel 101 buffers the air current of waste gas, reduce the atmospheric pressure of waste gas to a certain extent, avoid the waste gas that waits to handle because of the air current disorder leads to the unsmooth problem of waste gas treatment unit 3 air inlet in waste gas inlet channel, the improvement of air current disorder problem also avoids the problem of waste gas inlet channel 101 internal because of the turbulent flow leads to the vibration, the problem of air current noise in the operation process is effectively improved. Meanwhile, the ventilation structure formed by matching the integrated box 1 with the partition plate 110 also has higher structural strength and rigidity, has an effective inhibition effect on vibration caused by airflow, and can meet ventilation use requirements without additionally arranging a ventilation pipeline in the integrated box 1, so that the use amount of whole parts of a treatment system is reduced, the manufacturing cost is reduced, and the quietness of operation is improved.

6) The air inlet and the air outlet of the waste gas treatment unit 3 are respectively positioned at two opposite sides of the waste gas treatment unit 3, the distribution mode of the waste gas inlet channel 101 and the air outlet channel 103 conforms to the gas flow mode of the waste gas treatment unit 3, the design mode can reduce the turning of the air flow in the waste gas treatment unit 3, avoid the kinetic energy loss during the turning of the air flow, reduce the energy consumption for providing the circulation energy for the air flow, simultaneously maintain the smoothness of the air circulation and avoid the influence on the treatment efficiency due to the too slow speed of the air flow.

In some embodiments, the exhaust gas inlet 1011 is located at the upper part of the exhaust gas inlet channel 101, and the inlet of the exhaust gas treatment unit 3 corresponds to the lower part of the exhaust gas inlet channel 101, as shown in fig. 2 to 4, wherein the round port located at the front side of the exhaust gas treatment unit 3 shown in fig. 3 and 4 is the inlet thereof. The traditional gas transmission mode is generally to directly introduce VOCs gas into the waste gas treatment equipment through a pipeline, and the greater the density of the VOCs gas, the greater the power consumed by the maintenance gas provided by the air inducing equipment to enter the waste gas treatment equipment at a certain flow rate. In this embodiment, the exhaust gas inlet 1011 is placed at a high position, under the action of gravity, VOCs gas can be accumulated in the lower part of the exhaust gas inlet channel 101 after entering from the exhaust gas inlet 11, and the continuously accumulated VOCs gas can gradually raise the air pressure in the lower part of the exhaust gas inlet channel 101, even if the flow rate of the VOCs gas in the exhaust gas inlet channel 101 is not very high, the VOCs gas can smoothly enter the air inlet of the exhaust gas inlet channel 101 on the premise that the subsequent VOCs gas is continuously introduced, and this embodiment does not need to keep the VOCs gas at a high flow rate, so that the energy consumption of the induced draft device can be properly reduced, and the promotion effect is played for reducing the cost of the overall operation of the system.

In some embodiments, a gas detector is disposed in each of the accommodating chambers 1021, and the side walls of the accommodating chambers 1021 are formed with a pumping hole, the pumping hole is connected with a pumping pipeline, the gas outlet end of the pumping pipeline is communicated with the exhaust gas inlet channel 101, and the gas detector is in communication connection with a pumping pump on the pumping pipeline. If one of the exhaust gas treatment units 3 fails and leaks, the gas detector detects that exhaust gas is generated in the accommodating chamber 1021, the operation of the air pump is controlled, the untreated exhaust gas is pumped into the exhaust gas inlet channel 101 again through the air pumping pipeline, and the exhaust gas enters the exhaust gas treatment unit capable of working normally along with the flow of the exhaust gas, so that the exhaust gas is prevented from accumulating in the accommodating chamber 1021 to affect subsequent overhaul operation, and the operation safety of operators is ensured.

On this basis, maintenance emergency exit is provided with the electromagnetic lock, and the electromagnetic lock is connected with gas detector communication, but when gas detector detected VOCs gas concentration and was less than safe threshold value, the electromagnetic lock just can be unlocked, and preceding unanimous keeping locking state avoids the operating personnel to get into the holding cavity under the too high condition of VOCs gas concentration.

In some embodiments of the control valve block 4, the control valve block 4 includes a first valve body 410, a second valve body 420, a third valve body 430, and a valve body spacer 440, as shown in fig. 1-4; the first valve body 410 and the second valve body 420 are arranged side by side along the first horizontal direction, and the edges of the first valve body 410 and the second valve body 420 are respectively connected with the side wall of the exhaust gas inlet channel 101 in a sealing way, wherein the first valve body 410 is adjacent to the exhaust gas treatment unit 3; the valve body partition plate 440 is provided on the downstream side of the first valve body 410 and the second valve body 420, and extends in the second horizontal direction, and a space 401 is formed between the valve body partition plate 440 and the air inlet of the exhaust gas treatment unit 3; the third valve body 430 is disposed at the downstream side of the space 401 and is respectively connected to the edge of the valve body partition plate 440 and the inner wall of the exhaust gas inlet channel 101 in a sealing manner; the first valve body 410, the second valve body 420 and the third valve body 430 are respectively connected in communication with the detection unit 5. The term "communication connection" is implemented by devices such as an industrial personal computer and a programmable logic controller, and the specific working principle is not described herein.

Taking the view of fig. 1 as an example, the operation of the control valve set 4 of this embodiment is illustrated:

1) In a normal operation state, the first valve body 410, the second valve body 420, and the third valve body 430 on both sides are kept in a fully opened state, and the exhaust gas from VOCs simultaneously enters the exhaust gas intake passage 101 from the exhaust gas intake ports 1011 on both left and right sides and can freely circulate in the exhaust gas intake passage 101, and then enters the two exhaust gas treatment units 3.

2) If the left exhaust gas treatment unit 3 fails and is required to be shut down for maintenance, the left second valve body 420 is kept open, but the left first valve body 410 and the third valve body 430 are closed, the space 401 becomes a closed space, and the exhaust gas entering from the left exhaust gas inlet 1011 flows to the right through the left second valve body 420 and then enters the right exhaust gas treatment unit 3.

3) If it is necessary to control the exhaust gas flowing in of the two exhaust gas treatment units 3, the first valve body 410 on the left and right sides is kept in an open state, and the second valve body 420 and the third valve body 430 on the left and right sides are kept in a closed state, at this time, the exhaust gas flowing in from the left exhaust gas inlet 1011 directly enters the left exhaust gas treatment unit 3, the exhaust gas flowing in from the right exhaust gas inlet 1011 directly enters the right exhaust gas treatment unit 3, and the exhaust gas on the left and right sides do not flow through each other.

4) If the exhaust gas flowing-in amount of the left exhaust gas treatment unit 3 needs to be smaller than that of the right, the first valve body 410 and the second valve body 420 on the left are kept in an opened state, the third valve body 430 is kept in a closed state, the first valve body 410, the second valve body 420 and the third valve body 430 on the right are all opened, and then the left-side inlet exhaust gas partially flows into the left exhaust gas treatment unit 3, and the rest of the exhaust gas enters the right exhaust gas treatment unit 3 together with the right-side inlet exhaust gas.

5) If the left exhaust gas inlet 1011 area needs to be overhauled, the first valve body 410 and the second valve body 420 on the left side are controlled to be kept closed, the third valve body 430 is controlled to be kept open, the first valve body 410, the second valve body 420 and the third valve body 430 on the right side are all opened, and the exhaust gas entering from the right exhaust gas inlet 1011 is prevented from flowing to the left exhaust gas inlet 1011, but the exhaust gas can still enter the two exhaust gas treatment units 3.

Of course, the control valve groups 4 on both sides can also be used in combination and exhibit more use states, which are not listed here.

More specifically, the first, second and third valve bodies 410, 420 and 430 are shutter type valve bodies, and the flow rate of gas can be controlled by controlling the opening and closing degree of shutter blades. For example, the first valve body 410 has a valve body frame fixed in the exhaust gas intake passage 101, a plurality of valve body shutters disposed in the valve body frame, and a valve body driving assembly for controlling the plurality of valve body shutters to open and close synchronously, and the valve body driving assembly is communicatively connected with the detecting unit.

On the basis of the above-described embodiment, referring to fig. 2 to 4, the top portions of the first, second and third valve bodies 410, 420 and 430 are spaced apart from the top wall of the exhaust gas intake passage 101 by a distance, and a sealing plate 450 is provided at a spaced position such that the ventilation areas of the first, second and third valve bodies 410, 420 and 430 cover the middle lower portion of the exhaust gas intake passage 101.

In some embodiments, the two side walls of the isolation chamber 102 and the corresponding side walls of the integration box 1 form the service channels 104 respectively, as shown in fig. 2 to 4, the two service channels 104 are distributed along the second horizontal direction and are located between the exhaust gas inlet channel 101 and the exhaust gas outlet channel 103, the corresponding side walls of the integration box 1 are provided with outer safety doors 120, and an operator needs to open the outer safety doors 120 into the service channels 104 first, and then can open the service safety doors into the accommodating chamber 1021 in the service channels 104. The maintenance channel 104 forms a protective space outside the isolation cavity 102, so that the protection of the waste gas treatment unit 3 in the isolation cavity 102 is enhanced, the sound insulation effect of the integrated box 1 is enhanced, and the silence of the system operation is improved.

On the basis of the above embodiment, referring to fig. 1 to 4, a cooling channel 105 isolated from the service channel 104 is formed above the service channel 104, a cool air inlet 1051 of the cooling channel 105 is formed on a side wall of the integrated box 1 and is communicated with external cooling equipment (such as an air conditioner), a cool air outlet 1052 of the cooling channel 105 is formed on a side wall of the cooling channel 105 adjacent to the accommodation chamber 1021 and is located above the exhaust gas treatment unit 3, and the detection unit 5 includes a temperature detector 510 for detecting the operating temperature of the exhaust gas treatment unit 3. If the temperature detector 510 detects that the working temperature of the exhaust gas treatment unit 3 exceeds a preset high value, the industrial personal computer judges that the exhaust gas treatment unit 3 needs to be cooled, and the industrial personal computer controls the refrigeration equipment to send cold gas to the cold gas inlet 1051; the cold air enters the refrigerating channel 105 and then flows transversely for a certain distance, and then is poured into the accommodating chamber 1021 from the cold air outlet 1052, so that the refrigerating and cooling of the waste gas treatment unit 3 are realized, and the waste gas treatment unit 3 can normally operate. The space at the upper part of the overhaul channel 104 is used for arranging the refrigerating channel 105, so that the space utilization rate is high, meanwhile, the mode of feeding cool air from top to bottom is realized, and the refrigerating effect is better.

In some embodiments of the cold air outlet 1051, the cold air outlet 1051 includes a plurality of air outlet holes distributed in a rectangular array, as shown in fig. 1-4. The plurality of air outlet holes are used for distributing the cold air, so that the uniformity of the cold air circulation is maintained, the reliability of refrigeration is further improved, and the phenomenon that the local temperature of the waste gas treatment unit 3 is too low is avoided.

In some embodiments of the cooling channels 105, referring to fig. 1 to 4, the width of the cooling channels 105 gradually decreases along the direction of the cold air flowing, and the air pressure of the cold air flowing gradually increases, so as to facilitate the smoothness of the cold air flowing out.

In some embodiments, the isolation unit 2 may have a structure as shown in fig. 2 to 4, where the isolation unit 2 includes an isolation sealing frame fixedly connected to the accommodating chamber, a plurality of isolation shutters 210 rotatably disposed in the isolation sealing frame, and an isolation shutter driving assembly for controlling the isolation shutters 210 to rotate synchronously, and the isolation shutter driving assembly is in communication with the temperature detector. The isolation unit 2 of the present embodiment can realize the switching of the on-off relationship between the two accommodating chambers 1021 through the rotation of the isolation shutter 210, for example, 1) in a normal working state, if the two exhaust gas treatment units 3 detect that the temperature is too high, the refrigeration channels 105 on both sides both convey cold air to the corresponding accommodating chambers 1021, and the cold air can circulate between the two accommodating chambers 1021, which is beneficial to improving the cooling efficiency and reducing the energy consumption of the refrigeration equipment; 2) If one of the exhaust treatment units 3 is required to be shut down due to a failure, the isolation louver 210 is kept in a closed state, and the two accommodation chambers 1021 are kept isolated from each other. The isolation unit 2 of this implementation forms the structure of shutter type, and the ventilation area is big under the open state, and the circulation smoothness nature is ensured, can guarantee certain leakproofness again under the closed state, and overall structure is simple, and occupation space is few in the second horizontal direction, also can guarantee the reliability of use simultaneously.

More specifically, the isolation shutter driving assembly in this embodiment includes a driving motor, a vertically arranged driving screw, and a driving link; the driving screw is fixedly connected to the output shaft of the driving motor, the driving connecting rods are arranged in one-to-one correspondence with the isolation louvers 210, one end of each driving connecting rod is rotationally connected to the corresponding isolation louver 210, and the connecting position is arranged in a staggered manner with the swinging rotating shaft of the isolation louver 210; the driving screw is sleeved with nut seats corresponding to the driving connecting rods one by one, and the other ends of the driving connecting rods are connected with the corresponding nut seats in a rotating mode. When in use, the driving screw rod rotates and drives the nut seat to move up and down, and the nut seat pushes and pulls the nut seat driving connecting rod in the process of moving up and down, so that the isolating louver 210 is driven to rotate through the driving connecting rod.

Referring to fig. 1, in some embodiments, a fire-fighting nozzle 6 is disposed above the accommodating chamber 1021, the fire-fighting nozzle 6 is connected with an external fire-extinguishing agent source through a pipeline, the spraying direction of the fire-fighting nozzle 6 faces the exhaust gas treatment unit 3, the detection unit 4 includes a smoke detector 520 for detecting smoke in the accommodating chamber 1021, and the fire-fighting nozzle 6 is in communication connection with the smoke detector 520. If the smoke detector 520 detects that smoke exists in the accommodating chamber 1021, the industrial personal computer controls the fire-fighting nozzle 6 to spray carbon dioxide or other fire extinguishing agents, so that serious fire is avoided. It should be noted that, in the case where the presence of smoke in the accommodating chambers 1021 is detected, it is also necessary to keep the two accommodating chambers 1021 in a state of being isolated from each other (i.e., to close the isolation unit 2), so as to avoid affecting the safety of one exhaust gas treatment unit 3 in the event of a fire on the other exhaust gas treatment unit 3.

In some embodiments, the exhaust gas treatment unit 3 may adopt a structure as shown in fig. 5, where the exhaust gas treatment unit 3 includes a housing 310, a fire skylight 320 disposed at the top of the housing 310, and a pre-filter module 330 and a purification module 340 sequentially communicated in the direction of gas flow and disposed in the housing 310, the air inlet of the pre-filter module 330 is communicated with the exhaust gas inlet channel 101, the air outlet of the purification module 340 is communicated with the air outlet channel 103, a smoke detector 520 is disposed in the housing 310, so as to rapidly and intuitively monitor smoke, and the smoke detector 520 is also in communication connection with an on/off controller of the fire skylight 320. Among other things, implementations of the on-off controller for fire sunroof 320 include, but are not limited to, a sunroof magnetic lock. The shell 310 realizes the integrated arrangement of the pre-filter module 330 and the purification module 340, so that the waste gas treatment unit 3 forms a modularized integral structure, and the shell 310 is only required to be disassembled and assembled in the isolation cavity 102 during on-site assembly and disassembly, so that the assembly and disassembly process is more convenient; meanwhile, the fire skylight 320 can ensure that the fire extinguishing agent can pour into the shell 310, so that fire can be effectively extinguished, and the use safety is ensured.

In this embodiment, the side wall of the housing 310 is further provided with a vent, and under the condition that the fire skylight 320 is not opened, cool air can enter the housing 310 through the vent to effectively cool the pre-filter module 330 and the purification module 340; meanwhile, the ventilation opening can also exhaust gas when the gas leakage occurs in the pre-filtering module 330, the purifying module 340 or the connecting pipeline, so that the excessive air pressure in the shell 310 is avoided, the leaked waste gas is conveniently pumped out by the pumping pipeline, and the gas residue in the shell 310 is avoided.

Based on the above embodiment, referring to fig. 5, the top wall of the housing 310 is disposed at an upper and lower interval with the pre-filter module 330 and the purification module 340, to provide a space for the fire skylight 320 to turn over, and to facilitate the installation of the temperature detector 510 and the smoke detector 520; the side wall of the housing 310 is provided with an access opening, a detachable cover at the access opening is provided with an access cover plate, the pre-filter module 330 is detachably arranged in the housing 310, and the purification module 340 is also detachably connected to the housing 310.

In some embodiments of the pre-filter module 330, the pre-filter module 330 includes a first filter 331 and a second filter 332 that are sequentially communicated in the direction of gas flow, as shown in fig. 5 and 6, where the air inlet of the first filter 331 is communicated with the exhaust air inlet channel 101, and the air outlet of the second filter 332 is communicated with the air inlet of the purification module 340. The pre-filter module 330 realizes two-stage filtration to the waste gas, can effectively filter the dust particle in the waste gas, avoids the excessive influence of particulate matters on subsequent effective purification.

On the basis of the above embodiment, referring to fig. 6, the pre-filtering module 330 further includes a first bypass pipe 333, an inlet of the first bypass pipe 333 is connected to an air inlet side of the first filter 331, an inlet of the first bypass pipe 333 is connected to an air outlet side of the first filter 331, and a first on-off valve 334 is further disposed on the first bypass pipe 333; the detecting unit 5 further includes a first pressure detector 530 and a second pressure detector 540, where the first pressure detector 530 is disposed on the air inlet side of the first filter 331, the second pressure detector 540 is disposed on the air outlet side of the first filter 331, and the first pressure detector 530 and the second pressure detector 540 are respectively connected with the first on-off valve 334 in a communication manner. In the normal operation state, the first on-off valve 334 maintains the closed state of the first bypass pipe 333, and the exhaust gas directly enters the first filter 331; if the difference between the value P1 detected by the first pressure detector 530 and the value P2 detected by the second pressure detector 540 is too large, the first filter 331 is blocked, the exhaust gas circulation is not smooth, and the filtering structure needs to be cleaned, at this time, the industrial personal computer controls the first on-off valve 334 to switch to a state that the air inlet of the first filter 331 is closed, but the first bypass 333 is opened, the exhaust gas is directly led into the second filter 332, the exhaust gas treatment unit 3 can still maintain the working state, and the purpose of deferred maintenance is achieved; if the difference between P1 and P2 is recovered within the normal range, the industrial personal computer controls the first on-off valve 334 to recover to a state where the air inlet of the first filter 331 is opened, but the first bypass pipe 333 is closed. In particular, the first on-off valve 334 is a three-way valve disposed at the inlet pipe of the first bypass 333 and the first filter 331.

Still further, referring to fig. 2, the pre-filter module 330 further includes a second bypass pipe 335, an inlet of the second bypass pipe 335 is connected to an inlet side of the second filter 332, an inlet of the second bypass pipe 335 is connected to an outlet side of the second filter 332, an inlet of the second bypass pipe 335 and an outlet of the first bypass pipe 333 are connected to the inlet side of the second filter 332 through a second on-off valve 336, and the second on-off valve 336 is a four-way valve; the detection unit 5 further includes a third pressure detector 550, the third pressure detector 550 being disposed on the outlet side of the second filter 332, the second pressure detector 540 and the third pressure detector 550 being in communication with the second on-off valve 336.

In the normal operation state, the second on-off valve 336 maintains the closed state of the second bypass pipe 335, and the exhaust gas enters the second filter 332; if the difference between the value P2 detected by the second pressure detector 540 and the value P3 detected by the third pressure detector 550 is too large, the second filter 332 is indicated to be blocked, the exhaust gas flows smoothly, and the filtering structure needs to be cleaned, at this time, the industrial personal computer controls the second on-off valve 336 to switch to a state that the air inlet of the second filter 332 is closed, but the second bypass pipe 335 is opened, the exhaust gas passes through the second filter 332 and is led into the purification module 340, the exhaust gas treatment unit 3 can still maintain the working state, and the purpose of deferred maintenance is achieved; if the difference between P2 and P3 is restored to be within the normal range, the industrial personal computer controls the second on-off valve 336 to be restored to a state in which the air inlet of the second filter 332 is opened, but the second bypass pipe 335 is closed.

It should be noted that, the first on-off valve 334 and the second on-off valve 336 may be used in combination, for example:

1) In the state that the first filter 331 is normal but the second filter 332 needs to be cleaned, the first on-off valve 334 is in a state that the air inlet of the first filter 331 is opened but the first bypass pipe 333 is closed; meanwhile, the second on-off valve 336 is in a state of closing the air inlet of the second filter 332, the air outlet of the first filter 331 is communicated with the inlet of the second bypass pipe 335, and the exhaust gas filtered through the first filter 331 passes through the second filter 332 and enters the purification module 340.

2) If the first filter 331 and the second filter 332 need to be cleaned, the air inlet of the first filter 331 of the first on-off valve 334 is closed, but the first bypass 333 is opened, and meanwhile, the air outlet of the first filter 331 and the air inlet of the second filter 332 are both closed, the outlet of the first bypass 333 is communicated with the inlet of the second bypass 335, and the exhaust gas passes through the first filter 331 and the second filter 332 and directly enters the purification module 340.

In some embodiments, the air outlet side of the purification module 340 is further provided with an induced draft fan, so that the exhaust of the treated exhaust gas can be accelerated by forming a negative pressure on the air outlet side of the purification module 340, and the exhaust gas to be treated is powered by the exhaust gas treatment unit 3.

In some embodiments of the first filter 331 and the second filter 332, the implementation of the first filter 331 and the second filter 332 includes, but is not limited to, an activated carbon adsorber, and the VOCs exhaust gas is adsorbed by the activated carbon adsorbent in the adsorption bed to primarily purify the gas, and the purified gas is discharged to the purification module 340. The active carbon absorber has high adsorption rate, low operation energy consumption, safety and reliability, is suitable for dangerous places with explosion, can recover the adsorbent, and is energy-saving and environment-friendly.

In some embodiments of the purification module, the implementation of the purification module 340 includes, but is not limited to, the following:

1) The UV purifier irradiates waste gas with special high-energy high-ozone UV light beams to change the molecular structure of the waste gas, so that organic or inorganic high-molecular waste gas compound molecular chains are degraded and converted into low-molecular compounds under the irradiation of the high-energy UV light beams. The UV purifier has small occupied area, lower running cost and lower equipment investment.

2) Chemical or physical absorbers, one or more components of the exhaust gas are dissolved in a selected liquid absorbent which has a high affinity for the absorbing component and a low volatility and which is less volatile, and the absorbent is saturated and then desorbed by heating and then cooled for reuse. The method is suitable for low-temperature, medium-high-concentration waste gas, can selectively absorb the waste gas such as hydrogen sulfide and the like, has simple process flow, and does not need additional steam or additional other heat sources.

3) The thermal burner is used for raising the temperature of the waste gas to the temperature of the combustible gaseous pollutant, so that the waste gas is subjected to the process of full oxidative decomposition, and the thermal burner is suitable for purifying waste gas with low content of combustible organic substances, and has the advantages of high heat efficiency, long service life of equipment, aging resistance and corrosion resistance in the combustion and purification treatment technology.

4) The plasma decomposer bombards pollutant molecules with a large amount of energy-carrying electrons generated by the medium discharge under the action of an external electric field, and initiates a series of complex physical and chemical reactions, so that the pollutants are degraded and removed. The plasma decomposition method has the advantages of simple process, low consumption, energy saving, strong oxidation resistance of equipment materials, corrosion resistance and long service life, and can efficiently remove waste gas containing main pollutants such as volatile organic compounds, inorganic matters, hydrogen sulfide, ammonia gas and the like.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. A VOCs exhaust gas treatment system comprising:

the detection unit is arranged in the accommodating cavity and can detect the working state corresponding to the waste gas treatment unit, and the detection unit is in communication connection with the control valve group;

The control valve group comprises a first valve body, a second valve body, a third valve body and a valve body isolation plate; the first valve body and the second valve body are distributed side by side along a first horizontal direction, and edges of the first valve body and the second valve body are respectively connected with the side wall of the exhaust gas inlet channel in a sealing mode, wherein the first valve body is close to the exhaust gas treatment unit; the valve body isolation plate is arranged on the downstream side of the first valve body and the downstream side of the second valve body, extends along the second horizontal direction and forms a spacing space with the air inlet of the exhaust gas treatment unit; the third valve body is arranged on the downstream side of the interval space and is respectively in sealing connection with the edge of the valve body isolation plate and the inner wall of the exhaust gas inlet channel; the first valve body, the second valve body and the third valve body are respectively in communication connection with the detection unit.

2. The VOCs exhaust gas treatment system according to claim 1, wherein two side walls of the isolation chamber and corresponding side walls of the integration box respectively form service passages, two service passages are distributed along the second horizontal direction and are located between the exhaust gas inlet passage and the exhaust gas outlet passage, and corresponding side walls of the integration box are provided with outer safety gates.

3. The VOCs exhaust gas treatment system according to claim 2, wherein a cooling channel is formed above the service channel, a cool air inlet of the cooling channel is provided on a side wall of the integrated tank, a cool air outlet of the cooling channel is provided on a side wall of the cooling channel adjacent to the accommodating chamber and above the exhaust gas treatment unit, and the detection unit comprises a temperature detector for detecting an operating temperature of the exhaust gas treatment unit.

4. The VOCs exhaust gas treatment system according to claim 3 wherein said cool air outlet comprises a plurality of air outlet holes distributed in a rectangular array.

5. The VOCs exhaust gas treatment system according to claim 3 wherein said refrigeration path is tapered in width in the direction of cool air flow.

6. The VOCs exhaust treatment system according to claim 3 wherein the isolation unit comprises an isolation sealing frame fixedly connected to the receiving chamber, a plurality of isolation louvers rotatably disposed in the isolation sealing frame, and an isolation louver driving assembly controlling the isolation louvers to rotate synchronously, the isolation louver driving assembly being in communication with the temperature detector.

7. The VOCs waste gas treatment system according to claim 1, wherein a fire nozzle is arranged above the accommodating chamber, the detection unit comprises a smoke detector for detecting smoke in the accommodating chamber, and the fire nozzle is in communication connection with the smoke detector.

8. The VOCs exhaust gas treatment system according to claim 7, wherein the exhaust gas treatment unit comprises a housing, a fire skylight provided at the top of the housing, and a pre-filter module and a purification module sequentially connected in a gas flow direction and provided in the housing, wherein an air inlet of the pre-filter module is connected to the exhaust gas inlet channel, an air outlet of the purification module is connected to the air outlet channel, and a smoke detector is provided in the housing and is also connected to an on-off controller of the fire skylight.

9. The VOCs exhaust treatment system according to claim 8 wherein said pre-filtration module comprises a first filter and a second filter in series communication along a gas flow direction, said first filter having an air inlet in communication with said exhaust gas inlet passage and said second filter having an air outlet in communication with said purification module air inlet.

10. The VOCs exhaust treatment system according to claim 9, wherein the pre-filtration module further comprises a first bypass pipe, an inlet of the first bypass pipe is connected to an air inlet side of the first filter, an inlet of the first bypass pipe is connected to an air outlet side of the first filter, and a first on-off valve is further provided on the first bypass pipe;