Waste gas treatment method and device for petroleum sewage system

Abstract

The invention relates to a waste gas treatment method and device for a petroleum sewage system, and belongs to the technical field of waste gas treatment. The device comprises a collecting mechanism, an input mechanism, a filtering mechanism and an output mechanism, the collecting mechanism is matched with a waste gas discharge outlet, and the first end of the input mechanism is connected with the collecting mechanism; the filtering mechanism comprises a first shell, a first filtering assembly, a second filtering assembly and a third filtering assembly, the first end of the first shell is connected with the second end of the input mechanism, the first filtering assembly is fixedly arranged on the first shell, the second filtering assembly is slidably arranged on the first shell, the third filtering assembly selectively communicates with the first shell, and the first shell is provided with a first output port; the third filtering assembly is provided with a second output port, and the second filtering assembly can slide to block the first output port and enable the third filtering assembly to be communicated with the first shell; the first output port and the second output port communicate with the output mechanism, and the output mechanism is connected with the combustor. The problem that it is difficult for a filtering device to guarantee the waste gas filtering effect and the waste gas conveying efficiency at the same time can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a waste gas treatment method and device for a petroleum sewage system. BACKGROUND

[0002] In the petrochemical industry, with the continuous expansion of production scale and the increasing environmental protection requirements, the treatment of waste gas generated by the petroleum sewage system becomes increasingly important. Effective waste gas treatment not only helps to reduce environmental pollution and protect the ecological environment, but also ensures the physical health of workers and the stable operation of production equipment.

[0003] At present, for the treatment of waste gas of the petroleum sewage system, a filter device with fixed structure and volume is usually used to intercept impurities and pollutants in the waste gas discharged from the discharge port through the filter layer, so as to achieve the purpose of preliminary purification of the waste gas, and then the waste gas with filtered dust and impurities is burned, and the waste gas is introduced into the burner for combustion, so that the harmful substances in the waste gas are decomposed and converted into relatively harmless substances at high temperature.

[0004] However, since the structure and volume of the filter device in the related art are fixedly arranged, when the waste gas discharge amount is large, it is difficult for the filter device to simultaneously ensure the filtering effect of the waste gas and the conveying efficiency of the waste gas. If the filtering effect of the waste gas is to be ensured, the conveying efficiency of the waste gas from the discharge port will be affected, causing accumulation of the waste gas at the discharge port, which may lead to an increase in the waste gas pressure at the discharge port, thereby affecting the safety of waste gas treatment; if the accumulation of the waste gas at the discharge port is to be reduced when the waste gas discharge amount is large, a relatively simple filter structure needs to be used to enable the waste gas to pass through quickly, but this will cause the filtering effect of the waste gas to decrease, leaving more dust, which adversely affects the safety of subsequent combustion treatment.

[0005] In the above related art, the filter device has the defect that it is difficult to simultaneously ensure the filtering effect of the waste gas and the conveying efficiency of the waste gas. SUMMARY

[0006] In order to improve the problem that the filter device is difficult to simultaneously ensure the filtering effect of the waste gas and the conveying efficiency of the waste gas, the present application provides a waste gas treatment method and device for a petroleum sewage system.

[0007] In a first aspect, the waste gas treatment device for a petroleum sewage system provided by the present application adopts the following technical solution: The exhaust treatment device of the oil sewage system is arranged between the exhaust emission port of the oil sewage system and the burner for burning the exhaust gas, and comprises a collecting mechanism matched with the exhaust emission port and used for collecting the exhaust gas, an input mechanism, a filtering mechanism, and an output mechanism.

[0008] By adopting the technical scheme, the collecting mechanism cooperates with the exhaust emission port, so that the waste gas generated by the oil sewage system can be effectively collected, and the waste gas is prevented from being directly discharged into the environment. The input mechanism conveys the waste gas collected by the collecting mechanism to the filtering mechanism, so that the waste gas can smoothly enter the filtering link. In the filtering mechanism, the first filtering assembly is fixed in the first shell, and the second filtering assembly is slidable and the second filtering holes thereof are arranged in a staggered manner with the first filtering holes of the first filtering assembly. This arrangement can perform multi-stage filtering on the waste gas and improve the filtering effect. When the waste gas pressure increases, the second filtering assembly will slide away from the first filtering assembly under the action of the waste gas pressure. By increasing the distance between the first filtering assembly and the second filtering assembly, the disturbance effect is appropriately reduced, the waste gas is reduced in the filtering resistance, and the waste gas can maintain a relatively fast flow speed. Moreover, the movement of the second filtering assembly can simultaneously block the first output port and make the third filtering assembly communicate with the first shell. When the input amount of the waste gas is large, the waste gas path of the filtering process is prolonged, the filtering pressure is shared by the third filtering assembly, so that the filtering effect is ensured, the influence on the filtering effect is reduced, the rapid flow and conveying of the waste gas are realized, the waste gas pressure at the exhaust emission port is prevented from being too large, and the safety of the waste gas treatment is improved. The output mechanism conveys the waste gas filtered by the filtering mechanism to the burner, so that the waste gas can smoothly perform subsequent combustion treatment. The overall device can effectively solve the problem that the filtering effect and filtering efficiency of the waste gas are not easy to be simultaneously ensured when the input amount of the waste gas is large, and improve the safety of the waste gas treatment and the safety of the subsequent combustion treatment.

[0009] Optionally, the second filtering assembly comprises a support frame, a rear-end filtering layer and a front-end filtering layer. The support frame is provided with a plurality of second filtering holes. The rear-end filtering layer is provided with a plurality of protrusions corresponding to the second filtering holes. The rear-end filtering layer is arranged at the rear end of the support frame along the conveying direction of the waste gas. The protrusions are arranged to correspondingly extend into the second filtering holes. The front-end filtering layer is arranged at the front end of the support frame and is spaced apart from the protrusions.

[0010] By adopting the technical scheme, the support frame of the second filter assembly is provided with a plurality of second filter holes through which the exhaust gas passes, thereby preliminarily blocking large-particle impurities; the rear-end filter layer is laid at the rear end of the support frame, and the protrusions thereon correspondingly extend into the second filter holes, so that the exhaust gas passing through the second filter holes can be finely filtered, thereby improving the filtering precision; and through the cooperation of the protrusions and the second filter holes, the rear-end filter layer can be removed while reducing the residual dust in the second filter holes, thereby reducing the cleaning difficulty of the second filter holes; the front-end filter layer is arranged at the front end of the support frame and is spaced apart from the protrusions, so that the protrusions have a certain degree of freedom, thereby being able to swing to a certain extent, improving the cleaning effect of the second filter holes, and increasing the turbulence effect to compensate for the reduction in the filtering effect after the distance between the second filter assembly and the first filter assembly is increased.

[0011] Optionally, the filter mechanism comprises a reset assembly, the reset assembly comprising a first elastic member, a sliding block and a sliding slot, the sliding slot being arranged on the first housing, the sliding block being connected to the second filter assembly, the sliding block being slidingly connected to the sliding slot, a first end of the first elastic member being connected to a side of the sliding slot close to the second end of the first housing, and a second end of the first elastic member being connected to the sliding block.

[0012] By adopting the technical scheme, after the second filter assembly slides away from the first filter assembly due to the increase in the exhaust gas pressure, the reset assembly can restore the second filter assembly to the initial position. The sliding slot is arranged on the first housing to provide a sliding track for the sliding block, so that the sliding block can only slide along the path defined by the sliding slot; the sliding block is connected to the second filter assembly, so that when the second filter assembly moves under the action of the exhaust gas pressure, the sliding block will slide synchronously in the sliding slot; one end of the first elastic member is connected to the side of the sliding slot close to the second end of the first housing, and the other end is connected to the sliding block, so that the first elastic member will be elastically deformed to generate an elastic force during the sliding of the second filter assembly; when the exhaust gas pressure decreases, the elastic force of the first elastic member can push the sliding block to slide reversely in the sliding slot, thereby driving the second filter assembly to return to the initial position, achieving a good filtering effect and ensuring the continuous and stable operation of the device.

[0013] Optionally, the side of the first filter assembly close to the second filter assembly is provided with an electromagnet, and the side of the second filter assembly close to the first filter assembly is provided with a suction member, the electromagnet being used to attract the suction member close to the first filter assembly after being electrified, so that the second filter assembly quickly impacts the first filter assembly.

[0014] By adopting the above technical scheme, the electromagnet is arranged on the side of the first filter assembly close to the second filter assembly, and the suction accessory is arranged on the side of the second filter assembly close to the first filter assembly. When the exhaust flow is reduced and the second filter assembly needs to be reset, the electromagnet is powered on to generate a magnetic force to attract the suction accessory. Since the suction accessory is arranged on the second filter assembly, the second filter assembly can be quickly attracted to the first filter assembly under the action of the magnetic force and collide with the first filter assembly. This rapid collision can effectively shake off the impurity particles attached to the filter holes and surfaces of the first filter assembly and the second filter assembly, prevent the filter holes from being blocked by the long-term accumulation of the impurities, ensure the air permeability and filtering efficiency of the filter assembly, further ensure that the filtering effect is good when the input amount of the exhaust gas is large, avoid affecting the safety of the subsequent combustion treatment due to the decrease of the filtering effect, and help to keep the exhaust gas pressure at the exhaust gas discharge port stable and improve the safety of the exhaust gas treatment.

[0015] Optionally, the third filter assembly comprises a shielding plate, a second elastic member, a second housing and an auxiliary filter layer, the first housing is provided with an auxiliary outlet, the shielding plate is arranged between the second filter assembly and the second end of the first housing, the shielding plate comprises a shielding portion away from the second filter assembly and a communication portion close to the second filter assembly, the shielding plate is slidingly connected to the first housing, the shielding plate is used for selectively shielding the auxiliary outlet, the auxiliary outlet is shielded by the shielding portion, and the auxiliary outlet is opened by the communication portion, a first end of the second elastic member is connected to one end of the shielding plate away from the second filter assembly, and a second end of the second elastic member is connected to the second end of the first housing, the second filter assembly slides away from the first filter assembly, which can push the shielding plate to move to open the auxiliary outlet and block the first outlet, the second housing is arranged at the auxiliary outlet, the auxiliary filter layer is arranged at one end of the second housing close to the auxiliary outlet, the second housing is provided with the second outlet, and the second outlet is arranged above the auxiliary filter layer.

[0016] By adopting the above technical solution, when the exhaust gas input volume is large and the exhaust gas pressure increases, the second filter assembly slides away from the first filter assembly. During this process, the second filter assembly pushes the baffle, which, through its connecting portion, opens the auxiliary outlet of the first housing while simultaneously blocking the first outlet, allowing the exhaust gas to redirect its flow path and exit through the auxiliary outlet. A second elastic member connects the baffle to the second end of the first housing, acting as a buffer and assisting in the return of the baffle. The second housing, located above the auxiliary outlet, provides space for further filtration of the exhaust gas. The auxiliary filter layer within it further filters the exhaust gas after initial filtration by the first and second filter assemblies, improving the filtration efficiency and compensating for the reduced filtration efficiency caused by the increased distance between the second and first filter assemblies, resulting in poor flow turbulence. The second outlet, located above the auxiliary filter layer, ensures that fully filtered exhaust gas exits the second housing and is ultimately delivered to the burner via the output mechanism. This ensures effective filtration of the exhaust gas while preventing increased exhaust gas pressure at the exhaust outlet due to excessive exhaust gas input, thereby enhancing the safety of the exhaust gas treatment.

[0017] Optionally, the third filter assembly includes a piston and a first valve body, the piston is slidably arranged in the second shell, the piston is arranged above the auxiliary filter layer, so that the exhaust gas can be cached in the second shell, and the first valve body is used to discharge the gas from one end of the piston away from the auxiliary filter layer.

[0018] By adopting the above technical solution, the piston slides in the second shell and is located above the auxiliary filter layer. When the exhaust gas enters the second shell, it can slide upward as the amount of exhaust gas increases, and the internal space of the second shell is used to cache the exhaust gas, thereby avoiding damage to the device caused by excessive exhaust gas pressure; the first valve body can discharge the gas from the end of the piston away from the auxiliary filter layer, ensuring the stability of the gas pressure above the piston, maintaining normal sliding of the piston, ensuring the stable operation of the exhaust gas caching function, and improving the stability and safety of the operation of the exhaust gas treatment device.

[0019] 18. The air filter assembly of claim 17, wherein the air filter assembly comprises a first valve body, a second valve body and an exhaust member, the connecting pipe comprising a first communicating end, a second communicating end and a third communicating end, the first communicating end and the second communicating end both being connected to the first shell, the first communicating end being arranged at the rear end of the first filter assembly, the second communicating end being arranged between the first filter assembly and the second filter assembly, the third communicating end being connected to an end of the second shell away from the first shell, the valve body group being arranged at the third communicating end, and being used to selectively allow gas to flow from the first shell to the upper end of the second shell, the second shell being provided with an exhaust port, the exhaust member being connected to the exhaust port, and being used to exhaust air outward from the upper end of the second shell, the first shell being provided with an exhaust port, the exhaust port being provided with the second valve body, the second valve body being used to allow atmosphere to enter the first shell when the exhaust member is exhausting air, and the exhaust port and the third communicating end being both arranged above the highest position of the piston.

[0020] By adopting the above technical solution, the setting of the suction component can realize the cleaning of the filter mechanism and the adjustment of the airflow. The first connecting end of the connecting pipe is arranged at the rear end of the first filter component, and the second connecting end is arranged between the first filter component and the second filter component, which can lead out the gas at different positions in the first shell. The valve body is arranged at the third connecting end of the connecting pipe, which can selectively allow the gas to flow from the first shell to the upper end of the second shell, thereby realizing the airflow conduction between the two shells. The suction piece is connected to the suction port of the second shell, and sucks air outward from the upper end of the second shell to form airflow suction. The second valve body at the air vent of the first shell allows the atmosphere to enter the first shell when the suction piece sucks air, thereby maintaining the air pressure balance in the first shell. As a whole, it helps to enhance the filtering effect of the exhaust gas treatment device, reduce the blockage of the filter component, improve the stability and reliability of the operation of the device, and solve the problem that it is difficult to balance the filtering effect and efficiency when the exhaust gas input is large.

[0021] Optionally, the filtering mechanism includes a blocking component, the blocking component includes a connecting member and a blocking member, one end of the connecting member is connected to the second filtering component, and the blocking member is connected to the other end of the connecting member, and the blocking member is used to block the first output port when the second filtering component slides.

[0022] By adopting the above technical solution, the filter mechanism is equipped with a blocking assembly, wherein one end of the connector is connected to the second filter assembly and the other end is connected to the blocking member. When the second filter assembly slides under the influence of exhaust gas pressure, it can drive the blocking member to move, so that the blocking member can block the first output port. In this way, when the exhaust gas input volume is large and the exhaust gas pressure increases, the exhaust gas flow path can be timely changed to prevent the exhaust gas from being directly discharged through the first output port. This cooperates with other components to ensure the filtration effect and filtration efficiency, while also preventing excessive pressure at the exhaust gas outlet, ensuring the safety of exhaust gas treatment.

[0023] Optionally, a control mechanism is further included, the input mechanism includes an air suction pump and a detection member, the detection member is arranged on the collection mechanism, the air suction pump is used to connect the collection mechanism and the filtering mechanism, and the air suction pump and the detection member are both in communication connection with the control mechanism, so that the rotational speed of the air suction pump is adjusted according to the exhaust gas concentration measured by the detection member.

[0024] By adopting the technical scheme, the detection member is arranged on the collection mechanism, the concentration of the collected exhaust gas can be measured in real time, the air suction pump is connected with the collection mechanism and the filtering mechanism, and is used to transport the collected exhaust gas to the filtering mechanism, the control mechanism is in communication connection with the air suction pump and the detection member, can receive the exhaust gas concentration information measured by the detection member, and adjust the rotational speed of the air suction pump according to the information, so that the exhaust gas transportation amount is flexibly adjusted according to the actual exhaust gas concentration, the exhaust gas treatment efficiency and the pertinence are improved, and problems such as poor filtering effect or excessive exhaust gas pressure caused by improper exhaust gas input amount are avoided.

[0025] In a second aspect, the application provides a waste gas treatment method of a petroleum sewage system, which adopts the following technical scheme: A waste gas treatment method of a petroleum sewage system, using the waste gas treatment device of the petroleum sewage system, includes the following steps: waste gas collection, collecting waste gas through the collection mechanism; waste gas filtering, transporting the waste gas to the filtering mechanism through the input mechanism for filtering, and transporting the waste gas to the burner through the output mechanism; combustion treatment, performing combustion treatment on the filtered waste gas through the burner; spraying and cooling, spraying and cooling the waste gas after the combustion treatment through the reagent; catalytic oxidation, performing catalytic oxidation on the cooled waste gas through the catalyst; and adsorption treatment, removing impurities from the catalytically oxidized waste gas through adsorption, and then discharging.

[0026] By adopting the technical scheme, the waste gas discharged from the waste gas discharge port of the oil sewage system is collected by the collecting mechanism, so as to avoid pollution caused by direct discharge of the waste gas into the external environment, and then the collected waste gas is transported to the filtering mechanism by the input mechanism, the first filtering assembly, the second filtering assembly and the third filtering assembly in the filtering mechanism can perform multi-stage filtering on the waste gas, the filtering holes of the first filtering assembly and the second filtering assembly are arranged in a staggered manner, so as to enhance the filtering effect, when the pressure of the waste gas is relatively high, the second filtering assembly slides to block the first output port and makes the third filtering assembly communicate with the first shell, so as to further guarantee the filtering efficiency and prevent the pressure of the waste gas at the waste gas discharge port from being too high, thereby improving the safety of waste gas treatment; the filtered waste gas is transported to the burner by the output mechanism for combustion treatment, so as to convert the harmful substances in the waste gas into harmless substances; then the waste gas is sprayed and cooled by the medicament, so as to reduce the temperature of the waste gas and remove part of the impurities and harmful substances; then the waste gas is catalytically oxidized by the catalyst, so as to further decompose the harmful substances in the waste gas; finally, the waste gas is subjected to adsorption treatment, so as to adsorb the remaining small particles and harmful substances, thereby comprehensively and effectively treating the waste gas generated by the oil sewage system, and guaranteeing the effect and safety of waste gas treatment.

[0027] In summary, the present application at least has the following beneficial technical effects: The collecting mechanism cooperates with the waste gas discharge port, so as to effectively collect the waste gas generated by the oil sewage system and avoid direct discharge of the waste gas into the environment. The input mechanism transports the waste gas collected by the collecting mechanism to the filtering mechanism, so as to ensure that the waste gas can smoothly enter the filtering link. In the filtering mechanism, the first filtering assembly is fixed in the first shell, the second filtering assembly is slidable, and the second filtering hole of the second filtering assembly is arranged in a staggered manner with the first filtering hole of the first filtering assembly. This arrangement can perform multi-stage filtering on the waste gas and improve the filtering effect. When the pressure of the waste gas increases, the second filtering assembly will slide away from the first filtering assembly under the action of the waste gas pressure. By increasing the distance between the first filtering assembly and the second filtering assembly, the disturbance effect is appropriately reduced, the resistance of the waste gas to the filtering process is reduced, and the flow speed of the waste gas is maintained relatively high. Moreover, the movement of the second filtering assembly can simultaneously block the first output port and make the third filtering assembly communicate with the first shell. When the input amount of the waste gas is large, the waste gas path of the filtering process is extended, and the filtering pressure is shared by the third filtering assembly. Therefore, the filtering effect is guaranteed, the influence on the filtering effect is reduced, the rapid flow and transportation of the waste gas are realized, the pressure of the waste gas at the waste gas discharge port is prevented from being too high, and the safety of the waste gas treatment is improved. The output mechanism transports the waste gas filtered by the filtering mechanism to the burner, so as to ensure that the waste gas can smoothly undergo subsequent combustion treatment. The overall device can effectively solve the problem that the filtering effect and filtering efficiency of the waste gas are not easy to be simultaneously guaranteed when the input amount of the waste gas is large, and the safety of the waste gas treatment and the safety of the subsequent combustion treatment are improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a top view of the waste gas treatment device of the petroleum sewage system according to an embodiment of the present application.

[0029] Figure 2 yes Figure 1 Cross-section view at AA in the middle.

[0030] Figure 3 It is a cross-sectional view of the filtering mechanism of an embodiment of the present application.

[0031] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0032] Figure 5 This is a schematic diagram of the cooperation between the first filter component and the second filter component in an embodiment of the present application.

[0033] Figure 6 Schematic diagram of a shielding plate according to an embodiment of the present application.

[0034] Description of reference numerals: 1. Collection agency; 2. Input mechanism; 21. Air pump; 22. Detection component; 23. Third valve body; 3. Filter mechanism; 31, first housing; 311, first output port; 3111, fourth valve body; 312, auxiliary outlet; 313, vent; 32. First filter assembly; 321. Electromagnet; 33. Second filter assembly; 331. Support frame; 3311. Second filter hole; 3312. Support structure; 332. Rear filter layer; 3321. Protrusion; 333. Front filter layer; 334. Adsorbent; 34, third filter assembly; 341, second output port; 3411, fifth valve body; 342, shielding plate; 3421, shielding portion; 3422, connecting portion; 343, second elastic member; 344, second housing; 3441, air extraction port; 345, auxiliary filter layer; 346, piston; 347, first valve body; 35. Reset assembly; 351. First elastic member; 352. Slider; 353. Slide groove; 36. Air suction assembly; 361. Connecting pipe; 3611. First connecting end; 3612. Second connecting end; 3613. Third connecting end; 362. Valve assembly; 363. Second valve body; 364. Air extraction member; 365. Output pipe; 366. Filter block; 37. Blocking assembly; 371. Connecting piece; 372. Blocking piece; 4. Output mechanism. DETAILED DESCRIPTION

[0035] The application will be further described below in conjunction with the accompanying drawings. Figure 1 - The accompanying drawings Figure 6 The application will be further described below in conjunction with the accompanying drawings. In the embodiments, unless specifically defined and limited, “connection”, “connection” and “fixation” are understood in a broad sense, including fixed connection, detachable connection, connection forming an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through intermediaries, internal connection and interaction between two elements, which can be understood according to specific circumstances.

[0036] In the present application, unless specifically defined and limited, the first feature is “on” or “under” the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature therebetween. Moreover, in the description of the embodiments, the terms “on”, “under”, “left”, “right” and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise stated, the orientation words such as “inner” and “outer” used in the present application refer to the contour of the corresponding parts.

[0037] As shown in Figure 1 , Figure 2 and Figure 3 , the present application discloses a waste gas treatment device of an oil sewage system (hereinafter referred to as “device”). The device is arranged between the waste gas discharge port of the oil sewage system and the burner for burning waste gas, and comprises a collecting mechanism 1, an input mechanism 2, a filtering mechanism 3 and an output mechanism 4, for filtering waste gas.

[0038] As shown in Figure 2 , Figure 3 and Figure 4The collection mechanism 1 is matched with the exhaust emission port to collect the exhaust gas and avoid direct emission of the exhaust gas into the environment. The filtering mechanism 3 includes a first housing 31, a first filtering assembly 32, a second filtering assembly 33 and a third filtering assembly 34. The first end of the input mechanism 2 is connected to the collection mechanism 1, and the first end of the first housing 31 is connected to the second end of the input mechanism 2, so that the exhaust gas collected by the collection mechanism 1 is delivered to the filtering mechanism 3 through the input mechanism 2, and the exhaust gas can smoothly enter the filtering process. The structure of the first filtering assembly 32 is not limited and can be used to filter the exhaust gas. The first filtering assembly 32 is fixedly arranged in the first housing 31, and the second filtering assembly 33 is slidably arranged in the first housing 31. In the delivery direction of the exhaust gas, the second filtering assembly 33 is arranged at the front end of the first filtering assembly 32, and the first filtering hole arranged on the first filtering assembly 32 and the second filtering hole 3311 arranged on the second filtering assembly 33 are arranged in a staggered manner. This arrangement can perform multi-stage filtering on the exhaust gas and improve the filtering effect. The third filtering assembly 34 is arranged outside the first housing 31, and the third filtering assembly 34 selectively communicates with the first housing 31. The second end of the first housing 31 close to the second filtering assembly 33 is provided with a first output port 311, and the third filtering assembly 34 is provided with a second output port 341. The second filtering assembly 33 can slide away from the first filtering assembly 32 under the action of the exhaust gas pressure to block the first output port 311 and make the third filtering assembly 34 communicate with the first housing 31.

[0039] When the exhaust gas pressure is small, the filtered exhaust gas is discharged through the first output port 311. When the exhaust gas pressure increases, the second filtering assembly 33 slides away from the first filtering assembly 32 under the action of the exhaust gas pressure. By increasing the distance between the first filtering assembly 32 and the second filtering assembly 33, the disturbance effect is appropriately reduced, the resistance of the filtering process to the exhaust gas is reduced, and the flow speed of the exhaust gas can be maintained relatively fast. Moreover, the movement of the second filtering assembly 33 can block the first output port 311 and make the third filtering assembly 34 communicate with the first housing 31. Therefore, when the input amount of the exhaust gas is large, the exhaust gas path of the filtering process can be extended, the filtering pressure can be shared by the third filtering assembly 34, the filtering effect can be ensured without affecting the filtering effect, the rapid flow and delivery of the exhaust gas can be realized, the exhaust gas pressure at the exhaust emission port can be prevented from being too large, and the safety of the exhaust gas treatment can be improved.

[0040] As Figure 2 , Figure 3 and Figure 4The first output port 311 and the second output port 341 are both communicated with the output mechanism 4, and the output mechanism 4 is connected with the combustor. The output mechanism 4 delivers the exhaust gas filtered by the filtering mechanism 3 to the combustor, so as to ensure that the exhaust gas can be smoothly subjected to subsequent combustion treatment. The overall device can effectively solve the problem that the filtering effect and filtering efficiency of the exhaust gas are not easy to be simultaneously ensured when the input amount of the exhaust gas is large, and the safety of the exhaust gas treatment and the safety of the subsequent combustion treatment are improved. The output mechanism 4 can be an air suction pump.

[0041] As shown in Figure 2 , Figure 3 and Figure 4 , optionally, the second filtering assembly 33 comprises a support frame 331, a rear-end filtering layer 332 and a front-end filtering layer 333. The support frame 331 is provided with a plurality of second filtering holes 3311, which can allow the exhaust gas to pass through and play a role of preliminarily blocking large-particle impurities. The rear-end filtering layer 332 is provided with a plurality of protrusions 3321, which are correspondingly arranged with the second filtering holes 3311. Along the conveying direction of the exhaust gas, the rear-end filtering layer 332 is laid on the rear end of the support frame 331, the protrusions 3321 are used to correspondingly extend into the second filtering holes 3311, and the front-end filtering layer 333 is erected on the front end of the support frame 331 through a frame-shaped support structure 3312, so as to finely filter the exhaust gas passing through the second filtering holes 3311 and improve the filtering precision. The front-end filtering layer 333 is arranged in a spaced manner with the protrusions 3321, and through the cooperation of the protrusions 3321 and the second filtering holes 3311, the residual dust in the second filtering holes 3311 can be reduced when the rear-end filtering layer 332 is removed, and the cleaning difficulty of the second filtering holes 3311 is reduced. The front-end filtering layer 333 is arranged at the front end of the support frame 331 and in a spaced manner with the protrusions 3321, so that the protrusions 3321 have a certain degree of freedom, thereby being able to swing to a certain extent, improve the cleaning effect of the second filtering holes 3311, and increase the turbulence effect, so as to compensate for the reduction of the filtering effect after the distance between the second filtering assembly 33 and the first filtering assembly 32 is increased. The materials of the front-end filtering layer 333 and the rear-end filtering layer 332 are not limited, and the front-end filtering layer 333 and the rear-end filtering layer 332 can further play a filtering role on the exhaust gas on the basis of the first filtering assembly 32. The rear-end filtering layer 332 can have a certain hardness, so as to facilitate the cooperation with the second filtering holes 3311.

[0042] As shown in Figure 2 , Figure 3 and Figure 4As shown, optionally, the filtering mechanism 3 comprises a reset assembly 35, which comprises a first elastic member 351, a sliding block 352 and a sliding groove 353. After the second filtering assembly 33 slides away from the first filtering assembly 32 under the action of the increased exhaust gas pressure, the reset assembly 35 can play a role in restoring the second filtering assembly 33 to the initial position. The sliding groove 353 is provided on the first housing 31 to provide a sliding track for the sliding block 352, so that the sliding block 352 can only slide along the path defined by the sliding groove 353. The sliding block 352 is slidingly connected to the sliding groove 353, and the sliding block 352 is connected to the second filtering assembly 33. When the second filtering assembly 33 moves under the action of the exhaust gas pressure, the sliding block 352 will slide synchronously in the sliding groove 353. The first end of the first elastic member 351 is connected to the side of the sliding groove 353 close to the second end of the first housing 31, and the second end of the first elastic member 351 is connected to the sliding block 352. During the sliding of the second filtering assembly 33, the first elastic member 351 will be elastically deformed to generate an elastic force. When the exhaust gas pressure decreases, the elastic force of the first elastic member 351 can push the sliding block 352 to slide reversely in the sliding groove 353, thereby driving the second filtering assembly 33 to reset to the initial position, achieving a better filtering effect and ensuring the continuous and stable operation of the device.

[0043] As shown in Figure 2 , Figure 3 and Figure 5 , optionally, the side of the first filtering assembly 32 close to the second filtering assembly 33 is provided with an electromagnet 321, and the side of the second filtering assembly 33 close to the first filtering assembly 32 is provided with a suction accessory 334. The electromagnet 321 is used to attract the suction accessory 334 close to the first filtering assembly 32 after being electrified, so that the second filtering assembly 33 quickly impacts the first filtering assembly 32.

[0044] As shown in Figure 2 , Figure 3 and Figure 4 , when the second filtering assembly 33 needs to be reset, the electromagnet 321 is electrified to generate a magnetic force to attract the suction accessory 334. Since the suction accessory 334 is arranged on the second filtering assembly 33, the second filtering assembly 33 can quickly approach the first filtering assembly 32 under the action of the magnetic force and impact the first filtering assembly 32. This rapid impact can effectively shake off the impurity particles attached to the filter holes and surfaces of the first filtering assembly 32 and the second filtering assembly 33, preventing these impurities from clogging the filter holes for a long time, thereby ensuring the air permeability and filtering efficiency of the filtering assembly, further ensuring that a good filtering effect can be maintained even when the input amount of exhaust gas is large, avoiding the influence of the decline of the filtering effect on the safety of the subsequent combustion treatment. At the same time, it also helps to keep the exhaust gas pressure at the exhaust gas discharge port stable, improving the safety of the exhaust gas treatment. In this embodiment, the suction accessory 334 can be an electromagnet or a ferrous member.

[0045] As shown in Figure 2 , Figure 3 andFigure 6 As shown, the third filter assembly 34 comprises a shielding plate 342, a second elastic member 343, a second housing 344 and an auxiliary filter layer 345. The shielding plate 342 is arranged between the second filter assembly 33 and the second end of the first housing 31, and comprises a shielding portion 3421 away from the second filter assembly 33 and a communicating portion 3422 close to the second filter assembly 33. The shielding plate 342 is slidingly connected to the first housing 31, and the first housing 31 is provided with an auxiliary outlet 312. The shielding plate 342 is used to selectively shield the auxiliary outlet 312, and the auxiliary outlet 312 is shielded by the shielding portion 3421 and is opened by the communicating portion 3422. The first end of the second elastic member 343 is connected to the end of the shielding plate 342 away from the second filter assembly 33, and the second end of the second elastic member 343 is connected to the second end of the first housing 31, so as to buffer and assist the shielding plate 342 to reset. The second filter assembly 33 slides away from the first filter assembly 32, and can push the shielding plate 342 to move, so as to open the auxiliary outlet 312 and block the first outlet 311.

[0046] As shown in Figure 2 , Figure 3 and Figure 6 , the second housing 344 covers the auxiliary outlet 312, the auxiliary filter layer 345 is arranged at the end of the second housing 344 close to the auxiliary outlet 312, the second housing 344 is provided with a second outlet 341, and the second outlet 341 is arranged above the auxiliary filter layer 345. The first filter assembly 32, the third filter assembly 34, the front filter layer 333 and the rear filter layer 332 can all comprise or be filter nets, filter cloth bags or other structures capable of filtering dust. The first elastic member 351 and the second elastic member 343 can both be springs. The structure and material of the auxiliary filter layer 345 are not limited, and the auxiliary filter layer 345 can further realize the filtering function on the basis of the second filter assembly 33. It can be understood that the filtering precision of the first filter assembly 32, the rear filter layer 332, the front filter layer 333 and the auxiliary filter layer 345 is improved in turn.

[0047] When the exhaust gas input amount is large and the exhaust gas pressure increases, the second filter assembly 33 slides away from the first filter assembly 32. In this process, the second filter assembly 33 pushes the blocking plate 342 to move, and the blocking plate 342 opens the auxiliary outlet 312 of the first shell 31 through the communication part 3422 thereof, while blocking the first outlet 311, so that the exhaust gas changes the flow path and is discharged from the auxiliary outlet 312. The second shell 344 covering the auxiliary outlet 312 provides a space for further filtering of the exhaust gas, and the auxiliary filter layer 345 in the second shell 344 can further filter the exhaust gas that has been preliminarily filtered by the first filter assembly 32 and the second filter assembly 33, thereby improving the filtering effect of the exhaust gas to compensate for the decrease in the filtering effect due to the poor turbulence effect caused by the increased distance between the second filter assembly 33 and the first filter assembly 32. The second outlet 341 arranged above the auxiliary filter layer 345 can ensure that the exhaust gas that has been sufficiently filtered is output from the second shell 344 and finally delivered to the burner through the output mechanism 4, thereby ensuring the filtering effect of the exhaust gas treatment and avoiding the increase in the exhaust gas pressure at the exhaust gas discharge port due to the excessive exhaust gas input amount, thereby improving the safety of the exhaust gas treatment.

[0048] As shown in Figure 2 , Figure 3 and Figure 4 , optionally, the filtering mechanism 3 comprises a blocking assembly 37, and the blocking assembly 37 comprises a connecting piece 371 and a blocking piece 372. One end of the connecting piece 371 is connected to the second filter assembly 33, and the blocking piece 372 is connected to the other end of the connecting piece 371. The blocking piece 372 is used to block the first outlet 311 under the sliding of the second filter assembly 33. When the second filter assembly 33 slides under the action of the exhaust gas pressure, the blocking piece 372 can be moved to block the first outlet 311. In this way, when the exhaust gas input amount is large and the exhaust gas pressure increases, the flow path of the exhaust gas can be changed in time to avoid the exhaust gas being directly discharged through the first outlet 311, thereby ensuring the filtering effect and the filtering efficiency in cooperation with other components, and preventing the pressure at the exhaust gas discharge port from being too large to ensure the safety of the exhaust gas treatment.

[0049] As shown in Figure 2 , Figure 3 and Figure 4As shown, the third filter assembly 34 optionally includes a piston 346 and a first valve body 347. The piston 346 is slidingly arranged in the second housing 344 and is arranged above the auxiliary filter layer 345, and can slide upward as the amount of exhaust gas increases when the exhaust gas enters the second housing 344, so that the second housing 344 can buffer the exhaust gas, avoiding damage to the device caused by excessive exhaust gas pressure. The first valve body 347 is used to exhaust the gas at one end of the piston 346 away from the auxiliary filter layer 345, to ensure that the gas pressure above the piston 346 is stable, to maintain the normal sliding of the piston 346, to ensure the stable operation of the exhaust gas buffering function, and to improve the stability and safety of the operation of the exhaust gas treatment device. Specifically, the first valve body 347 can be a one-way valve.

[0050] As shown in Figure 2 , Figure 3 and Figure 4 As shown, the filter mechanism 3 optionally includes an air suction assembly 36, which includes a connecting pipe 361, a valve body group 362, a second valve body 363, and an air suction member 364. The air suction assembly 36 is arranged to clean and adjust the airflow of the filter mechanism 3. The connecting pipe 361 includes a first communication end 3611, a second communication end 3612, and a third communication end 3613 that are in communication with each other. The first communication end 3611 and the second communication end 3612 are both in communication with the first housing 31, wherein the first communication end 3611 is arranged at the rear end of the first filter assembly 32, and the second communication end 3612 is arranged between the first filter assembly 32 and the second filter assembly 33. The third communication end 3613 is in communication with one end of the second housing 344 away from the first housing 31, and can lead the gas at different positions in the first housing 31 out.

[0051] The valve body group 362 is arranged at the third communication end 3613 and is used to selectively allow the gas to flow from the first housing 31 to the upper end of the second housing 344. The second housing 344 is provided with an air suction port 3441, and the air suction member 364 is connected to the air suction port 3441 and is used to suck air out of the upper end of the second housing 344. The first housing 31 is provided with an air vent 313, and the air vent 313 is provided with the second valve body 363, which is used to allow the atmosphere to enter the first housing 31 when the air suction member 364 is sucking air. The air suction port 3441 and the third communication end 3613 are both arranged above the highest position of the piston 346. The air suction member 364 can be an air suction pump, and the output end of the air suction member 364 can be provided with an output pipe 365, and a filter block 366 can be arranged in the output pipe 365 or the air suction port 3441. The valve body group 362 can include a solenoid valve and a one-way valve, so that the gas in the first housing 31 can selectively flow into the second housing 344 and be discharged through the air suction port 3441, the air suction member 364, and the output pipe 365. Valves can be arranged in the output pipe 365 as needed to allow the air suction port 3441 to communicate only when air is being sucked into the first housing 31.

[0052] AsFigure 2 、 Figure 3 and Figure 4 As shown, the valve body assembly 362 is provided at the third connecting end 3613 of the connecting pipe 361, and can selectively allow gas to flow from the first shell 31 to the upper end of the second shell 344, thereby achieving airflow conduction between the two shells. The suction member 364 is connected to the suction port 3441 of the second shell 344, and draws air outward from the upper end of the second shell 344, forming airflow suction. The second valve body 363 at the vent 313 of the first shell 31 allows the atmosphere to enter the first shell 31 when the suction member 364 draws air, thereby maintaining the air pressure balance in the first shell 31. Overall, it helps to enhance the filtering effect of the exhaust gas treatment device, reduce the blockage of the filter component, improve the stability and reliability of the device operation, and solve the problem of difficulty in balancing the filtering effect and efficiency when the exhaust gas input is large.

[0053] Furthermore, a third valve body 23 can be provided at the output end of the input mechanism 2. The third valve body 23 can be a solenoid valve, used to control the on / off flow of exhaust gas, so that it can be disconnected when the suction assembly 36 is in use, preventing the exhaust gas from being sucked out. A fourth valve body 3111 can be provided at the first output port 311. The fourth valve body 3111 can be a solenoid valve, used to disconnect when the suction assembly 36 is in use. The fourth valve body 3111 can also be a one-way valve, allowing gas to enter the first housing 31 from the outside. A fifth valve body 3411 can be provided at the second output port 341. The fifth valve body 3411 can be a one-way valve, allowing gas to flow from the second housing 344 to the output mechanism 4. Furthermore, the valve bodies mentioned in this embodiment can be either solenoid valves or one-way valves, or a combination of the two, as needed.

[0054] like Figure 2 、 Figure 3 and Figure 4 As shown, optionally, the device also includes a control mechanism, and the input mechanism 2 includes an air pump 21 and a detection component 22. The detection component 22 is provided in the collection mechanism 1 and can measure the concentration of the collected exhaust gas in real time. The air pump 21 is used to connect the collection mechanism 1 and the filtering mechanism 3, and is used to transport the collected exhaust gas to the filtering mechanism 3. The air pump 21 and the detection component 22 are both communicatively connected to the control mechanism to adjust the rotation speed of the air pump 21 according to the exhaust gas concentration measured by the detection component 22, so as to achieve flexible adjustment of the exhaust gas delivery volume according to the actual exhaust gas concentration, improve the efficiency and pertinence of the exhaust gas treatment, and avoid problems such as poor filtering effect or excessive exhaust gas pressure caused by inappropriate exhaust gas input. Specifically, the control mechanism can be a PLC, and the control mechanism is simultaneously electrically connected to multiple valve bodies and electromagnets and other structures that need to be controlled in this embodiment to achieve corresponding functions; the detection component 22 can be a VOC detector.

[0055] It can be understood that the device also includes necessary structures for connection, support, driving, positioning, limiting, sealing and control, etc. to enable the device to operate normally; the shape, size, material and set number of each part of the device can be determined as needed, as long as the corresponding functions can be realized.

[0056] The implementation principle of the waste gas treatment device of the petroleum sewage system according to the embodiment of the application is as follows: when the waste gas pressure increases, the second filter assembly 33 will slide away from the first filter assembly 32 under the action of the waste gas pressure, the distance between the first filter assembly 32 and the second filter assembly 33 is increased, the disturbance effect is appropriately reduced, the resistance of the waste gas to the filtration is reduced, and the waste gas can maintain a relatively fast flow speed; and by blocking the first output port 311 and making the third filter assembly 34 communicate with the first shell 31, when the waste gas input is large, the waste gas path of the filtration process is extended, the filtration pressure is shared by the third filter assembly 34, so that the filtration effect is ensured, the influence on the filtration effect is reduced, the rapid flow and transportation of the waste gas are realized, the waste gas pressure at the waste gas discharge port is prevented from being too large, and the safety of the waste gas treatment is improved.

[0057] On the other hand, the embodiment of the application discloses a waste gas treatment method of a petroleum sewage system, using the waste gas treatment device of the petroleum sewage system described above, including the following steps: S10, waste gas collection, collecting waste gas through the collection mechanism 1; S20, waste gas filtration, inputting the waste gas to the filtration mechanism 3 through the input mechanism 2 for filtration, and outputting the waste gas to the burner through the output mechanism 4; S30, combustion treatment, combusting the filtered waste gas through the burner; S40, spray cooling, spraying the waste gas in the spray tower through the reagent and cooling the waste gas in the condenser after the combustion treatment; S50, catalytic oxidation, catalytically oxidizing the cooled waste gas through the catalyst; S60, adsorption treatment, removing impurities from the catalytically oxidized waste gas through adsorption, and then discharging.

[0058] As Figure 2 , Figure 3 and Figure 4 Figure 2 Figure 3 Figure 4As shown, first, the waste gas discharged from the waste gas discharge port of the oil sewage system is collected by the collecting mechanism 1 to avoid pollution caused by direct discharge of the waste gas into the external environment; then the collected waste gas is transported to the filtering mechanism 3 by the input mechanism 2, the first filtering assembly 32, the second filtering assembly 33 and the third filtering assembly 34 in the filtering mechanism 3 can perform multi-stage filtering on the waste gas, wherein the filter holes of the first filtering assembly 32 and the second filtering assembly 33 are arranged in a staggered manner to enhance the filtering effect, when the waste gas pressure is relatively large, the second filtering assembly 33 slides to block the first output port 311 and makes the third filtering assembly 34 communicate with the first shell 31, further guaranteeing the filtering efficiency, preventing the pressure at the waste gas discharge port from being too large, and improving the safety of waste gas treatment; the filtered waste gas is transported to the burner by the output mechanism 4 for combustion treatment, harmful substances in the waste gas are converted into harmless substances; then the waste gas is sprayed and cooled by the medicament to reduce the temperature of the waste gas and remove part of the impurities and harmful substances; then the waste gas is catalytically oxidized by the catalyst to further decompose the harmful substances in the waste gas; finally, adsorption treatment is performed to adsorb the remaining small particles and harmful substances, so that the waste gas generated by the oil sewage system is comprehensively and effectively treated, and the effect and safety of waste gas treatment are guaranteed. In this embodiment, the collecting mechanism 1, the burner and the mechanisms required for cooling, spraying, catalytic oxidation and adsorption treatment can all be existing mechanisms selected according to actual needs.

[0059] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An exhaust gas treatment device for a petroleum wastewater system, arranged between the exhaust gas discharge port of the petroleum wastewater system and a burner for burning the exhaust gas, characterized in that: include: A collecting mechanism (1) cooperates with the exhaust gas discharge port to collect the exhaust gas; an input mechanism (2), wherein a first end of the input mechanism (2) is connected to the collecting mechanism (1); The filter mechanism (3) comprises a first housing (31), a first filter assembly (32), a second filter assembly (33) and a third filter assembly (34), wherein the first end of the first housing (31) is connected to the second end of the input mechanism (2), the first filter assembly (32) is fixedly arranged in the first housing (31), the second filter assembly (33) is slidably arranged in the first housing (31), and the second filter assembly (33) is arranged at the front end of the first filter assembly (32) along the conveying direction of the exhaust gas, the first filter hole of the first filter assembly (32) and the second filter hole of the second filter assembly (33) are connected. The filter holes (3311) are staggered, the third filter assembly (34) is arranged outside the first housing (31), the third filter assembly (34) is selectively connected to the first housing (31), the first housing (31) is provided with a first output port (311) at the second end close to the second filter assembly (33), the third filter assembly (34) is provided with a second output port (341), and the second filter assembly (33) can slide in a direction away from the first filter assembly (32) under the action of exhaust gas pressure to block the first output port (311) and enable the third filter assembly (34) to connect to the first housing (31); An output mechanism (4), wherein the first output port (311) and the second output port (341) are both connected to the output mechanism (4), and the output mechanism (4) is connected to a burner.

2. The waste gas treatment device for the petroleum wastewater system according to claim 1, characterized in that: The second filter assembly (33) includes a support frame (331), a rear filter layer (332) and a front filter layer (333), the support frame (331) is provided with a plurality of second filter holes (3311), the rear filter layer (332) is provided with a plurality of protrusions (3321), the protrusions (3321) are arranged corresponding to the second filter holes (3311), along the conveying direction of the exhaust gas, the rear filter layer (332) is laid on the rear end of the support frame (331), the protrusions (3321) are used to extend into the second filter holes (3311), the front filter layer (333) is arranged at the front end of the support frame (331), and the front filter layer (333) and the protrusions (3321) are arranged at intervals.

3. The waste gas treatment device for the petroleum wastewater system according to claim 1, characterized in that: The filter mechanism (3) includes a reset assembly (35), the reset assembly (35) includes a first elastic member (351), a slider (352) and a slide groove (353), the slide groove (353) is provided on the first shell (31), the slider (352) is connected to the second filter assembly (33), the slider (352) is slidably connected to the slide groove (353), the first end of the first elastic member (351) is connected to a side of the slide groove (353) close to the second end of the first shell (31), and the second end of the first elastic member (351) is connected to the slider (352).

4. The waste gas treatment device for a petroleum wastewater system according to claim 1, characterized in that: An electromagnet (321) is provided on one side of the first filter component (32) close to the second filter component (33), and an adsorption component (334) is provided on one side of the second filter component (33) close to the first filter component (32). The electromagnet (321) is used to attract the adsorption component (334) to approach after being energized, so that the second filter component (33) quickly impacts the first filter component (32).

5. The waste gas treatment device for a petroleum wastewater system according to claim 1, characterized in that: The third filter assembly (34) comprises a shielding plate (342), a second elastic member (343), a second shell (344) and an auxiliary filter layer (345); the first shell (31) is provided with an auxiliary outlet (312); the shielding plate (342) is provided between the second filter assembly (33) and the second end of the first shell (31); the shielding plate (342) comprises a shielding portion (3421) away from the second filter assembly (33) and a connecting portion (3422) close to the second filter assembly (33); the shielding plate (342) is slidably connected to the first shell (31); the shielding plate (342) is used to selectively shield the auxiliary outlet (312); the shielding portion (3421) shields the auxiliary outlet (312); and the connecting portion (3422) opens the auxiliary outlet (312). 12), a first end of the second elastic member (343) is connected to an end of the baffle (342) away from the second filter assembly (33), a second end of the second elastic member (343) is connected to the second end of the first shell (31), the second filter assembly (33) slides in a direction away from the first filter assembly (32), and can push the baffle (342) to move to open the auxiliary outlet (312) and block the first outlet (311), the second shell (344) is covered with the auxiliary outlet (312), the auxiliary filter layer (345) is provided at an end of the second shell (344) close to the auxiliary outlet (312), the second shell (344) is provided with the second outlet (341), and the second outlet (341) is provided above the auxiliary filter layer (345).

6. The waste gas treatment device for the petroleum wastewater system according to claim 5, characterized in that: The third filter assembly (34) includes a piston (346) and a first valve body (347). The piston (346) is slidably arranged in the second shell (344). The piston (346) is arranged above the auxiliary filter layer (345) so that the second shell (344) can cache the exhaust gas. The first valve body (347) is used to discharge the gas at one end of the piston (346) away from the auxiliary filter layer (345).

7. The waste gas treatment device for a petroleum wastewater system according to claim 6, characterized in that: The filter mechanism (3) includes an air suction component (36), the air suction component (36) includes a connecting pipe (361), a valve body group (362), a second valve body (363) and an air extraction member (364), the connecting pipe (361) includes a first communicating end (3611), a second communicating end (3612) and a third communicating end (3613) which are connected to each other, the first communicating end (3611) and the second communicating end (3612) are both connected to the first shell (31), the first communicating end (3611) is provided at the rear end of the first filter component (32), the second communicating end (3612) is provided between the first filter component (32) and the second filter component (33), and the third communicating end (3613) is connected to the second shell (344) away from the first shell ( 31), the valve body group (362) is provided at the third connecting end (3613) and is used to selectively allow gas to flow from the first shell (31) to the upper end of the second shell (344), the second shell (344) is provided with an exhaust port (3441), the exhaust member (364) is connected to the exhaust port (3441), and is used to exhaust gas from the upper end of the second shell (344) to the outside, the first shell (31) is provided with an air vent (313), the air vent (313) is provided with the second valve body (363), the second valve body (363) is used to allow atmospheric air to enter the first shell (31) when the exhaust member (364) is exhausting gas, the exhaust port (3441) and the third connecting end (3613) are both provided above the highest position of the piston (346).

8. The waste gas treatment device for a petroleum wastewater system according to claim 1, characterized in that: The filtering mechanism (3) comprises a blocking component (37), the blocking component (37) comprising a connecting member (371) and a blocking member (372), one end of the connecting member (371) being connected to the second filtering component (33), the blocking member (372) being connected to the other end of the connecting member (371), the blocking member (372) being used to block the first output port (311) when the second filtering component (33) slides.

9. The waste gas treatment device for a petroleum wastewater system according to claim 1, characterized in that: The invention also includes a control mechanism, wherein the input mechanism (2) includes an air pump (21) and a detection member (22), the detection member (22) is provided on the collection mechanism (1), the air pump (21) is used to connect the collection mechanism (1) and the filtering mechanism (3), and the air pump (21) and the detection member (22) are both communicatively connected to the control mechanism to adjust the rotation speed of the air pump (21) according to the exhaust gas concentration measured by the detection member (22).

10. A method for treating waste gas from a petroleum wastewater system, characterized in that: The waste gas treatment device for a petroleum wastewater system according to any one of claims 1 to 9 comprises the following steps: Exhaust gas collection, collecting exhaust gas through the collection mechanism (1); Exhaust gas filtration, the input mechanism (2) transports the exhaust gas to the filtering mechanism (3) for filtration, and the exhaust gas is transported to the burner through the output mechanism (4); Combustion treatment: the filtered waste gas is burned through a burner; Spray cooling: spray and cool the exhaust gas after combustion treatment through chemicals; Catalytic oxidation, catalytic oxidation of the cooled exhaust gas through a catalyst; Adsorption treatment removes impurities from the exhaust gas after catalytic oxidation by adsorption and then discharges it.

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