Volatile organic compound treatment system and method

Abstract

The invention relates to a volatile organic compound treatment system and method.The volatile organic compound treatment system comprises an emptying pipeline, a condensate tank, a pressurizing pipeline, a fuel pipeline and a combustion chamber, and a combustor and an incandescent light are arranged in the combustion chamber. The emptying pipeline is used for collecting generated volatile organic compounds, the emptying pipeline is connected with an inlet of the condensate tank in an on-off mode, a gas phase outlet of the condensate tank is connected with the first end of the pressurizing pipeline in an on-off mode, and the second end of the pressurizing pipeline is connected with the combustor in an on-off mode. The fuel pipeline is connected with the incandescent light in an on-off mode and can convey fuel to the incandescent light, a fuel bypass is connected to the fuel pipeline in a bypass mode, and the fuel bypass is connected with the pressurization pipeline in an on-off mode. According to the invention, the discharge amount of volatile organic compounds can be effectively reduced, the volatile organic compounds are fully decomposed, and the treatment effect on the volatile organic compounds is improved.

Description

Technical Field

[0001] The present invention relates to the field of waste gas treatment, and particularly to a treatment system and method for volatile organic compounds. Background Art

[0002] In order to prevent environmental pollution, improve environmental quality, and promote the technological progress and sustainable development of the onshore oil and gas extraction industry, requirements have been put forward for the control, monitoring, and supervision and management of atmospheric pollutant emissions in the onshore oil and gas extraction industry. At the same time, co-control requirements for the emission of greenhouse gas methane have been put forward. Requirements for the emission control of volatile organic compounds (VOCs) in the onshore oil and gas extraction industry have been put forward, mainly including emission control requirements for the storage of volatile organic liquids, loading, wastewater gathering and treatment system emissions, leakage emissions from equipment and pipeline components, waste gas collection and treatment, etc. Therefore, at present, oil and gas field enterprises are required to comprehensively sort out VOCs treatment problems in accordance with the standards to achieve full coverage of benchmarking inspections and problem rectification.

[0003] Currently, the waste gas generated during the storage and transportation of petroleum liquids is directly discharged. However, with the increasingly strict environmental protection requirements, the impact of VOC emissions on the atmospheric environment cannot be ignored. In the field of oil and gas storage and transportation, a large amount of VOCs will be generated during the production and operation of storage and transportation stations. To effectively reduce the impact of VOCs on the environment, it is necessary to treat the VOCs before discharging.

[0004] However, limited by technical conditions, transportation costs, etc., such gases are generally discharged locally, polluting the environment and wasting resources. Some existing treatment devices use methods such as filtration adsorption or water treatment, but the decomposition of VOCs is not sufficient, the adsorption treatment effect is limited, and the treatment cost is high. Summary of the Invention

[0005] The purpose of the present invention is to provide a treatment system and method for volatile organic compounds, which can effectively reduce the emission of volatile organic compounds, fully decompose the volatile organic compounds, and improve the treatment effect on volatile organic compounds.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a treatment system for volatile organic compounds, which includes a vent pipeline, a condensate tank, a pressurization pipeline, a fuel pipeline and a combustion chamber. A burner and a pilot burner are arranged in the combustion chamber; the vent pipeline is used to collect the generated volatile organic compounds, and the vent pipeline is connected to the inlet of the condensate tank in a switchable manner. The gas-phase outlet of the condensate tank is connected to the first end of the pressurization pipeline in a switchable manner, and the second end of the pressurization pipeline is connected to the burner in a switchable manner; the fuel pipeline is connected to the pilot burner in a switchable manner and can supply fuel to the pilot burner. A fuel bypass is connected in parallel to the fuel pipeline, and the fuel bypass is connected to the pressurization pipeline in a switchable manner.

[0008] In a preferred embodiment of the present invention, a front pressure sensor, a pressurization fan and a rear pressure sensor are sequentially arranged on the pressurization pipeline from its first end to the second end; when the pressurization fan is in a closed state, the pressurization fan can be opened when the pipeline pressure detected by the front pressure sensor is lower than a first preset value; when the pressurization fan is in an open state, the pressurization fan can be closed when the pipeline pressure detected by the rear pressure sensor is higher than a second preset value.

[0009] In a preferred embodiment of the present invention, a hydrocarbon concentration flowmeter, a front shut-off valve, a rear shut-off valve, a front flame arrester and a rear flame arrester are further arranged on the pressurization pipeline. The hydrocarbon concentration flowmeter is arranged between the first end of the pressurization pipeline and the front pressure sensor. The front shut-off valve and the front flame arrester are sequentially arranged between the front pressure sensor and the pressurization fan along the fluid transportation direction. The rear shut-off valve and the rear flame arrester are sequentially arranged between the rear pressure sensor and the second end of the pressurization pipeline along the fluid transportation direction. The connection point of the fuel bypass and the pressurization pipeline is located between the rear flame arrester and the second end of the pressurization pipeline.

[0010] In a preferred embodiment of the present invention, a primary pressure regulating valve, a secondary pressure regulating valve and a first shut-off valve are sequentially arranged on the fuel pipeline along the fluid transportation direction. The fuel bypass is connected in parallel between the primary pressure regulating valve and the secondary pressure regulating valve, and a second shut-off valve is arranged on the fuel bypass.

[0011] In a preferred embodiment of the present invention, a temperature detector and a damper are further arranged on the combustion chamber. The temperature detector is used to monitor the flame temperature in the combustion chamber in real time. The damper can be opened when the flame temperature is lower than a preset minimum temperature, and can also be closed when the flame temperature is higher than a preset maximum temperature.

[0012] In a preferred embodiment of the present invention, the treatment system for volatile organic compounds further includes an oil storage tank, a filling pipeline, a loading arm and an exhaust pipe. The first end of the filling pipeline is connected to the oil storage tank, and the second end of the filling pipeline is a closed end; one end of the loading arm is connected in parallel to the filling pipeline in a switchable manner, and the other end is used to connect to the storage tank to be filled; one end of the exhaust pipe is connected in parallel to the loading arm, and the other end is connected in parallel to the vent pipeline in a switchable manner; the liquid-phase outlet of the condensate tank is connected in parallel to the filling pipeline through an oil receiving pipeline in a switchable manner.

[0013] In a preferred embodiment of the present invention, the volatile organic compound treatment system further includes an emergency liquid collection pipeline with both ends closed, a liquid collection tank, and a plurality of emergency liquid collection connectors. Each emergency liquid collection connector is bypassed on the emergency liquid collection pipeline in a switchable manner. The liquid collection tank is connected in series on the emergency liquid collection pipeline, and the liquid collection tank is connected to the storage oil tank through a liquid collection pipeline.

[0014] The present invention also provides a method for treating volatile organic compounds, including:

[0015] S1. Collect the generated volatile organic compounds into the vent pipeline;

[0016] S2. Use a condensate tank to preliminarily separate the volatile organic compounds collected in the vent pipeline;

[0017] S3. Deliver fuel to the pilot light and the pressurization pipeline in the combustion chamber, and deliver the gas separated by the condensate tank to the burner in the combustion chamber through the pressurization pipeline, and use the burner to burn-treat the gas.

[0018] In a preferred embodiment of the present invention, step S3 further includes: continuously monitoring the first pipeline pressure at the inlet end of the pressurization fan provided on the pressurization pipeline and the second pipeline pressure at the outlet end of the pressurization fan; when the first pipeline pressure is lower than the first preset value in the state where the pressurization fan is closed, turn on the pressurization fan; when the second pipeline pressure is higher than the second preset value in the state where the pressurization fan is open, turn off the pressurization fan.

[0019] In a preferred embodiment of the present invention, step S3 further includes: continuously monitoring the flame temperature in the combustion chamber, opening the damper of the combustion chamber when the flame temperature is lower than the preset minimum temperature; closing the damper of the combustion chamber when the flame temperature is higher than the preset maximum temperature.

[0020] In a preferred embodiment of the present invention, step S1 includes the following steps: filling the oil liquid stored in the storage oil tank into the to-be-filled storage tank through a loading arm connected to the filling pipeline; delivering the volatile organic compounds generated by the oil liquid in the loading arm to the vent pipeline through an exhaust pipe bypassed on the loading arm; in step S2, the liquid separated by the condensate tank is delivered to the filling pipeline through an oil collection pipeline.

[0021] As described above, the treatment system and method of the present invention collect the generated volatile organic compounds, mix them with fuel, and then deliver them to the burner for combustion treatment, which can make the volatile organic compounds decompose more fully, have good treatment effects, low treatment costs, greatly reduce the emissions of volatile organic compounds, and achieve the thorough treatment of volatile organic compounds. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following drawings are only intended to illustrate and explain the present invention schematically and do not limit the scope of the present invention.

[0023] Wherein:

[0024] Figure 1 : is a schematic structural diagram of the volatile organic compound treatment system provided by the present invention.

[0025] Explanation of the reference numerals in the drawings:

[0026] 1. Vent pipeline;

[0027] 2. Condensate tank; 21. Oil collection pipeline; 211. Third filter; 212. Oil collection pump;

[0028] 3. Boosting pipeline; 31. Hydrocarbon concentration flowmeter; 32. Front pressure sensor; 33. Front shut-off valve; 34. Front flame arrester; 35. Boosting fan; 36. Rear pressure sensor; 37. Rear shut-off valve; 38. Rear flame arrester;

[0029] 4. Fuel pipeline; 41. Fuel bypass; 411. Second shut-off valve; 42. First filter; 43. Primary pressure regulating valve; 44. Secondary pressure regulating valve; 45. First shut-off valve;

[0030] 5. Combustion chamber; 51. Burner; 511. Combustion air chamber; 52. Pilot light; 53. Temperature detector; 54. Air damper; 55. Flame detector; 56. Air-assisted combustion fan;

[0031] 6. Oil storage tank;

[0032] 7. Filling pipeline; 71. Second filter; 72. Filling pump;

[0033] 8. Loading arm; 81. Exhaust pipe;

[0034] 9. Emergency liquid collection pipeline; 91. Liquid collection tank; 92. Emergency liquid collection joint; 93. Liquid collection pipeline; 931. Fourth filter; 932. Liquid collection pump. Detailed implementation manners

[0035] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0036] Embodiment 1

[0037] As Figure 1As shown in the figure, the present application provides a treatment system for volatile organic compounds, which includes an exhaust pipe 1, a condensate tank 2, a pressurization pipe 3, a fuel pipe 4 and a combustion chamber 5. A burner 51 and a pilot light 52 are arranged in the combustion chamber 5; the exhaust pipe 1 is used to collect the generated volatile organic compounds, and the exhaust pipe 1 is connected to the inlet of the condensate tank 2 in a switchable manner. The gas-phase outlet of the condensate tank 2 is connected to the first end of the pressurization pipe 3 in a switchable manner, and the second end of the pressurization pipe 3 is connected to the burner 51 in a switchable manner; the fuel pipe 4 is connected to the pilot light 52 in a switchable manner and can supply fuel to the pilot light 52. A fuel bypass 41 is connected in parallel to the fuel pipe 4, and the fuel bypass 41 is connected to the pressurization pipe 3 in a switchable manner.

[0038] During use, after the generated volatile organic compounds are collected in the exhaust pipe 1, they are first transported to the condensate tank 2 for preliminary separation. The gas generated after separation is pressurized by the pressurization pipe 3 and then mixed with the fuel transported by the fuel bypass 41 and is transported into the burner 51; after the fuel enters the pilot light 52 through the fuel pipe 4 and burns, the burner 51 starts to burn by using the pilot light 52, and then the gas transported into the burner 51 can be burned and treated.

[0039] Therefore, the treatment system of the present application collects the generated volatile organic compounds, mixes them with fuel and then transports them into the burner 51 for combustion treatment, which can make the volatile organic compounds decompose more fully, and has good treatment effect and low treatment cost, greatly reducing the emission of volatile organic compounds and realizing the thorough treatment of volatile organic compounds.

[0040] Further, a booster fan 35 is arranged on the pressurization pipe 3 to facilitate the pressurization of the transported gas and facilitate its mixing with the fuel transported by the fuel bypass 41 and then transporting it into the burner 51. The booster fan 35 is preferably an explosion-proof fan.

[0041] In a specific embodiment, in order to increase safety protection, generally a front pressure sensor 32, a booster fan 35 and a rear pressure sensor 36 are sequentially arranged on the pressurization pipe 3 from its first end to the second end.

[0042] When the booster fan 35 is in the closed state, the booster fan 35 can be opened when the pipeline pressure detected by the front pressure sensor 32 is lower than the first preset value (for example, 0.38 KPa). This situation mainly aims at the situation where when the booster fan 35 is closed, there is a leak in the pipeline and the pipeline pressure in front of the booster fan 35 is relatively low. At this time, opening the booster fan 35 can quickly send the gas remaining in the pipeline to the burner 51 for combustion.

[0043] When the booster fan 35 is in the open state, the booster fan 35 can be closed when the pipeline pressure detected by the post-pressure sensor 36 is higher than the second preset value. This situation mainly targets the case where the pipeline is blocked when the booster fan 35 is open, resulting in a relatively high pipeline pressure after the booster fan 35. At this time, the booster fan 35 is closed.

[0044] Further, a hydrocarbon concentration flowmeter 31, a front switching valve 33, a rear switching valve 37, a front flame arrester 34 and a rear flame arrester 38 are also provided on the booster pipeline 3. The hydrocarbon concentration flowmeter 31 is arranged between the first end of the booster pipeline 3 and the front pressure sensor 32. The front switching valve 33 and the front flame arrester 34 are sequentially arranged between the front pressure sensor 32 and the booster fan 35 along the fluid transport direction. The rear switching valve 37 and the rear flame arrester 38 are sequentially arranged between the rear pressure sensor 36 and the second end of the booster pipeline 3 along the fluid transport direction. The connection point of the fuel bypass 41 and the booster pipeline 3 is located between the rear flame arrester 38 and the second end of the booster pipeline 3.

[0045] The hydrocarbon concentration flowmeter 31 is used to measure the hydrocarbon concentration of the incoming gas pipeline to facilitate the detection of the content of volatile organic compounds in the booster pipeline 3. The front flame arrester 34 and the rear flame arrester 38 can prevent backfire and play a role in safety protection. The front switching valve 33 and the rear switching valve 37 can play a role in cutting off in case of leakage in the upstream pipeline.

[0046] The above-mentioned fuel pipeline 4 is mainly used to supply fuel to the pilot burner 52 and supply fuel to the booster pipeline 3 downstream of the booster fan 35 through the fuel bypass 41. The fuel should be a combustible gas fuel, such as natural gas. The fuel transported into the booster pipeline 3 is mainly used as the combustion-supporting gas of the gas, so that the gas and the combustion-supporting gas can be mixed and burned after being transported into the burner 51.

[0047] Since the pressure required for the fuel of the pilot burner 52 is relatively small, a slightly positive pressure is sufficient, while the pressure required for the combustion-supporting fuel in the booster pipeline 3 is relatively large. In order to facilitate the pressure regulation of the fuel, a primary pressure regulating valve 43, a secondary pressure regulating valve 44 and a first switching valve 45 are sequentially arranged on the fuel pipeline 4 along the fluid transport direction. The fuel bypass 41 is bypassed between the primary pressure regulating valve 43 and the secondary pressure regulating valve 44, and a second switching valve 411 is provided on the fuel bypass 41.

[0048] A first filter 42 is also provided on the general fuel pipeline 4, and this first filter 42 is provided upstream of the primary pressure regulating valve 43. The first switching valve 45 here is always in the open state under normal circumstances and closes in case of pipeline leakage or other failures. The second switching valve 411 is synchronized with the switch of the booster fan 35. Generally, when gas enters the booster pipeline 3, it can be transported to the burner 51 for combustion. In practice, to ensure that the gas can smoothly enter the burner 51, in this embodiment, the burner 51 burns when the booster fan 35 is turned on, and the burner 51 does not burn when the booster fan 35 is turned off.

[0049] Referring to Figure 1 , a temperature detector 53 and a damper 54 are also provided on the combustion chamber 5. The temperature detector 53 is used to monitor the flame temperature in the combustion chamber 5 in real time. The damper 54 can be opened when the flame temperature is lower than the preset minimum temperature, and can also be closed when the flame temperature is higher than the preset maximum temperature.

[0050] Specifically, the size of the combustion chamber 5 is determined according to needs. In this embodiment, the combustion chamber 5 is of a cylindrical structure, with a diameter of 2.4 m and a height of 15 m. The temperature detector 53 and the pilot lamp 52 are both provided on the side wall of the combustion chamber 5 and close to its top. The damper 54 is provided on the bottom side wall of the combustion chamber 5. The burner 51 is provided inside the combustion chamber 5, and the burner 51 is connected with a combustion-supporting air chamber 511; generally, a flame detector 55 is also provided on the top side wall of the combustion chamber 5, and an air combustion-supporting fan 56 is also provided outside the side wall of the combustion chamber 5 to supply combustion-supporting air to the combustion-supporting air chamber 511. The temperature detector 53 and the damper 54 are interlocked. When it is detected that the flame temperature is too low, the damper 54 is interlocked to open wider, which can make the combustion more complete.

[0051] It can be understood that in practical applications, the processing system further includes a controller, and the controller is electrically connected to the above-mentioned front pressure sensor 32, booster fan 35, rear pressure sensor 36, hydrocarbon concentration flowmeter 31, front switching valve 33, rear switching valve 37, primary pressure regulating valve 43, secondary pressure regulating valve 44, first switching valve 45, second switching valve 411, temperature detector 53, damper 54, and other corresponding switching valves.

[0052] The processing system in this embodiment can be applied to any occasion that needs to process volatile organic compounds, and is particularly suitable for processing volatile organic compounds generated by petroleum liquids in the oil and gas energy field. For example, the processing system can be applied to the occasion of loading oil products onto trains in a train trestle. When filling the oil liquid in the storage tank 6 into the oil tank to be filled on the train, the generated volatile organic compounds can be processed by the processing system in this embodiment.

[0053] Specifically, the volatile organic compound treatment system further includes an oil storage tank 6, a filling pipeline 7, a loading arm 8, and an exhaust pipe 81. The first end of the filling pipeline 7 is connected to the oil storage tank 6, and the second end of the filling pipeline 7 is a closed end. One end of the loading arm 8 is bypassed to the filling pipeline 7 in a switchable manner, and the other end is used to connect to the storage tank to be filled. One end of the exhaust pipe 81 is bypassed to the loading arm 8, and the other end is bypassed to the vent pipeline 1 in a switchable manner. The liquid phase outlet of the condensate tank 2 is bypassed to the filling pipeline 7 in a switchable manner through an oil recovery pipeline 21.

[0054] It can be understood that the number of loading arms 8 can be multiple, and corresponding on-off valves are provided on each loading arm 8. The number of exhaust pipes 81 is the same as the number of loading arms 8, and corresponding on-off valves are also provided on each exhaust pipe 81. A second filter 71 and a filling pump 72 are sequentially provided on the filling pipeline 7 along the fluid transportation direction near its first end. The end of the vent pipeline 1 far from the condensate tank 2 is a closed end, and a corresponding on-off valve is provided at the end near the condensate tank 2. A corresponding on-off valve is provided at the first end of the pressurization pipeline 3, and a corresponding on-off valve is provided at the position on the oil recovery pipeline 21 near the condensate tank 2 to achieve on-off at each location. A third filter 211 and an oil recovery pump 212 are sequentially provided on the oil recovery pipeline 21 along the fluid transportation direction and behind the corresponding on-off valve.

[0055] During use, connect the other end of the loading arm 8 to the storage tank to be filled, and the oil in the oil storage tank 6 can be filled into the storage tank to be filled. The generated volatile organic compounds are collected into the vent pipeline 1 through the corresponding exhaust pipe 81, and after being preliminarily separated by the condensate tank 2, they are mixed with the combustion-supporting gas and transported to the burner 51 for combustion treatment.

[0056] Furthermore, the volatile organic compound treatment system further includes an emergency liquid collection pipeline 9 with both ends closed, a liquid collection tank 91, and a plurality of emergency liquid collection connectors 92. Each emergency liquid collection connector 92 is bypassed to the emergency liquid collection pipeline 9 in a switchable manner. The liquid collection tank 91 is connected in series to the emergency liquid collection pipeline 9, and the liquid collection tank 91 is connected to the oil storage tank 6 through a liquid collection pipeline 93.

[0057] Among them, the liquid collection tank 91 should be located at the low point of the emergency liquid collection pipeline 9. A fourth filter 931 and a liquid collection pump 932 are sequentially provided on the liquid collection pipeline 93 along the fluid transportation direction. The emergency liquid collection connector 92 is bypassed to the emergency liquid collection pipeline 9 through a corresponding on-off valve. In some emergency situations, such as when there is a leaking tank body, the emergency liquid collection connector 92 can be connected to the corresponding leaking tank body, and the oil in the leaking tank body can be quickly collected into the liquid collection tank 91 and re-input into the oil storage tank 6 through the oil recovery pump 212.

[0058] More specifically, taking the case where this treatment system is applied to the working condition of loading oil onto trains at a train trestle and using the natural gas in the station as fuel, the specific treatment process is as follows:

[0059] The petroleum liquid is pressurized by the filling pump 72 from the storage tank 6 and then enters the filling pipeline 7, and then the loading operation is completed through multiple loading arms 8. During the loading process and after the loading is completed, the volatile organic compound gas in slightly positive pressure that overflows enters the vent pipeline 1 through the exhaust pipes 81 on each loading arm 8, and then enters the condensate tank 2. After gas-liquid separation, the gas phase continues to mix with the combustion-supporting natural gas through the front flame arrester 34 and the rear flame arrester 38 and then enters the burner 51 for combustion.

[0060] During the combustion of the volatile organic compounds in the burner 51, the temperature detector 53 on the combustion chamber 5 of the burner 51 monitors the temperature of the flame in real time. When the temperature is higher than 1093 °C, the air damper 54 is closed, and when the temperature is lower than 760 °C, the air damper 54 is interlocked and opened.

[0061] The incoming gas pressure of the natural gas in the station is 0.6 - 1 MPa. After passing through the primary pressure regulating valve 43, the pressure is 0.2 - 0.3 MPa. One way is used as the combustion-supporting gas for the volatile organic compounds and mixes with the gas phase of the volatile organic compounds and then enters the burner 51 for combustion; the other way passes through the secondary pressure regulating valve 44 and the pressure is 0.06 - 0.07 MPa, and then is used as the fuel for the pilot light 52 for combustion. The pilot light 52 is always in the combustion state; when the booster fan 35 is closed, the burner 51 stops burning; when the booster fan 35 is opened, the corresponding switch valve of the combustion-supporting natural gas (i.e., the second switch valve 411) is opened at the same time, and the burner 51 starts to burn by using the pilot light 52 for ignition.

[0062] During the train loading process, if an emergency such as a leakage of the train tank body occurs, the emergency liquid collection joint 92 can be connected to the train tank body structure, and the oil in the train tank can be quickly collected into the liquid collection tank 91 and then re-input into the storage tank 6 through the liquid collection pump 932.

[0063] Using this treatment system to treat the volatile organic compounds in the train trestle realizes the collection, treatment and emission of the volatile organic compounds during the train trestle loading process, solves the problems of insufficient treatment by the previous treatment devices, inability to achieve automatic control, high treatment cost, limited use conditions, etc. After treatment, the removal efficiency of non-methane total hydrocarbons is not less than 95%; the emission concentration of non-methane total hydrocarbons is less than 120 mg / m3; the concentration of nitrogen oxides is less than 60 mg / m3; the emission of volatile organic compounds is greatly reduced, and the final complete elimination of the volatile organic compound gas is achieved through the above treatment system.

[0064] Embodiment 2

[0065] This application also provides a method for treating volatile organic compounds, including:

[0066] S1. Collect the generated volatile organic compounds into the vent pipeline 1;

[0067] S2. Use the condensate tank 2 to preliminarily separate the volatile organic compounds collected in the vent pipeline 1;

[0068] S3. Deliver fuel to the pilot burner 52 in the combustion chamber 5 and the booster pipeline 3, and deliver the gas separated by the condensate tank 2 to the burner 51 in the combustion chamber 5 through the booster pipeline 3, and use the burner 51 to burn-treat the gas.

[0069] In the treatment method of this application, the generated volatile organic compounds are collected, mixed with fuel, and then delivered to the burner 51 for combustion treatment, which can decompose the volatile organic compounds more fully, with good treatment effect and low treatment cost, greatly reducing the emissions of volatile organic compounds and achieving thorough treatment of volatile organic compounds.

[0070] Further, step S3 further includes: real-time monitoring of the first pipeline pressure at the inlet end of the booster fan 35 provided on the booster pipeline 3 and the second pipeline pressure at the outlet end of the booster fan 35; when the booster fan 35 is in the closed state, when the first pipeline pressure is lower than the first preset value, turn on the booster fan 35; when the booster fan 35 is in the open state, when the second pipeline pressure is higher than the second preset value, turn off the booster fan 35.

[0071] Further, step S3 further includes: real-time monitoring of the flame temperature in the combustion chamber 5, and opening the air damper 54 of the combustion chamber 5 when the flame temperature is lower than the preset minimum temperature; closing the air damper 54 of the combustion chamber 5 when the flame temperature is higher than the preset maximum temperature.

[0072] Further, step S1 includes the following steps:

[0073] Fill the oil stored in the storage tank 6 into the storage tank to be filled through the loading arm 8 connected to the filling pipeline 7;

[0074] The volatile organic compounds generated by the oil in the loading arm 8 are delivered to the vent pipeline 1 through the exhaust pipe 81 connected in parallel to the loading arm 8;

[0075] In step S2, the liquid separated by the condensate tank 2 is delivered to the filling pipeline 7 through the oil collection pipeline 21.

[0076] The entire treatment method can be carried out using the treatment system in the first embodiment above. The specific treatment process has been described in detail in the above embodiment and will not be repeated here.

[0077] The above is only a schematic specific embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A treatment system for volatile organic compounds, characterized in that, it includes a vent pipeline, a condensate tank, a booster pipeline, a fuel pipeline and a combustion chamber, and a burner and a pilot burner are arranged in the combustion chamber; the vent pipeline is used to collect the generated volatile organic compounds, the vent pipeline is connected to the inlet of the condensate tank in a switchable manner, the gas-phase outlet of the condensate tank is connected to the first end of the booster pipeline in a switchable manner, and the second end of the booster pipeline is connected to the burner in a switchable manner; the fuel pipeline is connected to the pilot burner in a switchable manner and can supply fuel to the pilot burner, a fuel bypass is connected in parallel to the fuel pipeline, and the fuel bypass is connected to the booster pipeline in a switchable manner.

2. The treatment system for volatile organic compounds according to claim 1, characterized in that, a front pressure sensor, a booster fan and a rear pressure sensor are sequentially arranged on the booster pipeline from its first end to the second end; when the booster fan is in the closed state, the booster fan can be opened when the pipeline pressure detected by the front pressure sensor is lower than a first preset value; when the booster fan is in the open state, the booster fan can be closed when the pipeline pressure detected by the rear pressure sensor is higher than a second preset value.

3. The treatment system for volatile organic compounds according to claim 2, characterized in that, a hydrocarbon concentration flowmeter, a front switch valve, a rear switch valve, a front flame arrester and a rear flame arrester are further arranged on the booster pipeline, the hydrocarbon concentration flowmeter is arranged between the first end of the booster pipeline and the front pressure sensor, the front switch valve and the front flame arrester are sequentially arranged between the front pressure sensor and the booster fan along the fluid transportation direction, the rear switch valve and the rear flame arrester are sequentially arranged between the rear pressure sensor and the second end of the booster pipeline along the fluid transportation direction, and the connection point of the fuel bypass and the booster pipeline is located between the rear flame arrester and the second end of the booster pipeline.

4. The treatment system for volatile organic compounds according to claim 1, characterized in that, a primary pressure regulating valve, a secondary pressure regulating valve and a first switch valve are sequentially arranged on the fuel pipeline along the fluid transportation direction, the fuel bypass is connected in parallel between the primary pressure regulating valve and the secondary pressure regulating valve, and a second switch valve is arranged on the fuel bypass.

5. The treatment system for volatile organic compounds according to claim 1, characterized in that, a temperature detector and a damper are further arranged on the combustion chamber, the temperature detector is used to monitor the flame temperature in the combustion chamber in real time, the damper can be opened when the flame temperature is lower than a preset minimum temperature, and can also be closed when the flame temperature is higher than a preset maximum temperature.

6. The treatment system for volatile organic compounds according to claim 1, characterized in that, The treatment system for volatile organic compounds further includes an oil storage tank, a filling pipeline, a loading arm, and an exhaust pipe. The first end of the filling pipeline is connected to the oil storage tank, and the second end of the filling pipeline is a closed end. One end of the loading arm is connected to the filling pipeline in a switchable manner, and the other end is used to connect to the storage tank to be filled. One end of the exhaust pipe is connected to the loading arm in a bypass manner, and the other end is connected to the vent pipeline in a switchable bypass manner. The liquid phase outlet of the condensate tank is connected to the filling pipeline in a switchable bypass manner through an oil collection pipeline.

7. The treatment system for volatile organic compounds according to claim 6, wherein, the treatment system for volatile organic compounds further includes an emergency liquid collection pipeline with both ends closed, a liquid collection tank, and a plurality of emergency liquid collection connectors. Each of the emergency liquid collection connectors is connected to the emergency liquid collection pipeline in a switchable bypass manner. The liquid collection tank is connected in series to the emergency liquid collection pipeline, and the liquid collection tank is connected to the oil storage tank through a liquid collection pipeline.

8. A method for treating volatile organic compounds, wherein, it includes: S1. Collect the generated volatile organic compounds into the vent pipeline; S2. Use the condensate tank to preliminarily separate the volatile organic compounds collected in the vent pipeline; S3. Deliver fuel to the pilot burner and the pressurization pipeline in the combustion chamber, and deliver the gas separated by the condensate tank to the burner in the combustion chamber through the pressurization pipeline, and use the burner to perform combustion treatment on the gas.

9. The method for treating volatile organic compounds according to claim 8, wherein, step S3 further includes: continuously monitoring the first pipeline pressure at the inlet end of the pressurization fan provided on the pressurization pipeline and the second pipeline pressure at the outlet end of the pressurization fan; when the first pipeline pressure is lower than a first preset value in the state where the pressurization fan is closed, turn on the pressurization fan; when the second pipeline pressure is higher than a second preset value in the state where the pressurization fan is on, turn off the pressurization fan.

10. The method for treating volatile organic compounds according to claim 8, wherein, step S3 further includes: continuously monitoring the flame temperature in the combustion chamber, opening the air damper of the combustion chamber when the flame temperature is lower than the preset minimum temperature; closing the air damper of the combustion chamber when the flame temperature is higher than the preset maximum temperature.

11. The method for treating volatile organic compounds according to claim 8, wherein, step S1 includes the following steps: filling the oil stored in the oil storage tank into the storage tank to be filled through the loading arm connected to the filling pipeline; the volatile organic compounds generated by the oil in the loading arm are transported to the vent pipeline through the exhaust pipe bypassed on the loading arm; in step S2, the liquid separated by the condensate tank is transported into the filling pipeline through the oil collection pipeline.

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