Coking VOCs (Volatile Organic Compounds) recycling system

Abstract

The invention relates to the technical field of VOCs recovery treatment, in particular to a coking VOCs tail gas recovery treatment system. The invention provides a coking VOCs recovery processing system which comprises a primary cooler, a coal gas fan and at least one VOCs gas storage tank, the primary cooler is provided with an input port and an output port, the VOCs gas storage tank is connected with the input port through a first pipeline, the coal gas fan is connected with the output port through a second pipeline, the VOCs gas storage tank comprises a tank body and a VOCs gas adjusting part, and the VOCs gas adjusting part is connected with the primary cooler. The VOCs gas adjusting part comprises a nitrogen control assembly, a diffusion assembly, a tail gas control assembly, an oxygen content detector and a pressure detector; the oxygen content detector is connected to the tank body and is used for detecting the oxygen content in the tank body; and the pressure detector is connected to the tank body and is used for detecting the pressure value in the tank body. By controlling the pressure and / or oxygen content of the tail gas, the VOCs tail gas is circulated in the coking gas purification system, and complete treatment of the tail gas and equipment safety are guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of VOCs recovery and treatment, and particularly to a coking VOCs tail gas recovery and treatment system. Background Art

[0002] The overall level of existing VOCs treatment technologies has been significantly improved, and various purification process technologies and routes have gradually become clear. For example, activated carbon / activated carbon fiber adsorption method, oxidation catalysis method, RTO / RCO furnace incineration method, biological purification method, etc. These technical routes basically require new equipment and a large amount of additional investment. Moreover, most of these technical methods still need to discharge waste gas into the atmosphere or need to treat "waste materials", resulting in new pollution.

[0003] The tail gas in the coking industry is mainly generated during the purification process of raw coke oven gas and during the product storage process. The tail gas composition is complex. It is difficult to completely treat the tail gas in the coking industry by adopting a single one of the above-mentioned VOCs treatment technologies, and the combination of multiple technologies requires too much investment. Summary of the Invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] To this end, the present disclosure provides a coking VOCs recovery and treatment system, including a primary cooler, a gas blower, and at least one VOCs gas storage tank. The primary cooler has an input port and an output port. The VOCs gas storage tank is connected to the input port through a first pipeline. The gas blower is connected to the output port through a second pipeline. The VOCs gas storage tank includes a tank body and a VOCs gas regulating part. The VOCs gas regulating part includes a nitrogen control component, a blow-off component, a tail gas control component, an oxygen content detector, and a pressure detector. Among them,

[0006] The nitrogen control component is connected to the tank body and is used to input nitrogen into the tank body; the blow-off component is connected to the tank body and is used to blow off the VOCs gas in the tank body; the tail gas control component is arranged on the first pipeline and is used to adjust the amount of the VOCs gas output from the tank body; the oxygen content detector is connected to the tank body and is used to detect the oxygen content in the tank body; the pressure detector is connected to the tank body and is used to detect the pressure value in the tank body.

[0007] In a feasible implementation, the nitrogen control component includes a nitrogen input pipeline and a plurality of nitrogen regulating valves. The nitrogen input pipeline has a nitrogen input end and a nitrogen output end, and the nitrogen output end is communicated with the tank body. The plurality of nitrogen regulating valves are arranged at intervals on the nitrogen input pipeline.

[0008] In a feasible implementation, it further includes a nitrogen bypass pipeline. The nitrogen bypass pipeline has a bypass input port and a bypass output port. The bypass input port and the bypass output port are communicated with the nitrogen input pipeline. The plurality of nitrogen regulating valves are arranged between the bypass input port and the bypass output port, and a bypass nitrogen regulating valve is arranged on the nitrogen bypass pipeline.

[0009] In a feasible implementation, the venting component includes a venting pipeline and a venting valve. The venting pipeline is communicated with the tank body. The venting valve is arranged on the venting pipeline, and the venting valve is used to adjust the venting amount of the venting pipeline.

[0010] In a feasible implementation, the tail gas control component includes a tail gas bypass pipeline and a plurality of tail gas regulating valves. A bypass tail gas regulating valve is arranged on the tail gas bypass pipeline. The tail gas bypass pipeline has a tail gas bypass input port and a tail gas bypass output port. The tail gas bypass input port and the tail gas bypass output port are communicated with the first pipeline, and the tail gas bypass input port is arranged on one side of the first pipeline close to the tank body. The plurality of tail gas regulating valves are arranged at intervals on the first pipeline between the tail gas bypass input port and the tail gas bypass output port.

[0011] In a feasible implementation, when the detection data of the oxygen content detector is:

[0012] When the oxygen content in the tank body is greater than 8% Vol and less than 10% Vol, an alarm command is triggered;

[0013] When the oxygen content in the tank body is greater than or equal to 10% Vol, the nitrogen control component and the venting component are opened, and the tail gas control component is closed;

[0014] When the oxygen content in the tank body is less than 8% Vol, the nitrogen control component and the venting component are closed, and the tail gas control component is opened.

[0015] In a feasible implementation, when the detection data of the pressure detector is:

[0016] When the pressure in the tank body is lower than 200 Pa, the nitrogen control component is opened;

[0017] When the pressure in the tank body is greater than 500 Pa, the nitrogen control component is closed;

[0018] When the pressure in the tank is greater than 900 Pa, the tail gas control assembly is turned on.

[0019] In a feasible implementation, the interlock detection priority of the oxygen content detector and the VOCs gas regulation unit is higher than that of the pressure detector and the VOCs gas regulation unit.

[0020] In a feasible implementation, the number of VOCs gas storage tanks is set to be multiple. Multiple VOCs gas storage tanks are connected in parallel to the first pipeline, and a buffer tank is arranged on the first pipeline. The buffer tank is arranged between the tail gas control assembly and the primary cooler.

[0021] In a feasible implementation, the buffer tank is provided with a buffer tank venting assembly. The buffer tank venting assembly includes a buffer tank venting pipeline and a buffer tank venting valve. The buffer tank venting pipeline is communicated with the buffer tank. The venting valve is arranged on the buffer tank venting pipeline, and the buffer tank venting valve is used to control the gas venting amount of the buffer tank venting pipeline.

[0022] The above description is only an overview of the technical solutions provided by the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented according to the content of the specification. And in order to make the above and other features and effects of the present disclosure more obvious and understandable, the embodiments of the present disclosure are specifically exemplified below. Description of the Drawings

[0023] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments that conform to the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0025] By reading the following detailed description of the exemplary embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the exemplary embodiments and are not considered as a limitation to the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0026] Figure 1 is the connection structure schematic diagram of the present disclosure;

[0027] Figure 2 is the structure schematic diagram of the VOCs gas storage tank of the present disclosure.

[0028] Among them, Figures 1 to 2 the corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0029] 1 - primary cooler; 2 - gas blower; 3 - VOCs gas storage tank; 31 - tank body; 32 - nitrogen control assembly; 321 - nitrogen input pipeline; 322 - nitrogen regulating valve; 323 - nitrogen bypass pipeline; 324 - bypass nitrogen regulating valve; 33 - venting assembly; 331 - venting pipeline; 332 - venting valve; 34 - tail gas control assembly; 341 - tail gas bypass pipeline; 342 - tail gas regulating valve; 343 - bypass tail gas regulating valve; 35 - oxygen content detector; 36 - pressure detector; 4 - first pipeline; 5 - second pipeline; 6 - buffer tank; 61 - buffer tank venting assembly; 611 - buffer tank venting pipeline; 612 - buffer tank venting valve. Detailed implementation manners

[0030] In order to more clearly understand the above - mentioned objects, features, and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0032] Currently, volatile organic compounds (English name: Volatile Organic Compounds), refer to organic compounds that have a relatively high saturated vapor pressure (greater than 13.33 Pa), low boiling point, small molecular weight, and are easily volatile at normal temperature under standard conditions. This kind of substance is one of the main pollutants in the atmosphere, commonly represented by VOC or VOCs, while total volatile organic compounds are represented by TVOC. It should be noted that VOCs do not refer to a specific pollutant, but a general term for a class of organic compounds with similar physical and chemical properties. The overall level of existing VOCs treatment technologies has been significantly improved, and various purification process technologies and routes have gradually become clear. For example, activated carbon / activated carbon fiber adsorption method, oxidation catalysis method, RTO / RCO furnace incineration method, biological purification method, etc. These technical routes basically require new equipment and a large amount of additional investment. Moreover, most of these technical methods still need to discharge waste gas into the atmosphere or need to treat "waste materials", generating new pollution. The tail gas in the coking industry is mainly generated during the purification process of raw coke oven gas and during product storage. The composition of the tail gas is complex. It is difficult to completely treat the tail gas in the coking industry by adopting a single one of the above - mentioned VOCs treatment technologies, and the combination of multiple technologies requires too much investment.

[0033] Based on this, embodiments of the present disclosure provide a coking VOCs recovery and treatment system.

[0034] The following is a detailed description of the coking VOCs recovery and treatment system through specific embodiments:

[0035] Referring to Figure 1 and 2 As shown, the present disclosure provides a coking VOCs recovery and treatment system, including a primary cooler 1, a gas blower 2, and at least one VOCs gas storage tank 3. The primary cooler 1 has an input port and an output port. The VOCs gas storage tank 3 is connected to the input port through a first pipeline 4, and the gas blower 2 is connected to the output port through a second pipeline 5. The VOCs gas storage tank 3 includes a tank body 31 and a VOCs gas regulating unit. The VOCs gas regulating unit includes a nitrogen control component 32, a venting component 33, a tail gas control component 34, an oxygen content detector 35, and a pressure detector 36. Among them, the nitrogen control component 32 is connected to the tank body 31, and the nitrogen control component 32 is used to input nitrogen into the tank body 31; the venting component 33 is connected to the tank body 31, and the venting component 33 is used to vent the VOCs gas in the tank body 31; the tail gas control component 34 is arranged in the first pipeline 4, and the tail gas control component 34 is used to regulate the amount of VOCs gas output from the tank body 31; the oxygen content detector 35 is connected to the tank body 31, and the oxygen content detector 35 is used to detect the oxygen content in the tank body 31; the pressure detector 36 is connected to the tank body 31, and the pressure detector 36 is used to detect the pressure value in the tank body 31.

[0036] The present disclosure utilizes the suction of the gas blower 2 to discharge the VOCs gas generated by the VOCs gas storage tank 3 into the primary cooler 1 through the first pipeline 4, and after being processed by the primary cooler 8, it returns to the gas purification system. It should be noted that the above-mentioned VOCs gas discharge method realizes the self-circulation of VOCs gas in the entire coking system, and the VOCs gas storage tank 3 is the product storage tank produced by the primary cooler 1. The present disclosure integrally sets the primary cooler 1 and the VOCs gas storage tank 3. The product produced by the primary cooler 1 will be introduced into the VOCs gas storage tank 3, and the VOCs gas generated in the VOCs gas storage tank 3 will be recycled into the primary cooler 1. The primary cooler 1 is a gas-liquid separation device, and the VOCs gas input into the primary cooler 1 will produce the product obtained by the primary cooler 1 again, enabling the present disclosure to not only realize the treatment of self-circulating VOCs gas but also increase the product output. The present disclosure relies on the existing facilities of the coking enterprise, namely the primary cooler 1, the gas blower 2, and the pipeline configuration. By controlling the tail gas pressure and oxygen content, the VOCs tail gas is circulated in the coking gas purification system to ensure the complete treatment of the tail gas and the safety of the equipment. The complete treatment of VOCs tail gas, less investment, safety, environmental protection, and easy implementation.

[0037] The VOCs gas storage tank 3 of the present disclosure includes a tank body 31 and a VOCs gas regulation unit. The VOCs gas regulation unit includes a nitrogen control assembly 32, a venting assembly 33, a tail gas control assembly 34, an oxygen content detector 35 (OISA), and a pressure detector 36 (PISA). By the alarm of the oxygen content detector 35 and being interlocked with the nitrogen control assembly 32, the venting assembly 33, and the tail gas control assembly 34, the oxygen content of the VOCs gas is controlled. By the interlock of the pressure detector 36 with the nitrogen control assembly 32 and the tail gas control assembly 34, a slightly positive pressure is maintained inside the tank body 31. Specifically, the first pipeline 4 and the second pipeline 5 of the present disclosure are existing pipeline designs in the coking field. The two can be any integral pipe material suitable for the coking field, or a pipeline network spliced by various materials and uses. For example, the first pipeline 4 connecting the tail gas control assembly 34 to the primary cooler 1 is set as the tail gas pipeline and consists of two pipelines, while the pipeline connecting the primary cooler 1 to the gas blower 2 is the gas pipeline, which meets the material requirements for gas transportation, etc.

[0038] In some embodiments, the nitrogen control assembly 32 includes a nitrogen input pipeline 321 and a plurality of nitrogen regulating valves 322. The nitrogen input pipeline 321 has a nitrogen input end and a nitrogen output end, and the nitrogen output end communicates with the tank body 31. The plurality of nitrogen regulating valves 322 are arranged at intervals on the nitrogen input pipeline 321.

[0039] In this embodiment, the plurality of nitrogen regulating valves 322 are arranged at intervals on the nitrogen input pipeline 321 to achieve precise regulation of nitrogen input. Specifically, the number of nitrogen regulating valves 322 is set to three.

[0040] In some embodiments, a nitrogen bypass pipeline 323 is further included. The nitrogen bypass pipeline 323 has a bypass input port and a bypass output port. The bypass input port and the bypass output port communicate with the nitrogen input pipeline 321. The plurality of nitrogen regulating valves 322 are arranged between the bypass input port and the bypass output port, and a bypass nitrogen regulating valve 322 is arranged on the nitrogen bypass pipeline 323.

[0041] In this embodiment, a bypass input port and a bypass output port are connected to a nitrogen input pipeline 321, and multiple nitrogen regulating valves 322 are disposed between the bypass input port and the bypass output port. The nitrogen bypass pipeline 323 can serve as a backup nitrogen input pipeline for use during maintenance of the multiple nitrogen regulating valves 322, and can also be used in conjunction with the multiple nitrogen regulating valves 322 to regulate the nitrogen input flow rate and flow velocity. During nitrogen input, the bypass nitrogen regulating valves 322 can be set to fully open, fully closed, or a certain opening. When the bypass nitrogen regulating valves 322 are fully closed, the nitrogen input flow rate is regulated by the multiple nitrogen regulating valves 322. When the bypass nitrogen regulating valves 322 are fully open, nitrogen entering the nitrogen input port is diverted to the nitrogen bypass pipeline 323, reducing the flow rate of the nitrogen input pipeline 321. The specific opening of the bypass nitrogen regulating valves 322 is calculated based on the nitrogen flow rate required for precise control.

[0042] In some embodiments, the relief assembly 33 includes a relief pipe 331 and a relief valve 332 . The relief pipe 331 is connected to the tank body 31 . The relief valve 332 is disposed on the relief pipe 331 . The relief valve 332 is used to adjust the relief amount of the relief pipe 331 .

[0043] In this embodiment, to control the pressure, nitrogen content, oxygen content, and other indicators within tank 31, purge assembly 33 is required to release a certain amount of gas. However, it should be noted that purge assembly 33 of the present disclosure does not release pure VOCs gas, but rather contains nitrogen, and release occurs only under specific conditions. Therefore, the amount of gas released by purge assembly 33 is extremely small. Furthermore, purge valves 332 can be provided in two configurations: an electric purge valve and a manual purge valve. The manual purge valve is located closer to tank 31 to prevent the electric purge valve from malfunctioning and requiring repair.

[0044] In some embodiments, the exhaust control component 34 includes an exhaust bypass pipeline 341 and multiple exhaust regulating valves 342. The exhaust bypass pipeline 341 is provided with a bypass exhaust regulating valve 342, and the exhaust bypass pipeline 341 has an exhaust bypass input port and an exhaust bypass output port. The exhaust bypass input port and the exhaust bypass output port are connected to the first pipeline 4, and the exhaust bypass input port is provided on the side of the first pipeline 4 close to the tank body 31. Multiple exhaust regulating valves 342 are provided at intervals on the first pipeline 4 between the exhaust bypass input port and the exhaust bypass output port.

[0045] In this embodiment, a plurality of tail gas regulating valves 342 are arranged at intervals on the first pipeline 4 between the tail gas bypass input port and the tail gas bypass output port to control the flow rate of the tail gas (VOCs gas) output from the tank body 31. In this embodiment, the purposes and technical effects of the tail gas bypass pipeline 341, the bypass tail gas regulating valve 342, and the plurality of tail gas regulating valves 342 are the same as those of the nitrogen control assembly 32, and the principle explanation will not be elaborated here.

[0046] In some embodiments, when the detection data of the oxygen content detector is that the oxygen content in the tank body 31 is greater than 8% Vol and less than 10% Vol, an alarm instruction is triggered; when the oxygen content in the tank body 31 is greater than or equal to 10% Vol, the nitrogen control assembly 32 and the relief assembly 33 are opened, and the tail gas control assembly 34 is closed; when the oxygen content in the tank body 31 is less than 8% Vol, the nitrogen control assembly 32 and the relief assembly 33 are closed, and the tail gas control assembly 34 is opened.

[0047] In this embodiment, when the oxygen content in the tank body 31 is less than 8% Vol, the nitrogen control assembly 32 and the relief assembly 33 are closed, and the tail gas control assembly 34 is opened to normally circulate the VOCs gas in the tank body 31. When the oxygen content in the tank body 31 is greater than 8% Vol and less than 10% Vol, an alarm instruction is triggered, and the staff needs to further confirm the oxygen content and analyze and respond to the increasing trend of the oxygen content in the tank body 31; when the oxygen content in the tank body 31 is greater than or equal to 10% Vol, the nitrogen control assembly 32 and the relief assembly 33 are opened. When the nitrogen control assembly 32 inputs nitrogen, the relief assembly 33 plays a certain pressure relief role. At this time, the tail gas control assembly 34 is closed and no longer outputs VOCs gas to prevent the excessive oxygen content in the VOCs gas from affecting the subsequent use in the gas system.

[0048] In some embodiments, when the detection data of the pressure detector 36 is that the pressure in the tank body 31 is lower than 200 Pa, the nitrogen control assembly 32 is opened; when the pressure in the tank body 31 is greater than 500 Pa, the nitrogen control assembly 32 is closed; when the pressure in the tank body 31 is greater than 900 Pa, the tail gas control assembly 34 is opened. The detection data of the pressure detector 36 in the present disclosure controls the tank body 31 to maintain a slightly positive pressure. Further, the interlock detection priority of the oxygen content detector and the VOCs gas regulating part is higher than the interlock detection priority of the pressure detector 36 and the VOCs gas regulating part.

[0049] In some embodiments, the number of VOCs gas storage tanks 3 is set to be multiple, and the multiple VOCs gas storage tanks 3 are connected in parallel to the first pipeline 4, and a buffer tank 6 is arranged on the first pipeline 4, and the buffer tank 6 is arranged between the tail gas control assembly 34 and the primary cooler 1.

[0050] In this embodiment, the number of VOCs gas storage tanks 3 is set to be multiple, and a buffer tank 6 is arranged between the tail gas control assembly 34 and the primary cooler. The buffer tank 6 serves as a pressure stabilizing device for the multiple VOCs gas storage tanks 3, ensuring that the VOCs gas collected from the multiple VOCs gas storage tanks 3 can have a stable output pressure.

[0051] In some embodiments, the buffer tank 6 is provided with a buffer tank venting assembly 61. The buffer tank venting assembly 61 includes a buffer tank venting pipeline 611 and a buffer tank venting valve 612. The buffer tank venting pipeline 611 is communicated with the buffer tank 6, and the venting valve 332 is arranged on the buffer tank venting pipeline 611, and the buffer tank venting valve 612 is used to control the gas venting amount of the buffer tank venting pipeline 611. In this embodiment, the purpose of setting the buffer tank venting assembly 61 of the present disclosure is to coordinate the pressure inside the buffer tank 6. Under the normal operating conditions of the VOCs gas cycle, the buffer tank venting assembly 61 is in a closed state, and is used for emergency pressure relief during maintenance or when one or more of the various VOCs gas regulating parts have problems.

[0052] In the present disclosure, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "multiple" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0053] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present disclosure.

[0054] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0055] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A coking VOCs recovery and treatment system, characterized in that It includes a primary cooler, a gas blower, and at least one VOCs gas storage tank. The primary cooler has an input port and an output port. The VOCs gas storage tank is connected to the input port through a first pipeline. The gas blower is connected to the output port through a second pipeline. The VOCs gas storage tank includes a tank body and a VOCs gas regulating part. The VOCs gas regulating part includes a nitrogen control component, a venting component, a tail gas control component, an oxygen content detector, and a pressure detector. Among them, The nitrogen control component is connected to the tank body and is used to input nitrogen into the tank body; the venting component is connected to the tank body and is used to vent the VOCs gas in the tank body; the tail gas control component is arranged on the first pipeline and is used to regulate the amount of VOCs gas output from the tank body; the oxygen content detector is connected to the tank body and is used to detect the oxygen content in the tank body; the pressure detector is connected to the tank body and is used to detect the pressure value in the tank body.

2. The coking VOCs recovery and treatment system according to claim 1, wherein The nitrogen control component includes a nitrogen input pipeline and a plurality of nitrogen regulating valves. The nitrogen input pipeline has a nitrogen input end and a nitrogen output end. The nitrogen output end is communicated with the tank body. The plurality of nitrogen regulating valves are arranged at intervals on the nitrogen input pipeline.

3. The coking VOCs recovery and treatment system according to claim 2, wherein, It further includes a nitrogen bypass pipeline. The nitrogen bypass pipeline has a bypass input port and a bypass output port. The bypass input port and the bypass output port are communicated with the nitrogen input pipeline. The plurality of nitrogen regulating valves are arranged between the bypass input port and the bypass output port. A bypass nitrogen regulating valve is arranged on the nitrogen bypass pipeline.

4. The coking VOCs recovery and treatment system according to claim 1, characterized in that, The venting component includes a venting pipeline and a venting valve. The venting pipeline is communicated with the tank body. The venting valve is arranged on the venting pipeline and is used to regulate the venting amount of the venting pipeline.

5. The coking VOCs recovery and treatment system according to claim 1, characterized in that, The tail gas control component includes a tail gas bypass pipeline and a plurality of tail gas regulating valves. A bypass tail gas regulating valve is arranged on the tail gas bypass pipeline. The tail gas bypass pipeline has a tail gas bypass input port and a tail gas bypass output port. The tail gas bypass input port and the tail gas bypass output port are communicated with the first pipeline. The tail gas bypass input port is arranged on the first pipeline on the side close to the tank body. The plurality of tail gas regulating valves are arranged at intervals on the first pipeline between the tail gas bypass input port and the tail gas bypass output port.

6. The coking VOCs recovery and treatment system according to claim 1, characterized in that, When the detection data of the oxygen content detector is: An alarm instruction is triggered when the oxygen content in the tank body is greater than 8%Vol and less than 10%Vol; When the oxygen content in the tank body is greater than or equal to 10%Vol, the nitrogen control component and the venting component are opened, and the tail gas control component is closed; When the oxygen content in the tank body is less than 8%Vol, the nitrogen control component and the venting component are closed, and the tail gas control component is opened.

7. The coking VOCs recovery and treatment system according to claim 1, characterized in that, When the detection data of the pressure detector is: The nitrogen control component is opened when the pressure in the tank body is lower than 200Pa; When the pressure in the tank is greater than 500 Pa, the nitrogen control component closes; When the pressure in the tank is greater than 900 Pa, the tail gas control component opens.

8. The coking VOCs recovery and treatment system according to claim 1, wherein, The interlock detection priority of the oxygen content detector and the VOCs gas regulation unit is higher than that of the pressure detector and the VOCs gas regulation unit.

9. The coking VOCs recovery and treatment system according to claim 1, wherein, The number of the VOCs gas storage tanks is set to be multiple. The multiple VOCs gas storage tanks are connected in parallel to the first pipeline, and a buffer tank is arranged on the first pipeline. The buffer tank is arranged between the tail gas control component and the primary cooler.

10. The coking VOCs recovery and treatment system according to claim 10, wherein, The buffer tank is provided with a buffer tank blow-off component. The buffer tank blow-off component includes a buffer tank blow-off pipeline and a buffer tank blow-off valve. The buffer tank blow-off pipeline is communicated with the buffer tank. The blow-off valve is arranged on the buffer tank blow-off pipeline, and the buffer tank blow-off valve is used for controlling the gas blow-off amount of the buffer tank blow-off pipeline.

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