CN112390220A - Oil gas emission treatment device and method for gas station - Google Patents

Oil gas emission treatment device and method for gas station Download PDF

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Publication number
CN112390220A
CN112390220A CN202011442086.5A CN202011442086A CN112390220A CN 112390220 A CN112390220 A CN 112390220A CN 202011442086 A CN202011442086 A CN 202011442086A CN 112390220 A CN112390220 A CN 112390220A
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China
Prior art keywords
valve body
pipeline
tank
parameter
adsorption
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Pending
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CN202011442086.5A
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Chinese (zh)
Inventor
李晓帅
渠恒彬
石晓刚
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ZHENGZHOU WINDBELL ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY CO.,LTD.
Zhengzhou Yongbang measurement and Control Technology Co., Ltd;
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Zhengzhou Handao Environmental Protection Technology Co ltd
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Priority to CN202011442086.5A priority Critical patent/CN112390220A/en
Publication of CN112390220A publication Critical patent/CN112390220A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/36—Arrangements of flow- or pressure-control valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/80—Arrangements of heating or cooling devices for liquids to be transferred

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation Of Gases By Adsorption (AREA)

Abstract

The invention provides a gas station oil gas emission treatment device and a gas station oil gas emission treatment method using the same, wherein the device comprises: the oil tank, the first pipeline, the second pipeline and the first adsorption tank and the second adsorption tank are used for carrying out oil-gas exchange between the oil tank and the first adsorption tank and between the oil tank and the second adsorption tank, and the first adsorption tank and the second adsorption tank work alternately. The condenser is arranged on the second pipeline, high-temperature and high-concentration oil gas desorbed from the adsorption tank enters the condenser, the temperature is reduced to normal temperature, and part of the oil gas is condensed into liquid state and returns to the underground oil tank.

Description

Oil gas emission treatment device and method for gas station
Technical Field
The invention relates to the technical field of oil-gas emission equipment, in particular to a device and a method for treating oil-gas emission of a gas station.
Background
During the processes of refueling, unloading and storing, a large amount of oil gas can be generated in the gas station to volatilize, and the oil gas volatilization has serious hazards of environmental pollution, damage to human health, flammability, explosiveness and the like. Developed countries such as Europe and America have worked out corresponding laws and regulations for oil gas recovery and treatment in the 80 th generation of the 20 th century, China has also successively developed corresponding national standards in 2008, and has forcibly required a gas station to carry out oil gas recovery and treatment, and related oil gas recovery equipment is installed in Beijing and surrounding areas. In the related equipment of the oil gas recovery system of the gas station, an oil gas emission treatment device is one of the main equipment, and is used for purifying the oil gas to be emitted so as to enable the air emitted into the atmosphere to reach the national standard.
The working principle of the oil gas emission treatment device in the prior art mainly comprises a condensation method, a membrane separation method, a combination method of condensation and membrane separation, a carbon adsorption method and a solvent absorption method. After the adsorbent adsorbs saturation in the carbon adsorption method, the desorption is extracted by a vacuum pump, the temperature of the residual oil gas after treatment is higher than the ambient temperature, and when the oil gas with higher temperature is recovered to the oil tank, the oil gas in the oil gas is volatilized to be aggravated, and the oil gas in the oil tank is expanded. The result of this is that the hydrocarbon treatment process has a certain degree of side effects on hydrocarbon recovery. Particularly in summer, after high-temperature oil gas returns to the underground storage tank, the pressure of the underground storage tank system is not easy to reach a balanced state.
Disclosure of Invention
Therefore, it is necessary to provide a device and a method for processing oil and gas discharge of a gas station, aiming at the problem that the pressure in a tank is unbalanced due to oil and gas returning to the tank in the existing oil and gas discharge equipment of the gas station.
The above purpose is realized by the following technical scheme:
a gasoline station oil and gas emission treatment device comprising: the device comprises an oil tank, a first pipeline, a second pipeline, a first adsorption tank and a second adsorption tank;
one end of the first pipeline is communicated with the oil tank, a first pressure sensor, a buffer tank, an adsorption pump, a first valve body and a second valve body are sequentially arranged on the first pipeline, the first pressure sensor is used for detecting the pressure in the oil tank, the buffer tank is communicated with an inlet of the adsorption pump, an outlet of the adsorption pump is communicated with the first valve body and the second valve body in a parallel mode, the first valve body is communicated with the first adsorption tank, and the second valve body is communicated with the second adsorption tank;
one end of the second pipeline is communicated with the oil tank, a third valve body, a fourth valve body, a desorption pump and a condenser are sequentially arranged on the second pipeline, the third valve body is communicated with the first adsorption tank, the fourth valve body is communicated with the second adsorption tank, the third valve body and the fourth valve body are communicated with an inlet of the desorption pump in a parallel connection mode, an outlet of the desorption pump is communicated with the condenser, and the condenser is communicated with the oil tank;
the bottom of the buffer tank is communicated with the second pipeline, and a fifth valve body is arranged on the second pipeline close to the buffer tank;
the first adsorption tank is provided with a first detection assembly for detecting operation parameters in the first adsorption tank, the first adsorption tank is provided with a first discharge pipeline and a first air supplement pipeline, the first discharge pipeline is provided with a first exhaust valve, and the first air supplement pipeline is provided with a first air supplement valve;
the second adsorption tank is provided with a second detection assembly for detecting operation parameters in the second adsorption tank, the second adsorption tank is provided with a second discharge pipeline and a second air supplement pipeline, the second discharge pipeline is provided with a second exhaust valve, and the second air supplement pipeline is provided with a second air supplement valve.
In one embodiment, the first and second detection assemblies each include a pressure sensor and a temperature sensor.
In one embodiment, the first exhaust valve, the second exhaust valve, the first gulp valve, and the second gulp valve are all one-way valves.
In one embodiment, an air supply regulating valve is arranged on the first air supply pipeline and/or the second air supply pipeline.
The invention also provides a gasoline station oil gas emission treatment method, which applies the gasoline station oil gas emission treatment device in any one of the embodiments and comprises the following steps:
s10, presetting a parameter A1 and comparing the parameter A with a parameter B1 detected by a first pressure sensor;
s20, when the detection parameter B1 is larger than the preset parameter A1, starting the adsorption pump, and executing the step S30; when the detection parameter B1 is less than or equal to the preset parameter A1, the adsorption pump is stopped, the fifth valve body is opened and is closed after the preset time T1 lasts, and the step S10 is returned;
s30, the first valve body and the second valve body are opened alternately, and the total time T2 of the first valve body and the second valve body is recorded;
s40, when the time T2 is larger than the preset time T3, the first valve body and the second valve body are closed, the third valve body and the fourth valve body are opened, and the desorption pump and the condenser are started.
In one embodiment, the temperature parameter B2 detected by the first detection assembly is compared with a preset temperature parameter A2, the temperature parameter B3 detected by the second detection assembly is compared with a preset temperature parameter A3, and the first valve body and the second valve body are closed when the temperature parameter B2 is greater than A2 and/or the temperature parameter B3 is greater than A3.
In one embodiment, the vacuum degree parameter B4 detected by the first detection assembly is compared with a preset vacuum degree parameter A4, the vacuum degree parameter B5 detected by the second detection assembly is compared with a preset temperature parameter A5, and when the vacuum degree parameter B4 is smaller than A4 and/or the vacuum degree parameter B5 is smaller than A5, the device alarms.
The invention has the beneficial effects that:
the invention provides a gas station oil gas emission treatment device and a gas station oil gas emission treatment method using the same, wherein the device comprises: the oil tank, the first pipeline, the second pipeline and the first adsorption tank and the second adsorption tank are used for carrying out oil-gas exchange between the oil tank and the first adsorption tank and between the oil tank and the second adsorption tank, and the first adsorption tank and the second adsorption tank work alternately. The condenser is arranged on the second pipeline, high-temperature and high-concentration oil gas desorbed from the adsorption tank enters the condenser, the temperature is reduced to normal temperature, and part of the oil gas is condensed into liquid state and returns to the underground oil tank.
Drawings
Fig. 1 is a schematic structural diagram of an oil and gas emission treatment device of a gas station according to an embodiment of the present invention.
Wherein:
a first pipeline 1; a first pressure sensor 2; a buffer tank 3; an adsorption pump 4; a first valve body 5; a second valve body 5'; a third valve body 6; a fourth valve body 6'; a first adsorption tank 7; a second adsorption tank 7'; a first detection assembly 8; a second detection assembly 8'; a first exhaust valve 10; a second exhaust valve 10'; a first gulp valve 12; a second gulp valve 12'; an air supply regulating valve 14; a desorption pump 15; a condenser 16; a drain valve 17; a second conduit 19; an oil tank 20.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below by way of embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The numbering of the components themselves, such as "first", "second", etc., is used herein only to distinguish between the objects depicted and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention provides a gas oil discharge processing device of a gas station, as shown in figure 1, comprising: the oil tank 20, the first pipeline 1, the second pipeline 19, the first adsorption tank 7 and the second adsorption tank 7'.
One end of a first pipeline 1 is communicated with an oil tank 20, a first pressure sensor 2, a buffer tank 3, an adsorption pump 4, a first valve body 5 and a second valve body 5 'are sequentially arranged on the first pipeline 1, the first pressure sensor 2 is used for detecting the pressure in the oil tank 20, the buffer tank 3 is communicated with an inlet of the adsorption pump 4, an outlet of the adsorption pump 4 is communicated with the first valve body 5 and the second valve body 5' in a parallel mode, the first valve body 5 is communicated with a first adsorption tank 7, and the second valve body 5 'is communicated with a second adsorption tank 7'.
One end of a second pipeline 19 is communicated with an oil tank 20, a third valve body 6, a fourth valve body 6', a desorption pump 15 and a condenser 16 are sequentially arranged on the second pipeline 19, the third valve body 6 is communicated with the first adsorption tank 7, the fourth valve body 6' is communicated with the second adsorption tank 7', the third valve body 6 and the fourth valve body 6' are communicated with an inlet of the desorption pump 15 in a parallel mode, an outlet of the desorption pump 15 is communicated with the condenser 16, and the condenser 16 is communicated with the oil tank 20.
The bottom of the buffer tank 3 is communicated with the second pipeline 19, and a fifth valve body is arranged on the second pipeline 19 close to the buffer tank 3.
Be provided with first detection element 8 on the first adsorption tank 7 for detect the operating parameter in the first adsorption tank 7, be provided with first discharge line and first air supplement pipeline on the first adsorption tank 7, be provided with first exhaust valve 10 on the first discharge line, be provided with first air supplement valve 12 on the first air supplement pipeline.
The second adsorption tank 7 'is provided with a second detection assembly 8' for detecting operation parameters in the second adsorption tank 7', the second adsorption tank 7' is provided with a second discharge pipeline and a second air supplement pipeline, the second discharge pipeline is provided with a second exhaust valve 10', and the second air supplement pipeline is provided with a second air supplement valve 12'.
The first pipeline 1 is used for admitting air, it links to each other with 20 gaseous phase exports of oil tank, first pipeline 1 gets into equipment and is connected to the 3 entrys of buffer tank, first pressure sensor 2 sets up on first pass, the 3 exports of buffer tank link to each other with 4 entrys of adsorption pump, the export of adsorption pump 4 is through the first valve body 5 of alternative work, the second valve body 5' links to each other with the first adsorption tank 7 of alternative work, second adsorption tank 7' bottom respectively, set up first detection component 8 on first adsorption tank 7, the second adsorption tube respectively, second detection component 8' is used for monitoring the state of adsorption tank.
When the whole oil gas emission treatment device is in standby, the first pressure sensor 2 monitors the pressure in the oil tank 20 in real time, and when the pressure reaches a set value, the adsorption pump 4 is started to input the oil gas in the oil tank 20 into the first adsorption tank 7 and the second adsorption tank 7 'which alternately work through the first valve body 5 and the second valve body 5' which alternately work. In the adsorption tank, utilize high-efficient adsorbent to separate oil gas in the adsorption tank, the vast majority oil gas is adsorbed on the adsorbent, and the air up to standard that separates is discharged into the atmosphere from the exhaust pipe through first discharge valve 10 and second discharge valve 10'. If the pressure in the oil tank 20 drops to the set standby value during this period, the apparatus enters a standby state, and the drain valve 17 temporarily opens the accumulated liquid in the drain buffer tank 3 during standby. When the first adsorption tank 7 and the second adsorption tank 7 'work, the first detection component 8 and the second detection component 8' monitor the parameters in the tanks in real time, and if the parameters exceed the preset range, the adsorption tanks stop working. When the adsorption separation in the adsorption tank reaches the set time, the first valve body 5 or the second valve body 5 'is closed when the adsorption of the adsorbent tends to saturation and does not penetrate, the third valve body 6 or the fourth valve body 6' is opened, the desorption pump 15 is started, the oil gas adsorbed in the adsorption tank is pumped out by the desorption pump 15, and the adsorbent in the adsorption tank is subjected to vacuum desorption. During vacuum desorption, the first detection assembly 8 or the second detection assembly 8' monitor the vacuum degree in the tank, and if the vacuum degree does not reach the standard, the equipment gives an alarm. The desorbed high-temperature high-concentration oil gas enters a condenser 16, the temperature is reduced to normal temperature, and part of the oil gas is condensed into liquid state and returns to the underground oil tank 20. In the embodiment, because the temperature of the oil gas discharged from the oil return port of the device tends to the ambient temperature after cooling, the problem that the temperature of the oil gas treated by the previous similar equipment is higher than the temperature of the oil gas in the oil tank 20, so that the volatilization of the gasoline in the oil tank 20 and the expansion of the oil gas are accelerated is solved.
In one embodiment, the first sensing assembly 8 and the second sensing assembly 8' each include a pressure sensor and a temperature sensor.
In one embodiment, the first exhaust valve 10, the second exhaust valve 10', the first gulp valve 12 and the second gulp valve 12' are all one-way valves.
In one embodiment, an air supply adjusting valve 14 is arranged on the first air supply pipeline and/or the second air supply pipeline.
The invention also provides a gasoline station oil gas emission treatment method, which applies the gasoline station oil gas emission treatment device in any one of the embodiments and comprises the following steps:
s10, presetting a parameter A1 and comparing the parameter A with a parameter B1 detected by a first pressure sensor;
s20, when the detection parameter B1 is larger than the preset parameter A1, starting the adsorption pump, and executing the step S30; when the detection parameter B1 is less than or equal to the preset parameter A1, the adsorption pump is stopped, the fifth valve body is opened and is closed after the preset time T1 lasts, and the step S10 is returned;
s30, alternately opening the first valve body and the second valve body, and recording the total opening time T2 of the first valve body and the second valve body;
and S40, when the time T2 is greater than the preset time T3, closing the first valve body and the second valve body, opening the third valve body and the fourth valve body, and starting the desorption pump and the condenser.
In one embodiment, the temperature parameter B2 detected by the first sensing assembly is compared with a preset temperature parameter a2, the temperature parameter B3 detected by the second sensing assembly is compared with a preset temperature parameter A3, and the first and second valve bodies are closed when the temperature parameter B2 is greater than a2 and/or the temperature parameter B3 is greater than A3.
In one embodiment, the vacuum degree parameter B4 detected by the first detection assembly is compared with a preset vacuum degree parameter A4, the vacuum degree parameter B5 detected by the second detection assembly is compared with a preset temperature parameter A5, and when the vacuum degree parameter B4 is smaller than A4 and/or the vacuum degree parameter B5 is smaller than A5, the device alarms.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (7)

1. A gasoline station oil gas emission processing device, characterized by comprising: the device comprises an oil tank, a first pipeline, a second pipeline, a first adsorption tank and a second adsorption tank;
one end of the first pipeline is communicated with the oil tank, a first pressure sensor, a buffer tank, an adsorption pump, a first valve body and a second valve body are sequentially arranged on the first pipeline, the first pressure sensor is used for detecting the pressure in the oil tank, the buffer tank is communicated with an inlet of the adsorption pump, an outlet of the adsorption pump is communicated with the first valve body and the second valve body in a parallel mode, the first valve body is communicated with the first adsorption tank, and the second valve body is communicated with the second adsorption tank;
one end of the second pipeline is communicated with the oil tank, a third valve body, a fourth valve body, a desorption pump and a condenser are sequentially arranged on the second pipeline, the third valve body is communicated with the first adsorption tank, the fourth valve body is communicated with the second adsorption tank, the third valve body and the fourth valve body are communicated with an inlet of the desorption pump in a parallel connection mode, an outlet of the desorption pump is communicated with the condenser, and the condenser is communicated with the oil tank;
the bottom of the buffer tank is communicated with the second pipeline, and a fifth valve body is arranged on the second pipeline close to the buffer tank;
the first adsorption tank is provided with a first detection assembly for detecting operation parameters in the first adsorption tank, the first adsorption tank is provided with a first discharge pipeline and a first air supplement pipeline, the first discharge pipeline is provided with a first exhaust valve, and the first air supplement pipeline is provided with a first air supplement valve;
the second adsorption tank is provided with a second detection assembly for detecting operation parameters in the second adsorption tank, the second adsorption tank is provided with a second discharge pipeline and a second air supplement pipeline, the second discharge pipeline is provided with a second exhaust valve, and the second air supplement pipeline is provided with a second air supplement valve.
2. The gasoline station hydrocarbon emission treatment device of claim 1, wherein the first and second detection assemblies each include a pressure sensor and a temperature sensor.
3. The gasoline station hydrocarbon discharge treatment apparatus of claim 1, wherein the first vent valve, the second vent valve, the first gulp valve and the second gulp valve are all one-way valves.
4. A gasoline station oil and gas emission treatment device according to claim 1, characterized in that an air supply adjusting valve is arranged on the first air supply pipeline and/or the second air supply pipeline.
5. A gasoline station oil and gas emission treatment method, characterized in that the gasoline station oil and gas emission treatment device of any one of claims 1-4 is applied, and comprises the following steps:
s10, presetting a parameter A1 and comparing the parameter A with a parameter B1 detected by a first pressure sensor;
s20, when the detection parameter B1 is larger than the preset parameter A1, starting the adsorption pump, and executing the step S30; when the detection parameter B1 is less than or equal to the preset parameter A1, the adsorption pump is stopped, the fifth valve body is opened and is closed after the preset time T1 lasts, and the step S10 is returned;
s30, the first valve body and the second valve body are opened alternately, and the total time T2 of the first valve body and the second valve body is recorded;
s40, when the time T2 is larger than the preset time T3, the first valve body and the second valve body are closed, the third valve body and the fourth valve body are opened, and the desorption pump and the condenser are started.
6. The gasoline station hydrocarbon emission treatment method of claim 5, wherein the temperature parameter B2 detected by the first detection assembly is compared with a preset temperature parameter A2, the temperature parameter B3 detected by the second detection assembly is compared with a preset temperature parameter A3, and the first valve body and the second valve body are closed when the temperature parameter B2 is greater than A2 and/or the temperature parameter B3 is greater than A3.
7. The gasoline station oil and gas emission treatment method of claim 5, wherein the vacuum degree parameter B4 detected by the first detection assembly is compared with a preset vacuum degree parameter A4, the vacuum degree parameter B5 detected by the second detection assembly is compared with a preset temperature parameter A5, and when the vacuum degree parameter B4 is less than A4 and/or the vacuum degree parameter B5 is less than A5, the device alarms.
CN202011442086.5A 2020-12-08 2020-12-08 Oil gas emission treatment device and method for gas station Pending CN112390220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011442086.5A CN112390220A (en) 2020-12-08 2020-12-08 Oil gas emission treatment device and method for gas station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011442086.5A CN112390220A (en) 2020-12-08 2020-12-08 Oil gas emission treatment device and method for gas station

Publications (1)

Publication Number Publication Date
CN112390220A true CN112390220A (en) 2021-02-23

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ID=74625649

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011442086.5A Pending CN112390220A (en) 2020-12-08 2020-12-08 Oil gas emission treatment device and method for gas station

Country Status (1)

Country Link
CN (1) CN112390220A (en)

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