阅读说明：本技术 加油站三次油气回收装置及方法 (Device and method for recycling tertiary oil gas of gas station ) 是由 程龙军 刘全桢 张健中 牟小冬 尹树孟 于辉 于 2018-09-03 设计创作，主要内容包括：本发明涉及一种加油站三次油气回收装置及方法,主要解决现有技术中存在排放不达标的问题。本发明通过采用一种加油站三次油气回收装置,包括风机、气体分布板、标准吸附罐、分隔板、浓度分析仪、叉车台,加油站埋地油罐顶部通过管线与风机入口相连,风机出口与标准吸附罐入口相连,标准吸附罐出口与浓度分析仪入口相连,浓度分析仪出口与烟囱相连,标准吸附罐坐落在叉车台上,标准吸附罐内设有分隔板,标准吸附罐入口和出口分别位于分隔板两侧,标准吸附罐气体入口设有气体分布板及方法的技术方案较好地解决了上述问题,可用于加油站三次油气回收中。(The invention relates to a device and a method for recycling tertiary oil gas of a gas station, which mainly solve the problem that the emission does not reach the standard in the prior art. The invention adopts a tertiary oil gas recovery device of a gas station, which comprises a fan, a gas distribution plate, a standard adsorption tank, a partition plate, a concentration analyzer and a forklift platform, wherein the top of a buried oil tank of the gas station is connected with an inlet of the fan through a pipeline, an outlet of the fan is connected with an inlet of the standard adsorption tank, an outlet of the standard adsorption tank is connected with an inlet of the concentration analyzer, an outlet of the concentration analyzer is connected with a chimney, the standard adsorption tank is positioned on the forklift platform, the partition plate is arranged in the standard adsorption tank, the inlet and the outlet of the standard adsorption tank are respectively positioned at two sides of the partition plate, and the gas distribution plate is arranged at the gas inlet of the standard adsorption tank.)

1. The utility model provides a cubic vapor recovery system device of filling station, the electric iron comprises a fan, gas distribution board, the standard adsorption tank, the division board, concentration analyzer, the fork truck platform, filling station buries the ground oil tank top and passes through the pipeline and link to each other with the fan entry, the fan export links to each other with the standard adsorption tank entry, the standard adsorption tank export links to each other with concentration analyzer entry, concentration analyzer export links to each other with the chimney, the standard adsorption tank is located fork truck bench, be equipped with the division board in the standard adsorption tank, standard adsorption tank entry and export are located the division board both sides respectively, standard adsorption tank gas inlet is equipped with gas distribution board.

2. The tertiary oil and gas recovery device for the gas station as claimed in claim 1, wherein the outlet of the blower is sequentially connected with the inlet valve, the inlet flange and the inlet of the standard adsorption tank.

3. The tertiary oil and gas recovery device for a gas station as claimed in claim 1, wherein the outlet of the standard adsorption tank is sequentially connected with the outlet flange, the outlet valve and the inlet of the concentration analyzer.

4. The tertiary oil and gas recovery device of the gas station as claimed in claim 1, wherein a partition plate is installed in the middle of the standard adsorption tank, and the ratio of the height of the partition plate to the height of the standard adsorption tank is 7/8; the division board divides into two parts about whole standard adsorption tank, and inlet valve installs in the half bottom on the left side of standard adsorption tank, and outlet valve installs in the half bottom on the right side of standard adsorption tank.

5. The tertiary oil and gas recovery device of a gas station as claimed in claim 1, wherein the inlet valve and the outlet valve are both at the bottom of the standard adsorption tank, thereby facilitating the operation of disassembling and replacing the standard adsorption tank flange.

6. The tertiary oil and gas recovery device for a gas station as claimed in claim 1, wherein when the standard adsorption tank is replaced, the inlet valve and the outlet valve are closed, the inlet flange and the outlet flange are removed, the standard adsorption tank is transported to a transport vehicle by using a forklift truck, the standard adsorption tank which has completed desorption is installed at the original position of the standard adsorption tank which is saturated in adsorption, the inlet flange and the outlet flange are connected, and the inlet valve and the outlet valve are opened.

7. The method for recycling the tertiary oil gas of the gas station adopts the tertiary oil gas recycling device of the gas station as claimed in claims 1 to 6, the buried oil tank of the gas station generates the external gasoline volatile gas, the external gasoline volatile gas is pumped to the inlet flange through the fan, after the gasoline volatile gas enters the standard adsorption tank from the inlet flange, the gasoline volatile gas moves from bottom to top at the left half part of the standard adsorption tank after entering the standard adsorption tank, and moves from top to bottom at the right half part of the standard adsorption tank after reaching the top of the standard adsorption tank, and reaches the bottom of the standard adsorption tank, and the gasoline volatile gas is adsorbed by the adsorbent, and the oil gas discharged from the standard adsorption tank is detected by the concentration analyzer and then reaches the standard for discharge.

8. The process of claim 7 andthe tertiary oil gas recovery unit of oil station, its operating condition that characterized in that standard adsorption tank is: the temperature is-30 to 40 ℃, the pressure is 0 to 1kpa, and the filling amount of the adsorbent is 0.5 to 1.5m³。

9. The method of claim 7, characterized in that the adsorbent is activated carbon or molecular sieve.

10. The method of claim 7, wherein the concentration analyzer analyzes the concentration of the tail gas discharged from the outlet valve, and the setting of the concentration analyzer is 25g/m³The concentration alarm value indicates that the standard adsorption tank needs to be replaced after the alarm is given; and (3) transporting the standard adsorption tank with saturated adsorption to a fixed-point treatment plant for vacuum desorption and hot nitrogen purging, desorbing the oil gas adsorbed in the standard adsorption tank, and then recovering the tertiary oil gas of the gas station by using the standard active adsorption tank.

Technical Field

The invention relates to a device and a method for recycling tertiary oil gas of a gas station.

Background

With the rapid development of economy in China, the automobile keeping quantity is increased year by year, and gas stations are increasing day by day. In the operation process, volatile oil gas discharged from a buried storage tank of a gas station continuously climbs, and the volatile oil gas wastes resources, causes pollution to the atmosphere and influences the surrounding environment.

The oil gas recovery of the gas station mainly comprises primary, secondary and tertiary oil gas recovery, namely: the primary oil gas recovery of the gas station refers to the transformation of an oil discharge system of the underground oil tank; the secondary oil gas recovery refers to the reconstruction of a recovery type oil gun and the construction of an oil gas recovery pipeline; the tertiary oil gas recovery means that a post-treatment device is installed, and oil gas is recovered into gasoline by methods such as condensation, adsorption and the like. The oil gas recovery system is used for processing oil gas exhaled from the oil storage tank in the oil product storage process, and the tertiary oil gas recovery system needs to be installed at a gas station which finishes the transformation of the secondary oil gas recovery system. The working principle is that the oil gas pressure in the oil storage tank reaches the starting condition of the tertiary oil gas recovery device, the tertiary oil gas recovery device is started, and the oil gas in the oil storage tank is converted into liquid state and returns to the liquid collecting tank or the oil storage tank.

GB 20952 and 2007 atmospheric pollutant emission Standard of gas station set by China in 2007 stipulates the emission limit of oil gas of the gas station, and the gas station is required to be provided with a tertiary oil gas recovery device, and the emission concentration of tail gas of the device is not higher than 25g/m³. At present, only a gasoline station in Beijing area is provided with a rear-end oil gas recovery device, most of the provinces do not carry out related work, and the gasoline station has about 10 thousands seats in China, so that the social demand is very large.

At present, the rear-end oil gas recovery device of a gas station used at home and abroad generally adopts an adsorption method or a membrane method, and the two processes lack an effective and cheap 'gas-to-liquid' recovery mode, so that high-concentration oil gas always circulates between the existing oil gas recovery device and a buried tank, and cannot reach the standard along with the increase of the application time.

Disclosure of Invention

One of the technical problems to be solved by the invention is that the emission in the prior art is not up to standard, and the invention provides a novel tertiary oil gas recovery device for a gas station, which has the advantage of up to standard emission. The second technical problem to be solved by the present invention is to provide a method for recovering tertiary oil gas of a gas station corresponding to the first technical problem to be solved.

In order to solve one of the problems, the technical scheme adopted by the invention is as follows: the utility model provides a cubic vapor recovery system device of filling station, the electric iron comprises a fan, gas distribution board, the standard adsorption tank, the division board, concentration analyzer, the fork truck platform, filling station buries the ground oil tank top and passes through the pipeline and link to each other with the fan entry, the fan export links to each other with the standard adsorption tank entry, the standard adsorption tank export links to each other with concentration analyzer entry, concentration analyzer export links to each other with the chimney, the standard adsorption tank is located fork truck bench, be equipped with the division board in the standard adsorption tank, standard adsorption tank entry and export are located the division board both sides respectively, standard adsorption tank gas inlet is equipped with gas distribution board.

Among the above-mentioned technical scheme, preferably, the fan export links to each other with inlet valve, entry flange, standard adsorption tank entry in proper order.

Among the above-mentioned technical scheme, preferably, standard adsorption tank export links to each other with export flange, outlet valve, concentration analysis appearance entry in proper order.

In the above technical solution, preferably, the middle part of the standard adsorption tank is provided with a partition plate, and the ratio of the height of the partition plate to the height of the standard adsorption tank is 7/8; the division board divides into two parts about whole standard adsorption tank, and inlet valve installs in the half bottom on the left side of standard adsorption tank, and outlet valve installs in the half bottom on the right side of standard adsorption tank.

Among the above-mentioned technical scheme, preferably, entry valve and outlet valve all are in standard adsorption tank bottom, make things convenient for the operation of standard adsorption tank flange dismantlement change jar.

Among the above-mentioned technical scheme, preferably, when changing standard adsorption tank, close inlet valve and outlet valve, dismantle inlet flange and outlet flange, utilize the fork truck platform to transport standard adsorption tank to the transport vechicle on, will accomplish the standard adsorption tank of desorption and install in adsorbing saturated standard adsorption tank original position, connect inlet flange and outlet flange, open inlet valve and outlet valve.

In order to solve the second problem, the invention adopts the following technical scheme: the utility model provides a filling station cubic vapor recovery system method, adopt filling station cubic vapor recovery system device, filling station buried oil tank produces outer petrol volatile gas of arranging, the petrol volatile gas of arranging is pumped to the entry flange through the fan, after petrol volatile gas gets into standard adsorption tank from the entry flange, petrol volatile gas gets into standard adsorption tank after, from down up moving in standard adsorption tank left half, from up down moving on standard adsorption tank right half after reaching standard adsorption tank top, reach standard adsorption tank bottom, petrol volatile gas passes through the absorption of adsorbent and discharges up to standard after concentration analyzer detects from standard adsorption tank exhaust oil gas.

In the above technical solution, preferably, the operating conditions of the standard adsorption tank are as follows: the temperature is-30 to 40 ℃, the pressure is 0 to 1kpa, and the filling amount of the adsorbent is 0.5 to 1.5m³。

In the above technical solution, preferably, the adsorbent is activated carbon or molecular sieve.

In the above technical solution, preferably, the concentration analyzer analyzes the concentration of the tail gas discharged from the outlet valve, and is set to 25g/m³The concentration alarm value indicates that the standard adsorption tank needs to be replaced after the alarm is given; the standard adsorption tank with saturated adsorption is transported to a fixed-point treatment plant for vacuum desorption and hot nitrogen purging, and the adsorbed oil gas in the standard adsorption tank is desorbed, so that the standard active adsorption tank can be used for tertiary oil gas recovery of a gas station.

Compared with the prior art, the standardized activated carbon tank can adsorb and recover the gasoline volatile gas discharged from the buried storage tank of the gas station, and prevent the uncontrolled escape of the gasoline gas; the standardized activated carbon tank of the device can be quickly replaced, and the problem that the three-time oil gas recovery continuous emission of a gas station reaches the standard can be conveniently and quickly solved by replacing the standard activated carbon tank with saturated adsorption with the standard activated carbon tank which is subjected to desorption; the concentration analyzer of the device can detect the emission concentration to perform early warning, change the standard adsorption tank when the early warning is achieved, realize the continuous emission of the three-time oil gas recovery of the gas station and reach the standard, and obtain better technical effects.

Drawings

FIG. 1 is a schematic flow diagram of the process of the present invention.

In the figure 1, a buried oil tank, 2, a fan, 3, an inlet valve, 4, an inlet flange, 5, a gas distribution plate, 6, a standard adsorption tank, 7, a partition plate, 8, an outlet flange, 9, an outlet valve, 10, a concentration analyzer, 11, a discharge chimney, 12 and a forklift platform.

The present invention will be further illustrated by the following examples, but is not limited to these examples.

Detailed Description

[ example 1 ]

A device and a method for recovering tertiary oil gas of a gas station, as shown in fig. 1, the device and the method for recovering tertiary oil gas of a gas station comprise: the device comprises a fan 2, an inlet flange 4, a gas distribution plate 5, a standard adsorption tank 6, a partition plate 7, an outlet flange 8, a concentration analyzer 10 and a forklift platform 12; the average discharge of the buried oil tank 1 of the gas station is about 5m per hour³The oil gas of utilizing fan 2 to pump the outer oil gas of burying 1 ground oil tank of filling station to standard adsorption tank 6, through the adsorption of active carbon, most oil gas adsorbs in the active carbon, and other up to standard gas discharges to the atmosphere through arranging chimney 11 outward.

The buried oil tank 1 of filling station produces outer petrol volatile gas of arranging, pumps outer petrol volatile gas to entry flange 4 through fan 1, installs entry valve 3 between fan 2 and the entry flange 4. After the gasoline volatile gas enters the standard adsorption tank 6 from the inlet flange 4, the residual gas reaching the standard after the gasoline volatile gas is adsorbed by the activated carbon is discharged out of the standard adsorption tank 6 from the outlet flange 8. The oil gas discharged from the standard adsorption tank 6 is detected by a concentration analyzer 10 and then discharged to the atmosphere through an exhaust chimney. An outlet valve 9 is arranged between the outlet flange 8 and the concentration analyzer 10.

The operating conditions for the standard adsorption tanks were: the operation temperature is-30 deg.C, the pressure is 500pa, and the adsorbent packing amount is 1m³. The adsorbent is activated carbon.

A gas distribution plate 5 is arranged in the bottom of the standard adsorption tank 6, an inlet valve 4 is arranged at the bottom of the left half part of the standard adsorption tank 6, a partition plate 7 is arranged in the middle of the standard adsorption tank 6, the whole standard adsorption tank 6 is divided into a left part and a right part, and the ratio of the height of the partition plate to the height of the standard adsorption tank is 7/8; the inlet valve 8 is arranged at the bottom of the left half part 5 of the standard adsorption tank 6, and activated carbon is arranged in the standard adsorption tank 6 above the gas distribution plate 5 and used for adsorbing oil gas entering the standard adsorption tank 6. The standard canister 6, inlet valve 4 and outlet valve 8 are skid mounted on the forklift truck bed 12 as a whole.

After the gasoline volatile gas enters the standard adsorption tank 6 from the inlet flange 4, the gasoline volatile gas moves from bottom to top on the left half part of the standard adsorption tank 6, moves from top to bottom on the right half part of the standard adsorption tank 6 after reaching the top of the standard adsorption tank 6, and is discharged out of the standard adsorption tank 6 through the outlet flange 8 after reaching the bottom of the standard adsorption tank 6. The cellular-type overall arrangement makes petrol volatilize gas more abundant with the active carbon contact about the standard adsorption tank 6, and adsorption effect is better, and inlet valve 4 and outlet valve 8 all in the 6 bottoms of standard adsorption tank, makes things convenient for the flange of standard adsorption tank 6 to dismantle and trades a jar operation.

The concentration analyzer 10 analyzes the concentration of the exhaust gas discharged from the outlet valve 8, and is set at 25g/m³The alarm value is a concentration alarm value, and the standard adsorption tank 6 needs to be replaced after the alarm is sent out. When the standard adsorption tank 6 is replaced, the inlet valve 3 and the outlet valve 9 are closed, the inlet flange 4 and the outlet flange 8 are disassembled, the standard adsorption tank 6 is conveyed to a transport vehicle by using the forklift platform 12, and the standard activated carbon tank 6 which is subjected to desorption is installed in the original position of the standard adsorption tank 6 which is saturated in adsorption. The inlet flange 4 and the outlet flange 8 are connected, and the inlet valve 3 and the outlet valve 9 are opened.

The standard adsorption tank 6 with saturated adsorption is transported to a fixed-point treatment plant for vacuum desorption and hot nitrogen purging, oil gas adsorbed by the active carbon in the standard adsorption tank 6 is separated from active carbon pores, and the standard adsorption tank 6 can be used for three-time oil gas recovery of a gas station.

The operation result shows that the tank replacement period of the standard adsorption tank is 13 days, the tank replacement time is 10 minutes each time, and the concentration of the discharged oil gas is always less than 25g/m³And the emission reaching the standard is realized.

[ example 2 ]

A device and a method for recovering tertiary oil gas of a gas station, as shown in fig. 1, the device and the method for recovering tertiary oil gas of a gas station comprise: the device comprises a fan 2, an inlet flange 4, a gas distribution plate 5, a standard adsorption tank 6, a partition plate 7, an outlet flange 8, a concentration analyzer 10 and a forklift platform 12; the average discharge of the buried oil tank 1 of the gas station is about 5m per hour³The oil gas of utilizing fan 2 to pump the outer oil gas of burying 1 ground oil tank of filling station to standard adsorption tank 6, through the adsorption of active carbon, most oil gas adsorbs in the active carbon, and other up to standard gas discharges to the atmosphere through arranging chimney 11 outward.

The buried oil tank 1 of filling station produces outer petrol volatile gas of arranging, pumps outer petrol volatile gas to entry flange 4 through fan 1, installs entry valve 3 between fan 2 and the entry flange 4. After the gasoline volatile gas enters the standard adsorption tank 6 from the inlet flange 4, the residual gas reaching the standard after the gasoline volatile gas is adsorbed by the activated carbon is discharged out of the standard adsorption tank 6 from the outlet flange 8. The oil gas discharged from the standard adsorption tank 6 is detected by a concentration analyzer 10 and then discharged to the atmosphere through an exhaust chimney. An outlet valve 9 is arranged between the outlet flange 8 and the concentration analyzer 10.

The operating conditions for the standard adsorption tanks were: the operation temperature is 5 ℃, the pressure is 800kpa, and the adsorbent packing amount is 1.5m³. The adsorbent is activated carbon.

A gas distribution plate 5 is arranged in the bottom of the standard adsorption tank 6, an inlet valve 4 is arranged at the bottom of the left half part of the standard adsorption tank 6, a partition plate 7 is arranged in the middle of the standard adsorption tank 6, the whole standard adsorption tank 6 is divided into a left part and a right part, and the ratio of the height of the partition plate to the height of the standard adsorption tank is 7/8; the inlet valve 8 is arranged at the bottom of the left half part 5 of the standard adsorption tank 6, and activated carbon is arranged in the standard adsorption tank 6 above the gas distribution plate 5 and used for adsorbing oil gas entering the standard adsorption tank 6. The standard canister 6, inlet valve 4 and outlet valve 8 are skid mounted on the forklift truck bed 12 as a whole.

After the gasoline volatile gas enters the standard adsorption tank 6 from the inlet flange 4, the gasoline volatile gas moves from bottom to top on the left half part of the standard adsorption tank 6, moves from top to bottom on the right half part of the standard adsorption tank 6 after reaching the top of the standard adsorption tank 6, and is discharged out of the standard adsorption tank 6 through the outlet flange 8 after reaching the bottom of the standard adsorption tank 6. The cellular-type overall arrangement makes petrol volatilize gas more abundant with the active carbon contact about the standard adsorption tank 6, and adsorption effect is better, and inlet valve 4 and outlet valve 8 all in the 6 bottoms of standard adsorption tank, makes things convenient for the flange of standard adsorption tank 6 to dismantle and trades a jar operation.

The concentration analyzer 10 analyzes the concentration of the exhaust gas discharged from the outlet valve 8, and is set at 25g/m³The alarm value is a concentration alarm value, and the standard adsorption tank 6 needs to be replaced after the alarm is sent out. When the standard adsorption tank 6 is replaced, the inlet valve 3 and the outlet valve 9 are closed, the inlet flange 4 and the outlet flange 8 are disassembled, the standard adsorption tank 6 is conveyed to a transport vehicle by using the forklift platform 12, and the standard activated carbon tank 6 which is subjected to desorption is installed in the original position of the standard adsorption tank 6 which is saturated in adsorption. The inlet flange 4 and the outlet flange 8 are connected, and the inlet valve 3 and the outlet valve 9 are opened.

The standard adsorption tank 6 with saturated adsorption is transported to a fixed-point treatment plant for vacuum desorption and hot nitrogen purging, oil gas adsorbed by the active carbon in the standard adsorption tank 6 is separated from active carbon pores, and the standard adsorption tank 6 can be used for three-time oil gas recovery of a gas station.

The operation result shows that the tank replacement period of the standard adsorption tank is 9 days, the tank replacement time is 10 minutes each time, and the concentration of the discharged oil gas is always less than 25g/m³And the emission reaching the standard is realized.

[ example 3 ]

A device and a method for recovering tertiary oil gas of a gas station, as shown in fig. 1, the device and the method for recovering tertiary oil gas of a gas station comprise: the device comprises a fan 2, an inlet flange 4, a gas distribution plate 5, a standard adsorption tank 6, a partition plate 7, an outlet flange 8, a concentration analyzer 10 and a forklift platform 12; the average discharge of the buried oil tank 1 of the gas station is about 5m per hour³The oil gas of utilizing fan 2 to pump the outer oil gas of burying 1 ground oil tank of filling station to standard adsorption tank 6, through the adsorption of active carbon, most oil gas adsorbs in the active carbon, and other up to standard gas discharges to the atmosphere through arranging chimney 11 outward.

The buried oil tank 1 of filling station produces outer petrol volatile gas of arranging, pumps outer petrol volatile gas to entry flange 4 through fan 1, installs entry valve 3 between fan 2 and the entry flange 4. After the gasoline volatile gas enters the standard adsorption tank 6 from the inlet flange 4, the residual gas reaching the standard after the gasoline volatile gas is adsorbed by the activated carbon is discharged out of the standard adsorption tank 6 from the outlet flange 8. The oil gas discharged from the standard adsorption tank 6 is detected by a concentration analyzer 10 and then discharged to the atmosphere through an exhaust chimney. An outlet valve 9 is arranged between the outlet flange 8 and the concentration analyzer 10.

The operating conditions for the standard adsorption tanks were: the operation temperature is 40 ℃, the pressure is 1kpa, and the adsorbent packing amount is 0.5m³. The adsorbent is activated carbon.

A gas distribution plate 5 is arranged in the bottom of the standard adsorption tank 6, an inlet valve 4 is arranged at the bottom of the left half part of the standard adsorption tank 6, a partition plate 7 is arranged in the middle of the standard adsorption tank 6, the whole standard adsorption tank 6 is divided into a left part and a right part, and the ratio of the height of the partition plate to the height of the standard adsorption tank is 7/8; the inlet valve 8 is arranged at the bottom of the left half part 5 of the standard adsorption tank 6, and activated carbon is arranged in the standard adsorption tank 6 above the gas distribution plate 5 and used for adsorbing oil gas entering the standard adsorption tank 6. The standard canister 6, inlet valve 4 and outlet valve 8 are skid mounted on the forklift truck bed 12 as a whole.

After the gasoline volatile gas enters the standard adsorption tank 6 from the inlet flange 4, the gasoline volatile gas moves from bottom to top on the left half part of the standard adsorption tank 6, moves from top to bottom on the right half part of the standard adsorption tank 6 after reaching the top of the standard adsorption tank 6, and is discharged out of the standard adsorption tank 6 through the outlet flange 8 after reaching the bottom of the standard adsorption tank 6. The cellular-type overall arrangement makes petrol volatilize gas more abundant with the active carbon contact about the standard adsorption tank 6, and adsorption effect is better, and inlet valve 4 and outlet valve 8 all in the 6 bottoms of standard adsorption tank, makes things convenient for the flange of standard adsorption tank 6 to dismantle and trades a jar operation.

The concentration analyzer 10 analyzes the concentration of the exhaust gas discharged from the outlet valve 8, and is set at 25g/m³The alarm value is a concentration alarm value, and the standard adsorption tank 6 needs to be replaced after the alarm is sent out. When the standard adsorption tank 6 is replaced, the inlet valve 3 and the outlet valve 9 are closed, the inlet flange 4 and the outlet flange 8 are disassembled, the standard adsorption tank 6 is conveyed to a transport vehicle by using the forklift platform 12, and the standard activated carbon tank 6 which is subjected to desorption is installed in the original position of the standard adsorption tank 6 which is saturated in adsorption. The inlet flange 4 and the outlet flange 8 are connected, and the inlet valve 3 and the outlet valve 9 are opened.

The standard adsorption tank 6 with saturated adsorption is transported to a fixed-point treatment plant for vacuum desorption and hot nitrogen purging, oil gas adsorbed by the active carbon in the standard adsorption tank 6 is separated from active carbon pores, and the standard adsorption tank 6 can be used for three-time oil gas recovery of a gas station.

The operation result shows that the tank replacement period of the standard adsorption tank is 6 days, the tank replacement time is 10 minutes each time, and the concentration of the discharged oil gas is always less than 25g/m³And the emission reaching the standard is realized.