CN111960373A - Method and device for recycling tertiary oil gas of gas station - Google Patents
Method and device for recycling tertiary oil gas of gas station Download PDFInfo
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- CN111960373A CN111960373A CN202010864703.4A CN202010864703A CN111960373A CN 111960373 A CN111960373 A CN 111960373A CN 202010864703 A CN202010864703 A CN 202010864703A CN 111960373 A CN111960373 A CN 111960373A
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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
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour
-
- 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
- B67D7/76—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators
-
- 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 Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method and a device for recycling tertiary oil gas in a gas station, which are used for recycling the oil gas in an oil tank, the device comprises a compressor, a cooler, a separator, a vacuum pump and a membrane module which are connected by pipelines, the compressor is used for extracting oil gas from the oil tank for compression treatment, the cooler is connected with the compressor, used for cooling the oil gas compressed by the compressor, the separator is connected with the cooler, used for separating the cooled oil gas into liquid gasoline and oil gas mixture and discharging the liquid gasoline from the bottom to an oil tank, the membrane component is connected with the separator, the oil-gas separator is used for separating the oil-gas mixture into super-saturated oil-gas and air, pumping the super-saturated oil-gas back to the oil tank through the vacuum pump and discharging the air into the atmosphere. The invention realizes the recovery of oil products, and has stable recovery performance and high safety.
Description
Technical Field
The invention relates to the technical field of oil gas recovery, in particular to a method and a device for recovering 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. Gasoline is a light oil product which is extremely volatile, and oil gas is generated in the processes of storage, loading, unloading, transportation and retail sale. The oil gas dissipated to the atmosphere is volatilized, so that the damage to surrounding residents is caused, the surrounding environment is polluted, and the potential danger of fire and explosion accidents exists.
In the operation process of the gas station, as the secondary oil gas recovery system installed on the fuel dispenser operates at a rated gas-liquid ratio of about 1.1-1.2 (namely 1.1-1.2L of gas is sucked every 1L of oil is released), the pressure in the oil storage tank can be increased due to the operation of the secondary oil gas recovery system and the increase of the ambient temperature. When the pressure rises to the pressure value set by the oil tank breather valve, the breather valve is opened, and high-pressure oil gas in the oil tank is discharged into the air to reduce the pressure in the oil tank so as to protect the oil tank. The direct discharge of a large amount of oil gas not only causes pollution to the air and does not meet the requirements of national environmental protection, but also causes economic loss to a certain extent due to the loss of the oil gas during the discharge.
Therefore, under the background of emphasizing safety, environmental protection, greenness and high efficiency in the field of gas stations, the oil gas recovery device and the method which can simultaneously meet the requirements of high and low tank pressures, oil recovery and safe discharge and have economic requirements are particularly urgent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a device for recycling tertiary oil gas of a gas station so as to recycle oil products.
In order to achieve the purpose, the invention provides the following technical scheme: a three-time oil gas recovery method for a gas station is used for recovering and treating oil gas in an oil tank and comprises the following steps:
s1, when the pressure in the oil tank reaches the preset starting pressure, the compressor extracts oil gas from the oil tank and compresses the oil gas;
s2, the compressed oil gas enters a cooler for cooling treatment and then is sent into a separator;
s3, separating oil and gas into liquid gasoline and an oil-gas mixture by the separator, discharging the liquid gasoline to an oil tank after the liquid gasoline is gathered at the bottom of the separator, and feeding the oil-gas mixture into a membrane module from the top of the separator;
s4, separating the oil-gas mixture into super-saturated oil-gas and air by the membrane module, pumping the super-saturated oil-gas back to the oil tank by the vacuum pump, and discharging the air to the atmosphere;
and S5, when the pressure in the oil tank is lower than the preset stop pressure or reaches the preset stop time, the compressor stops pumping oil gas from the oil tank.
Preferably, in S3, when the liquid gasoline is collected at the bottom of the separator, a drain valve connected to the separator is opened to drain the liquid gasoline stored in the separator to the oil tank.
Preferably, in S4, the membrane module includes a membrane shell and a membrane core, the outside of the membrane core is positive pressure, the inside of the membrane core is negative pressure, the supersaturated oil gas permeates into the inside of the membrane core from the outside of the membrane core, and the air flows out from between the outside of the membrane core and the membrane shell.
The invention also discloses a filling station tertiary oil gas recovery device, which comprises a compressor, a cooler, a separator, a vacuum pump and a membrane assembly, wherein the compressor is connected with a pipeline, the compressor is used for extracting oil gas from an oil tank for compression treatment, the cooler is connected with the compressor and is used for cooling the oil gas compressed by the compressor, the separator is connected with the cooler and is used for separating the cooled oil gas into liquid gasoline and an oil gas mixture, collecting the liquid gasoline and discharging the liquid gasoline from the bottom to the oil tank, sending the oil gas mixture into the membrane assembly from the top, and the membrane assembly is connected with the separator and is used for separating the oil gas mixture into super-saturated oil gas and air, pumping the super-saturated oil gas back to the oil tank through the vacuum pump and discharging the air to the atmosphere.
Preferably, the pipeline is provided with a first exhaust port, a first air inlet and an oil outlet, and the first air inlet and the oil outlet are communicated with the oil tank.
Preferably, the membrane module comprises a membrane shell and a membrane core, a central tube is arranged in the membrane core, and the membrane shell and the membrane core are concentrically arranged.
Preferably, a first exhaust fan and a second exhaust fan are respectively arranged on two sides of the cooler.
Preferably, the separator is further connected with a pipeline, and the pipeline is connected with the oil outlet.
Preferably, a hydrocarbon sensor is further arranged on the pipeline close to the first exhaust port and used for detecting the concentration of the discharged oil gas.
Preferably, the membrane module is provided with a second exhaust port, a second gas inlet and a second discharge port, the second exhaust port is communicated with the first gas inlet, the second gas inlet is communicated with the separator, and the second discharge port is communicated with the vacuum pump.
The invention has the beneficial effects that:
1. the method and the device for recycling the tertiary oil gas of the gas station not only realize recycling of oil products, but also effectively treat the pressure in the oil tank.
2. The method and the device for recycling the tertiary oil gas of the gas station have stable and reliable performance and high safety, and the emission can meet the national environmental protection requirement.
Drawings
FIG. 1 is a schematic structural view of a tertiary oil gas recovery device of a gasoline station of the present invention;
FIG. 2 is a schematic structural view of the tertiary oil and gas recovery device of the gasoline station of the present invention except the casing;
FIG. 3 is a schematic view of the structure of FIG. 1 from another angle;
FIG. 4 is a schematic cross-sectional view of a membrane assembly in the tertiary vapor recovery system of the gasoline station of the present invention;
fig. 5 is a schematic view of the principle of the tertiary oil and gas recovery device of the gasoline station of the present invention.
Reference numerals: 1. the tertiary oil gas recovery device comprises a gas station tertiary oil gas recovery device, 11, a shell, 12, a motor, 13, a compressor, 14, a cooler, 141, a first exhaust fan, 142, a second exhaust fan, 15, a separator, 151, a first exhaust port, 152, a pipeline, 153, a drain valve, 16, a membrane assembly, 161, a membrane shell, 162, a membrane core, 163, an end cover flange, 164, a second exhaust port, 165, a second air inlet, 166, a second exhaust port, 167, a central pipe, 17, a vacuum pump, 181, a first exhaust port, 182, a first air inlet, 183, an oil outlet, 184, a hydrocarbon sensor, 19, a pressure transmitter, 2, an oil tank, 21, oil gas, 22, liquid gasoline, 23, supersaturated oil gas, 3, a first pressure switch, 4, a second pressure switch, 5 and an explosion-proof junction box.
Detailed Description
The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.
Referring to fig. 1-3 and 5, the tertiary oil gas recovery device 1 for the gas station disclosed by the present invention includes a housing 11, and a motor 12, a compressor 13, a cooler 14, a separator 15, a membrane module 16, a vacuum pump 17 and a pipeline which are arranged in the housing 11, wherein the pipeline is provided with a first exhaust port 181, a first gas inlet 182 and an oil outlet 183, and both the first gas inlet 182 and the oil outlet 183 are communicated with an oil tank 2, and are configured to recover and process oil gas 21 in the oil tank 2. The first gas inlet 182 is connected to a pressure transmitter 19 for monitoring the pressure of the incoming oil or gas 21.
Referring to fig. 2 and 5, the motor 12 is connected to the compressor 13 through a belt 121, the motor 12 is configured to pump the oil gas 21 in the oil tank 2 into the compressor 13, the compressor 13 compresses the oil gas 21, the compressed oil gas 21 increases in pressure and temperature, and the compressed oil gas enters the cooler 14.
As shown in fig. 2 and 3, the compressed oil gas 21 enters the cooler 14 to exchange heat with air, the cooler 14 is connected with the compressor 13 through a pipeline, the first exhaust fan 141 and the second exhaust fan 142 are respectively installed on two sides of the cooler 14, the first exhaust fan 141 blows to the cooler 14 from the front side of the air, so that the heat exchange efficiency is improved, the second exhaust fan 142 is used for discharging the hot gas generated in the cooler 14 and the heat generated by the operation of the compressor 13, and the temperature of the oil gas 21 is greatly reduced after the cooler 14 is cooled. In this embodiment, the first exhaust fan 141 and the second exhaust fan 142 are used to cool the cooler 14, and in other embodiments of the present invention, other cooling methods may be used to cool the oil gas 21 in the cooler 14.
Referring to fig. 3 and 5, one end of the separator 15 is connected to the cooler 14 through a pipeline, the other end of the separator 15 is connected to the membrane module 16 through a pipeline, the separator 15 has a first discharge port 151, the first discharge port 151 is connected to the oil outlet 183 through a pipeline 152, and a drain valve 153 is disposed on the pipeline 152 near the discharge port 151. The separator 15 separates the oil gas 21 into liquid gasoline 22 and a mixture of oil gas, the liquid gasoline 22 is gathered at the bottom of the separator 15, and the mixture of oil gas is conveyed from the top of the separator 15 to the membrane module 16.
Preferably, a flow meter (not shown) is further disposed between the separator 15 and the oil tank 2, and the flow meter is used for metering the liquid gasoline 22 separated by the separator 15, so as to realize real-time metering of the liquid gasoline 22 and accumulation of the recovery flow.
Referring to fig. 4 and 5, the membrane module 16 includes a membrane shell 161 and a membrane core 162, both of which are cylindrical and concentrically disposed, the membrane core 162 is installed at the center of the membrane shell 161, and both ends of the membrane shell 161 are fixed by end cap flanges 163. The membrane module 16 has a second exhaust port 164, a second inlet port 165 and a second exhaust port 166, the second exhaust port 164 is communicated with the first exhaust port 181, the second inlet port 165 is communicated with the separator 15, and the second exhaust port 166 is communicated with the vacuum pump 17.
The oil-gas mixture separated by the separator 15 enters the membrane module 16 from the second air inlet 165, is separated into super-saturated oil-gas 23 and air in the membrane module 16, the super-saturated oil-gas 23 is discharged from the second discharge outlet 166 and is pumped back to the oil tank 2 by the vacuum pump 17, and the air is discharged after passing through the second exhaust outlet 164 and the first exhaust outlet 181. A gap is formed between the membrane shell 161 and the membrane core 162, the outer side of the membrane core 162 is positive pressure, the inner side of the membrane core 162 is negative pressure, and the membrane core 162 is a polymer membrane, so that the outer side of the membrane core 162 penetrates into the supersaturated oil gas 23 formed by only hydrocarbon molecules on the inner side of the membrane core 162 and enters the central pipe 167 of the membrane core, the central pipe 167 is communicated with the second discharge port 166, and then the supersaturated oil gas is pumped back to the oil tank 2 through the vacuum pump 17. The air is repelled by the membrane surface, and flows out only along the space between the outside of the membrane core 162 and the membrane housing 161, and is discharged as pure air to the atmosphere through the second discharge port 166. A hydrocarbon sensor 184 is arranged on the pipeline close to the first exhaust port 181 and used for detecting the concentration of oil gas in the exhaust air, and when the concentration of the oil gas is too high, the hydrocarbon sensor alarms and closes the second exhaust port 164.
Furthermore, gas station cubic vapor recovery system device 1 still includes first pressure switch 3, second pressure switch 4 and explosion-proof junction box 5, first pressure switch 3 and second pressure switch 4 are used for controlling whole device 1's pressure, explosion-proof junction box 5 is used for preventing that the external environment explosion from causing the circuit impaired, avoids the inside spark scheduling problem of circuit simultaneously, produces the potential safety hazard to external surrounding environment.
The principle of the tertiary oil gas recovery device of the gas station is as follows: firstly, when the pressure in the oil tank 2 reaches a preset starting pressure of 300pa, starting oil gas recovery processing by the three-time oil gas recovery device 1 of the gas station, namely extracting oil gas 21 from the oil tank 2 by a compressor 13 of the three-time oil gas recovery device 1 of the gas station through a motor 12 for compression processing, increasing the pressure of the compressed oil gas 21 to 0.3-0.5Mpa, and increasing the temperature to 110-130 ℃; then the compressed oil gas 21 enters the cooler 14 for cooling, the heat exchange efficiency is improved through the first exhaust fan 141, meanwhile, the generated heat is exhausted through the second exhaust fan 142, the cooled oil gas 21 is sent into the separator 15 after the temperature is reduced to 40-50 ℃, the separator 15 separates the oil gas 21 into liquid gasoline 22 and an oil gas mixture, the liquid gasoline 21 is gathered at the bottom of the separator 15, and the oil gas mixture enters the membrane module 16 from the top of the separator 15.
Then the membrane module 16 separates the oil-gas mixture into super-saturated oil-gas 23 and air, the super-saturated oil-gas 23 is pumped back to the oil tank 2 through the vacuum pump 17, the air is discharged to the hydrocarbon sensor 184 through the second discharge port 166, and after the air is detected by the hydrocarbon sensor 184 to reach the standard, the air is discharged to the atmosphere through the first discharge port 181; and finally, when the pressure of the oil tank 2 is lower than the preset stop pressure or the time for stopping the recovery work preset by the tertiary oil-gas recovery device 1 of the gas station is reached, the tertiary oil-gas recovery device 1 of the gas station automatically stops and is in a standby state, at the moment, the liquid discharge valve 153 is opened to discharge the liquid gasoline 22 back to the oil tank 2, and when the pressure of the oil tank 2 rises again to reach the preset pressure 300pa, the device 1 is started again, and the cycle is repeated.
Therefore, the invention discloses a method for recovering tertiary oil gas of a gas station, which comprises the following steps:
s1, when the pressure in the oil tank 2 reaches the preset starting pressure, the compressor 13 extracts the oil gas 21 from the oil tank 2 and performs compression treatment;
s2, the compressed oil gas 21 enters the cooler 14 for cooling treatment and then is sent to the separator 15;
s3, separating oil and gas by the separator 15 into liquid gasoline 22 and an oil-gas mixture, discharging the liquid gasoline 22 to the oil tank 2 after gathering at the bottom of the separator 15, and feeding the oil-gas mixture into the membrane module 16 from the top of the separator 15;
s4, separating the oil-gas mixture into super-saturated oil-gas 23 and air by the membrane module 16, pumping the super-saturated oil-gas 23 back to the oil tank 2 through the vacuum pump 17, and discharging the air to the atmosphere;
s5, when the pressure in the oil tank 2 is lower than the preset stop pressure or reaches the preset stop time, the compressor 13 stops pumping the oil gas 21 from the oil tank 2.
Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.
Claims (10)
1. A three-time oil gas recovery method for a gas station is used for recovering and treating oil gas in an oil tank, and is characterized by comprising the following steps:
s1, when the pressure in the oil tank reaches the preset starting pressure, the compressor extracts oil gas from the oil tank and compresses the oil gas;
s2, the compressed oil gas enters a cooler for cooling treatment and then is sent into a separator;
s3, separating oil and gas into liquid gasoline and an oil-gas mixture by the separator, discharging the liquid gasoline to an oil tank after the liquid gasoline is gathered at the bottom of the separator, and feeding the oil-gas mixture into a membrane module from the top of the separator;
s4, separating the oil-gas mixture into super-saturated oil-gas and air by the membrane module, pumping the super-saturated oil-gas back to the oil tank by the vacuum pump, and discharging the air to the atmosphere;
and S5, when the pressure in the oil tank is lower than the preset stop pressure or reaches the preset stop time, the compressor stops pumping oil gas from the oil tank.
2. The gasoline station tertiary oil gas recovery method as claimed in claim 1, wherein when the liquid gasoline is accumulated at the bottom of the separator in the S3, a drain valve connected to the separator is opened to discharge the liquid gasoline stored in the separator to the tank.
3. The gasoline station tertiary oil gas recovery method of claim 1, wherein in the S4, the membrane module includes a membrane shell and a membrane core, the outside of the membrane core is positive pressure, the inside of the membrane core is negative pressure, the super saturated oil gas permeates into the inside of the membrane core from the outside of the membrane core, and the air flows out from between the outside of the membrane core and the membrane shell.
4. The tertiary oil gas recovery device for the gas station is characterized by comprising a compressor, a cooler, a separator, a vacuum pump and a membrane assembly which are connected through pipelines, wherein the compressor is used for extracting oil gas from an oil tank to be compressed, the cooler is connected with the compressor and used for cooling the oil gas compressed by the compressor, the separator is connected with the cooler and used for separating the cooled oil gas into liquid gasoline and an oil gas mixture, collecting the liquid gasoline and discharging the liquid gasoline to the oil tank from the bottom, sending the oil gas mixture into the membrane assembly from the top, and the membrane assembly is connected with the separator and used for separating the oil gas mixture into super-saturated oil gas and air, pumping the super-saturated oil gas back to the oil tank through the vacuum pump and discharging the air to the atmosphere.
5. The tertiary oil and gas recovery device for the gas station as claimed in claim 4, wherein the pipeline is provided with a first exhaust port, a first gas inlet and an oil outlet, and the first gas inlet and the oil outlet are communicated with the oil tank.
6. The gas station tertiary oil and gas recovery device as claimed in claim 4, wherein the membrane module comprises a membrane shell and a membrane core, a central tube is arranged in the membrane core, and the membrane shell and the membrane core are concentrically arranged.
7. The tertiary oil and gas recovery device of a gasoline station as claimed in claim 4, wherein the cooler is provided with a first exhaust fan and a second exhaust fan at both sides thereof.
8. The filling station tertiary oil gas recovery device of claim 5, wherein the separator is further connected to a pipeline, the pipeline being connected to the oil outlet.
9. The tertiary oil and gas recovery device for a gas station as claimed in claim 5, wherein a hydrocarbon sensor is further disposed on the pipeline near the first exhaust port for detecting the concentration of the discharged oil and gas.
10. The tertiary oil and gas recovery device of a gas station as claimed in claim 5, wherein the membrane module has a second exhaust port, a second inlet port and a second exhaust port, the second exhaust port is in communication with the first exhaust port, the second inlet port is in communication with the separator, and the second exhaust port is in communication with the vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010864703.4A CN111960373A (en) | 2020-08-25 | 2020-08-25 | Method and device for recycling tertiary oil gas of gas station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010864703.4A CN111960373A (en) | 2020-08-25 | 2020-08-25 | Method and device for recycling tertiary oil gas of gas station |
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| CN111960373A true CN111960373A (en) | 2020-11-20 |
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| CN202010864703.4A Pending CN111960373A (en) | 2020-08-25 | 2020-08-25 | Method and device for recycling tertiary oil gas of gas station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849267A (en) * | 2022-04-22 | 2022-08-05 | 优必得石油设备(苏州)有限公司 | Oil-gas treatment system and method and separator |
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| CN102895836A (en) * | 2012-09-18 | 2013-01-30 | 中国石油集团东北炼化工程有限公司吉林设计院 | Oil gas recovering device for gasoline station |
| CN107456839A (en) * | 2017-09-14 | 2017-12-12 | 江苏航天惠利特环保科技有限公司 | Utilize the device for recovering oil and gas of condensation-adsorption method and absorption and the switching device of desorption |
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2020
- 2020-08-25 CN CN202010864703.4A patent/CN111960373A/en active Pending
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| CN1621131A (en) * | 2004-10-15 | 2005-06-01 | 黄道军 | Oil gas separating and reclaiming system and its separating and reclaiming method |
| CN201010519Y (en) * | 2007-03-01 | 2008-01-23 | 郑州永邦电气有限公司 | Film type condensed oil gas liquifying device used for oil gas recovery processing in gas station or oil house |
| CN201342313Y (en) * | 2008-10-28 | 2009-11-11 | 北京石油化工学院 | Oil gas recovery processing device adopting membrane method for refueling station |
| CN201415941Y (en) * | 2009-01-19 | 2010-03-03 | 许荣麟 | Oil-gas sealing, condensing, recycling and processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114849267A (en) * | 2022-04-22 | 2022-08-05 | 优必得石油设备(苏州)有限公司 | Oil-gas treatment system and method and separator |
| CN114849267B (en) * | 2022-04-22 | 2024-01-09 | 优必得石油设备(苏州)有限公司 | Oil gas treatment system and method and separator |
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Application publication date: 20201120 |