The oil and gas emission treatment device, SEPA Emission Standard for Air Pollutants at Gas Stations is defined as “oil and gas that is partially discharged from the refueling oil and gas recovery system. The oil and gas discharged from this part are recovered through the use of adsorption, absorption, condensation, and membrane separation methods. Treatment device."
2, save energy;
3. Protecting the Earth for the benefit of future generations;
4, eliminate security risks.
A recovery is for the transformation of tanker cars. Take airtight measures and use a hose to connect the breathing valve on the gas station tank to the tank car to form a return air line. When the tanker unloads oil through the oil unloading line, the oil and gas in the gas station tank returns to the tanker through the return air line. To achieve the purpose of oil and gas recovery. Tankers bring oil and gas back to the tanks for processing. However, the existing tanker basically has problems of not sealing, and generally it leaks light on the way back to the oil depot; and most of the oil depots are not equipped with oil and gas recovery and treatment devices, and they are usually let go. Based on the current situation, a single recovery can hardly achieve the effect of energy conservation and emission reduction.
The secondary recovery is a modification of the refueling machine refueling gun. Using a gas refuelling gun with a gas return pipe, while refueling the car, use a vacuum pump to pump the oil and gas in the car's fuel tank back to the gas station tank. The "Air Station Air Pollutant Discharge Standard" stipulates that the secondary recovery system has a gas-to-liquid ratio of 1 to 1.2:1. Some refueling guns do not seal and suck a large amount of air into the tank. This excess gas requires three oil and gas recovery systems.
Adsorption method, the use of activated carbon, silica gel or activated fiber adsorbents on the size of the oil / air mixture adsorption force, to achieve the separation of oil and gas and air. Oil and gas pass through adsorbents such as activated carbon, oil and gas components are adsorbed on the surface of the adsorbent, and then subjected to vacuum desorption or steam desorption. The enriched oil and gas are pumped to a tank or liquefied by other methods; activated carbon and other adsorbents The adsorption of air is very small, and unadsorbed exhaust gas is discharged through the exhaust pipe.
The condensation method uses refrigeration technology to displace the heat of oil and gas to achieve direct conversion of oil and gas components from gas phase to liquid phase. Gasoline emission treatment equipment for gas stations using pure condensation method is also used, but to reach the emission standards must reach very low temperatures, energy consumption is relatively large, taking into account the gas station gas processing capacity is not very large, not much economical. At present, oil and gas processing facilities at gas stations mostly use the “condensation+adsorption†or “condensation+membrane†methods, while pure condensing methods are mostly used in oil refineries and oil depots, where large amounts of oil and gas are generated, and can reach a certain level of investment. response rate.
"Condensation + Adsorption" method, first condenses oil and gas to about -40 degrees, so that most of the oil and gas liquefaction, the remaining oil and gas through the adsorption tank for adsorption, because the adsorption can achieve high recovery, the emission concentration is also low, can reach the national standard. In addition, the condensed low-temperature oil and gas also effectively prevent the activated carbon adsorption bed from being prone to high-temperature hot spots. At the same time, the problem of deep cold energy consumption is avoided. This process is mature and widely used. Currently using this process there are companies such as Jiangsu Huilite.
“Condensation+membrane†method, the condensed gas is then separated by a polymer membrane, the discharge effect is good, the recovery efficiency of gasoline is high, but the cost of the membrane is also high. Currently, Zhengzhou Yongbang and other companies adopt this process, And Yongbang also took the lead in obtaining a non-electrical explosion proof certificate for the compressor.
Both primary and tertiary recovery can be handled together with oil and gas emission treatment devices. Shanghai is brewing this policy.
Secondary refueling refueling guns with gas return pipes, which currently cannot be produced in China mainly rely on imports, are expensive, easily damaged, and have a service life of about one year. Production companies include the United States OPW and other companies.
Why do you have to deal with oil and gas emissions
1, pollute the environment and endanger human health; 2, save energy;
3. Protecting the Earth for the benefit of future generations;
4, eliminate security risks.
One-time recovery system
One-time recovery system, ie offloading oil and gas recovery system. The State Environmental Protection Administration's "Emission Standards for Air Pollutants at Gas Stations" is defined as "the system that collects oil and gas generated when unloading gasoline from tank cars and enters tanks in sealed tanks." A recovery is for the transformation of tanker cars. Take airtight measures and use a hose to connect the breathing valve on the gas station tank to the tank car to form a return air line. When the tanker unloads oil through the oil unloading line, the oil and gas in the gas station tank returns to the tanker through the return air line. To achieve the purpose of oil and gas recovery. Tankers bring oil and gas back to the tanks for processing. However, the existing tanker basically has problems of not sealing, and generally it leaks light on the way back to the oil depot; and most of the oil depots are not equipped with oil and gas recovery and treatment devices, and they are usually let go. Based on the current situation, a single recovery can hardly achieve the effect of energy conservation and emission reduction.
Secondary recovery system
Secondary recovery system, that is, refueling oil and gas recovery system. The State Environmental Protection Administration's "Emission Standards for Air Pollutants at Gas Stations" is defined as "systems that will generate oil and gas for petrol tanks and collect them into buried tanks in a closed manner." The secondary recovery is a modification of the refueling machine refueling gun. Using a gas refuelling gun with a gas return pipe, while refueling the car, use a vacuum pump to pump the oil and gas in the car's fuel tank back to the gas station tank. The "Air Station Air Pollutant Discharge Standard" stipulates that the secondary recovery system has a gas-to-liquid ratio of 1 to 1.2:1. Some refueling guns do not seal and suck a large amount of air into the tank. This excess gas requires three oil and gas recovery systems.
Triple recovery system
The three-time recovery system refers to the oil and gas emission treatment device. The oil and gas that can be collected by the refueling gun with the function of recovering oil and gas when the gas-liquid ratio is greater than 1 and discharged from the exhaust pipe, and the oil and gas discharged when the buried oil tank generates positive pressure with the change of atmospheric pressure and temperature. The three recovery methods generally include four methods: adsorption, absorption, condensation, and membrane separation. Application status of oil and gas emission treatment devices
With the promulgation and implementation of the “Gas Station Air Pollutant Emission Standardâ€, more and more applications of oil and gas emission treatment devices have been implemented. The current mainstream processes include adsorption, condensation, condensation+adsorption, and condensation+membrane. Adsorption method, the use of activated carbon, silica gel or activated fiber adsorbents on the size of the oil / air mixture adsorption force, to achieve the separation of oil and gas and air. Oil and gas pass through adsorbents such as activated carbon, oil and gas components are adsorbed on the surface of the adsorbent, and then subjected to vacuum desorption or steam desorption. The enriched oil and gas are pumped to a tank or liquefied by other methods; activated carbon and other adsorbents The adsorption of air is very small, and unadsorbed exhaust gas is discharged through the exhaust pipe.
The condensation method uses refrigeration technology to displace the heat of oil and gas to achieve direct conversion of oil and gas components from gas phase to liquid phase. Gasoline emission treatment equipment for gas stations using pure condensation method is also used, but to reach the emission standards must reach very low temperatures, energy consumption is relatively large, taking into account the gas station gas processing capacity is not very large, not much economical. At present, oil and gas processing facilities at gas stations mostly use the “condensation+adsorption†or “condensation+membrane†methods, while pure condensing methods are mostly used in oil refineries and oil depots, where large amounts of oil and gas are generated, and can reach a certain level of investment. response rate.
"Condensation + Adsorption" method, first condenses oil and gas to about -40 degrees, so that most of the oil and gas liquefaction, the remaining oil and gas through the adsorption tank for adsorption, because the adsorption can achieve high recovery, the emission concentration is also low, can reach the national standard. In addition, the condensed low-temperature oil and gas also effectively prevent the activated carbon adsorption bed from being prone to high-temperature hot spots. At the same time, the problem of deep cold energy consumption is avoided. This process is mature and widely used. Currently using this process there are companies such as Jiangsu Huilite.
“Condensation+membrane†method, the condensed gas is then separated by a polymer membrane, the discharge effect is good, the recovery efficiency of gasoline is high, but the cost of the membrane is also high. Currently, Zhengzhou Yongbang and other companies adopt this process, And Yongbang also took the lead in obtaining a non-electrical explosion proof certificate for the compressor.
Both primary and tertiary recovery can be handled together with oil and gas emission treatment devices. Shanghai is brewing this policy.
Secondary refueling refueling guns with gas return pipes, which currently cannot be produced in China mainly rely on imports, are expensive, easily damaged, and have a service life of about one year. Production companies include the United States OPW and other companies.
Difference between oil and gas discharge treatment equipment and oil and gas recovery equipment
The oil and gas emission treatment equipment is mainly for gas stations to achieve the effect of controlling the emission of oil and gas pollutants. The oil and gas recovery equipment is mainly used in oil refineries, oil depots and other units with relatively large oil and gas production capacity. To greater economic benefits. Mini concrete mixer can be used to mix dry hard concrete, plastic concrete, flow concrete, light aggregate concrete and various mortars, so they were popular in precast concrete plants, industrial and civil construction works, bridges, water works, roads, airport and harbors. JS series mini Concrete Mixers are double horizontal axle forced mixers with two advantages of independent performance or forming simple concrete mixing plants with PLD series of batching machines.
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