加油站油氣回收系統(tǒng)主要由一次油氣回收系統(tǒng)、二次油氣回收系統(tǒng)和三次油氣回收系統(tǒng)組成。

　　The gas station oil and gas recovery system mainly consists of a primary oil and gas recovery system, a secondary oil and gas recovery system, and a tertiary oil and gas recovery system.

　　一、一次油氣回收系統(tǒng)

　　1、 Primary oil and gas recovery system

　　一次油氣回收系統(tǒng)也稱卸油油氣回收系統(tǒng)，其基本原理是將汽車槽車卸汽油時產(chǎn)生的油氣，通過密閉方式收集進入汽車槽車內(nèi)，即通過汽車槽車與地下油罐之間的油氣回收連同管道，將地下油罐中的油氣回收到汽車槽車內(nèi)，汽車槽車將油氣帶回工廠處理，從而完成汽油油氣循環(huán)的平衡卸油過程。

　　The primary oil and gas recovery system, also known as the unloading oil and gas recovery system, is based on the principle of collecting the oil and gas generated during the unloading of gasoline from a tanker truck in a closed manner into the tanker truck. That is, the oil and gas in the underground oil tank are recovered into the tanker truck through the oil and gas recovery pipeline between the tanker truck and the underground oil tank, and the tanker truck takes the oil and gas back to the factory for processing, thus completing the balanced unloading process of gasoline oil and gas circulation.

　　汽車槽車卸油時將卸油軟管與汽車槽車出油口及汽油油罐的卸油快速接頭，油氣回收軟管連接汽車槽車油氣回收口及汽油儲罐油氣回收快速接頭。汽油槽車內(nèi)汽油流入汽油儲罐時，油氣通過汽油儲罐上的油氣回收管道流入汽油槽車內(nèi)，即用汽油將汽油儲罐內(nèi)相同體積的汽油油氣置換到汽油槽車內(nèi)。

　　When unloading oil from a tanker truck, connect the unloading hose to the tanker truck's oil outlet and the quick connector for unloading the gasoline tank. Connect the oil and gas recovery hose to the tanker truck's oil and gas recovery port and the quick connector for oil and gas recovery in the gasoline storage tank. When gasoline flows into the gasoline storage tank in the gasoline tanker, the oil and gas flow into the tanker through the oil and gas recovery pipeline on the gasoline storage tank, that is, gasoline is used to replace the same volume of gasoline in the gasoline storage tank into the gasoline tanker.

　　二、二次油氣回收系統(tǒng)

　　2、 Secondary oil and gas recovery system

　　二次油氣回收系統(tǒng)也稱加油油氣回收系統(tǒng)，分為集中式二次油氣回收系統(tǒng)和分散式二次油氣回收系統(tǒng)兩種類型，是將給汽車油箱加汽油時產(chǎn)生的油氣，通過密閉方式收集進入汽油儲罐的系統(tǒng)，即給汽車加油時將汽車油箱里排出的油氣回收到汽油儲罐。加油油氣回收通常采用真空輔助式油氣回收系統(tǒng)，即利用真空發(fā)生裝置輔助回收加油過程中產(chǎn)生的油氣。加油機具備回收油氣功能，其氣液比宜設定為1.0～1.2。氣液比是加油時收集的油氣體積與同時加入油箱內(nèi)的汽油體積的比值。

　　The secondary oil and gas recovery system, also known as the refueling oil and gas recovery system, is divided into two types: centralized secondary oil and gas recovery system and decentralized secondary oil and gas recovery system. It is a system that collects the oil and gas generated when adding gasoline to the car's fuel tank in a closed manner and enters the gasoline storage tank. That is, when refueling the car, the oil and gas discharged from the car's fuel tank are recovered into the gasoline storage tank. Refueling oil and gas recovery usually adopts a vacuum assisted oil and gas recovery system, which uses a vacuum generating device to assist in the recovery of oil and gas generated during the refueling process. The fuel dispenser has the function of recovering oil and gas, and its gas-liquid ratio should be set at 1.0-1.2. The gas-liquid ratio is the ratio of the volume of oil and gas collected during refueling to the volume of gasoline added to the tank at the same time.

　　集中式油氣回收系統(tǒng)與分散式油氣回收系統(tǒng)的主要區(qū)別在于真空泵的安裝位置。集中式油氣回收系統(tǒng)真空泵安裝在汽油儲罐附近、二次汽油油氣回收管道的后段，而分散式油氣回收系統(tǒng)真空泵安裝在每臺加油機內(nèi)部。

　　The main difference between centralized oil and gas recovery systems and decentralized oil and gas recovery systems lies in the installation position of the vacuum pump. The centralized oil and gas recovery system vacuum pump is installed near the gasoline storage tank and in the rear section of the secondary gasoline oil and gas recovery pipeline, while the decentralized oil and gas recovery system vacuum pump is installed inside each fuel dispenser.

　　三、三次油氣回收系統(tǒng)

　　3、 Triple oil and gas recovery system

　　三次油氣回收系統(tǒng)指在油品儲存過程中，對汽油儲罐內(nèi)呼出的油氣進行處理，使之變成汽油或高濃度的油氣，同時把分離出來的清潔空氣排入大氣。三次油氣回收系統(tǒng)需安裝在已經(jīng)完成二次油氣回收系統(tǒng)改造的加油站，通過采用吸附、吸收、冷凝、膜分離等方法對這部分油氣進行回收。

　　The three-stage oil and gas recovery system refers to the treatment of the oil and gas exhaled from the gasoline storage tank during the oil storage process, turning it into gasoline or high concentration oil and gas, while discharging the separated clean air into the atmosphere. The tertiary oil and gas recovery system needs to be installed at gas stations that have completed the secondary oil and gas recovery system renovation, and this part of the oil and gas can be recovered through methods such as adsorption, absorption, condensation, and membrane separation.

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