油气回收设施是油品装卸过程中使用较多，混合气形成排出后的一种回收利用，回收方法有 ：

　　Oil and gas recovery facilities are commonly used during the loading and unloading process of oil products, and are a type of recovery and utilization after the formation and discharge of mixed gas. The recovery methods include:

　　1.循环回路法。收油容器排出的油蒸气返回发油罐里，常见加油站套筒式双管加油枪，内外双管组成，汽油经内管流入汽车油箱，油箱内混合气体经内外管的环形通道返回加油站油罐内，全程实现环保加油。

　　1. Loop method. The oil vapor discharged from the oil receiving container is returned to the oil tank, which is commonly used in gas stations with sleeve type double tube refueling guns. The inner and outer tubes are composed of two pipes, and gasoline flows into the car's fuel tank through the inner pipe. The mixed gas in the fuel tank returns to the gas station's tank through the circular channel of the inner and outer pipes, achieving environmentally friendly refueling throughout the process.

　　2.吸附法。两台吸附床交替使用，一台吸附，一台解吸。目前常见的油气回收系统，主要原理就是吸附法，整套油气回收撬块，主要包括供油泵，回油泵，引风机，吸收塔和碳吸附塔，循环真空泵，及两个油罐，主要工作原理通过供油泵把贫油抽到吸收塔来充分吸附引风机抽过来的油蒸气，吸收后的油气然后在两台碳床交替吸附，吸附后气体分析合格后排入大气。如果分析不合格，此时再通过连锁阀门开关和真空泵再次返回到吸收塔里再吸附，如此循环，最终合格后排入大气。这种油气回收系统特点是，吸附效果好，操作简单，一键启动，全程全自动，大大减少高浓度油气的排出对大气的污染，同时吸收了大量油气，提高经济性，真正实现安全和环保。

　　2. Adsorption method. Two adsorption beds are used alternately, one for adsorption and the other for desorption. The main principle of the commonly used oil and gas recovery system is adsorption method. The entire oil and gas recovery block mainly includes a supply oil pump, a return oil pump, a induced draft fan, an absorption tower and a carbon adsorption tower, a circulating vacuum pump, and two oil tanks. The main working principle is to pump lean oil to the absorption tower through the supply oil pump to fully adsorb the oil vapor pumped by the induced draft fan. The absorbed oil and gas are then alternately adsorbed in two carbon beds. After gas analysis is qualified, the adsorbed gas is discharged into the atmosphere. If the analysis is not qualified, it will be returned to the absorption tower again through the interlock valve switch and vacuum pump for adsorption. This cycle will be repeated until it is finally qualified and discharged into the atmosphere. The characteristics of this oil and gas recovery system are good adsorption effect, simple operation, one click start, fully automatic throughout the process, greatly reducing the pollution of high concentration oil and gas emissions to the atmosphere, while absorbing a large amount of oil and gas, improving economy, and truly achieving safety and environmental protection.

　　3.冷凝法，冷凝吸收法，冷凝压缩法，主要原理是降低储油容器排出混合气的温度，使油气凝结成液体，收集凝结液，达到减少油品损耗的目的。

　　3. Condensation method, condensation absorption method, condensation compression method, the main principle is to reduce the temperature of the mixed gas discharged from the oil storage container, so that the oil and gas condense into liquid, collect the condensed liquid, and achieve the goal of reducing oil loss.

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