加油站为了完成油气污染治理，符合国家环境部门要求，会安装油气回收设备，油气回收是采用吸附法、吸收法、冷凝法或膜分离法，将挥发的汽油油气收集起来，使之重新变为汽油回收利用的。常见的油气回收设备有油气分离接头、同轴短皮管、拉断阀、同轴长胶管、油气排放处理装置等。下面一起来了解一下加油站油气回收设备有哪些吧。

　　In order to complete the treatment of oil and gas pollution and meet the requirements of the national environmental department, gas stations will install oil and gas recovery equipment. Oil and gas recovery uses adsorption, absorption, condensation, or membrane separation methods to collect volatile gasoline and gas, and convert them back into gasoline for recycling and reuse. Common oil and gas recovery equipment includes oil and gas separation joints, coaxial short hoses, break valves, coaxial long hoses, and oil and gas discharge treatment devices. Let's learn about the oil and gas recovery equipment at gas stations together.

　　一、加油站油气回收是什么意思

　　1、 What does gas station oil and gas recovery mean

　　加油站油气回收是指在装卸汽油和给车辆加油的过程中，将挥发的汽油油气收集起来，通过吸收、吸附或冷凝等工艺中的一种或两种方法，或减少油气的污染，或使油气从气态转变为液态，重新变为汽油，达到回收利用的目的。

　　Gas station oil and gas recovery refers to the process of collecting volatile gasoline and gas during the loading and unloading of gasoline and refueling of vehicles. Through one or two methods such as absorption, adsorption, or condensation, the pollution of oil and gas can be reduced, or the oil and gas can be transformed from a gaseous state to a liquid state and then back into gasoline, achieving the purpose of recycling and utilization.

　　油气回收是节能环保型的新技术，运用油气回收技术回收油品在储运、装卸过程中排放的油气，可以防止油气挥发造成大气污染，消除安全隐患，通过提高对能源的利用率，减小经济损失，从而得到可观的效益回报。

　　Oil and gas recovery is a new energy-saving and environmentally friendly technology. By using oil and gas recovery technology to recover the oil and gas emitted during the storage, transportation, loading and unloading of oil products, it can prevent air pollution caused by oil and gas volatilization, eliminate safety hazards, improve energy utilization efficiency, reduce economic losses, and obtain considerable benefits and returns.

　　二、加油站油气回收设备有哪些

　　2、 What are the gas recovery equipment at gas stations

　　加油站的油气回收设备一般分为一次回收设备、二次回收设备和三次回收设备三种，分别是：

　　The oil and gas recovery equipment at gas stations is generally divided into three types: primary recovery equipment, secondary recovery equipment, and tertiary recovery equipment, which are:

　　1、一次回收设备：油回气快速接头及盖、带法兰阀门卸油阻端接头等。

　　1. One time recycling equipment: oil return gas quick connector and cover, flange valve oil discharge resistance end connector, etc.

　　2、二次回收设备：油气分离接头、同轴短皮管、拉断阀、同轴长胶管、油气回收油枪、气液比的控制阀等。

　　2. Secondary recycling equipment: oil and gas separation joint, coaxial short leather tube, break valve, coaxial long rubber tube, oil and gas recovery oil gun, gas-liquid ratio control valve, etc.

　　3、三次回收设备：主要是一些油气排放处理装置。

　　3. Triple recycling equipment: mainly includes oil and gas discharge treatment devices.

　　三、加油站油气回收有几种方法

　　3、 There are several methods for gas station oil and gas recovery

　　1、吸附法

　　1. Adsorption method

　　利用活性炭、硅胶或活性纤维等吸附剂对油气/空气混合气的吸附力的大小，实现油气和空气的分离。油气通过活性炭等吸附剂，油气组分吸附在吸附剂表面，然后再经过减压脱附或蒸汽脱附，富集的油气用真空泵抽吸到油罐或用其他方法液化；而活性炭等吸附剂对空气的吸附力非常小，未被吸附的尾气经排气管排放。

　　By utilizing adsorbents such as activated carbon, silica gel, or activated fibers to determine the adsorption force of oil gas/air mixtures, the separation of oil gas and air can be achieved. Oil and gas are adsorbed on the surface of adsorbents such as activated carbon, and then undergo depressurization or steam desorption. The enriched oil and gas are pumped into oil tanks by vacuum pumps or liquefied by other methods; The adsorption force of activated carbon and other adsorbents on air is very small, and the unadsorbed exhaust gas is discharged through the exhaust pipe.

　　2、吸收法

　　2. Absorption method

　　根据混合油气中各组分在吸收剂中的溶解度的大小，来进行油气和空气的分离。一般用柴油等贫油做吸收剂。一般采用油气与从吸收塔顶淋喷的吸收剂进行逆流接触，吸收剂对烃类组分进行选择性吸收，未被吸收的气体经阻火器排放，吸收剂进入真空解吸罐解吸，富集油气再用油品吸收。

　　Separate oil and air based on the solubility of each component in the absorbent in the mixed oil and gas mixture. Generally, lean fuels such as diesel are used as absorbents. Generally, oil and gas are in countercurrent contact with the absorbent sprayed from the top of the absorption tower. The absorbent selectively absorbs hydrocarbon components, and the unabsorbed gas is discharged through a flame arrester. The absorbent enters a vacuum desorption tank for desorption, and the enriched oil and gas are then absorbed by oil products.

　　3、冷凝法

　　3. Condensation method

　　利用烃类物质在不同温度下的蒸汽压差异，通过降温使油气中一些烃类蒸汽压达到过饱和状态，过饱和蒸汽冷凝成液态，回收油气，一般采用多级连续冷却方法降低油气的温度，使之凝聚为液体回收。

　　By utilizing the difference in vapor pressure of hydrocarbon substances at different temperatures, the vapor pressure of some hydrocarbons in oil and gas is brought to a supersaturated state through cooling. The supersaturated vapor condenses into a liquid state to recover oil and gas. Generally, multi-stage continuous cooling methods are used to reduce the temperature of oil and gas and condense it into liquid for recovery.

　　4、膜分离法

　　4. Membrane separation method

　　利用特殊高分子膜对烃类有优先透过性的特点，让油气和空气混合气在一定压力的推动下，使油气分子优先透过高分子膜，而空气组分则被截留排放，富集的油气传输回油罐或用其他方法液化。

　　By utilizing the preferential permeability of special polymer membranes for hydrocarbons, the mixture of oil, gas, and air is pushed under a certain pressure to allow oil and gas molecules to preferentially pass through the polymer membrane, while air components are intercepted and discharged. The enriched oil and gas are transported back to the oil tank or liquefied by other methods.

　　以上就是四种主要的加油站油气回收方法，还有一种方法是直接燃烧法，将储运过程中产生的含烃气体直接氧化燃烧，燃烧产生的二氧化炭、水和空气作为处理后的净化气体直接排放。不过该工艺流程仅作为一种控制油气排放的处理措施，其不能回收油品，也没有经济效益。

　　The above are the four main methods for oil and gas recovery at gas stations. Another method is direct combustion, which oxidizes and burns the hydrocarbon containing gases generated during storage and transportation. The carbon dioxide, water, and air produced by combustion are directly discharged as purified gases after treatment. However, this process is only used as a treatment measure to control oil and gas emissions, and it cannot recover oil products and has no economic benefits.

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