什么是三次油气回收   简单来说，一次回收是将油罐车泄油时地下油罐排出的气体回收到车上罐拉回油库，就是气体油体转移；二次回收是将加油机加油时挥发的气体通过吸力泵吸回油罐，减少加油时产生的气体污染。但是，通过前两次工作并没有彻底减少加油站可以避免的气体污染，油罐没有做到全密闭工作，在压力达到一定值时，油罐还会通过气体压力阀排放气体导致环境污染，所以我们采用三次油气回收装置。三次油气回收就是油罐车在卸油时，将地下储油罐的气体（主要指汽油、稳定轻烃等易挥发油品的挥发物）均衡的置换到油气回收处理设备内，进行冷凝处理，将该部分气体热量置换出来，使其由气态变为液态，实现回收利用。处理完以后，合格尾气通过排气口排放，如此循环，称为三次油气回收。目前有哪些三次油气回收工艺

　　What is tertiary oil and gas recovery? Simply put, primary recovery is the process of recovering the gas discharged from the underground oil tank when a tanker truck leaks oil, which is then transported back to the oil depot from the tank on the truck. This is known as gas oil transfer; Secondary recycling is the process of using a suction pump to suck back the gas evaporated during refueling from a gas dispenser into the oil tank, reducing the gas pollution generated during refueling. However, the first two operations did not completely reduce the gas pollution that gas stations can avoid. The oil tank did not achieve fully enclosed operation, and when the pressure reached a certain value, the oil tank would still discharge gas through the gas pressure valve, causing environmental pollution. Therefore, we adopted a three-stage oil and gas recovery device. Triple oil and gas recovery refers to the process by which oil tankers evenly replace the gas from underground storage tanks (mainly volatile substances such as gasoline and stable light hydrocarbons) with the oil and gas recovery equipment during unloading. This process involves condensation to remove the heat from the gas and transform it from a gaseous state to a liquid state, achieving recycling and utilization. After processing, the qualified exhaust gas is discharged through the exhaust port, and this cycle is called tertiary oil and gas recovery. What are the current three oil and gas recovery processes

　　三次油气回收主要是针对下面两种种情况产生的油气进行回收处理：由于汽油非常容易挥发，当油罐系统温度升高时，汽油蒸发加剧，会引起呼吸阀排放油气；由于热胀冷缩现象，当油罐系统温度降低时，呼吸阀会吸入空气，当油罐系统温度再次升高时，也会引起呼吸阀排放油气。

　　The three rounds of oil and gas recovery are mainly aimed at the recovery and treatment of oil and gas generated in the following two situations: due to the high volatility of gasoline, when the temperature of the oil tank system rises, gasoline evaporation intensifies, which can cause the breathing valve to discharge oil and gas; Due to the phenomenon of thermal expansion and contraction, when the temperature of the oil tank system decreases, the breathing valve will suck in air, and when the temperature of the oil tank system rises again, it will also cause the breathing valve to discharge oil and gas.

　　目前国内外对加油站三次油气回收的治理主要有冷凝法、吸收法、吸附法、膜分离法几种方法，以及它们的组合工艺。

　　At present, there are several methods for the treatment of triple oil and gas recovery at gas stations both domestically and internationally, including condensation, absorption, adsorption, membrane separation, and their combined processes.

　　冷凝法：是利用油气在不同温度和压力下具有不同的饱和蒸气压，通过降低温度或增加压力，使油气首先凝结出来。

　　Condensation method: It utilizes the different saturated vapor pressures of oil and gas at different temperatures and pressures, and first condenses the oil and gas by reducing the temperature or increasing the pressure.

　　吸收法：是通过油气和吸收剂(轻柴油、低温汽油、有机溶剂)的逆流接触，利用油气中各组分在吸收剂中溶解度的不同而进行分离。

　　Absorption method: It involves the countercurrent contact between oil and gas and absorbents (light diesel oil, low-temperature gasoline, organic solvents) to separate the components in the oil and gas based on their different solubilities in the absorbents.

　　吸附法：是利用油气中各组分与吸附剂(活性炭、活性炭纤维、硅胶、分子筛等)间结合力不同，实现难吸附组分与易吸附组分的分离。因为所用吸附剂价廉易得，处理效果好，所以应用最为广泛。

　　Adsorption method: It utilizes the different binding forces between various components in oil and gas and adsorbents (activated carbon, activated carbon fibers, silica gel, molecular sieves, etc.) to achieve the separation of difficult to adsorb components and easy to adsorb components. Because the adsorbent used is inexpensive, easy to obtain, and has good treatment effects, it is the most widely used.

　　膜分离法：在压力驱动下，借助气体各组分在高分子膜表面的吸附能力以及在膜内渗透速率的差异进行分离。

　　Membrane separation method: Under pressure drive, separation is carried out by utilizing the adsorption capacity of gas components on the surface of polymer membranes and the difference in permeation rate inside the membrane.

　　四种油气回收工艺的比较：

　　Comparison of four oil and gas recovery processes:

　　吸附法：利用混合物中各组分与吸附剂之间结合力强弱的差别，使混合物中难吸附与易吸附组分实现分离。

　　Adsorption method: By utilizing the difference in binding strength between each component in the mixture and the adsorbent, the difficult to adsorb and easy to adsorb components in the mixture can be separated.

　　吸收法：通过混合气与适当的液体接触，气体中的一种或几种组分便溶解于该液体内形成溶液，不能溶解的组分则保留在气相中，于是原混合物气体的组分得以分离。

　　Absorption method: By contacting a mixture of gas with an appropriate liquid, one or more components in the gas dissolve in the liquid to form a solution, while insoluble components remain in the gas phase, thus separating the components of the original mixture gas.

　　冷凝法：利用各种烃类VOcs在不同温度和压力下具有不同的饱和蒸气压，通过降低温度或增加压力，使某些有机物首先凝结出来。

　　Condensation method: Utilizing various hydrocarbon VOCs with different saturated vapor pressures at different temperatures and pressures, certain organic compounds are first condensed by reducing temperature or increasing pressure.

　　膜分离法：利用烃类vocs与空气在膜内扩散性能(即渗透速率)的不同来分离。

　　Membrane separation method: Separation is achieved by utilizing the difference in diffusion performance (i.e. permeation rate) between hydrocarbon VOCs and air within the membrane.

　　膜分离工艺的介绍

　　Introduction to membrane separation process

　　科仕曼针对现有冷凝回收工艺和吸附工艺的优缺点，采用冷凝+膜+吸附梯度耦合工艺，强化冷凝，降低吸附阶段负荷，做达标排放处理。

　　Kesiman adopts a condensation+membrane+adsorption gradient coupling process to enhance condensation, reduce adsorption stage load, and achieve standard emission treatment based on the advantages and disadvantages of existing condensation recovery and adsorption processes.

　　适用范围及工作原理 1.本设备适用于汽油加油站，三次油气回收。油气回收装置主要应用于加油站、油库等处，运用冷凝、吸附等方式，将储油罐的油气转换为液态汽油，处理能力30m/h，油罐车卸油时45分钟即可完成任务，工作温度最低可达-80℃，制冷分三个阶段，预冷、浅冷、深冷，一般加油站-37℃即可达到回收效果，具有能耗低、噪音小，节能环保等优点。

　　Scope of application and working principle: 1. This equipment is suitable for gasoline filling stations and tertiary oil and gas recovery. The oil and gas recovery device is mainly used in gas stations, oil depots, and other places. It uses condensation, adsorption, and other methods to convert the oil and gas in the storage tank into liquid gasoline, with a processing capacity of 30m/h. The task can be completed in 45 minutes when the oil tanker unloads the oil. The minimum working temperature can reach -80 ℃, and the refrigeration is divided into three stages: pre cooling, shallow cooling, and deep cooling. Generally, gas stations can achieve the recovery effect at -37 ℃. It has the advantages of low energy consumption, low noise, energy conservation, and environmental protection.

　　2.工作原理本产品与外接加油机油气回收部分管部连接经过：进气管→温度传感器→过滤器→气液分离器→压缩机→风冷冷凝器→储气罐→过滤器→电磁阀→膨胀阀→冷凝器→储油箱（自备）   经过上述工作过程，将空气、油气分离。油气经冷凝后转化成液体。以便回收再利用，有效地解决了油气对大气的污染。

　　2. Working principle: This product is connected to the external refueling oil and gas recovery pipe through the following steps: intake pipe → temperature sensor → filter → gas-liquid separator → compressor → air-cooled condenser → air storage tank → filter → solenoid valve → expansion valve → condenser → oil storage tank (self provided). Through the above working process, air and oil are separated. Oil and gas are converted into liquid after condensation. In order to recycle and reuse, effectively solving the pollution of oil and gas to the atmosphere.

　　产品特点   主要是对挥发性气体的回收。减少对大气的污染，保护环境，避免有害气体对人体侵蚀。

　　The main feature of the product is the recovery of volatile gases. Reduce air pollution, protect the environment, and prevent harmful gases from eroding human health.

　　本文由  加油站三次油气回收设备  友情奉献.更多有关的知识请点击  http://www.kosman.com.cn/   真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from the gas station's three times oil and gas recovery equipment For more related knowledge, please click http://www.kosman.com.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.