什么是三次油氣回收   簡單來說，一次回收是將油罐車泄油時(shí)地下油罐排出的氣體回收到車上罐拉回油庫，就是氣體油體轉(zhuǎn)移；二次回收是將加油機(jī)加油時(shí)揮發(fā)的氣體通過吸力泵吸回油罐，減少加油時(shí)產(chǎn)生的氣體污染。但是，通過前兩次工作并沒有徹底減少加油站可以避免的氣體污染，油罐沒有做到全密閉工作，在壓力達(dá)到一定值時(shí)，油罐還會(huì)通過氣體壓力閥排放氣體導(dǎo)致環(huán)境污染，所以我們采用三次油氣回收裝置。三次油氣回收就是油罐車在卸油時(shí)，將地下儲(chǔ)油罐的氣體（主要指汽油、穩(wěn)定輕烴等易揮發(fā)油品的揮發(fā)物）均衡的置換到油氣回收處理設(shè)備內(nèi)，進(jìn)行冷凝處理，將該部分氣體熱量置換出來，使其由氣態(tài)變?yōu)橐簯B(tài)，實(shí)現(xiàn)回收利用。處理完以后，合格尾氣通過排氣口排放，如此循環(huán)，稱為三次油氣回收。目前有哪些三次油氣回收工藝

　　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

　　三次油氣回收主要是針對(duì)下面兩種種情況產(chǎn)生的油氣進(jìn)行回收處理：由于汽油非常容易揮發(fā)，當(dāng)油罐系統(tǒng)溫度升高時(shí)，汽油蒸發(fā)加劇，會(huì)引起呼吸閥排放油氣；由于熱脹冷縮現(xiàn)象，當(dāng)油罐系統(tǒng)溫度降低時(shí)，呼吸閥會(huì)吸入空氣，當(dāng)油罐系統(tǒng)溫度再次升高時(shí)，也會(huì)引起呼吸閥排放油氣。

　　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.

　　目前國內(nèi)外對(duì)加油站三次油氣回收的治理主要有冷凝法、吸收法、吸附法、膜分離法幾種方法，以及它們的組合工藝。

　　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：是利用油氣在不同溫度和壓力下具有不同的飽和蒸氣壓，通過降低溫度或增加壓力，使油氣首先凝結(jié)出來。

　　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：是通過油氣和吸收劑(輕柴油、低溫汽油、有機(jī)溶劑)的逆流接觸，利用油氣中各組分在吸收劑中溶解度的不同而進(jìn)行分離。

　　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：是利用油氣中各組分與吸附劑(活性炭、活性炭纖維、硅膠、分子篩等)間結(jié)合力不同，實(shí)現(xiàn)難吸附組分與易吸附組分的分離。因?yàn)樗梦絼﹥r(jià)廉易得，處理效果好，所以應(yīng)用最為廣泛。

　　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.

　　膜分離法：在壓力驅(qū)動(dòng)下，借助氣體各組分在高分子膜表面的吸附能力以及在膜內(nèi)滲透速率的差異進(jìn)行分離。

　　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.

　　四種油氣回收工藝的比較：

　　Comparison of four oil and gas recovery processes:

　　吸附法：利用混合物中各組分與吸附劑之間結(jié)合力強(qiáng)弱的差別，使混合物中難吸附與易吸附組分實(shí)現(xiàn)分離。

　　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：通過混合氣與適當(dāng)?shù)囊后w接觸，氣體中的一種或幾種組分便溶解于該液體內(nèi)形成溶液，不能溶解的組分則保留在氣相中，于是原混合物氣體的組分得以分離。

　　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：利用各種烴類VOcs在不同溫度和壓力下具有不同的飽和蒸氣壓，通過降低溫度或增加壓力，使某些有機(jī)物首先凝結(jié)出來。

　　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.

　　膜分離法：利用烴類vocs與空氣在膜內(nèi)擴(kuò)散性能(即滲透速率)的不同來分離。

　　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.

　　膜分離工藝的介紹

　　Introduction to membrane separation process

　　科仕曼針對(duì)現(xiàn)有冷凝回收工藝和吸附工藝的優(yōu)缺點(diǎn)，采用冷凝+膜+吸附梯度耦合工藝，強(qiáng)化冷凝，降低吸附階段負(fù)荷，做達(dá)標(biāo)排放處理。

　　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.

　　適用范圍及工作原理 1.本設(shè)備適用于汽油加油站，三次油氣回收。油氣回收裝置主要應(yīng)用于加油站、油庫等處，運(yùn)用冷凝、吸附等方式，將儲(chǔ)油罐的油氣轉(zhuǎn)換為液態(tài)汽油，處理能力30m/h，油罐車卸油時(shí)45分鐘即可完成任務(wù)，工作溫度最低可達(dá)-80℃，制冷分三個(gè)階段，預(yù)冷、淺冷、深冷，一般加油站-37℃即可達(dá)到回收效果，具有能耗低、噪音小，節(jié)能環(huán)保等優(yōu)點(diǎn)。

　　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.工作原理本產(chǎn)品與外接加油機(jī)油氣回收部分管部連接經(jīng)過：進(jìn)氣管→溫度傳感器→過濾器→氣液分離器→壓縮機(jī)→風(fēng)冷冷凝器→儲(chǔ)氣罐→過濾器→電磁閥→膨脹閥→冷凝器→儲(chǔ)油箱（自備）   經(jīng)過上述工作過程，將空氣、油氣分離。油氣經(jīng)冷凝后轉(zhuǎn)化成液體。以便回收再利用，有效地解決了油氣對(duì)大氣的污染。

　　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.

　　產(chǎn)品特點(diǎn)   主要是對(duì)揮發(fā)性氣體的回收。減少對(duì)大氣的污染，保護(hù)環(huán)境，避免有害氣體對(duì)人體侵蝕。

　　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.

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