在加油站、油库、炼化厂装车台，汽油和轻质油品在装卸、储存过程中会挥发大量油气。这些油气不仅是安全隐患，直接排放还违反环保要求，同时白白损失了可回收的油品。油气回收设备要解决的，就是这三件事：安全、达标、回收价值。但真正做好并不容易，今天把技术要点讲透。

At gas stations, oil depots, and refinery loading stations, gasoline and light oil products will evaporate a large amount of oil and gas during loading, unloading, and storage. These oil and gas are not only safety hazards, but direct discharge also violates environmental requirements, and at the same time, they result in the loss of recyclable oil products. The oil and gas recovery equipment needs to solve these three things: safety, compliance, and recovery value. But it's not easy to truly excel, so today I'll explain the technical points in detail.

一、油气回收到底在回收什么

1、 What exactly is oil and gas recovery recovering

汽油挥发的气体不是单一成分，而是包含C2到C8以上的混合烃类。其中C5以上的重组分相对容易液化回收，而C2、C3、C4这些轻烃组分沸点极低，常规冷凝温度根本液化不了。传统冷凝加吸附工艺的常见问题就在这里：油液回收了一部分，但吸附床脱附出来的轻烃气体浓度波动大，排放检测时好时坏。要稳定达标，必须把这些轻组分也处理掉。

The gas evaporated from gasoline is not a single component, but a mixture of hydrocarbons ranging from C2 to C8 or higher. The heavy components above C5 are relatively easy to liquefy and recover, while the light hydrocarbon components such as C2, C3, and C4 have extremely low boiling points and cannot be liquefied at conventional condensation temperatures. The common problem with traditional condensation and adsorption processes is that a portion of the oil is recovered, but the concentration of light hydrocarbon gases desorbed from the adsorption bed fluctuates greatly, leading to fluctuating emission detection. To achieve stable compliance, these light components must also be disposed of.

二、超低温冷凝为什么是关键一环

2、 Why ultra-low temperature condensation is a crucial step

解决轻烃回收，核心思路是降低温度。业内成熟的方案采用-40℃到-180℃的超低温冷凝工艺，让C2以上的挥发性有机物都能液化分离。温度越低，可冷凝的组分越全，排放浓度越稳定。但超低温不是简单加个制冷机就行：换热器要防结霜堵塞，管道材质要耐低温脆化，制冷系统要长期稳定运行。这套技术门槛高，也是区分专业厂家和普通组装厂的分水岭。

The core idea for solving light hydrocarbon recovery is to lower the temperature. The mature solution in the industry adopts an ultra-low temperature condensation process from -40 ℃ to -180 ℃, which enables the liquefaction and separation of volatile organic compounds above C2. The lower the temperature, the more complete the condensable components and the more stable the emission concentration. But ultra-low temperature is not just about adding a refrigeration unit: the heat exchanger should prevent frost and blockage, the pipeline material should be resistant to low-temperature embrittlement, and the refrigeration system should operate stably for a long time. This set of technology has a high threshold and is also a watershed that distinguishes professional manufacturers from ordinary assembly plants.

三、单一工艺不够，组合方案才靠谱

3、 A single process is not enough, only a combination plan is reliable

油气回收没有万能工艺。冷凝适合回收高浓度油气，吸附适合处理低浓度尾气，吸收适合特定组分，CO和RTO适合末端达标处理。专业方案会根据油品类型、油气浓度、风量、排放标准来组合工艺。比如装车台油气浓度高，可以冷凝加吸收；储罐呼吸气浓度低但风量大，可能吸附加CO更经济。方案设计能力比设备本身更关键，选错路线后期怎么调都难达标。

There is no universal process for oil and gas recovery. Condensation is suitable for recovering high concentration oil and gas, adsorption is suitable for treating low concentration exhaust gas, absorption is suitable for specific components, and CO and RTO are suitable for end of pipe standard treatment. The professional plan will combine processes based on the type of oil, oil and gas concentration, air volume, and emission standards. For example, if the oil and gas concentration on the loading platform is high, it can be condensed and absorbed; The concentration of breathing gas in the storage tank is low but the air volume is large, which may be more economical to absorb additional CO. The ability to design solutions is more critical than the equipment itself, and it is difficult to meet the standards no matter how the wrong route is selected and adjusted later.

四、防爆和安全是底线

4、 Explosion proof and safety are the bottom line

油气属于易燃易爆气体，设备必须取得整机防爆合格证，每个电气组件都要有独立的防爆认证。设备内部要设置可燃气体检测报警，超限自动停机。控制系统方面，主流配置是西门子或ABB的PLC加触摸屏，支持一键全自动运行和远程通讯，方便接入厂区中控系统。这些不是选配，而是验收和长期安全运行的硬性要求。

Oil and gas are flammable and explosive gases, and equipment must obtain a complete explosion-proof certificate. Each electrical component must have an independent explosion-proof certification. The equipment should be equipped with combustible gas detection alarm and automatic shutdown when exceeding the limit. In terms of control system, the mainstream configuration is Siemens or ABB PLC with touch screen, supporting one click fully automatic operation and remote communication, making it easy to access the central control system in the factory area. These are not optional, but mandatory requirements for acceptance and long-term safe operation.

五、怎么判断厂家靠不靠谱

5、 How to determine whether a manufacturer is reliable or not

第一，看有没有针对轻烃组分回收的技术方案，这是行业公认的难点。第二，看有没有实际运行的达标案例，最好能实地考察。第三，看研发投入和技术积累，愿意花几年时间攻克具体技术难题的企业，和单纯采购配件拼装的贸易商，交付的系统稳定性完全不是一个量级。第四，看防爆资质和控制系统配置，这些直接关系验收能否通过。

Firstly, check if there are any technical solutions for the recovery of light hydrocarbon components, which is a recognized difficulty in the industry. Secondly, to see if there are any actual operational cases that meet the standards, it is best to conduct on-site inspections. Thirdly, in terms of R&D investment and technological accumulation, companies willing to spend several years tackling specific technical challenges and traders who simply purchase and assemble components have completely different levels of system stability in delivery. Fourth, check the explosion-proof qualification and control system configuration, which are directly related to whether the acceptance can be passed.

油气回收设备的价值，不只是把油收回来卖钱，更在于让排放长期稳定达标，消除安全隐患。选型时把油气成分分析做扎实，把工艺路线的适用边界搞清楚，再考察厂家的研发实力和防爆资质，基本就能避开大部分坑。

The value of oil and gas recovery equipment is not only to recover oil for sale, but also to ensure long-term stable emission standards and eliminate safety hazards. When selecting, a solid analysis of oil and gas composition, a clear understanding of the applicable boundaries of the process route, and an examination of the manufacturer's research and development capabilities and explosion-proof qualifications can basically avoid most pitfalls.