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油气回收的关键技术在于如何使空气和油气进行分离,其常见的方法有冷凝法、吸附法、吸收法和膜分离法等。通过对比分析,中国石化北京燕山分公司采用“膜法+吸收法”技术回收1-己烯装车尾气,具体流程为利用吸收塔先进行第一步吸收,然后再利用膜做进一步的分离回收,这样可使尾气排放浓度达到国家排放标准,1-己烯回收效率达到95%以上。理论上,该油气回收装置一年回收的1-己烯约为19.68t,产生经济效益37.4万元,而能耗费用约11.5万元。根据实际运行状况,解决了温升、机械杂质等影响装置正常运行的问题。针对国内日益严重的环境问题,油气回收装置的达标标准将进一步严格,为解决这一问题,首先要根据物料的性质和实际情况选择合理的油气回收工艺,其次可以采用两种或两种以上的工艺方法联合使用,以达到最佳的回收效果。
The key technology of oil and gas recovery is how to separate air and oil and gas. The common methods are condensation, adsorption, absorption and membrane separation. Through comparative analysis, Sinopec Beijing Yanshan Branch adopts “membrane + absorption method” technology to recover 1-hexene exhaust gas, the specific process is to use the absorption tower first step to absorb, and then use the membrane to do further Separation and recovery, so that the concentration of exhaust emissions meet the national emission standards, 1-hexene recovery efficiency of 95% or more. In theory, the 1-hexene recovered from this oil and gas recovery unit in one year is about 19.68t, generating an economic benefit of 374,000 Yuan and an energy consumption of about 115,000 Yuan. According to the actual operating conditions, to solve the temperature rise, mechanical impurities and other issues affecting the normal operation of the device. In view of the increasingly serious environmental problems in China, the standards for the recovery of oil and gas recovery units will be further stricter. To solve this problem, we must first select a reasonable oil and gas recovery process according to the nature of the material and the actual conditions, and secondly, use two or more Process methods used in conjunction to achieve the best recovery results.