摘要
油气作为高沸点VOCs,排放后会产生高浓度的有机挥发物,不仅污染环境、损害人体健康,还造成了大量的能源浪费。基于冷凝法的油气回收工艺,能够一步实现油气的资源化回用,因此该工艺的多级冷凝、深度冷凝技术,是近年来的重点研究方向。根据制冷原理的不同,冷凝法主要分为机械制冷和液氮制冷,本文对这2种冷凝工艺进行了对比分析,并以汽油的油气回收装置为例,对冷凝法工艺进行了研究分析。结果表明,采用机械制冷时,油气温度从30℃冷凝至-75℃时,能耗低于液氮制冷,但未能达到排放标准,需要增加末端处理设施。采用液氮制冷,可将油气温度一步深度冷凝至-120℃,油气的排放浓度达到排放标准。采用先机械制冷再液氮制冷的组合冷凝工艺,不仅回收效率高,能达标排放,而且相比液氮制冷,经济效益增加了10%以上。
As high boiling point VOCs,vapor emited high concentrations of organic volatiles,which not only polluted the environment and damage human health,but also caused a large amount of energy waste.The oil and gas recovery process based on condensation could directly achieve the reuse of oil and gas resources in one step.The multi-stage condensation and deep condensation technology of this process was a key development direction in recent years.The condensation method included mechanical refrigeration and liquid nitrogen refrigeration based on different refrigeration principles.This article compared and analyzed the two condensation processes,and took the design of a gasoline oil and gas recovery device as an example to conduct research and analysis on the condensation process.The research results indicated that using mechanical refrigeration,when the oil and gas temperature condensed from 30℃ to-75℃,the energy consumption was lower than that of liquid nitrogen refrigeration,but it failed to meet the emission standards,and additional end treatment facilities were needed.When liquid nitrogen refrigeration was used to deeply condense the oil and gas temperature to-120℃ in one step,the emission concentration of the oil and gas reached the emission standard.A combined condensation process of mechanical refrigeration followed by liquid nitrogen refrigeration not only achieved high recovery efficiency and met emission standards,moreover,the refrigeration efficiency was increased by more than 10%.
作者
陈松
周靖鑫
许可
朱志坤
黄建珍
CHEN Song;ZHOU Jingxin;XU Ke;ZHI Zhikun;HUANG Jianzhen(Zhejiang TITAN Design&Engineering Co.,Ltd.,Hangzhou 310030,China)
出处
《化工技术与开发》
CAS
2024年第6期74-77,共4页
Technology & Development of Chemical Industry
关键词
机械制冷
液氮制冷
冷凝法
油气回收
能耗分析
mechanical refrigeration
liquid nitrogen refrigeration
condensation method
oil-gas recovery
energy analysis
