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东原油干餾产品回收流程中,作为热载体的循环瓦斯,未经冷却,以80—83℃高温进入加热爐,加热到500℃返回干餾爐中。因此,循环瓦斯中所含一部分焦油没有冷却下来,在加热爐中裂化而损失,其次,由于加热爐中严重的裂化过程,产生大量焦炭,致使加热爐常被堵塞而影响生产。按目前东原油设备能力及结构来看,将循环瓦斯与剩余瓦斯全部经过冷却不可能,因受排送机能力所限,为了减少系统阻力,采取了三个措施: 一、系统中氨回收塔改为喷淋塔,由两个塔改用一个;
Recycling of crude oil in the East crude oil recovery process, as the heat carrier gas circulation, without cooling, to 80-83 ℃ high temperature into the furnace, heated to 500 ℃ return to the retort. As a result, some of the tar contained in the circulating gas is not cooled and is lost in cracking in the heating furnace. Second, due to the severe cracking process in the heating furnace, a large amount of coke is generated, which often causes the heating furnace to be clogged and affects the production. According to the current capacity and structure of the East crude oil equipment, it is impossible to circulate the gas and the remaining gas through cooling. Due to the limited capacity of the discharging machine, three measures are taken to reduce the system resistance. First, the ammonia recovery tower Change to a spray tower, switch from two towers to one;