乙烯装置干燥器延长再生周期的技术

Technology of extending regeneration cycle of desiccator in ethylene plant

某石化公司乙烯装置及其配套装置投用后,干燥剂需频繁再生切换,过程中高压蒸汽用量较大,同时随再生次数增加,分子筛吸附能力下降。针对此情况开展干燥器再生周期延长技术攻关,通过理论计算、分阶段科学试验,将裂解气干燥器、第2干燥器以及氢气干燥器的再生切换周期较原设计延长25%、100%、50%,减少干燥剂再生次数,减缓干燥剂劣化程度,降低高压蒸汽用量,提高企业经济效益。

After putting into use of an ethylene plant and its supporting devices,the desiccant needed to be regenerated and switched frequently with amounts of high pressure steam consumption,while the adsorption capacity of molecular sieve decreased with the increase of regeneration times.In view of the above situation,we carried out the key technical research on extension of regeneration cycle of the desiccator.Through theoretical calculation and phased scientific experiments,the regeneration and switching cycle of the cracking gas desiccator,the second desiccator and the hydrogen desiccator was extended by 25%,100%and 50%compared with the original design,which reduced the regeneration times of the desiccant,slowed down the deterioration of the desiccant,and reduced the consumption of high pressure steam,improved the economic benefits of enterprise.