HF烷基化装置技术改造的若干思路

INOVATORY SUGGESTIONS FOR HF ALKYLATION UNIT

根据国内同类装置的实际生产情况,提出了HF烷基化装置技术改造的13条思路,包括:增设在线水分析仪、采用分子筛脱水、HF内部再生、HF无泵再生、改主分馏塔i-C_4液相抽出为气相抽出、堵主分馏塔塔盘、KOH与刚玉球隔层铺置、采用液态碱中和含酸丙烷或正丁烷中的HF、用KOH溶液代替NaOH溶液中和废气中的HF、含酸气体中和铝挡板改成筛板塔盘、用专用垫片、采用碳钢旋塞阀替代碳钢闸阀等。

Based on the actual operation practice of the same units in China, 13 suggestions of innovation for the HF alkylation unit are put forword,including: the addition of on-line water content analyzer, adoption of molecular sieve dewatering,internal HF regeneration, changing liquid phase draw off of i- C_4 from main fractionating tower to gas phase draw off, replacing aqueous NaOH with aqueous KOH for neutralization of HF in tail gas, using carbon steel plug valve in the place of carbon steel gate valve, etc.