尾气循环银法高浓度甲醛工艺的模拟研究  

Simulation of off-gas recycling silver catalyst process for high concentration formaldehyde production

作　　者：崔国星[1] 肖瑞芬[2] 吴声旺 林明穗[1] 

机构地区：[1]三明学院化学与生物工程系,福建三明365004 [2]福建师范大学闽南科技学院,福建泉州362332 [3]三明化工有限公司

出　　处：《天然气化工—C1化学与化工》2011年第3期37-41,共5页Natural Gas Chemical Industry

基　　金：福建省科技计划重大项目(2010H6020)福建省科技计划项目(2010H2006)

摘　　要：对甲醛生产工艺进行了评述,提出了经膜分离或变压吸附技术分离氢后的尾气循环银法高浓度甲醛工艺。选用绝热带急冷氧化塔,银催化剂,建立尾气循环高浓度甲醛工艺系统模型。采用序贯模块法对尾气循环银法高浓度甲醛的生产工艺进行了稳态流程模拟研究,得到该流程的基本工艺数据。结果表明,尾气循环银法水醇摩尔比为0.1615,比传统银法的1.640低得多。适宜的尾气放空比为0.4143～0.4300,反应温度为893K～903K。Different high concentration formaldehyde production processes were evaluated,and a silver catalyst process with recycling of off-gas after separation of hydrogen from it by membrane or PSA technology was proposed.Using adiabatic reactor with silver catalyst and fast cooler,an off-gas recycling process model for high concentration formaldehyde production was established,and its steady state simulation calculation was executed by sequential modular approach.The basic process parameters were obtained.The results showed that molar ratio of steam to methanol decreased from 1.64 of normal process to 0.1615 of off-gas recycling process.Optimized discharge ratio of off-gas and reaction temperature were from 0.4143 to 0.4300 and 893K to 903K,respectively.

关 键 词：甲醛 高浓度 生产工艺 尾气循环 银法 模拟 

分 类 号：TQ224.12[化学工程—有机化工]