2200m3高炉湿法除尘系统设计.docVIP

包头地区原料条件下2200m3高炉湿法除尘系统设计 专业：冶金工程 指导教师：罗果萍 教授 班级：冶金06-1 姓 名：寇建兵 摘 要 本文主要说明高炉湿法除尘的特点以及结构，高炉煤气除尘后变为净煤气，为了提高净煤气的发热值方便输送及保证用户燃烧安全，要求净煤气含尘量一般应小于10mg/m3，温度应低于3 5 oC，机械水含量小于30g/m3，压力大于8000Pa。高压炉顶的净煤气还应考虑利用煤气余压发电，回收能源问题。高炉煤气的除尘，一般都是利用高炉煤气流出高炉时所具有的压力作为动能，克服煤气除尘系统的阻力损失来完成的。 目前，高炉煤气除尘工艺主要有湿法和干法两中。本设计为湿法除尘系统设备，包括重力除尘器、洗涤塔、文氏管、脱水器、电除尘器、高压阀组等，有煤气余压发电的还包括透平机。高炉煤气除尘工艺，由于炉顶压力和对煤气含量的要求不同，其流程也不完全一样。 关键词: 湿法除尘；洗涤塔；重力除尘器；文氏管；TRT发电 The dasing of for 2200M3 bIast furnace under raw Materials baotou qrea Abstract This paper shows the wet dedusting blast furnace gas and the structure characteristics, after dust into the net, in order to improve the gas calorific value of clean coal conveying and ensure users easy clean gas combustion safety requirements, HanChenLiang general 10mg/m3, should be less than 3 5 oC temperature should be less than 30g, mechanical water content, pressure is greater than 8000Pa/m3. The net top high-pressure gas still should consider using gas generating more pressure, recycling energy problems. The blast furnace gas and dust, are generally use blast furnace gas flow of gas pressure as kinetic energy, overcome the resistance losses dedusting system. At present, blast furnace gas mainly have the wet dedusting processes and dry in two. The design for the wet dedusting system equipment, including gravity precipitator, washing tower, venturi tube, dehydrator, electrical precipitator, high-pressure valves are more than gas group, including turbine generating press machine. Blast furnace gas and dust removal process, due to the top of the gas pressure and the content of different requirements, the process is not exactly the same. Keywords: The wet dust, Washing tower, Gravity precipitator, Venturi tube, TRT more electricity. 第一章 文献综述 图1.1重力除尘气结构式 煤气在除尘器中的流速一般在0.6~1m/s；重力除尘效率为75%~85%。 1.1.3洗涤塔 洗涤塔，按结构分为空心塔和木格填料塔；按压力分为高压塔和常压塔。目前大多高炉都采用高压空心塔，煤气入口管道从洗涤塔下部插入，煤气由下向上流动与喷水嘴喷出细水滴相接触，使煤气中灰尘增湿凝聚并分离出来。洗涤塔的作用是用水做洗涤剂在捕集灰尘同时将煤气冷却。