炼钢 ›› 2015, Vol. 31 ›› Issue (1): 73-77.

• 设计改造 • 上一篇    

电炉烟气全余热回收装置

董茂林,周涛   

  1. 重庆赛迪冶炼装备系统集成工程技术研究中心有限公司
  • 收稿日期:2014-06-16 修回日期:2014-08-20 接受日期:1900-01-01 出版日期:2015-02-05 发布日期:2015-02-13
  • 通讯作者: 董茂林 E-mail:81570172@qq.com
  • 基金资助:
    重庆市科技攻关计划项目

Total Waste Heat Recovery Device for Off-gas from Electric Arc Furnace

  1. CISDI R & D CO.,LTD
  • Received:2014-06-16 Revised:2014-08-20 Accepted:1900-01-01 Online:2015-02-05 Published:2015-02-13

摘要: 电炉冶炼的过程中,要产生大量的高温含尘烟气。虽然目前电炉烟气有多种冷却方式,但这些方式存在部分余热没有回收,除尘负荷大,蒸汽压力低、利用困难等问题。基于此现状,中冶赛迪开发了电炉烟气全余热回收装置,该装置能够回收电炉第四孔出口烟气约2100℃~250℃全部余热,且具有合适的过剩空气系数、沉降效率高、蒸汽压力高、锅炉寿命长等优势。该装置在110t电炉上进行了工程示范和测试验证,测试结果显示列管余热锅炉出口烟温低于250℃,沉降室沉降效率大于94%,达到了预期指标。同时对装置存在的问题进行了分析。

关键词: 电炉, 烟气, 余热, 沉降效率, 过剩空气系数

Abstract: A great amount of high temperature off-gas with dust is generated during the smelting process of electric arc furnace (EAF). There are many problems such as part of the waste heat is not recovered, high de-dusting load, low steam pressure and difficult utilization in the off-gas cooling ways, which are widely used now. According to this situation, Total Waste Heat Recovery Device for off-gas from Electric Arc Furnace is developed. This device can recover 2100℃~250℃ total waste heat of off-gas from the EAF fourth hole and has the advantages of proper excess air factor, high sedimentation efficiency, high pressure steam, long life span boiler and so on. A demonstration project was built on a 110t EAF and tests were carried out, the test results show that the temperature of the off-gas at the outlet of the tube waste heat boiler is 250℃ below, sedimentation efficiency of the sedimentation chamber is more than 94%. These results reach the expected index of the device. Meanwhile the problems of the Total Waste Heat Recovery Device are analyzed.

Key words: electric arc furnace, off-gas, waste heat, sedimentation efficiency, excess air factor