再生有机胺法在冶炼烟气制酸尾气治理中的应用研究

发布时间：2019-04-19 10:37

【摘要】：本文以冶炼烟气制酸企业尾气提标改造工程为研究课题,对国内现有各类烟气脱硫工艺发展及应用情况进行了调研与分析,就再生有机胺法脱硫技术在冶炼烟气制酸尾气治理中的应用问题进行了探索与研究。研究结果证明:首先,通过工艺路线分析,确定增设末端脱硫装置才是解决冶炼烟气制酸企业尾气提标改造问题的彻底解决方案;通过现场考察调研及综合比选论证,确定再生有机胺法对冶炼烟气制酸尾气提标改造工程具有极佳的适用性。其次,结合课题研究内容与现场实际,对再生有机胺法脱硫工艺进行了优化设计,对预处理、吸收、解吸、净化四大工序的具体流程及控制参数进行设计,就解决课题项目问题设计了四种工况运行条件,并通过经济分析确定了最佳设计方案。系统建成后,对照设计文件就四种工况运行效果分别进行了测试,测试结果显示各项监测指标达到甚至优于原设计要求,经处理后废气中的SO2可实现14mg/Nm3的超净排放;并对系统运行条件进行了实验研究,确定了最佳运行条件为控制蒸汽量供给5-6.5 t/h,控制胺液硫酸根离子浓度1.1-1.3 eq/mol,pH4.8-5.2。最后,结合系统试运行情况,对照原设计文件从烟气条件、投资费用、主要物料消耗指标、运行成本及经济收益五个方面对再生有机胺脱硫装置运行情况进行了分析,主要指标达到或者优于设计值,实现了预期目的;并从工艺技术指标、经济效益、环境效益及适用性四个方面,与其他脱硫技术经济-技术指标进行了综合对比,再次印证了再生有机胺法脱硫技术经济效益及环境效益明显,对冶炼烟气制酸尾气提标改造工程具有最佳的适用性。
[Abstract]:In this paper, the development and application of all kinds of flue gas desulfurization processes in China are investigated and analyzed based on the project of raising standard of tail gas in acid-making enterprises from smelting flue gas. The application of regeneration organic amine desulfurization technology in the treatment of acid tail gas from smelting flue gas was explored and studied in this paper. The results show that: firstly, through the analysis of the process route, it is determined that adding the end desulphurization device is the thorough solution to solve the problem of raising the standard of tail gas in acid-making enterprises from smelting flue gas; Through on-the-spot investigation and comprehensive comparison and demonstration, it is confirmed that the regenerated organic amine method is very suitable for upgrading the standard of acid-making tail gas from smelting flue gas. Secondly, combined with the research content and field practice, the optimization design of regeneration organic amine desulfurization process was carried out, and the concrete flow and control parameters of four major processes, namely pretreatment, absorption, desorption and purification, were designed. Four operating conditions are designed to solve the problem of the project, and the optimum design scheme is determined by economic analysis. After the system was completed, the test results showed that the monitoring indexes reached or even better than the original design requirements, and the SO2 in the treated waste gas could realize the ultra-clean emission of 14mg/Nm3. The operating conditions of the system are studied experimentally. The optimum operating conditions are as follows: the steam supply is 5 ~ 6.5t / h, the concentration of sulfate ion is 1.1 ~ 1.3 eq/mol,pH4.8-5.2., and the concentration of ammonium sulfate ion is 1.1 ~ 1.3 mol 路mol ~ (- 1). Finally, according to the trial operation of the system, the operation of the regenerated organic amine desulfurization unit is analyzed from the five aspects of flue gas condition, investment cost, main material consumption index, operation cost and economic benefit according to the original design document. The main index achieves or is better than the designed value and achieves the desired purpose. From the aspects of process technical index, economic benefit, environmental benefit and applicability, the comprehensive comparison with other technical, economic and technical indexes of desulfurization has been carried out, and the obvious economic and environmental benefits of regenerated organic amine desulfurization technology have been confirmed again. It has the best applicability to the project of raising the standard of acid tail gas from smelting flue gas.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X78;X756

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