碱渣制备脱硫剂装置研发与工艺试验

发布时间：2018-06-14 01:02

本文选题：固体碱渣 + 脱硫剂制备　；参考：《华北理工大学》2017年硕士论文

【摘要】：氨碱法制碱是我国北方碱厂生产工业纯碱的主要方法,制碱过程中产生的废渣量大且污染严重,而固体碱渣的再利用是行业中的技术难题。课题利用固体碱渣制备电厂燃煤锅炉烟气脱硫剂,具有重要的工程实践意义。以某化工股份有限公司氨碱法制碱过程中产生的固体碱渣为研究对象,采用理论分析、实验研究、数值模拟和现场工艺试验的方法,对固体碱渣制备脱硫剂设备及工艺进行了研发。首先,分析了固体碱渣的理化特性,研究了经压滤机压滤后的固体碱渣的均质解聚方法,对均质器进行了小试和中试;其次,采用Fluent对均质器四种内部结构在不同转速时的流场进行了模拟,分析了影响浆液分布均匀性的因素,确定了破碎、搅拌、均质等设备的设计参数;最后,以制备合格的燃煤锅炉烟气脱硫剂为目标,进行了现场工艺试验,根据每道工序后碱渣的特性及其变化,确定整套工艺的达质达量、降耗策略和方法。碱渣制备脱硫剂是碱厂固体废弃物综合利用的关键技术,通过对碱渣的理化特性分析及实验研究,找出固体碱渣调浆过程中存在的问题,提出了整套工艺及均质器结构设计的思路和策略,其研究结果为固体碱渣制备脱硫剂的应用提供了依据。
[Abstract]:Ammonia alkali production is the main method of producing industrial soda in the north of China. The amount of waste residue produced in the process of alkali production is large and the pollution is serious. The reuse of solid alkali slag is a technical problem in the industry. It is of great engineering significance to prepare flue gas desulfurizer from power plant coal-fired boiler by using solid alkali slag. Taking the solid alkali residue produced in the process of alkali production by ammonia alkali process of a chemical company as the research object, the methods of theoretical analysis, experimental study, numerical simulation and field process test were adopted. The equipment and process for preparing desulfurizer from solid alkali residue were developed. Firstly, the physical and chemical properties of the solid alkali slag were analyzed, and the homogenization and depolymerization method of the solid alkali residue after pressure filtration by filter press were studied, and the homogenizer was tested and pilot-scale test was carried out. The flow field of four internal structures of the homogenizer at different speeds is simulated by fluent. The factors influencing the uniformity of slurry distribution are analyzed, and the design parameters of the equipment such as crushing, stirring and homogenizing are determined. Aiming at the preparation of qualified flue gas desulfurizer for coal-fired boiler, the field technological test was carried out. According to the characteristics and changes of alkali slag after each process, the quantity of quality, the strategy and method of reducing consumption of the whole process were determined. The preparation of desulphurizer from alkali slag is the key technology for comprehensive utilization of solid waste from alkali plant. Through the analysis of physical and chemical properties and experimental study of alkali slag, the problems existing in the process of solid alkali slag sizing are found out. The whole process and the structure design of the homogenizer are put forward. The research results provide the basis for the application of solid alkali slag in the preparation of desulphurizer.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X781.2

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