火电厂烟气SCR脱硝尿素催化水解制氨技术研究

Research on the Urea Catalytic Hydrolysis Technology for Flue Gas SCR Denitrification of Thermal Power Plant

尿素水解制氨技术安全性较好,能耗水平较低,但系统响应速率较慢,难以适应SCR烟气脱硝要求。为此,研究出一种尿素催化水解制氨新技术。介绍该技术原理、工艺流程和控制策略,并且对几种尿素制氨技术进行了综合对比;以成功应用于大唐长春第二热电厂6号机组脱硝工程尿素催化水解系统为例,介绍该技术的应用效果。研究结果表明,所研究的尿素催化水解制氨技术是一种先进的低能耗尿素制氨新技术,具有很好的市场应用前景。

The urea catalytic hydrolysis technology is of relatively good safety and low energy consumption. But its low system response rate makes it difficult to satisfy the requirements of SCR flue gas denitrification. In this paper, the principle, technical flow and control strategy of a new developed urea catalytic hydrolysis technology are presented. Its technical advantages and economic efficiency are analyzed. Comprehensive comparison is preformed between urea hydrolysis and pyrolysis technologies. Its successful application in Datang Changchun Second Thermal Plant is used as an example to show the effectiveness of this new technology. The research results show that the urea catalytic hydrolysis is a new advanced technology with low energy consumption and has good market prospect.