催化裂化烟气湿法净化装置运行问题及治理措施探讨

分析了湿法催化裂化烟气净化装置运行中存在的主要问题，并提出了综合治理措施。针对部分催化装置存在的蓝烟拖尾、SCR模块氨逃逸、浆液含有复杂酸和盐含量高、视觉白烟等问题，可采取的主要措施包括：使用硫转移剂源头回收SO_x，实现资源化利用，使用硫转移剂后烟气中SO_x脱除率50%~95%，蓝色烟羽消失；为减少SCR氨逃逸，宜采用精准喷氨自动控制技术、直插式测量表；综合塔浆液pH控制需考虑温度影响因素；粉尘回收需考虑源头回收，减少湿态回收。

OPERATION PROBLEMS AND TREATMENT MEASURES OF WET PURIFICATION UNIT FOR FCC FLUE GAS

The major problems of FCCU flue gas in wet purification process were analyzed and the countermeasures were proposed. The problems included blue smoke tail, ammonia escape of SCR, complex acids and high salt content in scrubbing solution, and visual white smoke from purified flue gas. The sulfur transfer agent to recover SO_x from source was recommended as the main measures. After using the sulfur transfer agent, the SO_x removal rate of the flue gas was 50% to 95%, the blue smoke tail disappeared and the ammonia escape of SCR was reduced by using automatic precise control technology of ammonia injection. Temperature should be considered for pH control of the scrubbing tower. It is necessary to consider the recovery of particulate matter from the source to reduce the wet recovery