管式洗涤器在磷复肥尾气净化上的技改应用

Technical Revamp and Application of Tubular Scrubber for Purification of Phosphate Fertilizer Tailgas

随着国家环保标准的要求越来越严苛,化工行业的尾气排放要求也越高,改进尾气除尘洗涤系统已成为达到环保预期效果的重要措施。以现有磷酸铵、硫酸铵等磷复肥装置为例,在现有设备的基础上,将管式洗涤器应用于造粒、干燥、冷却等环节尾气洗涤系统。介绍了改造后洗涤系统的工艺流程,生产实践证明,该技术改造降低了排放尾气中的粉尘、NH 3浓度,有效抑制管道结垢,同时提高了氮、磷等资源回收利用率。

As the national environmental protection standard gets more and more stringent,the tailgas emission requirements for the chemical industrial also get higher and higher,and the improvement of tailgas dust removal scrubbing system has become an important measure to reach the expected environ⁃mental protection effect.By taking the example of existing phosphate compound fertilizer plants such as ammonium phosphate and ammonium sulfate,and based on the existing equipment,the tubular scrubber is applied in the tailgas scrubbing system in granulation,drying and cooling sections,The process flow of the scrubbing system after revamp are outlined.Production practice has shown that the technical revamp has reduced the dust and NH3 level in the tailgas emission,effectively prohibited fouling in the pipe,and increased the recycle of N and P resources.