Process for removing smoke dust by wet ammonia flue gas desulphurization and device thereof

Abstract

The invention provides a process for removing smoke dust by wet ammonia flue gas desulphurization. The smoke dust removing process comprises two processes, namely, smoke dust removal and ammonium sulfate post-treatment, wherein the ammonium sulfate post-treatment process is that desulfurated ammonium sulfate slurry which is generated by a desulphurization system is delivered to a cyclone separator, a lower overflow vent of the cyclone separator is connected with the inlet of a centrifugal machine, and a solid outlet of the centrifugal machine is connected with a drier; and the smoke dust removing process is that liquid of an upper overflow vent of the cyclone separator and a liquid outlet of the centrifugal machine are connected with filtering separation equipment, and liquid enters a recirculating tank or a liquid tank for next circulation after dust in the liquid is removed by the filtering separation equipment. A device for removing dust by wet ammonia desulphurization comprises the cyclone separator, a centrifugal machine, the drier, the filtering separation equipment, an ash settling pond, a circulating tank or the liquid tank with a stirring device, is used for combining theammonium sulfate post-treatment and dust removal, and has simple process and system, small occupied area and low operation cost.

Description

technical field [0001] The invention belongs to the field of environmental protection and relates to a smoke and dust removal process, in particular to a smoke and dust removal process and a device thereof in a wet ammonia flue gas desulfurization process. Background technique [0002] With the development of industry and the concentration of population, the ambient air has been polluted more and more seriously. Among the gaseous pollutants that pollute the atmosphere, SO 2 It is the most important pollutant, with the largest quantity, the most extensive impact area, and the most difficult to control. According to the statistics of the State Environmental Protection Administration, since 1996, my country's annual SO 2 With emissions exceeding 15.5 million, China has become the world's largest emitter. my country's land area affected by acid rain has exceeded 30%, and the annual economic loss has exceeded 100 billion yuan. On the other hand, our country is a large agricul...

AI Technical Summary

Problems solved by technology

There are some problems in these two processes. The former has complex equipment structure, large floor area, large system resistance and hig

Images