Three-in-one process system for boiler flue gas ammonia desulfurization, denitrification and dust removal (pm2.5 removal)

Abstract

The invention discloses a desulfuration, denitration and dust removal (PM2.5 removal) three-in-one technical system for boiler exhaust gas by adopting an ammonia method, and relates to the technical field of boiler exhaust gas treatment. The system comprises an absorption system, a circulation system, an automatic ammonia injection system, a smoke dust pressing and filtering deslagging system, an oxidization system, a by-product recycling system and a self-control system. According to the technical system, the problems that ammonia and aerosol escape badly after desulfuration is executed by an air tower spraying ammonia method desulfuration device, the desulfuration efficiency is difficult to adjust and the investment is increased by the necessary extra arrangement of a dust removal device because the smoke dust emission amount cannot meet the standard are solved, the construction land use area is saved, and the repeated construction dust removal facility cost is lowered, and the disposable investment and running cost is greatly lowered; energy-saving, environment-friendly, economic, stable and standard running can be really realized, and the environment treatment concept of treating waste by waste and turning waste into treasures is achieved.

Description

technical field [0001] The invention relates to the technical field of boiler flue gas treatment, in particular to a three-in-one process system for boiler flue gas ammonia desulfurization, denitration and dust removal (removal of PM2.5). Background technique [0002] At present, most of the boiler flue gas treatment in the domestic environmental protection industry uses empty tower spraying devices. The structural design of the tower has a small diameter, generally 3 to 8 meters in diameter, and the height is generally about 30 meters. The spray layer is set to 3 to 5 layers. The liquid-gas ratio is large. The liquid-gas ratio of ammonia desulfurization is generally 4-5:1, and the liquid-gas ratio of other desulfurization methods is generally 8-12:1. Therefore, the potential energy work done by the circulation system is large and the energy consumption is high. This results in high operating costs. Since the flue gas is a dispersed phase in the empty tower (the SO in the f...

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