Cooperative treatment method and device for ultra-clean emission of biomass boiler flue gas

Abstract

The invention relates to the technical field of flue gas treatment, in particular to a biomass boiler flue gas ultra-clean emission cooperative treatment method and equipment, and the method comprises the steps that a flue is transformed, and boiler flue gas is within a preset temperature range; spraying alkaline powder into the flue to carry out SDS (Sodium Dodecyl Sulfate) dry deacidification treatment; carrying out bag type dust removal treatment on the flue gas subjected to the deacidification treatment; carrying out medium-low temperature SCR (Selective Catalytic Reduction) denitration treatment on the flue gas subjected to bag type dust removal treatment; and the flue gas subjected to SCR denitration treatment is subjected to heat exchange treatment and waste heat recovery and then is discharged outwards. The flue gas is independently and cooperatively treated through SDS dry desulfurization, bag type dust removal, medium and low temperature SCR denitration and waste heat recovery, so that corresponding pollutants in the flue gas can be effectively removed, the heat recovery efficiency can be improved, the system resistance can be reduced, and energy conservation and consumption reduction can be realized.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a method and equipment for collaborative treatment of ultra-clean emission of biomass boiler flue gas. Background technique [0002] Due to the lack of mandatory biomass briquette fuel quality standards, supporting special combustion equipment standards, pollution control technical guidelines and special biomass boiler flue gas emission standards in China, there are uneven fuel quality, lack of special combustion equipment and existing The non-standard boiler transformation has led to problems such as complex pollutant emission components, high concentrations, and difficult environmental supervision from biomass boilers in most areas. At the same time, more and more production practices and environmental monitoring have shown that the concentration of acid gas, particulate matter, and NOx in the exhaust gas of many biomass boilers exceeds the standard. This status quo...

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