Combined desulphurization and dedusting apparatus and method for wet flue gas

Abstract

The invention provides a combined desulphurization and dedusting apparatus and method for wet flue gas. The upper part of the apparatus executes tubular electrostatic dust collection, and the lower part of the apparatus executes alkaline desulphurization. The apparatus comprises a drum; one side of the bottom of drum is provided with a flue gas inlet channel; bottom space of the drum is a buffer pool; the upper part of the flue gas inlet channel is provided with two lower sprinkler pipes; an air flow uniform distribution plate is arranged above the lower sprinkler pipes; the upper part of the air flow uniform distribution plate is an electrostatic dust collection zone; the lower sprinkler pipes and an upper sprinkler pipe are respectively connected with outlets of booster pumps through pipelines; inlets of the booster pumps are connected with the bottom of a neutralizing pool; the top of the neutralizing pool is provided with an alkali lye adding pipeline and connected with an outlet pipeline of a booster pump b; an inlet pipeline of the booster pump b is connected with the central part of a sedimentation basin; the bottom of the sedimentation basin is connected with a waste liquid outlet through a pipeline; the top of the sedimentation basin is connected with the outlet of a booster pump a; and an inlet pipeline of the booster pump a is connected with the bottom of the buffer pool. The combined desulphurization and dedusting apparatus and method mainly overcome the problems of low efficiency, high energy consumption, low utilization rate of waste water and the like of desulphurization and dedusting of tail flue gas of an industrial boiler.

Description

Technical field: [0001] The invention relates to the field of air pollution control, in particular to a combined wet flue gas desulfurization and dust removal device and method. Background technique: [0002] In recent years, with the occurrence of smog, more and more people have paid attention to air quality and air pollutant emissions, especially boiler flue gas pollutant emissions; power plant boiler flue gas treatment started earlier, in In the country's strict implementation of standards, flue gas treatment and transformation have been carried out in a large area, but the flue gas pollution of industrial boilers is not optimistic. At present, the emission of flue gas pollutants from industrial boilers has exceeded that of power station boilers, becoming the first in the national industrial industry. Large pollution sources, in-depth treatment of industrial boiler flue gas pollution has become inevitable; [0003] The "Boiler Air Pollutant Emission Standard (GB13271-201...

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Problems solved by technology

[0006] The patent of the present invention provides a combined wet flue gas desulfurization and dust removal device and method, which mainly solves the problems of low efficiency of flue gas desulfurization and dust removal at the tail of industrial boilers, high energy consumption, and low utilization rate of waste water.

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