Flue gas depth dedusting defogging water-saving unit and device composed thereby

Abstract

The invention provides a flue gas depth dedusting defogging water-saving unit and a device composed thereby. The unit comprises: a cooling impact chamber, a throat, a coagulation chamber and a filtration chamber, and flue gas passes through the cooling impact chamber, the throat, the coagulation chamber and the filtration chamber in order. The filtration chamber is a tubular structure, one end of the filtration chamber is communicated with a big end of the coagulation chamber, in the filtration chamber, particles formed by water vapor and dust rotate to the barrel wall of the filtration chamber under the action of a centrifugal force, and are then separated and recovered. After deep purification, the flue gas is discharged. The technical scheme involved in the invention lowers the operation difficulty, greatly reduces the replacement time and work intensity, and also saves cost.

Description

technical field [0001] The invention relates to the field of flue gas treatment, in particular to a flue gas deep dedusting, demisting, and water-saving unit and a device composed of the same, especially suitable for the field of wet flue gas desulfurization. Background technique [0002] At the end of the "Twelfth Five-Year Plan", with the implementation of the latest batch of national flue gas treatment standards, higher requirements are put forward for the environmental protection technology of flue gas treatment. In terms of air pollution control, in order to actively respond to the country's call and solve realistic and prominent environmental problems such as smog, industries such as electric power and metallurgy have put forward requirements for "ultra-low emissions" and "near-zero emissions". [0003] In order to meet the requirements of environmental protection, most of them are currently equipped with flue gas purification devices for flue gas purification, such as...

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Problems solved by technology

[0004] The flue gas of wet desulfurization often has the following problems: 1. The flue gas is saturated wet flue gas, which brings out a large amount of water vapor, resulting in a waste of water resources; 2. The fine particles cannot be removed, resulting in dust emissions that cannot meet the ultra-low emission requirements; 3. Flue gas contains SO 3 , when the dust exceeds the standard, especially the fine dust exceeds the standard, aerosols are formed, causing the smoke plume to delay too long, resulting in "landscape pollution"

However, the wet electrostatic precipitator has the following problems: 1. Huge volume, high investment cost, and difficult transformation; 2. The system is easy to block, requires a large amount of flushing water, and is difficult to operate and maintain

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