White smoke removing system and technology capable of accurately controlling corrosion

Abstract

The invention discloses a white smoke removing system and a technology capable of accurately controlling corrosion. The system comprises a gradient fin temperature control type heat exchanger, a cooling washer, a sewage treating device and a defogger, wherein the gradient fin temperature control type heat exchanger can continuously enhance heat transfer on the high-temperature untreated gas side in a cooling process through pipe bundle distribution and an external-pipe fin height step type design to control a wall surface temperature to be larger than an acid dew point. Therefore, an anticorrosion design can be achieved through lower material cost; meanwhile, spraying is utilized to enhance condensation and dehumidification, and thermal energy of untreated gas is recycled to heat clean flue gas; by means of the two measures, an absolution moisture content and a relative moisture content are both remarkably reduced, and the white smoke phenomenon can be completely removed without an extra heat source and under low water consumption.

Description

technical field [0001] The invention belongs to the field of energy saving and environmental protection, and relates to a white smoke removal system and process for precisely controlling corrosion, and is especially suitable for the treatment process of white smoke plume in a chimney of a desulfurization system. Background technique [0002] With the continuous development and progress of my country's economy, the demand for energy is increasing day by day. Among them, coal and oil are the most important combustion energy in my country. Although they meet the needs of economic development, they have caused major environmental pollution, especially sulfur dioxide pollution. Most of the gas purification and treatment technologies adopt the limestone-gypsum wet desulfurization process. The clean flue gas with saturated water at the outlet of the absorption tower is partially condensed to form liquid droplets during the discharge process from the chimney, and the moisture in the f...

AI Technical Summary

Problems solved by technology

[0006] In summary, in the prior art, most of the white smoke treatment processes have the defects of high energy consumption and serious corrosion

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