Smoke pre-desulfuration system

Abstract

The invention discloses a smoke pre-desulfuration system, which comprises a pre-spraying device and a pre-circulating pump, wherein an inlet of the pre-circulating pump is communicated with a limestone slurry pond, and an outlet of the pre-circulating pump is communicated with the pre-spraying device; the pre-spraying device is arranged in a flue at an inlet of a desulfuration absorption tower; a pre-desulfuration system is arranged at the inlet of the desulfuration absorption tower additionally, and slurry in the limestone slurry pond is conveyed to the flue at the inlet of the desulfuration absorption tower to be sprayed, so that smoke is subjected to pre-desulfuration once before entering the desulfuration absorption tower; and thus, the desulfuration efficiency of the desulfuration device is improved and the problem of low desulfuration efficiency caused by actual coal varieties is solved. In addition, compared with the conventional reforming method of modifying the desulfuration absorption tower, arranging a spraying layer on the tower additionally and the like, the smoke pre-desulfuration system has small modification and low modification and installation cost.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to a flue gas pre-desulfurization system. Background technique [0002] my country is a country that uses coal as the main energy source. Coal-fired power generation is one of the most important ways to utilize coal in our country. According to our national conditions, coal-fired power generation will dominate in the 21st century. Among the many air pollutants emitted by coal-fired thermal power units, SO 2 And the dust is more harmful to the environment and is the main pollutant to be controlled. With the progress of society and the development of economy, the pollution of thermal power plants to the atmospheric environment has been widely concerned by people. Therefore, it is a severe challenge for the sustainable development of my country's energy field to effectively reduce pollutant emissions and improve the impact on the environment. [0003] At pre...

AI Technical Summary

Problems solved by technology

Due to the high sulfur content of coal in my country and the large gap between the sulfur content of different coal types, the sulfur content of the designed coal type is often smaller than the actual sulfur content of the coal type used, which leads to a large number of desulfurization absorption towers. The operating sulfur content is greater than the design sulfur content, and the desulfurization efficiency of the desulfurization system cannot meet the design requirements

The existing improvement method is generally to modify the tower body of the desulfurization absorption tower and add a spray layer on the tower. Although the desulfurization efficiency can be improved, the modification is relatively large, and the construction cost and equipment cost are relatively high.

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