System and method for extracting water from purified flue gas after wet desulphurization

Abstract

The invention discloses a water lifting system and method for purified flue gas after wet desulphurization, a water-cooled cyclone cooler comprises a cooler outer cylinder and a cooler inner cylinder, the lower end of the cooler outer cylinder is connected with a water collecting tank, the upper end and the lower end of the cooler inner cylinder are communicated, and the lower end of the cooler inner cylinder extends into the cooler outer cylinder; a cooling water pipe is spirally wound on the outer wall of the extending part; the upper end of the cooler inner cylinder extends out of the cooler outer cylinder and is connected with a chimney; the outer wall of the cooler inner cylinder and the inner wall of the cooler outer cylinder form a cavity for flue gas circulation; a first flue gas inlet used for being connected with a flue gas outlet of a desulfurizing tower is formed in the cooler outer barrel, one end of the cooling water pipe is connected with a water outlet of the mechanical draft cooling tower, and the other end of the cooling water pipe is connected with a water inlet of the mechanical draft cooling tower; and the controller is used for controlling the mechanical draft cooling tower to supply cold water to the cooling water pipe. According to the invention, water vapor in clean flue gas after wet desulphurization can be efficiently collected and utilized.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment of thermal power generation, and in particular relates to a system and method for water extraction from clean flue gas after wet desulfurization. Background technique [0002] Even if the ambitious goal of "carbon neutrality" is to be achieved, a batch of large-capacity thermal power units must still be reserved to meet peak shaving and winter heating projects for people's livelihood, and thermal power is still the main source of electricity at present. Saving water and reducing water consumption indicators are the inevitable choice and development trend for the development of the power industry, especially in the coal-rich and water-deficient areas in the north. Taking Xi'an as an example, the per capita water resources occupancy is less than 260 cubic meters, which is 1 / 4 of the per capita water resources occupancy of Shaanxi Province and 1 / 7 of the national per capita water resources...

AI Technical Summary

Problems solved by technology

However, there is currently no relevant technology for collecting and utilizing the water vapor in the net flue gas from the desulfurization tower

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