Coal-fired flue gas surplus energy recovery spray tower with load adaptability

Abstract

The invention belongs to the technical field of flue gas heat recovery and purification, and particularly relates to a coal-fired flue gas surplus energy recovery spray tower with load adaptability. The coal-fired flue gas surplus energy recovery spray tower comprises a tower body, wherein a gas outlet is formed in the top of the tower body; a gas inlet is formed in the bottom of the tower body; a demister is arranged below the gas outlet in the tower body; a spray layer is arranged below the demister and comprises a liquid distribution device; a spray area is arranged below the liquid distribution device; a water pan is arranged below the spray area; a plurality of partition plates are arranged in the spray area, parallel to the flow direction of the flue gas; the partition plates divide the spray area into a plurality of independent spray areas; a turnable flue gas baffle is arranged below each independent spray area. According to the spray tower, the opening / closing of independent spray areas in the spray layer is controlled according to the flue gas flow so as to control the partitions with the liquid distribution device turned on; thus, the spray water flow is reduced, and the heat exchange efficiency in the centralized area is higher.

Description

technical field [0001] The invention belongs to the technical field of flue gas heat recovery and purification, and in particular relates to a coal-fired flue gas residual energy recovery spray tower with load adaptability. Background technique [0002] my country is the world's largest coal producer and consumer, and is also a major economic country that uses coal as its primary energy source. The rapid development of power generation and heating industries has led to a continuous increase in my country's coal consumption. Coal combustion produces a large amount of sulfur oxides. Therefore, most of the coal-fired units in my country are equipped with wet desulfurization systems. According to the environmental protection regulations of different regions, the general flue gas passes through the wet electrostatic precipitator and then is discharged through the chimney or wet chimney. At this time, the The flue gas is saturated with moisture and carries a large amount of water v...

AI Technical Summary

Problems solved by technology

[0007] One aspect of the present disclosure provides a coal-fired flue gas residual energy recovery spray tower with load adaptability, which solves the problem of only adjusting by the heat pump itself, and there is a single adjustment method; and the unit starts and stops frequently, and the stabilization time is long, and The design of the heat pump unit should leave a large margin; and the overall spraying water volume remains unchanged, the power consumption of the water pump is large, and the temperature of the heat source water at the heat pump inlet decreases, which is not conducive to the improvement of the overall efficiency.

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