Desulfurizing absorption tower

Abstract

The invention relates to a desulfurizing absorption tower which comprises an absorption tower; a flue gas outlet is formed in the top of the absorption tower; a tower body is provided with a flue gas inlet; a size tank is arranged on the bottom of the tower; a gas desulfurizing layer is arranged between the flue gas outlet and the flue gas inlet, and is provided with a size spraying layer and a size injecting layer below the size spraying layer; a spray nozzle of the size spraying layer is arranged downwards; the spray nozzle of the size spraying layer is arranged upwards; and flue gas is firstly in contact with the size injecting layer so as to be desulfurized after entering from the flue gas inlet, then is in contact with the size spraying layer so as to be desulfurized, and is discharged out from the flue gas outlet after fog drops in the flue gas is removed through a defogger above the spraying layer. According to the desulfurizing absorption tower, two different kinds of spraying modes are adopted for desulfurizing the flue gas; the contact area and the contact time of the flue gas and size are enlarged; the mixing degree of the flue gas and the size and the liquid-gas ratio of the absorption tower are improved; the desulfurizing efficiency is improved; and the pollution to the environment is lowered.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a desulfurization absorption tower. Background technique [0002] Coal-fired power generation is one of the main ways of coal utilization. Coal-fired thermal power units need to emit a large amount of pollutants, among which SO 2 And dust is more serious harm to the environment, and it is also the main pollutant that needs to be controlled. Therefore, it is necessary to install a desulfurization system at the flue gas discharge of coal-fired power generation. Flue gas desulfurization technologies include wet desulfurization and dry desulfurization, among which wet desulfurization technology is the most widely used. The principle of the wet flue gas desulfurization absorption tower is to use limestone alkaline slurry to spray from top to bottom, the flue gas flows from bottom to top, and the limestone slurry droplets absorb SO in the flue gas during the falling pro...

AI Technical Summary

Problems solved by technology

However, the gas velocity in the desulfurization tower is very fast, and the gas flow rate is also large, so that the flue gas and the desulfurization liquid cannot be effectively and fully contacted, which reduces the desulfurization efficiency.

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