Rain curtain desulfurization spray tower

Abstract

The invention discloses a rain curtain type desulfuration spraying tower, and relates to a spraying tower which comprises a tank body, a pulse stirring water distribution tube, an oxidation air allocation tube, a partitioning plate component, a central exhaust tube component, a spiral tower plate component, a spraying tube component and a demister. According to the rain curtain type desulfuration spraying tower, a coal-fired flue gas can be washed by using a rain curtain type spraying structure, limestone slurry does not need to be atomized by using a spraying tube nozzle, and the grinding precision of limestone particles and the pressure of the outlet of a spraying circulation pump can be appropriately reduced, so that the spraying tube nozzle is liable to be blocked, the energy consumption of the spraying circulation pump is relatively low, and the operation cost of the rain curtain type desulfuration spraying tower can be lowered. An oxidation fan is conveyed into the rain curtain type desulfuration spraying tower to oxidize an exhaust gas after calcium sulfate in the limestone slurry, and the exhaust gas can be separated from the coal-fired flue gas, so that the content of oxygen in the coal-fired flue gas at the outlet of the rain curtain type desulfuration spraying tower can be relatively low, a later denitration process with a wet-method complexing absorption method is not affected, the process difficulties of the wet-method complexing absorption method can be solved, and low-cost application of the wet-method complexing absorption method can be promoted.

Description

technical field [0001] The invention relates to a rain curtain type desulfurization spray tower, which relates to a spray tower, in particular to a desulfurization spray tower which adopts a rain curtain type spray structure to wash coal-fired flue gas. Background technique [0002] The spray tower is a common equipment in the gas-liquid reaction system. Spray towers used in desulfurization projects usually use countercurrent spray towers, and limestone slurry is used as absorbent. The limestone slurry is transported to the atomizing nozzles of the spray pipes arranged at different heights in the spray tower through the circulating pump, and the limestone slurry is sprayed downward through the atomizing nozzles to form dispersed small droplets, and the coal-fired flue gas in the spray tower flows upward Flow, during the washing process of coal-fired flue gas, the gas-liquid is fully contacted, sulfur dioxide in coal-fired flue gas reacts with limestone slurry to form calciu...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem that the atomizing nozzle of the existing desulfurization spray tower is easily blocked, the energy consumption is large, and the oxygen content in the coal-fired flue gas at the exit of the desulfurization spray tower is high, which affects the follow-up denitrification process using the wet complexation absorption method. The shortcomings of the spray pipe nozzle are not easy to be blocked, the energy consumption is small, and the oxygen content in the coal-fired flue gas at the outlet of the spray tower is low, which does not affect the subsequent denitrification process using the wet complexation absorption method. Rain Desulfurization spray tower for washing coal-fired flue gas with curtain spray structure

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