A device and method for water collection and whitening of wet flue gas with low energy consumption

Abstract

The invention discloses a low-energy wet flue gas water collection and whitening device, comprising: a water collection and whitening tower and a cooling liquid circulation system; the water collecting and whitening tower is sequentially provided with a flue gas inlet, a washing and purification spray layer, Condensate collection layer, condensation cooling layer, drying and dehydration layer, mixed air dehumidification layer and flue gas outlet; the cooling liquid circulation system includes cooling liquid cooling tower, cooling liquid storage tank and cooling liquid circulation pump; the liquid inlet of the condensation cooling layer passes through The pipeline is connected with the liquid outlet of the cooling liquid circulating pump, the liquid outlet of the condensation cooling layer is connected with the liquid inlet of the cooling liquid cooling tower, and the cooling liquid storage tank is connected with the liquid outlet of the cooling liquid cooling tower and the liquid inlet of the cooling liquid circulating pump through the pipeline connected. The invention also discloses a water collecting and whitening method based on the water collecting and whitening device. Adopting the low-energy wet flue gas water collection and whitening method provided by the present invention can greatly reduce the investment and operation cost of industrial wet flue gas whitening, realize steam water recovery and resource utilization in wet flue gas, and reduce the investment cost of enterprise purification and environmental protection operation.

Description

technical field [0001] The invention relates to the field of resources and environment, in particular to a device and method for water collection and whitening of wet flue gas with low energy consumption. Background technique [0002] In the process of industrial production, various industrial devices will emit a large amount of high-humidity saturated flue gas into the ambient air, most of which the discharge temperature of industrial saturated wet flue gas is 50-60°C, and the water vapor in the wet flue gas accounts for 12- 18% for every 1m discharged into the environment 3 The wet flue gas emits about 120-180g of water vapor at the same time. [0003] The process of industrial wet flue gas emission discharges a large amount of water into the environment, resulting in a waste of water resources. According to preliminary statistics, my country discharges more than 5 billion tons of water into the ambient air every year due to wet flue gas emission. [0004] A large amount...

AI Technical Summary

Problems solved by technology

Affected by the ambient temperature, a large amount of ambient air is often required to mix with industrial wet flue gas. The air mixing device occupies a large area, and the energy consumption of the mixing fan is relatively high.

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