A solution deep dehumidification flue gas treatment system

Abstract

The invention discloses a flue gas treatment system capable of deeply dehumidifying solution. A spraying heat recycler, a spray tower, a dehumidifier and a flue gas reheater are successively arrangedon a flue gas treatment route and are respectively used for cooling and recycling recovery, condensation and dehumidification, deep dehumidification and reduction of relative humidity of the flue gas.Besides, a cooling tower, a solution regenerator, a water-solution heat exchanger and various recycling pumps are also arranged in the system, wherein the cooling tower is used for preparing coolingwater in the spray tower; the solution regenerator is used for regenerating a rare solution after dehumidification; the regenerated solution is heated by the hot water generated in the spraying heat recycler through the water-solution heat exchanger; the hot water is also transferred as a heat source into the flue gas reheater. The flue gas treatment system is capable of performing heat recoveringand deep dehumidification on high-temperature and high-humidity flue gas, effectively avoiding environment-polluting 'white smoke' or 'chimney rain' generated in the smoke exhausting process, and simultaneously achieving an environmental protection function and an energy-saving benefit of the system.

Description

technical field [0001] The invention belongs to the technical field of energy application and environmental treatment, and relates to a technology for dehumidification and purification of high-temperature and high-humidity flue gas before discharge, in particular to a technology for realizing heat recovery and cooling and dehumidification of flue gas, and performing deep dehumidification and purification of flue gas system. Background technique [0002] Large coal-fired power plants or heating boiler equipment often need to discharge a large amount of flue gas through the chimney during production work. This kind of untreated flue gas is basically in a high-temperature saturated state. During the process of being discharged into the atmosphere, due to the high moisture content of the flue gas and the temperature difference with the air, liquid water will be precipitated during the cooling and mixing process with the air. Easy to form "white plume" or "chimney rain". "White...

AI Technical Summary

Problems solved by technology

Compared with condensation dehumidification, the efficiency of solution dehumidification is higher, and the amount of solution used is significantly less than that of cooling water. In addition, considering the characteristics of solution circulation that can realize the effective utilization of low-temperature heat sources, it is possible to consider applying solution dehumidification technology to existing flue gas purification. and whitening system to solve the problems of large consumption of circulating water and incomplete dehumidification of flue gas

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