System and method for recovering water of smoke based on fluorine plastic heat exchanger

Abstract

The invention relates to a system and a method for recovering water of smoke based on a fluorine plastic heat exchanger. The existing system cannot effectively recover the water of the smoke. The system for recovering the water of the smoke comprises an air preheater, a dust remover, an induced air fan, a desulfurizing tower and a chimney which are sequentially arranged on a flue along the smoke flowing direction, and is characterized by also comprising the fluorine plastic heat exchanger, a condensate recovery device, a smoke temperature tester, a heat medium water recovery pipe, a heat medium water inlet pipe, an electric adjusting valve, a circulating water pump, a water supplementing water tank and residual heat utilization equipment, wherein the fluorine plastic heat exchanger is positioned on the flue between the desulfurizing tower and the chimney; the condensate recovery device is fixedly connected with the fluorine plastic heat exchanger. The method for recovering the water of the smoke is characterized in that when the smoke flows through the fluorine plastic heat exchanger, the heat medium water in the fluorine plastic heat exchanger is heated by the smoke to generate high-temperature heat medium water, and the temperature of smoke is reduced to be lower than water dew point. The system and the method for recovering the water of the smoke have the advantages that the design is reasonable, and the function of recovering the water of smoke is effectively realized.

Description

technical field [0001] The present invention relates to a system and method for recovering water in flue gas, in particular to a system for recovering water in flue gas and a method for recovering water in flue gas based on fluoroplastic heat exchangers, which are mainly used for thermal power generation in the factory. Background technique [0002] The residual heat of flue gas carried by the smoke exhaust of thermal power plants is huge, and the water content in the flue gas is high. Especially for units burning lignite, the exhaust gas temperature is about 150°C, and the volumetric water content in the flue gas is about 15%. Therefore, reducing the exhaust gas temperature to below the water dew point, condensing the water vapor in the flue gas, and recycling the condensate is of great significance to solving the resource distribution dilemma of rich coal and water shortage in my country, especially in northern power plants. In addition, in the process of flue gas condensa...

AI Technical Summary

Problems solved by technology

If a metal heat exchanger is used to condense and recycle the water vapor in the flue gas, the low-temperature corrosion of the heat exchanger cannot be avoided, resulting in a series of problems such as regular maintenance and limited service life of the heat exchanger

[0004] To sum up, there is currently no system with reasonable structure design, unique conception, and effective recovery of water in flue gas.

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