A Boiler Flue Gas Purification Waste Heat Utilization System with Concentration Function

Abstract

The invention discloses a boiler flue gas purification waste heat utilization system with concentration function, which comprises a wet desulfurization moisture absorption spray flue gas-salt liquid heat exchange device, flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger and salt liquid Concentration regeneration device, the inlet port of the wet desulfurization moisture absorption spray flue gas-salt liquid heat exchange device is connected with the flue gas outlet of the boiler, the gas outlet of the wet desulfurization moisture absorption spray flue gas-salt liquid heat exchange device is connected to the waste heat of the flue gas The air inlet of the direct heat exchange recovery flue gas-water heat exchanger is connected, and the exhaust port of the flue gas waste heat direct heat exchange recovery flue gas-water heat exchanger is connected with the air inlet of the chimney; the salt solution concentration regeneration device can The dilute salt liquid generated in the wet desulfurization moisture absorption spray flue gas-salt liquid heat exchange device is concentrated to form a concentrated salt liquid, which is sprayed by the wet desulfurization moisture absorption spray flue gas-salt liquid heat exchange device. The invention realizes the recycling of salt solution in the waste heat utilization and purification process of flue gas.

Description

Technical field [0001] The present invention relates to the field of flue gas treatment, and in particular, to a boiler flue gas purification waste heat utilization system having a concentrated function. Background technique [0002] As economic growth and the people's demand for life, it is necessary to increase energy demand. Since the reform and opening up, my country's energy consumption has been stable and growing, and the total energy consumption of energy in 2018 is 4.64GTCE, which is more than 1978. 7.13 Double, and the energy structure has also changed huge changes, coal, oil accounted for the total amount of energy consumption in energy consumption, and the proportion of clean energy consumption in natural gas, primary electricity and other energy is continuously improved. Although coal is an important part of energy, consumption has been less than 59.0% in total proportion, but coal consumption is still growing. The energy of natural gas and coal resources is converted...

AI Technical Summary

Problems solved by technology

However, the existing boiler flue gas treatment has relatively low desulfurization and denitrification efficiency, water pollution caused by salt solution after desulfurization, high acid dew point to avoid acid corrosion, high exhaust temperature, and large heat loss.

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