A multifunctional flue gas waste heat recovery device

Abstract

The invention relates to a multifunctional flue gas waste heat recovery device. The device comprises a heating network water return pipeline, a heating network bypass pipeline, an absorption type heat pump, an electric heating pump, chemical adding equipment and a sprayed packing absorbing column. The sprayed packing absorbing column is divided into an absorption type heat pump cooling section, an electric heating pump cooling section, a liquid blocking section and a reheating section and sequentially comprises a column bottom water collecting tank, a smoke inlet, absorption type heat pump waste heat water heat exchange packing, an absorption type heat pump waste heat water distributor, an electric heating pump waste heat water collector, electric heating pump waste heat water heat exchange packing, an electric heating pump waste heat water distributor, a water blockage device, a smoke reheating device and a smoke outlet from bottom to top. Smoke sequentially passes through the absorption type heat pump cooling section, the electric heating pump cooling section, the liquid blocking section and the reheating section to complete cooling and heat removing, cooling and dehydrating, washing and sulfur removing and reheating of the smoke, and the reheated smoke is discharged through the smoke outlet. According to the device, deep recovery of waste heat in the smoke can be realized, pollutant emission can be reduced, and the phenomenon of discharging white smoke can be completely eliminated.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery from flue gas, and in particular relates to a multifunctional flue gas recovery device without white smoke. Background technique [0002] With the reduction of non-renewable energy sources such as coal, oil, and natural gas, energy prices are increasing day by day. Moreover, a large amount of pollutants are released during the combustion of fossil fuels, and air pollution is becoming more and more serious. Based on the current situation, reducing energy consumption and reducing pollutant emissions are effective methods before finding sustainable clean energy. [0003] At present, absorption heat pump technology is widely used in the field of waste heat recovery of gas-fired hot water boilers, which can reduce the boiler exhaust gas temperature to about 30°C, achieving the purpose of recovering waste heat of flue gas and saving gas. When the exhaust gas temperature is reduced to about...

AI Technical Summary

Problems solved by technology

[0004] In addition, the exhaust gas temperature of about 30°C cannot avoid "white smoke", especially in the morning and evening when the relative air humidity is high or in cloudy, rainy and snowy weather, the phenomenon of "white smoke" is even more difficult to solve

[0005] Although the "white smoke" of gas-fired boilers is not very harmful to human survival, since the boiler rooms for general heating are built in end-user sites and close to people's daily life environment, the obstruction of sunlight and visual pollution will also affect people. physical and mental health

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