Flue gas condensing, dehumidifying and then heating system and method utilizing compressive heat pump

Abstract

The invention discloses a flue gas condensing, dehumidifying and then heating system and method utilizing a compressive heat pump. An outlet of a desulfurization absorbing tower communicates with an inlet in the heat-releasing side of a heat pump evaporator, an outlet in the heat-releasing side of the heat pump evaporator communicates with an inlet in the heat-absorption side of a heat pump flue gas heater, and an outlet in the heat-absorption side of the heat pump flue gas heater communicates with an inlet of a chimney; and an outlet in the heat-absorption side of the heat pump evaporator communicates with an inlet in the heat-releasing side of a heating network water heater through a heat pump compressor, an outlet in the heat-releasing side of the heating network water heater communicates with an inlet in the heat-releasing side of the heat pump flue gas heater, and an outlet in the heat-releasing side of the heat pump flue gas heater communicates with an inlet in the heat-absorption side of the heat pump evaporator. According to the flue gas condensing, dehumidifying and then heating system and method utilizing the compressive heat pump, heat in flue gas output from the desulfurization absorbing tower can be recovered, meanwhile, the quantity of condensable particulate matter in the flue gas discharged from the chimney can be decreased, and the phenomenon that white smoke is discharged from the chimney and the chimney rain phenomenon are avoided.

Description

technical field [0001] The invention belongs to the field of energy conservation and environmental protection, and relates to a flue gas condensation dehumidification reheating system and method, in particular to a flue gas condensation dehumidification reheating system and method using a compression heat pump. Background technique [0002] In the field of flue gas desulfurization, more than 90% of them currently adopt the wet flue gas desulfurization process, and the saturated wet flue gas after desulfurization is discharged through the wet chimney. The flue gas in the chimney is in a saturated state, the temperature is generally 40°C-55°C, the saturated flue gas discharged is rapidly cooled by the lower temperature atmosphere, the water vapor in the flue gas condenses into a liquid state, and the transmittance of the flue gas decreases, resulting in The phenomenon of white smoke from the chimney and the phenomenon of chimney rain, while the exhausted flue gas contains a la...

AI Technical Summary

Problems solved by technology

The flue gas in the chimney is in a saturated state, the temperature is generally 40°C-55°C, the saturated flue gas discharged is rapidly cooled by the lower temperature atmosphere, the water vapor in the flue gas condenses into a liquid state, and the transmittance of the flue gas decreases, resulting in The phenomenon of white smoke from the chimney and the phenomenon of chimney rain, while the exhausted flue gas contains a large amount of condensable particulate matter such as soluble salt, sulfuric acid mist and organic matter, and causes a waste of heat

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