Energy-saving type thermal power plant flue gas moisture recovering system

Abstract

The invention provides an energy-saving type thermal power plant flue gas moisture recovering system. The energy-saving type thermal power plant flue gas moisture recovering system comprises a wet-type desulfurizing tower, a flue gas condensation system, an absorption heat pump, a flue gas reheater and a chimney. The flue gas condensation system comprises an internal heat exchange tube bank, a spraying device, a condensation water tank and a circulating pump. The absorption heat pump comprises an absorber, a condenser, an evaporator and a generator. According to the energy-saving type thermal power plant flue gas moisture recovering system disclosed by the invention, moisture in flue gas can be recovered, and meanwhile the recovering system is matched with the absorption heat pump to recover low-grade waste heat in the flue gas, and obtained medium-grade heat energy can be used for a dry flue gas exhaust flue gas reheating system and other systems, so that energy consumption is reduced, water consumption cost is also reduced, pollutant handling capacity is improved, and the comprehensive energy utilization rate of a thermal power plant is increased.

Description

technical field [0001] The invention relates to a thermal power plant resource reuse system, in particular to an energy-saving thermal power plant flue gas moisture recovery system. Background technique [0002] With the improvement of my country's economic development level and the improvement of human living standards, the shortage of water resources is bound to become one of the hot issues that need to be focused on in the future. Thermal power plants, which are the main means of power generation in my country's power industry, may be restricted due to the shortage of water resources, or the high cost of water may reduce the economic benefits of thermal power plants. [0003] Thermal power fuel coal contains a lot of water, and a 600MW coal-fired unit discharges about 200t / h through the chimney, with an annual displacement of millions of tons. Recovering part of the moisture in the flue gas at the tail of the boiler and utilizing it as a resource is of great economic sig...

AI Technical Summary

Problems solved by technology

However, due to the low temperature of the flue at the tail of the boiler, the temperature of the circulating water for cooling it is also lower. How to use this part of ultra-low-grade heat energy is one of the problems in reducing the energy consumption of the flue gas water recovery technology.

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