Combined cooling, heating and power supply system and method based on adsorption heat pump using coal-fired flue gas

Abstract

The invention relates to a combined cooling, heating and power supply system and method based on an adsorption heat pump using coal-fired flue gas, including a coal-fired flue gas pipeline, an adsorption heat pump unit, a hot water supply pipe, and a circulating air channel; the coal-fired flue gas The pipeline is connected to the first heat exchanger, and the water outlet of the second heat exchanger is connected to the hot water tank; the first heat exchanger, the second heat exchanger, the first adsorption bed, and the second adsorption bed are connected by a circulating heat source The working medium in the first adsorption bed, the second adsorption bed, the condenser and the evaporator forms a circulation through the medium flow pipe; the hot water tank is also connected to the water outlet of the condenser, the water supply pipe and the third water exchange Heater; the circulating air passage is connected to the third heat exchanger, the water inlet of the evaporator is connected to the third heat exchanger, and the water outlet of the evaporator is connected to the cold water tank. The invention can use the high-temperature flue gas produced by coal combustion in stages to supply domestic hot water, heating and cooling, and is equipped with a water storage tank to realize stable heating / cooling functions during peak periods.

Description

technical field [0001] The invention belongs to the technical field of heat pumps and refrigeration, in particular to a large-scale combined cooling, heating and power supply system that makes full use of the exhaust gas temperature of a boiler, and in particular to a combined cooling, heating and power supply system and method based on an adsorption heat pump using coal-fired flue gas . Background technique [0002] The energy crisis is a serious problem facing all countries in the world. Combined cooling, heating and power supply can build a heat cascade utilization system for coal-fired power stations, use the high-temperature gas generated by coal combustion to heat supercritical steam to generate electricity, and exhaust exhaust gas to drive an adsorption heat pump system to make silica gel, water or CaCl2 and NH3 working fluids absorb and desorb to generate cooling or heat, and supply hot water or cold air to target users, thereby improving energy utilization efficien...

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Problems solved by technology

[0003] The current combined cooling, heating and power supply system is mostly aimed at internal combustion engines and gas turbines, and uses absorption heat pump systems such as lithium bromide. It is a small, distributed energy system. Due to the difficulty of regeneration of absorption heat pumps and high requirements for exhaust gas temperature, it is difficult to use coal-fired power plants. exhaust gas, and the installation and maintenance of the absorption unit is difficult

For traditional coal-fired power plants, the exhaust gas generated after boiler operation is directly discharged. The exhaust gas temperature of the 600 MW unit is 106~134°C, and the exhaust gas temperature of the 1000 MW unit is 112~127°C. Environment

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