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

Abstract

The invention relates to a combined cooling heating and power system and method based on an adsorption type heat pump and utilizing coal-fired flue gas. The system comprises a coal-fired unit flue gas pipeline, an adsorption type heat pump unit, a heat supply water pipe and a circulating gas channel; the coal-fired unit flue gas pipeline is connected with a first heat exchanger; a water outlet of a second heat exchanger is connected with a hot water tank; the first heat exchanger, the second heat exchanger, a first adsorption bed and a second adsorption bed are connected through a circulating heat source pipe; working mediums in the first adsorption bed, the second adsorption bed, a condenser and an evaporator form circulation through a medium flowing pipe; the hot water tank is further connected with a water outlet of the condenser, a hot water supply pipe and a third heat exchanger; the circulating gas channel is connected with the third heat exchanger; a water inlet of the evaporator is connected with the third heat exchanger; and a water outlet of the evaporator is connected with a cold water tank. High-temperature flue gas generated by fire coal can be utilized in a gradient mode to supply domestic hot water, heat supply and refrigeration, and a water storage tank is arranged, so that the stable heat and cold supply function in the peak period is achieved.

Description

technical field [0001] The invention belongs to the technical field of heat pump and refrigeration, in particular to a large-scale combined cooling, heating and power supply system that fully utilizes the temperature of boiler exhaust gas, and particularly relates to a combined cooling, heating and power supply system and method based on an adsorption heat pump and utilizing coal-fired flue gas . Background technique [0002] The energy crisis is a serious problem faced by countries all over the world. Combined cooling, heating and power 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 use the exhaust gas to drive the adsorption heat pump system, so that the silica-water or The CaCl2-NH3 working fluid will adsorb and desorb, generate cold or heat, and supply hot water or cold air to target users, thereby improving energy utilization ef...

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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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