Thermoelectric decoupling system and operation method of heat storage tank coupled absorption heat pump

Abstract

The invention discloses a thermal electrolytic coupling system of a heat storage tank coupling absorption heat pump and an operation method. The thermal electrolytic coupling system is composed of a heat storage tank, a hot water pump, a heat storage hot water regulating valve, a first exothermic hot water regulating valve, a second exothermic hot water regulating valve, a hot net heater, a heat user, a hot net circulating pump, a cold water pump, a heat storage cold water regulating valve, a first exothermic cold water regulating valve, a second exothermic cold water regulating valve, an evaporator, a first throttle valve, a condenser, a generator, a return heater, a second throttle valve, a solution pump, an absorber and a regulating valve. The invention further discloses the operation method of the system. According to the thermal electrolytic coupling system, an absorption type heat pump is additionally arranged in a cold water pipeline of the heat storage tank, so that the temperature of the cold water entering the heat storage tank is reduced, the temperature difference between the cold water and the hot water in the heat storage tank is expanded, the water quantity of the heat storage tank is reduced, the volume is reduced, meanwhile, the absorption type heat pump consumes part of heat supplied steam extraction of the steam turbine, the heat supplied steam extraction ofthe unit is promoted to be reduced, and the depth peak shaving performance of the cogeneration unit is improved.

Description

technical field [0001] The invention relates to a thermoelectric decoupling system, in particular to a thermoelectric decoupling system and an operation method of a heat storage tank coupled with an absorption heat pump. Background technique [0002] More than 70% of coal-fired power plants in my country are thermoelectric units, and the operation mode of cogeneration units that "determines electricity by heat" greatly limits their flexible operation. The space for wind power acceptance in the region is also greatly limited. In order to reduce environmental pollution, solve the increasingly serious problem of curtailed wind (light) and improve the capacity of absorbing new energy, it is necessary to improve the operating flexibility of thermal power units. An effective means to improve the flexibility of cogeneration units is thermoelectric decoupling transformation, and heat storage tank is an effective thermoelectric decoupling solution, which can play the role of "shaving...

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Problems solved by technology

[0003] However, the heat storage tanks used in thermal power plants are hot water heat storage tanks, which are large in size, occupy a large area, and require a large investment, which greatly restricts the application of heat storage tanks in thermal power plants. There are also certain restrictions on the improvement of the flexibility of cogeneration units

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