Method and device for improving thermal circulation efficiency

Abstract

Provided are a method and a device for improving thermal circulation efficiency. The method sends dead steam of a turbine into a condenser to exchange heat with coolant water in the condenser, temperature of the coolant water in an evaporator is decreased, the dead steam condensed and cooled flows into the condenser and then flows into a steam generator or a boiler to be warmed and pressurized, high temperature steam exhausted from the boiler or pumped from the turbine enters a generator to enable solution in the generator to be generated, generated coolant steam flows into the condenser, condensed coolant further enters the evaporator to be evaporated again and injected into the generator through an absorption circulation pump and an injection pump, and generated thick absorption liquid flow into an absorber and then enters the generator again with the coolant steam through the absorption circulation pump and the injection pump. The invention further comprises the device for improving thermal circulation efficiency of thermal power plants or nuclear power plants. The method and the device can reduce running cost, improve thermal circulation efficiency and have no pollution on the environment.

Description

technical field [0001] The invention relates to a method and a device for improving thermal cycle efficiency in thermal power plants or nuclear power plants. Background technique [0002] In order to improve the thermal cycle efficiency of thermal power plants or nuclear power plants today, they generally consider five aspects: adopting feedwater reheating cycle, improving steam parameters, adopting intermediate reheating cycle, adopting duplex combined cycle, and implementing combined heat and power generation. [0003] Feedwater recuperation cycle is adopted: part of the steam that has been expanded and done in the steam turbine is extracted from the steam turbine under a certain suitable parameter, and this part of steam is used to heat the feed water sent to the boiler. Compared with the pure condensation cycle, the heat loss to the cold source in the regenerative cycle is smaller, because the heat energy of the part of the steam extracted from the steam turbine is compl...

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Problems solved by technology

However, the existing absorption heat pump and condenser intermodal device also has the following disadvantages: the first is that it must rely on the cooling tower to support its Rankine cycle to continue, and at the same time cause waste of water resources and energy (even if the circulating cooling water is reused There is also a large amount of heat energy lost to the air), and the operating cost is high; the second is that it only partially couples the condenser and the evaporator of the heat pump system, and the heat energy obtained from the exhaust steam occupies a small part, and the efficiency of the thermodynamic cycle Low, and the obtained is used for heating, the economic benefit is not good

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