Low-vacuum absorption-type composite heat pump residual heat supply system based on ultra-great-temperature-difference heat supply network

Abstract

The invention relates to a low-vacuum absorption-type composite heat pump residual heat supply system based on an ultra-great-temperature-difference heat supply network, and belongs to the field of residual-heat-recovery-type cogeneration based on low-vacuum circulation water heating as well as absorption-type heat exchange. The low-vacuum absorption-type composite heat pump residual heat supply system comprises an absorption-type heat pump residual heat recovery device, a peak adjusting heater, a heat supply network ultra-great-temperature-difference heat exchange machine set as well as pipeline components. The low-vacuum absorption-type composite heat pump residual heat supply system is characterized by also comprising a direct dead steam recovery device as a water-based heat loading source of the heat supply network; a cold side inlet of the device is connected with a water return pipe of the heat supply network, and an outlet of the device is connected with a water inlet of an absorption-type heat pump heat supply network; a water outlet of the absorption-type heat pump heat supply network is connected with a water of a heat supply network of the peak adjusting heater; a water outlet of the heat supply network of the peak adjusting heater is connected with a water supply pipe of the heat supply network; dead steam enters the direct dead steam recovery device and the absorption-type heat pump evaporator. The low-vacuum absorption-type composite heat pump residual heat supply system provided by the invention is relatively higher in efficiency for thermal power plants than that in the conventional recovery mode for extracting residual heat from cooling water, can improve the dead steam residual heat utilization quantity by more than 1-2 times, and is especially suitable for central heat supply systems of middle and large sized turbosets.

Description

technical field [0001] The invention belongs to the field of cogeneration of heat and power based on waste heat recovery, and particularly relates to a waste steam direct recovery method and a heat supply system that combine low-vacuum waste heat recovery heat supply with thermal power plant absorption heat pump waste heat recovery heat supply. Background technique [0002] At present, the main system forms of heating in northern my country are: combined heat and power generation, regional boiler room and decentralized heating each account for about 1 / 3, among which combined heat and power generation has the highest primary energy utilization efficiency, the best emission reduction effect, and the most economical efficiency. The popularization and application are limited by factors such as increasing fuel prices and the difficulty of large-scale expansion of the heating network scale and its heating capacity. It is urgent to adopt better technical routes and policy planning fo...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical and economic deficiencies in the existing steam turbine waste heat recovery heating system, and propose a low-vacuum absorption heat pump composite waste heat heating system based on a super-large temperature difference heating network to achieve higher efficiency and larger The recovery of waste heat from waste steam is used for heating and reduces the heat consumption rate of thermal power plants

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