Closed circulatory phase-change heat supply system for heat and power cogeneration

Abstract

The invention provides a closed circulatory phase-change heat supply system for heat and power cogeneration, comprising a boiler, a turbine generator set, a heat accumulator, a heat device, a drain tank, a water storage tank, an economizer and an assorted connection pipe, a water pump, a control valve and the like. A steam pipe of the boiler for steam supply is connected with a steam inlet of the heat accumulator and a steam inlet of the turbine generator set; a steam supply inlet of the heat accumulator and a steam pumping and exhausting outlet of the turbine generator set are respectively connected with a steam inlet of the heat device to ensure that the heat accumulator adjusts the load of a heat supply system; the condensate water of the heat device is collected in the water storage tank after passing through the drain tank via a condensate water pipe; and a water outlet pipe of the water storage tank is connected to the economizer of the boiler, therefore, an enclosed circulatory heat supply system is formed. During the running of the system, the condensate water is not flashed and lost under the saturated high-temperature state, therefore, the heat utilization rate of the system is improved, both the whole system and the running are simplified, and the project investment and the operation cost are reduced.

Description

technical field [0001] The content of the invention belongs to the technical field of thermal energy engineering, and relates to a closed-cycle phase-change heating system for cogeneration of heat and power. Background technique [0002] At present, the known heating systems for combined heat and power generation in industrial enterprises mostly use condensing units or combined back pressure and condensing units for power supply and heating. It is also complicated; the condensing unit has heat loss from the cold source, and the heat energy utilization rate is low; most of the heating systems adopt simple open recovery of condensed water, and the flash heat is emptied; there is steam leakage in the steam trap of the heating equipment, causing A large part of heat energy is wasted; the structure of the open condensate system causes a large amount of air to dissolve into the condensed water, and the condensed water needs to be deaerated. Contents of the invention [0003] Th...

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Problems solved by technology

[0002] At present, the known heating systems for combined heat and power generation in industrial enterprises mostly use condensing units or combined back pressure and condensing units for power supply and heating. It is also complicated; the condensing unit has heat loss from the cold source, and the heat energy utilization rate is low; most of the heating systems adopt simple open recovery of condensed water, and the flash heat is emptied; there is steam leakage in the steam trap of the heating equipment, causing A large part of heat energy is wasted; the structure of the open condensation water system causes a large amount of air to dissolve into the condensation water, and the condensation water needs to be deaerated

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