An energy-saving thermoelectric decoupling system and its operating method

Abstract

The invention provides an energy-saving thermoelectric decoupling system and an operating method thereof. The system comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine mediumand low-pressure cylinder, a condenser, a condensate pump, a low-pressure heater, a deaerator, a water feed pump and a high-pressure heater which communicate in sequence, and further comprises a mainsteam injection system, a reheat steam injection system and a heat supply network heat exchanger. The main steam flow going into the heat supply network heat exchanger is adjusted through a main steaminjection system high-pressure steam regulation valve and a main steam injection system bypass regulation valve which communicate with an inlet of the main steam injection system, and meanwhile, thereheat steam flow going into the heat supply network heat exchanger is adjusted, so that the ratio of the main steam flow going into the heat supply network heat exchanger to the reheat steam flow going into the heat supply network heat exchanger is equal to the ratio of the main steam flow going into the steam turbine high-pressure cylinder from the boiler to the reheat steam flow going into thesteam turbine medium and low-pressure cylinder. The energy-saving thermoelectric decoupling system is simple in structure, little in investment and high in energy utilization efficiency.

Description

technical field [0001] The invention relates to the technical field of cogeneration of heat and power, in particular to an energy-saving thermoelectric decoupling system and an operating method. Background technique [0002] Combined heat and power generation is the joint production of heat and electricity by generating units, and using combined heat and power units to supply external heat is an effective means to improve fuel utilization efficiency. However, with the growth of my country's power generation installed capacity, especially the growth of renewable energy power generation installed capacity, the utilization hours and load rate of combined heat and power units are generally low. Limited by the constraints of thermal and electrical loads, when the electrical load rate of cogeneration units is too low, it is difficult for the thermal load to meet user needs. Therefore, it is an urgent problem to be solved in my country's thermal power industry to realize thermoele...

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Problems solved by technology

Limited by the constraints of thermal and electrical loads, when the electrical load rate of cogeneration units is too low, the thermal load is difficult to meet user needs

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