Steam and heat supply system for depth thermoelectric decoupling

Abstract

The invention discloses a steam and heat supply system for depth thermoelectric decoupling. The steam and heat supply system comprises a main steam pipeline, a steam turbine high pressure cylinder, adecoupling diversion pipeline, a steam increaser decoupling system, a boiler reheater and a steam turbine intermediate pressure cylinder; a power plant main steam pipeline is connected with the decoupling diversion pipeline; the power plant main steam pipeline is connected with the steam turbine high pressure cylinder; the decoupling diversion pipeline is connected with a power steam inlet of thesteam increaser decoupling system; the decoupling diversion pipeline also provides high parameter industrial steam to the outside; a steam exhaust pipeline at the hot end of the boiler reheater is connected with a suction steam port of the steam increaser decoupling system; a steam exhaust pipeline of the steam increaser decoupling system is connected with the cold end of the boiler reheater; andreheated steam exhausted at the hot end of the boiler reheater is connected with the steam turbine intermediate pressure cylinder through an intermediate pressure cylinder steam inlet pipeline. The purpose of depth thermoelectric decoupling is achieved, and industrial steam or heat supply capacity of a unit can be improved substantially.

Description

technical field [0001] The invention belongs to the field of thermal power plants, and in particular relates to a deep thermoelectric decoupling steam supply and heat supply system for flexible transformation of thermal power plants. Background technique [0002] With the increase of installed capacity of domestic wind power, solar energy and other new energy generators (all of which rank first in the world), coupled with the large-scale construction and operation of other forms of generator sets, China's power production capacity has become surplus, and many A serious phenomenon of abandoning wind and light has appeared in some places. To this end, the state requires that coal-fired units should implement flexible transformation (low power load operation), make way for non-water new energy power, and fully consume wind power and solar power. my country's wind power and solar energy are mainly concentrated in the northern region. Most of the coal power units in these areas...

AI Technical Summary

Problems solved by technology

Simply by reducing the temperature and pressure of the main steam or cold re-steam and then outputting it, it will cause adverse consequences: ① It will increase the flow deviation of the superheater and reheater; ② The flow and pressure of the reheater will be too small, and the reheater The heater is easy to burn out; ③ Thermoelectric decoupling cannot be realized

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