Deep peak regulation dry and wet state switching system for supercritical boiler

A supercritical boiler and switching system technology, which is applied in the field of thermal power generation equipment heating and energy saving, can solve problems such as endangering the safe operation of the unit, violent fluctuations in unit parameters, and over-temperature tube explosion on the heating surface, shortening the start-up time and reducing the difficulty of transformation. , the effect of increasing boiler evaporation
CN114321871AInactive Publication Date: 2022-04-12GUODIAN SCI & TECH RES INST
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUODIAN SCI & TECH RES INST
Publication Date
2022-04-12
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a deep peak regulation dry and wet state switching system for a supercritical boiler, which comprises a multi-stage flow limiting device and a flash tank, after the supercritical boiler is switched to a wet state, high-temperature saturated water flows through the multi-stage flow limiting device through a pipeline for pressure reduction, and then enters the flash tank; expansion steam generated after expansion evaporation in the flash tank is divided into two paths, namely a first pipeline and a second pipeline, and the expansion steam in the first pipeline is drained to a steam inlet pipeline of a second high-pressure heater through a pipeline so as to replace part of extracted steam of the second high-pressure heater to heat feed water. The method is suitable for the supercritical boiler without a boiler water circulating pump to be converted from a dry state to a wet state for operation, and full recovery of working media and heat after the supercritical boiler is converted into the wet state for operation and continuous operation after deep peak regulation is converted into the wet state are achieved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The application belongs to the technical field of heat supply and energy saving for thermal power generation equipment, and in particular relates to a deep peak-shaving dry-wet state switching system for a supercritical boiler. Background technique

[0002] In recent years, with the rapid growth of my country's power generation installed capacity, especially the rapid development of new energy power generation, in order to better accommodate new energy power generation, it has become normal for large thermal power units to participate in deep peak-shaving operations. Affected by factors such as power peak regulation, as the load rate of the unit decreases, when the unit is deeply peaked to a lower load (below 30% load), the boiler of the supercritical unit will have a dry-wet transition phenomenon. During the dry-wet state switching process of the boiler, many systems are involved, the system is complex, and there are many equipment operating procedure...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More