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Intermediate-pressure cylinder rapid starting system for thermal power generation unit set

A unit unit, fast start-up technology, applied in the direction of engine start, engine components, machines/engines, etc., can solve the problems of difficulty in meeting the fast peak-shaving of the power grid, long start-up time, etc.

Inactive Publication Date: 2015-07-15
钱诚
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, the start-up time of the generator set is very long, and it is difficult to meet the requirements of fast peak regulation for the power grid

Method used

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  • Intermediate-pressure cylinder rapid starting system for thermal power generation unit set

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Embodiment Construction

[0017] refer to figure 1 , figure 1 Shown is a system improvement method pointed out by the present invention. Among them, the part inside the dotted line is the improved part, and the part outside the dotted line is the original system.

[0018] When the unit is started, the steam turbine side opens the vacuum valve of the high-pressure cylinder to vacuumize the high-pressure cylinder when the newly added steam switching stop valve (V1) of the unit and the steam switching regulating valve (V2) of the unit are closed. And gradually open the steam switching shut-off valve (V3) of the adjacent unit until it is fully open, and then gradually open the steam switching desuperheating and pressure reducing valve (V4) of the adjacent unit. At this time, the main steam (or reheated steam) of the adjacent steam turbine passes through the steam trap before the medium pressure main steam valve of the unit to heat the relevant pipelines. When the temperature of the steam in front of the...

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Abstract

The invention discloses an intermediate-pressure cylinder rapid starting system for a thermal power generation unit set. In the system, a steam-water system of a thermal power plant unit generator set is improved specific to a set adopting an intermediate-pressure cylinder starting way. The improvements are that: a cutoff valve (V1) and a regulating valve (V2) are added on an original reheated steam pipeline of a steam turbine of the set; a branch is added on a condensed water pipeline of the set, and condensed water flowing through the regulating valve (V5) is supplied to an adjacent set steam condenser; a branch is added on a main steam (or reheated steam) pipeline of an adjacent set, and steam flowing through a cutoff valve (V3) and a cooling and decompressing valve (V4) is supplied in front of an intermediate-pressure main steam valve of the steam turbine. By adopting the system, the starting grid-connection time of a coal burning (thermal) power plant unit set can be shortened, and the peaking performance of a coal burning (thermal) generator set is improved.

Description

technical field [0001] The invention relates to an improvement of a quick start system of a unit-system thermal power generating set, and is aimed at a set adopting a medium-pressure cylinder starting mode. It belongs to the field of coal-fired power generation, and is especially suitable for large and medium-sized coal-fired power generation unit units. Background technique [0002] In the context of thermal power generation units burning a large amount of fossil fuels, emitting a large amount of harmful gases and dust, leading to climate change and smog, renewable energy such as wind energy and solar energy is increasingly being introduced into the power grid. However, due to the intermittent and uncontrollable nature of renewable energy generation, the grid requires increasingly larger backup capacity. On the one hand, based on the specific national conditions in which coal-fired thermal power generation accounts for a considerable proportion in my country, there will be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D19/00
Inventor 钱诚
Owner 钱诚
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