Medium-pressure steam system and its start-stop control method for two-to-one units in a gas-fired thermal power plant
A steam system, start-stop control technology, applied in the control system, steam generation, steam generation device, etc., can solve the problem of unbalanced steam electric valve pressure difference, etc., to achieve the effect of automatic steam merging
Active Publication Date: 2016-10-05
NORTH CHINA ELECTRICAL POWER RES INST +1
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Problems solved by technology
[0002] The main function of the medium-pressure steam system in a gas-fired thermal power plant is to connect the steam from the medium-pressure steam drum of the waste heat boiler to the medium-pressure cylinder of the steam turbine to do work. The role of steam, unable to balance the pressure difference between the front and back of the steam electric door
In addition, the existing medium-pressure steam system of the gas-fired thermal power plant cannot automatically switch on the medium-pressure steam system on this side when the medium-pressure steam system on this side is withdrawn; ; and it is impossible to realize the automatic steam paralleling of the medium-pressure steam system on this side when the medium-pressure steam system on the other side is put into operation.
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[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0041] The embodiment of the present invention provides a medium-pressure steam system of a two-to-one unit in a gas-fired thermal power plant, such as figure 1 As shown, the medium-pressure steam system of the two-to-one unit of the gas-fired thermal power plant includes: #1 medium-pressure steam system, #2 medium-pressure steam system and steam turbine medium-pressure cylinder 23, #1 medium-pressure steam system passes through #1 medium-pressure steam pipelin...
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The invention relates to a medium-pressure steam system for a two-pull-one unit of a fuel gas thermal power plant and a start-stop control method of the medium-pressure steam system. The medium-pressure steam system comprises a first medium-pressure steam system, a second medium-pressure steam system and a steam turbine medium-pressure cylinder, wherein the first medium-pressure steam system comprises a first medium-pressure steam pipeline, a first medium-pressure steam converging electric door, a first medium-pressure steam converging bypass electric door, a first medium-pressure bypass control valve, a first medium side temperature-reducing water pipeline, a first low side temperature-reducing water regulating valve and a first low side temperature-reducing water electric valve; the second medium-pressure steam system comprises a second medium-pressure steam pipeline, a second medium-pressure steam converging electric door, a second medium-pressure steam converging bypass electric door, a second medium-pressure bypass control valve, a second medium side temperature-reducing water pipeline, a second low side temperature-reducing water regulating valve and a second low side temperature-reducing water electric valve. According to the invention, automatic investment can be realized in the steam withdrawing state of the medium-pressure steam system on the side; in the investment state, automatic steam withdrawing or automatic steam converging of the medium-pressure steam system on the side is realized.
Description
technical field [0001] The invention relates to the medium-pressure steam technology of a gas-fired thermal power plant, in particular to a medium-pressure steam system of a two-to-one unit in a gas-fired thermal power plant and a start-stop control method thereof. Background technique [0002] The main function of the medium-pressure steam system in a gas-fired thermal power plant is to connect the steam from the medium-pressure steam drum of the waste heat boiler to the medium-pressure cylinder of the steam turbine to do work. The effect of steam cannot balance the pressure difference between the front and back of the steam electric door. In addition, the existing medium-pressure steam system of the gas-fired thermal power plant cannot automatically switch on the medium-pressure steam system on this side when the medium-pressure steam system on this side is withdrawn; ; And it is impossible to realize the automatic paralleling of the medium-pressure steam system on this s...
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IPC IPC(8): F22B33/18F22B35/00F01D17/10
Inventor 任彦黄葆华司派友刘双白吕炜左川
Owner NORTH CHINA ELECTRICAL POWER RES INST