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Device for preventing frequent movement of auxiliary steam header safety door of M701F combined circulation unit

A combined cycle unit, M701F technology, applied in the direction of engine starting, machine/engine, mechanical equipment, etc., can solve the problems of frequent operation of the safety door of the auxiliary steam main pipe, short service life of the safety door, abnormal auxiliary steam supply, etc., to achieve Avoid frequent movement, prolong service life, and prevent frequent movement

Pending Publication Date: 2018-09-04
SHENZHEN GUANGQIAN ELECTRIC POWER
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the safety door of the auxiliary steam main pipe of the existing combined cycle unit frequently operates, the auxiliary steam supply is abnormal, and the service life of the safety door is short. Devices that move frequently

Method used

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  • Device for preventing frequent movement of auxiliary steam header safety door of M701F combined circulation unit
  • Device for preventing frequent movement of auxiliary steam header safety door of M701F combined circulation unit

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specific Embodiment 1

[0024] refer to figure 1 , the specific embodiment 1 includes a low-pressure cylinder 7 and an auxiliary steam header 9, the output end of the auxiliary steam header 9 is connected to the input end of the low-pressure cylinder 7, and the output end of the auxiliary steam header 9 is connected to the input end of the low-pressure cylinder 7 Set cooling steam cut-off door 1, cooling steam regulating door 2, cooling steam isolation door 3 and pressure sensor 5 in sequence, so that the output end of auxiliary steam header 9 passes through cooling steam cut-off door 1, cooling steam regulating door 2, cooling steam isolation The door 3 is connected to the low-pressure cylinder 7 to form an auxiliary steam circuit; the LP main steam input end 8 is connected to the input end of the low-pressure cylinder 7 through the electric main steam isolation door 4 to form the main steam circuit; the input end of the pressure sensor 5 is connected to the low-pressure cylinder 7, the signal The o...

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Abstract

The invention relates to a device for preventing frequent movement of an auxiliary steam header safety door of an M701F combined circulation unit. The device is characterized in that a cooling steam intercept valve, a cooling steam adjusting valve, a cooling steam isolating valve and a pressure sensor are arranged sequentially at the junction of the output end of an auxiliary steam header and theinput end of a low-pressure cylinder, so that the output end of the auxiliary steam header communicates with the low-pressure cylinder through the cooling steam intercept valve, the cooling steam adjusting valve and the cooling steam isolating valve, and an auxiliary steam loop is formed; the LP main steam input end is connected with the input end of the low-pressure cylinder through an electric main steam isolating valve, and a main steam loop is formed; and the input end of the pressure sensor communicates with the low-pressure cylinder, the signal output end of the pressure sensor is connected with the signal input end of a distributed control system (DCS), and an auxiliary steam loop automatic control structure is formed. The device has the characteristics that frequent movement of theauxiliary steam header safety door of the M701F combined circulation unit is prevented, and normal steam supplying of auxiliary steam is guaranteed.

Description

technical field [0001] The invention relates to a device based on solving the frequent action of the safety door of the auxiliary steam main pipe of the M701F combined cycle unit. It belongs to the technical field of power generation industry and auxiliary equipment. Background technique [0002] At present, during the start-up process of the M701F combined cycle unit, auxiliary steam needs to be provided by the start-up boiler. An important user of the auxiliary steam is the cooling steam of the low-pressure cylinder. When the speed of the unit reaches 2000 rpm, the cooling steam of the low-pressure cylinder will be introduced to cool the final blades of the low-pressure cylinder. When the load of the unit reaches a certain stage, the low-pressure system will switch to the low-pressure main steam supplied by the boiler to enter the steam turbine, and the low-pressure cylinder will cool the steam. In the process of switching, due to the unreasonable control structure or lac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D19/00F01D25/12
CPCF01D19/00F01D25/12
Inventor 陈志伟周见广张俊伟
Owner SHENZHEN GUANGQIAN ELECTRIC POWER
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