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1045mw ultra-supercritical coal-fired unit boiler blowpipe debugging method and system

A coal-fired unit, ultra-supercritical technology, applied in the field of thermal power plants, can solve problems that endanger the safe operation of turbo-generator units, high-temperature corrosion, tube bursts, etc.

Active Publication Date: 2017-11-10
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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AI Technical Summary

Problems solved by technology

After the unit is put into production, these substances exist in the heating surface, causing blockage, pipe explosion and high-temperature corrosion of the heating surface pipes, or being brought into the steam turbine, which will endanger the safe operation of the steam turbine generator set
The traditional coal-fired unit boiler has the disadvantage of low safety in use

Method used

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  • 1045mw ultra-supercritical coal-fired unit boiler blowpipe debugging method and system
  • 1045mw ultra-supercritical coal-fired unit boiler blowpipe debugging method and system
  • 1045mw ultra-supercritical coal-fired unit boiler blowpipe debugging method and system

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Embodiment Construction

[0019] A blowpipe debugging method for a 1045MW ultra-supercritical coal-fired unit boiler is suitable for blowpipe debugging for a 1045MW ultra-supercritical coal-fired unit boiler. The boiler is an ultra-supercritical once-through boiler with variable pressure operation, which adopts a П-shaped layout, a single furnace, an intermediate reheating, and low NO X The main burner and high-level burn-off air staged combustion technology and reverse double tangential circular combustion method, the furnace is an internal thread tube vertical rising membrane water wall, and the atmosphere expansion type start-up system; in addition to the coal / water ratio, the temperature adjustment method also adopts Flue gas distribution baffle, burner swing, water spray, etc. The boiler adopts balanced ventilation, open-air layout, solid slag discharge, all-steel frame, and full-suspension structure. Each boiler is equipped with 6 medium-speed grinding and cooling primary fans, positive pressure...

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Abstract

The invention relates to a 1045MW ultra-supercritical coal-fired unit boiler blowpipe debugging method and system. After the boiler is flushed in a cold state, the superheater and the reheater are flushed with desuperheating water side pipelines, and the boiler is flushed in a hot state. Control the boiler to increase temperature and pressure, put it into the pulverizing system for test blowing treatment, flush the superheater and reheater with water vapor side pipeline, and purge the high pressure bypass pipeline. Control the boiler to increase the temperature and increase the pressure, carry out the series depressurization and purge of the primary and secondary steam systems, and purge the high-pressure bypass pipes and boiler blowpipe steam pipes. Control the boiler to increase the temperature and increase the pressure, carry out the series depressurization and purging of the primary and secondary steam systems until the target plate inspection meets the preset conditions, and purge the remaining soot-blowing steam pipes of the boiler body and the high-pressure steam inlet pipes of the small machine. Through the blowpipe debugging of the 1045MW ultra-supercritical coal-fired unit, the residues are avoided from causing hidden dangers to the safe operation of the steam turbine generator boiler, and the safety of the coal-fired unit boiler is improved.

Description

technical field [0001] The invention relates to the technical field of thermal power plants, in particular to a 1045MW ultra-supercritical coal-fired unit boiler blowpipe debugging method and system. Background technique [0002] Due to the manufacturing, installation, storage, transportation and other reasons of the newly installed coal-fired units, especially in the superheater, reheater system and steam pipes of the 1045MW ultra-supercritical coal-fired units, sand particles and iron oxide scales remain to varying degrees , iron filings, welding slag, and chemical cleaning materials that have not been rinsed off. When the unit is put into production, these substances exist in the heating surface, causing blockage, explosion and high-temperature corrosion of the tubes on the heating surface, or being brought into the steam turbine, which will endanger the safe operation of the steam turbine generator set. Traditional coal-fired unit boilers have the disadvantage of low sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23J3/02
Inventor 李德波李方勇周杰联钟俊许凯陈拓尹凯琪
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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