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Combustion stability determining method based on thermal decomposition

A technology of combustion stability and thermal decomposition, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of lag in monitoring and judgment results, fast fluctuation frequency, and large fluctuation range of flame center offset distance. Achieve full load forecast, improve applicability, avoid lag and random effects

Active Publication Date: 2015-08-19
SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG +1
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Problems solved by technology

[0004] There are three deficiencies in the current method for determining the combustion stability of the furnace: 1. There is always pressure pulsation in boiler combustion, and it is difficult to monitor the pressure pulsation signal in this state when random fluctuations occur; 2. Use image analysis technology to process images The obtained flame center offset distance has a large fluctuation range and fast fluctuation frequency, which is not conducive to reflecting the overall situation of combustion; 3. The monitoring and judgment results are lagging behind, and the fault often occurs after the monitoring finds the problem, and it is too late to take preventive measures. Instructive is not strong

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  • Combustion stability determining method based on thermal decomposition
  • Combustion stability determining method based on thermal decomposition
  • Combustion stability determining method based on thermal decomposition

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] In order to be able to judge the combustion stability of the coal-fired boiler of the power station earlier, to make an early judgment on whether to use it, or to take relevant measures as soon as possible to improve the safety of the stable combustion of the boiler, the implementation case of the present invention provides a combustion stability Judgment method, process see figure 1 , see the description below:

[0039] (1) Dry a certain amount of raw coal samples and grind them into small particles with a particle size of 90 μm to 200 μm, place them in an incubator at 80°C and dry them slowly, and sieve the dried coal powder particles again to obtain granules A small sample of pulverized coal particles with moderate diameter and moisture content.

[0040] (2) Carry out industrial analysis on the raw coal into the furnace to obtain ...

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Abstract

The invention relates to a combustion stability determining method based on thermal decomposition. The pulverized coal combustion stability determination condition is acquired by the raw coal thermal decomposition method, the boiler design parameters are combined additionally, and the combustion stability of one power plant boiler is predicted previously. Compared with the prior art, the method has the advantages that the target of preventing and intervening power plant boiler blended combustion previously is achieved, the hysteresis and randomness caused by real-time monitoring are avoided, the full-load prediction of pulverized coal combustion stability can be implemented, and the applicability of combustion stability determination is improved.

Description

technical field [0001] The invention relates to a combustion stability analysis technology of a power station boiler, in particular to a combustion stability judgment method based on thermal decomposition. Background technique [0002] Ultra-supercritical large-capacity power plant boilers have become a trend in the domestic power generation industry, and their high-efficiency performance, low pollutant emissions and low unit capacity cost have obvious advantages. Large-capacity boilers have a huge impact on the security of the power grid. Therefore, the safety requirements of large-capacity boilers are getting higher and higher. However, affected by the coal market, the changeable coal types and coal quality as well as the mixed and blended coals have a significant impact on the safety of the combustion of large-capacity boilers, manifested in unstable combustion, large fluctuations in furnace pressure, excessive steam Dramatic changes in heat, etc. If the combustion is u...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 武广富王健吕晓东
Owner SHANGHAI MINGHUA ELECTRIC POWER TECH & ENG
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