Real-time identification method of dust deposition coefficient of typical heat exchange equipment in high temperature section of thermal power station

Abstract

The present invention provides a real-time identification method for the ash deposition coefficient of typical heat exchange equipment in the high temperature section of a thermal power station, including: S1, obtaining the structural parameters of the typical heat exchange equipment in the high temperature section, and the operating conditions of the heat exchange equipment at a given moment Data; S2, calculate the specific enthalpy and density of the inlet and outlet working fluid and outlet flue gas at the given moment; S3, calculate the heat absorption of the heat exchange equipment and the inlet flue gas temperature at the given moment; S4 calculate the heat exchange The actual heat transfer coefficient of the equipment; S5. Calculating the ideal heat transfer coefficient of the heat exchange equipment, combined with the actual heat transfer coefficient of the heat exchange equipment obtained in S4, calculating the ash deposition coefficient of the heat exchange equipment, thereby realizing the ash deposition coefficient of the heat exchange equipment real-time identification. The invention can be used to calculate the ideal heat transfer coefficient, heat transfer coefficient and ash deposition coefficient of typical heat exchange equipment (such as high temperature reheater) in the high temperature section in real time, so as to directly reflect the ash accumulation and slagging condition of the heat exchange equipment, and guide intelligent soot blowing, Potential applications for increasing boiler efficiency.

Description

technical field [0001] The invention relates to a parameter identification method of a thermal power station, in particular to a real-time identification method for the ash deposition coefficient of typical heat exchange equipment in the high temperature section of the thermal power station, and belongs to the field of real-time simulation and optimization control of thermal power generation. Background technique [0002] In recent years, my country has actively developed new energy power generation methods such as wind energy and nuclear fusion power generation, but the main power generation method is still coal-fired power generation. Since the coal contains 15% to 30% ash, ash accumulation and slagging will occur when the flue gas flows through the heating surfaces along the flue. Ash accumulation and slagging will cause the exhaust gas temperature to increase, the coal consumption of the unit will increase, and the heat transfer efficiency of the boiler will decrease. T...

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Problems solved by technology

Therefore, the method of calculating the ash accumulation and slagging in the low temperature section is no longer applicable to the high temperature section

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