Thermal deviation calculation method based on real-time measurement data
A calculation method and real-time measurement technology, applied in the field of boilers, can solve problems such as heat absorption deviation errors
Pending Publication Date: 2022-04-15
北京京能电力股份有限公司 +1
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[0006] For this reason, the present invention provides a method for calculating heat deviation based on real-time measurement data to solve the problem that the heat absorption deviation in the prior art uses the empirical formula of parabolic distribution or double-hump distribution, and there is a large error between the actual heat absorption deviation
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[0046] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. 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.
[0047] Terms such as "upper", "lower", "left", "right", and "middle" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship shall also be regarded as the implementable scope of the present invention without substantive change of the technical content.
[0048] Such...
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The invention discloses a thermal deviation calculation method based on real-time measurement data, and the method comprises the steps: S1, calculating the non-uniform coefficient of the flue gas temperature of a pipeline where a measurement point is installed, and carrying out the fitting, and obtaining a continuous distribution function of the non-uniform coefficients of the flue gas temperature of all pipelines; s2, correcting and fitting by using the continuous distribution function of the flue gas temperature non-uniform coefficient and the thermal load non-uniform coefficient of the measuring point pipeline to obtain a distribution function of the thermal load non-uniform coefficient along the width direction; s3, iterative calculation of the outlet temperature of the target calculation pipe: assuming the outlet specific volume of the target pipe, calculating the flow deviation and the thermal load deviation, further calculating the outlet enthalpy value, calculating the outlet temperature according to the outlet enthalpy value and the outlet pressure, calculating whether the difference value between the outlet specific volume and the assumed value is in an error range, and if the error range is smaller than a preset value, executing the step S3; and outputting the outlet temperature. By utilizing the correlation between the outlet wall temperature and the thermal load, the thermal load distribution in the width direction matched with the actual operation is established, and the soft measurement of the wall temperature of the heating surface in the furnace is realized.
Description
technical field [0001] The invention relates to the technical field of boilers, in particular to a thermal deviation calculation method based on real-time measurement data. Background technique [0002] The high-temperature heating surface of the boiler, especially the working environment of the final superheater and final reheater is particularly harsh, and the tube explosion on the heating surface caused by over-temperature problems seriously affects the safe and stable operation of the boiler. The operation monitoring of the heating surface of the boiler in the existing power plant mainly relies on measuring points outside the furnace. The installation location is in the large bag on the top of the boiler, and the ambient temperature is about 400 degrees Celsius. Because the flue gas temperature in the boiler furnace is higher than the long-term stable operating temperature of general thermocouples, it is impossible to arrange thermocouples inside the boiler to monitor th...
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Inventor 孟旸闫新春季镇孙旺曹欢何凯周嘉炜宫俊峰白玉莲
Owner 北京京能电力股份有限公司