Adjustment method and system for overtemperature of wall temperature of low-temperature reheater, storage medium and terminal

Abstract

The invention provides an adjustment method and system for overtemperature of the wall temperature of a low-temperature reheater, a storage medium and a terminal. The method comprises the following steps that S1, the wall temperature distribution condition of the low-temperature reheater is subjected to statistic analysis; S2, the change condition of the wall temperature of the low-temperature reheater along with the load of a unit and the operation state of the unit are analyzed; S3, the coal quality change conditions before and after wall temperature deterioration of the low-temperature reheater are analyzed; S4, the fineness of pulverized coal of coal mills is tested, and the fineness condition of the pulverized coal of each coal mill is known; S5, according to the influence condition of coal quality on the wall temperature of the low-temperature reheater, blending combustion is carried out on coal types not prone to coking; S6, the fineness of the pulverized coal of each coal mill is adjusted; S7, the soot blowing stroke is added in the low-temperature reheater area, and soot blowing is enhanced; and S8, after adjustment, the change condition of the wall temperature of the low-temperature reheater is subjected to statistic analysis, and the adjustment effect is evaluated. The problems of large deviation of the wall temperature of the low-temperature reheater, overtemperature of the wall temperature of the low-temperature reheater and the like are effectively relieved, and safe and stable operation of a boiler is guaranteed.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a method, a system, a storage medium and a terminal for adjusting the wall temperature overtemperature of a low-temperature reheater. Background technique [0002] At present, many coal-fired power plant boilers at home and abroad have the problem of large wall temperature deviation on the heating surface and even overtemperature of the wall. Long-term metal overtemperature will inevitably affect the life of the metal and seriously threaten the safe operation of the unit. Common heating surface overtemperature problems of coal-fired boilers are mainly concentrated in water-cooled walls, panel superheaters, high-temperature superheaters and high-temperature reheaters. There are many countermeasures for the above-mentioned heating surface wall temperature overtemperature problems. The temperature situation can be effectively alleviated by means of combustion adjustment, etc., and t...

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Problems solved by technology

[0003] The problem of overtemperature of the wall temperature of the low-temperature reheater of the opposed combustion boiler also occurs from time to time, but because the low-temperature reheater is arranged in the tail flue of the boiler, conventional combustion adjustment can alleviate the large deviation of the wall temperature of the low-temperature reheater and the overtemperature of the wall Questions have limited effect

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