Steam generator dry burning judgment method and anti-dry burning control method

Abstract

The invention relates to a steam generator dry burning judgment method and an anti-dry burning control method. The method comprises the steps that S1, a steam generator is started to work; S2, the working temperature T (n) of the steam generator is collected; S3, the T (n) is stored in an array; S4, differential processing is carried out on the working temperature, and dTc (n) is obtained; S5, dTc (n) is compared with Y, and Z is updated; S6, if Z is equal to X, the current working temperature T (n) is taken as the boiling temperature value of the steam generator, and if Z is less than X, the currently collected working temperature is updated Win; S7, the steps S4 to S6 are executed again; S8, if T (n) is larger than or equal to Tmax + M and dTc (n) is larger than or equal to dTcg, it is judged that the steam generator is subjected to dry burning, and if not, S7 is turned; and when dry burning is judged, water is supplied to the steam generator, and dry burning quitting judgment is carried out. According to the method, the stable boiling temperature value of the steam generator is determined, so that the dry burning judgment accuracy is improved.

Description

technical field [0001] The invention relates to a dry-burning prevention judging method, in particular to a steam generator dry-burning judging method and a dry-burning prevention control method. Background technique [0002] All steam boxes need a steam generator to generate steam. Without the assistance of other water level sensors, it is necessary to judge when the steam generator needs to replenish water, and it is necessary to judge when the steam generator is dry-burned. When the boiler is dry-fired, a fixed dry-burning temperature will be set. When the steam generator reaches this temperature, it will be judged as dry-burning. However, different steam generators are in different environments (such as different degrees of scaling, and the position of the NTC is slightly different) Both will lead to different dry-burning temperatures, and setting too high a dry-burning temperature will affect the life of the steam generator and thermostat. [0003] For example, the Chi...

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Problems solved by technology

However, in the above method, the stable temperature value used when judging whether the steam generator has entered a stable working state is a preset value, and only after the steam generator reaches a stable working state will it enter the subsequent dry burning detection process. The temperature will also be affected by the environment, so the accuracy rate of using a fixed value as a stable temperature value to judge the dry burning of the steam generator is low

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