RB (Runback) mill-tripping control device and method for octagonal tangential coal-fired boiler

Abstract

The embodiment of the invention provides an RB (Runback) mill-tripping control device and method for an octagonal tangential coal-fired boiler. The device comprises a trigger, a judgement module and acontrol cabinet, wherein the trigger outputs an RB coal mill tripping signal in response to a trigger signal; the judgment module is connected with the trigger and the octagonal tangential coal-firedboiler and used for responding to the RB coal mill tripping signal output by the trigger and judging the number of coal mills currently running in the octagonal tangential coal-fired boiler; the control cabinet is connected with the judgment module and the octagonal tangential coal-fired boiler and used for executing a corresponding mill tripping circuit according to a judgment result output by the judgment module; different coal mills correspond to different mill tripping circuits; and the mill tripping circuits are used for sending a tripping instruction to the coal mills. By means of the RB (Runback) mill-tripping control device and method in the embodiment of the invention, the thermal load of the boiler can be quickly and safely reduced in the RB process, and the stability and safetyof a unit in the RB process are better guaranteed.

Description

Technical field[0001]The present application relates to the field of power plant unit control, and in particular, there is a RB jump control device and method for octagonal cutting coal-fired boiler.Background technique[0002]Auxiliary failure reduction load (Runback, RB), is a part of the major auxiliary machine fault trip, so that the maximum theoretical force of the unit is lower than the current actual load, the unit coordination control system reduces the unit load to all the auxiliary machines. The response is achieved and the control unit parameters can continue to operate within the allowable range. For the boiler system, since the RB is triggered, the RB is triggered to reduce the hot load of the boiler, the decrease in the matching electric power, and maintaining the appropriate boiler burning rate is important.[0003]At present, the arrangement of the boiler burner is generally designed to front and rear wall pair and the four-angle cut circle, and the coal mill is arranged...

AI Technical Summary

Problems solved by technology

For tower furnaces with an octagonal tangential combustion method, it is easy to cause the flame of the boiler to deflect, cause overheating of the wall temperature and water circulation failure, so that the safety of the unit in the RB process cannot be guaranteed.

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