Heating furnace emergency shutdown protection device and interlocking control method

Abstract

The invention relates to a heating furnace emergency shutdown protection device and an interlocking control method, and belongs to the technical field of heating furnace emergency shutdown protection. The protection device comprises a gas main pipe, a gas branch pipe and a nitrogen purging pipe, wherein a gas stop valve is arranged in the gas main pipe, the nitrogen purging pipe is detachably connected to the portion, behind the gas stop valve, of the gas main pipe, and an adjusting valve I is arranged in the nitrogen purging pipe. The multiple gas branch pipes are arranged, each gas branch pipe is connected with multiple burners, a stop valve II is installed in front of each burner, each gas branch pipe is connected with a bleeder I, and a stop valve III is installed in the bleeder I. The automatic remote interlocking control system has the beneficial effects that automatic remote interlocking control can be carried out when the furnace is shut down emergently, nitrogen replacement is carried out on the pipeline behind the main pipe valve, tempering accidents are avoided, meanwhile, the safety of maintenance of in-furnace maintenance personnel is guaranteed, and safe operation of a heating furnace at different furnace shutdown time is guaranteed.

Description

technical field [0001] The invention relates to the technical field of heating furnace emergency shutdown protection, in particular to a heating furnace emergency shutdown protection device and an interlocking control method. Background technique [0002] The gas fuel used in the heating furnace is coal gas. In the process of use, it is necessary to stop the furnace in case of power failure, water cut-off, fan stop and instrument gas source stop. At this time, the interlock protection program is started to close the quick-cut valve in the gas main pipe, but It takes time for each manual valve to close. Even if each burner is equipped with a quick-cut valve in front of the nozzle, it cannot be guaranteed that the valve of the quick-cut valve can be completely closed, especially for a heating furnace that has been used for a certain number of years. Strict phenomenon, in this case, when external factors cause interlock protection to cut off the gas emergency shutdown, it is e...

AI Technical Summary

Problems solved by technology

In the process of use, it is necessary to stop the furnace in case of power failure, water cut-off, fan stop and instrument gas source stop. At this time, the interlock protection program is started to close the quick-cut valve in the gas main pipe, but It takes time for each manual valve to close. Even if each burner is equipped with a quick-cut valve in front of the nozzle, it cannot be guaranteed that the valve of the quick-cut valve can be completely closed, especially for a heating furnace that has been used for a certain number of years. Strict phenomenon, in this case, when external factors cause the interlock protection to cut off the gas emergency shutdown, it is easy to flash back because the flame burning speed is greater than the gas flow rate, which brings certain safety hazards to the heating furnace

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