Optimal control method for improving automatic ignition success rate of boiler fuel oil

Abstract

The invention discloses an optimal control method for improving the automatic ignition success rate of boiler fuel oil, and belongs to the technical field of automatic ignition control of boiler fueloil. The optimal control method comprises an oil angle comprehensive control loop, an oil gun control loop, an igniter control loop, an oil angle valve control loop, a flame detector control loop andother sub-control loops. According to the technical scheme, on the basis that the automatic ignition sequence control principle of an existing oil system is basically not changed, the ignition time ofan igniter is properly advanced, the ignition time is properly prolonged, the problems that an electrode is polluted by water in fuel oil, short circuit is caused, and stable combustion energy is insufficient in the early stage of oil gun ignition are solved, and it is ensured that automatic ignition succeeds at a time; and automatic ignition time prolonging caused by unsuccessful ignition and the safety risk of boiler explosion caused by fuel oil accumulation are prevented. The optimal control method is simple in logic system and convenient to modify, and can effectively improve the automatic ignition success rate of boiler fuel oil.

Description

technical field [0001] The invention relates to an optimization control method for improving the success rate of automatic ignition of boiler fuel oil, and belongs to the technical field of automatic ignition control of boiler fuel oil in coal-fired power plants. Background technique [0002] At present, on the basis of using high-energy and high-frequency electric spark igniters, coal-fired power plants adopt automatic sequential control of oil angle to achieve fully automatic ignition. [0003] The ignition head of the high-energy high-frequency electric spark igniter is composed of a metal cathode and an anode. The working principle is that the cathode and anode are discharged under high voltage to generate high-frequency and high-energy electric sparks, which are quickly ignited by a special mechanical atomization device. Mist of light diesel oil sprayed from the oil gun. A spark cannot be produced if the metal cathode and anode of the igniter are shorted, so they are m...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and to provide an optimal control method for improving the success rate of automatic ignition of boiler fuel oil with reasonable design, simple operation and good effect, without changing the automatic ignition of the existing oil system. On the basis of the principle of ignition sequence control, the ignition time of the igniter is appropriately advanced, and the ignition time is appropriately extended to prevent the short circuit caused by water pollution in the fuel and the lack of stable combustion energy in the early stage of the oil gun ignition, so as to ensure the success of automatic ignition once , to prevent the safety risk of boiler deflagration caused by the extension of automatic ignition time caused by unsuccessful ignition and the accumulation of fuel oil

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