A control method for a regenerative burner

Abstract

The invention discloses a control method of a regenerative burner. When the regenerative burner has no permanent flame, by optimizing the control program of the burner, the control is divided into an ignition mode and a normal operation mode, and the forced The regenerative burner in the state of smoke exhaust stores heat to a certain extent. After the reversing, the air takes away the heat stored in the regenerative volume to increase the air temperature, thereby increasing the calorific value of the mixed gas entering the burner. At this time, the ignition transformer discharges. It is easier to ignite low calorific value gas. By introducing this control method into the control of regenerative burners, the success rate of cold ignition can be effectively improved, the probability of detonation can be reduced, and the safety performance and combustion performance of the burner can be improved.

Description

technical field [0001] The invention belongs to the technical field of burner control, and in particular relates to a control method of a regenerative burner. Background technique [0002] Air single regenerative burner, referred to as regenerative burner, is a heating furnace that uses regenerative technology to recover waste heat from flue gas. This technology can make full use of low calorific value gas, so it has obvious energy saving advantages and avoids the direct discharge of low calorific value gas into the atmosphere to cause serious pollution, and is widely used in steel rolling furnaces of various iron and steel enterprises. However, there are still many problems in the use of regenerative burners, and the most influential problem is that the success rate of cold ignition is low, which affects the normal operation of the heating furnace. [0003] The existing use of regenerative burners: the heating furnace is divided into multiple heating areas, and each heatin...

AI Technical Summary

Problems solved by technology

[0010] (1) The air and gas intake volume of the regenerative burner is unbalanced, and the air-fuel ratio is not suitable, resulting in abnormal ignition or poor combustion state, excessive air or excessive gas, resulting in high energy consumption and insufficient combustion Easy to emit black smoke and other phenomena;

[0011] (2) The calorific value of gas is low, and it is difficult to ignite at room temperature, and because the regenerative burner is small in size and high in integration, it is impossible to install an eternal flame burner that burns high calorific value gas to ignite the calorific value. Low gas, so the success rate of cold ignition is very low, the safety performance is poor, and the unignited gas enters the exhaust main pipe and accumulates, which may cause an explosion;

[0012] (3) Before ignition and after ignition failure, unburned combustible gas and smoke accumulate in the radiant tube, and when the next ignition occurs, it is easy to fail to ignite or produce detonation, etc.

[0013] (4) There is no delay between the action of the gas solenoid valve and the action of the reversing valve, resulting in excessive gas intake and prone to detonation

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