Combustion control method for regenerative-combustion heating furnace

Abstract

In a regenerative-combustion heating furnace provided with at least a pair of regenerative burners, regenerators of the regenerative burners or exhaust gas discharge pipes and the like for discharging a combustion exhaust gas are prevented from corroding when the paired regenerative burners are in operation stop. [Solution] In a heating furnace 10 provided with at least a pair of regenerative burners 20 each including a burner portion 21 equipped with a fuel injection nozzle 25 and a regenerator 22 accommodating a heat storage material 22a, 22b therein, when combusting and heat storing operations in the paired regenerative burners are stopped, a combustion air is temporarily supplied to a regenerative burner 20b which is performing, at the time of operation stop, an operation of introducing the combustion exhaust gas into the regenerator 22 and allowing the heat storage material 22b to store heat from the combustion exhaust gas before discharging the combustion exhaust gas.

Description

[0001] related application [0002] This application claims priority from Japanese Patent Application No. 2009-7447. technical field [0003] The present invention relates to a combustion control method of a regenerative combustion type heating furnace, wherein a heat treatment method of at least one pair of regenerative burners including a burner portion having a fuel injection nozzle and a regenerator chamber containing a regenerative material is provided. In the furnace, in one of the pair of regenerative burners, the combustion air is guided to the burner part through the regenerator, and the fuel gas is injected from the fuel injection nozzle of the burner part. Combustion is carried out, and on the other hand, in another regenerative burner, the combustion exhaust gas is guided to the above-mentioned regenerator, and the heat of the combustion exhaust gas is accumulated in the heat storage material and discharged, and the above-mentioned operations are alternately perfor...

AI Technical Summary

Problems solved by technology

[0008] However, when the combustion and heat storage of multiple pairs of regenerative burners are appropriately stopped and controlled, for a pair of regenerative burners whose combustion and heat storage are stopped for a long time, similar to the above case, there may be The following problem is that in a regenerative burner that guides the combustion exhaust gas to the regenerator when it is stopped, and stores the heat of the combustion exhaust gas in the regenerator material and discharges it, the interior of the regenerator and the exhaust gas discharge pipe are damaged. Acid corrosion caused by cooling condensation of combustion exhaust gas

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