Double-curtain smoke isolation tunnel kiln

Abstract

The invention relates to an industrial kiln, in particular to a double-curtain smoke isolation tunnel kiln. The double-curtain smoke isolation tunnel kiln is provided with a kiln body, a first curtain device is arranged on the rear half of a first section of a quenching zone of the kiln body and comprises two rows of nozzle pipes which are perpendicularly and oppositely arranged, the nozzle pipes are communicated with external gas sources of gas supply pipes A, and nozzles of the nozzle pipes and the cross section of the kiln body form a zero-degree included angle. The double-curtain smoke isolation tunnel kiln is characterized in that a second curtain device is mounted behind the first curtain device and comprises two inclined nozzle pipes which are perpendicularly and oppositely arranged. The inclined nozzle pipes are communicated with external gas sources of gas supply pipes B, and nozzles of the inclined nozzle pipes and the cross section of the kiln body form inclined angles having certain degrees and opposite to the moving direction of a kiln car. The double-curtain smoke isolation tunnel kiln overcomes the defects that existing single-curtain smoke isolation is poor in effect, the pullover position of the kiln car is unreasonable and smoke isolation effect is affected and the like and is mainly used for production of the ceramic industry.

Description

technical field [0001] The invention relates to an industrial kiln, in particular to a tunnel kiln with double gas curtains for isolating flue gas. Background technique [0002] An air curtain device is usually installed at the first section of the quenching zone of the ceramic tunnel kiln to prevent the flow of air between the firing zone and the quenching zone. The existing air curtain device usually has only one air curtain, which has a kiln body. The second half of the first section of the body quenching zone is equipped with a first air curtain device, which includes two rows of vertical and oppositely arranged air injection pipes. The nozzle of the air pipe is arranged at an angle of 0° to the cross-section of the kiln body. The effect of this single-layer air curtain device is not ideal for isolating the series flow, and some of the flue gas from the firing zone enters the quenching zone, causing energy waste, or the cooling zone in the quenching zone The air is pour...

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