A trapezoidal grate hot blast stove with V-shaped slits

Abstract

The invention discloses a trapezoidal grate hot blast stove with V-shaped slits, which comprises a furnace body, a furnace top, a furnace door, an ash door, a combustion-supporting blower pipe, a lining and a fire grate; the furnace roof is arranged on the top of the furnace body, The corrugated fins are welded on the top of the furnace, which increases the heat exchange area between the cold air and the flue gas, which is beneficial to the heat exchange between the cold air and the flue gas; The trapezoidal structure is beneficial to concentrate the coal in the middle position for combustion. The V-shaped slit is used as the secondary air inlet. The air entering the combustion area from the V-shaped slit can provide oxygen for the reburning of the volatile components produced during the pyrolysis of the coal block. , and can be used as the overburning wind to provide oxygen for its burnout, so that the coal can be burned more fully, thereby improving the coal combustion efficiency; since the coal is mainly burned at the position behind the middle of the grate, the grate near the furnace door is The flat plate allows more air to enter the middle rear of the furnace, which is conducive to the complete combustion of fuel.

Description

technical field [0001] The invention relates to a hot blast stove used in a barn, in particular to a hot blast stove suitable for a tobacco barn. Background technique [0002] At present, most of the heating equipment for flue-cured tobacco barns are processed and manufactured according to the State Tobacco Office [2009] No. 418. The lower part of the row directly enters the air, and the upper part directly exhausts the smoke. The disadvantages of this combustion chamber are: the grate area is too large, when the coal is added to the furnace, the spreading area is too large, and the coal far away from the combustion center is not fully burned. The coal utilization rate is reduced; the insulation effect of the furnace door is poor, and the heat in the furnace is dissipated from the furnace door. In the furnace, when the cold air flows through the furnace body from bottom to top, it takes away too much heat, resulting in a decrease in the temperature of the combustion area in...

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Problems solved by technology

[0002] At present, most of the heating equipment for flue-cured tobacco barns are processed and manufactured according to the State Tobacco Office [2009] No. 418. The lower part of the row directly enters the air, and the upper part directly exhausts the smoke. The disadvantages of this combustion chamber are: the grate area is too large, when the coal is added to the furnace, the spreading area is too large, and the coal far away from the combustion center is not fully burned. The coal utilization rate is reduced; the insulation effect of the furnace door is poor, and the heat in the furnace is dissipated from the furnace door. In the furnace, when the cold air flows through the furnace body from bottom to top, it takes away too much heat, resulting in a decrease in the temperature of the combustion area in the furnace, resulting in incomplete combustion of fuel, resulting in a high concentration of carbon monoxide in the chimney tail gas

In addition, the furnace outlet is relatively large, and the flue gas stays in the furnace for a short time. The volatile components (including fine coal particles and combustible gaseous substances) produced during the pyrolysis of the coal block are not fully combusted in the furnace. The gas is discharged from the furnace, and the flue gas contains a large amount of unburned volatile matter and unburned fine coal particles, resulting in an increase in coal consumption and a decrease in thermal efficiency of the furnace.

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