Drying boxes for hot-blast air furnace

Abstract

The invention relates to drying boxes for a hot-blast air furnace. A humidity-discharging box is arranged in the middle of left and right drying boxes; balanced hot-blast air boxes are arranged at left and right ends of the left and right drying boxes; a waste heat recovery box is arranged on the top of the humidity-discharging box; a tube type heat exchanger is arranged in the waste heat recovery box; the bottom of the tube type heat exchanger is communicated with the humidity-discharging box; a fresh air suction inlet is formed at the front end of the tube type heat exchanger, and an air-collecting box is arranged at the rear end of the tube type heat exchanger; the end part of the air-collecting box is connected with the air inlet of a centrifugal fan; the air outlet of the centrifugal fan is connected with the air inlet of a hot-blast air furnace; and the top of the waste heat recovery box is opening and is used as a humidity-discharging opening. In the drying boxes, a mode of hot-blast air flowing is changed effectively, so that wind resistance is small; and the relatively-small fan can be selected, electricity is saved, the temperature in the drying boxes is uniform, the drying quality is improved, and energy is saved for a considerable part of heat energy is recovered in discharged damp and hot air.

Description

[0001] Field: [0002] The invention relates to a drying device, especially a hot blast oven drying box with uniform ventilation in the drying box, small temperature difference between the upper and lower sides and the ability to recover a considerable part of heat energy. Background technique: [0003] At present, the known drying equipment for agricultural and sideline products has a structure that drying boxes are arranged on the left and right sides of the hot blast stove. The hot blast stove is a square box with closed sides and an open top. The combustion furnace is placed below the square box. An axial flow fan is installed above the combustion furnace. An air inlet is provided under the partition adjacent to the left and right drying boxes. The air is forced to flow under the action of the fan. After being heated by the combustion furnace, the air enters the bottom of the left and right drying boxes from the above-mentioned air inlet, and is discharged through 15-20 la...

AI Technical Summary

Problems solved by technology

The shortcomings of this technology are that the temperature difference between the upper and lower sides of the drying box is large, the wind resistance of the hot air is large, the flow rate is slow, and the material in the middle is boiled, the drying speed is slow, the drying cycle is long, and the quality of the dried material is poor. high consumption

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