Temperature lifting type molded coal drying kiln

Abstract

The invention discloses a temperature-boost moulded coal drying kiln. The invention adopts a hot air pipe (6) arranged on the internal-lower part of a kiln body (10) for hot air feeding, and the hot air pipe (6) distributes air along an inclined upper direction. An air inducing pipe (1) arranged on the upper part of the kiln gathers air along an inclined lower direction, and the air is exhausted through an air inducing machine and a dust removing device. When the moulded coal enters the kiln body (10) to be contacted with the hot air of the upper part of the kiln, the heat of the hot air is gradually transmitted to the moulded coal to gasify the water in the moulded coal, and the temperature of the moulded coal raises slowly and the moulded coal is dried slowly. When the moulded coal reaches the lower part of the kiln body (10) and contacts the high temperature and wet hot air 4 which just enters the kiln, the moulded coal is gradually dried, the moulded coal has lower humidity, the evaporation of the water in the moulded coal is slower, and the strength of the moulded coal is maintained; furthermore, the temperature rising speed and the drying speed of the moulded coal can be controlled by regulating the air temperature and the speed of the hot air. The invention is especially suitable for manufacturing long flame coal with higher fugitive constituent into moulded coal, and the dried moulded coal has higher cold and heat strength and more uniform drying speed.

Description

technical field [0001] The invention relates to the technical field of briquette drying, in particular to a temperature-raising type briquette drying kiln suitable for long-flame coal with relatively high volatile content. Background technique [0002] At present, in the production process of industrial briquettes, the briquettes need to be dried after being shaped, so that the cold strength and hot strength of the briquettes can be improved and the briquettes can be used. There are two kinds of existing briquette drying kilns: one is a shaft kiln, and the other is a tunnel flap kiln. The temperature inside the tunnel flap kiln is constant, there are many moving equipment in the kiln, the maintenance workload is heavy, the energy consumption and operation cost are high, and the equipment operation safety is not high, so it is rarely used now. Currently used briquette drying vertical kiln such as ZL03216115.8 is equipped with hot air from the upper end, and the lower part is...

AI Technical Summary

Problems solved by technology

The temperature inside the tunnel flap kiln is constant, there are many moving equipment in the kiln, the maintenance workload is heavy, the energy consumption and operation cost are high, and the equipment operation safety is not high, so it is rarely used now.

Currently used briquette drying shaft kilns such as ZL03216115.8 are equipped with hot air from the upper end, and the lower part is equipped with an induced draft fan. As soon as the briquette coal arrives in the kiln, that is, at the outlet of the hot air, it will be heated quickly. At this time, the humidity of the briquette coal is high. The humidity of the hot air is low, and the water in the briquette will evaporate rapidly, which will affect the strength of the briquette, making it difficult to make briquettes with long-flame coal with high volatile content.

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