A gangue tunnel kiln

Abstract

The invention discloses a gangue tunnel kiln. The gangue tunnel kiln comprises a kiln body which extends along the transverse direction and a kiln car which runs in the kiln body, the kiln body comprises a kiln top, a kiln wall and a service aisle, and the service aisle comprises an inlet section, a pre-heating section, a roasting section, a heat preservation section and a cooling section in sequence in the extension direction. The heat preservation structure of the gangue tunnel kiln is convenient and fast to construct, energy saving and environmental friendly, the heat preservation effect is improved, and the energy consumption is lowered; a sand seal groove is reasonable in structure and high in intensity, the separation effect between steel skirt boards at two sides of the kiln car and the sand seal groove of the side wall is good, the integrative sealing effect is improved, cold air is difficult to leak into the kiln, hot gas is difficult to leak to the outside, the production cost and product quality are guaranteed, the structure is simple and reliable, the cost is low, and the service life is long; the thermal insulation structure at the kiln top is reasonable in design, a thermal insulation layer at the kiln top can be powerfully supported, and the thick thermal insulation layer can be arranged at the kiln top.

Description

Technical field [0001] The invention relates to a coal gangue tunnel kiln. Background technique [0002] The tunnel kiln is generally a long linear tunnel with fixed walls and vaults on both sides and at the top, and a kiln car runs on the track laid at the bottom. The combustion equipment is located on both sides of the middle part of the tunnel kiln, forming a fixed high temperature zone---firing zone. The high-temperature flue gas produced by combustion flows along the tunnel towards the kiln head under the action of the chimney or induced draft fan at the front of the tunnel kiln. At the same time, the products entering the kiln are gradually preheated, and this section constitutes the preheating zone of the tunnel kiln. Cool air is blown into the end of the tunnel kiln to cool the products in the latter section of the tunnel kiln. After the cold air flows through the products and is heated, it is then pumped out and sent to the dryer as the heat source for drying the green ...

AI Technical Summary

Problems solved by technology

[0003] 1) The thermal insulation effect of the kiln body is poor, resulting in more energy loss, which affects production costs and product quality;

[0004] 2) The structure setting of the sand seal groove is unreasonable, and the sand seal groove cannot be set at a high height due to the strength limitation, resulting in poor partition effect between the steel skirt plate on both sides of the kiln car and the sand seal groove of the side wall, making the cold air It is easy to leak into the kiln, and the hot gas is easy to leak out of the kiln, which affects the production cost and product quality;

[0005] 3) The heat insulation structure of the kiln roof is unreasonably set, resulting in the inability of the kiln roof heat insulation layer to be strongly supported, which limits the thickness of the kiln roof heat insulation layer and affects the heat preservation effect

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