Coal gangue tunnel kiln preheating section structure

Abstract

The invention discloses a coal gangue tunnel kiln preheating section structure. The structure is characterized in that a kiln body and a kiln car running in the kiln body are included, the kiln body comprises a kiln top, a kiln wall and a work channel, the kiln wall comprises a wall high platform used for being fixed to a foundation, the wall high platform is built through rubble bricks, and the wall high platform is provided with heightened layers formed by pouring concrete; each heightened layer is provided with a first wall layer, a second cavity layer, a cavity heat-isolation heat-preserving layer and a third wall layer which are sequentially arranged from inside to outside; a sand seal groove structure used for sealing bottom space of the kiln car is arranged on the sides, close to the work channel, of the heightened layers. The heat-preserving structure is convenient and quick to construct, has the advantages of saving energy and being environmentally friendly, improves the heat-preserving effect and reduces energy consumption. The sand seal groove structure is reasonable in arrangement, the strength of sand seal grooves is high, and the isolation effect between steel apron boards on the two sides of the kiln car and the sand seal grooves of side walls is good.

Description

technical field [0001] The invention relates to a coal gangue tunnel kiln preheating section structure. Background technique [0002] Tunnel kiln is generally a long linear tunnel with fixed walls and vaults on both sides and top, and kiln cars run on tracks laid at the bottom. The combustion equipment is installed on both sides of the middle part of the tunnel kiln, which constitutes a fixed high-temperature zone - the firing zone. The high-temperature flue gas generated by combustion flows along the tunnel to the kiln head under the action of the chimney at the front end of the tunnel kiln or the induced draft fan. At the same time, the products entering the kiln are gradually preheated, and this section constitutes the preheating zone of the tunnel kiln. The cold air blows into the kiln tail of the tunnel kiln to cool the products in the last section of the tunnel kiln. After the cold air blows in flows through the products and is heated, it is drawn out and sent to the ...

AI Technical Summary

Problems solved by technology

The preheating section of the existing coal gangue tunnel kiln has the following problems in the process of firing refractory materials: the thermal insulation effect of the kiln body is poor, resulting in more energy loss, which affects production costs and product quality; Unreasonable, the sand seal groove cannot be set at a very high height due to strength limitations, resulting in poor partition effect between the steel skirts on both sides of the kiln car and the sand seal groove on the side wall, making it easy for cold air to leak into the kiln and heat The gas is also easy to leak out of the kiln, which affects the production cost and product quality; the thermal insulation structure of the kiln roof is not properly set, which leads to the inability to obtain strong support for the thermal insulation layer of the kiln roof, which limits the thickness of the thermal insulation layer of the kiln roof, and affects the thermal insulation effect

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