A tunnel kiln with a sand-sealed structure

Abstract

The invention discloses a tunnel kiln with a sand sealing structure. The tunnel kiln with the sand sealing structure is characterized in that the tunnel kiln with the sand sealing structure comprises a kiln body extending horizontally and a kiln car driving in the kiln body. The kiln body comprises a kiln crown, a kiln wall and a working channel. A preheating section is provided with a sand throwing pipe. An elevating layer of an entrance section is provided with a fourth front wall body layer built by laying light firebricks. The sand throwing pipe is askew inserted into the fourth front wall layer. The outer end of the sand throwing pipe is hinged to a cover plate for the sand throwing plate on the sand throwing plate. One sides, close to the working channel, of the elevating layers on the entrance section, the preheating section, a sintering section, an insulating section and a cooling section are provided with a sand sealing groove structure for sealing the bottom space of the kiln car. The sand sealing groove comprises angel steels which are embedded in the elevating layer. According to the tunnel kiln with the sand sealing structure, sand is thrown through the sand throwing pipe, sandy soil in the sand sealing groove can be added at any time during the producing process, the arrangement of the sand sealing groove is reasonable, the rigidity of the sand sealing groove is comparatively high, the separating effect between steel apron boards at the two sides of the kiln car and the sand sealing groove is good, and the whole sealing effect is good.

Description

technical field [0001] The invention relates to a tunnel kiln with a sand-sealed 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 dryer as a h...

AI Technical Summary

Problems solved by technology

[0003] 1) The sand in the sand seal tank is continuously lost during the production process, and it is inconvenient to manually enter the kiln to add sand, and the efficiency of sand addition is low;

[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

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