High-airtightness tunnel kiln

Abstract

The invention discloses a high-airtightness tunnel kiln. The high-airtightness tunnel kiln comprises a kiln body composed of kiln walls and a kiln top, and a kiln car composed of a car frame, car wheels and a kiln car lining portion and operating on kiln rails. T-shaped grooves are formed in the side surfaces of the kiln car lining portion and formed along the full length of the kiln car. A plurality of packer bricks are movably inserted into the T-shaped grooves correspondingly and arranged in the length directions of the T-shaped grooves in sequence. Packer grooves are formed in the kiln walls correspondingly, and the external extending ends of the packer bricks are movably arranged in the packer grooves correspondingly. Skirt plates are arranged on the side surfaces of the car frame, sand sealing grooves containing kiln sand are formed in the kiln walls correspondingly, each skirt plate comprises a skirt plate body, the lower lateral side of each skirt plate body is connected with asand sealing inserting portion in a groove shape, the upper portion of each sand sealing inserting portion is connected with a skirt plate brick body, and the sand sealing inserting portions are inserted into the kiln sand. By adopting the high-airtightness tunnel kiln, good sealing isolation protection can be formed for the bottom of the tunnel kiln, heat is effectively prevented from being transmitted to the bottom of the tunnel kiln, and in addition, it can be guaranteed that the kiln car operates in the kiln walls without hindrance.

Description

technical field [0001] The invention relates to an industrial furnace, in particular to a tunnel kiln. Background technique [0002] Tunnel kiln is a modern industrial furnace, which has the advantages of continuous production, short cycle, large output, high quality and high efficiency. The main structure of the tunnel kiln is a tunnel structure with two sides of the kiln wall and the kiln roof. A track for the kiln car is laid on the bottom of the kiln. The products to be fired are loaded on the kiln car. From front to back, it is divided into three areas: preheating, firing and cooling. The combustion equipment is set in the middle of the firing area, and the working temperature in between is usually above 1,000 degrees. The products to be fired are carried into the tunnel kiln one by one in front and back, and pass through the preheating area, firing area and cooling area in turn, and the products made are pushed out of the tunnel kiln one by one. Workflow. The kiln w...

AI Technical Summary

Problems solved by technology

Usually, the sealing and isolation system for the bottom of the tunnel kiln includes a curved sealing structure between the lining part of the kiln car and the kiln wall, and a sand seal between the kiln car skirt plate and the sand sealing groove containing kiln sand set on the kiln wall. Sealing structure; in order to improve the sealing effect between the side of the kiln car lining and the kiln wall, usually the side of the kiln car lining and the opposite kiln wall will be made with corresponding uneven surfaces, forming a so-called curved seal structure. Tortuous and relatively narrow gaps are formed from top to bottom to increase airflow resistance and reduce the flow of high-temperature hot air in the working space of the kiln to the bottom. However, in order to ensure the normal operation of the kiln car, prevent thermal deformation of the kiln car lining and kiln wall bending seal The error of the shape and position of the surface of the structure will bring friction obstacles to the operation of the kiln car, and there will still be a large gap between the lining of the kiln car and the kiln wall of the curved seal structure, which cannot achieve the ideal sealing effect; in conventional sand In the sealing structure, since the skirt plate is made of steel plate, although it can be inserted into the sand sealing groove to block the flow of high-temperature air to the bottom of the kiln car through the kiln sand, the corresponding concave-convex surface between the lining part of the kiln car and the kiln wall The high temperature transmitted from the gap between the skirts will act on the skirts. On the one hand, the skirts may be thermally deformed and affect the sand sealing effect. An increase in temperature will still affect the normal working state of related steel components and cause heat loss, affect the temperature distribution in the kiln, and make it difficult to control the quality of fired products

Therefore, the sealing and isolation structure of the bottom of the tunnel kiln in the conventional tunnel kiln cannot meet the high-quality and efficient production requirements for finished products

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