A coal gangue tunnel kiln for producing refractory materials

Abstract

The invention discloses a coal gangue tunnel kiln for producing refractory materials. The coal gangue tunnel kiln comprises a kiln body extending in the transverse direction and a kiln vehicle traveling in the kiln body. The kiln body comprises a kiln top, a kiln wall and a working channel. The working channel sequentially comprises an inlet section, a preheating section, a roasting section, a heat preserving section and a cooling section in the extending direction. The preheating section is provided with a fume extractor. The roasting section is provided with a coal throwing structure for throwing coal gangue. The coal throwing structure comprises a coal throwing pipe penetrating through the kiln top from the position above the kiln top to be communicated with the working channel. The coal throwing pipe comprises an upper coal throwing pipe and a lower coal throwing pipe. According to the coal gangue tunnel kiln, a plurality of exhaust pipelines are arranged for centralized smoke exhausting, so the negative pressure of the kiln head is not too large, the problems existing in an existing structure are solved, the curve of the temperature in the kiln is adjusted, and the quality of finished products in the kiln is guaranteed; a partition plate is arranged, and the flowing effect in the kiln is reduced; the upper coal throwing pipe and the lower coal throwing pipe can be arranged in sequence, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to a gangue tunnel kiln for producing refractory materials. 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

[0003] 1) The design of the smoke exhaust structure of the existing tunnel kiln is unreasonable, resulting in the inability to achieve a more reasonable temperature adjustment and pressure adjustment effect, which affects the quality of the finished product in the kiln;

[0004] 2) The design of the coal feeding structure is unreasonable, and the whole pipe is usually used for coal feeding, which has certain construction difficulties during layered construction;

[0005] 3) The high-temperature flue gas generated by combustion is gradually preheating the products entering the kiln. This process cannot be automatically controlled, and the temperature and pressure are often controlled by the experience of the operating workers, so scientific production management cannot be carried out;

[0006] 4) The design of the blower device in the cooling section is unreasonable, resulting in insufficient air supply in the kiln, which affects the cooling efficiency

Images