Kiln

Abstract

The invention provides a kiln which comprises a kiln body and a kiln furniture, wherein the kiln furniture can move in the kiln body and is used for placing objects to be fired; the kiln body comprises a furnace top and a side wall, which form a firing channel; the firing channel comprises a preheating zone, a firing zone and a cooling zone, which are communicated in order; a chimney is arranged on the side wall on the entry side of the preheating zone, and a waste heat channel extending along the direction of the firing channel is formed in the side wall; one end of the waste heat channel is communicated with the cooling zone, and the other end of the waste heat channel is communicated with the chimney; the chimney has extracting force for extracting the waste heat of the cooling zone back to the preheating zone through the waste heat channel for recycling. The kiln has the advantages of high recycling rate of waste heat and small heat loss, reduces noises, reduces electric energy loss, and saves energy.

Description

technical field [0001] The present invention relates to a kiln. Background technique [0002] The kiln is widely used in the roasting production of ceramic products, abrasives and metallurgical industries. The kiln car is made of silicon carbide material. The combustion equipment is located on both sides of the middle of the tunnel kiln, forming a fixed high temperature zone - the firing zone. Cold air is blown into the kiln tail of the kiln to cool the latter section of the kiln. There are heat extraction fans and out-of-furnace pipes on the outside of the wall, and the cooled waste heat is drawn back to the preheating zone through the out-of-furnace pipes for reuse. However, the existing kilns have the following shortcomings: one is This method of waste heat utilization, because the pipeline is set outside the furnace, the waste heat has lost some heat in the process of passing through the pipeline, and the heat that can be reused in the preheating zone is reduced, so the...

AI Technical Summary

Problems solved by technology

[0002] The kiln is widely used in the roasting production of ceramic products, abrasives and metallurgical industries. The structure is divided into a pre-tropical zone, a firing zone, and a cooling zone. There are fixed walls and vaults on both sides and the top, and the rails laid on the bottom run Kiln car, the kiln car is made of silicon carbide material, and the combustion equipment is installed on both sides of the middle part of the tunnel kiln, forming a fixed high-temperature zone - the firing zone, blowing cold air at the kiln tail of the kiln to cool the last section of the kiln The product is provided with a heat extraction fan and an external pipeline on the outside of the wall, and the cooled waste heat is drawn back to the preheating zone through the external pipeline by the exhaust fan for reuse. However, the existing kiln has the following disadvantages. One is In this method of waste heat utilization, since the pipes are arranged outside the furnace, part of the waste heat has lost heat in the process of passing through the pipes, and the heat that can be reused by the preheating zone is reduced, so the heat recovery rate is low and the heat loss is large. Outside the furnace, the noise is louder. Second, the kiln car is made of silicon carbide material, which has a strong heat absorption capacity, which makes the heat loss in the furnace greater, and requires more power consumption to ensure the normal production of the kiln.

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