Step type kiln

Abstract

A furnace is characterized in that the material with a certain thickness is positioned on a multi-layer ladder-shaped pallet; the material descends from top to bottom and layer by layer, while the fire and the smoke gradually go upward from bottom to top above the material so as to evenly heat the material. By sequentially pushing the material, shaking or overturning the pallet, the operator enables the material on the multi-layer ladder-shaped pallet to go downward layer by layer. When the operator plans to shake or push the material to make the material descend from the multi-layer ladder-shaped pallet, the operator can incline the multi-layer pallet with material at a certain angle, so that the material can smoothly and evenly fall off from the multi-layer ladder-shaped pallet layer by layer to prevent the material layer being arched. A fuel spray gun is arranged at the lowest layer, or the fuel spray guns can be arranged on the remaining layers to effectively control the temperature of each layer. A continuous transporter or equipment can be used to deliver the material after processing out of the kiln. The multi-layer pallet can be drawn out and replaced in the kiln. The ladder-shaped furnace can be used to melt certain materials and a melting pool is arranged at the bottom layer of the furnace.

Description

Technical field [0001] What the present invention relates to is a kind of kiln. Background technique [0002] At present, the kilns that are widely used for material calcination and decomposition in industrial production are mainly shaft kilns and rotary kilns. [0003] The working principle of the shaft kiln is: above the furnace grate, materials and fuel (coal) are alternately stacked in layers from top to bottom, and the fire and smoke are burned from bottom to top and then emptied. The existing problems are: a. The fuel will pollute the material; b. Because the fire and smoke often cannot pass through the material layer evenly, the material will be over-burned or under-burned, thereby affecting the product quality. [0004] The working principle of the rotary kiln is: make the material roll down from high to low in the long cylinder that is tilted and rotated. The fuel spray gun is set at the discharge end of the material, and the fire and smoke run against the material...

AI Technical Summary

Problems solved by technology

The existing problems are: a. The fuel will pollute the material; b. Because the fire and smoke often cannot pass through the material layer evenly, the material will be over-burned or under-burned, which will affect the product quality.

Its disadvantages are: a. high manufacturing and maintenance costs; b. large floor area; c. limited by its own structure, cost and working principle, it is difficult to make very long, which affects production efficiency and the quality of some products Quality; d, unable to control the temperature curve arbitrarily and precisely

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