Roller kiln

Abstract

The invention discloses a roller kiln. The roller kiln comprises a furnace body with a hearth, wherein a conveying device and a heating device are installed in the hearth; and the hearth is internallyprovided with a temperature regulating air inlet device, and the air outlet speed at the middle of the hearth is larger than the air outlet speed of the two sides of the hearth. The roller kiln can control the temperature uniformity in the width direction of the hearth, and has the advantages of being simple and convenient to control, good in control effect, simple in structure, low in cost, easyto transform and implement and the like.

Description

technical field [0001] The invention relates to the technical field of heat treatment kiln equipment, in particular to a roller kiln. Background technique [0002] For the electric heating roller kiln, the heating elements pass through the furnace horizontally from the upper and lower respectively, and the material and the roller for placing the material are placed between the upper and lower heating elements. From the temperature difference of the furnace section, the temperature difference between the upper and lower can be adjusted The power of the upper and lower heating elements can be adjusted, but since the heating element passes through the furnace horizontally, the temperature difference in the width direction is not very effective. Therefore, it is difficult to effectively adjust the temperature uniformity in the width direction because of the temperature field control of the existing roller kiln. shortcoming. [0003] Since the heat on both sides of the furnace w...

AI Technical Summary

Problems solved by technology

[0002] For the electric heating roller kiln, the heating elements pass through the furnace horizontally from the upper and lower respectively, and the material and the roller for placing the material are placed between the upper and lower heating elements. From the temperature difference of the furnace section, the temperature difference between the upper and lower can be adjusted The power of the upper and lower heating elements can be adjusted, but since the heating element passes through the furnace horizontally, the temperature difference in the width direction is not very effective. Therefore, it is difficult to effectively adjust the temperature uniformity in the width direction because of the temperature field control of the existing roller kiln. shortcoming

[0003] Since the heat on both sides of the furnace will diffuse to the outside, the temperature distribution of the furnace cross-section in the width direction of the furnace will show the characteristics of high in the middle and low on both sides, resulting in a temperature difference in the width direction of the furnace.

When the furnace size of the roller kiln is small, the temperature difference in the width direction of the furnace is not very obvious, but with the increase of the furnace width, the temperature difference in the width direction of the furnace will also increase, which seriously affects the quality of heat treatment products

In order to reduce the temperature difference in the width direction of the furnace, the current practice is to add side insulation structures on both sides of the roller kiln to reduce radiation heat dissipation on both sides, thereby alleviating the temperature difference in the width direction of the furnace, but this method has little effect , it is difficult to meet the heat treatment requirements of battery materials and other materials with high temperature sensitivity, resulting in poor sintering consistency and low yield

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