Rotary kiln

Abstract

The invention discloses a rotary kiln, comprising a rotary kiln main body used for stirring raw materials fed to the interior, and injected with gas; and a main support unit connected to rotate the rotary kiln main body, and possessing a changeable sealing portion correspondingly changing with the rotary path of the rotary kiln main body.

Description

technical field [0001] The present invention relates to a converter, in particular to a converter used in lime and cement manufacture, reduction of various metals and waste treatment. Background technique [0002] In general, a rotary kiln is a device used in the production of lime and cement, the reduction of various metals, and waste treatment. It heats the raw material to a set temperature and then causes a reaction with the injected gas. Equipment used for processing raw materials (reduction or incineration, etc.). [0003] Briefly explaining the structure of this type of converter, it is a device that rotates the converter main body that is installed slightly inclined with respect to the horizontal direction, and injects raw materials into the inclined converter main body through the upper slope, and is installed on The heater of the main body of the converter heats the input raw materials, then injects atmospheric gas through the gas pipe to process the raw materials ...

AI Technical Summary

Problems solved by technology

[0005] However, for the converter, there will be a gap between the rotating part which is the main body of the converter and the support fixing part which is connected to such a converter main body and provides support. During the conversion of the main body of the converter, the problem that the atmosphere gas leaks to the outside of the main body of the converter occurs, and the outside air flows into the inside of the main body of the converter to form an undesired state of the atmosphere, which causes a problem

[0006] As an example, the case of a nickel reduction furnace is described. In this case, an agglomerated powder raw material containing nickel is charged into the main body of the converter, and hydrogen gas is supplied into the main body of the converter in order to perform a reduction reaction. At this time, if external air flows into the inside of the converter, Then, as the internal hydrogen comes into contact with the external air, the risk of explosion becomes very high, and the internal hydrogen leaks to the outside, causing losses.

[0007] According to the process, various gases such as oxygen, argon, and nitrogen can be selected as the atmosphere gas according to the purpose. If oxygen is used, the introduction of oxygen has a greater risk of explosion, and if argon or nitrogen is used Inert gas, although the risk of explosion is lower, but there is a problem of increased gas consumption

[0008] Furthermore, when the waste is burned, toxic gas will be generated inside the main body of the converter. If this toxic gas leaks, it will not only corrode the surrounding equipment, but also emit a toxic smell, thereby polluting the surrounding environment.

[0009] In particular, for the main body of the converter, when the heater is activated to heat the raw material, high-temperature deformation gradually occurs over time, so that the The damage of the sealing part occurs due to the increase of the increase, and there is a limitation that the seal cannot be achieved due to the gap with the sealing part

[0010] That is, if figure 1 As shown, in the converter according to the prior art, the sealing is realized by the sealing block 30 (the sealing member 40 is attached to the corresponding surface between the converter main body 10), and the sealing block 30 is fixed to the converter main body 10 as the rotating part. Between the fixed frame 20 as a fixed part, such as figure 2 and image 3 As shown, when the converter is deformed at high temperature and rotates, it does not rotate around the center line of rotation C but rotates sideways. Since the center line of rotation C is used as a reference, it is sideways and inclined to one side and the other side, so The problem of damage to the sealing member 40 will occur on the side where the weight is placed close to the side of the seal block 30 , while a gap will be formed on the other side where the weight is not placed, resulting in the leakage of atmospheric gas and the inflow of outside air.

Images