JPS582584A - Rotary kiln - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary kiln equipped with a high-pressure water injection nozzle for removing deposits adhering to the inner wall of the kiln body.

In rotary kilns, which perform firing by rotating a refractory cylinder and blowing flame from one side, during operation, combustion ash from the materials to be fired and fuel such as fine powder may adhere to the inner wall of the kiln body. .

These deposits occur in roughly the same location.

If these adhere, major operational problems will occur, such as the raw material not moving forward smoothly when feeding the raw material.

It takes longer time and more effort to remove these deposits than in the past.

The present invention has been made to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide a rotary kiln that can easily remove deposits on the inner wall of a kiln body.

In the present invention, in order to achieve the above object, nozzle insertion tubes are arranged radially through the fireproof wall in the kiln main body, and high-pressure water injection nozzles are installed in these nozzle insertion tubes so that they can be inserted and removed. A new structure was adopted.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

The figures illustrate one embodiment of the invention.

In this figure, what is indicated by the reference numeral 1 is the kiln main body 1.

A refractory brick layer 2 is formed on the inner cylindrical surface of the kiln body 1. Then, at a predetermined position in the axial direction of the kiln body 1, that is, a position where deposits are likely to be generated, a plurality of nozzle insertion pipes 6 are inserted through the refractory brick layer 2 and arranged radially at equal angular intervals in the circumferential direction. It is provided. These nozzle insertion tubes 3 are closed by a lid (not shown) except when removing deposits.

These nozzle insertion tubes 3 are provided in several rows as shown in FIG.

Moreover, what is indicated by the reference numeral 4 is a deposit formed by the combustion ash of a fuel such as a composite molten product or pulverized coal adhering to the refractory bricks 1@2 on the inner circumference of the kiln body 1.

A high pressure water injection nozzle 5 is inserted into the deposit 4 through the nozzle insertion pipe 3.

At this point, the effects of this embodiment configured as described above will be explained.

If the rotary kiln is operated and deposits 4 are generated on the inner circumference of the kiln body 1, open the lid of the nozzle insertion tube filter, and while the operation is stopped, insert the high-pressure water injection nozzle 5 into the nozzle insertion tube filter. and feed it into the deposit 4. Then, high-pressure water is jetted into the deposit 4 using a predetermined pressure, for example, 80 to 150 to 9/-, resulting in temperature shock and water hammer force.

The deposit 4 is forcibly peeled off.

It is convenient if one high-pressure water injection nozzle 5 is provided for each nozzle insertion tube B, but it is not necessarily necessary to provide one high-pressure water injection nozzle 5 for each nozzle insertion tube B.

Using several high-pressure water injection nozzles 5, each nozzle insertion tube 6
The deposits 4 may be peeled off by sequentially inserting them into the wafers.

As is clear from the above description, according to the present invention, a plurality of nozzle insertion tubes are arranged radially through the fireproof wall at locations where adhesion occurs, and high-pressure water injection nozzles can be freely inserted and removed into these nozzle insertion tubes. By adopting a built-in structure, it is possible to reliably remove the deposits generated by using temperature shock and water hammer, simplifying the removal work and allowing efficient kiln operation. It can produce excellent results.

[Brief explanation of drawings]

The drawings illustrate one embodiment of the invention. Figure 1 is a vertical cross-sectional view of the kill/main body, Figure 2 is A-A in Figure 1.
, A sectional view, and FIG. 6 are sectional views illustrating the state of removing deposits. 1 is a kiln main body, 2 is a fireproof wall, 3 is a nozzle insertion tube, 4 is a deposit, and 5 is a high-pressure water injection nozzle. Patent applicant: Ube Industries Co., Ltd. No./II

Claims (1)

[Claims] In a rotary kiln, which performs firing by rotating the kiln body and blowing flame from one side and feeding the raw material to be fired from the other side, it is expected that materials to be fired, fuel, or foreign matter such as ash may adhere to the inner wall of the kiln body. Nozzle insertion tubes are arranged radially through the fireproof wall of the kiln body at the locations where
A rotary kiln characterized in that a high-pressure water injection nozzle is provided in these nozzle insertion tubes so that it can be inserted into and removed from the inside of the kiln main body.