Annular multi-pipe embedded type cascade steam injection activation kiln device and control method and application thereof

Abstract

An annular multi-pipe embedded type cascade steam injection activation kiln device comprises a kiln body, a kiln head box, a burner, a drive device and a steam injection device. The tail end of the kiln body is connected with and communicates with the kiln head box. The burner is arranged on the side wall of the kiln head box. The drive device is connected with the kiln body and drives the kiln body to rotate. An activation chamber is arranged in the kiln body. The steam injection device comprises a steam conveying header pipe, a steam conveying branch pipe, a steam conveying ring and a steaminjection pipe. The steam conveying ring is arranged on the outer side of the kiln body in a surrounding mode. One end of the steam injection pipe penetrates through the kiln body to communicate withthe activation chamber. The other end of the steam injection pipe is connected with and communicates with the steam conveying ring. The steam conveying ring is connected with and communicates with thesteam conveying header pipe through the steam conveying branch pipe. According to the activation kiln device, steam injection inlets are formed in a kiln body, the number is increased substantially,and steam is injected in a segmental independent-control mode; and the contact specific surface area of materials in the kiln and steam is increased substantially, and thus the activation grade of products is improved effectively.

Description

technical field [0001] The invention relates to an activation kiln device, in particular to an activation kiln device injecting steam, a control method and application thereof, and belongs to the field of construction equipment. Background technique [0002] Rotary kiln, also known as rotary calcining kiln, is a large-scale equipment in the core industry, which is widely used in building materials, metallurgy, chemical industry, environmental protection and other production industries. Its function is to use rotation and internal high temperature to calcine the materials in the kiln to form finished ore. Rotary kiln can be divided into cement kiln, metallurgical chemical kiln and lime kiln according to different materials. Cement kilns are mainly used for calcining cement clinker, which can be divided into two categories: dry production cement kiln and wet production cement kiln. Metallurgical and chemical kilns are mainly used for magnetization roasting of lean iron ore i...

AI Technical Summary

Problems solved by technology

[0006] 1. Insufficient contact between materials and steam: When the activation kiln in the prior art is in production, the steam sprayed into the kiln by the steam pipe at the kiln head box cannot be effectively sprayed to the middle and rear of the kiln, and even at the front of the kiln , the steam can only effectively contact the material on the surface of the kiln, but cannot fully react with the material on the lower layer

This will lead to insufficient contact between the whole material in the kiln and the steam, resulting in low product activation and poor quality;

[0007] 2. The distribution of steam injection volume is unreasonable: the activation kiln under the existing technology has only one steam inlet during production, and it is impossible to realize the cascaded gas distribution formed according to the temperature distribution in the kiln interval

This will lead to a situation where there is too much steam in some places and not enough steam in some places in the kiln, which will adversely affect production.

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