Rotary kiln air supply device

Abstract

The invention discloses a rotary kiln air supply device, aiming to provide a rotary kiln air supply device that is adaptive to expansion and contraction of the cylinder of the rotary kiln and radial runout caused by rotation of the cylinder. The rotary kiln air supply device comprises a cylinder of the rotary kiln, an air inlet hole arranged on the cylinder of the rotary kiln, an air blower and a blast tube connected with the air blower at one end. The rotary kiln air supply device further comprises a circuit air supply cylinder connected with the blast tube at the other end and rotatably winding out of the air inlet hole of the cylinder of the rotary kiln relative to the air inlet hole of the cylinder of the rotary kiln, an air inlet hole hermetically winded on the cylinder of the rotary kiln and two sliding sealing rings rotating relative to the cylinder of the rotary kiln at both sides of the air supply cylinder and a stretchable flexible connecting piece hermetically connecting the air supply cylinder and the sliding rings on the cylinder of the rotary kiln. The rotary kiln air supply device provided by the invention can be used to various rotary kilns such as a molybdenum concentrate self-heating roasting rotary kiln and the like.

Description

technical field [0001] The invention relates to a rotary kiln, in particular to an air supply device for a rotary kiln. Background technique [0002] Due to the characteristics of continuous production, large capacity, relatively low production cost, and easy operation and control, rotary kiln is the most widely used roasting and calcination equipment at home and abroad. At present, about 96% of all molybdenum sulfide concentrates used at home and abroad must first be converted into industrial molybdenum oxide through roasting. The most widely used roasting equipment in my country is the rotary kiln. In the rotary kiln roasting molybdenum concentrate process, the most advanced technology is the self-heating roasting of molybdenum concentrate proposed in the Chinese patent application number 201010237892.9, the invention name is self-heating roasting method of molybdenum concentrate and its device Method and device thereof. This process utilizes a rotary kiln equipped with ...

AI Technical Summary

Problems solved by technology

In this process, the air supply method of the heat exchanger of the rotary kiln body is to fix the blower on the shell of the rotary kiln, and use a slip ring power supply device to supply power to the blower. The air supply pipe is rigidly connected to the rotary kiln shell, making it difficult to adapt to the thermal expansion and contraction of the rotary kiln shell and the radial runout caused by the rotation of the shell, resulting in very concentrated stress on the shell at the air supply device and making the The refractory material of the cylinder is easy to fall off, which is also one of the main reasons for the shutdown accident of the rotary kiln

In addition, due to the limited space on the shell of the rotary kiln, it cannot meet the requirements of the straight pipe sections of the first ten and the last five of the flow detection instrument. It is difficult to install the flow detection device and the electric adjustment device, which brings inconvenience to the detection of the air supply flow and the automatic control of the roasting process of the rotary kiln

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