Hazardous waste burning rotary kiln

Abstract

The invention discloses a hazardous waste burning rotary kiln. The hazardous waste burning rotary kiln comprises a feeding device, a pushing device, a rotary kiln cylinder, a seal device, a kiln headash bucket, a secondary combustion chamber, a bearing device and a drive device; one end of the pushing device extends into one side of a kiln head of the rotary kiln cylinder, the side, extending into the rotary kiln cylinder, of the pushing device is higher than the other side, the lower portion of the feeding device is communicated with the side wall of the upper portion of a material cylinderof the pushing device, the rotary kiln cylinder is axially and horizontally arranged, a refractory material layer is arranged on the inner wall of the rotary kiln cylinder in an attached manner, and the thickness of the refractory material layer is evenly increased in the axial direction from kiln tail to kiln head. Through the technical scheme, the wear condition of the bearing device and the drive device below the rotary kiln cylinder can be avoided, the rotary kiln cylinder is not prone to sliding in the moving direction of materials, meanwhile, black smoke and tempering phenomena of the kiln head can be avoided, a burning system continuously and stably runs, and safety and reliability of the burning system can be ensured.

Description

technical field [0001] The invention relates to the technical field of incineration equipment, in particular to a hazardous waste incineration rotary kiln. Background technique [0002] Hazardous waste incineration rotary kiln originated from the main thermal equipment of alumina plant, cement plant and other metallurgical and chemical plants. Since the device was introduced into China, it has gradually become the main equipment for the harmless disposal of hazardous waste, and has been widely used in the industry. Due to the long length of the rotary kiln, in order to realize the continuous forward movement of the material during the calcination process in the rotary kiln, a certain slope is often imposed on the cylinder in the prior art, which will cause the tugboat and the driving device at the bottom of the cylinder to move forward continuously. Axial force is generated on the surface, which aggravates the wear of the contact surface. In addition, the inclination of th...

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Problems solved by technology

Due to the long length of the rotary kiln, in order to realize the continuous forward movement of the material during the calcination process in the rotary kiln, a certain slope is often imposed on the cylinder in the prior art, which will cause the tugboat and the driving device at the bottom of the cylinder to move forward continuously. Axial force is generated on the surface, which aggravates the wear of the contact surface

In addition, the inclination of the cylinder causes the material at the kiln head to be higher than the kiln tail. When the rotary kiln has positive pressure in a short period of time, it will cause the internal high-temperature flue gas to overflow, and there will be thick smoke and tempering. In severe cases, it will cause A fire in the material pit burns out the entire feeding system and affects the safety of the incineration system

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