Rotary kiln

Abstract

The invention discloses a rotary kiln which comprises a kiln head, a kiln body, a kiln tail, rim bands, riding wheels, a big gear ring, a transmission device and a foundation. The riding wheels are arranged on the foundation through bearings, the rim bands penetrate through the kiln body in a sleeved mode and are fixedly connected to the kiln body, and the kiln body is arranged on the riding wheels through the rim bands. The big gear ring penetrates through the kiln body in a sleeved mode and fixed on the kiln body, the transmission device is arranged on the foundation, and an output end of the transmission device is in gear mesh with the big gear ring. A lifting board is arranged in the kiln body, and a kiln head cover is arranged on the kiln head. The kiln head is provided with an activated sludge feed device and a combustible waste feed device. The lifting board is an O-shaped hanging chain which is arranged on the inner wall of the kiln body. A sealing structure between the kiln head and the kiln body is in a labyrinth seal mode and a scale seal mode. The sealing structure between the kiln tail and the kiln body is in a labyrinth seal mode and a scale seal mode. A smoke outlet is formed above the kiln head cover, and a temperature measuring device is arranged on the smoke outlet. The rotary kiln is used for drying PTA process activated sludge, the combustion is sufficient, burning effects are good, sludge drying efficacy is good, energy is saved, and sealing performance is good.

Description

technical field [0001] The invention discloses a rotary kiln, which belongs to the technical field of garbage incineration equipment. Background technique [0002] A large amount of activated sludge produced during the treatment of terephthalic acid (PTA) production wastewater has always been a difficult problem in environmental protection work. A large amount of activated sludge is produced in the process of PTA process wastewater treatment. The sludge contains a large amount of cobalt, manganese heavy metals and organic compounds and inorganic compounds. , because activated sludge contains a lot of water, a lot of heat energy is required in the drying process, and at the same time, due to high water content, poor fluidity, and difficult treatment, fluidized bed incinerators; pyrolysis incinerators; multi-layer bed incineration The rotary kiln is difficult to realize, and the rotary kiln rotates slowly and has the characteristics of large throughput, which can realize the ...

AI Technical Summary

Problems solved by technology

The sealing system often adopts labyrinth seal, split ring circumferential seal or semi-flexible seal, and the sealing effect is not ideal

The total mass of the rotary kiln body is relatively heavy, and the resistance of the material is relatively large when starting, so it must be equipped with a high-power motor to start. After starting, the high-power motor will continue to run with the kiln body’s inertia, resulting in energy waste.

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