A rotary kiln system with tail heat drying and induced draft fan without dust accumulation

Abstract

The invention discloses a rotary kiln system capable of utilizing residual heat for stoving and with no dirt retention on an induced draft fan. A rotary kiln is arranged in an inclined manner; a burner is arranged in the rotary kiln; the high end of the rotary kiln and one end of a dryer are connected with an air hose in a bidirectional manner through a discharging pipe; a conveyer belt is arranged in the dryer and is connected with the discharging pipe; a star discharger is arranged at the other end of the dryer; a bulged refractory slab is arranged in the rotary kiln; the induced draft fan for dust removal has the structure of wedge-shaped blades and a dished backboard. According to the invention, the bulged refractory slab increases the heat transfer area of the rotary kiln, promotes stirring of a material, and facilitates improvement of thermal efficiency; the dryer utilizes residual heat to facilitate forming and drying of a globular material; residual heat utilization and heat preservation consequent reaction of hot material have the remarkable energy-saving characteristic; a quenching liquid pool rapidly cools a pellet material, and plenty of water is evaporated through reaction, so that the environmental protection pressure caused by expansion of producing fluid is effectively relieved; the induced draft fan does not accumulate dirt to completely eradicate a safety accident; the rotary kiln system is particularly suitable for burning processing of vanadium ore and is broad in application prospect.

Description

technical field [0001] The invention relates to a rotary kiln, in particular to a rotary kiln system with tail heat drying and no dust accumulation in an induced draft fan. Background technique [0002] Due to its strong adaptability, low operating cost and high reliability, the rotary kiln is one of the main preferred equipment for mineral batching, pelletizing, reaction and drying, and is especially suitable for the processing and burning of vanadium ore. During the working process, the rotary kiln needs to consume fuel to maintain a suitable high temperature in the kiln. Therefore, the exhaust gas discharged from the rotary kiln contains a lot of heat energy and dust. It is necessary to purify the exhaust gas and recover the exhaust heat to achieve energy saving and emission reduction. [0003] The rotary kiln is generally cylindrical, so the heat transfer area between the material and the kiln body is very small, resulting in low thermal efficiency. [0004] The fan is ...

AI Technical Summary

Problems solved by technology

Once some hardened dust is shaken off by vibration, it will immediately leave the dynamic rotation balance of the fan, and then generate strong vibration, which may cause serious personnel and equipment safety accidents

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