Cement kiln power material scattering device and cement kiln with same

Abstract

The invention provides a cement kiln power material scattering device and a cement kiln with the same and relates to the field of cement kiln equipment. The problems that in the prior art, materials are preheated unevenly, and direct material falling is likely to happen are solved. The power material scattering device comprises a material scattering box, an opening is formed in the front side of the material scattering box, and a discharging port is formed in the upper portion of the material scattering box. Two sets of material scattering discs with power devices are installed on the inner side of the material scattering box, and the two sets of material scattering discs are oppositely distributed in a left-right mode, can revolve around the central axes, are located below the dischargingport of the material scattering box to be used for receiving material and can scatter the materials towards the opening of the material scattering box. The cement kiln adopts the power material scattering device, high heat exchange efficiency between materials and hot gas is achieved, and the material direct-falling problem can be avoided, materials can be scattered very evenly and well cover high-temperature gas flow, fully mixing and contact of low-temperature materials and high-temperature gas can be achieved, and thus the heat exchange efficiency of the system can be greatly improved.

Description

technical field [0001] The invention relates to the field of cement kiln equipment, in particular to a power spreading device for a cement kiln and a cement kiln using the power spreading device. Background technique [0002] At present, in the world's most common new-type dry-process external decomposition cement kiln, the material preheating and decomposition system composed of multi-stage cyclone and decomposition furnace is widely used for rapid preheating and decomposition of low-temperature materials, and the flow direction of materials is: Low-temperature material feeding point—first-stage cyclone—second-stage cyclone—third-stage cyclone—fourth-stage cyclone—calciner—fifth-stage cyclone—rotary kiln, where the flow direction of high-temperature gas is: rotary kiln + third air duct — Calciner — fifth-stage cyclone — fourth-stage cyclone — third-stage cyclone — second-stage cyclone — first-stage cyclone — discharge preheater system. [0003] The spreading devices used i...

AI Technical Summary

Problems solved by technology

However, the material flow control ability of this kind of material spreading device is poor, and there is no effective control on the material. The material is completely dispersed by natural flow and splashing. It is difficult to ensure that the material is fully and evenly dispersed and fully contacted with the hot air to exchange heat. Inhomogeneous mixing with high temperature gas leads to low heat transfer efficiency of the system

[0004] In addition, due to the fast downstroke speed and strong downstroke force of the strands of materials under the action of gravity, it is difficult to suspend all the materials by the high-temperature gas, so some materials often collapse directly, and the so-called "material" "short circuit", causing the problem that the entire cement kiln system cannot be produced normally

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