A device and method for preventing sticky material on the inner wall of a dispersing machine

Abstract

A device for preventing sticky material on the inner wall of a disperser, the device includes a disperser cavity, a pre-drying chamber, a feeding channel, a hot flue gas channel, a feeder, a flue gas outlet, an air cannon and a disperser; the pre-drying The cavity and the flue gas outlet are arranged side by side at the top of the disperser cavity, and the flue gas outlet is used to output the flue gas and dry the dispersed materials; the feeding channel and the hot flue gas channel are arranged side by side at the upper end of the pre-drying chamber, and the feeding channel Located in the middle of the two hot flue gas channels, the feeder is set on the upper end of the feeding channel; the air cannon is set on the inner wall of the disperser cavity; the disperser is set on the inner wall of the pre-drying cavity. The method is: the hot flue gas and the material enter the pre-drying chamber at the same time, the material is pre-dispersed by the disperser, and the material is pre-dried by the hot flue gas; the pre-dispersed and dried material directly falls into the disperser chamber The body is further broken up and dried, and the air cannon is used to remove the material accumulated on the inner wall of the machine cavity; the dried material is output through the flue gas outlet.

Description

technical field [0001] The invention belongs to the technical field of powder drying, in particular to a device and method for preventing sticky material on the inner wall of a dispersing machine. Background technique [0002] In the preparation process of magnesium oxide suspension roasting, it is necessary to dry the high-humidity and high-viscosity magnesium carbonate ore powder first, and the dried magnesium carbonate powder can only be calcined in the main furnace to produce finished products after multi-stage preheating. When the wet and high-viscosity magnesium carbonate ore powder is dried, the magnesium carbonate ore powder will be dispersed by a mixer, and the high-moisture magnesium carbonate ore powder will be thrown by the high-speed rotating hammer after entering the cavity of the mixer. To the inner wall of the disperser cavity, some magnesium carbonate ore powder will adhere to the inner wall of the disperser cavity, and after a long period of accumulation, i...

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Problems solved by technology

[0002] In the preparation process of magnesium oxide suspension roasting, it is necessary to dry the high-humidity and high-viscosity magnesium carbonate ore powder first, and the dried magnesium carbonate powder can only be calcined in the main furnace to produce finished products after multi-stage preheating. When the wet and high-viscosity magnesium carbonate ore powder is dried, the magnesium carbonate ore powder will be dispersed by a mixer, and the high-moisture magnesium carbonate ore powder will be thrown by the high-speed rotating hammer after entering the cavity of the mixer. To the inner wall of the disperser cavity, some magnesium carbonate ore powder will adhere to the inner wall of the disperser cavity, and after a long period of accumulation, it will become thicker and thicker until the accumulated magnesium carbonate ore powder collapses due to its own weight. The magnesium carbonate ore powder that collapses and falls from time to time will enter the chamber of the breaker again to participate in the breakup, resulting in a substantial increase in the amount of material output from the exit of the breaker, which will cause large fluctuations in the pressure and oxygen content of the roaster system, thus Affect the quality of the product, in severe cases, it may lead to shutdown of the furnace

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