The design structure and operation of the high-speed disperser This article is a question from the author of Fu Dongmei's "Operation and Design Analysis of Dispersing Machine", which mainly describes the high-speed dispersing electromechanical conduction in the paper industry from the wetting operation and dispersion operation of high-speed dispersing machine. The role played by the rate meter. Shelf Baseplate Roll Forming Line Roll Forming Equipment,Baseplate Roll Forming Line,Shelf Baseplate Roll Forming Line,Shelf Roll Forming Line Xinxiang Tianfeng Machinery Manufacture Co., Ltd. , https://www.frollforming.de
The high-speed disperser has been widely used in the production of heavy calcium carbonate for papermaking. Its operation and design are correct or not, which directly affects the dispersion effect. The productivity of a high speed disperser depends on the ability to wet dry calcium carbonate, the ability to disperse large particles of calcium carbonate, and the ability to recycle calcium carbonate slurry. These three capabilities are often interrelated and independent of one another, so balance these three factors to design and select the dispersed impeller. The bending tester of the calcium carbonate slurry has a good wetting effect in the eddy current state; in the laminar flow state, the dispersion is good. Therefore, the high-speed dispersion operation should be divided into two steps: first wetting operation, then post-dispersing operation.
Wetting operation of the high-speed disperser At this time, the impeller stirring shaft is placed in the center of the tank, and the impeller height and the rotational speed should be adjusted so that the slurry is centered on the shaft to form a vortex. The vortex of the material should not be lower than the impeller, otherwise it will mix in the air and reduce the dispersion efficiency.
The dry powdered calcium carbonate is directly added to the vortex, and is added by a quick and slow agitator. Be careful not to add it to the shaft and the tank wall. In order to maintain the material vortex, the viscosity of the slurry increases correspondingly with the material, and it is preferable to intermittently Increase the position of the impeller and increase the speed. With low speed feeding, dust can be significantly reduced.
The dispersing operation of the high-speed disperser should be carried out at a high speed. After adding a little powder of calcium carbonate for a few minutes, when there is no dry powder floating on the surface of the slurry, the stirring shaft is biased between the tank and the side of the tank to improve the dispersion efficiency and eliminate the dead angle. . Axis offset
However, the energy consumption will increase, but the dispersion efficiency can be increased by 25% to 50%. Another purpose of the shaft offset is to prevent the slurry from moving as a viscous circle to avoid poor slurry circulation and high material temperature rise. And mix in the air.
The rotational speed of the impeller is generally recommended to be a wire speed of 20 to 60 m/s. Whether the material can be recycled is very important for the good dispersion of the good bending tester. Even with the same speed, the small impeller is inferior to the large impeller because the circulation is not complete, the external material cannot be recycled to the impeller dispersion area, and the impeller is enlarged. The diameter improves the circulation of the material. This can also be achieved by reducing the viscosity of the slurry.
For product information about the disperser, please refer to: http://wwwDisperser.nbchao.com/list77/
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Design structure and operation of high speed disperser