How to choose the most suitable centrifuge

2022-08-24
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How to choose a suitable centrifuge

users choose a suitable centrifuge according to the use occasion, material properties and other factors, so as to achieve the desired purpose. There are three problems that must be paid attention to when selecting the type:

1 corrosion resistance: the materials separated by the centrifuge are generally corrosive to a certain extent, and the materials in contact with the materials must meet the requirements of corrosion resistance to ensure safe use

the material types of structural parts (303. The model of the equipment can be roughly divided into digital display and microcomputer controlled 4, 321, 316L, titanium plate), the materials of sealing rings and gaskets, the treatment measures for large surface of surface financing gap (plastic lining, rubber lining, surface coating), and the material of filter cloth should be determined during model selection. The manufacturer can be informed of the properties of materials (chemical properties, temperature during separation, etc.) during model selection, so that the manufacturer can put forward suggestions on the selection of centrifuge materials according to the characteristics of the separated medium, and indicate them in the order to ensure the anti-corrosion requirements of the centrifuge

2 explosion proof performance: if the materials (or environment) processed by the centrifuge contain flammable and explosive substances such as organic solvents, the centrifuge should have explosion-proof performance. The explosion-proof performance depends on the explosion-proof requirements (grade) of the process. In the previous explosion-proof occasions, it was only proposed to configure explosion-proof motors. In the past two years, nitrogen protection requirements have been put forward for the occasions where the materials processed contain organic solvents such as solvents. In fact, in order to realize the real explosion-proof of centrifuge, many measures should be taken in the aspects of machinery, electric control, accessory configuration, etc., such as: electric control system: explosion-proof barrier, non-contact energy consumption braking system, electrostatic grounding, explosion-proof automatic control

mechanical system: explosion-proof motor, explosion-proof lighting, anti-collision measures, anti-static transmission ----- Professor Chen xiazong of Zhongyuan University/Vice President/Chairman belt

explosion proof accessories: nitrogen protection device, nitrogen detection, on-site explosion-proof control button

therefore, for occasions with explosion-proof requirements, users should specify the separated medium, explosion-proof requirements and grade, configure corresponding devices and take appropriate measures to meet the explosion-proof requirements when ordering

3 separation performance

separation performance is the most basic function, including separation effect, washing effect, processing capacity, degree of automation, etc. At the beginning of ordering, it is difficult to accurately determine the final separation effect because of the differences in material properties, including material viscosity, particle size, density, solid-liquid ratio of slurry and other factors. Generally, the separation factor of centrifuge is used to measure the separation effect of centrifuge

the separation factor is related to the rotating speed and diameter of the drum, and is squared with the angular velocity of the drum

Ft= ω R2/g

where: ft is the separation factor ω For the drum angular velocity, r/sr is the drum diameter, MMG is the gravitational acceleration

the washing mentioned here refers to the washing of the filter cake. For some materials, the filter cake needs to be washed with washing liquid, and some even need to be washed several times to meet the requirements, which requires the configuration of washing pipes. Washing effect and washing time have a great influence on the aperture, layout position and structural form of washing pipe

the processing capacity of centrifuge is related to the physical and chemical properties of materials and separation requirements. It is generally estimated by the number of cycles in an hour and the weight of filter cake in a single operation

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