Bauxite slurry dehydrator chooses Lvding, it is worthy of your reliance

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Belt filter press
Mud press

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Equipment applicable scope
(Textile printing and dyeing, electroplating, papermaking, printing and dyeing sludge, electroplating sludge, papermaking sludge, textile activated sludge, leather brewing, food processing, leather sludge, brewery, biochemical pollution Mud mining, drilling and brewing sludge, food sludge, petrochemical industry, chemical industry, metallurgy, ceramics, chemical industry sludge, urban sewage, chemical fiber air flotation sewage, alkali production, salt mud, warm process smelting sludge, electrolytic manganese dioxide, iron pyrite mine sludge, carbide slag sludge Cement plant sludge, coal washing plant slime, steel plant tail sludge, steel plant converter sludge, steel plant blast furnace sludge, river sludge, aluminum plant sludge and other industries have different characteristics of sludge.
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Working Principle
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(Sludge with a solid content of a few thousandths and a certain concentration of flocculant are fully mixed in a static mixer. After the tiny solid particles in the sludge agglomerate into The larger floc clumps are separated from free water at the same time and transported to the concentration section of the machine. Under the action of gravity, the free water is separated to form stagnant sludge, which is then clamped between the upper and lower mesh belts and enters the machine. The dehydration section passes through the wedge-shaped low-pressure zone and high-pressure zone, and further squeezes the sludge under the action of small to large squeezing forces to achieve the purpose of dehydration. Finally, the sludge is separated from the water to form a filter cake and is discharged for convenient storage and transportation.
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.Chemical pretreatment and dehydration
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(In order to improve the dehydration of sludge, improve the properties of the filter cake, and increase the permeability of the material, it is necessary to chemically treat the sludge. This machine uses a unique water flocculation and granulation mixer device to achieve the effect of chemical flocculation. This method not only has good flocculation effect, but also saves a lot of operating costs and low economic benefits.
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.Gravity concentration and dehydration section
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(The sludge is evenly sent to the mesh belt through the distribution hopper. The sludge moves forward with the filter belt. The free water flows through the filter belt into the water receiving tank under the action of its own weight. Gravity dehydration also It can be said that the main function of the highly concentrated section is to remove free water in the sludge to reduce the fluidity of the sludge in preparation for further extrusion.
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. Wedge zone pre-pressure dehydration section
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(The fluidity of the sludge after gravity dehydration is almost completely lost. As the filter belt of the belt filter press moves forward, the distance between the upper and lower filter belts gradually decreases. The material begins to be subject to slight pressure and as the filter belt operates, the pressure The function of gradually increasing the wedge-shaped area is to extend the gravity dehydration time and increase the extrusion stability of the floc in preparation for entering the pressure area.
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. High-pressure dehydration section of the squeeze roller
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(The material enters the pressure zone after leaving the wedge zone. The material is squeezed in this zone along the running direction of the filter belt. The pressure increases with the decrease in the diameter of the squeeze roller. The material is squeezed and the volume shrinks. The gap in the material is free. When the water is squeezed out, the filter cake is basically formed and continues forward to the high-pressure area at the end of the pressure. After passing the high pressure, the water content of the filter cake can be reduced to the minimum. After the material is dehydrated in each of the above stages, it forms a filter cake and is discharged. The upper and lower filter belts are scraped off by a scraper and separated. The trace materials between the filter holes are removed by high-pressure flushing water and continue to the next step of the dehydration cycle. For different types of sludge, different flocculants and their dosages should be used, as well as different numbers of squeeze rollers, different squeeze methods, and different structures of filter belts, speed and tension changes to achieve a more scientific, reasonable, economical and applicable treatment effect. . Therefore, to achieve better dehydration results, a reasonable process flow must be designed.
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