Suspension liquid continuous filtration thickening device and continuous filtration thickening method thereof

A kind of suspension and dense technology, which is applied in metallurgy and chemical industry, can solve the problems of unguaranteed filtrate quality, filtrate turbidity, intermittent diafiltration of filter cloth, etc., and achieve the effect of improving dynamic conditions, improving filtrate quality and good filtrate quality

Inactive Publication Date: 2015-10-21
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Another defect of the sedimentation filter tank is that the quality of the filtrate cannot be guaranteed: the compressed air is blown back to desludge, which may easily cause intermittent diafiltration of the filter cloth; if the filter cloth of a filter tube is damaged during operation, the entire filtrate will be turbid

Method used

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  • Suspension liquid continuous filtration thickening device and continuous filtration thickening method thereof

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Effect test

Embodiment 1

[0033] A stone coal vanadium extraction enterprise uses a continuous suspension filter thickening device to process stone coal acid leaching slurry with a solid content of 20%, and the flow rate of stone coal acid leaching slurry is 20m 3 / h. Suspension continuous filtration thickening device adopts Φ1200×1200mm stainless steel filter cartridge, the filter bag is made of polyester cloth with a filtration accuracy of 250 mesh, and the filter medium laid on the filter plate is polyester cloth of 350 mesh. The filtrate obtained by the continuous filtration thickening device of the suspension is clear and transparent, and the solid content is less than 0.01%, which can meet the requirements of the solvent extraction vanadium extraction material liquid. The solid content of the mud discharged from the overflow port reaches 60%, and the mud is washed in series with 5 suspension continuous filter thickening devices. The pH of the washing water obtained by the fifth-stage suspension ...

Embodiment 2

[0035] A barium salt enterprise adopts barite plus carbon reduction roasting, calcine is immersed in water, and the leaching liquid is passed through CO 2 The process of precipitating barium produces barium carbonate. Since the calcine leaching solution is a nearly saturated BaS solution, the concentration of BaS in it is 220g / L-240g / L, BaS will crystallize and precipitate when the temperature of the leaching solution (85-90°C) is slightly lowered, and polysulfides are easily formed when the leaching solution contacts with air. . Therefore, traditional filtration equipment cannot be used for liquid-solid separation after calcined sand leaching, and the supernatant can only be passed through CO directly after heat preservation and clarification. 2 Shen barium. But because the supernatant contains a certain amount of suspended solids, the produced barium carbonate grade is only about 98%. The company switched to a suspension continuous filtration thickening device, and after ...

Embodiment 3

[0037] The water supply workshop of an enterprise takes river water with a sediment content of 2-3% as raw water, and uses a fiberglass suspension continuous filter thickening device with a filter cartridge of Φ1600×1600mm to prepare industrial water with a solid content of 3 / h, the recovery rate of water reaches 93.6%.

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Abstract

The invention discloses a suspension liquid continuous filtration thickening device and a continuous filtration thickening method thereof which are suitable for industries including metallurgy, chemical engineering and the like. The filtration and thickening of suspension liquid are concentrated into the specially-designed continuous filtration thickening device of the suspension liquid, the function of mechanical stirring is fully used, the automatic clearance of mud on the surface of a filter bag is achieved, therefore, the dynamic condition of the liquid penetrating through the filter bag is effectively improved, and the speed of the liquid penetrating through the filter bag is greatly improved. The liquid penetrating through the filter bag is infiltrated naturally through a filter cloth, so that the quality of filtrate is greatly improved. The suspension liquid continuous filtration thickening device is compact in structure, high in operation efficiency, good in quality of the filtrate, simple and convenient to operate and suitable for large-scale industrial production of suspension liquid solid-liquid separation.

Description

technical field [0001] The invention relates to a suspension continuous filtration thickening device and a continuous filtration thickening method thereof, belonging to the fields of metallurgy and chemical industry. Background technique [0002] Thickening and filtering of suspensions are common processes in metallurgical and chemical processes. Suspensions are different from ordinary liquids and have some special properties. When the diameter of solid particles is greater than 0.1 μm, the suspension is unstable, especially when the difference between the liquid phase density and the solid phase density is large, due to the action of gravity, the solid particles will form Sedimentation is separated from the liquid, and this separation method is called gravity sedimentation in industry. Gravity settling is suitable for handling suspensions with relatively large solid-liquid density difference, low solid content, and relatively large processing capacity. [0003] Gravity se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D36/04
Inventor 王学文王明玉
Owner CENT SOUTH UNIV
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