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| Application of centrifuge polyphenylene sulfide waste salt recovery |
Date:2016/12/12 Hits:876 |
Recovery of waste salt from polyphenylene sulfide by centrifugal separation equipment
1, material properties
In the production process of PPS, after the polycondensation reaction is finished, the solid phase is washed, the liquid solution is evaporated after the solvent is extracted and evaporated, and the by-product inorganic salt sodium chloride is obtained by crystallization.
Complex ingredients, including sodium chloride, ash, low phenolic materials, solvents, etc..
High solid content, high viscosity, high temperature, 80-100 C (generally 80, 90 degrees)
After condensing the material caking and high hardness.
Wide range of particle size distribution.
2, current separation equipment overview and problems
At present, the siphon scraper centrifuge is used to separate the coarse particle material, and the separating liquid containing fine particles is separated by a LW horizontal decanter centrifuge.
Due to the material viscosity, condensation and caking materials with high hardness, filter blockage, cleaning and regeneration is difficult. Siphon centrifuge can only be used as sedimentation centrifuge.
Failed to play siphon scraper centrifuge capability.
High energy consumption, large footprint, high maintenance costs.
Automatic discontinuous work, high labor cost.
Complex installation, high installation costs.
3, the advantages of the centrifuge
According to the material properties, recommend the use of short Drum Helical discharging sedimentation centrifuge (mud dewatering centrifuge) + clarifying decanter, coarse particles were isolated, fine particulate material.
Two models are not filter, to avoid the risk of filter clogging.
Low energy consumption, small footprint, low maintenance costs.
Automatic continuous work, low labor cost.
Simple installation, low installation cost.
Centrifuge for PPS desalting section of the sodium chloride in full speed continuous feeding, dehydration and discharging, sealing operation, processing capacity, stable performance, low energy consumption, good separation effect. The utility model overcomes the defects of intermittent operation and small production capacity of the existing separation equipment, saves investment and simplifies operation. |
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