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2022

The GW-type external-filter vacuum rotary drum filter is a solid–liquid separation device independently developed by our company.

　　The GW-type external-filter vacuum rotary drum filter is a solid–liquid separation device independently developed by our company. It features a compact structure, advanced performance, fully automated and continuous operation, stepless speed regulation, and convenient use and maintenance. Additionally, it can be equipped with a spray‑washing system to rinse the filtered solids. This equipment is primarily used in industries such as chemical processing and mining for the dewatering, washing, and concentration of materials with fine particle sizes and high viscosities.
Working principle
　　The GW-type external-filter press is a solid–liquid separation device that employs scraper discharge. During filtration, under vacuum suction, the filtrate passes through the filter cloth, the filtration chamber, and the filter tubes, converging at the distribution valve and being discharged via the vapor–water separator, while solid particles are retained on the surface of the filter cloth to form a filter cake. Once the filter cake is lifted above the liquid level, it sequentially enters the washing zone, the dewatering zone, and the discharge zone. In the discharge zone, the filter cake is blown off by reverse air jets and removed by a scraper, thereby completing one filtration cycle. The process then resumes with fresh slurry, initiating the next operational cycle.
Application areas
　　● Filtration and dewatering of various fermentation biomass
　　● Filtration and dewatering of wastewater and sludge in the petrochemical and mining industries
　　● Filtration and dewatering of wastewater and sludge in the pigment industry
　　● Filtration and dewatering of aluminum oxide slurry
　　● Washing and Dewatering of Polymers in the Acrylic Fiber Industry
　　● The clarification process in sugar production from low-protein materials such as rice
　　● Separation of citric acid fermentation residue
　　● Dehydration of heavy alkali
Product Features
　　● Personalized design to meet the diverse needs of our customers.
　　● The air back-blowing system has been improved, enhancing the dryness of the discharged material.
　　● Advanced structure, reliable performance
　　● The Lu model employs a flat‑contact distribution valve, offering excellent sealing and high vacuum levels.
　　● Easy to maintain, low failure rate, and long service life