Plate- og rammefilterpressen , as a classic type of plate filter press (composed of filter plates and filter frames alternately arranged to form a filter chamber), has long occupied an important position in the field of solid-liquid separation due to its unique structural design and filtration principle.
Dens fordeler gjenspeiles hovedsakelig i følgende aspekter:
1. høy filtreringsnøyaktighet, fullstendig separasjon av fast og væske
Filterkammerstrukturen har sterk lufttetthet og utmerket retensjonseffekt. The filter plate and filter frame of the plate and frame filter press are tightly pressed through the hydraulic system to form an independent closed filter chamber. When the material is filtered through the filter cloth under pressure, the solid particles are strictly trapped in the filter chamber, and the liquid is discharged through the gap of the filter cloth. This structure has a rejection rate of more than 98% for fine particles (such as pigments, dyes, catalysts) and colloidal materials, and the filtrate has high clarity (turbidity is usually less than 10NTU), far exceeding some continuous filtration equipment (such as rotary drum filters).
Høytrykksfiltrering er egnet for materialer med høy viskositet. The filtration pressure can be stably maintained at 0.6-1 MPa, which can effectively handle materials with high viscosity and high solid content (20% -60%) (such as chemical sludge, starch residue, food processing waste residue). Sammenlignet med beltefilterpressen er dens filtreringseffektivitet for ikke-flytende eller lett komprimerbare materialer høyere, og det er ikke lett å forårsake problemer med "rennende materiale" eller ufullstendig filtrering.
2. filterkaken har lavt fuktighetsinnhold og lave kostnader for oppfølgingsbehandling
The filter chamber of the plate and frame filter press is formed by the filter plate and the filter frame to form a fixed volume space. Etter hvert som filtreringen fortsetter, blir filterkaken i filterkammeret gradvis fylt og komprimert. With the "extrusion dehydration" action under high pressure, the moisture content of the filter cake can be as low as 15% -30% (depending on the material characteristics).
For eksempel:
The water content of municipal sludge can be reduced from more than 95% to less than 30% after being filtered by plate and frame, and the volume can be reduced by more than 70%, which greatly reduces the cost of transportation, landfill or incineration.
After the mine tailings are pressed and filtered, the filter cake can be directly used as a building backfill material without secondary drying.
3. Enkel og holdbar struktur, lave vedlikeholdskostnader
Fewer core components, low failure rate, mainly composed of filter plate, filter frame, filter cloth, hydraulic system and frame, no complex rotating or transmission parts (such as centrifugal filter drum, belt filter press roller), daily wear is concentrated in filter cloth and sealing gasket, easy to replace and low cost (filter cloth can be selected according to the material polyester, polypropylene and other materials, the unit price is much lower enn de presisjonsmekaniske delene).
Strong material adaptability and long service life. Reinforced polypropylene (PP), cast iron, stainless steel and other materials can be selected for filter plates and frames:
PP-materiale syre- og alkaliresistens, lett vekt, egnet for kjemisk beskyttelse, miljøvern og andre korrosive forhold;
Stainless steel/cast iron has high strength and can withstand high pressure and high temperature materials (such as high temperature slurry filtration), with a service life of up to 5-10 years.
4. Fleksibel drift som kan tilpasses krav i flere scenarier
Intermitterende drift er praktisk for prosesskontroll. The intermittent process of "feed → filtration → pressure holding → cake unloading" is adopted, and the separation effect can be optimized by adjusting the filtration time and pressure parameters. It is especially suitable for small batch and multi-variety material processing (such as filtration after fine chemical batch reaction, laboratory small test or pilot test). During production, it can be flexibly started and stopped according to the material characteristics to avoid the efficiency decline caused by continuous equipment due to feed fluctuations.
Specifications can be customized, from small to large full coverage, filter plate size from 320mm × 320mm (laboratory use) to 2000mm × 2000mm (industrial large equipment), filter area can be expanded from 0.5 square meters to more than 1000 square meters, both to meet the low production demand of small workshops, but also to tilpasse seg storskala produksjon av store fabrikker (som metallurgi, gruvedrift 10.000 tonn fast-væske separasjonslinje).
Høy filtratoppsamlingshastighet og utmerket ressursutnyttelsesgrad
Den lukkede filterkammerdesignen til plate- og rammefilterpressen kan redusere avfallet av filtratet. For the filtrate containing high-value components (such as solvents in chemical reactions and juices in food processing), it can be efficiently recycled and reused to reduce the loss of raw materials. For eksempel: i den farmasøytiske industrien kan plate- og rammefilterpressen gjenvinne de aktive ingrediensene i gjæringsvæsken og forbedre produktutbyttet; i fargestoffindustrien kan gjenværende fargestoffer i filtratet gjenvinnes for å redusere utslippsforurensning.
Plate- og rammefilterpressen tar høy filtreringsnøyaktighet, lavt filterkakefuktighetsinnhold, slitesterk struktur og enkelt vedlikehold som sine kjernefordeler. It is especially suitable for processing high viscosity, high solid content, fine particles or materials that need to be strictly intercepted. Det er mye brukt i miljøvern, kjemisk industri, mat, gruvedrift, farmasøytiske og andre felt. Although it is a batch equipment, its advantages in separation effect and cost control make it still the preferred filtration equipment for many industrial scenarios.
