Drum filters have an operating flexibility to handle either dewatering, washing, or. A common nondisposable device used for solidliquid phase separation for continuous flow processing is the rotary drum filtration unit. This is for the filtration of magnesium hydroxide slurry coming from thickenerclarifier. They provide economical, durable and sustainable solutions for solids separation, thickening, solids washing, solids demoisturing or classification. For a rotary drum vacuum filter, the test apparatus is an inverted filter leaf which mimics the operational cycle. The inner belt, called the transporter belt, is a heavy rubber belt with raised ribs across its width. A vacuum pump is attached to the conical flask and is used to create a constant vacuum pressure inside the flask. Faivre drum filters 2400 litressecondes 38 000 gpm duration. Design procedure for outsidedrum rotary vacuum filter. Key aspects of the design and operation of the filters that make rotary drums a viable choice for dewatering are presented.
Achieve exceptionally high filtration rates and excellent washing characteristics. Westechs continuous rotary vacuum drum filters provide a wide range of liquidsolids separation for many types of industrial processing flow sheets. Based on energy consideration, reliability, and dewatering capability, the precoated vacuum drum filter, suction filter, and belt filter were recommended. Aries rotary drum vacuum filters r vdfs can be custom designed to meet unique application requirements. A hose cuff slips inside the fitting on the filter cover. Rotary vacuum filter equipment capacity details in sugar industry. Pilot plant equipment center for crops utilization research. They offer the operating flexibility to handle dewatering, washing and clarification applications, or a combination of the two.
Continuous vacuum drum filters are custom designed for broadest range of slurries. Together, these popular disc filters allow you to cover the widest possible range of applications in vacuum disc filtration. Get the most out of your exair reversible drum vac by upgrading to the premium reversible drum vac system. The drum filter has a drive with a variable speed that rotates the drum at cycle times that normally range from 1 to 10 mpr. Along with everything offered by the deluxe reversible drum vac, the premium system includes a 5, 30, 55, or 110 gallon drum with matching lid and lock ring as well as 20 6. The rotary vacuum drum filter belongs to the bottom feed group and is one of the oldest filters applied to the chemical process industry. Bokela filter technologies for solidliquidseparation bokela. A rotary vacuum filter consists of a large rotating drum covered by a cloth.
Oct 25, 2012 rotary drum vacuum filter design posted in student. For the purposes of rough calculations it is usual to assume a capacity of 1,000 lb. In our paper we are going to bring down the moisture content of the given slurries up to. Conventional wisdom is that production of wallboardgrade fgd gypsum requires the use of horizontal belt vacuum filters for dewatering service, to limit cake. Stardisc unites two vacuum disc filter designs that have made a name for themselves in different industries and many applications. Therefore rotary vacuum drum filters are certainly used in to the best part of solid liquid separation process. The given service characteristics are based on a continuous operation, in the optimum separated solids washing process, and in a broad particle size range application. Aries rvdfs are selfcontained systems designed to provide continuous solids dewatering. The advantages of the yu vacuum drum filter, formerly bird young filter, lie in thin cake applications, where highest filtration rates are combined with high. A rotary vacuum filter drum consists of a drum rotating in a tub of liquid to be filtered. The capacity of a vacuum rotary drum filter varies from about 200 to 2,000 lb. Vacuum drum filters are the most frequently used continuous rotary filters in solidliquid separation.
Rather than applying a vacuum inside the compartments of the drum, the pressure inside the housing is raised by compressed. Rotary vacuum drum filter precoat filter alar corp. The drum filter, which is designed specifically to your application, is sized for the most efficient use of space and power. The main driving force for the filtrate flow is then the difference between the atmospheric pressure and the pressure in the flask. Design procedure for outside drum rotary vacuum filter. Both the vacuum belt filter and the vacuum drum filter are appropriate to operate in a huge diversity of applications, processes and industries. In fact, the rotary drum vacuum filter is considered to be the workhorse of the chemical process industry. The filtration rate is based upon square footage, because the filter if flattened is square. Anver drum filters are specially designed for use with vacuum tube lift systems but are suitable for many other applications.
It can be used in process applications where the solid is the product or where the liquid is the product and sometimes when both phases are the product. The timing of vacuum or blow depends on the bridge setting of the main valve. The rotary pressure drum filter is similar in principle and basic form to the rotary vacuum drum filter see section 1. June the application of a horizontal vacuum belt filter smuts. Rotary drum filters are of allmetal construction, including cast filter segments. From gastight to pressure belt designs, living up to the latest atex requirements, they can. This filter combines vacuum filtration with cake compression to deliver a much drier cake than can be obtained with conventional vacuum drum filter. Blower and heat requirements of rotary vacuum filter dryers, chem. The figure 1, shows the basic structure of the rotary vacuum drum filters and also its. Design of rotary vacuum drum filter theory of separation rotary. The precoated filter can also be used for harvesting of tiny microalgae like scenedesmus 36.
As the drum rotates, partially submerged in a slurry, the vacuum pulls air and liquid through the filter cloth located on the exterior of the drum. Each segment consists of a correctly machined metal casting. Andritz separation kraussmaffei tsf vacuum drum filter. Rotary drum vacuum filter mechanical project topics. A costeffective, onsite solution for wastewater processing. Design of rotary vacuum drum filter theory of separation rotary vacuum drum filter rvdf is one of the oldest filters used in the industrial liquidsolids separation.
It is required to find the throughput of a rotary vacuum filter of 20 m 2 surface area with a standard angle. Rotary vacuum drum filter filtration chemistry scribd. Rotary drum vacuum filter mechanical and automobile ieee project topics, thermal engineering base paper ideas, synopsis, abstract, report, figures, full pdf, working details for mechanical engineering me, diploma, btech, be, mtech and msc college students. It comprises a rotating, bottomfed drum of area up to 120 m 2 enclosed within a sealed housing. Pdf models of rotary vacuum drum and disc filters for flocculated. Rotary vacuum drum filter rvdf, patented in 1872, is one of the oldest filters used in the industrial liquidsolids separation. It is used where a continuous separation of a solid from a liquid stream is desired. It offers a wide range of industrial processing flow sheets and provides a flexible application of dewatering, washing andor clarification. Models for rotary drum and disc filtration of compressible suspensions are devel oped using onedimensional compressional rheology theory. The rotary drum vacuum filter is a very versatile liquidsolid separation device. The goal is to avoid formation of a thick layer of cake by continuously shaving it off. Cpe has manufactured drum filters for a range of industry sectors including mineral processing, chemical, pharmaceutical, food and beverage.
In our paper w e are going to bring down the moisture content of the given slurries up to. The drums are constructed of very heavygauge material to withstand the high vacuum levels typical with a vacuum system. Rotary vacuum drum filter free download as powerpoint presentation. General description the horizontal vacuum belt filter hbf consists of two end less belts, one running inside the other. In addition, the precoat drum is always subject to vacuum there is no dead zone. Vacuum nozzles installed in the drum chamber continually clean the drum filter media and the particulate removed from the filter is recycled to the manufacturing process or sent to a waste container. Eimcokcp vacuum filtration rotary vacuum drum filters by. Scraper discharge is the most common drum filter discharge. Eimcokcp rotary vacuum drum filters by the eimcokcp ltd. The main difference is that the scraper blade is stationary on a conventional drum filter, but slowly moving on the precoat filter. After dewatering, the cake is removed from the filter cloth by a scraper blade just prior to the re. An explanation of the filter leaf test procedure is covered in the filtration services ltd document. The nonprecoated vacuum drum filter was ineffective and unreliable due to a clogging problem.
Rotary drum filter the most common type of continuous vacuum filter is the rotary drum filter in which liquor is sucked through a moving septum to deposit a cake of solids. It is particularly suited for filtration of pigment slurries, thixotropic and fibrous slurries and those with a tendency to crack during filtration, or containing elastic or porous substances. Pdf models of rotary vacuum drum and disc filters for. Typical applications include wastewater treatment and the processing of chemicals, cosmetics, foods, pharmaceuticals and minerals. Westech drum filters are available with drums up to. The compartments are divided with grooved division strips along the drum face and around the circumference of the drum heads. Aries rotary drum vacuum filters rvdfs are designed for a wide range of liquid solids separation. Autovac sizing rotary vacuum drum precoat filter drum sizes are determined not by how much water is going to the autovac filter, but by how fast the volume flows through the autovac filter media. Vacuum drum filter yu the advantages of the vacuum drum filter yu, formerly the bird young rotary filter, lie in thin cake applications, where highest filtration rates are combined with high washing rates, highest solids throughput rates, and all this also under gastight conditions. Introduction this paper will introduce the reader to the idea of using rotary drum vacuum filters rdvfs to. Models of rotary vacuum drum and disc filters for flocculated suspensions.
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