Filters continuous

Despite their theoreticaUy poor washing performance, due to uneven wash distribution and excessive mn-off because the filter surface is not horizontal, many multicompartment dmm filters continue to be used as cake washing filters. Effective washing of the filter cloth can be done only with the belt discharge type, where the cloth leaves the dmm for a brief period and can thus be washed on both sides. 

Continuous Cake Filters Continuous cake filters are apphcable when cake formation is fairly rapid, as in situations in which slurry flow is greater than about 5 L/min (1 to 2 gal/min), shiny concentration is greater than 1 percent, and particles are greater than 0.5 [Lm in diameter. Liquid viscosity below 0.1 Pa s (100 cP) is usually required for maintaining rapid liquid flow through the cake. Some designs of continuous filters can compromise some of these guidelines by sacrificial use of filter aid when the cake is not the desired product. 

Insoluble suspended matter either picked up from the atmosphere or formed by deposition and corrosion within the system, together with slimes will, if not removed, cause blocking and abrasion problems. The build-up of such material can be controlled by side stream filtration, in which about 2-5 per cent of the circulating water flow is filtered continuously. A sand filter is commonly used for this type of duty. 

Compression drug coatings, 78 707-708 Compression filters, continuous, 77 379-381... 

Once the proper pH is reached, the slurry can be filtered continuously via a rotary vacuum filtration. A clear KF filtrate can be fed directly to the AQUATECH cell stack. The collected cake is a valuable byproduct. For this case the precipitate is a titanium dioxide which is easily upgraded via washing, drying, grinding and purification to the high value pigment grade Ti0-- Even in the raw form, this byproduct will draw credits of up to 30 /T. 

Until now, bioreactors of various types have been developed. These include loop-fluidized bed [14], spin filter, continuously stirred turbine, hollow fiber, stirred tank, airlift, rotating drum, and photo bioreactors [1]. Bioreactor modifications include the substitution of a marine impeller in place of a flat-bladed turbine, and the use of a single, large, flat paddle or blade, and a newly designed membrane stirrer for bubble-free aeration [13, 15-18]. Kim et al. [19] developed a hybrid reactor with a cell-lift impeller and a sintered stainless steel sparger for Thalictrum rugosum cell cultures, and cell densities of up to 31 g L1 were obtained by perfusion without any problems with mixing or loss of cell viability the specific berberine productivity was comparable to that in shake flasks. Su and Humphrey [20] conducted a perfusion cultivation in a stirred tank bio-... 

Procedures to run an SDI test call for a 0.45-micron filter pad to be placed with the shiny side up in the filter holder. A small squirt of water from a water bottle is used to wet and completely seat the filter pad. (If the pad shows signs of air bubbles or erratic coverage of foulant of the pad upon removal from the filter holder, the filter was not seated properly and the SDI test is invalid). The isolation valve is opened and the pressure regulator is set to 30 psi. The time it takes to collect 500 ml of water through the 0.45-micron filter pad is then recorded. After this volume of water has been collected, water is allowed to run through the filter continuously for a total time of 15 minutes. If necessary, the pressure should be adjusted to remain at 30 psi. At the end of 15 minutes, the time it takes to collect another... 

Centrifugal filters. Continuous solid bowl. Price does not include motor and drive. 

While the designs of commercially available crystallizer cells have some variances, all are intended to cool and agitate the oil as a batch more or less in the same manner. There are, however, several types of filters in use based on the products and style of operation. These basic designs include plate and frame filters, continuous vacuum systems, membrane systems, and pressure leaf designs. 

Vorious pressure filters — Continuous drum Botch leof Botch ptote Botch tubulor element Botch cartridge Batch plote ond frame... 

Vacuum Filters, Continuous Type.— Vacuum leaf filters which dipped into a tank or basin of the material to be filtered were the predecessors in point of time of the continuous rotating vacuum filters of today, practically the only type of continuous vacuum filter which exists today. The old leaf type of vacuum filter was intermittent in operation and one of two sets of operations were necessary with them (omitting for brevity the washing operations). In one set the leaves were stationary and after the tank or basin was filled suction was applied and a cake of the proper thickness accumulated. It was then necessary to run off the balance of the material in the tank or basin, reverse the air current and blow off and wash out the cake which had accumulated. After this was done fresh material was allowed to enter and the cycle of operations was repeated- In the other set of operations and better from a mechanical point of view the filter leaves with their accumulated cake were removed by machinery and after the cake was dropped the leaves could be returned to the tank for further solid accunaulation. 

Various pressure filters — Continuous drum Botch leaf Botch ptote Botch tubular element Batch cortridge Botch plote ond frome... 

Batch, semi-batch vacuum filters Continuous vacuum filters Batch, semi-batch pressure filters Continuous pressure filters Compression filters Filtering centrifuges Precoat filters... 

TRANSMISSION OF WRATTEN FILTERS (Continued) FILTER DATA... 

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