Disks types

The axial filter (Oak Ridge National Laboratory) (30) is remarkably similar to the dynamic filter in that both the rotating filter element and the outer shell are also cylindrical. An ultrafiltration module based on the same principle has also been described (31). Unlike the disk-type European dynamic filters described above, the cylindrical element models are not so suitable for scale-up because they utilize the space inside the pressure vessel poorly. 

The American version of the dynamic filter, known as the Artisan continuous filter (Fig. 30), uses such nonfiltering rotors in the form of turbine-type elements. The cylindrical vessel is divided into a series of disk-type compartments, each housing one rotor, and the stationary surfaces are covered with filter cloth. The feed is pumped in at one end of the vessel, forced to pass through the compartments in series, and discharged as a thick paste at the other end. At low rotor speeds the cake thickness is controlled by the clearance between the scraper and the filter medium on the stationary plate, while at higher speeds part of the cake is swept away and only a thin layer remains and acts as the actual medium. 

Processing Chip Screen Rejects. Overlong chips are usually reprocessed in a smaller version of the disk-type roundwood chipper. Overthick chips are reprocessed in a chip sheer. The product from these reprocessing operations returns to the main chip flow ahead of the screens (see Eig. 10). The fines are sent to a hog boiler as fuel, or else rescreened. Pin chips are metered back into the main chip flow or sent to a fine-particle pulping system. 

The Nametre Rotary B rotational viscometer measures torque in terms of the current needed to drive the d-c motor at a given speed while a material is under test. The standard sensors are coaxial cylinders or Brookfield disk-type spindles, but a cone—plate system is also available. The viscosity range for the coaxial cylinder sensors is 5 to 5 x 1(T mPa-s, and the maximum shear rate is 200. ... 

Disk-type soHd bowl machines are batch, batch automatic, and continuous. The soHds are removed ia many different ways, but are usually wet. 

Fig. 15. (a) A clarifier and (b) a purifier of the paring disk-type design, where intermittent discharges of sohds are designated by -... 

Fig. 7. Section of disk-type cell where 1, is the cell cup 2, is the bottom insert 3, is the separator 4, is the negatwe electrode 5, is the positive electrode 6, is the nickel whe gauze 7, is the sealing washer 8, is the contact spring and 9, is the cell cover.

Pressure thrust, which is the product of the effective thrust area times the maximum pressure to which the joint will be subjected during normal operation. (For shp joints the effective thrust area shall be computed by using the outside diameter of the pipe. For corrugated, omega, or disk-type joints, the effective thrust area shall be that area recommended by the joint manufacturer. If this information is unobtainable, the effective area shall be computed by using the maximum inside diameter of the expansion-joint bellows.)... 

Boermaand Lankester [Chem. E/ig. Sci., 23, 799 (1968)] have measured the surface aeration of a six-bladed disk-type turbine (note A well-designed pitched-blade turbine will give equal or better perfor-... 

Flooding of Agitator Impellers A review of impeller flooding has been done by Sensei et al. [AlChE Symp. Series No. 283, 89 (1993)] and they have offered the following flooding correlation for a six-bladed disk-type turbine. 

Gas Holdttp in Agitated Vessels Sensei et al. (op. cit.) have also developed the following correlation for six-bladed disk-type impellers ... 

The Morehouse mill (Morehouse Industries, Inc.) is a high-speed disk type of mill (Fig. 20-53). The undispersed phase is fed at the top and passes between converging disks, being thrown outward at the periphery. 

For conducting tests in pipe lines of 75-mm (3-in) diameter or larger, a spool holder as shown in Fig. 28-21, which employs the same disk-type specimens used on the standard spool holder, has been used. This frame is so designed that it may be placed in a pipe line in any position without permitting the disk specimens to touch the wall of the pipe. As with the strip-type holder, this assembly does not materially interfere with the fluid through the pipe and permits the study of corrosion effects prevailing in the pipe line. 

One variation of the disk-type bowl centrifuge is the nozzle centrifuge, so named because nozzles are arranged on the periphery or on the bottom of the bowl in a... 

Blowdown pressure The value of deereasing inlet statie pressure at whieh no further diseharge is deteeted at the outlet of a safety relief valve of the resilient disk type after the valve has been subjeeted to a pressure equal to or above the popping pressure. 

This type consists of a propeller or disk-type wheel within a mounting-ring panel or cage. The wheel or housing is constructed from either sheet metal, cast aluminium, plastic, or plastic-coated material. It may be a direct drive with the wheel on the motor shaft or belt driven. 

The thickness of one material for manufacture of a disk, along with the specific disk type, is the key factor in establishing at what pressure range a disk of a specified... 

Only a rough description of this micro reactor was given (Figure 5.10), not disclosing all details [20]. A pair of iron plates coated with Pd catalyst is inserted in disk-type holders. Such a supported micro channel device is encased in a housing. 

The micro reactor consisted of a pair of iron plates coated with Pd catalyst placed on disk-type polypropylene holders [20]. This micro channel device was encased in a stainless-steel housing. The thickness of the catalyst layer was approximately 5.0 pm 10 mg catalyst was deposited per plate, so giving 20 mg in total. The specific surface area of the catalyst was 3.6 0.4 m g ... 

The wax deposition behaviors of Bombay high crude oil have been studied under different conditions using a cold disk-type assembly [769]. It is observed that the deposition occurs much less with additive-treated crude than with... 

KB Shah, LL Augsburger, K Marshall. Multiple tamping effects on drug dissolution from capsules filled on a dosing-disk type automatic capsule filling machine. J Pharm Sci 76 639-645, 1987. 

Figure 157. Disk-type heat flux DSC (picture Universitat de Lleida)...

The creation of nanostructured surfaces is one thing, the study of electrochemical reactions on such nanostructures is another one. Especially in electrocatalysis, where size effects on reactivity are often discussed, there have been attempts to use the tip of an STM as a detector electrode for reaction products from, say, catalytically active metal nanoclusters [84]. Flowever, such ring-disk-type approaches are questionable,... 

Figure 12.1 Scheme of a disk-type heat flux differential scanning calorimeter. A cell B furnace C temperature sensors S sample R reference. 

Patel et al. showed that a Bruggeman exponent of 1.5 is often not valid for real separator materials, which do not have uniform spherical shape.Porous networks based on other morphologies such as oblate (disk-type) ellipsoids or lameller increase the tortuous path for ionic conductivity and result either in a significant increase of the exponent a, or in a complete deviation from the power law. They showed that spherical or slightly prolate ellipsoidal pores should be preferred for separators, as they lead to higher ionic conductivity separators. 

In this case, there are too few macroradicals available for reaction because of insufficient polymer degradation. In the disk-type extruder, a higher-stress gradient is achievable, more macroradicals are generated, and intensive cross-linking between polyethylene or highly chlorinated polyethylene and maleic anhydride or methyl methacrylate can be obtained (Heinicke 1984, Zhao et al. 2002, 2003). 

A contemporary of the method just described is the use of an absorbent (e.g. C-18) bonded onto granular or disk-type supports (solid-phase extraction [5]). The granular material is used in cartridge form (typically less than 5 ml), while disk forms are placed in a funnel/holder such as shown in Fig. 18.1b. A liquid (e.g. water, milk, or juice) would be passed through the cartridge (or filter disk), the analytes absorbed in the stationary matrix, the absorbent washed with water, and then the analytes of interest eluted from the absorbent with an organic solvent. This method has found limited use in the isolation of volatiles from foods but continues to find significant application in the analytical field overall [6]. 

Shah KB, Augsburger LL, Marshall K. An investigation of some factors influencing plug formation and fill weight in a dosing disk-type automatic capsulefilling machine. J Pharm Sci 1986 75(3) 291-296. 

Water Clean up by disk-type Cl8 solid-phase extraction Capillary GC-ECD 0.12 ng/m L 103+8.6% (river water) 87+10.7% (sea water) Yamamoto et al. 1997... 

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