Sloped bottoms

Tray Classifier A hybrid like the screw-conveyor classifier, the tray classifier rakes pulp up the sloping bottom of a tank while solvent flows in the opposite direction. The solvent is forced by a baffle to the bottom of the tank at the lower end before it overflows. The sohds must be rugged enough to stand the stress of raking. 

A series of fixed trapezoidal cells that form a rotating table and each connected to a stationary valve in the center of the filter. The cell is designed with steep sloped bottom for fast evacuation of the filtrate. 

An electroflotation plant usually consists of a steel or concrete tank with a sloping bottom as shown in Figure 1.49 liquid depth may typically be about 1 m. Since the flotation process is much faster than sedimentation with fine particles, flotation can be achieved with much shorter retention times — usually about 1 hour (3.6 ks) — and the land area required may be only about one-eighth of that for a sedimentation tank. 

Figure 5, Artemisia herba-alba on a North-facing Slope (bottom) and Zyqophyllum duroosum on a South-facing Slope (top). ...

Uniform flow will eventually be established in any channel that continues sufficiently far with a constant slope and cross section. This may be stated in another way, as follows For any channel of given roughness, cross section, and slope, there exists for a given flow one and only one water depth y0 at which the flow will be uniform. Let A represent the water depth at the slope top. Let B represent the water depth at the point where the slope starts downward off the top. Let points C and D represent the water flow at uniform depth and flow down the slope. Let point E represent the beginning of stabilized flow after reaching a horizontal plane at the slope bottom. Thus, the flow is accelerating in the reach from A to C, becomes established as uniform from C to D, suf-... 

Figure 6. Slope stabilization with a sulfur composite lining. (top left) Slope became unstable when saturated from heavy rains. (top right) Spray application of sulfur composite to the rim of the slope. (bottom left) The slope after the lining was installed.

Rake and Spiral Classifiers Rake-type classifiers such as the Dorrf classifier and spiral types such as the Akinsj have been the workhorses for general-classification problems for half a century, and their names describe the mechanisms installed in sloping-bottom tanks. See Fig. 19-24. Mechanically the devices are powerfully built, and functionally they are versatile and flexible. They were tfie first classifiers used successfully for closed-circuit grinding. Separations as fine as 325 mesh can be accomplished at reduced tonnage rates. 

This naturally leads into a consideration of vessel design. The importance of contouring and of expansion joints has been covered earlier other design details common to vessels and trenches have been touched on in Drawings 1,3, 4, 5 (for sloping bottoms), 6 (where there may be a need to control the direction of... 

Figure 4.17 Example for the one parameter asymmetry correction. Top a symme trical ML curve with the correction function added k= 0.8). This is an odd function that does not change either the integral intensity or the peak height. Moreover the 1st derivate of the correction is zero at the central part. Thereby, also the peak position is kept unchanged. Middle The sum of both curves yields an asymmetrical peak. The minimum of the 2nd derivative is slightly shifted to the narrow slope. Bottom Application of the asymmetrical profile (in total five parameters) on the Si(lll) reflection from Figure 4.14.

The septic tank has a sedimentation action as well as the destruction of putresible matter. It is often a large tank constructed so that solids may settle into a sloping bottom where bacterial action goes on anaerobically. Anaerobic putrefactive bacteria here destroy nitrogenous matter and evolve gases due to their action. This bacterial... 

The mononitrator in a TNT plant consists of a steel tank 6 ft 6 in. in diameter and 5 ft 5 in. high with a flat covered top and a flat but sloping bottom. An agitator consisting of a 24-in. tribladed propeller is centered in the tank. An exhaust system maintains a 2-in. water vacuum to remove fumes. The cooling surface consists of IJ/ -in. steel pipe bent into concentric helical coils. There are five banks of coils. 

Isaaeson, E. (1959). Water waves over a sloping bottom. Comm. Pure Applied Math. 3(1) 11-31. Isaaeson, E., Keller, H.B. (1966). Analysis of numerical methods. Wdey New York. http //www.siam.org/news/news.php id=1403 P... 

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