Conical grids

Figure 33. Tracer gas contour profiles—tracer injected via conical grid.

If turndown is desired, the grid pressure-drop criteria (Eqs. 3 and 4) must apply at the minimum gas flow rate. Also, if the grid is curved, i.e., concave, convex, or conical, the criterion must apply with respect to the... 

Boats for glass knives Conical centrifuge tubes Copper grids Dental wax... 

In a later generation of fluidized bed classifiers the feed is poured onto the grid from above (Fig. 3c, d), so crushing is eliminated [9], Several prototypes of such fluidized bed classifiers with cylindrical or conical chambers of diameter 350-1700 mm and throughput of 0.5-10 t/h, were constructed for separation of sand, potassium chloride and ground phosphate particles with sizes from 50 to 1.5 mm [10], The recovery of coarse fraction was 75-92%. 

Figure 10.30 (a) An array of parabolic focal conic defects viewed normal to the glass plates separated by a gap of 125 Aim. (b) Schematic of (a) showing a three-dimensional grid structure of a regular array of parabolic focal conic defects. (From Rosenblatt et al. 1977, with permission from EDP Sciences.)... 

Type of gas distributor There are several types such as conical bottom, packed bed, and grid. 

Concentric holes in both plates accept the circular nose pieces of the subassemblies. The weight of the subassemblies is supported at a conical seal face on the top grid plate. This grid structure is the coolant inlet plenum, coolant entering side holes in the nose pieces. Close fits of the nose pieces in the lower grid plate provide a hydraulic hold-down, the area between the lower grid plate and the reactor vessel being opened to the primary tank. 

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