Nozzles conical-cylindrical

For creating a continuous jet we used a conical-cylindrical nozzle 8 mm in diameter for a drop-type jet we used hydropneumatic and ejector nozzles " The size of the drops was determined by trapping them with a sticky compoimd. (The median diameter of the drops obtained after emerging from the hydropneumatic nozzle was 275 M.) The specific pressure over the cross section of the jet was measured by means of a system of detectors and an MPO-2 oscillograph. 

The velocities of the jets emerging from hydropneumatic and conical—cylindrical nozzles greatly exceed those required for the transportation of the particles, and this ensures the removal of the particles from the zone of contact between the jet and the surface after being detached. 

Because of high turbulence in the spout and the regularity of particle mixing, different types of spouted bed are highly appropriate to the placement of spray nozzles for the purpose of particle formulation, such as granulation or coating. Two examples in which liquid spraying occurs directly at the entrance of the gas jet, and which results in a concurrent, upward flow of the droplets and gas with frequent droplet-partide collisions, are shown in Fig. 4.3. The equipment shown in Fig. 4.3a is of the conical-cylindrical type, whereas the cylindrical device of Fig. 4.3b is named Wurster equipment, after its inventor (Wurster, 1959). The main feature of... 

Centrifuges are used for the classification of particles in size ranges below 10 /im. Two types are used solid bowl centrifuges, usually with a cylindrical, conical bowl, rotated about a horizontal axis and nozzle bowl machines, fitted with discs. 

Figure 23.21 shows schematics of two spray dryers, one fitted with a wheel atomizer (cylindrical-conical) and the other with a nozzle atomizer (single or two-fluid), which is a cylindrical vessel. 

Nozzles are placed in series along tubular reactor and have on the outside surface the flutes forming with inside surface of box wall screw canal (Fig. 6.6), and inside surface of nozzles has on flanks conical lugs with diameter in 1,3-3 times lower than in cylindrical part of inside cavity of nozzles and forming tubular turbulent reactor of divergent-convergent design (Fig. 6.5). Screw canal and inside cavity of nozzle are connected by holes and/or cuts, and beyond last nozzle in the course of gas-iiquid flow one or more static mixers are placed. 

The classic or conventional spouted bed (CSB) is a cylindrical vessel with a conical bottom fitted with an inlet nozzle for the introduction of the spouting air (drying medium). This device suffers from limited capacity due to the maximum spoutable bed height and inability to scale up the apparatus beyond... 

Open bushings. The channel for open bushings may be cylindrical (Figure 4.83a) or conical (Figure 4.61) in shape. A conical channel helps to prevent melt drooling from the bushing when the nozzle is removed. 

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