Spray system flow diagram

The flow diagram shown in Figure 161 describes a modern multipurpose fluidized bed spray granulation system. Feed solution, suspension, or melt are supplied by the feed pump (1.1) through the feed pipe (1.2) and nozzle (2.1). At the beginning (start-up) the system works as a spray dryer and the... 

Figure 2. Flow diagram for adipic acid-enhanced scrubbing in the venturi/spray tower system with two scrubber loops and forced oxidation.

Lime tests with One Scrubber Loop and Without Forced Oxidation. Tests with adipic acid in lime scrubbing also were impressive in enhancing S02 removal, both on the venturi/spray tower and TCA systems. Table 4 shows some typical results of adipic acid-enhanced lime tests from the Shawnee TCA without forced oxidation. The flow diagram for these tests is shown in Figure 3. 

This was illustrated in a long-term adipic acid-enhanced limestone run, Run 917-1A, conducted on the Shawnee spray tower system from December 26, 1980, to March 13, 1981. Figure 4 shows the flow diagram for this long-term run with forced oxidation using two series tanks in the slurry loop. Oxidation was forced in the first tank while fresh limestone was added to the second. Use of two tanks in series in a within-scrubber-loop forced oxidation system has several advantages over a single tank ... 

Figure 2. Spray dryer MgO FGD system process flow diagram.

Pneumatic Sulfur-Spraying System. Sulfur-Coated Urea with Sealant. Figure 3 is a flow diagram of the pneumatic sulfur-spraying system. This system provides better atomization than the hydraulic system, which is discussed later. With the pneumatic system less sulfur is required, producing a higher analysis sulfur-coated urea fertilizer. 

Figure 3. Flow diagram of system for supplying sulfur to pneumatic spray...

Fig. 6.2-77 The flow diagram of a typical film coating facility a) programmable logic controller (PLC), b) storage tanks for spray hquid(s) and metering/pumping system, c) equipment for supplying and processing air, d) air cleaning and exhaust system [B.48, B.97]...

Particularly if dry powder is produced in a spray dryer plant from solutions, suspensions, or slurries, agglomeration can be accomplished if the partially solidified but still moist particles are tumbled in an associated fluidized bed where, in most cases, final drying also takes place. Fig. 6.2-17 is the schematic flow diagram of a continuous fluidized spray dryer (FSD). As compared with the conventional spray dryer [B.48, B.49, B.71, B.93], a somewhat modified gas handling system is the most obvious new feature of the FSD. Drying gas (9) not only enters the top of the tower for cocurrent drying but also a so-called plenum , a specially designed chamber at the bot-... 

Containment spray system (one of two trains) flow diagram. 

Two versions of the ACP have been developed (1) an open-loop configuration in which the dry spent absorbent is simply removed from the system for disposal and fresh alkali is continuously fed to the spray dryer, and (2) a closed-loop process in which the spent absorbent is regenerated and reused. The open-loop system was installed on the 410 MW, Coyote Station at Beulah, North Dakota (Botts et al., 1978). The plant used a spray dryer followed by a fabric filter for simultaneous SO2 and dust removal. As indicated by the flow diagram of Figure 7-32, the process is extremely simple. Because the particulate collected on the fabric filter bags remains on the fobric for a period of time, the gas-solids contact time is extended beyond the particulate residence time in the spray diyo so additional absorption of SO2 by the alkaline material occurs. After this system went conunercial in 1981. no other large soda ash spray dryers were built. About 1990, this scrubber was converted finm soda ash to lime to eliminate solids build-up in the dryer vessel and to use lower cost lime. The... 

A simplified flow diagram for a lime slurry spray dryer system is shown in Figure 7-34. This diagram represents the 100 MW Demonstration Plant on Units 6 and 7 of the Riverside Station of Northern States Power Conqiany. The plant was used for extensive testing of die effects of various operating variables on a large 46-fi diameter spray dryer absorber (Gutslke etal., 1983). 

The diagram shows only the direct interdependence between the various phenomena. Of course, as presented, all the flow, spray, and combustion processes are coupled at many levels. For example, in order to compute the spray properties via the spray submodels, the gas variables including turbulence quantities, need to be known, and the same is true for solving the chemical reaction equations. Since all these phenomena have their own characteristic length and time scales, and these scales range over a wide spectrum, the solution of this system of equations poses a real challenge. 

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