Chute design

At the top of the furnace, the raw materials are charged into the furnace through a pressurized gas seal system, typically a double beU (see Fig. 6a). For very high pressure furnaces, three bells may be used. More recently, the Paul Wurth beU-less top has become popular, as its rotating chute design permits greater control over distribution of the burden (Fig. 6b). 

The measurement of the flow properties that are used to obtain the key chute design parameters are discussed later in this chapter. The application of these design parameters to provide reliable flow from the IBC to the press is discussed later in this chapter. 

AJso enclosed is a video of M-55 rocket processing, received from a source within TOCDF, which Indicates significant amounts of agent volatizatlon off the feed chute and kicker plate of the DFS. We request that the Committee look into the implications of what is recorded in this ideo to include, but not be limited to, the impact on the HVAC carbon filter design, DFS feed chute design and the potential for Incomplete agent destruction due to inadequate residence time at temperature. 

Recommendation (Pueblo) PH-4. The feed chutes to the shredders used in the Parsons/Honeywell process must be designed to avoid jamming. Tests should be run with chutes, shredders, and feed materials the size of those in the full-scale operations to ensure that the chute design is adequate. 

It will be noted that although increase of belt speed proportionately increases the capacity, or decreases the width of a conveyor with the same capacity, high belt speeds are disadvantageous to the feed and discharge chute design and performance. In general, therefore, belt speeds above 2 m/s are seldom considered acceptable for the relatively short conveyors within plant confines. 

Wensrich, C.M. (2003) Evolutionary optimisation in chute design. Powder TechnoL, 138, 118-123. 

Screw Conveyors Normally, screw conveyors are totally enclosed except at the ends, where emissions can be controlled by proper transfer chute design. To maintain a proper dust seal, a neoprene rubber gasket should be installed on the trough cover. Many manufacturers provide two-bar flanges and formed-channel cross members that make a continuous pocket around the trough. The flange-cover sections are set in this channel. Once the channel section is filled with dust, an effective dust seal is created. 

As discussed in Ref. [7], the efficient operation of belt conveyors depends on many factors, not the least of which is the effective loading or feeding of bulk solids onto the belts at the feed end. In the case of feeding from belt or apron feeders, (he fact that such feeders are normally limited to speeds less than 0.5 m/s, the bulk solid has to be accelerated to enter the conveyor bell at a speed matching, as close as possible, that of the belt. This may achieved by employing gravity to accelerate the bulk solid in association with a feed chute as illustrated in Fig. 6. Aspects of chute design axe discussed in Ref. [7]. 

The object of this present work is to investigate the effect of the interstitial gas on simple chute flows, where the carrier gas has previously been ignored in the kinetic theory approach (e.g. Cao et al. [8], Johnson et al. [9]). The chute-designing theory of Roberts Scott [10]... 

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