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Downdraft hood

FIGURE 10.37 Downdraft hood for small-scale laboratory work. [Pg.874]

Downdraft hood A hood positioned under a process that receives gases, vapors or dusts from the source above. [Pg.1430]

Plenum at least 1 foot deep Downdraft hood (Figure 2 ... [Pg.1217]

The exterior hoods described here are divided into basic openings, rim exhausts, low-volume high-velocity (LVHV) hoods, receptor hoods (canopy hoods), and downdraft ventilation tables. Many varieties of these types of hoods exist. Some of these have been described and investigated more thoroughly than others because they are used more often or they are of more general use and applicability than the more specialized hoods. [Pg.819]

Small versions of downdraft tables (less than approximately 0.5 m-) are used when small-sized chemical work is to be done on rabies instead of in laboratory-fume hoods (see Fig. 10.37). This includes work with low-momentum source (no initial velocity and near room temperature) such as laboratory animal experiments. [Pg.873]

Caltech had high standards of safety and protection of research workers and students. The new Crellin Chemical Laboratory, finished in 1939, had at least one large fiime hood in every laboratory. There were small downdraft fume hoods along the center of each work bench in the freshman chemistry laboratory, so that every two students had their own mini-hood. Before carrying out war-gas research. Professor Roscoe Dickinson asked for doubling the pumping capacity for two fume hoods in 65 Crellin and raising the... [Pg.119]

The feed, consisting of a blend of fine ore and solid fuel (coal), is first placed as uniformly as possible onto an endless perforated belt, made-up of connected and hinged cast iron or steel sections, and then passes through an ignition furnace, which is a short hood with burners inside. The flames impinge on the surface of the bed and ignite solid fuel that is close to the hot interface. From that point on, air is pulled through the completely open bed, in a downdraft fashion combustion of the solid... [Pg.746]

Dust Collection Systems A dust collection system is one of the most effective ways to reduce dust emissions. The rate of airflow through the exhaust hood is the most important factor for all types of hoods. For local, side, downdraft, and canopy hoods, the location is also important because the rate of airflow is based on the relative distance between the hood and the source. The shape of the exhaust hood is another design consideration. [Pg.293]

Johnson, W. M., Sheppard, L. E. and Barton, D. N. (1977). A downdraft fume hood for the control of toxic vapours of heavy liquids used for mineral separation. Canadian Journal of Earth Sciences, 14,2422—2424. [Pg.173]


See other pages where Downdraft hood is mentioned: [Pg.974]    [Pg.1217]    [Pg.974]    [Pg.1217]    [Pg.196]    [Pg.404]    [Pg.749]    [Pg.353]    [Pg.193]    [Pg.172]   
See also in sourсe #XX -- [ Pg.874 , Pg.1430 ]




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