Scrubber dust trapping

Fig. 12-10. Schematic view of the analytical system for mercury determination by CVAFS (CVAAS) 1 pressure bottle for inert gas (Ar, N2,...) 2,15 flow meters 3 dust filter 4 gas-cleaning trap (Au) 5 reaction vessel (500 mL) (including stirring bar, PTFE-encased), seawater sample (200 mL) and (magnetic) stirring device) 6 three-way cocks 7 septum (Hg injection) 8 collection trap (Au) 9 analytical trap (Au) 10 voltage control 11,12 gas outlets (optional via three-way cocks) 13 AFS (AAS) detector and 14 mercury scrubber (charcoal trap).

FIGURE 1 Constructions of scrubbers with inner circulation of a fluid (a) - rotoklon N (USA) (b)- PVM CNII (Russia) (c) - a scrubber a VNIIMT (Russia) (d) - a dust trap to me (Czechoslovakia) (e) - dust trap WNA (Germany) (f) - dust trap Asco (Germany) (g) -dust trap LGP (Russia) (i) - dust trap Klayrator (USA) (k) - dust trap VDN (Austria) (1) - rotoklon RPA a NIIOGAS (Russia). 

In the scrubbers introduced on Figure 2, and, turn of controlling partitions is made either manually, or is distant with the drive from the electric motor, and in a dust trap on Figure 2, in - manually, moving of partitions rather each other on a threaded connection. In dust traps on Figure 2 (e). The lower partitions are executed in the form of a float or hnked with floats that allow to stabihze clearing process at varying level of a fluid. 

Before an entry in the contact partition of the apparatus there is a contraction of a gas flow for gas speed enhancement, acquisition of high layers of a fluid and its entrainment in the contact channel. Functionability of all dust trap depends on efficiency of acquisition of a fluid by a gas flow—without fluid acquisition will not be supplied effective interaction of phases in the contact channel and, hence, qualitative clearing of gas of a dust will not be attained. Thus, fluid acquisition by a gas flow on an entry in the contact device is one of the defined stages of hydrodynamic process in a scrubber with iimer circulation of a fluid. Fluid acquisition by a gas flow can explain the presence of interphase turbulence which is advanced on an interface of gas and liquid phases. Conditions for origination of interphase turbulence are the presence of a gradient of speeds of... 

Instead, fit all apparatus used in hoods with condensers, traps, or scrubbers to contain and collect waste solvents or toxic vapors or dusts. 

Determining relation of efficiency of trapping of corpuscles of a dust in a rotoklon from performance of a trapped dust and operating conditions major of which is speed of a gas flow in blade impellers. To develop a method of calculation of a dust clearing effieieney in scrubbers with inner cireulation of a fluid. 

Hertzian, M. H. Kirsanov, H. C. and Gordon, M. Effect of separate factors on efficiency of trapping of a dust in percussion scrubbers. Works GIN TsvetMeta. 1975,36, 112-117, Russian). 

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