Tank mixers

Drainage slopes within tank areas should ensure that any spills are drained away from tanks, manifolds or piping. Small fires that can occur in gutters or drains around tanks weaken connections to the storage tank and release the contents of the tank. Any gutter encircling the tank should be located at a safe distance from the tank and drain basins should not be located under tank mixers, major valves or manway entrances to the tank. The diked areas should be provided with an impervious surface that is will collect liquids towards a drainage collection point. 

Stationary tank mixers, 76 721-722 Statistical amphiphilic polymers, 20 484-490... 

Where process equipment is provided with fixed-temperature detectors, these should be located as near as possible to the potential fire source for example, above flammable liquid pump seals, immediately over a solvent draw-off point, or mounted above a crude tank mixer stuffing box. As a general rule, fixed-temperature detectors directed at a potential hazard should be considered only for process equipment where specific fire problems are anticipated. 

Experiments to determine stability in tank mixers used in the field studies... 

Dosing pump ancillary items include chemical supply tanks (day tanks), tank mixers, flow indicators and controllers, level controllers and alarms, bulkhead fittings, corporation stops, and injection quills. 

One area for industrial studies is the whole area of slurry pipelines. Coal is by far the most common material in slurry pipelines, but other pipelines, but other pipelines include iron ore and potash. In large volume solid suspension applications, there is a considerable trade-off between volume of a tank, mixer horsepower, shape of a tank, and many other areas of cost consideration that are important in overall design. In addition to the tanks in these sorts of slurry systems, it must be capable of incorporating slurries into water or vice versa to either increase or decrease the solids concentration of a given system. 

When long residence time is not needed for chemical reaction or other purposes, small highly powered tank mixers may be suitable, with energy inputs measured in HP/gal rather than HP/1000 gal. They bring together several streams continuously for a short contact time (at most a second or two) and may be used whenever the effluent remains naturally blended for a sufficiently long time, that is, when a true solution is formed or a stable emulsion-like mixture. When it is essential that the mixing be immediate each stream will... 

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