Gas dissolving system and method

Gas and liquid contact apparatus – Contact devices – Liquid tank

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B01F 304

Patent

active

050493205

ABSTRACT:
An improved gas dissolving and releasing system involving the use of multistages of porous gas dissolving media at the center and near the wall of a pressure vessel is described. The gas dissolving system includes a liquid pressure pump, a pressure vessel with tangential inlet and outlet, a gas injector, an inlet nozzle assembly, a center gas dissolving tube, one or more wall-mounted gas dissolving plate assembly, a gas compressor, gas regulators, gas flow meter(s), pressure gauge(s), safety valve(s), sight tube(s), a bleed-off point, a pressurized water release unit, and a liquid flow meter. The liquid flow pattern inside of the pressure vessel is controlled to be of either swirling upflow, swirling downflow or swirling horizontal flow at a rotation speed of over 2,500 rpm. A set of special nozzles with different orifices is designated for precise liquid flow control and liquid rotation speed control. More than one gases introduced at different inlets are dissolved simultaneously and efficiently in the pressure vessel under controlled pressure at 2-7 atm. The improved gas dissolving system is compact, simple and cost-effective, and is applied to ozonation, chlorination, recarbonation, oxygenation, nitrogenation, aeration, and flotation processes.

REFERENCES:
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patent: 4838434 (1989-06-01), Miller et al.
The U.S. Dept. of Commerce, National Technical Information Service (NTIS), Report #PB 83-127704, (1982), by L. K. Wang.
Journal American Water Works Association, Jun., (1982), by M. Krofta & L. K. Wang.

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