Gas separation – With nonliquid cleaning means for separating media – Solid agent cleaning member movingly contacts apparatus
Patent
1988-05-11
1989-06-13
Miles, Tim
Gas separation
With nonliquid cleaning means for separating media
Solid agent cleaning member movingly contacts apparatus
261 792, B01F 304
Patent
active
048389064
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates generally to chemical engineering industry, more specifically to mass-transfer techniques and has particular reference to contact-and-separating elements.
Present-day heat-and-mass transfer practice is faced with the problem of increasing the productivity, reducing specific metal content, enhancing the reliability and efficiency of the heat-and-mass transfer and phase separation processes. Since mass-transfer columns and liquid-gas separators prove to be the principal apparatus in the gas preparation and processing practice, solution of the aforestated problem will pave the way for development of spacesaving small-size arrangements of the miniature gas-processing plant type, adapted for use in petroleum-and-gas fields in outer continental shelf and in arctic regions, where low weight, small size and high specific output are at a premium nowdays.
Prior Art
Known in the present state of the art is a vortex contact element (c.f. USSR Inventor's Certificate No. 330,875, Int.Cl. BOId 3/30) making use of the swirling flow principle as the basic concept of its operation. The element comprises a vertical shell accommodating short cylindrical nozzles provided with axial swirlers at the inlet end and with hollow centrifugal separators at the outlet end. Central overflow pipes are provided for the liquid to take in and out. A principal working member in the known contact element is a stationary fixed multivane axial swirler which imparts rotation to the gas flow passing therethrough. To provide for adequately intense mass-transfer, use is made in such contact elements of complicated swirlers having hollow perforrated vanes.
However, such a contact element places restriction upon the diameter of the apparatus in the case of a multipleelement tray, since an increased number of contact elements upsets their uniform and regular operation,whereby intensity of mass-transfer is affected.
Known in the art is also a contact-and-separating element (cf. USSR Inventor's Certificate No. 475,160, Int.Cl. BOId 3/30), comprising a nozzle perforated in its bottom portion along the entire periphery thereof and provided with a multivane axial swirler at the inlet and a hollow separator at the outlet, both being situated in the zone of nozzle perforations, an annular partition being provided on the outer nozzle wall between the swirler and the separator.
Such a construction arrangement of the contact element is advantageous over that described above in making it possible to considerably enhance technical and economical characteristics of a high-rate multiple-element mass-transfer apparatus.
However, the aforesaid known contact element suffers from the limited mass-transfer intensity and fails to provide efficient separation of fine liquid droplets.
ESSENCE OF THE INVENTION
It is an object of the present invention to provide a contact-and-separating element featuring such a construction arrangement of an axial swirler that would ensure high intensity of the heat and mass transfer processes and separation of finely dispersed drops of liquid from the flow of gas.
The essence of the invention resides in the fact that in a contact-and-separating element of a vortex tray of liquid-gas mass-transfer apparatus, said element comprising a nozzle at whose inlet end there is provided at least one annular row of holes, an axial swirler having at least two inclined vanes and accommodated inside the nozzle, and a separator situated at the outlet nozzle end, according to the invention, a straight rib arranged lengthwise the nozzle axis and facing the nozzle inlet end is provided in front of each inclined vane of the axial swirler, and at least one intermediate rib is interposed between each pair of the straight ribs, while the annular row of holes is situated within the zone where the straight and intermediate ribs are located.
Such a construction arrangement of the contact-and-separating element provides for considerable intensification of the heat-and-mass transfer processes proceeding in liquid-gas
REFERENCES:
patent: 3296774 (1967-01-01), Hoogendoorn et al.
patent: 3605388 (1971-09-01), Zuiderweg et al.
Miles Tim
Ukrainsky-Nauchno-Issledovatelsky Institut Prirodnykh Gazov "Ukr
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