Gas and liquid contact apparatus – Contact devices – Rotating gases
Patent
1996-01-29
1997-05-06
Miles, Tim R.
Gas and liquid contact apparatus
Contact devices
Rotating gases
B01F 304
Patent
active
056267991
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/RU/93/00181 Jul. 28, 1993.
The invention relates to the equipment to be used in the processes of mass exchange, in particular to the heat-mass exchange systems.
BACKGROUND OF THE INVENTION
Heat-mass exchange systems for gas (steam) and liquid contact comprising a housing with plates provided with turbulence contact elements are known (see SU, A1, 182108, 1966; SU, A1, 572272, 1977; SU, A1, 301429, 1987; SU, A1, 1398888, 1988; U.S. Pat. No. 4,237,426, 1980). Each turbulence contact element in this system is provided with a separating shell and a swirler giving an intensive phase contact due to rotating movement of the stream and its following separation.
However, these known systems operate effectively only in the narrow ratio band of the phase rates because of the great possibility at high rates of the liquid overflooding or downfall and at low rates the liquid is being carried away.
Known too are heat-mass exchange systems comprising a housing with plates on whose blade are arranged turbulence contact elements provided with coaxially mounted cylindrical shell with apertures in the low section and vertical slits in the upper section, a baffle, an overflow pipe and a swirl vane (see SU, A1, 580068, 1977). In this system swirled in the swirl vane gas (steam)being with contact with liquid incoming through the overflow pipe throws the liquid against the shell. The liquid after the contact is withdrawn in different operating regimes through the apertures, vertical slits or circular gap between the shell and the baffle.
However, in this system the apertures of the greate diameter available in the band of the plate for mounting in them the swirl vanes and overflow pipes limit the quantity of the swirl elements arranged thereon and thereby influencing on the output of the system. In addition the known systems have increased hydraulic resistance due to liquid stream incoming to the overflow pipe in turbulized condition.
SUMMARY OF THE INVENTION
The main object of the invention is improvement of the performance of the heat-mass exchange system owing to rigid construction of the blade of the plate, providing arrangement on it a great number of the swirl vanes and creating laminar movement of the liquid stream in the overflow pipe.
According to the invention in the heat-mass exchange system comprising the housing with the plates on whose blade are arranged the turbulence contact elements, the coaxially mounted cylindrical shell , the baffle, the overflow pipe with the apertures in the lower section and the vertical slits in the upper section, the blade are manufactured in form of a set of upwardly flanged shelves along whose longitudinal axis are mounted a series of the turbulent contact elements, while the grooves are fashioned around the circumference undernearth the intake section of the overflow pipes mounted therein; the blade of the plates is provided with the longitudinal plates secured between the flanges of the shelves and in the grooves formed in the intake section of the overflow pipes which protrude above the blade, while the longitudinal axis of the abutting shelves intersect at right angles. In addition the swirl vanes of the contact elements are made together with the blades by stamping of the shelves material and have an angle of attack of 10 to 45 degrees, and the shell and the overflow pipe are defined by the following ratio of geometric parameters:
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is illustrated by way of reference to the accompanying drawings, wherein:
FIG. 1 is a longitudinal cross section of the heat-mass exchange system according to the present invention;
FIG. 2 is a cross sectional view taken on line A--A in FIG. 1;
FIG. 3 is a view of the shelves embodiment;
FIG. 4 is a sectional view of the upper section of the overflow pipe embodiment.
DESCRIPTION OF PREFERRED EMBODIMENTS
The heat mass-exchange system is provided with housing 1 in which plates having turbulent contact elements are arranged. The blade of the plates is made of the set
REFERENCES:
patent: 2354674 (1944-08-01), Fisher
patent: 2596105 (1952-05-01), Schneible
patent: 3345046 (1967-10-01), Versluys et al.
patent: 4062663 (1977-12-01), Spevack
patent: 4755198 (1988-07-01), Darton
patent: 5145612 (1992-09-01), Reay et al.
Miles Tim R.
Tovarischestvo S Ogranichennoi Otvetstvennostju Nauchno-Proizvod
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