Agitating – Stationary deflector in flow-through mixing chamber – Plate or block being apertured – notched – or truncated in shape
Patent
1994-04-19
1996-07-23
Scherbel, David
Agitating
Stationary deflector in flow-through mixing chamber
Plate or block being apertured, notched, or truncated in shape
138 44, 138 45, 366336, F15D 102, B01F 506
Patent
active
055383440
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a device for the positioning of a mixing body with respect to a fluid flow area, for the mixing of a fluid, for example in a two-phase or multi-phase stream, especially but not exclusively in connection with sampling.
NO patent application No. 912796 discloses an isokinetic sampling apparatus adapted to take isokinetic fluid samples during different production conditions and which is connectable to a sampling point within a pipe, a tank, a separator, a heat exchanger, etc., wherein the fluid flows and is under a substantial pressure.
The present invention may be utilized in association with a sampling apparatus of this or similar kind, and has at least as large a field of use as the sampling apparatus according to NO patent application No. 912796 but, as the present invention is concerned with the positioning of a mixing body e.g. adapted with a view of mixing the gas component and the liquid component of a two-phase flow in a way to be closer described in the following, and as said mixing body positioning does not have any direct connection with said sampling but exclusively with the mixing effect caused, other applications of the present invention may be wherein the mixing function and the withdrawl of the body do not have any real association with an actual sampling.
For such a two- or multi-phase flow mixing and sampling, it is previously known very bulky sampling manifolds comprising three valves each weighing 500 kg, carried by a framework having a weight of 1500 kg. In one embodiment, this prior art sampling manifold consists of a pipe system having an upper inlet for the two- or multi-phase fluid to be tested, said upper inlet being connected to a first horizontal pipe piece wherein a first wheel-operated valve is coupled and which passes into a vertical pipe piece wherein the mixing body is fixedly mounted upstream of a sampling point. From there extends a horizontal pipe piece having an incorporated valve to the outlet, which is connected to the inlet via a pipe portion having an incorporated third valve. This prior art sampling manifold is too bulky, heavy and expensive in order to constitute an easily portable sampling apparatus having a reasonably wide application area. The inlet of the apparatus has to be coupled to the tested pipeline axially, and in many cases this is equivalent to the fact that the fluid flow within the tested pipeline or the like must be brought to cease prior to the connection and disconnection of the sampling manifold, if this very expensive known apparatus is not be connected permanently, the fluid flow then intermittently (each time a sampling is to take place) being guided through the apparatus.
From GB patent application No. 2,041,035, methods and apparatus for sampling have been known. The samples are taken from a fluid flow passing out from a well or the like, wherein the fluid comprises gas- and liquid-phase components. The pipeline wherewithin the two-phase flow passes and wherein the sampling is to be effected, is, according to this British patent application, equipped with a conventional mixing body which has been displaced axially into the pipeline, with all the difficulties such a positioning would involve especially with a view to the general withdrawal possibilities for the mixing body and its potenial need for maintenance and exchange.
A mixing body of the kind concerned consists conventionally of a relatively short pipe-shaped metal body having axial through-going bores which, except from a possible central bore, extend slopingly in relation to the longitudinal axis of the pipe-shaped mixing body, so that all bores meet in an imaginary "focal point". Such a mixing body wherein its axial slopingly extending bores effect an efficient mixing of the two phases of the flowing medium, particularly in the area of said "focus", has to be placed upstreams a sampling probe, the inlet end thereof thereby being located at a desired distance from said "focus".
Therefore, according to the present invention, one has aimed at providing a device
REFERENCES:
patent: 1559547 (1925-11-01), Brown
patent: 1921298 (1933-08-01), Lewis
patent: 3079796 (1963-03-01), Freudenthal
patent: 3780982 (1973-12-01), Kemp
patent: 4352572 (1982-10-01), Chen
patent: 4352573 (1982-10-01), Pandolfe
patent: 4410010 (1983-10-01), Van Scoy
patent: 4514095 (1985-04-01), Ehfeld
patent: 4781536 (1988-11-01), Hicks
Petrotech AS
Scherbel David
Till Terrence R.
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