FR2473349A1 - PROCESS FOR SEPARATING THE LIQUID FROM A MIXTURE OF GAS AND LIQUID AND SEPARATOR FOR CARRYING OUT SAID METHOD - Google Patents

Abstract

at. Process and separator for separating liquid from a mixture of gas and liquid. b. The incoming jet of mixture E is diverted by a guide ring 35 in a helical movement towards an outlet pipe 22; the liquid contained in the jet being deposited on the internal wall 29 of an internal tube 27 is moved in the direction of the flow of the jet. At the end of the inner tube 27, it is guided by a partial jet II in a slot 30 between the latter and a separator tube 23. Through this slot, the liquid reaches a collector 34 from where it is discharged; the partial jet II is diverted there, freed from the remaining liquid and conducted by a communication tube 37 towards the outlet pipe 22. c. Thanks to the partial jet II, the separated liquid must flow in a forced way, which makes it possible to reduce the construction volume of the separator. (CF DRAWING IN BOPI)

Description

The present invention relates to a method for separating liquid

a mixture of gas and liquid,

  moving in the form of a jet into a separate chamber

  trice in which the mixture is diverted, and the liquid is thus caused to settle on the wall of said chamber. The invention also relates to a separator for the

implementation of this method.

  However, there are pressurized pipes for the transport of gases, from which the liquids entrained by the gaseous stream in the form of a fine mist or small droplets must be separated, and separators operating according to the method are employed for this purpose. principle of

  cyclone or the principle of baffles or bouncing walls

  ment. In both cases, the jet of gas and liquid is deflected so that the liquid is released from the mixing jet. In the case of the baffle separator, the jet enters

  at high speed in the separating chamber and it is direc-

  ge on a wall on which are deposited the droplets of liquid which then flow, forming larger drops, in a collector. The gas is deflected by the wall and leads to the outlet of the separator. In the area of the bouncing surface, the speed of the jet is lowered to the extent necessary to form a laminar flow, in order to avoid the entrainment of

drops.

  In the case of the cyclone, the jet entering the

  separator is deflected and set in rotary motion

  licoidal, and the liquid is projected onto the separating wall

  trice realized in tubular form, and it flows down in the opposite direction to the movement of the jet, forming larger drops. The rotary movement of the jet is obtained either by bringing the jet tangent into the separator, or by entering it radially and then driving it through the separator using a steering wheel arranged at the inlet of the bedroom

  separator and furnished with blades extending at an angle.

  In the separation chamber of the baffle separator as well as in that of the cyclone separator,

  it must have a relatively low flow rate

  This is because the whole chamber is wet, and the liquid flows practically only under the effect of gravity. This requires a relatively bulky and expensive form of construction, so that even for

  relatively small jets, the separator is so large

  that it does not comply with the existing regulations in most

  from the industrial countries concerning the type-approval

  pressure tanks. This makes it harder ..

  manufacturing and storage and causes

  plementary; in addition, the voluminous construction increases

  the costs for the material, the manufacture and the cost.

floor. -

  The present invention is intended to provide a method of the type described above, so that the extraction of the liquid from the mixing jet is possible with smaller size separators and a larger diameter.

less space.

  According to the invention this object is achieved, because the jet is deflected into the separating chamber and a partial jet is derived, which serves to evacuate the liquid deposited on the wall. As a result of the fact that the separated liquid is, so to speak, conducted and discharged by force, high speeds are permissible in the separator.

  without prejudice to the separating effect.

  In order to implement the method according to the invention, a separator is used which comprises a separator tube which has an inlet orifice. and an outlet port with a diverting device, wherein a separating wall is disposed inside the separator tube so as to define together with the inner wall of the separator tube an annular slot for the passage of the extracted liquid and the jet. partial to a collector, connected by a communication tube to the area of the outlet-orifice.

  The invention will be explained below in more detail.

  tail, with reference to the accompanying drawing which illustrates two examples of execution and wherein: Figure 1 is a longitudinal sectional view of a separator to be arranged vertically and whose outlet is directed upwards; FIG. 2 is an analogous representation of the

  separator according to Figure 1, but with lateral exit

  rale; Figure 3 is a longitudinal sectional view

  another form of the separator for vertical arrangement

  Figure 4 is a longitudinal sectional view of the separator according to Figure 3, but for horizontal arrangement. In the separator according to FIG. 1, the stream or jet designated by the arrow E, of a mixture of gas and liquid enters through the inlet orifice 1 into an inlet tube 2, the diameter of which is greater than smaller than that of the orifice 1. The inlet tube 2 is curved in an arc 3 downwards and coaxially extends to a separator tube 4 which

  constitutes the envelope of the separator, and presents a tubular

  lure 5 to receive the inlet port 1 of the inlet tube 2. Opposite the outlet 6 of the inlet tube 2, a hood hood 7 is arranged - also coaxially - inside the separator tube 4, in support members not shown in the drawing. This bell 7 consists of a conical dividing wall 8 and a hollow cylinder 9 which follows. The hollow cylinder 9 defines together with the separator tube 4, a slot 10 extending in the axial direction. The hood 7 delimits a collecting chamber 11, closed at the bottom by a curved bottom 12 connected to the separator tube

  4. By a bung disposed in the bottom 12, the liquid becomes

  accumulating in the collector 11 is evacuated.

  An ascending tube 15 extends from the manifold 11 coaxially to the separator tube 4 to reach an outlet orifice 16 constituting the exhaust port for the jet of gas freed of the liquid, indicated by the arrow A. separator just described is connected by

  its tubing 5 in a manner not shown in the drawing -

  for example by a weld or a flanged connection - a pressure line, preferably disposed at the outlet of a compressor, while the exhaust mouth 16 is connected in a manner also not shown at the inlet, for example, a pipe under pressure. At the mouth 6, see FIG. 1, is disposed a tubular piece 18 slipped on the inlet tube 2, this piece 18 delimiting a slot 19 together with the inlet tube 2. This niece 18 constitutes together with the slot 19 a injector

  which prevents the rise of drops of liquid towards the

exhaust 16.

  The separator according to Figure 1 separates the

  the fluid in a mixture of gas and liquid in the manner described below: The jet E entering through the inlet port 1 in the inlet tube 2 is deflected downwards, it is accelerated as a result of the shrinkage of the inlet tube 2 and at the end 6 of the latter, it is divided into a main jet I and a partial jet II. The main jet I, substantially larger than the partial jet II, is deflected to the separating wall 8 and directed upwards towards the outlet orifice 16, while the partial jet II entrains the separated liquid along the the separating wall 8, through the

  slot 10, in the collecting chamber 11. In this

  However, the speed of the partial jet II is substantially reduced.

  thanks to the relatively large section of the separate tube

  4, and it goes back up in the form of a laminar flow

  through the ascending tube 15 in the area of the

16.

  During the impact of the jet on the separating wall

  8 and the deflection of main jet I, which is

  the entire liquid contained in the incoming jet in the form of mist or small droplets, is separated by being deposited on the separating wall 8 or the inner wall of the separator tube 4, and by the partial jet II, the liquid is continuously entrained and removed from the dividing wall 8 and leads into the chamber

  11. The main jet I, on the other hand, is

  born towards the separating wall 8 and flows through the annular chamber surrounding the inlet tube 2 towards the orifice

Exhaust 16.

  In the separator just described,

  relatively large ones can not form on the

  separating wall 8, because the liquid is continuously

  evacuated by the partial jet II and that it is

  a relatively high speed down in the chamber

  collector 11. The partial jet II is not capable

  to pull up any possible deliquescent particles

  of the collector 11. As a result of the continuous evacuation of the extracted liquid, it deposits on the conical separating wall 8 only a thin film of liquid; the main jet I, freed of the liquid, can therefore have a high speed and high turbulence, without the risk of dripping liquid. The separator can, therefore, have a small footprint without the

separation suffers.

  According to FIG. 2, the exhaust mouth 16 and the inlet mouth 1 are disposed around the periphery of the separator tube 4. In this case, the separator tube 4 is closed by a cover 20 and the upper end of the riser pipe 15 is bent towards the exit orifice

  16. The latter may also be offset from the original

  1. This does not affect the prevailing conditions

-. : -.;: l:

  in the separation chamber.

  It would also be possible to arrange the pipe -

  ascending 15 not coaxially but eccentric.

  In the separator according to Figure 3, the jet -

  E enters through an inlet pipe 21 and the jet A, freed of the liquid, exits through an exhaust pipe 22. The

  separator comprises a separator tube 23 with coverings

  upper and lower keys 25. In the upper cover

  24, is fixed (for example by welding) the exhaust pipe 22, and in the lower cover 25 a

  discharge pipe 26 to remove the extracted liquid.

  Ooaxially to the separator tube 23, an inner tube.

  27 is centered in the latter, using bars 28. The

  inner wall 29 of the tube 27 constitutes the separate wall

  for the droplets of liquid found in the jet E. The inlet pipe 21 passes through a slot 30 delimited by the separator tube 23 and the inner tube 27,

  and this tubing opens into the inner chamber con-

  tituée by the inner tube 27, whose lower end is closed by a curved bottom 32, which however has some openings 33, through which the liquid which accumulates at the bottom 32 is unloaded in the slot 30. The bottom 32 constitutes together with the separator tube 23 a manifold 34, for receiving the separated liquid which is

  deposited on the inner wall 29 of the inner tube 27.

  The reentrant jet E is diverted into the inner tube 27 upwards and passes through a steering ring composed of a number of vanes 36 arranged at an angle, and in which a rotation is printed on the jet E, so that it performs a helical movement towards the inlet manifold 21. The diversion of the jet E and the production-of the movement

  helicoldal along the inner wall '29 bring the liquid- - -

  to deposit on it. But as the speed of the jet is large, because of the small dimensions of the separator, A liquid that accumulates on the inner wall 29 is moved

  in the direction of the outlet pipe 22, and it is driven: -

  at the upper end of the inner tube 27 in the slot 30, by a partial jet II derived from the jet A and whose driving effect exerted on the liquid that, despite

  the small diameter of the inner tube 27, the totality of the

  The partial jet which reaches the manifold 34 is idle and diverted and during this movement it again rejects the droplets of liquid which may remain there and conducts them through a communication tube 37 fixed on the bottom 32, in the room

  separation zone 38 itself, in the zone of the tubular

Exit lure 22.

  Just like the separator according to FIGS. 1 and 2, the separator according to FIG. 3 is very efficient, despite its small size and it allows a good extraction of the liquid contained in the jet, as is the case for

  bulky separators with baffles or cyclones.

  The separator according to FIG. 3 can be used for the vertical assembly and the separator according to FIG. 4 for horizontal mounting. However their realization is to a large extent identical and for this reason, the same elements of construction are designated by the same

  reference numbers and they will no longer be described here.

  The jet E enters through the inlet pipe 21 in the

  separator and this manifold is disposed in its bottom 32.

  The inner tube 27 has, near the outlet pipe 22, centering bars 28 and in the zone of the inlet pipe 21 an enlargement 31 which separates it from the inner chamber constituted by the inner pipe 27.

of the slot 30.

  The collector 34 is arranged so that its axis 39 is perpendicular to the axis of the inner tube 27 and the separator tube 23. The partial jet II which is also formed in this case, causes the liquid, which is deposited

  to the inner wall 29, in the manifold 34, where the jet par-

  It transfers the liquid it contains and escapes through

  to the communication tube 37 bent at 900, in the separation chamber itself and mixed with the dehydrated jet A. the liquid which is deposited on the inner wall 29 is moved, as in the embodiment of the invention according to Figure 1, by the jet to the inlet pipe 21 o the partial jet II enters the slot 30 and the duct in the manifold 34. It is the responsibility of the steering wheel 35 to divert the jet E to print a helical movement, as is the case for the

  embodiment according to Figure 3.

  It would be possible to provide several tubings

  1, 21 for the admission of several jets which

  would be evacuated after drying through one or more

outlets.

  By appropriate dimensioning of the separation chamber and the slot, it is possible to achieve an optimum ratio between the flow rates of the jet A and the partial jet II. It is

  as can be achieved with a construction of

  and for a comparable degree of separation, a pressure loss comparable to that of separators

bulky known.

  The separators described above can also

  be used to separate solid particles from a jet of gas or liquid. I. formation of a partial jet II, which evacuates the separated matter, is also done in these cases

in the same way.

Claims (8)

  1. A method for separating the liquid from a mixture of gas and liquid moving in the form of a jet (E) in a separating chamber in which the mixture is diverted and the liquid is thus caused to settle on the wall of said chamber, characterized in that the jet (E) is deflected in the separating chamber and a partial jet (II) is derived therefrom, which serves to evacuate the liquid deposited on the wall (8).   2. Method according to claim 1, characterized in that the partial jet (II) is derived from the re-entrant jet   (E) after the deflection of the latter.   3. Method according to claim 1, characterized in that the partial jet (II) is united, downstream of the diverting point, in the center of the separation chamber, with the main jet.   4. Method according to any one of the claims   previous, characterized in that the extracted liquid moves in the separating chamber essentially in   the same direction as the jet of gas (I).   Separator for carrying out the process according to claim 1, comprising a separator tube (4) which has an inlet port (1) and an outlet port (6) with a diverting device, characterized in that separating wall (8) is arranged inside the separator tube (4) so as to define together with the inner wall of the separator tube (4) an annular slot (10) for the passage of the extracted liquid and the partial jet (II ) to a collector (11) connected by a tube of   communicating (15) to the area of the outlet (16).   6. Separator according to claim 5, characterized in that the separating wall is an inner tube (27) coaxial with the separator tube (23).   Separator according to Claim 5, characterized   in that said communication tube (15) is arranged 8. in that 9. in that paratrix (32). to the inner tube (8).   Separator according to claim 5, characterized   the collector (34) has an axis (39) perpendicular liaxe of the separator tube (23). -   Separator according to claim 5, characterized   the inner tube (27) constituting the separate wall   is closed with respect to the collector (34) by a bottom 10. Separator according to claim 5, characterized in that the dividing wall (8) is conical and located opposite the outlet mouth. ) of a-tube   inlet (2) connected to the inlet port (1) of the separator.   11. Separator according to claim 10, characterized   risé in that the conical separating wall (8) is extended in the form of a hollow cylinder (9).