RU2108134C1 - Separator - Google Patents

Abstract

FIELD: separation of liquid phase from two-phase gas/vapor/liquid flows. SUBSTANCE: separator includes taper housing widening towards motion of two-phase mixture, coaxial branch pipes for introducing gas-and-liquid mixture and discharging gas and liquid outlet branch pipe. Secured on inner surface are spiral fins which are located oppositely and symmetrically relative to vertical axial plane at angle of inclination towards running-off of liquid and downward in way of flow on either side of housing. Gas discharge branch pipe is provided with truncated cone in its front portion; larger base of this truncated cone is connected with gas outlet branch pipe and less base is located in zone of mixture inlet branch pipe and is inclined relative to flow of mixture. In its rear portion, gas discharge branch pipe is provided with port made in form of slit located over generatrix in upper portion of branch pipe which is fitted with guide baffles. EFFECT: enhanced efficiency. 3 cl, 4 dwg

Description

 The invention relates to a device for separating (separating) a liquid phase from biphasic gas (steam) -liquid streams.

 A centrifugal droplet eliminator is known, comprising a cylindrical body with inlet and two outlet nozzles for the gas and liquid phases, respectively, mounted conically in the housing sequentially behind the inlet nozzle, a conical blade swirler made with equal twist angles, and a separation chamber with a helical groove on the inner surface of the housing.

 The described droplet eliminator is effective in the separation of liquid from a two-phase stream of only a dispersed and film structure.

 A device for condensate separation is also known, comprising a horizontal cylindrical body, nozzles for introducing and discharging a gas-liquid mixture located coaxially to the body, a transverse screen with a visor, and drop collecting sections.

 The disadvantages of the above device include: inefficient operation of the device under the conditions of a shell (plug) mode of gas-liquid flow, insufficiently high-quality separation process, relatively high hydraulic resistance.

 The essence of this proposed invention lies in the fact that the separator has a conical body, expanding in the direction of movement of the two-phase mixture, coaxial nozzles for introducing a gas-liquid mixture and gas outlet, a liquid outlet pipe. On the inner surface, spiral ribs are mounted that are opposite and symmetrical with respect to the vertical axial plane with an angle of inclination in the direction of liquid runoff and from top to bottom along the flow on both sides of the housing. The gas outlet pipe in the front part is equipped with a truncated cone, the larger base of which is connected to the gas outlet pipe, and the smaller base of the cone is located in the zone of the mixture inlet pipe and is inclined at an angle to the mixture flow. In the rear part, the gas outlet pipe is provided with a window in the form of a slit located along the generatrix in the upper part of the pipe, as an option, the window is equipped with guide shields.

 The aim of this invention is to increase the efficiency of separation of liquid from a gas-liquid stream for any of the four flow regimes: film, dispersed, projectile (cork), separated. You can use the device both on a regularly stable one of the listed modes, and on a stream that is periodically rebuilt from any one mode to any other mode.

 In FIG. 1 is a vertical axial section through a separator; in FIG. 2 is a view from the axis side of the sweep of the separator body; in FIG. 3 - section "aa" of figure 1; in FIG. 4 shows the node "B" in figure 2.

The invention is implemented as follows. The case 1 having the shape of a truncated cone, on the side of the smaller base has a nozzle for introducing a gas-liquid mixture 2, and on the side of the larger base there are nozzles for the release of gas 3 and liquid 4. On the inner surface of the body 1, ribs 5 are reinforced at an angle of 90 ^° to the lower generatrix ( figure 2) so that in the lower part of the housing 1 they have gaps of width "n". The pipe 3 is introduced into the housing 1 and is connected to a truncated cone 6, the tapering end of which is located near the pipe 2 and is drowned out by a smaller base 7, inclined to the separator axis by an angle β. The nozzle 3 has a window 8 made in the form of a slit along the upper generatrix on the nozzle 3 with a slit width "b". Alternatively, the window 8 from above on both sides may be provided with shields 9.

 The ribs 5 can be made either in the form of a straight strip (figure 1), or can have an upper edge bent towards the flow (figure 4).

 The work of the separator is as follows. In the film flow regime, the liquid film, entering through the nozzle 2 into the housing 1, flows onto the ribs 5 and, as a result of the dynamic action of the gas moving above the film, flows onto the lower generatrix of the housing 1, and then through the gaps of the width "n" towards the liquid outlet 4. then discharged from the separator. In the presence of a dispersed flow or plugs of the gas-liquid composition sequentially, these flow elements leak onto the smaller base 7 and are deflected by the latter into the lower part of the housing 1, flowing to the nozzle 4 at the outlet of the separator. In this case, gas in the form of bubbles and free jets (the upper zone of the device’s volume) is separated and rises, which is facilitated by a smooth decrease in the speed of both phases due to movement along the body 1 expanding along the flow). Then the gas flows through the window 8 and the pipe 3. The guiding flaps 9 prevent liquid from entering the window 8 when vertical ripple bursts of condensate occur in the area of the pipe 4.

 The separator has transverse dimensions and can be built into existing pipelines without making drastic changes in the direction of flow and does not require additional capital structures.

 The hydraulic resistance of the separator in the gas phase is small and depends mainly on the degree of throttling in window 8, the coefficient of resistance of which is about 0.7 (live section is approximately equal to the live section of nozzles 8), and when using shields 9 it can be reduced to ≈ 0.4 .

References:
1. SU, Copyright certificate N 2035971, cl. B 01 D 45/12, 1995.

 SU, Copyright certificate N 1690807, cl. B 01 D 45/08, 1991.

Claims (3)

 1. A separator comprising a housing, nozzles for introducing a gas-liquid mixture and gas outlet, arranged coaxially, a transverse screen and a nozzle for discharging liquid, characterized in that the housing is conical and expanding in the direction of movement of the gas-liquid mixture, on the inner surface of which spiral ribs with an angle of inclination are fixed towards the drainage of the liquid phase and from top to bottom in the direction of flow, symmetrically on both sides of the housing, and the gas outlet pipe in the front part is equipped with a truncated cone, the larger base of which connected to the outlet pipe, and the transverse screen is made in the form of a smaller cone base located in the zone of the mixture inlet pipe and inclined at an angle to the mixture flow, and in the rear part of the gas outlet pipe is provided with a window in the form of a gap located along the generatrix in the upper part of the pipe .  2. The separator according to claim 1, characterized in that the window at the inlet of the flow is equipped with guide shields.  3. The separator according to claims 1 and 2, characterized in that the ribs are made with vertices bent towards the flow of the mixture.

Images