JPS641186B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centrifugal separation device for mixtures, and more particularly to a device for separating vapors (gases) and liquids, and mixtures of liquids and solids by centrifugation. This separator can be installed vertically or horizontally.

A device of this kind was filed in the name of the applicant on October 13, 1983.
French patent application no. 8316289 filed on date and
French patent application filed January 31, 1984
Relating to the subject matter of No. 8401474.

In the two patent applications mentioned above, several means of partial reintroduction are disclosed in order to re-separate the most dense part.

An object of the present invention is to provide a centrifugal separator for mixtures having reintroduction means capable of improving separation performance.

According to the invention, the objective is to provide two
a first tubular member for directing a mixture of two objects to flow from an inlet toward an outlet; and a longitudinal central axis for directing the mixture flowing through the first tubular member at the inlet of the first tubular member; a fixed wing disposed at the inlet of said first tubular member for pivoting about said first tubular member; one end substantially coaxial with said first tubular member for receiving an outlet of said first tubular member therein; a second tubular member provided in the first tubular member;
a third tubular member disposed substantially coaxially within the second tubular member and having one end inserted into the outlet of the first tubular member with a predetermined gap therebetween;
a tubular member disposed between the first tubular member and the third tubular member, one end communicating with the annular space between the second tubular member and the third tubular member. The other end is connected to the third tubular member to pass through the first tubular member between the fixed wing and the third tubular member in a radial direction of the first tubular member. This is achieved by means of a centrifugal separation device for the mixture, comprising a return pipe member open in the direction between the downstream direction and the return pipe member.

According to the invention, in addition to the first stage of centrifugation of the mixture at the outlet of the first tubular member, the separation of the mixture at one end of the third tubular member can be centrifugal and therefore the second stage of centrifugation. In the separation of , separation performance proportional to the flow rate of the mixture can be obtained, and in addition,
The flow of the separated less dense material from the other end of the third tubular member may be facilitated by a swirling flow of the mixture by a fixed vane provided at the inlet of the first tubular member.

Hereinafter, preferred embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a centrifugal separator for a mixture of water and steam.

The device comprises a tube 100 which allows a mixture of water and steam of different densities to flow from an inlet 1 towards an outlet 105 and is arranged vertically, and a tube 100 which allows the mixture flowing through the tube 100 at an inlet 1 of the tube 100 to flow along the length of the tube 100. a fixed wing 102 disposed at the inlet 1 of the tube 100 for pivoting about a central axis; a tube 2 having one end disposed substantially coaxially with the tube 100 so as to receive the outlet of the tube 100 therein; It is arranged in the tube 2 almost coaxially with the tube 100, and one end is connected to the tube 100.
A pipe 103 is inserted with a predetermined gap into the outlet 105 of the Pipe 1 to communicate with annular space 107
03, the other end of which is open in the tube 100 between the fixed blade 102 and the tube 103 through a hole 116 in a direction between the radial direction of the tube 100 and the downstream direction; Consisting of

A fixed vane 104 is provided within the tube 103 to straighten the flow of the mixture flowing through the tube 103 while swirling around the central longitudinal axis of the tube 100 . The lower end of the tube 2 is provided with an outlet 109 for discharging the separated water in the annular space 107 between the tube 2 and the tube 103. A plug 3' is provided at the bottom of one end of the return pipe 120. The conduit 130 has a water droplet shape in cross section, and its rounded tip is arranged so as not to add pressure loss to the flow of the mixture flowing in the conduit 103.

Centrifugation is performed as follows. The mixture of water and steam to be separated is introduced into the separation device through inlet 1. Stator vanes 102 impart a swirling motion to the mixture flow, separating the water toward tube 100 by centrifugal force.

Almost all the water flowing out onto the tube 100 or present in the vicinity of the wall of the tube 100 flows into the outlet 105 and towards the annular space 107 and further towards the drain 109 . The entry and exit of water into the outlet 105 may be facilitated by extraction of a predetermined amount of steam. The steam which is hardly led to the outlet 105 and the small amount of water which is not discharged by the outlet 105 is led into the pipe 103 and is rectified by the fixed vanes 104 for suppressing the swirl movement. Therefore tube 1
Steam rectified in the substantially axial direction from which water has been substantially separated is led to the outlet of 03.

A portion of the steam and water extracted by the outlet 105 are conducted via a line 130 to a return line 120 and further into holes 116 distributed circumferentially downstream of the fixed blade 102. It is then reintroduced into the mixture being separated.

In FIG. 2, a bell-shaped portion 140 is attached to the pipe 103, for example by welding, to prevent the pipe 130 from becoming clogged with water.
has been established. The bell-shaped portion 140 covers the entire circumference of the tube 103 at the same height as the conduit 130 . In the case of a multi-tank separator, only one tank is shown here, but in order to separate the tanks, each layer is separated by a cylindrical skirt portion 141 that partially has a truncated conical matrix shape. cover. The skirt portion 141 serving as a baffle plate is supported by screws 142 preferably arranged at three locations on the circumference.

FIG. 3 is a cross-sectional view of the device of FIG. 2 taken along the line --. Fixed wings 104 are not shown for clarity. From the center to the outer circumference, the tube 120,
Conduit 130, tube 103, bell 140, skirt 141 and threads 142 and tube 2 are shown.
The skirt portion 141 is fixed by six screws 142 arranged at 120° intervals on two different sides (FIG. 2) in each of the same planes. If the centrifugal separator is arranged horizontally, the skirt portion 141
may include a hole facing the drain port 109. These holes drain water accumulated at the bottom of the skirt portion 141.

FIG. 4 shows a modification of the return pipe 120.

FIG. 4 shows a return pipe 120, a pipe 100, and a fixed wing 102 fixed to the return pipe 120 and the pipe 100.
It is shown. The return pipe 120 has three parts 12
Consisting of 0A, 120B, 120'B, part 1
Of course, 20B and 120'B may be constructed as a single piece.

One end of portion 120A forms outer circular bearing surface 125, and one end of portion 120B forms inner circular bearing surface 1.
26 is formed. These two supporting surfaces 12
In the annular slit between 5 and 126 vanes 120C, clearly shown in FIG. Welded at an angle to the surface. Re-introduction route 1
16A is also shown in FIG.

In this example, the tips of portions 120B and 120'B are connected to portions 120B and 120'B in order to compensate for the increase in flow rate.
It has a reduced outer diameter with respect to A.

Of course, the outer diameter of section 120'B resumes the value of the diameter of section 120A near the inlet of tube 103.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of one specific example of the present invention, FIG. 2 is a vertical cross-sectional view of another specific example of the present invention, and FIG.
4 is a longitudinal sectional view of a modified example of the return pipe, and FIG. 5 is a sectional view taken along the line ``-'' in FIG. 4. 2,100,103...tube, 102,104...
... fixed wing, 105 ... outlet, 107 ... annular space, 120 ... return pipe, 130 ... conduit.

Claims (1)

[Claims] 1. A first tubular member through which a mixture of two objects having different densities flows from an inlet toward an outlet;
a fixed vane at the inlet of the first tubular member for swirling the mixture flowing through the first tubular member about the central longitudinal axis of the first tubular member; a second tubular member having one end disposed substantially coaxially with the first tubular member to receive an outlet of the first tubular member therein; a third tubular member disposed within the second tubular member and having one end inserted into the outlet of the first tubular member with a predetermined gap therebetween; the third tubular member, and one end is connected to the third tubular member to communicate with an annular space between the second tubular member and the third tubular member. a return pipe, the other end of which opens into the first tubular member between the fixed wing and the third tubular member in a direction between the radial direction of the first tubular member and the downstream direction; A centrifugal separator for a mixture consisting of: 2. A baffle plate having a truncated conical surface shape to cover one end of the return pipe member to prevent the mixture flowing in the annular space from directly entering the third tubular member The device according to claim 1, wherein the device is fixed to the outer peripheral surface of the device. 3. The device of claim 2, wherein a fourth tubular member is provided within the annular space, covering the outlet end of the first tubular member and the baffle plate. 4. The device according to claim 3, wherein the diameter of the return pipe member decreases downstream from the other end of the return pipe member. 5. A device according to any one of claims 1 to 4, wherein the other end of the return pipe member comprises an annular slit extending along the central longitudinal axis.