JPS6133603B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a separator for separating two difficult-to-mix liquids of different concentrations that are mixed with each other and are in a continuous flow. It contains a decant chamber with an inlet opening between diagonally oriented walls.

This type of separator is described in US Pat. No. 1,920,468.

The object of the invention is more particularly to the 1977
On November 14th, the content of hydrocarbons in the effluent passing through the Intergovernmental Maritime Consultative Organization (IMCO) and discharged from locations and tanks housing machinery and equipment exceeds 100 ppm. In accordance with the specifications contained in resolution A397, which stipulates that
The object of the present invention is to provide a separator for separating hydrocarbons contained in water to be discharged, for example industrial water or ballast water to be discharged.

The separator of the present invention, which is based on the principle of natural decantation due to concentration differences, basically comprises two deflection plates, with the walls arranged one below the other, and the inlet facing the lower deflection plate. It is characterized by

Preferably, these deflection plates are respectively adjacent to and cooperate with two opposite walls of the chamber to form baffles.

According to another advantageous feature of the invention, the top of the lower deflection plate is arranged approximately at the same level as the bottom of the upper deflection plate.

Embodiments according to the invention will be described below, the description and the drawings of which will disclose other features of the separator according to the invention.

The separator shown diagrammatically in FIG. 1 is an enclosure 1 in which an inlet chamber 2, a transfer chamber 3 and an outlet chamber 4 are defined.

The entrance chamber 2 is equipped with two deflection plates 5 and 6.
A space 7 is formed between these deflection plates, and an inlet 8 opens into this space, through which the liquid to be treated is injected into the separator.

These deflection plates are inclined walls that are reversed with respect to the liquid injection direction and form identical or different opposing acute angles a and b with respect to this injection direction 9 (considered horizontal), in which case these acute angles are preferably is between 45° and 20°, even better is 35°.
between 25° and approximately 30° in an optimal manner.

Preferably, the bottom 10 of the upper deflection plate 5 is arranged at approximately the same height as the top 11 of the lower deflection plate 6, and the inlet 8 is arranged directly below the bottom 10.

The liquid to be treated is, for example, parastowater (heavy phase) containing hydrocarbons (light phase), which is separated until the hydrocarbon content of the water is reduced to an acceptable level before discharging the water into the sea. .

The main part of the separation is achieved by pouring gently into the inlet chamber 2 through a baffle.

In effect, the deflection plates 5, 6 and their respective adjoining chamber walls 12, 13 still contain an emulsion of the light phase and an upper outlet section 14 from which the separated light phase is discharged towards the top of the inlet chamber. It constitutes a baffle plate having a lower outlet section 15 from which the heavy phase is discharged downward. The light phase that accumulates at the top of chamber 2 can be evacuated by suitable means (arrow 16
), while the heavy phase (the path of which is indicated diagrammatically by arrow 17 ) is sent to the transfer chamber 3 .

The chamber 3, located lower than the inlet chamber, is provided with means for promoting the coalescence of the light phase emulsion still contained within the heavy phase, these means being e.g. horizontal or sloping (as seen in cross section)
It is simply constructed by the fin device 18. The fins are slightly spaced apart from each other, for example by less than 10 mm, which is sufficient spacing for a suitable volume of liquid. By way of example, a spacing of 7 mm is suitable for a flow rate of 500/h.

The fins have the effect of increasing the contact area with the fluid and reducing the distance over which the light phase can be gently dripped. These will naturally rise and be added to the fins placed directly below. It will coalesce into one another at the surface of the fins and, when fully saturated, will release the light phase to the outlet in the form of large droplets, which will be easily transferred to the outlet stage.

The outlet stage or chamber 4 is provided with a light phase outlet 19 at the top and a heavy phase outlet 20 at the bottom, preferably with a screen 21 placed between the combining chamber 3 and the outlet 20 so that the outlet is a direct extension of the fins. This produces a vertical velocity reversal that is favorable for decanting.

FIG. 1 is a basic diagram when the device is simply regarded as a prismatic device having a rectangular chamber. 2 to 4 relate to a cylindrical device.

The cylindrical embodiment shown in FIGS. 2 to 4 has special features.

This device has two parts defining an annular space between them.
It consists of two vertical cylindrical walls 22 and 23.

An inlet 26 for the liquid to be treated opens in the upper part of the annular space below the collar 24 adjacent to the outer cylindrical wall 22 and facing the collar 25 adjacent to the inner cylindrical wall 23 . Said collar, consisting of two halves of a truncated cone (see FIG. 4), each performs the function of the deflection plates 5, 6 of the embodiment of FIG.

The overlapping phase descends into the lower region of the annular space on one side of the vertical partition wall 27 and runs horizontally towards the other side of this partition wall and is constituted by a semicircle and is formed by the fins 18 of the embodiment of FIG. It passes through a set of horizontal fins 28 which perform the functions of . When the liquid reaches the other side of the partition wall 27, it enters a pipe 29 whose inlet is at the bottom of the annular space. The progression of the partition wall 27 from one side to the other is illustrated diagrammatically by curve 30 in FIG.

The pipe 29 opens out from within the space 31 enclosed by the inner wall 23 and the light phase is discharged through the top outlet 33 when the heavy phase is discharged through the bottom outlet 32 . Space 31 constitutes an exit chamber.

Furthermore, the light phase separated by the action of the collars 24, 25 is extracted through the outlet 34 at the top of the annular space.

The light phase outlets 33 and 34 can also be placed under the control of valves 35, 36 actuated by level detectors 37 and 38.

Figure 4 simply shows walls 22 and 23, collars 24 and 2.
5 shows several fins 28, a vertical partition wall 27 and another vertical partition wall 39 with a collar emerging from this partition wall 27 terminating opposite it.

It should be noted that the coalescing chamber is of a particularly simple design and does not have the disadvantages of devices with coalescing cartridges. This is possible because most of the hydrocarbons have been separated out in the decanterizer, and only a mixture containing a small hydrocarbon residue has to be processed.

For example, a mixture containing 25% by weight hydrocarbons in water injected through the inlet of a device according to the invention will result in a heavy phase (water) containing less than 50 ppm hydrocarbons by weight after passing through the device.

If this mixture were sent directly to the coalescence chamber,
Operation of this chamber will be stopped.

The invention is not limited to the embodiments described herein.

[Brief explanation of the drawing]

FIG. 1 is a basic diagram of a separator according to the present invention, FIG. 2 is a longitudinal cross-sectional view showing an embodiment of the separator according to the present invention, and FIG. 3 is a view of the separator shown in FIG. FIG. 4 is a perspective view of the separator of FIG. 2 showing only some of its elements. In the figure, 2 is an inlet chamber, 3 is a transfer chamber, 4 is an outlet chamber, 5 and 6 are deflection plates, 7 is an annular space, 8 is an inlet,
9 is the injection direction, 10 is the bottom, 11 is the top, 12,
13 is a wall, 18 is a fin, 22 and 23 are cylindrical walls,
24 and 25 are collars, and 27 is a partition wall.

Claims (1)

[Scope of Claims] 1. Consists of a decanting chamber having two opposing walls, said decanting chamber comprising two internal deflecting walls, one of which is arranged below the other, and one of said deflecting walls is connected to said two opposing walls. and the other of said deflection walls obliquely abuts the other of said two opposing walls, said opposing wall and said deflection wall cooperating to form a passageway having a bottom outlet and a top outlet; The chamber is provided with an inlet for injecting the liquid to be treated, the inlet opening towards the passageway, and the direction of injection being directed towards the lower one of the deflecting walls. Mixed two-liquid phase separation device. 2. The device for separating two immiscible liquid phases of different concentrations as claimed in claim 1, wherein the top of the lower deflection wall is at approximately the same level as the bottom of the upper deflection wall. 3. The deflection walls of different concentrations according to claim 1, characterized in that the deflection walls consist of inclined walls reversed with respect to the liquid injection direction and form opposite acute angles that are the same or different from this direction. A device for separating two liquid phases that are difficult to mix. 4. The device for separating two immiscible liquid phases of different concentrations as claimed in claim 3, wherein each of the acute angles is between 45 degrees and 20 degrees. 5. The device for separating two liquid phases with different concentrations that are difficult to mix, as claimed in claim 3, wherein each of the acute angles is between 35 degrees and 25 degrees. 6. The device for separating two immiscible liquid phases of different concentrations as claimed in claim 3, wherein each of the acute angles is approximately 30 degrees. 7. The device for separating two liquid phases with different concentrations that are difficult to mix according to claim 1, wherein the opposing wall has a substantially planar shape. 8. The device for separating two liquid phases with different concentrations that are difficult to mix, as set forth in claim 1, wherein the deflecting wall is a portion having a conical shape. 9. Claim 2, wherein the inlet is located directly below the bottom of the upper deflection wall.
The device for separating two liquid phases that are difficult to mix and have different concentrations according to item 1, 3, or 4. 10. Claim 7, wherein the inlet is located directly below the bottom of the upper deflection wall.
The device for separating two liquid phases that are difficult to mix and have different concentrations according to item 8 or 8. 11. Claims 1, 2, or 11 comprising a coalescing chamber including coalescing means for receiving the heavy phase from the decanting chamber and producing a light phase with a heavy phase to be further coalesced. The device for separating two liquid phases that are difficult to mix and have different concentrations according to item 3. 12 a coalescing chamber comprising coalescing means for receiving the heavy phase from said decanting chamber and producing a light phase with a heavy phase to be further coalesced, wherein said coalescing means extend substantially along a horizontal axis; Claim 1, characterized in that it consists of parallel plates of
The device for separating two liquid phases with different concentrations that are difficult to mix, as described in item 1, item 2, or item 3. 13 consisting of a coalescing chamber comprising coalescing means for receiving the heavy phase from said decanting chamber and producing a light phase with a heavy phase to be further coalesced, in which case said coalescing means are arranged one above the other; The device for separating two liquid phases with different concentrations that are difficult to mix, as set forth in claim 1, 2, or 3, characterized in that the device comprises a set of disc-shaped plates. 14 consisting of a coalescing chamber containing coalescing means for receiving the heavy phase from said decanting chamber and producing a light phase with a heavy phase to be further coalesced, and further comprising an outlet chamber receiving liquid from said coalescing chamber. An apparatus for separating two difficult-to-mix liquid phases of different concentrations according to claim 1, 2, or 3, characterized in that: 15 consisting of a coalescing chamber containing coalescing means for receiving the heavy phase from said decanting chamber and producing a light phase with a heavy phase to be further coalesced, and further comprising an outlet chamber receiving liquid from said coalescing chamber. , in which case said outlet chamber is arranged in a space surrounded by a cylindrical wall, and said cylindrical wall is surrounded by another cylindrical wall forming an annular space with it, in which case said annular space is The upper part constitutes the decanting chamber, and the lower part of the annular space constitutes the merging chamber, and has opposing first and second partition walls in the annular space, the first partition wall being substantially at the same height and with said second partition wall in its upper part, so that said decanting chamber is defined within said annular space and between said first and second vertical partition walls, and said merging chamber is defined in said annular space and between said first and second vertical partition walls. Different concentrations according to claim 1, 2 or 3, characterized in that they are defined in the annular space by a first partition wall and below the second partition wall. Two-liquid phase separation device that is difficult to mix.