RU186784U1 - Coalescing element for the separation of water-oil mixture - Google Patents

Abstract

A useful model is a coalescing element for use in water purification devices from petroleum products.

The use of coalescing devices assembled from the proposed elements, allows to obtain the following technical results and advantages compared to other coalescers:

reduce hydraulic resistance to fluid flow caused by excessive bending of the transverse profile of the element;

ensure the stability of the process of formation and collection of the coalescence phase by using ribs located across the element and straightening the fluid flow, and forming coalescence zones;

to improve the assembly and operating conditions for coalescing elements using remote-centering elements / protrusions;

creation of conditions for additional collection and formation of a coalescent phase;

to increase the stability of the fluid flow by reducing its turbulence, by applying different angles of inclination of the lateral sides of the element, at the inlet and outlet of the flow. f-ly, 5 ill.

Description

Utility Model Description

The utility model relates to coalescing elements used in devices for purifying various waters from oil products, in particular to coalescers that separate oil particles from associated water in collection and preparation systems, and in reservoir pressure maintenance systems.

At present, in the oil industry, various coalescers are used to prepare associated produced water in the oil, gas and water collection system. For example, according to the patents RU / 116 147, C10G 33/06, 05.20.2012 /, and RU / 117 096, B01D 17/00, 20.06.2012 /. These devices use large-sized flat parallel plates and large-sized corrugated plates.

Coalescing devices are known in which sets or packages assembled from small-sized individual coalescing elements are used.

So there is a known method of separating a water-oil mixture according to the patent / US 4897206, BO1D 23/24, 01/30/1990 /, including supplying the mixture to the M-shaped element and the removal of oil through a ring connecting the symmetrical halves of the M-shaped element. Water is diverted through two lower holes located, each of which is located in the symmetrical halves of the M-shaped element.

The method and device according to this patent is not effective enough, since each M-shaped element of the method has openings for the drainage of not only the oil product, but also for the drainage of water.

The prototype of the claimed element is an M-shaped element for separating the emulsion according to patent RU / 2 618 857, BO1D 17/02, 05/11/2017 /, in which the symmetrical halves of the M-shaped element are interconnected by a ring to remove the dispersed phase, and in which the hole for the removal of the dispersed phase is made in the form of an annular protrusion, and the symmetrical halves of the M-shaped element are made integral.

The disadvantages of the prototype is the following.

The V-shaped hollow in the upper flange forms additional resistance to the fluid flow, and can lead to its turbulization, which will disrupt the coalescence process.

The symmetry of the M-shaped element of the prototype for a number of fluid flow modes is a drawback in terms of increased hydraulic resistance and the possibility of turbulization of the oil-water mixture flow. Turbulization of the flow leads to the opposite effect - mixing the oil-water mixture and the creation of stable emulsions, which can occur with a certain ratio of oil and water. To eliminate this drawback, it is advisable to tilt the sides of the element at different angles. In practice, the side at the outlet of the flow should have a smaller slope to the horizontal.

Also, in the prototype there may be instability of the process of formation and collection of the coalescence phase along the entire length of the element profile, especially when the fluid flows are close to turbulent. The reason for this is the lack of separate, not connected with each other, zones of coalescence. This disadvantage contributes to the absence of ribs located across the element and directing the flow of fluid.

The assembly-operational drawback of the elements of the prototype is the lack of remotely-centering elements / protrusions - which will lead to inaccuracies in the assembly-laying of coalescing elements in a package.

Another disadvantage of the prototype is the lack of a sufficient number and the necessary profile of the grooves / recesses for collecting and forming a coalescent phase under the upper shelf.

The problems solved by the proposed utility model are as follows.

Reduced hydraulic resistance to fluid flow caused by excessive bending of the transverse profile of the element.

Increasing the stability of the fluid flow - reducing its turbulence, using different angles of inclination of the side of the element at the inlet and outlet of the flow.

Ensuring a stable process of formation and collection of the coalescence phase using ribs that streamline and straighten the fluid flow and form coalescence zones.

Providing assembly and operating conditions for coalescing elements using remote-centering elements / protrusions.

Also, the problem solved by the proposed utility model is the creation of conditions for additional collection and formation of the coalescence phase.

The problem is solved in that the coalescing element for separating the oil-water mixture having holes for the removal of the coalescent phase, made in the form of an annular protrusion, characterized in that the element is made in a U-shape with the sides inclined to the vertical at an angle β, where 5 < β <85 degrees, and the angles of inclination of the sides and their lengths can be different, and to stabilize the fluid flow between the holes and along the edges of the element, ribs are arranged along the organized fluid flow and forming zones coalescent age, and for assembling and laying coalescing elements in the package on the upper face of horizontal shelves made remotely-centering stepped ledges / bushing, and for joining them to the lower face of the horizontal leg provided with protrusions / sleeves with stepped holes.

Also, the problem is solved by the fact that on the upper horizontal shelf of the element one or more recesses are made for additional collection and formation of a coalescent phase.

The proposed coalescing element and its operation are illustrated in FIG. 1-5.

The figures show:

1 - U-shaped coalescing element;

2 - hole for the removal of the cosalescent phase;

3 - coalescence zones of separated oil;

4 - ribs;

5 - annular protrusions of the holes;

6 - β ₁ - the angle of inclination of the side at the fluid inlet to the coalescing elements;

7 - β ₂ - the angle of inclination of the side at the outlet of the liquid from the coalescing elements;

8 - L ₁ is the length of the side at the fluid inlet to the coalescing elements;

9 - L ₂ - the length of the side at the outlet of the liquid from the coalescing elements;

10 - centering stepped protrusions on the upper edge of the horizontal shelf;

11 - centering stepped holes on the lower edge of the horizontal shelf;

12 - recesses.

Figure 1 shows a cross section of a coalescing U-shaped element 1 using different angles of inclination of the sides of the element. Where β ₁ and β _{2 are the} angles of inclination of the sides. Moreover, to reduce hydraulic resistance to fluid flow and prevent turbulization of the flow β ₂ > β ₁ .

Figure 2 shows a package of U-shaped elements 1, producing coalescence (separation) of oil from water. Separated oil particles are collected under a horizontal shelf in coalescence zone 3.

In Fig. 3, a longitudinal section of the coalescing element shows how, thanks to the ribs 4, these coalescence zones 3 are organized. The ribs are made along the fluid flow. The ribs, due to their height, also perform the functions of straightening (laminating) the flow.

In Fig. 4, in a longitudinal section of a coalescing element, distance-centering step ledges 10 are shown on the upper face of the horizontal shelf, and step bushings 11 with holes are shown on the lower face of the horizontal shelf. In this case, the assembly of the package of coalescing elements, and their presence in the fluid flow becomes stable due to the entry of the protrusions 10 into the stepped openings 11.

In FIG. 5, in cross section of the coalescing element, additional recesses 12 are shown for additional collection and formation of a coalescent phase in zones 3. There can be one or more additional recesses, the number determined by the width of the horizontal shelf. The dimensions (width) of the shelf, in turn, is determined by the coalescence modes, in particular, depending on the fluid flow rate. At high flow rates, a larger number of additional recesses is advisable, which increase the likelihood of trapping and coalescing oil particles.

The use of the claimed utility model allows to obtain the following technical results and advantages compared to the prototype:

reduce hydraulic resistance to fluid flow caused by excessive bending of the transverse profile of the element;

to ensure the stability of the process of formation and collection of the coalescence phase using ribs that streamline and straighten the fluid flow and form coalescence zones;

to improve the assembly and operating conditions for coalescing elements using remote-centering elements / protrusions;

creation of conditions for additional collection and formation of a coalescence phase;

to increase the stability of the fluid flow by reducing its turbulence, using different angles of inclination of the lateral sides of the element, at the inlet and outlet of the flow.

Claims (2)

1. Coalescing element for separating the oil-water mixture having openings for diverting the coalescent phase, made in the form of an annular protrusion, characterized in that the element is made in a U-shape with the sides inclined to the vertical at an angle β, where 5 <β <85 degrees, moreover, the angles of inclination of the sides and their lengths may be different, and to stabilize the fluid flow between the holes and along the edges of the element, ribs are made that are located along the organized fluid flow and form the zone of wheel ratio, and for assembly-laying oalestsiruyuschih elements in the package on the upper face of horizontal shelves made remotely-centering stepped ledges / bushing, and for joining them to the lower face of the horizontal leg provided with protrusions / sleeves with stepped holes. 2. The coalescing element according to claim 1, characterized in that one or more recesses are made on the upper horizontal shelf of the element for additional collection and formation of a coalescing phase.