RU2456051C1 - Separator of immiscible light- and heavy-phase different-density fluids - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to separation of immiscible fluids and may be used in oil-and-gas, petroleum and chemical machine building. Proposed device comprises casing, separated phases accumulating compartments, mix inlet branch pipes and those of discharging different-density liquid phases, settling zone with thin-layer modules of parallel coalescing elements made up of lengthwise inclined webs with convex and concave flutes directed toward inclination of webs arranged one above the other. Paired and opposed rectangular webs with jointed flanges are arranged along surfaces of adjoining webs and sheets along gas mix flow. Flanges are jointed by retainers to allow adjusting the distance between adjacent inclined webs.

EFFECT: higher efficiency of separation.

8 cl, 9 dwg

Description

The invention relates to gas, oil, oil refining and chemical engineering, it can be used in the separation of immiscible liquids of different densities, for example hydrocarbon liquids and aqueous solutions of methanol or glycols, including in the presence of a gas, solid particles in the separated mixture. It can be used in installations for the preparation of natural and associated petroleum gas, for the processing of gas condensate, for example, in plants for low-temperature separation and condensation.

Known sump for the separation of immiscible liquids of different densities (RF patent No. 1610614, MKI: B01D 17/02, priority 01/05/1989), containing:

- housing with a zone of sludge;

- compartments for collecting heavy and light liquids;

- nozzles for the inlet of the mixture and the output of the separated phases,

- a chipper of a drop liquid from gas.

The disadvantages of this apparatus is the low efficiency of phase separation. It is caused by the ineffective separation of the liquid mixture in the settling zone at a high deposition height of the separated phase, the entrainment of a droplet liquid with a sampled gas stream, because part of the gas passes into the gas outlet pipe bypassing the chipper, as well as the need to install a liquid phase separation regulator to prevent it from entering the pipe selection of heavy fluid light.

Known separator immiscible liquids (copyright certificate No. 1502046, MKI: B01D 17/02, priority 06.07.87). The separator contains a horizontal housing with nozzles for the inlet of the mixture and the output of the separated phases, a settling zone with a nozzle consisting of coalescing elements arranged in parallel and having the same length. Coalescing elements are made in the form of pipes or partitions arranged in rows one above the other along the generatrix of the apparatus body. The rows of coalescing elements are displaced relative to each other in the axial direction, and the displacement is made in height within the sections formed by inclined partitions.

The advantage of this apparatus is the reduction in the height of the deposition of heavy liquids and the emergence of light, additional enlargement of dispersed drops of liquid on the developed surface of coalescence.

The disadvantage of this separator is the movement of the separated phases in the coalescing elements from their input to the output without intermediate selection, which leads to repeated mixing of the phases in the elements and at the exit from them and from the sections. The offset of the rows of elements partially eliminates the mixing of the separated phases at the output of the elements, but complicates the design and mass of the apparatus. These shortcomings lead to a deterioration in the separation efficiency.

A known apparatus for separating dispersed liquid phases according to British patent No. 2150039, class. B01D 21/02 (prototype), comprising a housing with a thin-layer module housed in it of parallel coalescing elements made of sheets in the form of longitudinal inclined partitions with concave and convex gutters directed towards the inclination of the partitions and located one above the other. The gutters increase the rigidity of the longitudinal inclined partitions and provide differential selection of the heavy liquid phase along the concave grooves and the selection of the light liquid phase along the convex upward grooves.

The disadvantages of this device are:

- the impossibility of regulating the distance between the inclined partitions, and hence the deposition height, i.e. reduce the time of separation of liquid phases and reduce the dimensions of the apparatus;

- insufficient rigidity of the plates, especially for large-diameter apparatuses and when installing them with an inclination from the vertical of more than 45 degrees, when the deposition height is minimal, which requires an increase in the thickness of the partitions and, consequently, an increase in material consumption;

- the inability to separate the liquid in the presence of a third phase - gas.

The technical result is as follows:

- improving the separation efficiency of immiscible dispersed liquid phases with different densities;

- expanding the range of effective operation of the separator;

- increased separator performance;

- increasing the efficiency of the separation of the gas stream from the droplet liquid:

- improving the reliability and strength of the thin-layer module;

- simplification of mounting and dismounting of a thin-layer module through a manhole;

- reducing the length of the settling zone, when changing the technological parameters of the shared mixture;

- alignment of flows along the cross-section of the separator.

To achieve the specified technical result in a separator of immiscible liquids, including a housing, compartments for collecting separated phases, nozzles for mixture inlet and outlet for separated liquid phases of different densities, a settling zone with thin-layer modules made of parallel coalescing elements made of sheets in the form of longitudinal inclined walls with concave and convex grooves directed towards the inclination of the partitions located one above the other, while along the surfaces of adjacent inclined partitions facing to each other, paired rectangular corners are fixed, with shelves in contact, which are installed along the sheets in the direction of flow of the shared gas mixture, while the contacting shelves are interconnected by clamps, by fixing them in one of a number of transverse holes made in the contacting shelves.

Shelves of rectangular corners are located one above the other on different sides of the surfaces of the inclined partition.

Inclined partitions are provided with corners installed between convex and (or) concave grooves.

Groups of convex grooves alternate with groups of concave grooves.

The upper surface of each inclined septum is hydrophilic, and the lower surface is leophilic.

Thin-layer modules are limited from movement by stops fixed on the inner wall of the housing.

In the housing in front of the thin-layer modules and (or) the collection compartment for the light liquid phase, a separation nozzle is installed connected to the inner wall of the housing, behind which there is a gas extraction fitting.

An inclined support is located in the housing under the thin-layer module.

Fastening along the surfaces of adjacent inclined partitions facing each other, paired rectangular corners with adjoining shelves that are installed along sheets in the direction of flow of the mixture to be separated, connecting adjoining shelves to each other with clamps, by fixing them in one of a number of transverse holes made in adjoining shelves, allows you to change the distance between the inclined shelves, i.e. the height of the deposition and / or ascent of dispersed droplets, and therefore, increase the efficiency of separation of a liquid mixture of light and heavy phases with different densities, reduce the length of the settling zone, when changing the technological parameters of the separated mixture, or increase the performance of the separator.

The location of the corners on different sides of the surfaces of the inclined partition under each other increases the rigidity of the thin-layer module without deflection of the inclined partitions.

The establishment of angles between groups of convex and (or) concave grooves, which are equipped with inclined partitions in the direction of inclination, that is, on flat surfaces with minimal stiffness, eliminated the deflection of inclined partitions and increased rigidity and strength of the thin-layer module even when making inclined partitions of thin sheets at installing a thin-layer module in any configuration of the cross section of the apparatus.

The arrangement of convex gutters in series with each other in groups and the alternation of groups of convex gutters with groups of concave gutters made it possible to discrete uniformly continuously select the light and heavy separated phases along the length of the partition depending on the ratio of the liquid phases and thereby improved the efficiency of the liquid separation process.

The implementation of the upper surface of each inclined septum hydrophilic, and the bottom surface - leophilic, allowed to wet and hold the light liquid phase in the upper part of the volume, and the heavy (water) liquid phase in the lower part between the inclined partitions without mixing.

Fixing the thin-layer modules with stops on the inner wall of the housing made it possible to fix and restrict them from moving and to provide the possibility of assembling thin-layer modules from sections with dimensions that allow the sections to be mounted and dismounted through a manhole.

The installation in the casing in front of the thin-layer modules and (or) the collection compartment for the light liquid phase of the separation nozzle adjacent to the inner wall of the casing, behind which the gas extraction nozzle is located (s), it was possible to simultaneously degass the shared liquid mixture, separate all gas from the dropping liquid, and equalize the speeds flows in the separator body and around the perimeter of the transfer partition of the light liquid phase collection compartment.

The location in the housing under the thin-layer module of the inclined support made it possible to create rigidity for the lower inclined partition, on which the remaining partitions are supported successively in height.

Applicants and authors are not aware of the prior art separators of immiscible liquids in which increasing the efficiency of the liquid separation process, expanding the effective range of the separator, increasing the efficiency of the separator, increasing the efficiency of separation of the gas stream from the droplet liquid, increasing the reliability, strength and unification of the thin-layer module, simplifying installation and dismantling of a thin-layer module, including through a manhole, alignment of flows across the cross section The bodies would be achieved in the manner proposed.

1 shows a separator of immiscible liquids, a longitudinal section.

Figure 2 is a section aa in figure 1.

Figure 3 is a view of B in figure 2

Figure 4 is a view In figure 2.

Figure 5 shows the location of paired rectangular corners between inclined partitions with a horizontal arrangement of adjoining shelves of corners.

In Fig.6 is a section GG in Fig.5.

Fig.7 is a view of D in Fig.5

On Fig shows a variant of the arrangement of paired rectangular corners between the inclined partitions with an inclined arrangement of the contacting shelves of the corners.

In Fig.9 is a view of E in Fig.8.

The separator immiscible liquids of light and heavy phases with different densities (figure 1) contains: housing 1; mixture inlet pipe 2 located in the upper part of the housing 1; distributor-degasser 3; separation nozzle 4; nozzles 5, 6, output light and heavy phases, respectively, located in the lower part of the housing 1; gas outlet pipe 7; settling zone 8, with thin-layer modules 9, consisting of inclined partitions 10 (figure 2), which in each module can be tilted in different directions and equipped with groups of troughs 11 (figure 3) for the heavy liquid phase and groups of troughs 12 for light liquid phase; compartment for collecting light phase 13 (figure 1); heavy phase compartment 14.

The inclined partitions 10 of the thin-layer module 9 are installed at an angle of 30 ÷ 50 degrees to the horizontal of the housing 1.

Each inclined partition 10 is provided with groups of grooves 11, 12 (Fig. 3) located in the direction of its inclination, and the groups of grooves 11, 12, alternating, are concave on opposite sides of the surface of the inclined partitions 10. In the group of grooves 11, the grooves are made concave, and in group of gutters 12 - convex. On adjacent inclined partitions 10, the groups of gutters 11 and 12 are located under each other.

To reduce the length of the thin-layer module 9, it can be made of several sections 15 (figure 4).

Along the surfaces of adjacent inclined partitions 10 (Fig. 5) facing each other, paired rectangular corners 16, 17 (Figs. 5, 7, 8, 9) are fixed, with shelves 18, 19 in contact with each other (Figs. 5, 6 , 7, 8, 9), which are installed along the sheets 10 in the direction of flow of the liquid mixture to be divided, while the contacting shelves 18, 19 are interconnected by clamps 20 (Figs. 5, 6, 8, 9), which allow changing the distance between adjacent inclined partitions, by securing them in one of a number of transverse holes 21 (figure 5, 7, 8, 9) made in adjoining shelves.

The corners 16, 17 on opposite sides of the surfaces of the inclined partition are installed in such a way that their contacting shelves 18, 19 are located one above the other.

On inclined partitions 10, angles 16, 17 are established between groups of convex 12 and (or) groups of concave 11 gutters.

The groups of convex and concave grooves 12 and 11 are arranged sequentially one after another in groups and alternate with each other.

The upper surface 22 (Fig.9) of each inclined septum 10 is made hydrophilic, and the lower 23 surface is leophilic.

Thin-layer modules 9 are limited from movement by stops 24 (Fig. 4), mounted on the inner wall of the housing 1.

In the housing 1, in front of the thin-layer module 9, a separation nozzle 4 is installed (Fig. 1), connected to the inner wall of the housing, behind which there is a gas extraction nozzle 7.

In the housing 1 under the thin-layer module 9 is an inclined support 25 (Fig.5, 8).

In front of the light phase collection compartment, an additional separation nozzle 26 may be installed to separate the gas from the liquid and equalize the flow of the light liquid phase flowing into the collection compartment 13.

The device operates as follows.

The gas-liquid mixture is fed through the pipe 2 (Fig. 1) to the distributor-degasser 3, with which it is distributed in the settling zone 8 through a separation nozzle 4 located in front of the thin-layer module 9, also installed in the settling zone 8. A thin-layer module 9, consisting of inclined partitions 10, installed at an angle of 30 ÷ 50 degrees to the horizontal, divides the total shared flow of the liquid mixture into many thin-layer flows between inclined partitions 10, which are equipped with groups of troughs convex 12 and concave 11. Connection the contact of the shelves 18, 19 with each other by the clamps 20 by fixing them in one of a number of transverse holes 21 made in the contacting shelves, allows you to change the distance between the inclined partitions 10, that is, the height of the deposition and (or) ascent of the dispersed drops, and therefore reduce the length of the settling zone when changing the technological parameters of the shared mixture or to increase the performance of the separator. Under the influence of gravity, the heavy liquid phase, passing between the inclined partitions 10, settles, wetting the upper hydrophilic part of the inclined partitions 10, gathers in a group of grooves, concave down 11, along which flows into the lower part of the housing 1, and then flows into the compartment for collecting heavy the liquid phase 14, from where the heavy liquid phase is discharged through the nozzle 6. The light liquid phase floats at a reduced height due to the possibility of changing the distances between the partitions for a specific shared mixture and the physical properties of the separation of liquid phases and between inclined partitions 10 rises, moistens the lower leophilic part of partition 10, collects in a group of troughs curved up 12, along which it rises to the upper part of the settling zone of the separator, and flows into the compartment for collecting the light phase 13, from which it is removed through the outlet pipe of the light phase 5. The gas released as a result of degassing on the distributor-degasser 3 is separated from the liquid phase on the nozzles 4, 26 and is removed through the gas outlet pipe 7.

Thus, fixing along the surfaces of adjacent inclined partitions facing each other, paired rectangular corners with adjoining shelves that are installed along the sheets in the direction of flow of the shared gas mixture, and connecting the adjoining shelves to each other with clamps, providing the ability to change the distance between adjacent inclined partitions, by fixing them in one of a number of transverse holes made in contacting shelves, as well as the establishment of corners on different sides of the surfaces of the inclined partition so that their shelves are located one under the other, supplying the inclined partitions with corners installed between convex and (or) concave grooves, alternating a group of convex grooves with groups of concave grooves, making the upper surface of each inclined partition hydrophilic, and the lower surface is leophilic, restriction on the movement of thin-layer modules with stops fixed on the inner wall of the housing, installation in the housing in front of the thin-layer modules and and (or) a compartment for collecting light liquid phase separation nozzles connected to the inner wall of the housing, behind which the gas extraction fitting is located (s), the location of the inclined support in the housing under the thin-layer module made it possible to provide a technical result, which consists in increasing the efficiency of separation of immiscible dispersed liquid phases with different densities, expanding the effective range of the separator, increasing the performance of the separator, increasing the efficiency of separation of the gas stream from the droplet liquid, reliability and durability of the thin-layer module, simplifying the installation and dismantling of the thin-layer module through the manhole, reducing the length of the settling zone, aligning the flows along the cross-section of the separator.

Claims (8)

1. Separator of immiscible liquids of light and heavy phases with different densities, including a housing, compartments for collecting separated phases, nozzles for mixture inlet and outlet for separated liquid phases of different densities, a settling zone with thin-layer modules made of parallel coalescing elements made of sheets in the form of longitudinal inclined partitions with concave and convex gutters directed towards the inclination of the partitions located one above the other, characterized in that along the surfaces of adjacent inclined partitions facing paired rectangular corners with mutually adjoining shelves, which are installed along sheets in the direction of flow of the shared gas mixture, are fixed to each other, while the adjoining shelves are interconnected by clamps, by fixing them in one of a number of transverse holes made in the contacting shelves. 2. The separator of immiscible liquids according to claim 1, characterized in that the shelves of rectangular corners are located one above the other on different sides of the surfaces of the inclined partition. 3. The separator immiscible liquids according to claim 1, characterized in that the inclined partitions are provided with corners installed between the convex and / or concave grooves. 4. The separator immiscible liquids according to claim 1, characterized in that the groups of convex gutters alternate with groups of concave gutters. 5. The separator immiscible liquids according to claim 1, characterized in that the upper surface of each inclined septum is made hydrophilic, and the lower surface is leophilic. 6. The separator immiscible liquids according to claim 1, characterized in that the thin-layer modules are limited from movement by stops fixed on the inner wall of the housing. 7. The separator of immiscible liquids according to claim 1, characterized in that a separation nozzle is installed in the housing in front of the thin-layer modules and / or the compartment for collecting the light liquid phase, connected to the inner wall of the housing, behind which there is a gas extraction fitting. 8. The separator of immiscible liquids according to claim 1, characterized in that an inclined support is located in the housing under the thin-layer module.

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