Liquid acid hydrocarbon three-phase separation device

Abstract

The utility model relates to a liquid acid hydrocarbon three-phase separation device. The liquid acid hydrocarbon three-phase separation device comprises a compressor, a vertical separation tank, an acid hydrocarbon coalescence separation element, a gas phase hydrocarbon separation assembly and a liquid phase hydrocarbon separation assembly, wherein the acid hydrocarbon coalescence separation element, the gas phase hydrocarbon separation assembly and the liquid phase hydrocarbon separation assembly are arranged in the vertical separation tank at intervals from top to bottom. The separation device disclosed by the utility model has the three-phase separation function of gas-phase hydrocarbon, liquid-phase hydrocarbon and liquid-phase acid, can complete rapid heat removal and efficient separation of liquid acid hydrocarbon obtained by liquid acid alkylation, and is compact in equipment structure, low in investment, small in occupied area and large in treatment capacity of single equipment.

Description

Technical Field

[0001] The present disclosure relates to the technical field of acid-containing hydrocarbon gas-liquid separation, and particularly to a liquid acid-hydrocarbon three-phase separation device. Background Art

[0002] In the process of petroleum refining, the alkylation of isobutane and butene (or a mixture of propylene, butene, and pentene) to produce alkylate is an important process for refinery gas processing. Alkylate is a mixture mainly composed of C8 branched-chain alkanes without olefins and aromatics, almost sulfur- and nitrogen-free, with low sensitivity and vapor pressure, and is a clean and ideal high-octane gasoline blending component.

[0003] Existing alkylation units mainly adopt sulfuric acid alkylation process and hydrofluoric acid alkylation process. Since the safety of sulfuric acid alkylation technology is better than that of hydrofluoric acid method, most of the newly built alkylation units in the past 20 years have adopted sulfuric acid process, which has become the mainstream alkylation technology selected by today's refinery enterprises.

[0004] In the liquid acid alkylation process, the reaction effluent is a mixture of liquid acid and hydrocarbons. Depending on the process, the liquid acid content is between 40% - 60% (volume ratio). Some liquid acid alkylation processes use self-vaporization to remove heat, and the reaction effluent needs to be efficiently separated into acid and hydrocarbon phases. The separated acid phase and most of the hydrocarbon phase are returned to the reactor to continue the reaction, while a small part of the hydrocarbon phase is sent to the downstream refining system for further acid removal treatment. Existing liquid acid-hydrocarbon separation devices cannot achieve efficient three-phase separation in an integrated device. Summary of the Utility Model

[0005] The purpose of the present disclosure is to provide a liquid acid-hydrocarbon three-phase separation device, which has the function of separating gas-phase hydrocarbon, liquid-phase hydrocarbon, and liquid-phase acid, can complete the rapid heat removal and efficient separation of the liquid acid-hydrocarbon obtained by liquid acid alkylation, and has a compact equipment structure, low investment, small floor area, and large processing capacity per single equipment.

[0006] To achieve the above purpose, the present disclosure provides a liquid acid-hydrocarbon three-phase separation device, which includes a vertical separation tank, and an acid-hydrocarbon coalescence separation element, a gas-phase hydrocarbon separation component, and a liquid-phase hydrocarbon separation component that are arranged at intervals from top to bottom inside the vertical separation tank;

[0007] The gas-phase hydrocarbon separation component includes a first housing and a gas-liquid acid-hydrocarbon coalescence element. The first housing covers the inner wall of the vertical separation tank to form a first cavity. The first housing is provided with a gas-liquid acid-hydrocarbon coalescence element, so that the first cavity is only communicated with the inner space of the vertical separation tank through the gas-liquid acid-hydrocarbon coalescence element; the outlet of the gas-phase hydrocarbon separation component is communicated with the first cavity and extends out of the side wall of the vertical separation tank to form a gas-phase hydrocarbon outlet;

[0008] The liquid-phase hydrocarbon separation component includes a second housing and a liquid-liquid acid-hydrocarbon coalescing element. The second housing covers the inner wall of the vertical separation tank to form a second cavity. The second housing is provided with a liquid-liquid acid-hydrocarbon coalescing element, so that the second cavity is communicated with the inner space of the vertical separation tank only through the liquid-liquid acid-hydrocarbon coalescing element; the outlet of the liquid-phase hydrocarbon separation component is communicated with the second cavity and extends out of the side wall of the vertical separation tank to form a liquid-phase hydrocarbon outlet.

[0009] A liquid acid-hydrocarbon inlet and a liquid acid-phase outlet are further arranged on the housing of the vertical separation tank. The liquid acid-hydrocarbon inlet is located above the acid-hydrocarbon coalescing and separating element, and the liquid acid-phase outlet is located below the liquid-phase hydrocarbon separation component.

[0010] The liquid acid-hydrocarbon three-phase separation device further includes a compressor, and the inlet of the compressor is communicated with the gas-phase hydrocarbon outlet.

[0011] Optionally, the gas-liquid acid-hydrocarbon coalescing element is arranged at the bottom of the first cavity; the liquid-liquid acid-hydrocarbon coalescing element is arranged at the bottom of the second cavity.

[0012] The gas-liquid acid-hydrocarbon coalescing element includes a stainless steel wire mesh, and the wire mesh density of the stainless steel wire mesh is 110-190 kg / m 3 ;

[0013] The liquid-liquid acid-hydrocarbon coalescing element includes a low-pressure-drop plate structured packing.

[0014] Optionally, a distribution component is further arranged inside the vertical separation tank, and the distribution component is arranged above the acid-hydrocarbon coalescing and separating element.

[0015] The distribution component includes a liquid acid-hydrocarbon distributor and a liquid acid-hydrocarbon distribution tray which are arranged at intervals up and down.

[0016] The inlet of the liquid acid-hydrocarbon distributor is communicated with the liquid acid-hydrocarbon inlet.

[0017] The distance L4 between the liquid acid-hydrocarbon distribution tray and the liquid acid-hydrocarbon distributor in the axial direction of the vertical separation tank is 200-2000 mm.

[0018] Optionally, the liquid acid-hydrocarbon distributor includes a branched pipe, the branched pipe includes a main pipe and a plurality of branch pipes connected to the main pipe, the inlet of the main pipe is communicated with the liquid acid-hydrocarbon inlet, a plurality of outlets are arranged on the branch pipes, and the plurality of outlets face upward and / or downward.

[0019] Optionally, the liquid acid-hydrocarbon distribution tray includes a sieve plate or a bubble cap plate, and the aperture ratio of the liquid acid-hydrocarbon distribution tray is 5-35%.

[0020] Optionally, a distance L1 between the acid hydrocarbon coalescence separation element and the top end of the vertical separation tank in the axial direction of the vertical separation tank is 10-40% of the total height of the vertical separation tank.

[0021] Optionally, the acid hydrocarbon agglomeration separation element comprises a filler or a corrugated plate;

[0022] The filler includes a wire mesh filler, and the wire mesh density of the wire mesh filler is 50-100 kg / m 3 .

[0023] Optionally, a distance L2 between the gaseous hydrocarbon outlet and the top of the vertical separation tank in the axial direction of the vertical separation tank is 20-60% of the total height of the vertical separation tank.

[0024] Optionally, a distance L3 between the liquid hydrocarbon outlet and the top of the vertical separation tank in the axial direction of the vertical separation tank is 50-80% of the total height of the vertical separation tank.

[0025] Optionally, the liquid acid phase outlet is arranged at the bottom of the vertical separation tank;

[0026] The liquid acid hydrocarbon three-phase separation device further comprises a vortex flow device arranged inside the vertical separation tank, and the outlet of the vortex flow device is connected to the liquid acid phase outlet.

[0027] Through the above technical solution, after the liquid acid hydrocarbon enters the vertical separation tank of the present disclosure, it enters the gas-liquid separation area. The compressor connected to the gas phase hydrocarbon outlet can reduce the pressure in the separation tank while extracting the gas phase hydrocarbon, promoting the self-vaporization of low-boiling point components in the liquid. At the same time, an acid hydrocarbon agglomeration separation element is set in the gas-liquid separation area to perform preliminary separation of the acid and hydrocarbon in the liquid acid hydrocarbon produced by liquid acid alkylation, and provide a place for vaporization. The gas-liquid two-phase reaches a heat transfer and mass transfer balance, and the reaction heat is removed by the vaporization of the light hydrocarbons in the liquid acid hydrocarbons themselves, so that the temperature of the liquid phase logistics is reduced, and the reaction heat is removed by direct heat exchange between the gas and liquid phases in the acid hydrocarbons, saving the investment in heat exchange equipment. The gas obtained by vaporization changes from downward flow to upward flow. After the upward flow, the gas phase flow rate decreases, which is conducive to the sedimentation of liquid droplets in the gas phase. The gas phase passes through the gas-liquid acid hydrocarbon coalescing element for further gas-liquid separation, and the gas phase hydrocarbon is extracted from the gas phase hydrocarbon outlet through a compressor; the mixed liquid phase settles in the separation tank and is layered due to different densities. The upper liquid phase passes through the liquid-liquid acid hydrocarbon coalescing element to block the acid entrained therein, and the liquid phase hydrocarbon at the separation is discharged through the liquid phase hydrocarbon outlet, and finally the three-phase separation of gas phase hydrocarbon, liquid phase hydrocarbon and liquid phase acid in the liquid acid hydrocarbon is achieved. The device disclosed in the present invention integrates the three-phase separation into a vertical container, and the equipment structure is compact, which is conducive to reducing equipment investment.

[0028] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0030] Figure 1 It is a structural schematic diagram of a liquid acid-hydrocarbon three-phase separation device disclosed in the present invention.

[0031] Description of Reference Numerals

[0032] 1: vertical separation tank; 2: maintenance inlet; 3: liquid acid hydrocarbon inlet; 4: liquid acid hydrocarbon distributor; 5: liquid acid hydrocarbon distribution plate; 6: acid hydrocarbon agglomeration separation element; 7: first shell; 8: gas-liquid acid hydrocarbon agglomeration element; 9: gas phase hydrocarbon outlet; 10: second shell; 11: liquid-liquid acid hydrocarbon agglomeration element; 12: liquid phase hydrocarbon outlet; 13: liquid acid phase outlet; 14, vortex device. DETAILED DESCRIPTION

[0033] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0034] In the description of the present invention, it should be understood that terms such as "front", "rear", "left", "right", "up", "down", "top", and "bottom" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate that the device or component must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] like Figure 1As shown, the present disclosure provides a liquid acid hydrocarbon three-phase separation device, which includes a vertical separation tank 1, and an acid hydrocarbon coalescence separation element 6, a gas-phase hydrocarbon separation component, and a liquid-phase hydrocarbon separation component that are arranged at intervals from top to bottom inside the vertical separation tank 1;

[0037] The gas-phase hydrocarbon separation component includes a first housing 7 and a gas-liquid acid hydrocarbon coalescence element 8. The first housing 7 covers the inner wall of the vertical separation tank 1 to form a first cavity. The first housing 7 is provided with a gas-liquid acid hydrocarbon coalescence element 8 so that the first cavity is only communicated with the inner space of the vertical separation tank 1 through the gas-liquid acid hydrocarbon coalescence element 8; The outlet of the gas-phase hydrocarbon separation component is communicated with the first cavity and extends out of the side wall of the vertical separation tank 1 to form a gas-phase hydrocarbon outlet 9;

[0038] The liquid-phase hydrocarbon separation component includes a second housing 10 and a liquid-liquid acid hydrocarbon coalescence element 11. The second housing 10 covers the inner wall of the vertical separation tank 1 to form a second cavity. The second housing 10 is provided with a liquid-liquid acid hydrocarbon coalescence element 11 so that the second cavity is only communicated with the inner space of the vertical separation tank 1 through the liquid-liquid acid hydrocarbon coalescence element 11; The outlet of the liquid-phase hydrocarbon separation component is communicated with the second cavity and extends out of the side wall of the vertical separation tank 1 to form a liquid-phase hydrocarbon outlet 12;

[0039] A liquid acid hydrocarbon inlet 3 and a liquid acid phase outlet 13 are further provided on the housing of the vertical separation tank 1. The liquid acid hydrocarbon inlet 3 is located above the acid hydrocarbon coalescence separation element 6, and the liquid acid phase outlet 13 is located below the liquid-phase hydrocarbon separation component;

[0040] The liquid acid hydrocarbon three-phase separation device further includes a compressor, and the inlet of the compressor is communicated with the gas-phase hydrocarbon outlet 9.

[0041] In the present disclosure, the shapes of the first housing 7 and the second housing 10 are not specifically limited, and they can be of any shape, including but not limited to being composed of baffles.

[0042] In the present disclosure, the "top of the vertical separation tank" refers to the height range of 0 to 10% from top to bottom along the axial direction of the vertical separation tank, and the "bottom of the vertical separation tank" refers to the height range of 90 to 100% from top to bottom along the axial direction of the vertical separation tank.

[0043] According to an embodiment of the present disclosure, the liquid acid hydrocarbon inlet 3 is arranged at the top of the vertical separation tank 1.

[0044] According to an embodiment of the present disclosure, the gas-liquid acid-hydrocarbon coalescing element 8 is disposed at the bottom of the first cavity; the gas obtained by vaporizing the low-boiling components in the liquid acid-hydrocarbon phase passes through the gas-liquid acid-hydrocarbon coalescing element 8 to block the droplets entrained in the gas phase, and the separated gas is led out of the device through the gas-phase hydrocarbon outlet 9; the liquid-liquid acid-hydrocarbon coalescing element 11 is disposed at the bottom of the second cavity, and the acid and hydrocarbon in the liquid phase collected in the device are stratified due to different densities. The upper liquid phase passes through the liquid-liquid acid-hydrocarbon coalescing element 11 to block the acid entrained therein, and the separated liquid-phase hydrocarbon is discharged from the device through the liquid-phase hydrocarbon outlet 12.

[0045] In order to shunt the gas and control the gas extraction speed, according to an embodiment of the present disclosure, a plurality of the gas-phase hydrocarbon separation components are provided inside the vertical separation tank 1, and a plurality of gas-phase hydrocarbon outlets are provided on the side wall. The plurality of gas-phase hydrocarbon separation components are connected to the plurality of gas-phase hydrocarbon outlets in a one-to-one correspondence, and the plurality of gas-phase hydrocarbon outlets are connected to a compressor; the number of the gas-phase hydrocarbon separation components can be, for example, 2 to 4.

[0046] According to an embodiment of the present disclosure, the gas-liquid acid-hydrocarbon coalescing element 8 includes a stainless steel wire mesh, and the wire mesh density of the stainless steel wire mesh is 110-190 kg / m 3 , and the gas-liquid acid-hydrocarbon coalescing element having the above structure can block the droplets entrained in the gas phase and improve the separation effect.

[0047] According to an embodiment of the present disclosure, the liquid-liquid acid-hydrocarbon coalescing element 11 includes a low-pressure-drop plate-type structured packing, which reduces the resistance when the liquid passes through the liquid-liquid acid-hydrocarbon coalescing element, reduces the pressure drop in the device, and can also increase the contact area between the liquid and the liquid-liquid acid-hydrocarbon coalescing element, and improve the separation efficiency of the acid in the liquid-phase hydrocarbon.

[0048] According to an embodiment of the present disclosure, a distribution component is further provided inside the vertical separation tank 1, and the distribution component is disposed above the acid-hydrocarbon coalescing and separating element 6; the distribution component includes a liquid acid-hydrocarbon distributor 4 and a liquid acid-hydrocarbon distribution tray 5 arranged at intervals up and down; the inlet of the liquid acid-hydrocarbon distributor 4 is connected to the liquid acid-hydrocarbon inlet 3; the liquid acid-hydrocarbon distribution tray 5 can be horizontally fixed on the inner wall of the vertical separation tank 1; the liquid acid-hydrocarbon distributor 4 can initially distribute the liquid acid-hydrocarbon obtained by alkylating the liquid acid entering the device through the liquid acid-hydrocarbon inlet 3, avoiding overly concentrated impact on the liquid acid-hydrocarbon distribution tray 5, and the liquid acid-hydrocarbon distribution tray 5 can further distribute the liquid acid-hydrocarbon to uniformly distribute it to the acid-hydrocarbon coalescing and separating element 6 below, promoting the efficiency of subsequent separation.

[0049] In order to further promote the uniform distribution of liquid acid hydrocarbons and improve the separation efficiency, according to an embodiment of the present disclosure, the distance L4 between the liquid acid hydrocarbon distribution tray 5 and the liquid acid hydrocarbon distributor 4 in the axial direction of the vertical separation tank 1 is 200 - 2000 mm, so that the liquid acid hydrocarbons can be evenly distributed and enter the acid hydrocarbon coalescence separation element 6 below, improving the separation efficiency of acid and hydrocarbons; the distance between the liquid acid hydrocarbon distributor 4 and the top of the vertical separation tank 1 in the axial direction of the vertical separation tank 1 is 10 - 40% of the total height of the vertical separation tank 1; the liquid acid hydrocarbon distributor 4 can be located at the same horizontal position as the liquid acid hydrocarbon inlet 3.

[0050] According to an embodiment of the present disclosure, the liquid acid hydrocarbon distributor 4 includes a branched pipeline, the branched pipeline includes a main pipe and a plurality of branch pipes connected to the main pipe, the inlet of the main pipe is communicated with the liquid acid hydrocarbon inlet 3, a plurality of outlets are provided on the branch pipes, and the plurality of outlets face upward and / or downward for discharging the liquid acid hydrocarbons in the pipeline so as to distribute them onto the liquid acid hydrocarbon distribution tray below for further separation; at the same time, the downward-facing outlets can also discharge the liquid acid hydrocarbons in the pipeline after stopping the feeding, avoiding the influence of the liquid residue in the pipeline on the pipeline.

[0051] According to an embodiment of the present disclosure, the liquid acid hydrocarbon distribution tray 5 includes a sieve plate or a bubble cap plate, and the opening ratio of the liquid acid hydrocarbon distribution tray 5 is 5 - 35%; the liquid acid hydrocarbons are evenly distributed onto the acid hydrocarbon coalescence separation element below through the openings on the sieve plate or the bubble caps on the bubble cap plate, promoting the vaporization separation of low-boiling components.

[0052] According to an embodiment of the present disclosure, the distance L1 between the acid hydrocarbon coalescence separation element 6 and the top of the vertical separation tank 1 in the axial direction of the vertical separation tank 1 is 10 - 40% of the total height of the vertical separation tank 1, and the acid hydrocarbon coalescence separation element 6 can be horizontally fixed on the inner wall of the vertical separation tank 1; the acid hydrocarbon coalescence separation element is used for preliminarily separating the acid and hydrocarbons in the liquid acid hydrocarbons and providing a place for vaporization, enabling the gas-liquid two-phase to reach heat and mass transfer equilibrium, removing the reaction heat through the vaporization of the liquid acid hydrocarbons themselves, causing the temperature of the liquid-phase material flow to drop, and removing the reaction heat through the direct heat exchange between the gas-liquid two-phase in the acid hydrocarbons. The liquid flowing through the acid hydrocarbon coalescence separation element settles inside the separation tank and stratifies due to different densities. The above embodiment can promote the sufficient contact of the liquid acid hydrocarbons in the acid hydrocarbon coalescence separation element through the setting of specific structures, improving the gas-liquid separation efficiency.

[0053] According to an embodiment of the present disclosure, the acid hydrocarbon coalescence separation element 6 includes a packing or a corrugated plate; the packing includes a wire mesh packing, and the wire mesh density of the wire mesh packing is 50 - 100 kg / m 3The wire mesh filler can be formed by mixing non-metallic wires and metal wires. The non-metallic wires include one or more of glass fiber wires, polypropylene wires, polyvinylidene fluoride (PVDC) fiber wires and polytetrafluoroethylene (PTFE) fiber wires; the metal wires include one or more of 316L stainless steel, 904L stainless steel and alloy20 stainless steel. The present invention adopts a wire mesh filler made of the above materials as an acid-hydrocarbon agglomeration and separation element, which can effectively separate the acid-hydrocarbon phase; wherein the wire mesh density refers to the mass of the wire mesh per unit volume.

[0054] According to an embodiment of the present disclosure, a distance L2 between the gas-phase hydrocarbon outlet 9 and the top of the vertical separation tank 1 in the axial direction of the vertical separation tank 1 is 20-60% of the total height of the vertical separation tank 1 .

[0055] According to an embodiment of the present disclosure, a distance L3 between the liquid hydrocarbon outlet 12 and the top of the vertical separation tank 1 in the axial direction of the vertical separation tank 1 is 50-80% of the total height of the vertical separation tank 1 .

[0056] According to one embodiment of the present disclosure, the liquid acid phase outlet 13 is arranged at the bottom of the vertical separation tank 1; the liquid acid hydrocarbon three-phase separation device also includes a vortex collector 14 arranged inside the vertical separation tank 1, and the outlet of the vortex collector 14 is connected to the liquid acid phase outlet 13, which is used to discharge the separated liquid acid out of the separation tank.

[0057] According to one embodiment of the present disclosure, a maintenance inlet 2 is provided at the top of the vertical separator 1 .

[0058] According to one embodiment of the present disclosure, the liquid acid hydrocarbon three-phase separation device further includes a support for fixing the distribution assembly, the acid hydrocarbon coalescing separation element, the gas phase hydrocarbon separation assembly and the liquid phase hydrocarbon separation assembly.

[0059] According to a specific implementation of the present disclosure, the present disclosure is adopted Figure 1 The specific process flow of the liquid acid hydrocarbon three-phase separation device shown includes:

[0060] The liquid acid hydrocarbon obtained by alkylation of the liquid acid is introduced from the liquid acid hydrocarbon inlet 3 on the top side of the vertical separator 1, and first enters the liquid acid hydrocarbon distributor 4 for initial distribution of the medium, and then is evenly distributed to the acid hydrocarbon agglomeration separation element 6 below through the liquid acid hydrocarbon distribution plate 5 to perform preliminary separation of the liquid acid and hydrocarbon. The compressor connected to the gas phase hydrocarbon outlet can reduce the pressure in the separation tank while extracting the gas phase hydrocarbon, and realizes self-vaporization of the low boiling point component in the liquid in the three-phase separation space of gas phase hydrocarbon, liquid phase hydrocarbon and liquid phase acid below the liquid acid hydrocarbon distribution plate 5, and the low boiling point component is released. The point component is vaporized into gas phase to take away the heat of acid hydrocarbon, and changes from downward flow to upward flow, and the entrained liquid phase in the gas phase is blocked by the first shell 7 and the gas-liquid acid hydrocarbon agglomeration element 8 arranged on the inner wall below the acid hydrocarbon agglomeration separation element 6, and the obtained gas is led out through the gas phase hydrocarbon outlet 9; the liquid phase settles downward, gathers and stratifies, and the upper hydrocarbon phase reaches the position of the second shell 10 on the side, and passes through the liquid-liquid acid hydrocarbon agglomeration element 11 to block the mixed acid in the hydrocarbon phase, and then is led out from the liquid hydrocarbon outlet 12, and the lower acid phase passes through the vortex device 14 at the bottom and is led out from the liquid acid phase outlet 13.

[0061] The liquid acid hydrocarbon three-phase separation device disclosed in the present invention integrates the three-phase separation of gas phase hydrocarbon, liquid phase hydrocarbon and liquid phase acid in a vertical container, and can obtain a higher separation efficiency at the same time. The equipment has a compact structure, low investment, small footprint, and a large processing capacity of a single device.

[0062] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0063] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0064] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A liquid acid hydrocarbon three-phase separation device, characterized in that The liquid acid-hydrocarbon three-phase separation device includes a vertical separation tank (1), and an acid-hydrocarbon coalescence separation element (6), a gas-phase hydrocarbon separation assembly, and a liquid-phase hydrocarbon separation assembly that are arranged at intervals from top to bottom inside the vertical separation tank (1); The gas-phase hydrocarbon separation assembly includes a first housing (7) and a gas-liquid acid-hydrocarbon coalescence element (8). The first housing (7) covers the inner wall of the vertical separation tank (1) to form a first cavity. The first housing (7) is provided with a gas-liquid acid-hydrocarbon coalescence element (8) so that the first cavity is only communicated with the inner space of the vertical separation tank (1) through the gas-liquid acid-hydrocarbon coalescence element (8); The outlet of the gas-phase hydrocarbon separation assembly is communicated with the first cavity and extends out of the side wall of the vertical separation tank (1) to form a gas-phase hydrocarbon outlet (9); The liquid-phase hydrocarbon separation assembly includes a second housing (10) and a liquid-liquid acid-hydrocarbon coalescence element (11). The second housing (10) covers the inner wall of the vertical separation tank (1) to form a second cavity. The second housing (10) is provided with a liquid-liquid acid-hydrocarbon coalescence element (11) so that the second cavity is only communicated with the inner space of the vertical separation tank (1) through the liquid-liquid acid-hydrocarbon coalescence element (11); The outlet of the liquid-phase hydrocarbon separation assembly is communicated with the second cavity and extends out of the side wall of the vertical separation tank (1) to form a liquid-phase hydrocarbon outlet (12); A liquid acid-hydrocarbon inlet (3) and a liquid acid phase outlet (13) are further provided on the housing of the vertical separation tank (1). The liquid acid-hydrocarbon inlet (3) is located above the acid-hydrocarbon coalescence separation element (6), and the liquid acid phase outlet (13) is located below the liquid-phase hydrocarbon separation assembly; The liquid acid-hydrocarbon three-phase separation device further includes a compressor, and the inlet of the compressor is communicated with the gas-phase hydrocarbon outlet (9).

2. The liquid acid hydrocarbon three-phase separation device according to claim 1, wherein The gas-liquid acid-hydrocarbon coalescence element (8) is arranged at the bottom of the first cavity; the liquid-liquid acid-hydrocarbon coalescence element (11) is arranged at the bottom of the second cavity; The gas-liquid acid-hydrocarbon coalescing element (8) includes a stainless steel wire mesh, and the wire mesh density of the stainless steel wire mesh is 110-190 kg / m 3 ; The liquid-liquid acid-hydrocarbon coalescence element (11) includes a low-pressure-drop plate structured packing.

3. The liquid acid hydrocarbon three-phase separation device according to claim 1, characterized in that, A distribution assembly is further arranged inside the vertical separation tank (1), and the distribution assembly is arranged above the acid-hydrocarbon coalescence separation element (6); The distribution assembly includes a liquid acid-hydrocarbon distributor (4) and a liquid acid-hydrocarbon distribution tray (5) that are arranged at intervals up and down; The inlet of the liquid acid-hydrocarbon distributor (4) is communicated with the liquid acid-hydrocarbon inlet (3); The distance L4 between the liquid acid-hydrocarbon distribution tray (5) and the liquid acid-hydrocarbon distributor (4) in the axial direction of the vertical separation tank (1) is 200 - 2000 mm.

4. The liquid acid hydrocarbon three-phase separation device according to claim 3, characterized in that, The liquid acid-hydrocarbon distributor (4) includes a branched pipe. The branched pipe includes a main pipe and a plurality of branch pipes connected to the main pipe. The inlet of the main pipe is communicated with the liquid acid-hydrocarbon inlet (3), and a plurality of outlets are arranged on the branch pipes, and the plurality of outlets face upward and / or downward.

5. The liquid acid hydrocarbon three-phase separation device according to claim 3, wherein, The liquid acid-hydrocarbon distribution tray (5) includes a sieve plate or a bubble cap plate, and the opening rate of the liquid acid-hydrocarbon distribution tray (5) is 5 - 35%.

6. The liquid acid hydrocarbon three-phase separation device according to claim 1, characterized in that The distance L1 between the acid hydrocarbon agglomeration separation element (6) and the top end of the vertical separation tank (1) in the axial direction of the vertical separation tank (1) is 10-40% of the total height of the vertical separation tank (1).

7. The liquid acid hydrocarbon three-phase separation device according to claim 1, characterized in that, The acid hydrocarbon agglomeration separation element (6) comprises a filler or a corrugated plate; The packing includes wire mesh packing, and the wire mesh density of the wire mesh packing is 50~100 kg / m 3 .

8. The liquid acid hydrocarbon three-phase separation device according to claim 1, characterized in that, A distance L2 between the gas phase hydrocarbon outlet (9) and the top end of the vertical separation tank (1) in the axial direction of the vertical separation tank (1) is 20-60% of the total height of the vertical separation tank (1).

9. The liquid acid hydrocarbon three-phase separation device according to claim 1, characterized in that, A distance L3 between the liquid hydrocarbon outlet (12) and the top end of the vertical separation tank (1) in the axial direction of the vertical separation tank (1) is 50-80% of the total height of the vertical separation tank (1).

10. The liquid acid hydrocarbon three-phase separation device according to claim 1, characterized in that, The liquid acid phase outlet (13) is arranged at the bottom of the vertical separation tank (1); The liquid acid hydrocarbon three-phase separation device further comprises a vortex flow device (14) arranged inside the vertical separation tank (1), and an outlet of the vortex flow device (14) is connected to the liquid acid phase outlet (13).

Images