Equipment and methods for enhanced separation of Fischer-Tropsch products

Abstract

This application discloses a Fischer-Tropsch product enhanced separation device and method. The Fischer-Tropsch product enhanced separation device includes: a separator shell, the separator shell including at least one feed inlet and a gas phase outlet, an oil phase outlet, and a water phase outlet arranged sequentially from top to bottom; a flow splitting assembly, the flow splitting assembly disposed within the separator shell and between the oil phase outlet and the water phase outlet; a buffer channel, the buffer channel communicating with the feed inlet and used to provide feed to the flow splitting assembly; at least one water-blocking structure, the water-blocking structure disposed within the separator shell and between the flow splitting assembly and the oil phase outlet; and a phase separation auxiliary component, the phase separation auxiliary component disposed between the separation assembly and the water-blocking structure. This application discloses a Fischer-Tropsch product enhanced separation device and method to solve the problem of unsatisfactory Fischer-Tropsch product enhanced separation effect in existing methods.

Description

Technical Field

[0001] This application relates to the field of Fischer-Tropsch synthesis technology, and more specifically, to an enhanced separation apparatus and method for Fischer-Tropsch products. Background Technology

[0002] The Fischer-Tropsch reaction products flow out of the reactor, initially separating into an aqueous phase and an oil phase, carrying a certain amount of gas. The aqueous phase consists of water and a small amount of oxygen-containing organic matter, while the oil phase consists of organic matter containing alkanes, alkenes, and higher carbon number oxygen-containing compounds. The gas phase consists of small amounts of permanent gases such as H2, CO, CO2, and CH4. The gas phase easily entrains small droplets from both the oil and aqueous phases, and due to temperature and pressure changes during the process, phase changes such as flash evaporation can easily occur, further exacerbating mist entrainment. The oil and aqueous phases are prone to emulsification and entrainment, with small droplets of oil-in-water and water-in-oil distributed in both phases. Incomplete separation can have a significant adverse impact on subsequent processes.

[0003] Therefore, there is a need for an enhanced separation device and method for Fischer-Tropsch products to solve the above problems. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose an enhanced separation device and method for Fischer-Tropsch products to solve the problem that the existing enhanced separation effect of Fischer-Tropsch products is not ideal.

[0005] To achieve the above objectives, this application provides a Fischer-Tropsch product enhanced separation device, comprising:

[0006] A separator housing, the separator housing including at least one feed inlet and a gas phase outlet, an oil phase outlet and a water phase outlet arranged sequentially from top to bottom;

[0007] A flow divider kit is disposed within the separator housing and between the oil phase outlet and the water phase outlet;

[0008] A buffer channel, which is connected to the feed inlet and is used to provide feed to the flow distribution kit;

[0009] At least one water-blocking structure is provided inside the separator housing and between the flow splitting assembly and the oil phase outlet;

[0010] Phase separation auxiliary component, which is disposed between the flow splitting kit and the water blocking structure.

[0011] Optionally, a water-absorbing structure is provided on the outer wall of the buffer channel, and the water-absorbing structure is in contact with the water-blocking structure.

[0012] Optionally, the edge of the water-blocking structure is provided with a flow guide, which is in contact with the water-absorbing structure.

[0013] Optionally, an oil-absorbing structure is provided at least partially between the buffer channel and the inner wall of the separator housing.

[0014] Optionally, the aqueous phase outlet is covered with an oil-blocking structure.

[0015] Optionally, the flow splitter kit includes at least one connecting channel and at least one flow splitter structure. The connecting channel is used to connect the buffer channel and the flow splitter structure. When there are multiple flow splitter structures, the multiple flow splitter structures are nested and connected from the inside to the outside. At least one water phase port and at least one oil phase port are respectively provided on opposite sides of the flow splitter structure.

[0016] Optionally, the phase separation auxiliary component is a plurality of phase separation auxiliary balls, the phase separation auxiliary balls including water-blocking balls and a plurality of water-absorbing protrusions evenly distributed on the outside of the water-blocking balls.

[0017] Optionally, the water-blocking ball is provided with a receiving cavity, which is filled with a buoyancy-adjusting medium.

[0018] This application also provides a method for enhanced separation of Fischer-Tropsch products, comprising:

[0019] (1) To supply a mixed phase of Fischer-Tropsch reaction products to the Fischer-Tropsch product enhancement separation equipment as described above;

[0020] (2) The Fischer-Tropsch reaction products of the mixed phase enter the splitting kit through the buffer channel from the feed port of the Fischer-Tropsch product enhanced separation equipment. Under the action of the separation auxiliary components, they are separated into aqueous products, oil products and gas products, and discharged from the separator shell through the aqueous outlet, oil outlet and gas outlet respectively.

[0021] Alternatively, step (2) may further include: the aqueous phase product is discharged from the separator housing through the oil-blocking structure from the aqueous phase outlet; and / or the oil phase product is discharged from the separator housing through the water-blocking structure from the oil phase outlet, and the aqueous phase product is intercepted by the water-blocking structure and then converges to the water-absorbing structure side.

[0022] As can be seen from the above, the Fischer-Tropsch product enhanced separation equipment and method provided in this application have the following advantages compared with the prior art: Using the aforementioned Fischer-Tropsch product enhanced separation equipment, the Fischer-Tropsch reaction products are separated into aqueous and oil phase products under the flow-dividing action of the flow-dividing kit, while simultaneously separating the entrained gas phase products from both phases. This also shortens the separation time and increases the purity of the partially emulsified oil and water phases. The separation auxiliary components effectively reduce turbulence in the oil and water phases, promote gas-liquid separation, reduce mist entrainment, effectively improve the purity of the three phases, improve the purity of products in subsequent processes, and increase the separation efficiency of each phase. Due to the improved separation effect, the temperature of the separation system can be reduced, thus reducing energy consumption. Attached Figure Description

[0023] The above features and technical advantages of this application will become clearer and easier to understand from the following description of its embodiments in conjunction with the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the Fischer-Tropsch product enhanced separation equipment used in a specific embodiment of this application.

[0025] Figure 2 for Figure 1 The diagram shows a splitting kit for a Fischer-Tropsch product enhancement separation device.

[0026] Figure 3 for Figure 1 The diagram shows the water-blocking structure of the Fischer-Tropsch product enhanced separation equipment.

[0027] Figure 4 for Figure 1 The diagram shows a phase separation auxiliary ball in a Fischer-Tropsch product enhanced separation device.

[0028] Figure 5 for Figure 1 The diagram shows the oil-blocking structure of the Fischer-Tropsch product enhanced separation equipment.

[0029] The attached figures are labeled as follows:

[0030] 1. Separator shell; 11. Feed inlet; 12. Gas phase outlet; 13. Oil phase outlet; 14. Water phase outlet; 2. Flow divider assembly; 3. Buffer channel; 4. Water blocking structure; 41. Water blocking membrane; 42. Chamfered edge; 5. Phase separation auxiliary ball; 6. Water-absorbing cotton; 7. Oil-absorbing cotton; 8. Oil blocking membrane. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0032] Figure 1 This is a schematic diagram of the Fischer-Tropsch product enhanced separation equipment used in a specific embodiment of this application. Figure 2 for Figure 1 The diagram shows a splitting kit for a Fischer-Tropsch product enhancement separation device. Figure 3 for Figure 1 The diagram shows the water-blocking structure of the Fischer-Tropsch product enhanced separation equipment. Figure 4 for Figure 1 A schematic diagram of the phase separation auxiliary sphere in a Fischer-Tropsch product enhanced separation device is shown. Figures 1 to 4 As shown, the Fischer-Tropsch product enhanced separation equipment includes a separator housing 1, a flow splitting kit 2, a buffer channel 3, at least one layer of water-blocking structure 4, and phase separation auxiliary components.

[0033] The separator housing 1 includes at least one feed inlet 11 and, from top to bottom, a gas phase outlet 12, an oil phase outlet 13, and a water phase outlet 14. The main body of the separator housing 1 is cylindrical, with an arc-shaped seal at the top and a conical seal at the bottom. Multiple feed inlets 11 are typically provided, such as 2-4 feed inlets 11 evenly distributed along the circumference of the main body of the separator housing 1. Typically, one gas phase outlet 12, one oil phase outlet 13, and one water phase outlet 14 are provided. The gas phase products are small amounts of permanent gases such as H2, CO, CO2, and CH4. The gas phase outlet 12 is located at the top of the separator shell 1, such as at the highest point of the arc-shaped seal. The gas phase outlet 12 can be connected to a blower to extract the gas phase products. The water phase outlet 14 is located at the bottom of the separator shell 1, such as at the lowest point of the conical seal. The water phase products are water and organic matter such as oxygen-containing compounds. The water phase outlet 14 can be connected to a water pump to extract the water phase products. The oil phase products are organic matter such as alkanes, alkenes, and oxygen-containing compounds with a high carbon number. The oil phase outlet 13 is located in the upper part of the main body of the separator shell 1, such as above the feed inlet 11. The oil phase outlet 13 can be connected to an oil pump to extract the oil phase products.

[0034] The flow divider assembly 2 is disposed within the separator housing 1, between the oil phase outlet 13 and the water phase outlet 14. The flow divider assembly 2 is located within the separator housing 1, at a relatively lower position, near the conical seal. The flow divider assembly 2 is used to separate the gaseous, aqueous, and oil phase products, particularly separating the aqueous and oil phase products entrained in the gaseous products. The aqueous products are heavier than the oil phase products, and the gaseous products are the lightest; that is, the aqueous products sink, the oil products float, and the gaseous products rise. With the flow divider assembly 2 positioned between the oil phase outlet 13 and the water phase outlet 14, the oil phase products float and are discharged through the oil phase outlet 13, the aqueous products sink and are discharged through the water phase outlet 14, and the gaseous products are discharged through the gas phase outlet 12. The flow divider assembly 2 is typically detachably connected within the separator housing 1. The flow divider assembly 2 includes multiple flow divider structures, the number of which can be increased or decreased according to the throughput to adjust the flexibility of the flow divider assembly 2. Multiple diversion structures can be set with different screening effects to adjust the accuracy of diversion kit 2.

[0035] The buffer channel 3 is connected to the feed inlet 11 and is used to supply feed to the diversion assembly 2. The feed inlet 11 is connected to the buffer channel 3, which is usually inclined inward to buffer and stabilize the flow. The total volume of the buffer channel 3 is adjusted according to the throughput. Typically, each feed inlet 11 is equipped with at least one buffer channel 3, and each buffer channel 3 is an independent structure. Alternatively, the buffer channel 3 can be configured as a funnel-shaped structure, with the feed inlet 11 connected to the top of the funnel-shaped structure. The diversion assembly 2 is located at the bottom of the funnel-shaped structure, and the annular gap of the funnel-shaped structure is filled with Fischer-Tropsch reaction products, which are stably conveyed to the diversion assembly in a plug flow.

[0036] The water-blocking structure 4 is installed inside the separator housing 1 and between the flow splitting kit 2 and the oil phase outlet 13. The water-blocking structure 4 does not affect the passage of gas phase products and oil phase products, while preventing the passage of aqueous phase products, so that the gas phase products and oil phase products move upward and can be discharged from the gas phase outlet 12 and the oil phase outlet 13 respectively, while the aqueous phase products move downward and can be discharged from the aqueous phase outlet 14.

[0037] The phase separation auxiliary component is positioned between the flow splitter kit and the water-blocking structure 4. This component repels water, further enhancing the separation of the aqueous and oil phases and reducing the burden on subsequent processes.

[0038] When the Fischer-Tropsch reaction products flow out of the reactor, they are mixed and initially separated into gas and wax phases before flowing into the Fischer-Tropsch product enhanced separation equipment. Within the separator shell 1, aqueous, oil, and gas phases are separated. Specifically, the Fischer-Tropsch reaction products enter the diversion kit 2 from the feed inlet 11 via the buffer channel 3. Under the diversion effect of the diversion kit 2, they are separated into aqueous, oil, and gas phase products. The separation auxiliary components reduce the entrainment of aqueous products in the gas phase. The water-blocking structure 4 does not affect the passage of gas and oil phase products, but it blocks the passage of aqueous products. Under gravity, the aqueous products move downwards and are discharged from the separator shell 1 through the aqueous outlet 14. The oil phase products float upwards, passing through the separation auxiliary components and the water-blocking structure 4 in sequence, and are discharged from the separator shell 1 through the oil outlet 13. The gas phase products move upwards, passing through the separation auxiliary components and the water-blocking structure 4 in sequence, continuing to move towards the top, and are discharged from the separator shell 1 through the gas outlet 12.

[0039] Using the aforementioned Fischer-Tropsch product enhancement separation equipment, the Fischer-Tropsch reaction products are separated into aqueous and oil phase products under the flow splitting action of the flow splitting kit 2. Simultaneously, the entrained gaseous products are separated from the two phases. This also shortens the separation time and increases the purity of the partially emulsified oil and aqueous phases. The separation auxiliary components effectively reduce turbulence in the gas, oil, and water phases, promoting gas-liquid separation, reducing mist entrainment, effectively improving the purity of the three phases, increasing the purity of products in subsequent processes, and improving the separation efficiency of each phase. Due to the improved separation effect, the temperature of the separation system can be reduced, thus lowering energy consumption.

[0040] In one embodiment of this application, the water-blocking structure 4 includes, but is not limited to, a water-blocking membrane 41, which is made of a superhydrophobic material or a filterable porous superhydrophobic material. For example, a polydopamine coating may be applied to the water-blocking structure 4.

[0041] In one embodiment of this application, the water-blocking structure 4 is typically configured as multiple layers, with each layer stacked sequentially and adjacent layers having a certain gap between them. Each layer of the water-blocking structure 4 has a generally similar shape, but varies in size due to different placement positions or coverage areas. For example, the water-blocking structures 4 are positioned between opposing buffer channels 3, which are inclined, meaning the distance between two buffer channels 3 gradually decreases from top to bottom. Multiple water-blocking structures 4 are sequentially spaced along the buffer channels 3, with the water-blocking structures 4 closer to the upper part of the buffer channel 3 being larger, and those closer to the lower part being smaller. Using the above-mentioned water-blocking structure 4, the number of layers and their positions can be flexibly adjusted, installation and disassembly are convenient, and it can be flexibly configured and adjusted according to the separation difficulty and processing volume of the Fischer-Tropsch reaction products.

[0042] Optionally, a water-absorbing structure is provided on the outer wall of the buffer channel 3, and the water-absorbing structure is in contact with the water-blocking structure 4. The water-blocking structure 4 is connected to the buffer channel 3, and the water phase intercepted by the water-blocking structure 4 gradually converges towards the water-absorbing structure, and is absorbed and guided back to the diversion kit 2 by the water-absorbing structure. By setting the above-mentioned water-absorbing structure, the water phase intercepted by the water-blocking structure 4 can be recovered, so that the oil phase and water phase are completely separated, improving the separation effect and avoiding adverse effects on subsequent processes.

[0043] In one embodiment of this application, the water-absorbing structure includes, but is not limited to, absorbent cotton 6, which is wrapped around the outside of the buffer channel 3 or disposed on the side of the buffer channel 3 facing the water-blocking structure 4. Because the buffer channel 3 is inclined, the absorbent cotton 6 is also inclined, and the water phase absorbed by the upper absorbent cotton 6 moves downward under the action of gravity.

[0044] Optionally, a guide is provided along the edge of the water-blocking structure 4, and the guide contacts the water-absorbing structure. Water trapped on the water-blocking membrane 41 converges at the chamfered edge, and the guide can direct the water phase to converge to one side, such as converging the water phase trapped in the middle of the water-blocking structure 4 towards the edge. Simultaneously, the guide directs the water phase towards the water-absorbing structure, ensuring that the water-blocking effect of the water-blocking structure 4 is not affected while promptly guiding the water phase backflow.

[0045] In one embodiment of this application, the water-blocking membrane 41 of the water-blocking structure 4 is high in the middle and low at the edges, with a chamfered edge 42 formed at the edges to collect the water phase trapped by the water-blocking membrane 41 and guide it to the water-absorbing structure. The chamfered edge 42 has the same chamfer depth and width, such as 2cm.

[0046] Optionally, an oil-absorbing structure is provided at least partially between the buffer channel 3 and the inner wall of the separator housing 1. The oil-absorbing structure can adsorb oil phase products, preventing oil phase products from remaining on the separator housing 1 and causing dead zones. By setting the oil-absorbing structure, residual oil on the inner wall of the separator housing 1 is adsorbed and discharged periodically.

[0047] In one embodiment of this application, the oil-absorbing structure includes, but is not limited to, oil-absorbing cotton 7, the buffer channel 3 is inclined, the gap between the buffer channel 3 and the separator housing 1 gradually increases from top to bottom, and the oil-absorbing cotton 7 fills the smallest gap between the buffer channel 3 and the separator housing 1.

[0048] Figure 5 for Figure 1 The diagram shows the oil-blocking structure of the Fischer-Tropsch product enhanced separation equipment. Figure 5 As shown, the Fischer-Tropsch product enhanced separation equipment includes an oil-blocking structure.

[0049] Optionally, the aqueous phase outlet 14 is covered with an oil-blocking structure. Aqueous phase products can pass through the oil-blocking structure, while oil phase products cannot. By setting the oil-blocking structure, once the aqueous phase product carries oil phase products out of the diversion kit 2, the aqueous phase product passes through the oil-blocking structure, while the oil phase product cannot. This ensures that only the aqueous phase product passes through the aqueous phase outlet 14, facilitating efficient separation of water and oil.

[0050] In one embodiment of this application, the oil-blocking structure includes, but is not limited to, an oil-blocking membrane 8, which is made of ultrafiltration / nanofiltration membrane material.

[0051] In one embodiment of this application, the oil-blocking membrane 8 is disposed above the aqueous phase outlet 14, or connected to the lower side of the diversion kit 2, or connected to the inner wall of the separator housing 1 and disposed around the aqueous phase outlet 14 to collect oil phase products and discharge them periodically.

[0052] Optionally, the flow splitter kit 2 includes at least one connecting channel and at least one flow splitter structure. The connecting channel connects the buffer channel 3 and the flow splitter structure. When there are multiple flow splitter structures, they are nested and connected sequentially from the inside out. Each flow splitter structure has at least one aqueous phase port and at least one oil phase port on opposite sides. The top of the flow splitter structure has multiple oil phase ports spaced apart along the axial direction, which are used to output oil phase products and gas phase products. The bottom of the flow splitter structure has multiple aqueous phase ports spaced apart along the axial direction, which are used to output aqueous phase products. There are one or more connecting channels. When there are multiple connecting channels, they are evenly distributed along the circumferential direction of the innermost flow splitter structure. One end of each connecting channel is connected to the buffer channel 3, and the other end is connected to the innermost flow splitter structure. The flow divider kit 2 can be nested with 1-5 layers of flow divider structures. The objects being screened on each flow divider structure are not exactly the same. Generally, the apertures of the water phase inlet and oil phase inlet of the flow divider kit 2 are larger the closer to the innermost layer, and smaller the apertures of the water phase inlet and oil phase inlet of the flow divider kit 2 are the closer to the outermost layer. The Fischer-Tropsch reaction products flow into the flow divider kit 2 from the feed inlet 11 through the buffer channel and gradually diffuse outward from the innermost flow divider structure. During the flow, the water phase sinks, while the gas and oil phases float. The water phase flows out through the water phase inlet, and the gas and oil phases flow out through the oil phase inlet. Using the above-mentioned flow divider kit 2, the number of layers and the opening ratio of the flow divider structure can be flexibly adjusted. It is easy to install and disassemble, and can be flexibly configured and adjusted according to the separation difficulty and throughput of the Fischer-Tropsch reaction products.

[0053] The flow divider kit 2 can be nested with 1-5 layers of flow divider structures. The flow divider kit 2 is configured with sieves / mesh according to the processing capacity of the separation equipment. The aperture ratio and pore size of each layer can be gradually varied, for example, gradually decreasing from the inside out, such as the aperture ratio gradually decreasing from 80% to 20%. In one embodiment of this application, the flow divider kit 2 is nested with 3 layers of flow divider structures. The innermost layer is the first layer, with a sieve structure having an aperture ratio of 80% and a pore size of 2mm. The second layer is spaced 2cm outside the first layer, also with a sieve structure having an aperture ratio of 50% and a pore size of 1mm. The third layer is spaced 3cm outside the second layer, with a 200-mesh sieve structure. After the Fischer-Tropsch reaction products enter the flow divider kit 2, the gas phase and most of the oil phase flow out from the oil phase outlet at the top of each flow divider structure, while the aqueous phase flows out from the aqueous phase outlet at the bottom of each flow divider structure.

[0054] Optionally, the phase separation auxiliary component comprises multiple phase separation auxiliary balls 5, each including a water-blocking ball and multiple water-absorbing protrusions evenly distributed around the water-blocking ball. The phase separation auxiliary balls 5 have a density of 0.75-1.0 and possess water-repelling properties. The water-absorbing protrusions facilitate the collection and aggregation of tiny water droplets. When small water droplets aggregate into larger droplets, the water-blocking ball repels water, and the droplets fall due to gravity, thus guiding the residual aqueous phase. Using the aforementioned phase separation auxiliary balls 5 helps to separate the mixed phase into an aqueous phase, an oil phase, and a gas phase, further improving the separation effect between the aqueous and oil phases and reducing the burden on subsequent processes. The number and position of the phase separation auxiliary balls 5 can be flexibly adjusted, and installation and disassembly are convenient. They can be flexibly configured and adjusted according to the separation difficulty and throughput of the Fischer-Tropsch reaction products.

[0055] In one embodiment of this application, the water-blocking ball is made of a water-blocking material. The surface of the water-blocking ball has evenly distributed water-absorbing protrusions, which resemble antennae-shaped, radiating fibers and are made of the water-absorbing material. The fibers are approximately 2 cm long and have a gradually changing width, being slightly thicker near the root of the water-blocking ball with a diameter of approximately 1 mm, and gradually tapering outwards.

[0056] Optionally, the water-blocking ball is provided with a receiving cavity, which is filled with a buoyancy-adjusting medium. By filling the receiving cavity with different buoyancy-adjusting media, the water-blocking ball has different buoyancy, thereby adjusting the position of the phase-separating auxiliary ball 5 above the flow-dividing kit 2.

[0057] In one embodiment of this application, the phase-separating auxiliary ball 5 can be made of two hemispherical structures that are engaged and connected together. The internal cavities of the two hemispherical structures form a receiving cavity, which can be filled with at least one of gas / liquid / solid phase media, so that the phase-separating auxiliary balls 5 with different gravity are positioned at different locations between the flow-dividing kit 2 and the bottommost water-blocking structure 4.

[0058] The following section further describes the operation of the Fischer-Tropsch product enhanced separation equipment.

[0059] The Fischer-Tropsch reaction products enter the splitting assembly 2 through the buffer channel 3 from the feed inlet 11. A pump can pressurize the Fischer-Tropsch reaction product feed, increasing the driving force for oil-water two-phase separation, improving permeation flux, and enhancing separation efficiency. Under the splitting action of the splitting assembly 2, the products are separated into aqueous, oil, and gaseous phases. The separation auxiliary components reduce the entrainment of water and oil phase products in the gaseous phase. The water-blocking structure 4 does not affect the passage of gaseous and oil phase products, but it blocks the passage of aqueous phase products. Under gravity, the aqueous phase products... The product moves downwards, passes through the oil-blocking structure, and is discharged from the separator housing 1 through the water phase outlet 14; the oil phase product floats upwards, passes through the separation auxiliary component and the water-blocking structure 4 in sequence, and is discharged from the separator housing 1 through the oil phase outlet 13; the water phase trapped by the water-blocking structure 4 gathers towards the chamfered edge 42, is adsorbed by the water absorption structure, moves downwards along the water absorption structure back to the diversion assembly 2, enters the diversion again, moves downwards, passes through the oil-blocking structure, and is discharged from the separator housing 1 through the water phase outlet 14; while the oil absorption structure adsorbs and periodically discharges residual oil. The gas phase product moves upwards, passes through the separation auxiliary component and the water-blocking structure 4 in sequence, continues to move towards the top, and is discharged from the separator housing 1 through the gas phase outlet 12.

[0060] The following describes the process of using the Fischer-Tropsch product enhanced separation equipment with reference to specific embodiments (see Table 1).

[0061] Table 1 Comparison of Product Pre-Separation System Effects

[0062]

[0063] In the comparative example, in a separator without a pump, flow divider 2, phase separation auxiliary ball 5, and water blocking structure 4, the system temperature was set to 35~50℃ and the system pressure was set to 0.1-0.4MPa by heating and pressurizing. The Fischer-Tropsch reaction products entered the reactor, and the separation effect of the gas, liquid, and oil phases was the worst. The liquid content of the gas phase was 50~120mg / L, the oil content of the water phase was 80~100mg / L, and the water content of the oil phase was 0~50mg / L.

[0064] In Example 1, a flow splitting kit 2 and a primary water-blocking structure 4 are added to the separator housing 1, which is not equipped with a pump and a phase separation auxiliary ball 5. Under normal temperature and pressure, the Fischer-Tropsch reaction products enter the reactor, and the separation effect of the gas, liquid and oil phases is relatively improved. The liquid content of the gas phase is 50~80 mg / L, which is 40 mg / L lower than the upper limit of the comparative example. The oil content of the water phase is 20~50 mg / L, which is 50 mg / L lower than the upper limit of the comparative example and 60 mg / L lower than the lower limit. The water content of the oil phase is 0~20 mg / L, which is 30 mg / L lower than the upper limit of the comparative example.

[0065] In Example 2, based on Example 1, a phase separation auxiliary ball 5 and an additional water-blocking structure 4 were added to form a two-stage water-blocking structure 4. Under normal temperature and pressure, the Fischer-Tropsch reaction products entered the reactor, further improving the separation effect of the gas, liquid, and oil phases. The liquid content of the gas phase was 20~60 mg / L, which is 60 mg / L lower and 30 mg / L lower than the comparative example; and 20 mg / L lower and 30 mg / L lower than Example 1. The oil content of the aqueous phase was 10~30 mg / L, which is 70 mg / L lower and 70 mg / L lower than the comparative example; and 20 mg / L lower and 10 mg / L lower than Example 1. The water content of the oil phase was 0~20 mg / L, which is 30 mg / L lower than the comparative example; and there was no significant change compared to Example 1.

[0066] In Example 3, based on Example 2, a pump and an additional water-blocking structure 4 are added to form a three-stage water-blocking structure 4. Under normal temperature and pressure, the Fischer-Tropsch reaction products enter the reactor, achieving the best three-phase separation effect of gas, liquid, and oil. The liquid content in the gas phase is 10-20 mg / L. Compared with the comparative example, the upper limit is reduced by 90 mg / L and the lower limit by 40 mg / L; compared with Example 1, the upper limit is reduced by 50 mg / L and the lower limit by 40 mg / L; compared with Example 2, the upper limit is reduced by 30 mg / L and the lower limit by 10 mg / L; water... The oil content in the oil phase is 0~20 mg / L. Compared with the comparative example, the upper limit is reduced by 80 mg / L and the lower limit is reduced by 80 mg / L. Compared with Example 1, the upper limit is reduced by 30 mg / L and the lower limit is reduced by 20 mg / L. Compared with Example 2, the upper limit is reduced by 10 mg / L and the lower limit is reduced by 10 mg / L. The water content in the oil phase is 0~20 mg / L. Compared with the comparative example, the upper limit is reduced by 40 mg / L. Compared with Examples 1 and 2, the upper limit is reduced by 10 mg / L. The separation time can be reduced from at least 50 min in the comparative example to 20 min.

[0067] This application also provides a method for enhanced separation of Fischer-Tropsch products, comprising:

[0068] (1) Provide a mixed phase of Fischer-Tropsch reaction products to the Fischer-Tropsch product enhanced separation equipment as described above; the Fischer-Tropsch product enhanced separation method may employ any of the above-described Fischer-Tropsch product enhanced separation equipment.

[0069] (2) The Fischer-Tropsch reaction products of the mixed phase enter the flow divider 2 through the buffer channel 3 from the feed port 11 of the Fischer-Tropsch product enhanced separation equipment. Under the action of the separation auxiliary components, they are separated into aqueous phase products, oil phase products and gas phase products, and discharged from the separator shell 1 through the aqueous phase outlet 14, the oil phase outlet 13 and the gas phase outlet 12 respectively.

[0070] The Fischer-Tropsch reaction products enter the flow divider 2 through the buffer channel 3 from the feed inlet 11. Under the flow divider 2, they are separated into aqueous phase products, oil phase products, and gas phase products. The separation auxiliary components reduce the entrainment of aqueous phase products in the gas phase products. The water blocking structure 4 does not affect the passage of gas phase products and oil phase products, but blocks the passage of aqueous phase products. Under the action of gravity, the aqueous phase products move downward and are discharged from the separator shell 1 through the aqueous phase outlet 14. The oil phase products float upward and pass through the separation auxiliary components and the water blocking structure 4 in sequence, and are discharged from the separator shell 1 through the oil phase outlet 13. The gas phase products move upward and pass through the separation auxiliary components and the water blocking structure 4 in sequence, and continue to move to the top, and are discharged from the separator shell 1 through the gas phase outlet 12.

[0071] Using the aforementioned Fischer-Tropsch product enhancement separation method, the Fischer-Tropsch reaction products are separated into aqueous and oil phase products under the flow splitting effect of the flow splitting kit 2. Simultaneously, the entrained gaseous products are separated from both phases. This also shortens the separation time and improves the purity of the partially emulsified oil and water phases. The separation auxiliary components effectively reduce turbulence in the oil and water phases, promote gas-liquid separation, reduce mist entrainment, effectively improve the purity of the three phases, increase the purity of products in subsequent processes, and improve the separation efficiency of each phase. Due to the improved separation effect, the temperature of the separation system can be reduced, thus lowering energy consumption.

[0072] Alternatively, step (2) may further include: the aqueous phase product is discharged from the separator housing 1 through the aqueous phase outlet 14 via the oil-blocking structure; the aqueous phase product moves downward, passes through the oil-blocking structure, and is discharged from the separator housing 1 through the aqueous phase outlet 14. By adopting the above-mentioned oil-blocking structure, the oil-liquid separation efficiency can be improved and the purity of the three phases can be increased.

[0073] And / or step (2) further includes: the oil phase product is discharged from the separator housing 1 through the oil phase outlet 13 via the water-blocking structure 4, and the aqueous phase product is intercepted by the water-blocking structure 4 and converges towards the water absorption structure side. The aqueous phase intercepted by the water-blocking structure 4 gathers towards the chamfered edge 42, is adsorbed by the water absorption structure, moves down along the water absorption structure and flows back to the flow divider kit 2, enters the flow divider again and moves down, passes through the oil-blocking structure, and is discharged from the separator housing 1 through the aqueous phase outlet 14. By using the above-mentioned water-blocking structure 4, the oil-liquid separation efficiency can be improved and the purity of the three phases can be improved.

[0074] As can be seen from the above description and practice, the Fischer-Tropsch product enhanced separation equipment and method provided in this application have the following advantages compared with the prior art: Using the above-mentioned Fischer-Tropsch product enhanced separation equipment, the Fischer-Tropsch reaction products are separated into aqueous and oil phase products under the flow-dividing action of the flow-dividing kit, while simultaneously separating the entrained gas phase products from both phases. This also shortens the separation time and improves the purity of the partially emulsified oil and water phases. The separation auxiliary components effectively reduce turbulence in the oil and water phases, promote gas-liquid separation, reduce mist entrainment, effectively improve the purity of the three phases, improve the purity of products in subsequent processes, and improve the separation efficiency of each phase. Due to the improved separation effect, the temperature of the separation system can be reduced, thus reducing energy consumption.

[0075] Those skilled in the art should understand that the above description is merely a specific embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the scope of this application should be included within the protection scope of this application.

Claims

1. A Fischer-Tropsch product enhanced separation device, characterized in that, include: A separator housing, the separator housing including at least one feed inlet and a gas phase outlet, an oil phase outlet and a water phase outlet arranged sequentially from top to bottom; A flow divider kit is disposed within the separator housing and between the oil phase outlet and the water phase outlet; A buffer channel, which is connected to the feed inlet and is used to provide feed to the flow distribution kit; At least one water-blocking structure is provided inside the separator housing and between the flow splitting assembly and the oil phase outlet; Phase separation auxiliary component, wherein the phase separation auxiliary component is disposed between the flow splitting kit and the water blocking structure; The buffer channel is inclined inward, and a water-absorbing structure is provided on the outer wall of the buffer channel, which is in contact with the water-blocking structure.

2. The Fischer-Tropsch product enhanced separation equipment according to claim 1, characterized in that: The edge of the water-blocking structure is provided with a flow guide, which is in contact with the water-absorbing structure.

3. The Fischer-Tropsch product enhanced separation equipment according to claim 1 or 2, characterized in that: An oil-absorbing structure is provided at least partially between the buffer channel and the inner wall of the separator housing.

4. The Fischer-Tropsch product enhanced separation apparatus according to claim 1 or 2, characterized in that: The aqueous phase outlet is covered with an oil-blocking structure.

5. The Fischer-Tropsch product enhanced separation apparatus according to claim 1 or 2, characterized in that: The flow splitter kit includes at least one connecting channel and at least one flow splitter structure. The connecting channel is used to connect the buffer channel and the flow splitter structure. When there are multiple flow splitter structures, the multiple flow splitter structures are nested and connected from the inside to the outside. At least one water phase port and at least one oil phase port are respectively provided on opposite sides of the flow splitter structure.

6. The Fischer-Tropsch product enhanced separation apparatus according to claim 1 or 2, characterized in that: The phase separation auxiliary component consists of multiple phase separation auxiliary balls, each including a water-blocking ball and multiple water-absorbing protrusions evenly distributed on the outside of the water-blocking ball.

7. The Fischer-Tropsch product enhanced separation apparatus according to claim 6, characterized in that: The water-blocking ball has a accommodating cavity inside, which is filled with a buoyancy-adjusting medium.

8. A method for enhanced separation of Fischer-Tropsch products, characterized in that, include: (1) Providing a mixed phase of Fischer-Tropsch reaction products to the Fischer-Tropsch product enhancement separation apparatus as described in any one of claims 1 to 7; (2) The Fischer-Tropsch reaction products of the mixed phase enter the splitting kit through the buffer channel from the feed port of the Fischer-Tropsch product enhanced separation equipment. Under the action of the separation auxiliary components, they are separated into aqueous products, oil products and gas products, and discharged from the separator shell through the aqueous outlet, oil outlet and gas outlet respectively.

9. The method for enhanced separation of Fischer-Tropsch products according to claim 8, characterized in that: Step (2) further includes: the aqueous phase product is discharged from the separator housing through the oil blocking structure from the aqueous phase outlet; and / or the oil phase product is discharged from the separator housing through the water blocking structure from the oil phase outlet, and the aqueous phase product is intercepted by the water blocking structure and then converges to the water absorption structure side.

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