A gas-liquid-solid separation internal component and a gas-liquid-solid three-phase reactor

Abstract

The present invention provides a gas-liquid-solid separation internal component and a gas-liquid-solid three-phase reactor suitable for liquid-solid and gas-liquid-solid multiphase reaction systems. The gas-liquid-solid separation internal component is based on the flow field control in the reactor, and the gas-liquid-solid three-phase flow in the reactor is guided by the internal component setting, thereby achieving gas-liquid-solid separation. The flow resistance of the fluid in the component is small, and the enriched slurry can be directly returned to the main reaction zone by using the flow design of the flow field, without the need to transport the slurry back to the reactor through additional pipelines and pumps. The gas-liquid-solid separation internal component has a simple structure and high gas-liquid-solid separation efficiency, and can meet the requirements of large-scale and continuous production of gas-liquid-solid three-phase reactors.

Description

Technical Field

[0001] The invention relates to a reactor and a gas-liquid-solid separation internal component suitable for liquid-solid, gas-liquid and gas-liquid-solid multiphase reaction systems, and in particular to a gas-liquid-solid three-phase reactor. Background Art

[0002] Liquid-solid and gas-liquid-solid multiphase reaction systems are widely used in industrial fields such as chemical synthesis, hydrogenation reaction, wastewater biochemical treatment, polymer synthesis, biochemical engineering, etc. To realize these reaction processes, a multiphase reactor is generally required, and the types of reactors include bubbling bed reactors, gaslift loop reactors, stirred tank reactors, etc. The solid phase in the multiphase reaction system is generally a solid catalyst. During the actual reaction, the catalyst is generally evenly suspended in the liquid phase of the reactor. In order to achieve continuous operation and reaction performance of the reactor, on the one hand, it is required that the catalyst particles in the reactor maintain a certain concentration, and on the other hand, it is required that the liquid phase flowing out of the reactor does not contain solid catalysts. Therefore, the reactor is required to be able to well realize the gas-liquid-solid online separation function.

[0003] Existing solid-liquid separation methods include sedimentation, filtration, and magnetic separation. Among them, the filtration and magnetic separation equipment has a complex structure, and requires repeated switching and other cumbersome operations during the actual production process, which is not conducive to large-scale and continuous production. Sedimentation separation has the characteristics of simple equipment structure and large operational flexibility, and is the preferred separation scheme in multiphase reactors. The key to sedimentation separation is to develop efficient gas-liquid-solid separation internal components. CN1433838A proposes a separation unit with a box structure, which adopts the separation principle of liquid-solid countercurrent. CN100586440C proposes a liquid-solid continuous separation device, which uses the shallow sedimentation principle to install parallel inclined thin plates inside the layer settling tank. Both of the above schemes can be placed inside or outside the reactor, but the concentrated slurry phase containing the catalyst in these two schemes needs to be drawn out of the reactor first, and then pumped back into the reactor through a pipeline, adding additional components and processes. CN111035995 proposes a gas-liquid-solid three-phase separator, and CN113019268 proposes an inertial settler. The essential principle of these two solutions is similar to that of cyclone separators, which utilize the density difference between the solid and liquid phases of the flow to be separated and accelerate the sedimentation rate through centrifugal separation. However, the separation efficiency of centrifugal separation is not high enough, and it also brings a certain resistance drop. Generally, it is also necessary to transport the slurry back to the reactor through additional pipelines and pumps, and it will also cause abrasion of the catalyst particles.

[0004] In summary, developing a gas-liquid-solid separation internal component with a simple structure, high gas-liquid-solid separation efficiency, and applicable to liquid-solid and gas-liquid-solid multiphase systems and a reactor using the component has important industrial application value. Summary of the invention

[0005] The object of the present invention is to provide a gas-liquid-solid separation internal component and a gas-liquid-solid three-phase reactor suitable for liquid-solid and gas-liquid-solid multiphase reaction systems. The gas-liquid-solid separation internal component is based on the flow field control in the reactor, and the gas-liquid-solid three-phase flow in the reactor is guided by the internal component setting, thereby achieving gas-liquid-solid separation. The flow resistance of the fluid in the component is small, and the enriched slurry can be directly returned to the main reaction zone by utilizing the flow design of the flow field, without the need to transport the slurry back to the reactor through additional pipelines and pumps. The gas-liquid-solid separation internal component has a simple structure and high gas-liquid-solid separation efficiency, and can meet the requirements of large-scale and continuous production of gas-liquid-solid three-phase reactors.

[0006] On the one hand, to achieve the above-mentioned purpose, the present invention provides a gas-liquid-solid separation internal component, characterized in that it is applied to a multiphase flow three-phase reactor, and comprises a first separator (1), a second separator (2) and a radial guide (3); wherein the bottom edge of the first separator is connected to the radial guide, the second separator is arranged above the radial guide, and a flow channel (4) is formed between the lower edge of the second separator and the radial guide; the first separator and the second separator divide the cross-section of the reactor into a first area (5), a second area (6) and a third area (7), the first area and the second area realize gas-liquid separation, the third area realizes liquid-solid separation, the liquid phase in the first area and the third area flows from bottom to top, and the liquid phase in the second area flows from top to bottom.

[0007] Furthermore, the first partition and the second partition are one or a combination of a flat plate, a folded plate, a cylinder, an elliptical cylinder, a conical cylinder and a polygonal cylinder, and the radial guide is one or a combination of a flat plate, a folded plate, a cylinder, a conical cylinder and a polygonal cylinder.

[0008] Furthermore, when the radial flow guide is a flat plate or a folded plate, the angle between the structural axis of the radial flow guide and the axis of the reactor is 15-75 degrees, preferably 30-60 degrees; when the radial flow guide is a cylinder or a conical cylinder or a polygonal cylinder, the radial flow guide and the reactor are preferably coaxially arranged.

[0009] Furthermore, the gas-liquid-solid separation internal component further comprises a liquid-solid return channel (8), wherein the liquid-solid return channel is an opening on the radial flow guide; and / or the liquid-solid return channel is a gap formed between the radial flow guide and the reactor main structure. The liquid-solid return channel is used for returning the liquid-solid phase fluid to the main reaction area, and the flow direction of the fluid in the flow channel is from top to bottom; the ratio of the channel area of ​​the liquid-solid return channel to the cross-sectional area of ​​the second area is not greater than 1.0, preferably 0.05-0.5, and more preferably 0.1-0.3.

[0010] Furthermore, the gas-liquid-solid separation internal component is characterized in that, when the first partition and the second partition are one or a combination of a cylinder, an elliptical cylinder, a conical cylinder and a polygonal cylinder, it also includes a fixed connection structure, which is one or a combination of a support plate and a support rod, one end of the fixed connection structure is fixed to the first partition and the second partition, and the other end is fixed to the reactor main structure.

[0011] Furthermore, the gas-liquid-solid separation internal component is characterized in that when the first partition and the second partition are flat plates, the edges on both sides of the flat plates are connected to the reactor main structure.

[0012] On the other hand, the present invention provides a gas-liquid-solid three-phase reactor, characterized in that it comprises a gas-liquid-solid three-phase reactor body (9) and at least one gas-liquid-solid separation internal component, wherein the gas-liquid-solid separation internal component is arranged in the chamber of the gas-liquid-solid three-phase reactor body to divide the chamber of the gas-liquid-solid three-phase reactor into at least one gas phase space of an upper, middle and lower structure, a gas-liquid-solid three-phase separation zone and a reaction zone, the reaction zone is below the gas-liquid-solid three-phase separation zone, and the gas phase space is above the gas-liquid-solid three-phase separation zone.

[0013] Furthermore, the gas-liquid-solid three-phase reactor body is one or a combination of a bubbling bed reactor, a loop reactor, and a stirred tank reactor.

[0014] Furthermore, the gas-liquid-solid three-phase reactor shown includes a gas phase outlet and a liquid phase outlet, wherein the gas phase outlet is arranged in the gas phase space above the gas-liquid-solid separation internal component, and is used to extract the gas after gas-liquid separation from the reactor; the liquid phase outlet is arranged in the third area of ​​the gas-liquid-solid separation internal component, and is used to extract the liquid after liquid-solid separation from the reactor.

[0015] Furthermore, a gas distributor is arranged in the gas-liquid-solid three-phase reactor, and the gas distributor is one or a combination of a tubular distributor and a plate distributor.

[0016] Furthermore, the reactor is provided with an expansion section at the installation position of the gas-liquid-solid separation internal component, so as to further enhance the separation efficiency of the gas-liquid-solid three-phase of the gas-liquid-solid separation internal component.

[0017] Furthermore, when the catalyst particles contain particles with smaller particle sizes or the catalyst is partially broken during operation, a filter is provided inside or outside the reactor to further achieve efficient separation of the catalyst particles and ensure the catalyst concentration requirement in the reactor, wherein:

[0018] When the filter is disposed inside the reactor, the filter is disposed in the third region of the gas-liquid-solid separation internal component, and the filter comprises a plurality of groups of filter elements;

[0019] and / or,

[0020] When the filter is arranged outside the reactor, the filter is connected to the main structure of the reactor through a pipeline, the liquid phase outlet of the reactor is connected to the filtrate inlet of the filter, and the particle discharge outlet of the filter is connected to the concentrated slurry inlet of the reactor, so as to return the filtered catalyst particles to the reactor body.

[0021] The beneficial effect of the present invention is that the gas-liquid-solid separation internal component guides the gas-liquid-solid three-phase flow in the reactor through flow field control to achieve gas-liquid-solid separation. The flow resistance of the fluid in the reactor in the component provided by the present invention is small, and the solid slurry can be directly returned to the main reaction zone by using the flow design of the flow field, avoiding the technical solution of using pipes and pumps to transport the slurry back to the reactor.

[0022] The present invention also has the beneficial effect of being able to process catalyst particles of different particle size distributions. When the catalyst particles contain particles of smaller particle size or the catalyst is partially broken during operation, the gas-liquid-solid separation internal component can be further combined with the filter. On the one hand, the liquid-solid separation internal component significantly reduces the catalyst concentration of the reactor output liquid, greatly reducing the filter load of the filter. On the other hand, the separation internal component and the filter combination effectively separate the catalyst of small particle size, ensuring the concentration requirement of the catalyst in the reactor.

[0023] The gas-liquid-solid separation internal component provided by the present invention has a simple structure and high gas-liquid-solid separation efficiency, which greatly improves the large-scale and continuous production efficiency of the gas-liquid-solid three-phase reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1-4 Schematic diagram of the internal structure of gas-liquid-solid separation.

[0025] Figure 5-10 Schematic diagram of the gas-liquid-solid reactor structure.

[0026] In the figure: 1-first partition, 2-second partition, 3-radial guide, 4-flow channel, 5-first region, 6-second region, 7-third region, 8-liquid-solid return channel, 9-reactor body. DETAILED DESCRIPTION

[0027] The specific structures and implementation modes of the liquid-solid separation internal components of multiple preferred implementation examples of the present invention are described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] Figure 1Schematic diagram of the structure of the gas-liquid-solid separation internal component. In the liquid-solid separation internal component of this embodiment, it includes a first separator (1), a second separator (2) and a radial flow guide (3), the first separator, the second separator and the radial flow guide are flat plates, the two side edges of the first separator and the second separator flat plate are connected to the reactor main structure, the bottom edge of the first separator is connected to the radial flow guide, and the two are connected by welding, the second separator is arranged above the radial flow guide, and a flow channel (4) is formed between the lower edge of the second separator and the radial flow guide.

[0030] In the liquid-solid separation internal component of this embodiment, the first partition and the second partition divide the cross section (AA) of the reactor into a first area (5), a second area (6) and a third area (7). The first area and the second area realize gas-liquid separation, and the third area realizes liquid-solid separation. The liquid phase flows from bottom to top in the first area and the third area, and from top to bottom in the second area.

[0031] In the liquid-solid separation internal component of this embodiment, the angle between the structural axis (a) of the first partition and the second partition and the reactor axis (b) is 0 degree, that is, the first partition and the second partition are parallel to the reactor axis; the angle between the structural axis (c) of the radial guide member and the reactor axis is 30-60 degrees.

[0032] In the liquid-solid separation internal component of this embodiment, the gas-liquid-solid separation internal component further comprises a liquid-solid return channel (8), which is an opening on the radial flow guide, and the ratio of the channel area of ​​the liquid-solid return channel to the cross-sectional area of ​​the second region is 0.1-0.2. The liquid-solid return channel is used to return the liquid-solid phase fluid to the reaction main region, and the flow direction of the fluid in the flow channel is from top to bottom.

[0033] Example 2

[0034] Figure 2 Schematic diagram of the structure of the gas-liquid-solid separation internal component. In the liquid-solid separation internal component of this embodiment, it includes a first separator (1), a second separator (2) and a radial flow guide (3), the first separator and the second separator are cylinders, the radial flow guide is a conical cylinder, the first separator, the second separator and the radial flow guide are arranged concentrically with the reactor main structure, the inclination of the conical barrel of the radial flow guide is 45-60 degrees, the bottom edge of the first separator cylinder is connected to the upper edge of the conical cylinder of the radial flow guide, and the two are connected by welding, the second separator is arranged above the radial flow guide, and a flow channel (4) is formed between the lower edge of the second separator cylinder and the radial flow guide.

[0035] The liquid-solid separation internal component of this embodiment also includes a fixed connection structure, which is one or a combination of a support plate and a support rod, one end of which is fixed to the first partition and the second partition, and the other end is fixed to the reactor main structure.

[0036] In the liquid-solid separation internal component of this embodiment, the first partition and the second partition divide the cross section (AA) of the reactor into a first area (5), a second area (6) and a third area (7). The first area and the second area realize gas-liquid separation, and the third area realizes liquid-solid separation. The liquid phase flows from bottom to top in the first area and the third area, and from top to bottom in the second area.

[0037] In the liquid-solid separation internal component of this embodiment, the gas-liquid-solid separation internal component further comprises a liquid-solid return channel (8), which is a gap formed between the lower edge of the tapered cylinder of the radial guide member and the main structure of the reactor, and the ratio of the channel area of ​​the liquid-solid return channel to the cross-sectional area of ​​the second region is 0.1-0.2. The liquid-solid return channel is used for returning the liquid-solid phase fluid to the main reaction region, and the flow direction of the fluid in the flow channel is from top to bottom.

[0038] Example 3

[0039] Figure 3 Schematic diagram of the structure of the gas-liquid-solid separation internal component. In the liquid-solid separation internal component of this embodiment, it includes a first separator (1), a second separator (2) and a radial flow guide (3), the first separator and the second separator are cylinders, the radial flow guide is an inverted conical cylinder, the first separator, the second separator and the radial flow guide are arranged concentrically with the reactor main structure, the inclination of the radial flow guide conical barrel is 30-60 degrees, the bottom edge of the first separator cylinder is connected to the upper edge of the inverted conical cylinder of the radial flow guide, and the two are connected by welding, the second separator is arranged above the radial flow guide, and a flow channel (4) is formed between the lower edge of the second separator cylinder and the radial flow guide.

[0040] The liquid-solid separation internal component of this embodiment also includes a fixed connection structure, which is one or a combination of a support plate and a support rod, one end of which is fixed to the first partition and the second partition, and the other end is fixed to the reactor main structure.

[0041] In the liquid-solid separation internal component of this embodiment, the first partition and the second partition divide the cross section (AA) of the reactor into a first area (5), a second area (6) and a third area (7). The first area and the second area realize gas-liquid separation, and the third area realizes liquid-solid separation. The liquid phase flows from bottom to top in the first area and the third area, and from top to bottom in the second area.

[0042] In the liquid-solid separation internal component of this embodiment, the gas-liquid-solid separation internal component further comprises a liquid-solid return channel (8), the liquid-solid return channel is an opening at the lower barrel mouth of the inverted cone barrel of the radial guide member, the ratio of the channel area of ​​the liquid-solid return channel to the cross-sectional area of ​​the second region is 0.1-0.3, the liquid-solid return channel is used to return the liquid-solid phase fluid to the reaction main region, and the flow direction of the fluid in the flow channel is from top to bottom.

[0043] Example 4

[0044] Figure 4 Schematic diagram of the structure of the gas-liquid-solid separation internal component. In the liquid-solid separation internal component of this embodiment, it includes a first separator (1), a second separator (2) and a radial flow guide (3), the first separator is a cylinder, the second separator is a combination of a cylinder and a conical cylinder, the radial flow guide is a conical cylinder, the first separator, the second separator and the radial flow guide are arranged concentrically with the reactor main structure, the inclination of the conical barrel of the radial flow guide is 45-60 degrees, the bottom edge of the first separator cylinder is connected to the upper edge of the conical cylinder of the radial flow guide, and the two are connected by welding, the second separator is arranged above the radial flow guide, and a flow channel (4) is formed between the lower edge of the second separator cylinder and the radial flow guide.

[0045] The liquid-solid separation internal component of this embodiment also includes a fixed connection structure, which is one or a combination of a support plate and a support rod, one end of which is fixed to the first partition and the second partition, and the other end is fixed to the reactor main structure.

[0046] In the liquid-solid separation internal component of this embodiment, the first partition and the second partition divide the cross section (AA) of the reactor into a first area (5), a second area (6) and a third area (7). The first area and the second area realize gas-liquid separation, and the third area realizes liquid-solid separation. The liquid phase flows from bottom to top in the first area and the third area, and from top to bottom in the second area.

[0047] In the liquid-solid separation internal component of this embodiment, the gas-liquid-solid separation internal component further comprises a liquid-solid return channel (8), which is a gap formed between the lower edge of the tapered cylinder of the radial guide member and the main structure of the reactor, and the ratio of the channel area of ​​the liquid-solid return channel to the cross-sectional area of ​​the second region is 0.1-0.2. The liquid-solid return channel is used for returning the liquid-solid phase fluid to the main reaction region, and the flow direction of the fluid in the flow channel is from top to bottom.

[0048] It should be noted that the structures of the first partition, the second partition and the radial guide in Examples 1-4 are only used to illustrate the technical solution of the present invention, rather than to limit it. Those skilled in the art should understand that, based on the technical solution of the present invention, various modifications, deformations or combinations of equivalent structures that can be made by those skilled in the art without creative work, or directly or indirectly applied to other related technical fields, are still within the protection scope of the present invention.

[0049] Example 5

[0050] Figure 5 The present invention is a schematic diagram of the structure of a gas-liquid-solid reactor using the liquid-solid separation internal component described in Example 1. The reactor of this embodiment includes a gas-liquid-solid three-phase reactor body (9) and at least one gas-liquid-solid separation internal component described in Example 1, wherein the gas-liquid-solid separation internal component is arranged in the chamber of the gas-liquid-solid three-phase reactor body to divide the chamber of the gas-liquid-solid three-phase reactor into at least one gas phase space of an upper, middle and lower structure, a gas-liquid-solid three-phase separation zone and a reaction zone, the reaction zone is below the gas-liquid-solid three-phase separation zone, and the gas phase space is above the gas-liquid-solid three-phase separation zone.

[0051] In the reactor of this embodiment, the reactor is provided with an expansion section at the installation position of the gas-liquid-solid separation internal component to further enhance the separation efficiency of the gas-liquid-solid three-phase by the gas-liquid-solid separation internal component. The ratio of the cross-sectional area of ​​the third region of the liquid-solid separation internal component to the cross-sectional area of ​​the reactor body reaction zone is 1.0-1.8.

[0052] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor body is an internal loop reactor, including an inner sleeve (10) and a gas distributor (11), and the gas distributor is one or a combination of a tubular distributor and a plate distributor.

[0053] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor comprises a gas phase outlet and a liquid phase outlet, wherein the gas phase outlet is arranged in the gas phase space above the gas-liquid-solid separation internal component, for extracting the gas after gas-liquid separation from the reactor; the liquid phase outlet is arranged in the third area of ​​the gas-liquid-solid separation internal component, for extracting the liquid after liquid-solid separation from the reactor.

[0054] Table 1 shows the catalyst separation effect of the reactor under different conditions. When the catalyst particle size is ≥50μm, after separation by the gas-liquid-solid separation internal components, the catalyst particle concentration in the liquid phase extracted from the liquid phase outlet is reduced to below 0.01%, effectively achieving catalyst separation. When the catalyst contains smaller particle size catalysts (<50μm), the catalyst particle concentration of the liquid extracted from the liquid phase outlet is reduced to 0.1%. At this time, the catalyst entrained at the liquid phase outlet is mainly small particle catalysts below 30μm.

[0055] Table 1

[0056]

[0057] Example 6

[0058] Figure 6 The present invention is a schematic diagram of the structure of a gas-liquid-solid reactor using the liquid-solid separation internal component described in Example 3. The reactor of this embodiment includes a gas-liquid-solid three-phase reactor body (9) and at least one gas-liquid-solid separation internal component described in Example 3, wherein the gas-liquid-solid separation internal component is arranged in the chamber of the gas-liquid-solid three-phase reactor body to divide the chamber of the gas-liquid-solid three-phase reactor into at least one gas phase space of an upper, middle and lower structure, a gas-liquid-solid three-phase separation zone and a reaction zone, the reaction zone is below the gas-liquid-solid three-phase separation zone, and the gas phase space is above the gas-liquid-solid three-phase separation zone.

[0059] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor body is an inner loop reactor, comprising an inner sleeve (10) and a gas distributor (11), wherein the gas distributor is one or a combination of a tubular distributor and a plate distributor.

[0060] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor shown includes a gas phase outlet and a liquid phase outlet, wherein the gas phase outlet is arranged in the gas phase space above the gas-liquid-solid separation internal component, for extracting the gas after gas-liquid separation from the reactor; the liquid phase outlet is arranged in the third area of ​​the gas-liquid-solid separation internal component, for extracting the liquid after liquid-solid separation from the reactor.

[0061] Example 7

[0062] Figure 7 The present invention is a schematic diagram of the structure of a gas-liquid-solid reactor using the liquid-solid separation internal component described in Example 2. The reactor of this embodiment includes a gas-liquid-solid three-phase reactor body (9) and at least one gas-liquid-solid separation internal component described in Example 2, wherein the gas-liquid-solid separation internal component is arranged in the chamber of the gas-liquid-solid three-phase reactor body to divide the chamber of the gas-liquid-solid three-phase reactor into at least one gas phase space of an upper, middle and lower structure, a gas-liquid-solid three-phase separation zone and a reaction zone, the reaction zone is below the gas-liquid-solid three-phase separation zone, and the gas phase space is above the gas-liquid-solid three-phase separation zone.

[0063] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor body is a bubbling bed reactor, comprising a gas distributor (11), and the gas distributor is one or a combination of a tubular distributor and a plate distributor.

[0064] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor shown includes a gas phase outlet and a liquid phase outlet, wherein the gas phase outlet is arranged in the gas phase space above the gas-liquid-solid separation internal component, for extracting the gas after gas-liquid separation from the reactor; the liquid phase outlet is arranged in the third area of ​​the gas-liquid-solid separation internal component, for extracting the liquid after liquid-solid separation from the reactor.

[0065] Example 8

[0066] Figure 8 The present invention is a schematic diagram of the structure of a gas-liquid-solid reactor using the liquid-solid separation internal component described in Example 1. The reactor of this embodiment includes a gas-liquid-solid three-phase reactor body (9) and at least one gas-liquid-solid separation internal component described in Example 1, wherein the gas-liquid-solid separation internal component is arranged in the chamber of the gas-liquid-solid three-phase reactor body to divide the chamber of the gas-liquid-solid three-phase reactor into at least one gas phase space of an upper, middle and lower structure, a gas-liquid-solid three-phase separation zone and a reaction zone, the reaction zone is below the gas-liquid-solid three-phase separation zone, and the gas phase space is above the gas-liquid-solid three-phase separation zone.

[0067] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor body is a stirred tank reactor, including a gas distributor (11) and a stirring component (12), and the gas distributor is one or a combination of a tubular distributor and a plate distributor.

[0068] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor shown includes a gas phase outlet and a liquid phase outlet, wherein the gas phase outlet is arranged in the gas phase space above the gas-liquid-solid separation internal component, for extracting the gas after gas-liquid separation from the reactor; the liquid phase outlet is arranged in the third area of ​​the gas-liquid-solid separation internal component, for extracting the liquid after liquid-solid separation from the reactor.

[0069] Example 9

[0070] Fig. 9 The present invention is a schematic diagram of the structure of a gas-liquid-solid reactor using the liquid-solid separation internal component described in Example 1. The reactor of this embodiment includes a gas-liquid-solid three-phase reactor body (9) and at least one gas-liquid-solid separation internal component described in Example 1, wherein the gas-liquid-solid separation internal component is arranged in the chamber of the gas-liquid-solid three-phase reactor body to divide the chamber of the gas-liquid-solid three-phase reactor into at least one gas phase space of an upper, middle and lower structure, a gas-liquid-solid three-phase separation zone and a reaction zone, the reaction zone is below the gas-liquid-solid three-phase separation zone, and the gas phase space is above the gas-liquid-solid three-phase separation zone.

[0071] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor body is an inner loop reactor, comprising an inner sleeve (10) and a gas distributor (11), wherein the gas distributor is one or a combination of a tubular distributor and a plate distributor. The ratio of the cross-sectional area of ​​the third region of the liquid-solid separation internal component to the cross-sectional area of ​​the reactor body reaction zone is about 0.5.

[0072] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor comprises a gas phase outlet and a liquid phase outlet, wherein the gas phase outlet is arranged in the gas phase space above the gas-liquid-solid separation internal component, for extracting the gas after gas-liquid separation from the reactor; the liquid phase outlet is arranged in the third area of ​​the gas-liquid-solid separation internal component, for extracting the liquid after liquid-solid separation from the reactor.

[0073] In the reactor of this embodiment, a filter is arranged inside the reactor, and the filter is arranged in the third area of ​​the gas-liquid-solid separation internal component. The filter includes multiple groups of filter elements, and the filter elements are one or a combination of sintered type, asbestos type, diatomaceous earth type, ceramic type, glass type and cellulose membrane type.

[0074] Table 2 shows the effect of liquid-solid separation in the reactor under different conditions. When the catalyst particle size is 20-100 μm, after separation by the gas-liquid-solid separation internal components and the filter, the catalyst particle concentration in the liquid phase extracted from the liquid phase outlet is reduced to below 0.01%, effectively achieving the separation of small particle size catalysts.

[0075] Table 2

[0076] Experiment No. Catalyst particle size distribution μm Catalyst mass concentration in the reactor Liquid phase outlet catalyst concentration 1 20-100 10％ <0.01％ 2 20-100 20％ <0.01％

[0077] Example 10

[0078] Fig.10 The present invention is a schematic diagram of the structure of a gas-liquid-solid reactor using the liquid-solid separation internal component described in Example 1. The reactor of this embodiment includes a gas-liquid-solid three-phase reactor body (9) and at least one gas-liquid-solid separation internal component described in Example 1, wherein the gas-liquid-solid separation internal component is arranged in the chamber of the gas-liquid-solid three-phase reactor body to divide the chamber of the gas-liquid-solid three-phase reactor into at least one gas phase space of an upper, middle and lower structure, a gas-liquid-solid three-phase separation zone and a reaction zone, the reaction zone is below the gas-liquid-solid three-phase separation zone, and the gas phase space is above the gas-liquid-solid three-phase separation zone.

[0079] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor body is an inner loop reactor, comprising an inner sleeve (10) and a gas distributor (11), wherein the gas distributor is one or a combination of a tubular distributor and a plate distributor. The ratio of the cross-sectional area of ​​the third region of the liquid-solid separation internal component to the cross-sectional area of ​​the reactor body reaction zone is about 0.5.

[0080] In the reactor of this embodiment, the gas-liquid-solid three-phase reactor comprises a gas phase outlet and a liquid phase outlet, wherein the gas phase outlet is arranged in the gas phase space above the gas-liquid-solid separation internal component, for extracting the gas after gas-liquid separation from the reactor; the liquid phase outlet is arranged in the third area of ​​the gas-liquid-solid separation internal component, for extracting the liquid after liquid-solid separation from the reactor.

[0081] In the reactor of this embodiment, a filter is arranged outside the reactor, the filter is connected to the main structure of the reactor through a pipeline, the liquid phase outlet of the reactor is connected to the filtrate inlet of the filter, and the particle discharge outlet of the filter is connected to the concentrated slurry inlet of the reactor, so as to return the filtered catalyst particles to the reactor body. The filter is one or a combination of a sintered filter, an asbestos filter, a diatomaceous earth filter, a ceramic filter, a glass filter and a cellulose membrane filter.

[0082] Table 3 shows the effect of liquid-solid separation of the reactor under different conditions. In the reactor of this embodiment, the ratio of the cross-sectional area of ​​the third region of the liquid-solid separation internal component to the cross-sectional area of ​​the reactor body reaction zone is relatively small, about 0.5, and the sedimentation area of ​​the third region is limited. The separation of small-particle catalysts is achieved by combining with an external filter. As shown in Table 3, when the catalyst particle size is 20-100 μm and the concentration is 10%, the liquid extracted from the liquid phase outlet passes through the gas-liquid-solid separation internal component, and its catalyst particle concentration is reduced to about 0.5%. After passing through the external filter, the catalyst concentration at the filter outlet is reduced to below 0.01%.

[0083] In this embodiment, the beneficial effects of the combination of the liquid-solid separation internal component and the external filter are: on the one hand, the catalyst concentration of the liquid extracted from the liquid phase outlet of the reactor is significantly reduced by the liquid-solid separation internal component, which greatly reduces the filtration load of the external filter; on the other hand, the separation internal component and the external filter combination effectively realizes the separation of small particle size catalysts, ensuring the concentration requirements of the catalyst in the reactor.

[0084] Table 3

[0085]

Claims

1. A gas-liquid-solid separation internal component, characterized in that: The invention is applied to a gas-liquid-solid three-phase reactor, and comprises: a first partition, a second partition and a radial flow guide, wherein: The first partition and the second partition are cylinders, the radial flow guide is an inverted conical cylinder, the first partition, the second partition and the radial flow guide are arranged concentrically with the reactor main structure, the bottom edge of the first partition cylinder is connected to the upper edge of the inverted conical cylinder of the radial flow guide, the second partition is arranged above the radial flow guide, and a flow channel is formed between the lower edge of the second partition cylinder and the radial flow guide; The first partition and the second partition divide the cross section of the reactor into a first area, a second area and a third area, the first area and the second area realize gas-liquid separation, the third area realizes liquid-solid separation, the liquid phase flows from bottom to top in the first area and the third area, and the liquid phase flows from top to bottom in the second area; The gas-liquid-solid separation internal component further comprises a liquid-solid return channel, which is an opening of the lower tube mouth of the inverted conical tube of the radial guide member, and is used for returning the liquid-solid phase fluid to the main reaction area, and the flow direction of the fluid in the flow channel is from top to bottom; The gas-liquid-solid three-phase reactor body is an inner loop reactor, comprising an inner sleeve and a gas distributor.

2. The gas-liquid-solid separation internal component according to claim 1, characterized in that: The ratio of the channel area of ​​the liquid-solid return channel to the cross-sectional area of ​​the second region is not greater than 1.

0.

3. The gas-liquid-solid separation internal component according to claim 1 or 2, characterized in that: It also comprises a fixed connection structure, which is one or a combination of a support plate and a support rod, one end of which is fixed to the first partition and the second partition, and the other end is fixed to the reactor main structure.

4. A gas-liquid-solid three-phase reactor, characterized in that: include: A gas-liquid-solid three-phase reactor body and at least one gas-liquid-solid separation internal component according to any one of claims 1 to 3, wherein: The gas-liquid-solid separation internal components are arranged in the chamber of the gas-liquid-solid three-phase reactor body to divide the chamber of the gas-liquid-solid three-phase reactor into at least one gas phase space of an upper, middle and lower structure, a gas-liquid-solid three-phase separation zone and a reaction zone, the reaction zone is below the gas-liquid-solid three-phase separation zone, and the gas phase space is above the gas-liquid-solid three-phase separation zone.

5. The gas-liquid-solid three-phase reactor according to claim 4, wherein the gas distributor is one or a combination of a tubular distributor and a plate distributor.

6. The gas-liquid-solid three-phase reactor according to claim 4, further characterized in that: The reactor comprises a gas phase outlet and a liquid phase outlet, wherein The gas phase outlet is arranged in the gas phase space above the gas-liquid-solid separation internal component, and is used to extract the gas after gas-liquid separation out of the reactor; The liquid phase outlet is arranged in the third area of ​​the gas-liquid-solid separation internal component, and is used to extract the liquid after liquid-solid separation from the reactor.

7. The gas-liquid-solid three-phase reactor according to claim 4, further characterized in that: The reactor is provided with an expansion section at the installation position of the gas-liquid-solid separation internal component to further enhance the separation efficiency of the gas-liquid-solid three-phase of the gas-liquid-solid separation internal component.

8. The gas-liquid-solid three-phase reactor according to any one of claims 4 to 7, characterized in that: A filter is arranged inside or outside the reactor to further achieve efficient separation of catalyst particles, wherein: When the filter is disposed inside the reactor, the filter is disposed in the third region of the gas-liquid-solid separation internal component; and / or, When the filter is arranged outside the reactor, the liquid phase outlet of the reactor is connected to the filtrate inlet of the filter.

Images