Helical ribbon type inclined tube sedimentation module and helical ribbon type inclined tube partition sedimentation module

Abstract

The invention relates to a helical ribbon type inclined tube sedimentation module and a helical ribbon type inclined tube partition sedimentation module, relates to the technical field of chemical separation, is used for solving the problems of low equipment space utilization rate and the like when a conventional inclined plate (tube) or filler is applied to the field, and can realize standardization and serialization of modules and manufacturing. The module is composed of a plurality of coaxial cylinders which are nested at equal intervals and a plurality of helical ribbons which are arranged between adjacent cylinders at equal intervals, through helical ribbon type inclined tubes formed between adjacent cylinders and adjacent helical ribbons, the same separation effect as a conventional inclined plate (tube) or filler is realized, and meanwhile, the separation effect is further enhanced due to spiral turning flow of fluid. The separation effect of the module is only related to the height of the module and the inclination angle of the helical ribbon and is not related to the diameter of equipment, and the vertical space can be fully utilized to improve the separation effect and efficiency by increasing the height of the module and reducing the inclination angle of the helical ribbon, reduce the equipment size and improve the space utilization rate of the equipment.

Description

Technical Field

[0001] The present invention relates to the field of chemical separation technology, and in particular to a spiral ribbon inclined tube sedimentation module and a spiral ribbon inclined tube partition sedimentation module which can be installed in a vertical cylindrical chemical equipment where the medium is toxic, harmful, flammable and explosive and needs to be operated under closed, high temperature, pressurized or vacuum conditions, and is used for sedimentation and separation of a two-phase fluid mixture. Background Art

[0002] Inclined plates (tubes) or fillers designed based on shallow pool sedimentation theory have been widely used in the field of water treatment, greatly improving the efficiency of sedimentation separation in water treatment systems and significantly reducing the size and floor space of water treatment facilities.

[0003] However, the application of conventional inclined plates (tubes) or packing in the chemical industry is still relatively rare. The main reasons are:

[0004] In the chemical industry, most media are toxic, harmful and flammable hazardous chemicals. Chemical separation processes are mostly carried out under closed, high-temperature, pressurized or vacuum conditions. Container equipment is generally a cylindrical pressure-resistant structure; however, conventional inclined plates (tubes) or packings have the following problems when arranged in cylindrical equipment or devices.

[0005] ⑴ Cylindrical equipment or devices have low internal space utilization and small processing capacity

[0006] Based on the shallow pool sedimentation theory, in order to meet the separation requirements of two-phase fluid mixtures, conventional inclined plates (tubes) or inclined plate (tube) packings need to ensure the necessary straight flow channel length, and at the same time have a certain inclination angle to facilitate the smooth flow of the dispersed heavy phase fluid downward or the light phase fluid upward, and the inclination angle is generally 15 to 75 degrees. When conventional inclined plates (tubes) are arranged in a cylindrical container, due to the existence of the inclined plate (tube) inclination angle, a large part of the internal space of the equipment is invalid space. The larger the inclined plate (tube) flow channel length relative to the equipment barrel diameter, the smaller the inclination angle, the lower the equipment cross-sectional utilization rate, the lower the internal space utilization rate of the equipment, and the smaller the processing capacity.

[0007] ⑵The equipment or device occupies a large area, is low in height, and has low vertical space utilization

[0008] Based on the shallow pool sedimentation theory, the higher the separation effect requirements for conventional inclined plates (tubes) or fillers, the longer the straight flow channel of the inclined plates (tubes) is required, the smaller the inclination angle is, and the larger the horizontal size of the required equipment is. At the same time, in order to meet the processing capacity and space utilization requirements of the equipment, a larger horizontal size of the equipment is required; and the vertical size only needs to consider the minimum inclination angle requirement to ensure smooth flow of heavy phase fluid downward or light phase fluid upward; resulting in a large footprint, low height, and low vertical space utilization of the device.

[0009] In summary, the arrangement of conventional inclined plates (tubes) or fillers in vertical cylindrical equipment has problems and limitations such as low internal space utilization, small processing capacity, large equipment footprint, low height, and low vertical space utilization of the device.

[0010] Although conventional inclined plates (tubes) or packings have the above problems and limitations, they make full use of the effect of gravity and have the characteristics of low operating costs, fewer moving equipment in the process, and fewer supporting equipment. For this reason, researchers have proposed many improved methods and ideas to improve the limitations of their application in cylindrical chemical equipment, but there are still various applicability issues. Summary of the invention

[0011] The present invention provides a screw-belt inclined tube sedimentation module and a screw-belt inclined tube partitioned sedimentation module for two-phase fluid sedimentation separation, which are used to solve the problems of low internal space utilization, small processing capacity, large equipment footprint, low height and low vertical space utilization of the device when conventional inclined plates (tubes) or fillers are arranged in vertical cylindrical equipment.

[0012] The present invention provides a spiral ribbon inclined tube sedimentation module for sedimentation separation of two-phase fluids, the module is composed of a plurality of vertical coaxial cylinders nested with equal gaps and a plurality of parallel spiral ribbons equidistantly arranged circumferentially between adjacent coaxial cylinders, and mutually independent spiral sedimentation channels, namely spiral ribbon inclined tubes, are formed between adjacent coaxial cylinders and adjacent parallel spiral ribbons in the module, which serve as a space for flow and sedimentation separation of a two-phase fluid mixture medium, achieving the same separation effect as a conventional inclined plate (tube) or packing, and at the same time, the swirl sedimentation effect formed by the spiral directional flow of the fluid further strengthens the separation effect of the two-phase fluid mixture. The module can adopt an upward flow operation mode or a downward flow operation mode to adapt to different application scenarios.

[0013] In one embodiment, the screw-belt inclined tube sedimentation module is an integrated screw-belt inclined tube sedimentation module, which is composed of several coaxial cylinders and several screw belts welded or bonded as a whole; wherein, no cylinder is arranged on the outermost side of the module, and the largest cylinder and the inner wall of the cylindrical equipment and the screw belts therebetween constitute several screw-belt inclined tubes; the cylinder with the smallest diameter in the module is the central cylinder, and the inner diameter of the central cylinder is twice the width of the screw belt, and several screw belts can be placed inside it to form a screw-belt inclined tube together with the central cylinder.

[0014] In one embodiment, the spiral-ribbon inclined tube sedimentation module is a combined spiral-ribbon inclined tube sedimentation module, which is composed of a number of cylindrical spiral ribbon sub-modules of different specifications divided by different diameters and a central cylindrical spiral ribbon sub-module, which are nested and assembled in sequence according to the diameter size; wherein the cylindrical spiral ribbon sub-module is composed of a vertical coaxial cylinder and a number of spiral ribbons welded or bonded to the outer wall of the cylinder at equal distances and in parallel along the circumference of the cylinder, forming a standardized series of sub-modules according to the diameter size; the cylindrical spiral ribbon sub-module and the inner wall of the cylinder or cylindrical device of the cylindrical spiral ribbon sub-module adjacent to the outside form a number of spiral ribbon inclined tubes; the inner diameter of the cylinder of the smallest cylindrical spiral ribbon sub-module is twice the width of the spiral ribbon; the central cylindrical spiral ribbon sub-module is composed of a number of spiral ribbons wrapped around the central axis of the spiral ribbon, and the module diameter is twice the width of the spiral ribbon, and is installed in the cylinder of the smallest cylindrical spiral ribbon sub-module, and the two together constitute a number of spiral ribbon inclined tubes.

[0015] In one embodiment, the innermost cylinder of the spiral ribbon inclined tube sedimentation module is the central cylinder, or a cylinder with a larger diameter than the central cylinder. No cylinder, spiral ribbon or sub-module may be arranged inside the cylinder, which only serves as a channel for entering and exiting materials to form an annular sedimentation module.

[0016] In one embodiment, the spiral inclination angle β (the angle between the spiral and the horizontal plane) ranges from 15 to 75°, the spiral direction of the spiral can be left-handed or right-handed, and the spiral directions of the spirals between different adjacent coaxial cylinders are the same or different.

[0017] In one embodiment, the width of the spiral ribbon between any two adjacent cylinders is the same, and the gap between any adjacent coaxial cylinders is the same and equal to the spiral ribbon width C. The value range of the spiral ribbon width C is: 30-100 mm.

[0018] In one embodiment, the spiral ribbons between adjacent coaxial cylinders are arranged equidistantly along the circumferential direction, and the number of spiral ribbons is calculated based on the vertical spacing B between adjacent spiral ribbons on the vertical section of the spiral sedimentation channel being the same value or a close value to the spiral ribbon width C. The corresponding horizontal spacing F of the spiral ribbons is approximately calculated as follows: F=C / sinβ; the number of spiral ribbons between different adjacent coaxial cylinders and the vertical spacing B and horizontal spacing F of adjacent spiral ribbons are, in principle, calculated and determined based on the close hydraulic diameters of the vertical section of the spiral sedimentation channel.

[0019] In one embodiment, the cross-sectional shape of the spiral ribbon is semicircular, semi-elliptical, semi-regular polygonal, straight line or broken line.

[0020] In one embodiment, the module is made of a thin-walled material with a polished surface that can ensure the rigidity of the module. Metal or non-metal materials can be used to minimize the weight of the module and reduce the flow resistance of the dispersed phase heavy phase fluid downward or the light phase fluid upward.

[0021] The present invention also provides a spiral-belt inclined tube partition sedimentation module for two-phase fluid sedimentation separation. The module is divided into two functional physical partitions, an inner and an outer partition, by a coaxial isolation tube. The outer partition is an annular partition surrounding the inner partition. The inner and outer partitions are connected at the bottom and physically isolated at the top by the coaxial isolation tube. Among them, the two functional partitions are a coarse partition and a purification partition, respectively. Both the inner and outer partitions can be used as coarse partitions or purification partitions, one of the partitions is used as a coarse partition, and the other partition is used as a purification partition.

[0022] In one embodiment, the coarse zone is used to separate the dense two-phase fluid, and adopts a downward flow operation mode; the purification zone is used to further separate the dilute two-phase fluid discharged from the coarse zone and the dilute two-phase fluid feed, and adopts an upward flow operation mode.

[0023] In one embodiment, the two partitions may adopt different spiral ribbon cross-sectional shapes, heights, widths, quantities, inclination angles, and flow cross-sectional ratios according to the separation task requirements.

[0024] In one embodiment, the above-mentioned screw-ribbon inclined tube sedimentation module is used, or manufactured according to an integrated screw-ribbon inclined tube sedimentation module, or assembled by nesting combined screw-ribbon inclined tube sedimentation module submodules.

[0025] The screw-belt inclined tube settling module provided by the present invention may be an integrated screw-belt inclined tube settling module.

[0026] (1) The module is welded or bonded by a number of vertical coaxial cylinders nested with equal gaps and a number of parallel spiral ribbons or spiral ribbons with special cross-sections arranged equidistantly between adjacent coaxial cylinders;

[0027] (2) In this module, adjacent coaxial cylinders and adjacent parallel spiral ribbons form a number of independent spiral sedimentation channels that are not connected to each other except the upper and lower ends of the cylinders, namely spiral ribbon inclined tubes, which serve as the flow and sedimentation separation space for the two-phase fluid mixture, achieving the same separation effect as conventional inclined plates (tubes) or packings;

[0028] ⑶ The outermost side of the module may not be provided with a cylinder, and the largest cylinder and the inner wall of the cylindrical equipment and the spiral belt 2 therebetween form a number of spiral belt type inclined tubes.

[0029] (4) The cylinder with the smallest diameter in the module is the central cylinder, and the inner diameter of the central cylinder is twice the width of the spiral ribbon. Several spiral ribbons can be placed inside it to form a spiral ribbon inclined tube together with the central cylinder, which serves as a space for the flow and sedimentation separation of the two-phase fluid mixture;

[0030] ⑸The innermost cylinder of the module can be the central cylinder or a cylinder with a larger diameter than the central cylinder. The cylinder and the spiral belt may not be arranged inside the cylinder, and it only serves as a channel for the inlet and outlet of materials to form an annular sedimentation module.

[0031] The spiral ribbon inclined tube sedimentation module provided by the present invention can also be a combined spiral ribbon inclined tube sedimentation module: (1) The module is composed of a number of standardized and serialized cylindrical spiral ribbon sub-modules of different specifications divided by different diameters and a central cylinder spiral ribbon sub-module, which are nested and assembled in sequence according to the diameter size to form a modular structure. The cylinders of adjacent sub-modules and the spiral ribbons of the inner sub-modules are tightly matched to form a number of spiral sedimentation channels, namely spiral ribbon inclined tubes, which serve as a space for the flow and sedimentation separation of the two-phase fluid mixture medium, achieving the same separation effect as conventional inclined plates (tubes) or fillers.

[0032] (2) The cylindrical spiral ribbon sub-module consists of a vertical coaxial cylinder and a number of spiral ribbons welded or bonded to the outer wall of the cylinder at equal distances and in parallel along the circumference of the cylinder, forming a standardized series of sub-modules according to the diameter size; the inner wall of the cylinder or cylindrical equipment of the cylindrical spiral ribbon sub-module and the adjacent cylindrical spiral ribbon sub-module on the outside forms a number of spiral ribbon inclined tubes; the inner diameter of the cylinder of the smallest cylindrical spiral ribbon sub-module is twice the width of the spiral ribbon.

[0033] (3) The central cylinder spiral ribbon submodule is composed of a number of spiral ribbons wrapped around the central axis of the spiral ribbon. The module diameter is twice the width of the spiral ribbon. It is installed in the cylinder of the smallest cylindrical spiral ribbon submodule. The two together constitute a number of spiral ribbon inclined tubes.

[0034] (4) The cylindrical spiral belt submodule with the largest diameter in the module and the cylinder of the vertical cylindrical equipment form a number of spiral belt type inclined tubes;

[0035] (5) The innermost cylindrical spiral ribbon submodule of the module may be a minimum cylindrical spiral ribbon submodule whose inner diameter is twice the spiral ribbon width, or a cylindrical spiral ribbon submodule with a larger diameter than the minimum cylindrical spiral ribbon submodule. No submodule may be arranged in the submodule, which only serves as a channel for inlet and outlet of materials to form an annular sedimentation module;

[0036] (6) Compared with the integrated screw-ribbon inclined tube sedimentation module, the advantage of the combined screw-ribbon inclined tube sedimentation module is that it can realize the standardization and serialization of module and component manufacturing, can be assembled on-site according to the actual situation on site, and is easy to select, install, maintain or replace, thereby improving the application scope of the combined sedimentation module.

[0037] The present invention also provides a spiral ribbon inclined tube partition sedimentation module for sedimentation separation of two-phase fluid.

[0038] ⑴The module is divided into two functional physical partitions, inner and outer, by a coaxial isolation tube. The outer partition is an annular partition surrounding the inner partition. The inner and outer partitions are connected at the bottom and physically isolated at the top by the coaxial isolation tube.

[0039] ⑵The two functional partitions are the coarse partition and the purification partition. Both the inner and outer partitions can be used as coarse partitions or purification partitions. One partition is used as the coarse partition and the other partition is used as the purification partition.

[0040] ⑶ The coarse partition is used to separate the dense two-phase fluid, and adopts the downward flow operation mode; the purification zone is used to further separate the dilute two-phase fluid discharged from the coarse partition and the dilute two-phase fluid feed, and adopts the upward flow operation mode;

[0041] ⑷ The two partitions can adopt different spiral ribbon cross-sectional shapes, heights, widths, quantities, inclination angles and flow cross-sectional ratios according to the separation task requirements;

[0042] ⑸The module can be manufactured according to an integrated screw-ribbon inclined tube sedimentation module, or it can be assembled by nesting sub-modules of combined screw-ribbon inclined tube sedimentation modules.

[0043] ⑹ It can process two feed streams, dense phase mixture and dilute phase mixture, to adapt to different application scenarios. The dense phase mixture enters from the top of the coarse zone, the dilute phase mixture enters from the purification zone and the bottom of the purification zone, and the light phase is discharged from the top of the purification zone;

[0044] The coaxial cylinder and the spiral ribbon in the spiral ribbon type inclined tube sedimentation module and the spiral ribbon type inclined tube partitioned sedimentation module provided by the present invention:

[0045] (1) The spiral ribbon inclination angle (the angle between the spiral ribbon and the horizontal plane) β ranges from 15 to 75°. The spiral direction of the spiral ribbon can be left-handed or right-handed. The spiral directions of the spiral ribbons between different adjacent coaxial cylinders 1 can be the same or different, preferably the same direction.

[0046] For liquid-liquid separation and gas-liquid separation, the spiral ribbon inclination angle β is preferably 15-45°, or even smaller; for solid-liquid separation, when the downward flow operation is adopted, the spiral ribbon inclination angle β is preferably 45°; when the upward flow operation is adopted, for the material system with small viscosity characteristics of solid precipitation, the spiral ribbon inclination angle β is preferably 45°, and for the material system with large viscosity characteristics of solid precipitation, the spiral ribbon inclination angle β is preferably 60°;

[0047] ⑵ The width of the spiral ribbon between any two adjacent cylinders is the same, and the gap between any adjacent coaxial cylinders is the same and equal to the spiral ribbon width C. The value range of the spiral ribbon width C is: 30~100mm.

[0048] ⑶ The spiral ribbons between adjacent coaxial cylinders are arranged equidistantly along the circumferential direction. The number of spiral ribbons is calculated based on the spacing (vertical spacing) B between adjacent spiral ribbons on the vertical section of the spiral sedimentation channel, which is the same value or a close value to the spiral ribbon width C. The corresponding horizontal spacing F of spiral ribbons is approximately calculated as: F=C / sinβ; the number of spiral ribbons between different adjacent coaxial cylinders 1 and the vertical spacing B and horizontal spacing F of adjacent spiral ribbons are, in principle, calculated and determined based on the close hydraulic diameters of the vertical section of the spiral sedimentation channel.

[0049] (4) The height of the module and the spiral ribbon is H, the unfolded length of the spiral ribbon is L, and the calculation formula of L is: L = H / sinβ.

[0050] (5) The cross-section of the spiral ribbon can be a straight line, a broken line, a semicircle, a semi-ellipse, a semi-regular polygon or other special-shaped cross-sections. The concave side of the cross-section of the spiral sedimentation channel is used as the main contact part with the aggregated dispersed phase. The existence of sharp angles in the cross-section of the contact part between the spiral ribbon inclined tube and the aggregated dispersed phase is avoided as much as possible, so as to minimize the sliding resistance between the aggregated dispersed phase and the spiral ribbon inclined tube;

[0051] (6) The above-mentioned spiral ribbon inclined tube sedimentation module is made of a thin-walled material with a polished surface that can ensure the rigidity of the module. Metal or non-metal materials can be used to minimize the weight of the module and reduce the downward flow resistance of the heavy phase fluid of the dispersed phase or the upward flow resistance of the light phase fluid.

[0052] The spiral ribbon inclined tube sedimentation module and the spiral ribbon inclined tube partitioned sedimentation module proposed in the present invention are actually variants of the sedimentation inclined plate (tube) or filler commonly used in the field of water treatment. Its theoretical basis is still the shallow pool sedimentation theory. It innovatively adopts a spiral sedimentation channel composed of coaxial cylinders and spiral ribbons arranged equidistantly between adjacent cylinders, namely a spiral ribbon inclined tube, to achieve the same separation effect as conventional inclined plates (tubes) or fillers. At the same time, the cyclone sedimentation effect formed by the spiral directional flow of the fluid further enhances the separation effect of the two-phase fluid mixture. Compared with the prior art, the advantages of the present invention are:

[0053] (1) The spiral ribbon inclined tube sedimentation module consists of a number of vertical coaxial cylinders nested with equal gaps and a number of parallel spiral ribbons equidistantly arranged circumferentially between adjacent coaxial cylinders. In the module, independent spiral sedimentation channels, namely spiral ribbon inclined tubes, are formed between adjacent coaxial cylinders and adjacent parallel spiral ribbons, achieving the same separation effect as conventional inclined plates (tubes) or packings.

[0054] (2) In the case of the same coaxial cylinder height and the same spiral inclination angle β of the spiral ribbon inclined tube sedimentation module, the lengths of all spiral ribbons and spiral ribbon inclined tubes are also the same. When the hydraulic diameters of the spiral ribbon inclined tubes are close and the cyclone sedimentation effect is not considered, the separation effects and efficiencies of all spiral ribbon inclined tubes are almost the same. In fact, the cyclone sedimentation effect formed by the spiral directional flow of the fluid in the above-mentioned spiral ribbon inclined tube sedimentation module further enhances the solid-liquid separation effect. Toward the central axis of the module, the smaller the diameter of the coaxial cylinder is, the smaller the lead of the corresponding spiral ribbon and spiral ribbon inclined tube is, the larger the lead number is, the more turns the fluid flows through the spiral ribbon inclined tube, the greater the change in fluid direction, the greater the effect of cyclone sedimentation, and the cumulative effect of gravity sedimentation, the higher the two-phase sedimentation separation efficiency is, and the better the separation effect is.

[0055] ⑶ The separation effect of the spiral ribbon inclined tube sedimentation module is only related to the module height and the spiral ribbon inclination angle, and has nothing to do with the equipment diameter. The inclined tube length and inclination angle are no longer limited by the equipment diameter, realizing the infinite extension of the inclined tube length in the vertical direction. The vertical space can be fully utilized to improve the separation effect and efficiency by increasing the module height and reducing the spiral ribbon inclination angle without increasing the equipment diameter, thereby minimizing the equipment footprint and improving the vertical space utilization rate of the device and the internal space utilization rate of the equipment.

[0056] (4) The use of combined screw-ribbon inclined tube sedimentation modules and screw-ribbon inclined tube partitioned sedimentation modules can realize the standardization and serialization of the manufacturing of modules and screw-ribbon inclined tube partitioned sedimentation modules. They can be assembled on-site according to the actual situation on site, which is convenient for selection, installation, maintenance or replacement, thereby improving the application scope of the combined sedimentation modules.

[0057] ⑸ The spiral-ribbon inclined tube partition sedimentation module improves the adaptability to two-phase fluid mixture raw materials to adapt to different application scenarios.

[0058] ⑹The above-mentioned screw-ribbon inclined tube sedimentation module and screw-ribbon inclined tube partition sedimentation module, due to the use of screw-ribbon inclined tubes, have a cylindrical structure, which makes up for the shortcomings of conventional inclined tube fillers. They are particularly suitable for installation in vertical pressure-resistant cylindrical equipment where the media is toxic, harmful, flammable and explosive and needs to be operated under closed, high temperature, pressurized or vacuum conditions. They can be used as internal parts of chemical equipment for sedimentation and separation of two-phase mixtures such as solid-liquid, liquid-liquid, gas-liquid and gas-solid, and can be coupled with other unit operations to simplify chemical processes and operations, reduce investment costs and operating costs, and have high application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0060] Figure 1 It is a schematic diagram of the structural composition of the integrated spiral ribbon inclined tube settling module in the first embodiment of the present invention;

[0061] Figure 2 It is a schematic diagram of the three-dimensional structural parameters of the coaxial cylinder and the spiral ribbon of the spiral ribbon inclined tube sedimentation module and the spiral ribbon inclined tube partition sedimentation module;

[0062] Figure 3 It is a three-dimensional structure and nesting schematic diagram of the combined spiral ribbon inclined tube sedimentation module in the second embodiment;

[0063] Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure of the medium cylindrical spiral ribbon module;

[0064] Figure 5 yes Figure 3 Schematic diagram of the three-dimensional structure of the central tube spiral ribbon module;

[0065] Figure 6a and Figure 6b It is a schematic diagram of the three-dimensional structure of the spiral ribbon inclined tube sedimentation module in the third embodiment;

[0066] Figure 7a and Figure 7b It is a schematic diagram of the three-dimensional structure of the spiral ribbon inclined tube sedimentation module in the fourth embodiment;

[0067] Figure 8a and Figure 8b It is a schematic diagram of the three-dimensional structure of the spiral ribbon inclined tube sedimentation module in the fifth embodiment;

[0068] Fig. 9 It is a schematic diagram of the three-dimensional structure of the spiral ribbon type inclined tube partitioned sedimentation module in the sixth embodiment;

[0069] Fig.10 It is a schematic diagram of the three-dimensional structure composition of the spiral ribbon type inclined tube partitioned sedimentation module in the seventh embodiment;

[0070] Fig.11 It is a schematic diagram of the three-dimensional structural composition of the spiral-belt inclined tube partitioned sedimentation module in Example 8.

[0071] Reference numerals:

[0072] 1. Coaxial cylinder; 2. Spiral ribbon; 3. Spiral ribbon inclined tube; 4. Center cylinder; 5. Isolation cylinder;

[0073] 10. Cylindrical spiral tape module; 20. Central cylindrical spiral tape module. DETAILED DESCRIPTION

[0074] The present invention will be further described below in conjunction with the accompanying drawings.

[0075] Embodiments 1 and 2 are used to illustrate the structural features of the integrated and combined spiral ribbon inclined tube sedimentation modules;

[0076] Embodiments 3, 4 and 5 are used to illustrate the structural features and application scenarios of the spiral ribbon inclined tube sedimentation module;

[0077] Embodiments 6, 7 and 8 are used to illustrate the features and application scenarios of the screw-belt inclined tube partitioned sedimentation module.

[0078] It should be noted that although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0079] Embodiment 1

[0080] like Figure 1 As shown, the present invention provides an integrated screw-belt inclined tube sedimentation module.

[0081] (1) The module is welded or bonded by a plurality of (i.e., 2 or more) vertical coaxial cylinders 1 nested with equal gaps and a plurality of parallel spiral ribbons or spiral ribbons 2 with special cross-sections arranged equidistantly between adjacent coaxial cylinders;

[0082] (2) In this module, adjacent coaxial cylinders 1 and adjacent parallel spiral ribbons 2 form a number of independent spiral sedimentation channels, namely spiral ribbon inclined tubes 3, which are not connected to each other except the upper and lower ends of the cylinders. They serve as the space for the flow and sedimentation separation of the two-phase fluid mixture, achieving the same separation effect as conventional inclined plates (tubes) or packings;

[0083] ⑶ The outermost side of the module may not be provided with a cylinder, and the largest coaxial cylinder 1 and the inner wall of the cylindrical equipment and the spiral belt 2 therebetween form a plurality of spiral belt-type inclined tubes 3.

[0084] (4) The cylinder with the smallest diameter in the module is the central cylinder 4, and the inner diameter of the central cylinder is twice the width of the spiral ribbon. Several spiral ribbons 2 can be placed inside it to form a spiral ribbon inclined tube 3 together with the central cylinder, which serves as a space for the flow and sedimentation separation of the two-phase fluid mixture. Figure 1 , Figure 8a , Figure 8b shown.

[0085] It should be noted that the innermost cylinder 1 of the module can be the central cylinder 4, or a cylinder with a larger diameter than the central cylinder 4. The cylinder and the spiral belt may not be arranged inside the cylinder, and it only serves as a channel for inlet and outlet of materials to form an annular sedimentation module, such as Figure 6a , Figure 6b , Figure 7a , Figure 7b shown.

[0086] Specifically, the coaxial cylinder and spiral ribbon structure parameters of the integrated spiral ribbon inclined tube sedimentation module are as follows: Figure 2 As shown:

[0087] (1) In this embodiment, the integrated spiral ribbon inclined tube sedimentation module is composed of 5 coaxial cylinders 1 (including 1 central cylinder) and 6 layers of spiral ribbons 2 (including spiral ribbons in the central cylinder), which can be adjusted according to needs in actual applications;

[0088] (2) In this embodiment, the gap between any adjacent coaxial cylinders is equal to the width C of the spiral ribbon 2;

[0089] ⑶ In this embodiment, the width C of the spiral ribbon 2 ranges from 30 to 100 mm, and the width of the spiral ribbon 2 between any two adjacent cylinders is equal;

[0090] (4) In this embodiment, the inclination angle β of the spiral ribbon (the angle between the spiral ribbon and the horizontal plane) is 45°.

[0091] It should be noted that the general inclination angle β of ribbon 2 (the angle between the ribbon and the horizontal plane) ranges from 15 to 75°; according to the shallow pond sedimentation theory, the smaller the inclination angle of the ribbon, the better the separation effect, but the flow resistance of the heavy phase fluid of the dispersed phase downward or the light phase fluid upward also increases significantly. In order to ensure the smooth flow of the heavy phase fluid of the dispersed phase downward or the light phase fluid upward, the appropriate inclination angle β can be selected according to the viscosity characteristics of the heavy phase fluid or the light phase fluid of the dispersed phase. In general, for liquid-liquid separation and gas-liquid separation, the inclination angle β of ribbon 2 is preferably 15 to 45°, or even smaller; for solid-liquid separation, when using downward flow operation, the inclination angle β of ribbon 2 is preferably 45°; when using upward flow operation, for systems with small viscosity characteristics of solid precipitation, the inclination angle β of ribbon 2 is preferably 45°, and for systems with large viscosity characteristics of solid precipitation, the inclination angle β of ribbon 2 is preferably 60°;

[0092] (5) In this embodiment, the spiral ribbons 2 between adjacent coaxial cylinders 1 are arranged equidistantly along the circumferential direction, and the number of spiral ribbons 2 is calculated according to the spacing (vertical spacing) B of adjacent spiral ribbons 2 on the vertical section of the spiral sedimentation channel being the same value or a value close to the width C of the spiral ribbon 2. The corresponding horizontal spacing F of the spiral ribbons 2 is approximately calculated as follows: F=C / sinβ; the number of spiral ribbons 2 between different adjacent coaxial cylinders 1 and the vertical spacing B and horizontal spacing F of adjacent spiral ribbons 2 are, in principle, calculated and determined according to the hydraulic diameters of the vertical section of the spiral sedimentation channel being close;

[0093] (6) In this embodiment, the height of the module and the spiral belt 2 is H, the unfolded length of the spiral belt 2 is L, and the calculation formula of L is: L = H / sinβ.

[0094] ⑺In this embodiment, the direction of the spiral ribbon 2 is right-handed, and all the spiral ribbons have the same rotation direction;

[0095] It should be noted that in actual applications, the direction of the spiral ribbon 2 can be left-handed or right-handed, and the spiral directions of the spiral ribbon-type inclined tubes 3 between different adjacent coaxial cylinders 1 can be the same or different, preferably the same direction;

[0096] ⑻In this embodiment, the cross-sectional shape of the spiral ribbon is a straight line;

[0097] It should be noted that the cross-sectional shape of the spiral ribbon 2 can be a straight line, a broken line, a semicircle, a semi-ellipse, a semi-regular polygon or other special-shaped cross-section, and the concave side of the cross-sectional shape of the spiral sedimentation channel is used as the main contact portion with the aggregated dispersed phase, and the existence of an acute angle in the cross-sectional area of ​​the spiral ribbon inclined tube 3 in contact with the aggregated dispersed phase is avoided as much as possible, so as to minimize the sliding resistance between the aggregated dispersed phase and the spiral ribbon inclined tube 3;

[0098] ⑼ In this embodiment, the module is made of a thin-walled material with a polished surface that can ensure the rigidity of the module. Metal or non-metal materials can be used to minimize the weight of the module and reduce the downward flow resistance of the heavy phase fluid of the dispersed phase or the upward flow resistance of the light phase fluid;

[0099] Embodiment 2

[0100] like Figures 3 to 5 As shown, the present invention provides a combined spiral ribbon inclined tube sedimentation module and a spiral ribbon inclined tube partitioned sedimentation module. The overall structure and appearance of the module of the second embodiment are the same as those of the first embodiment, except that: the first embodiment is an integrated spiral ribbon inclined tube sedimentation module, while the second embodiment is a combined spiral ribbon inclined tube sedimentation module, which is composed of four cylindrical spiral ribbon sub-modules 10 and one central cylindrical spiral ribbon sub-module 20 nested and assembled;

[0101] (1) In this embodiment, Figure 3 As shown, the combined spiral ribbon inclined tube sedimentation module is composed of a number of standardized and serialized cylindrical spiral ribbon submodules 10 of different specifications divided by different diameters and a central cylindrical spiral ribbon submodule 20 which are nested and assembled in sequence according to the diameter size. The coaxial cylinders 1 of adjacent submodules and the spiral ribbons 2 of the inner submodule are closely matched to form a number of spiral sedimentation channels, namely, spiral ribbon inclined tubes 3, which serve as the flow and sedimentation separation space of the two-phase fluid mixture medium, and achieve the same separation effect as conventional inclined plates (tubes) or fillers;

[0102] (2) In this embodiment, Figure 4 As shown, the cylindrical spiral ribbon sub-module 10 is composed of a vertical coaxial cylinder 1 and a plurality of spiral ribbons 2 which are welded or bonded to the outer wall of the cylinder at equal intervals and in parallel along the circumference of the cylinder, forming a standardized series of sub-modules according to the diameter size; the cylindrical spiral ribbon sub-module 10 and the inner wall of the cylinder or cylindrical device of the cylindrical spiral ribbon sub-module 10 adjacent to the outer side form a plurality of spiral ribbon inclined tubes 3; the inner diameter of the cylinder of the smallest cylindrical spiral ribbon sub-module 10 is twice the width of the spiral ribbon 2.

[0103] ⑶ In this embodiment, if Figure 5 As shown, the central barrel spiral ribbon submodule 20 is composed of a plurality of spiral ribbons 2 wound around the central axis of the spiral ribbon, the module diameter is twice the width of the spiral ribbon, and is installed in the cylinder of the smallest cylindrical spiral ribbon submodule 10, and the two together constitute a plurality of spiral ribbon inclined tubes 3;

[0104] (4) In this embodiment, the cylindrical spiral ribbon submodule 10 with the largest diameter in the combined spiral ribbon inclined tube sedimentation module and the cylinder of the vertical cylindrical device form a plurality of spiral ribbon inclined tubes 3;

[0105] It should be particularly noted that the innermost cylindrical spiral ribbon submodule 10 in the combined spiral ribbon inclined tube sedimentation module can be a minimum cylindrical spiral ribbon submodule 10 whose inner diameter is twice the spiral ribbon width, or a cylindrical spiral ribbon submodule 10 with a larger diameter than the minimum cylindrical spiral ribbon submodule 10. No submodule may be arranged in the submodule, which only serves as a channel for inlet and outlet of materials to form an annular sedimentation module, such as Figure 6a , Figure 6b , Figure 7a , Figure 7b shown.

[0106] Compared with the integrated screw-ribbon inclined tube sedimentation module of Example 1, the combined screw-ribbon inclined tube sedimentation module of Example 2 and the screw-ribbon inclined tube partitioned sedimentation module have the advantages of realizing standardization and serialization of the manufacturing of modules and screw-ribbon inclined tube partitioned sedimentation modules, and can be assembled on-site according to the actual situation on site, which is convenient for selection, installation, maintenance or replacement, thereby improving the application scope of the combined sedimentation module.

[0107] The other structures of the second embodiment are the same as those of the first embodiment, and will not be described in detail here.

[0108] Embodiment 3

[0109] This embodiment is a combined spiral ribbon inclined tube sedimentation module, which is assembled by nesting cylindrical spiral ribbon submodules 10. Figure 6a , Figure 6b As shown, in this embodiment:

[0110] (1) The module is composed of 9 cylindrical spiral submodules 10 with an inner diameter of 100 to 900 mm nested;

[0111] (2) The central barrel spiral ribbon module 20 is not provided in the cylindrical spiral ribbon module 10 with an inner diameter of 100 mm, and the cylinder thereof is only used as a material inlet and outlet channel;

[0112] ⑶ Other structural characteristics data are shown in Table 1;

[0113] (4) This embodiment can adopt downward flow and upward flow operation modes.

[0114] When using the downflow mode, Figure 6a The two-phase mixture enters the module from the top of the module, the dispersed phase gathers in the module and separates from the continuous phase by sedimentation, the heavy phase fluid is discharged from the bottom of the module, the light phase fluid is also discharged from the bottom of the module, and then discharged from the top of the module through the cylinder of the cylindrical spiral belt submodule 10 with an inner diameter of 100 mm, thereby realizing the separation of the light and heavy phase fluid mixture.

[0115] When using the upflow mode, Figure 6bThe two-phase mixture enters the module from the bottom through the cylinder of the cylindrical spiral belt submodule 10 with an inner diameter of 100 mm. The dispersed phase gathers in the module and separates from the continuous phase by sedimentation. The heavy phase fluid is discharged from the bottom of the module, and the light phase fluid is discharged from the top of the module, thereby achieving the separation of the light and heavy phase fluid mixture.

[0116] It should be noted that the module can also be manufactured according to an integrated spiral ribbon inclined tube sedimentation module.

[0117] Embodiment 4

[0118] This embodiment is a combined spiral ribbon inclined tube sedimentation module, which is assembled by nesting cylindrical spiral ribbon submodules 10. Figure 7a , Figure 7b As shown, the difference between the fourth embodiment and the third embodiment is that:

[0119] (1) The module is composed of 6 cylindrical spiral submodules 10 with an inner diameter of 400 to 900 mm nested;

[0120] (2) There is no other submodule in the cylindrical spiral submodule 10 with an inner diameter of 400 mm, and its cylinder is only used as a material inlet and outlet channel;

[0121] (3) The cross section of the spiral ribbon in the fourth embodiment is a broken line, and the cross section of the spiral ribbon in the third embodiment is a straight line. Other distinguishing structural feature data are shown in Table 1;

[0122] (4) This embodiment can adopt downward flow and upward flow operation modes.

[0123] When using the downflow mode, Figure 7a The two-phase mixture enters the module from the top of the module, the dispersed phase gathers in the module and separates from the continuous phase by sedimentation, the heavy phase fluid is discharged from the bottom of the module, the light phase fluid is also discharged from the bottom of the module, and then discharged from the top of the module through the cylinder of the cylindrical spiral belt submodule 10 with an inner diameter of 400 mm, thereby realizing the separation of the light and heavy phase fluid mixture.

[0124] When using the upflow mode, Figure 7b The two-phase mixture enters the module from the bottom through the cylinder of the cylindrical spiral belt submodule 10 with an inner diameter of 400 mm. The dispersed phase gathers in the module and separates from the continuous phase by sedimentation. The heavy phase fluid is discharged from the bottom of the module, and the light phase fluid is discharged from the top of the module, thereby realizing the separation of the light and heavy phase fluid mixture.

[0125] It should be noted that the module can also be manufactured according to an integrated spiral ribbon inclined tube sedimentation module.

[0126] Embodiment 5

[0127] This embodiment is a combined spiral ribbon inclined tube sedimentation module, which is assembled by nesting a cylindrical spiral ribbon submodule 10 and a central cylindrical spiral ribbon submodule 20. Figure 8a , Figure 8b As shown, the difference between the fifth embodiment and the third embodiment is that:

[0128] (1) The module is composed of 6 cylindrical spiral submodules 10 with an inner diameter of 100 to 900 mm nested;

[0129] (2) A central cylindrical spiral tape module 20 is arranged inside the cylindrical spiral tape module 10 with an inner diameter of 100 mm;

[0130] (3) The cross section of the spiral ribbon in Example 5 is a semi-regular hexagon with an inclination angle of 60°, while the cross section of the spiral ribbon in Example 3 is a straight line with an inclination angle of 45°. Other distinguishing structural feature data are shown in Table 1;

[0131] (4) This embodiment can adopt downward flow and upward flow operation modes.

[0132] When using the downflow mode, Figure 8b The two-phase mixture enters the module from the top of the module, the dispersed phase gathers in the module and settles and separates from the continuous phase, the heavy phase fluid and the light phase fluid separate and layer at the bottom of the module and are discharged separately, thus realizing the separation of the light and heavy phase fluid mixture.

[0133] When using the upflow mode, Figure 8a The two-phase mixture enters the module from the bottom of the module, the dispersed phase gathers in the module and separates from the continuous phase by sedimentation, the heavy phase fluid is discharged from the bottom of the module, and the light phase fluid is discharged from the top of the module, thereby achieving the separation of the light and heavy phase fluid mixture.

[0134] It should be noted that the module can also be manufactured according to an integrated spiral ribbon inclined tube sedimentation module.

[0135]

[0136]

[0137] Embodiment 6

[0138] like Fig. 9 As shown, the present invention provides a spiral ribbon inclined tube partitioned sedimentation module, in this embodiment:

[0139] (1) The spiral ribbon inclined tube partition sedimentation module is divided into two functional physical partitions, inner and outer, by a coaxial isolation tube 5. The outer partition is an annular partition surrounding the inner partition. The inner and outer partitions are connected at the bottom and physically isolated at the top by the coaxial isolation tube 5.

[0140] ⑵The two functional partitions are the coarse partition and the purification partition. The outer ring partition is the coarse partition, and the inner partition is the purification partition. The purification partition has a higher module height than the coarse partition.

[0141] It should be noted that both the inner and outer partitions can be used as coarse partitions or purification zones, one of the partitions is used as the coarse partition and the other partition is used as the purification zone.

[0142] ⑶ The coarse partition is used to separate the dense two-phase fluid, adopting the downward flow operation mode, and the spiral ribbon inclination angle is 45°; the purification zone is used to further separate the dilute two-phase fluid discharged from the coarse partition, adopting the upward flow operation mode, and the spiral ribbon inclination angle is 60°; the cross-section shape of the spiral ribbon of the inner and outer partitions is semicircular;

[0143] It should be noted that the module can be manufactured according to an integrated spiral ribbon inclined tube sedimentation module, or can be assembled by nesting submodules of a combined spiral ribbon inclined tube sedimentation module; the two partitions can adopt different spiral ribbon cross-sectional shapes, heights, widths, quantities, inclinations and flow cross-sectional ratios according to the requirements of the separation tasks undertaken;

[0144] The module further improves its adaptability to two-phase fluid mixtures through functional partitioning. It is suitable for separating two-phase mixtures with a large content of dispersed phase (generally heavy phase). The two-phase mixture (thick phase mixture) passes through the coarse partition from the top to the bottom of the coarse partition. Most of the dispersed phase gathers in the coarse partition and separates by sedimentation with the continuous phase (generally light phase) and is discharged from the bottom of the coarse partition. The two-phase mixture (dilute phase mixture) containing a small amount of dispersed phase material obtained below the coarse partition passes through the purification zone from the bottom of the purification zone to the top. The dispersed phase gathers in the purification zone and separates by sedimentation with the continuous phase. The clarified fluid (generally light phase) is discharged from the top of the purification zone, and the dispersed material is discharged from the bottom of the purification zone.

[0145] Embodiment 7

[0146] This embodiment is a spiral ribbon inclined tube partition sedimentation module, such as Fig.10 As shown, the difference between the seventh embodiment and the sixth embodiment is that:

[0147] (1) In this embodiment, the inner partition is a rough partition, the annular outer partition is a purification zone, and the outer partition has a higher module height than the inner partition;

[0148] (2) In this embodiment, the spiral ribbon of the inner partition (coarse partition) has an inclination angle of 45°, and the spiral ribbon of the outer partition (purification zone) has an inclination angle of 60°;

[0149] ⑶ In this embodiment, there are two feeds, a dense phase mixture and a dilute phase mixture, to adapt to different application scenarios. The dense phase mixture enters from the top of the inner partition (coarse partition), the dilute phase mixture enters from the bottom of the outer partition (purification zone), and the light phase is discharged from the top of the outer partition (purification zone);

[0150] The other structures of the seventh embodiment are the same as those of the sixth embodiment and will not be described in detail here.

[0151] Embodiment 8

[0152] This embodiment is a spiral ribbon inclined tube partition sedimentation module, such as Fig.11 As shown, the difference between the eighth embodiment and the sixth and seventh embodiments is that:

[0153] (1) In the eighth embodiment, the special data of the module is more specific, and the sixth and seventh embodiments more show the structural characteristics and application scenarios of the module;

[0154] (2) The structural characteristic data of this embodiment 8 are shown in Table 2 below.

[0155] The structural features of the modules of the eighth embodiment are consistent with those of the sixth embodiment and will not be described in detail here.

[0156]

Claims

1. A spiral ribbon inclined tube sedimentation module for two-phase fluid sedimentation separation, characterized in that: The spiral ribbon inclined tube sedimentation module includes a plurality of vertical coaxial cylinders nested with equal gaps and a plurality of parallel spiral ribbons circumferentially arranged at equal intervals between adjacent coaxial cylinders. In the module, independent spiral sedimentation channels, namely spiral ribbon inclined tubes, are formed between adjacent coaxial cylinders and adjacent parallel spiral ribbons, serving as a space for flow and sedimentation separation of a two-phase fluid mixture medium, so as to achieve a separation effect with an inclined plate or filler. At the same time, the spiral directional flow of the fluid forms a cyclonic sedimentation effect, so as to enhance the separation effect of the two-phase fluid mixture.

2. The spiral ribbon inclined tube sedimentation module according to claim 1, characterized in that: The spiral-ribbon inclined tube sedimentation module is an integrated spiral-ribbon inclined tube sedimentation module, which is formed by welding or bonding a plurality of coaxial cylinders and a plurality of spiral ribbons as a whole; wherein, the outermost side of the module is not provided with a cylinder, and the largest cylinder and the inner wall of the cylindrical equipment and the spiral ribbons therebetween constitute a plurality of spiral-ribbon inclined tubes; the cylinder with the smallest diameter in the module is the central cylinder, and the inner diameter of the central cylinder is twice the width of the spiral ribbon, and a plurality of spiral ribbons can be placed inside the central cylinder to form a spiral-ribbon inclined tube together with the central cylinder.

3. The screw-belt inclined tube sedimentation module according to claim 1, characterized in that: The spiral ribbon inclined tube sedimentation module is a combined spiral ribbon inclined tube sedimentation module, which is composed of a number of cylindrical spiral ribbon sub-modules of different specifications divided by different diameters and a central cylindrical spiral ribbon sub-module, which are nested and assembled in sequence according to the diameter size; wherein the cylindrical spiral ribbon sub-module is composed of a vertical coaxial cylinder and a number of spiral ribbons welded or bonded to the outer wall of the cylinder at equal distances and in parallel along the circumference of the cylinder, forming a standardized series of sub-modules according to the diameter size; the cylindrical spiral ribbon sub-module and the inner wall of the cylinder or cylindrical equipment of the cylindrical spiral ribbon sub-module adjacent to the outside form a number of spiral ribbon inclined tubes; the inner diameter of the cylinder of the smallest cylindrical spiral ribbon sub-module is twice the width of the spiral ribbon; the central cylindrical spiral ribbon sub-module is composed of a number of spiral ribbons wrapped around the central axis of the spiral ribbon, the module diameter is twice the width of the spiral ribbon, and is installed in the cylinder of the smallest cylindrical spiral ribbon sub-module, and the two together constitute a number of spiral ribbon inclined tubes.

4. The screw-belt inclined tube sedimentation module according to claim 2, characterized in that: The innermost cylinder of the spiral ribbon inclined tube sedimentation module is the central cylinder, or a cylinder with a larger diameter than the central cylinder. No cylinder, spiral ribbon or sub-module may be arranged in the cylinder, which only serves as a channel for entering and exiting materials to form an annular sedimentation module.

5. The screw-belt inclined tube sedimentation module according to claim 2, characterized in that: The spiral inclination angle β (the angle between the spiral and the horizontal plane) ranges from 15 to 75°, and the spiral direction of the spiral can be left-handed or right-handed. The spiral directions of the spirals between different adjacent coaxial cylinders are the same or different.

6. The screw-belt inclined tube sedimentation module according to claim 2, characterized in that: The width of the spiral ribbon between any two adjacent cylinders is the same, and the gap between any adjacent coaxial cylinders is the same and equal to the spiral ribbon width C. The value range of the spiral ribbon width C is: 30 to 100 mm.

7. The screw-belt inclined tube sedimentation module according to claim 1, characterized in that: The spiral ribbons between adjacent coaxial cylinders are arranged equidistantly along the circumferential direction, and the number of spiral ribbons is calculated based on the vertical spacing B between adjacent spiral ribbons on the vertical section of the spiral sedimentation channel being the same value or a close value to the spiral ribbon width C. The corresponding horizontal spacing F of the spiral ribbons is approximately calculated as follows: F=C / sinβ; the number of spiral ribbons between different adjacent coaxial cylinders and the vertical spacing B and horizontal spacing F of adjacent spiral ribbons are, in principle, calculated and determined based on the close hydraulic diameters of the vertical section of the spiral sedimentation channel.

8. The screw-belt inclined tube sedimentation module according to claim 7, characterized in that: The cross-sectional shape of the spiral ribbon is semicircular, semi-elliptical, semi-regular polygonal, straight line or broken line.

9. The screw-belt inclined tube sedimentation module according to claim 8, characterized in that: The module is made of a thin-walled material with a polished surface that can ensure the rigidity of the module. Metal or non-metal materials can be used to minimize the weight of the module and reduce the downward flow resistance of the heavy phase fluid of the dispersed phase or the upward flow resistance of the light phase fluid.

10. A spiral ribbon inclined tube partition sedimentation module for two-phase fluid sedimentation separation, characterized in that: The screw-belt inclined tube partitioned sedimentation module adopts the screw-belt inclined tube sedimentation module described in any one of claims 1 to 9, which is divided into two functional physical partitions, inner and outer, by a coaxial isolation tube. The outer partition is an annular partition surrounding the inner partition. The inner and outer partitions are connected at the bottom and physically isolated at the top by the coaxial isolation tube; wherein, the two functional partitions are a coarse partition and a purification partition, respectively, and both the inner and outer partitions can be used as coarse partitions or purification partitions, one of the partitions is used as a coarse partition, and the other partition is used as a purification partition.

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