A screw-belt inclined-tube sedimentation module and a screw-belt inclined-tube partition sedimentation module

Abstract

The present invention relates to a spiral ribbon inclined tube sedimentation module and a spiral ribbon inclined tube partitioned sedimentation module, which relate to the field of chemical separation technology, and are used to solve the problems of low equipment space utilization when conventional inclined plates (tubes) or fillers are used in this field, and can achieve standardization and serialization of modules and manufacturing. The module is composed of a number of coaxial cylinders nested with equal gaps and a number of spiral ribbons arranged at equal distances between adjacent cylinders. The spiral ribbon inclined tubes formed between adjacent cylinders and adjacent spiral ribbons achieve the same separation effect as conventional inclined plates (tubes) or fillers, and the spiral directional flow of the fluid further enhances the separation effect. The separation effect of the module is only related to the module height and the spiral ribbon inclination angle, but has nothing to do with the equipment diameter. It can make full use of the vertical space to improve the separation effect and efficiency by increasing the module height and reducing the spiral ribbon inclination angle, thereby reducing the equipment size and improving the space utilization of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical separation technology, in particular to a spiral belt type inclined tube settling module and a spiral belt type inclined tube partition settling module, which can be installed in a vertical cylindrical chemical equipment with toxic and harmful, flammable and explosive medium, and which is used for settling separation of two-phase fluid mixture under the conditions of closed, high temperature, pressurization or vacuum. BACKGROUND

[0002] The inclined plate (tube) or packing designed according to the shallow pool settling theory has been widely used in the field of water treatment, which greatly improves the efficiency of settling separation of water treatment system and greatly reduces the size and floor area of water treatment facilities.

[0003] However, the conventional inclined plate (tube) or packing is less used in the field of chemical industry, mainly because:

[0004] In the field of chemical industry, most of the media are toxic and harmful flammable hazardous chemicals, and most of the chemical separation processes are carried out under the conditions of closed, high temperature, pressurization or vacuum, and the container equipment is generally cylindrical pressure-resistant structure; and the conventional inclined plate (tube) or packing has the following problems when arranged in the cylindrical equipment or device.

[0005] (1) Low utilization rate of internal space of cylindrical equipment or device, small treatment capacity

[0006] Based on the shallow pool settling theory, in order to meet the separation requirements of two-phase fluid mixture, the conventional inclined plate (tube) or inclined plate (tube) packing needs to ensure the necessary straight flow path length, and at the same time has a certain inclination to facilitate the smooth flow of heavy phase fluid downward or light phase fluid upward, and the inclination is generally 15-75°. When the conventional inclined plate (tube) is arranged in the cylindrical container, due to the existence of the inclination of the inclined plate (tube), a large part of the internal space of the equipment is invalid space, the longer the flow path length of the inclined plate (tube) relative to the diameter of the equipment cylinder, the smaller the inclination, the lower the utilization rate of the cross section of the equipment, the lower the utilization rate of the internal space of the equipment, and the smaller the treatment capacity.

[0007] (2) Large floor area of equipment or device, low height, low vertical space utilization

[0008] Based on the shallow pool settling theory, the higher the separation effect requirement of the conventional inclined plate (tube) or packing, the longer the straight flow path of the inclined plate (tube) needs, the smaller the inclination, and the larger the horizontal size of the required equipment; in order to meet the treatment 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 requirement to ensure the smooth flow of heavy phase fluid downward or light phase fluid upward; thereby resulting in large floor area of the equipment, low height, and low vertical space utilization of the device.

[0009] In summary, the conventional inclined plate (tube) or packing arranged in the vertical cylindrical device has the problems and limitations of low internal space utilization, small processing capacity, large equipment floor area, low height, and low vertical space utilization of the device.

[0010] Although the conventional inclined plate (tube) or packing has the above problems and limitations, due to the full use of gravity, it has characteristics such as low operating cost, fewer moving devices in the process, and fewer supporting devices. Therefore, researchers have proposed many improved methods and ideas to improve the limitations of application in cylindrical chemical devices, but there are still various applicability problems. SUMMARY

[0011] The present application provides a spiral-belt inclined-tube settling module and a spiral-belt inclined-tube partitioned settling module for two-phase fluid settling separation, to solve the problems of low internal space utilization, small processing capacity, large equipment floor area, low height, and low vertical space utilization of the device caused by the arrangement of the conventional inclined plate (tube) or packing in the vertical cylindrical device.

[0012] The present application provides a spiral-belt inclined-tube settling module for two-phase fluid settling separation, which is composed of a plurality of equal-interval nested vertical coaxial cylinders and a plurality of parallel spiral belts arranged equidistantly in the circumferential direction between adjacent coaxial cylinders. The module forms independent spiral settling channels, i.e., spiral-belt inclined-tubes, between adjacent coaxial cylinders and adjacent parallel spiral belts, as the space for the flow and settling separation of two-phase fluid mixture medium, achieving the same separation effect as the conventional inclined plate (tube) or packing. At the same time, the cyclone settling effect formed by the spiral flow of the fluid further enhances the separation effect of the two-phase fluid mixture. The module can adopt upward flow operation mode or downward flow operation mode to adapt to different application scenarios.

[0013] In one embodiment, the spiral-belt inclined-tube settling module is a one-piece spiral-belt inclined-tube settling module, which is formed by a plurality of coaxial cylinders and a plurality of spiral belts by integral welding or bonding. Among them, the outermost side of the module is not provided with a cylinder, and the spiral belt between the largest cylinder and the inner wall of the cylindrical device constitutes a plurality of spiral-belt inclined-tubes. The smallest cylinder in the module is the center cylinder, and the inner diameter of the center cylinder is 2 times the width of the spiral belt. A plurality of spiral belts can be placed inside the center cylinder to form a spiral-belt inclined-tube together with the center cylinder.

[0014] In one embodiment, the screw-belt inclined-tube settling module is a combined screw-belt inclined-tube settling module, which is assembled by several cylinder screw-belt sub-modules of different specifications divided by different diameters and a central cylinder screw-belt sub-module in order of diameter size; wherein the cylinder screw-belt sub-module is composed of a vertical coaxial cylinder and several screw belts welded or bonded in parallel on the outer wall of the cylinder at equal intervals along the circumference of the cylinder, forming a standardized series of sub-modules by diameter size; the cylinder screw-belt sub-module and the cylinder or inner wall of the cylindrical equipment of the adjacent cylinder screw-belt sub-module on the outside form several screw-belt inclined-tubes; the inner diameter of the cylinder of the smallest cylinder screw-belt sub-module is 2 times the width of the screw belt; the central cylinder screw-belt sub-module is composed of several screw belts around the screw belt center axis, and the diameter of the module is 2 times the width of the screw belt, which is installed in the cylinder of the smallest cylinder screw-belt sub-module, and both of them together form several screw-belt inclined-tubes.

[0015] In one embodiment, the innermost cylinder of the screw-belt inclined-tube settling module is a central cylinder, or a cylinder with a larger diameter than the central cylinder, and no cylinder, screw belt or sub-module can be arranged in the cylinder, which only serves as a passage for the incoming and outgoing materials, forming an annular settling module.

[0016] In one embodiment, the screw-belt inclination angle (the angle between the screw belt and the horizontal plane) β is in the range of 15-75°, and the screw helical direction can be left-handed or right-handed, and the screw helical directions of different adjacent coaxial cylinders can be the same or different.

[0017] In one embodiment, the screw belt width between any two adjacent cylinders is the same, and the gap between any two adjacent coaxial cylinders is the same and equal to the screw belt width C, and the screw belt width C is in the range of 30-100 mm.

[0018] In one embodiment, the screw belts between adjacent coaxial cylinders are arranged at equal intervals in the circumferential direction, and the number of screw belts is calculated according to the vertical distance B between adjacent screw belts on the vertical cross section of the helical settling channel and the screw belt width C, and the corresponding horizontal distance F of the screw belts is approximately calculated by the formula: F = C / sinβ; and the values of the number of screw belts, the vertical distance B and the horizontal distance F between adjacent screw belts for different adjacent coaxial cylinders are determined according to the principle that the vertical cross section of the helical settling channel has a close hydraulic diameter.

[0019] In one embodiment, the cross-sectional shape of the screw belt is semicircular, semi-elliptical, semi-regular polygon, straight line or broken line.

[0020] In one embodiment, the module is made of thin-walled material with surface polishing to ensure the rigidity of the module, which can be made of metal or non-metal material to minimize the weight of the module and reduce the flow resistance of the dispersed phase to the downward or the light phase to the upward.

[0021] The application also provides a spiral-belt inclined-tube partitioned settling module for two-phase fluid settling separation, which is divided into two functional physical partitions by coaxial isolation cylinders, and the outer partition is a ring-shaped partition surrounding the inner partition, and the lower parts of the two partitions are connected and the upper parts are physically isolated by the coaxial isolation cylinders; wherein the two functional partitions are coarse partition and purification zone respectively, and the two partitions can be used as coarse partition or purification zone, one of which is used as coarse partition and the other is used as purification zone.

[0022] In one embodiment, the coarse partition is used for separating thick-phase two-phase fluid and adopts downward flow operation mode; and the purification zone is used for further separating the thin-phase two-phase fluid discharged by the coarse partition and the thin-phase two-phase fluid feed and adopts upward flow operation mode.

[0023] In one embodiment, the two partitions can adopt different spiral-belt cross-sectional shapes, heights, widths, numbers, inclination angles and flow passage cross-sectional ratios according to the requirements of separation tasks.

[0024] In one embodiment, the spiral-belt inclined-tube settling module is manufactured according to the integrated spiral-belt inclined-tube settling module or is assembled by nesting the combined spiral-belt inclined-tube settling module sub-modules.

[0025] The spiral-belt inclined-tube settling module provided by the application can be an integrated spiral-belt inclined-tube settling module,

[0026] (1) the module is welded or bonded by a plurality of vertical coaxial cylinders with equal gaps and a plurality of parallel spiral belts or special-shaped cross-section spiral belts arranged equidistantly in the circumferences between adjacent coaxial cylinders;

[0027] (2) the module forms a plurality of spiral settling channels, i.e. spiral-belt inclined-tubes, which are independent of each other and are not connected to each other except the upper and lower ends of the cylinders, between the adjacent coaxial cylinders and the adjacent parallel spiral belts, as the space for the flow and settling separation of two-phase fluid mixture, and achieves the same separation effect as the conventional inclined plate (tube) or filler;

[0028] (3) the outermost side of the module can not be provided with a cylinder, and the spiral belts 2 between the largest cylinder and the inner wall of the cylindrical equipment form a plurality of spiral-belt inclined-tubes.

[0029] (4) the smallest diameter cylinder in the module is a center cylinder, the inner diameter of which is twice the width of the spiral belt, and a plurality of spiral belts can be placed in the center cylinder to form spiral-belt inclined-tubes as the space for the flow and settling separation of two-phase fluid mixture;

[0030] (5) the innermost side cylinder of the module can be a center cylinder or a cylinder with a larger diameter than the center cylinder, and no cylinder or spiral belt can be arranged in the cylinder, which only serves as a channel for feeding and discharging materials to form a ring-shaped settling 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] ⑵ The cylindrical spiral ribbon sub-module consists of a vertical coaxial cylinder and several 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 several 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 cylindrical spiral ribbon submodule is composed of several 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 form several spiral ribbon inclined tubes.

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

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

[0036] ⑹ 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 convenient for selection, installation, maintenance or replacement, thereby improving the scope of application of the combined sedimentation module.

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

[0038] ⑴The module is divided into two functional physical partitions, the inner and outer partitions, 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 zones are the coarse zone and the purification zone. Both the inner and outer zones can be used as coarse zones or purification zones. One zone is used as the coarse zone and the other is used as the purification zone.

[0040] ⑶ The coarse partition is used for separating the thick-phase two-phase fluid, and adopts a downward flow operation mode; the purification zone is used for further separating the thin-phase two-phase fluid discharged from the coarse partition and the thin-phase two-phase fluid feed, and adopts an upward flow operation mode;

[0041] ⑷ The two partitions can adopt different screw belt section shapes, heights, widths, numbers, inclination angles and flow passage section ratios according to the separation task requirements;

[0042] ⑸ The module can be manufactured in an integrated screw belt inclined pipe settling module, or can be assembled by nesting sub-modules of a combined screw belt inclined pipe settling module.

[0043] ⑹ The thick-phase mixture and the thin-phase mixture can be processed, so as to adapt to different application scenarios. The thick-phase mixture enters from above the coarse partition, the thin-phase mixture enters from below the purification zone, and the light phase is discharged from above the purification zone;

[0044] The present application provides a screw belt inclined pipe settling module and a coaxial cylinder and a screw belt in the screw belt inclined pipe partition settling module.

[0045] ⑴ The screw belt inclination angle (the angle between the screw belt and the horizontal plane) β is in the range of 15-75°, the screw belt spiral direction can be left-handed or right-handed, the screw belt spiral directions of different adjacent coaxial cylinders 1 can be the same or different, and the same direction is preferred.

[0046] For liquid-liquid separation and gas-liquid separation, the screw belt inclination angle β is preferably 15-45°, or even smaller; for solid-liquid separation, when using downward flow operation, the screw belt inclination angle β is preferably 45°; when using upward flow operation, for the system with small solid deposition adhesion characteristics, the screw belt inclination angle β is preferably 45°, and for the system with large solid deposition adhesion characteristics, the screw belt inclination angle β is preferably 60°.

[0047] ⑵ The screw belt width between any two adjacent cylinders is the same, the gap between any two adjacent coaxial cylinders is the same and equal to the screw belt width C, and the screw belt width C is in the range of 30-100 mm.

[0048] ⑶ The screw belts between adjacent coaxial cylinders are arranged equidistantly in the circumferential direction, the number of screw belts is calculated according to the same value or close value of the vertical spacing B of adjacent screw belts on the vertical section of the spiral settling channel and the screw belt width C, and the corresponding screw belt horizontal spacing F is calculated according to the approximate formula: F=C / sinβ; for the number of screw belts between different adjacent coaxial cylinders 1 and the vertical spacing B and horizontal spacing F of adjacent screw belts, in principle, the vertical section of the spiral settling channel is calculated and determined according to the close hydraulic diameter.

[0049] ⑷ The height of the module and the screw belt is H, and the unwinding length of the screw belt 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 accumulated dispersed phase. Try to avoid the existence of sharp angles in the cross-section of the contact part between the spiral ribbon inclined tube and the accumulated dispersed phase, so as to minimize the sliding resistance between the accumulated dispersed phase and the spiral ribbon inclined tube;

[0051] (6) The above-mentioned spiral ribbon inclined tube sedimentation module is made of thin-walled material with polished surface that can ensure the rigidity of the module. Metal or non-metallic 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.

[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 plates (tubes) or fillers commonly used in the water treatment field. Their theoretical basis is still the shallow pool sedimentation theory. They innovatively use a spiral sedimentation channel composed of coaxial cylinders and spiral ribbons equidistantly arranged between adjacent cylinders, namely spiral ribbon inclined tubes, to achieve the same separation effect as conventional inclined plates (tubes) or fillers. At the same time, the vortex 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 existing technology, the advantages of the present invention are:

[0053] (1) The spiral ribbon inclined tube sedimentation module consists of several vertical coaxial cylinders nested with equal gaps and several parallel spiral ribbons circumferentially arranged at equal distances 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 spiral ribbon inclined tube sedimentation module, when the coaxial cylinder height and the spiral ribbon inclination angle β are the same, 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 coaxial cylinder diameter 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 achieve standardization and serialization of module and screw-ribbon inclined tube partitioned sedimentation module manufacturing, can be assembled on-site according to actual site conditions, and is convenient for selection, installation, maintenance or replacement, thereby improving the scope of application of the combined sedimentation module.

[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 spiral ribbon inclined tube sedimentation module and spiral ribbon inclined tube partitioned sedimentation module, due to the use of spiral 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 the 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 with reference to the accompanying drawings.

[0060] Figure 1 This is a schematic diagram of the structural composition of the integrated spiral ribbon inclined tube sedimentation module in Example 1 of the present invention;

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

[0062] Figure 3 It is a schematic diagram of the three-dimensional structure and nesting 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 module;

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

[0065] Figure 6a and Figure 6b is a schematic diagram of the structure of the helical ribbon inclined tube settling module in Example Three;

[0066] Figure 7a and Figure 7b is a schematic diagram of the structure of the helical ribbon inclined tube settling module in Example Four;

[0067] Figure 8a and Figure 8b is a schematic diagram of the structure of the helical ribbon inclined tube settling module in Example Five;

[0068] Figure 9 is a schematic diagram of the structure of the helical ribbon inclined tube partitioned settling module in Example Six;

[0069] Figure 10 is a schematic diagram of the structure of the helical ribbon inclined tube partitioned settling module in Example Seven;

[0070] Figure 11 is a schematic diagram of the structure of the helical ribbon inclined tube partitioned settling module in Example Eight.

[0071] Reference signs:

[0072] 1, coaxial cylinder; 2, helical ribbon; 3, helical ribbon inclined tube; 4, central cylinder; 5, isolation cylinder;

[0073] 10, cylinder helical ribbon sub-module; 20, central cylinder helical ribbon sub-module. DETAILED DESCRIPTION

[0074] The application will be further described below with reference to the drawings.

[0075] Examples One and Two are used to illustrate the structural features of the integrated and combined helical ribbon inclined tube settling modules.

[0076] Examples Three, Four and Five are used to illustrate the structural features and application scenarios of the helical ribbon inclined tube settling modules.

[0077] Examples Six, Seven and Eight are used to illustrate the features and application scenarios of the helical ribbon inclined tube partitioned settling modules.

[0078] It should be particularly noted that although the application has been described with reference to the preferred embodiments, various modifications can be made to it and equivalent components can be substituted therefor without departing from the scope of the application. In particular, the technical features mentioned in each of the embodiments can be combined in any manner as long as there is no structural conflict. The application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0079] Embodiment One

[0080] As shown in the drawings, the present application provides an integrated screw-belted inclined-tube settling module. Figure 1

[0081] (1) The module is welded or bonded by several (i.e. 2 or more) equally-spaced nested vertical coaxial cylinders 1 and several parallel or special-section screw belts 2 arranged equidistantly and circumferentially between adjacent coaxial cylinders;

[0082] (2) In the module, several independent screw-settling channels, i.e. screw-belted inclined tubes 3, are formed between adjacent coaxial cylinders 1 and adjacent parallel screw belts 2, which are not connected to each other except for the upper and lower ends of the cylinders, serving as the space for the flow and settling separation of two-phase fluid mixtures, and achieving the same separation effect as conventional inclined plates (tubes) or fillers;

[0083] (3) The outermost side of the module can not be provided with a cylinder, and the largest coaxial cylinder 1 and the screw belt 2 between the inner wall of the cylindrical equipment form several screw-belted inclined tubes 3.

[0084] (4) The smallest diameter cylinder in the module is the center cylinder 4, and the inner diameter of the center cylinder is 2 times the width of the screw belt, and several screw belts 2 can be placed inside the center cylinder to form screw-belted inclined tubes 3 as the space for the flow and settling separation of two-phase fluid mixtures, as shown in Figure 1 , Figure 8a , Figure 8b .

[0085] It should be particularly noted that the innermost cylinder 1 of the module can be a center cylinder 4, or a cylinder with a larger diameter than the center cylinder 4, and no cylinder or screw belt can be arranged inside the cylinder, which only serves as a channel for the inlet and outlet of materials, forming an annular settling module, as shown in Figure 6a , Figure 6b , Figure 7a , Figure 7b .

[0086] Specifically, the structure parameters of the coaxial cylinders and screw belts of the integrated screw-belted inclined-tube settling module are shown in Figure 2 .

[0087] (1) In this embodiment, the integrated screw-belted inclined-tube settling module has 5 coaxial cylinders 1 (including 1 center cylinder) and 6 layers of screw belts 2 (including the screw belt in the center cylinder), which can be adjusted as needed in actual application;

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

[0089] (3) In this embodiment, the width C of the screw belt 2 is in the range of 30-100 mm, and the width of the screw belt 2 between any two adjacent cylinders is equal;

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

[0091] It should be noted that the angle of the spiral band 2 (the angle between the spiral band and the horizontal plane) β is generally in the range of 15-75°; according to the shallow pool sedimentation theory, the smaller the angle of the spiral band, 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 is also significantly increased. 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 angle β can be selected according to the viscous characteristics of the heavy phase fluid or the light phase fluid of the dispersed phase. Generally, for liquid-liquid separation and gas-liquid separation, the angle β of the spiral band 2 is preferably 15-45°, or even smaller; for solid-liquid separation, when using downward flow operation, the angle β of the spiral band 2 is preferably 45°; when using upward flow operation, for systems with small viscous characteristics of solid sediment, the angle β of the spiral band 2 is preferably 45°, and for systems with large viscous characteristics of solid sediment, the angle β of the spiral band 2 is preferably 60°;

[0092] In this embodiment, the spiral bands 2 are arranged equidistantly in the circumferential direction between adjacent coaxial cylinders 1, the number of the spiral bands 2 is calculated according to the same value or close value of the vertical spacing B of the adjacent spiral bands 2 on the vertical cross section of the spiral sedimentation channel and the width C of the spiral band 2, and the approximate calculation formula of the horizontal spacing F of the corresponding spiral band 2 is F=C / sinβ; the number of the spiral bands 2 between different adjacent coaxial cylinders 1 and the values of the vertical spacing B and the horizontal spacing F of the adjacent spiral bands 2 are determined according to the principle that the vertical cross section of the spiral sedimentation channel has a close hydraulic diameter;

[0093] In this embodiment, the height of the module and the spiral band 2 is H, and the development length of the spiral band 2 is L, and the calculation formula of L is L=H / sinβ.

[0094] In this embodiment, the direction of the spiral band 2 is right-handed, and the rotation directions of all the spiral bands are the same;

[0095] It should be noted that in actual application, the direction of the spiral band 2 can be left-handed or right-handed, and the spiral directions of the spiral band type inclined pipes 3 between different adjacent coaxial cylinders 1 can be the same or different, and the same direction is preferred;

[0096] In this embodiment, the cross-sectional shape of the spiral band is linear;

[0097] It should be noted that the cross-sectional shape of the spiral band 2 can be linear, polygonal, semicircular, semi-elliptical, semi-regular polygonal, etc. The concave side of the cross section of the spiral sedimentation channel is used as the main contact part with the aggregated dispersed phase, and the existence of acute angles in the contact part cross section between the spiral band type inclined pipe 3 and the aggregated dispersed phase is avoided as much as possible to minimize the sliding resistance between the aggregated dispersed phase and the spiral band type inclined pipe 3;

[0098] (9) 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-metallic 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;

[0099] Example 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 Example 2 are the same as those of Example 1. The difference is that Example 1 is an integrated spiral ribbon inclined tube sedimentation module, while Example 2 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 several standardized and serialized cylindrical spiral ribbon submodules 10 of different specifications divided by different diameters and a central cylinder 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 tightly matched to form several spiral sedimentation channels, namely spiral ribbon inclined tubes 3, which serve as spaces for the flow and sedimentation separation of the two-phase fluid mixture medium, achieving the same separation effect as conventional inclined plates (tubes) or packings.

[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 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 inner wall of the cylinder or cylindrical device of the cylindrical spiral ribbon sub-module 10 and the adjacent cylindrical spiral ribbon sub-module 10 on the outside forms 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 cylindrical spiral ribbon submodule 20 is composed of a number of spiral ribbons 2 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 10. The two together form a number 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 settling module and the cylinder of the vertical cylindrical device form a plurality of spiral ribbon inclined tubes 3;

[0105] It should be particularly pointed out that the innermost cylindrical screw ribbon sub-module 10 in the combined screw ribbon inclined tube settling module can be the smallest cylindrical screw ribbon sub-module 10 with the inner diameter of the cylinder being 2 times the width of the screw ribbon, or a cylindrical screw ribbon sub-module 10 with a larger diameter than the smallest cylindrical screw ribbon sub-module 10, and no sub-module can be arranged in the sub-module, which only serves as a channel for feeding and discharging materials to form an annular settling module, as shown in Figure 6a 、 Figure 6b 、 Figure 7a 、 Figure 7b .

[0106] The combined screw ribbon inclined tube settling module of Example Two has the advantages of standardization and serialization of the module and the screw ribbon inclined tube partition settling module compared with the integrated screw ribbon inclined tube settling module of Example One, can be assembled on site according to the actual situation on site, and is convenient for selection, installation, maintenance or replacement, thereby improving the application range of the combined settling module.

[0107] Example Two is the same as Example One in other structures, and will not be described here.

[0108] Example Three

[0109] This embodiment is a combined screw ribbon inclined tube settling module, which is assembled by nesting cylindrical screw ribbon sub-modules 10, as shown in Figure 6a 、 Figure 6b In this embodiment:

[0110] (1) the module is composed of 9 cylindrical screw ribbon sub-modules 10 with an inner diameter of 100-900 mm;

[0111] (2) the cylindrical screw ribbon sub-module 10 with an inner diameter of 100 mm is not provided with a central cylinder screw ribbon sub-module 20, and the cylinder thereof only serves as a feeding and discharging channel;

[0112] (3) other structural feature data are shown in Table 1;

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

[0114] When the downward flow mode is adopted, as shown in Figure 6a , the two-phase mixture enters the module from the upper part of the module, the dispersed phase is gathered in the module and separated from the continuous phase, the heavy phase fluid is discharged from the lower part of the module, and the light phase fluid is also discharged from the lower part of the module, and then discharged from the upper part of the module through the cylinder of the cylindrical screw ribbon sub-module 10 with an inner diameter of 100 mm, so as to realize the separation of the light and heavy phase fluid mixture.

[0115] When the upward flow mode is adopted, as shown in Figure 6b, two-phase mixture enters the module from the bottom of the module, the dispersed phase gathers in the module and is separated 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, so as to realize the separation of the light and heavy phase fluid mixture.

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

[0117] Example Four

[0118] This embodiment is a combined screw belt inclined tube sedimentation module, which is assembled by nesting the cylindrical screw belt sub-module 10, as shown in Figure 7a , Figure 7b The difference between example four and example three is:

[0119] (1) The module is composed of six cylindrical screw belt sub-modules 10 with an inner diameter of 400-900 mm;

[0120] (2) The cylindrical screw belt sub-module 10 with an inner diameter of 400 mm does not have any sub-module arranged therein, and the cylinder is only used as a feeding and discharging channel;

[0121] (3) The screw belt cross section of example four is a broken line, and the screw belt cross section of example three is a straight line, and other different structural feature data are shown in Table 1;

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

[0123] When the downward flow mode is adopted, as shown in Figure 7a , two-phase mixture enters the module from the top of the module, the dispersed phase gathers in the module and is separated from the continuous phase by sedimentation, the heavy phase fluid is discharged from the bottom of the module, and the light phase fluid is also discharged from the bottom of the module, and then the light and heavy phase fluid mixture is separated by the cylinder of the cylindrical screw belt sub-module 10 with an inner diameter of 400 mm from the top of the module.

[0124] When the upward flow mode is adopted, as shown in Figure 7b , two-phase mixture enters the module from the bottom of the module, the dispersed phase gathers in the module and is separated 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, so as to realize the separation of the light and heavy phase fluid mixture.

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

[0126] Example Five

[0127] This embodiment is a combined screw belt inclined tube sedimentation module, which is assembled by nesting the cylindrical screw belt sub-module 10 and the central cylinder screw belt sub-module 20, as shown inFigure 8a 、 Figure 8b As shown in Fig. 5, the embodiment five is different from the embodiment three in that:

[0128] (1) the module is composed of 6 cylinder screw ribbon sub-modules 10 with an inner diameter of 100-900 mm;

[0129] (2) the cylinder screw ribbon sub-module 10 with an inner diameter of 100 mm is provided with a central cylinder screw ribbon sub-module 20;

[0130] (3) the screw ribbon section in the embodiment five is a semi-regular hexagon with an inclination angle of 60°, and the screw ribbon section in the embodiment three is a straight line with an inclination angle of 45°, and other different structural feature data are shown in Table 1;

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

[0132] When the downward flow mode is adopted, as shown in Fig. 6, the two-phase mixture enters the module from above the module, the dispersed phase is gathered in the module and separated from the continuous phase, and the heavy phase fluid and the light phase fluid are separated and layered at the lower part of the module and are discharged respectively, so as to realize the separation of the light and heavy phase fluid mixture. Figure 8b

[0133] When the upward flow mode is adopted, as shown in Fig. 7, the two-phase mixture enters the module from below the module, the dispersed phase is gathered in the module and separated from the continuous phase, and the heavy phase fluid is discharged from below the module and the light phase fluid is discharged from above the module, so as to realize the separation of the light and heavy phase fluid mixture. Figure 8a

[0134] It should be noted that the module can also be manufactured according to the integrated screw ribbon inclined pipe settling module.

[0135]

[0136]

[0137] Embodiment six

[0138] As shown in Fig. 8, the present application provides a screw ribbon inclined pipe partitioned settling module, and in the embodiment: Figure 9 (1) the screw ribbon inclined pipe partitioned settling module is divided into an inner and an outer functional physical partition by a coaxial isolation cylinder 5, the outer partition is an annular partition surrounding the inner partition, and the lower parts of the two partitions are communicated and the upper parts are physically isolated by the coaxial isolation cylinder 5;

[0139] (2) the two functional partitions are a coarse partition and a purification zone, the annular outer partition is the coarse partition, and the inner partition is the purification zone, and the purification zone has a higher module height than the coarse partition;

[0140]

[0141] ​​​It should be noted that the two partitions can be used as coarse partition or purification zone, one of which is used as coarse partition, and the other is used as purification zone.

[0142] ⑥The coarse partition is used for separating the thick-phase two-phase fluid, and the downward flow operation mode is adopted, and the screw belt inclination angle is 45°; the purification zone is used for further separating the thin-phase two-phase fluid discharged from the coarse partition, and the upward flow operation mode is adopted, and the screw belt inclination angle is 60°; the screw belt cross section shape of the two partitions is semicircular;

[0143] It should be noted that the module can be manufactured in an integrated screw belt inclined pipe settling module, or can be assembled by nesting sub-modules of a combined screw belt inclined pipe settling module; the two partitions can adopt different screw belt cross section shapes, heights, widths, numbers, inclination angles and flow cross section ratios according to the separation task requirements;

[0144] The module further improves the adaptability to the two-phase fluid mixture through functional partitioning, and is suitable for separating two-phase mixtures with a large amount of dispersed phase (generally heavy phase). The two-phase mixture (thick-phase mixture) passes through the coarse partition from top to bottom, most of the dispersed phase is aggregated in the coarse partition and is separated from the continuous phase (generally light phase), and is discharged from the bottom of the coarse partition. The two-phase mixture (thin-phase mixture) containing a small amount of dispersed phase obtained from the bottom of the coarse partition passes through the purification zone from bottom to top, the dispersed phase is aggregated in the purification zone and is separated from 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] Example Seven

[0146] This embodiment is a screw belt type inclined pipe partition settling module, as shown in Figure 10 The difference between example seven and example six is that:

[0147] ⑴In this embodiment, the inner partition is the coarse partition, and the annular outer partition is the purification zone. The outer partition has a higher module height than the inner partition.

[0148] ⑵In this embodiment, the inner partition (coarse partition) has a screw belt inclination angle of 45°, and the outer partition (purification zone) has a screw belt inclination angle of 60°.

[0149] ⑶In this embodiment, there are two feedstocks of thick-phase mixture and thin-phase mixture to adapt to different application scenarios. The thick-phase mixture enters from the top of the inner partition (coarse partition), the thin-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] Example seven and example six are the same in other structures, and will not be described here.

[0151] Example Eight

[0152] This embodiment is a screw belt type inclined tube partitioned sedimentation module, as shown in Figure 11 The difference between embodiment eight and embodiments six and seven is that:

[0153] (1) In this embodiment eight, the special data of the module is more specific, and embodiments six and seven show more structural features and application scenarios of the module.

[0154] (2) The structural feature data of this embodiment eight is shown in Table 2 below.

[0155] The structural features of the module of this embodiment eight are consistent with those of embodiment six, and will not be described here.

[0156]

Claims

1. A spiral ribbon inclined tube sedimentation module for sedimentation separation of two-phase fluids, 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 equidistantly arranged circumferentially between adjacent coaxial cylinders. Independent spiral sedimentation channels are formed between adjacent coaxial cylinders and adjacent parallel spiral ribbons in the module. The spiral sedimentation channels form the spiral ribbon inclined tube, which serves as a space for flow and sedimentation separation of the two-phase fluid mixture medium to achieve a separation effect with the inclined plate or filler. At the same time, the spiral directional flow of the fluid forms a cyclonic sedimentation effect to enhance the separation effect of the two-phase fluid mixture. The width of the spiral ribbons 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. The spiral ribbons between adjacent coaxial cylinders are arranged equidistantly along the circumferential direction. 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 or close to the spiral ribbon width C. The corresponding horizontal spacing F of the spiral ribbons is approximately calculated as follows: F=C / sinβ, where β is the angle between the spiral ribbon and the horizontal plane.

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 composed of several coaxial cylinders and several spiral ribbons welded or bonded 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 several 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. Several spiral ribbons can be placed inside it to form a spiral ribbon inclined tube together with the central cylinder.

3. The spiral ribbon 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 several 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 several 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 several 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 several 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 several spiral ribbon inclined tubes.

4. The spiral ribbon 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 spiral ribbon inclined tube sedimentation module according to claim 2, characterized in that: The angle β between the spiral ribbon and the horizontal plane 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 non-adjacent coaxial cylinders can be the same or different.

6. The spiral ribbon inclined tube sedimentation module according to claim 1, characterized in that: The cross-sectional shape of the spiral ribbon is semicircular, semi-elliptical, semi-regular polygonal, straight line or broken line.

7. The spiral ribbon inclined tube sedimentation module according to claim 6, 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 flow resistance of the dispersed phase heavy phase fluid downward or the light phase fluid upward.

8. A spiral ribbon inclined tube partitioned sedimentation module for sedimentation separation of two-phase fluids, characterized in that: The spiral-belt inclined tube partitioned sedimentation module adopts the spiral-belt inclined tube sedimentation module described in any one of claims 1 to 7, 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. Both the inner and outer partitions can be used as coarse partitions or purification partitions, one partition is used as a coarse partition, and the other partition is used as a purification partition.

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