Membrane separation device and material flow rate adjusting method

Abstract

The embodiment of the application discloses a membrane separation device and a material flow speed adjusting method thereof. The membrane separation device comprises a shell, a first partition plate, a plurality of membrane tubes and a plurality of heating pipes. The first partition plate is arranged in the shell to divide the inner cavity of the shell into a containing cavity and a vacuum cavity. The plurality of membrane tubes are arranged at intervals in the containing cavity. The plurality of heating pipes are correspondingly sleeved outside the membrane tubes. The outer wall of the membrane tube and the inner wall of the heating pipe form a material cavity for the flow of material. The first partition plate is provided with a plurality of perforations and a plurality of adapter channels communicating with the plurality of perforations. The ends of the plurality of membrane tubes are respectively arranged in the plurality of perforations of the first partition plate and extend into the vacuum cavity. The ends of the plurality of heating pipes are correspondingly arranged in the plurality of perforations of the first partition plate. By changing the series and parallel connection relationship between the plurality of adapter channels, the flow area of the material in the membrane separation device can be adjusted, and the membrane separation performance of the membrane separation device on the material can be adjusted.

Description

Technical Field

[0001] This invention relates to the field of membrane separation technology, and in particular to a membrane separation device and a method for regulating material flow rate. Background Technology

[0002] Membrane separation generally refers to the process of separating fluid mixtures by utilizing the selective permeation of membranes to different components. Membrane separation technology is widely used in petrochemical, biopharmaceutical, food processing, and environmental engineering fields.

[0003] Most existing membrane separation devices have fixed structures, and their membrane separation performance for materials is not adjustable, resulting in poor adaptability to different material throughputs. Summary of the Invention

[0004] The purpose of this invention is to provide a membrane separation device and a material flow rate adjustment method, which aims to solve the problem of the unadjustable membrane separation performance of existing membrane separation devices.

[0005] In a first aspect, the present invention provides a membrane separation device, the membrane separation device comprising:

[0006] case;

[0007] A first partition plate is disposed inside the housing to divide the inner cavity of the housing into a receiving cavity and a vacuum cavity;

[0008] A plurality of membrane tubes are arranged at intervals within the accommodating cavity and are used to separate materials;

[0009] The device includes several heating tubes, which are disposed within the accommodating cavity and correspondingly sleeved on the outside of the membrane tube. The outer wall of the membrane tube and the inner wall of the heating tube enclose each other to form a material cavity for material flow.

[0010] The first partition plate is provided with a plurality of perforations and a plurality of transition channels connecting the plurality of perforations. The ends of the plurality of membrane tubes are respectively inserted through the plurality of perforations of the first partition plate and extend into the vacuum chamber. The ends of the plurality of heating tubes are placed one by one in the plurality of perforations of the first partition plate, so that the plurality of material chambers are connected to the plurality of transition channels.

[0011] By changing the series or parallel connection relationship between several of the aforementioned transfer channels, the flow cross-sectional area of ​​the material within the membrane separation device can be adjusted.

[0012] Secondly, the present invention also provides a method for adjusting the material flow rate of a membrane separation device, the method being applied to the membrane separation device, the membrane separation device comprising:

[0013] case;

[0014] A first partition plate is disposed inside the housing to divide the inner cavity of the housing into a receiving cavity and a vacuum cavity;

[0015] A plurality of membrane tubes are arranged at intervals within the accommodating cavity and are used to separate materials;

[0016] The device includes several heating tubes, which are disposed within the accommodating cavity and correspondingly sleeved on the outside of the membrane tube. The outer wall of the membrane tube and the inner wall of the heating tube enclose each other to form a material cavity for material flow.

[0017] The first partition plate is provided with a plurality of perforations and a plurality of transition channels connecting the plurality of perforations. The ends of the plurality of membrane tubes are respectively inserted through the plurality of perforations of the first partition plate and extend into the vacuum chamber. The ends of the plurality of heating tubes are placed one by one in the plurality of perforations of the first partition plate, so that the plurality of material chambers are connected to the plurality of transition channels.

[0018] The material flow rate adjustment method includes the following steps:

[0019] By changing the series or parallel connection relationship between several of the transfer channels, the flow cross-sectional area of ​​the material in the membrane separation device can be adjusted.

[0020] The embodiments of the present invention have the following beneficial effects:

[0021] In the membrane separation device of the present invention, a plurality of heating tubes are disposed in the accommodating cavity and correspondingly sleeved on the outside of the membrane tubes. The outer wall of the membrane tubes and the inner wall of the heating tubes enclose a material cavity for material flow. A plurality of perforations and a plurality of transition channels connecting the plurality of perforations are provided on the first partition plate. The ends of the plurality of membrane tubes are respectively inserted through the plurality of perforations of the first partition plate and extend into the vacuum cavity. The ends of the plurality of heating tubes are respectively placed in the plurality of perforations of the first partition plate, so that the plurality of material cavities are connected to the plurality of transition channels. By changing the series and parallel connection relationship between the plurality of transition channels, the flow cross-sectional area of ​​the material in the membrane separation device can be adjusted, thereby changing the flow rate of the material and thus adjusting the membrane separation performance of the membrane separation device for the material.

[0022] In addition, by using the flow channel inside the first partition plate to transport materials, there is no need to set up a separate raw material chamber inside the shell to transport materials into the material chamber. This can extend the effective length of the membrane tube and improve the membrane separation performance of the membrane separation device.

[0023] The material flow rate adjustment method of the membrane separation device of the present invention changes the series and parallel connection relationship between several transfer channels, adjusts the flow cross-sectional area of ​​the material in the membrane separation device, thereby changing the flow rate of the material and thus adjusting the membrane separation performance of the membrane separation device for the material. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] in:

[0026] Figure 1 This is a schematic diagram of a membrane separation device in one embodiment.

[0027] Figure 2 for Figure 1 Schematic diagram of the through holes on the first partition plate in the membrane separation device shown. Figure 1 .

[0028] Figure 3 for Figure 1 Schematic diagram of the through holes on the first partition plate in the membrane separation device shown. Figure 1 .

[0029] Figure 4 This is a schematic diagram of a membrane separation device in one embodiment.

[0030] Figure 5 for Figure 4 A cross-sectional view of the membrane separation device shown.

[0031] Figure 6 This is a schematic diagram of a membrane separation device in one embodiment.

[0032] Figure 7 for Figure 6 A cross-sectional view of the membrane separation device shown.

[0033] Figure 8 This is a schematic diagram of a membrane separation device in one embodiment.

[0034] Figure 9 for Figure 8 A cross-sectional view of the membrane separation device shown.

[0035] Figure 10 This is a schematic diagram of a membrane separation device in one embodiment.

[0036] Figure 11 for Figure 10A schematic diagram of the through holes on the first separator plate in the membrane separation device shown.

[0037] Figure 12 This is a schematic diagram of a membrane separation device in one embodiment.

[0038] Figure 13 This is a schematic diagram of a membrane separation device in one embodiment.

[0039] Figure 14 This is a schematic diagram of a membrane separation device in one embodiment.

[0040] Figure 15 This is a front view of a membrane separation apparatus according to one embodiment.

[0041] Figure 16 for Figure 15 Top view of the membrane separation device shown.

[0042] Figure 17 for Figure 15 A cross-sectional view of the membrane separation device shown.

[0043] Figure 18 This is a schematic diagram of the partition chamber on the membrane separation device in one embodiment.

[0044] Figure 19 This is a schematic diagram of the channel of the first partition plate on the membrane separation device in one embodiment.

[0045] Figure 20 This is a schematic diagram illustrating the effect of material flow rate on membrane dewatering efficiency.

[0046] Figure 21 This is a schematic diagram illustrating the effect of material temperature on membrane dewatering efficiency.

[0047] Figure 22 This is a schematic diagram of a traditional sleeve-type membrane module structure.

[0048] Figure 23 This is a schematic diagram of a traditional baffle-type membrane module structure.

[0049] Reference numerals: 310, Housing; 311, First Housing; 312, Second Housing; 314, Separation Chamber; 320, First Separator Plate; 321, Adapter Channel; 322, First Side Plate; 323, Second Side Plate; 324, Sealing Plate; 325, First Interface; 326, Second Interface; 330, Membrane Tube; 340, Heating Tube; 350, Adapter Plate; 351, First Transformer Plate; 352, Second Transformer Plate; 353, Sealing Plate; 360, Adapter Pipe; 370, Second Separator Plate;

[0050] 401. Heating inlet; 402. Heating outlet; 403. Vacuum port; 404. Material inlet; 405. Material outlet;

[0051] 410. Containing cavity; 420. Vacuum cavity; 430. Material cavity; 440. Heating cavity. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0055] This invention discloses a membrane separation device; please refer to [link / reference]. Figures 1 to 19 The membrane separation device includes a housing 310, a first partition plate 320, a plurality of membrane tubes 330, and a plurality of heating tubes 340. The first partition plate 320 is disposed inside the housing 310 to divide the inner cavity of the housing 310 into a receiving cavity 410 and a vacuum cavity 420. The plurality of membrane tubes 330 are disposed at intervals in the receiving cavity 410 and are used to separate materials. The plurality of heating tubes 340 are disposed in the receiving cavity 410 and are correspondingly sleeved on the outside of the membrane tubes 330. The outer wall of the membrane tubes 330 and the inner wall of the heating tubes 340 enclose each other to form a material cavity 430 for material flow.

[0056] The first partition plate 320 is provided with several perforations and several transition channels 321 connecting the several perforations. The ends of several membrane tubes 330 are respectively inserted through the several perforations of the first partition plate 320 and extend into the vacuum chamber 420. The ends of several heating tubes 340 are placed in the several perforations of the first partition plate 320, so that several material chambers 430 are connected to several transition channels 321. By changing the series and parallel connection relationship between the several transition channels 321, the flow cross-sectional area of ​​the material in the membrane separation device can be adjusted, thereby changing the flow rate of the material and thus adjusting the membrane separation performance of the membrane separation device for the material.

[0057] In addition, by using the flow channel inside the first partition plate 320 to transport materials, it is not necessary to set up a separate raw material chamber inside the housing 310 to transport materials into the material chamber 430. This can extend the effective length of the membrane tube 330 and improve the membrane separation performance of the membrane separation device.

[0058] It is understandable that when the number of membrane tubes 330 is the same as the number of heating tubes 340, several heating tubes 340 are fitted one-to-one around the outside of the membrane tubes 330. When the membrane separation device is also equipped with a steel pipe for replacing the membrane tubes 330, then a portion of the heating tubes 340 are fitted around the outside of the membrane tubes 330, and another portion is fitted around the outside of the steel pipe, thereby adjusting the membrane area of ​​the membrane separation device.

[0059] In one embodiment, please refer to Figures 1 to 18 The housing 310 includes a first housing 311 and a second housing 312. The two sides of the first partition plate 320 are detachably connected to the first housing 311 and the second housing 312 respectively. The first partition plate 320, a plurality of membrane tubes 330 and a plurality of heating tubes 340 constitute an integrated membrane core. The membrane core is detachably installed in the housing 310. There are a plurality of membrane cores. The series and parallel connections between the plurality of transfer channels 321 on the first partition plate 320 in the plurality of membrane cores are different or the same. One or more of the plurality of membrane cores are detachably installed in the housing 310.

[0060] By replacing the membrane core, the series and parallel connection relationships between several transfer channels 321 on the first separator 320 can be changed, thereby changing the flow rate of the material and adjusting the membrane separation performance of the membrane separation device.

[0061] In one embodiment, please refer to Figures 1 to 18 A plurality of transition channels 321 of one or more first partition plates 320 in a plurality of membrane cores are connected in series. A first interface 325 and a second interface 326 are provided on the first partition plate 320. The first interface 325 and the second interface 326 are respectively connected to the plurality of transition channels 321.

[0062] A portion of a plurality of transfer channels 321 of one or more first separator plates 320 in a plurality of membrane cores are connected in series to form a first flow group, and another portion of a plurality of transfer channels 321 are connected in series to form a second flow group. The first flow group and the second flow group are arranged in parallel. The first separator plate 320 is provided with two first interfaces 325 and two second interfaces 326. One of the two first interfaces 325 is connected to the first flow group and the other is connected to the second flow group. One of the two second interfaces 326 is connected to the first flow group and the other is connected to the second flow group.

[0063] By replacing the membrane core, the series and parallel connection relationships between several transfer channels 321 on the first separator 320 can be changed, thereby changing the flow rate of the material and adjusting the membrane separation performance of the membrane separation device.

[0064] In one embodiment, please refer to Figure 6 and Figure 7 The device has one membrane core. The first shell 311 has a heating inlet 401 and a heating outlet 402 located away from the heating inlet 401. The second shell 312 has a vacuum port 403 connected to the vacuum chamber 420. The first partition plate 320 has a first interface 325 and a second interface 326, which are respectively connected to several transfer channels 321, thereby facilitating the integration, disassembly and assembly of the membrane core. A single membrane core device is adopted.

[0065] Of course, in other embodiments, please refer to Figure 8 and Figure 9 Two membrane cores can be provided and inserted into both sides of the first shell 311 respectively. Two second shells 312 are provided and detachably connected to both sides of the first shell 311 respectively. Each second shell 312 is provided with a vacuum port 403 that communicates with the corresponding vacuum chamber 420. The first partition plate 320 is provided with a first interface 325 and a second interface 326. The first interface 325 and the second interface 326 are respectively connected to several transfer channels 321, and a dual membrane core device is adopted.

[0066] In one embodiment, the housing 310 includes a first housing 311 and a second housing 312 detachably connected to the first housing 311; the first partition plate 320 has several transfer channels 321 divided into several material flow groups, and the several transfer channels 321 in each material flow group are connected in series; the first partition plate 320 is provided with several first interfaces 325 and several second interfaces 326, and each first interface 325 and each second interface 326 is connected to each material flow group respectively; wherein, the membrane separation device also includes several first regulating tubes, one or more of the several first regulating tubes being detachably connected to several first interfaces 325 and several second interfaces 326 to change the series or parallel relationship between the material flow groups.

[0067] By using the connection control of several first regulating pipes, the series and parallel connection relationship between several transfer channels 321 on the first partition plate 320 can be changed, thereby changing the flow rate of the material and adjusting the membrane separation performance of the membrane separation device on the material.

[0068] In one embodiment, the first partition plate 320 has several transfer channels 321 divided into four material flow groups, each material flow group including a first group, a second group, a third group, and a fourth group; the first partition plate 320 is provided with four first interfaces 325 and four second interfaces 326, each first interface 325 including one port connected to the first group, one and two ports connected to the second group, one and three ports connected to the third group, and one and four ports connected to the fourth group, each second interface 326 including two ports connected to the first group, two and two ports connected to the second group, two and three ports connected to the third group, and two and four ports connected to the fourth group; the second shell 312 is provided with a material inlet 404 and a material outlet 405.

[0069] Among them, the first detachable connection of the first regulating pipe is material inlet 404 and port 1, the second detachable connection of the first regulating pipe is material outlet 405 and port 24, the third detachable connection of the first regulating pipe is port 21 and port 12, the fourth detachable connection of the first regulating pipe is port 22 and port 13, and the fifth detachable connection of the first regulating pipe is port 23 and port 14.

[0070] Alternatively, the first detachable material inlet 404 and port 1 in a plurality of first regulating pipes, the second detachable material inlet 404 and port 12 in a plurality of first regulating pipes, the third detachable material inlet 404 and port 13 in a plurality of first regulating pipes, and the fourth detachable material inlet 404 and port 14 in a plurality of first regulating pipes.

[0071] The fifth detachable material outlet 405 and the second outlet 2 in a plurality of first regulating pipes, the sixth detachable material outlet 405 and the second outlet 2 in a plurality of first regulating pipes, the seventh detachable material outlet 405 and the second outlet 3 in a plurality of first regulating pipes, and the eighth detachable material outlet 405 and the second outlet 4 in a plurality of first regulating pipes.

[0072] By using the connection control of several first regulating pipes, the series and parallel connection relationship between several transfer channels 321 on the first partition plate 320 can be changed, thereby changing the flow rate of the material and adjusting the membrane separation performance of the membrane separation device on the material.

[0073] In one embodiment, please refer to the following: Figures 15 to 18 As shown, the membrane separation device also includes a membrane shell, a first partition plate 320, a plurality of membrane tubes 330 and a plurality of heating tubes 340 integrated on the membrane shell to form a membrane core, the membrane core being detachably installed on the housing 310; the first partition plate 320 is provided with a first interface 325 and a second interface 326, the first interface 325 and the second interface 326 being respectively connected to a plurality of transfer channels 321; the housing 310 includes a first shell 311 and a second shell 312 detachably connected to the first shell 311, the first shell 311 is provided with a plurality of partition cavities 314, a plurality of membrane cores are provided, the plurality of membrane cores are respectively provided in the plurality of partition cavities 314, the second shell 312 is provided with a plurality of membrane cores, and is detachably installed on the first shell 311, and is enclosed with the plurality of first partition plates 320 to form a plurality of vacuum cavities 420; the plurality of second shells 312 are respectively provided with a material inlet 404 connected to the corresponding first interface 325 and a material outlet 405 connected to the corresponding second interface 326. This allows for flexible arrangement of several membrane cores within the housing 310.

[0074] The membrane separation device also includes several second regulating pipes, one or more of which are detachably connected to several material inlets 404 and several material outlets 405 to change the series or parallel relationship between the membrane cores.

[0075] By using the connection and control of several second regulating tubes, the series and parallel relationships between each membrane core can be changed, thereby changing the flow rate of the material and thus adjusting the membrane separation performance of the membrane separation device.

[0076] In addition to changing the series-parallel relationship of material flow through the second regulating pipe and connecting it with the material flow group in the membrane core, different materials can be input into different membrane cores to meet the need for the same equipment to process multiple materials at the same time.

[0077] In one embodiment, please refer to Figures 1 to 9The membrane separation device also includes a converter plate 350, which has several fixing holes. One end of several heating tubes 340 is placed in several through holes of the first partition plate 320, and the other end is placed in several fixing holes of the converter plate 350. The converter plate 350 also has several connecting channels that connect the fixing holes, thereby supporting the membrane tube 330 and the heating tube 340 on the other side.

[0078] Of course, in other embodiments, please refer to Figures 10 to 14 The membrane separation device also includes a transfer tube 360, which is U-shaped and has two ends connected to two corresponding heating tubes 340, thereby supporting the membrane tube 330 and the heating tube 340 on the other side and transferring materials through the transfer tube 360.

[0079] In one embodiment, please refer to Figures 1 to 9 The first partition plate 320 includes a first side plate 322 and a second side plate 323 attached to the first side plate 322. The first side plate 322 is provided with a plurality of first holes, and the second side plate 323 is provided with a plurality of second holes corresponding to the plurality of first holes. The first holes and the second holes constitute the perforations of the first partition plate 320. The end of the membrane tube 330 passes through the first holes and the second holes and extends into the vacuum chamber 420. The end of the heating tube 340 is inserted into the first hole. The second side plate 323 is provided with a plurality of transition grooves on the side close to the first side plate 322. The plurality of transition grooves and the first side plate 322 surround each other to form a plurality of transition channels 321. By separating the two, the processing and setting of the first partition plate 320 is facilitated and the cost is low.

[0080] Specifically, both the first side plate 322 and the second side plate 323 are porous metal plates. The membrane tube 330 and the first partition plate 320 can be connected and fixed by one or more methods such as expansion joint, welding, and expansion welding. A sealing plate 324 is also provided between the first side plate 322 and the second side plate 323.

[0081] In one embodiment, please refer to Figures 1 to 9 The adapter plate 350 includes a first adapter plate 351 and a second adapter plate 352 attached to the first adapter plate 351. The first adapter plate 351 is provided with a plurality of first rotating holes, and the second adapter plate 352 is provided with a plurality of second rotating holes corresponding to the plurality of first rotating holes. The first rotating holes and the second rotating holes constitute the fixing holes of the adapter plate 350. The end of the membrane tube 330 passes through the first rotating holes and the second rotating holes, and the end of the heating tube 340 is inserted into the first hole. The second adapter plate 352 is provided with a plurality of connecting grooves on the side near the first adapter plate 351. The plurality of connecting grooves and the first adapter plate 351 enclose a plurality of connecting channels.

[0082] The separate design facilitates the processing and setup of the adapter board 350, resulting in lower costs.

[0083] In one embodiment, one end of several membrane tubes 330 extends into the vacuum chamber 420, and the other end is respectively provided with a plug, thereby facilitating the formation of a vacuum inside the membrane tubes 330. The low pressure and vacuum state can drive the membrane layer of the membrane tubes 330 to separate materials.

[0084] Of course, in other embodiments, the adapter plate 350 also includes a sealing plate 353, which replaces the sealing. The sealing plate 353 is attached to the side of the second adapter plate 352 away from the first adapter plate 351. The sealing plate 353 has several sealing grooves on the side of the second adapter plate 352. One end of several membrane tubes 330 extends into the vacuum chamber 420, and the other end is respectively sealed in several sealing grooves.

[0085] In this embodiment, the cavity wall of the accommodating cavity 410 and the outer wall of the heating tube 340 enclose each other to form a heating cavity 440. The housing 310 is provided with a heating inlet 401 that communicates with the heating cavity 440 and a heating outlet 402 that is disposed away from the heating inlet 401.

[0086] The membrane separation device also includes a second partition plate 370. Each of the second partition plates 370 is provided with a number of perforations. A number of membrane tubes 330 and a number of heating tubes 340 are respectively inserted through the perforations of the second partition plates 370. The second partition plates 370 are arranged at intervals and staggered in the accommodating cavity 410 to divide the heating cavity 440 into a serpentine flow channel, which facilitates stable and uniform heating of the material.

[0087] In one embodiment, the second shell 312 is provided with a material inlet 404 and a material outlet 405 to facilitate the detachable installation of the membrane core. Taking a heating tube 340 with a specification of ф20×2mm and a membrane tube 330 with a diameter of 12mm as an example, the cross-sectional area of ​​the internal material flow corresponding to a single membrane tube 330 is 88mm². 2 The heating tubes 340 can be connected in parallel, either individually or in multiples, through the upper flow channel of the first partition plate 320, meaning the material flow cross-sectional area can be 88 mm². 2 The length difference between the heating tube 340 and the membrane tube 330 is only more than twice the wall thickness of the first partition plate 320. The material feeding chamber and the flow chamber between the stages are very small, which maximizes the effective utilization length of the membrane tube 330.

[0088] In one embodiment, please refer to 15 to Figure 18The membrane core and the membrane separation device are both rectangular in shape. Compared to the traditional cylindrical structure, the rectangular design ensures that the material flows through uniformly sized channels, maintaining a stable and controllable flow state and fully utilizing the dewatering efficiency of the membrane tube 330. In this embodiment, the internal chambers of the first shell 311 can be infinitely expanded by increasing the number and arrangement of the partition cavities 314, thereby increasing the number of membrane cores installed in a single membrane separation device, improving the membrane module's packing density, and reducing the device's membrane space density.

[0089] In the membrane separation device of the present invention, the material flows longitudinally in the gap between the heating tube 340 and the membrane tube 330. After reaching the first partition plate 320, the flow direction is changed in the flow channel of the first partition plate 320 and it is passed to the next set of membrane tubes 330. During the back-mixing process, the material is more fully back-mixed, eliminating concentration and temperature differences. At the same time, the heat medium outside the heating tube 340 provides uniform heating to the material through the heat conduction of the heating tube 340, so that the material in the membrane separation device is in a temperature controllable state throughout the dehydration process. The temperature of the heat medium can be adjusted according to different dehydration depth requirements to ensure that the material is in a constant temperature state in the membrane module.

[0090] To assess the heat compensation capacity of membrane module equipment based on the required heat compensation, the evaluation parameter "heat compensation density" is introduced. "Heat compensation density" is calculated as heat compensation area / membrane area (unit: m²). 2 / m 2 The compensating density value is ≥1.4m³. 2 / m 2 Taking a heating tube 340 with a specification of ф20×2mm, a membrane tube 330 with a diameter of 12mm and a length of 1000mm, and a first partition plate 320 with a thickness of 30mm as an example, if the number of membrane tubes 330 and metal tubes is both n, then the heat replenishment density is π×20×(1000-2×30)×n / (π×12×1000×n)=1.57m 2 / m 2 .

[0091] This invention also discloses a method for adjusting the material flow rate of a membrane separation device. Please refer to [link to relevant documentation]. Figures 1 to 19 The material flow rate regulation method is applied to a membrane separation device. The membrane separation device includes a housing 310, a first partition plate 320, a plurality of membrane tubes 330, and a plurality of heating tubes 340. The first partition plate 320 is disposed inside the housing 310 to divide the inner cavity of the housing 310 into a receiving cavity 410 and a vacuum cavity 420. The plurality of membrane tubes 330 are disposed at intervals in the receiving cavity 410 and are used to separate materials. The plurality of heating tubes 340 are disposed in the receiving cavity 410 and are correspondingly sleeved on the outside of the membrane tubes 330. The outer wall of the membrane tubes 330 and the inner wall of the heating tubes 340 enclose each other to form a material cavity 430 for material flow.

[0092] The first partition plate 320 is provided with several perforations and several transition channels 321 connecting the several perforations. The ends of several membrane tubes 330 are respectively inserted through the several perforations of the first partition plate 320 and extend into the vacuum chamber 420. The ends of several heating tubes 340 are placed in the several perforations of the first partition plate 320 one by one, so that several material chambers 430 are connected to several transition channels 321.

[0093] The material flow rate adjustment method includes the following steps:

[0094] By changing the series or parallel connection relationship between several transfer channels 321, the flow cross-sectional area of ​​the material in the membrane separation device can be adjusted, thereby changing the flow rate of the material and thus adjusting the membrane separation performance of the membrane separation device.

[0095] In one embodiment, the membrane separation device further includes a membrane shell, a first partition plate 320, a plurality of membrane tubes 330 and a plurality of heating tubes 340 are integrated on the membrane shell to form a membrane core, and the membrane core is detachably installed on the housing 310; the first partition plate 320 is provided with a first interface 325 and a second interface 326, and the first interface 325 and the second interface 326 are respectively connected to a plurality of transfer channels 321.

[0096] The housing 310 includes a first housing 311 and a second housing 312 detachably connected to the first housing 311. The first housing 311 has a plurality of partitioned cavities 314, and a plurality of membrane cores are disposed within each of the partitioned cavities 314. A plurality of second housings 312 are disposed and detachably mounted on the first housing 311, and together with a plurality of first partition plates 320, form a plurality of vacuum cavities 420. Each of the second housings 312 has a material inlet 404 communicating with a corresponding first interface 325, and a material outlet 405 communicating with a corresponding second interface 326.

[0097] The material flow rate regulation method also includes the following steps:

[0098] By changing the series or parallel connection relationship between several material inlets 404 and several material outlets 405, the flow cross-sectional area of ​​the material in the membrane separation device can be adjusted, thereby changing the flow rate of the material and thus adjusting the membrane separation performance of the membrane separation device.

[0099] In summary, by employing the membrane separation device and its material flow rate adjustment method of the present invention, the diameter of the membrane separation device is not limited, meaning that a single membrane separation device can be scaled up to the maximum size achievable with existing component specifications, thereby reducing the manufacturing cost of the shell structure per unit membrane area. Within the same membrane separation device, the material inlet and outlet can be flexibly set to ≥2, for example, see [reference needed]. Figure 2This refers to two inlets (two first interfaces 325) and two outlets (two second interfaces 326) within the same membrane separation device. Heating tubes 340 between one set of inlets and outlets are connected in series through the flow channels of the first partition plate 320, and the two sets of inlets and outlets are then connected in parallel. Please refer to [link / reference]. Figure 3 Another method involves setting only one set of inlet and outlet, namely one first interface 325 and one second interface 326; two heating tubes 340 are connected in parallel in one direction through the flow channel of the first partition plate 320. By setting the material inlet and outlet and the flow channel of the first partition plate 320, the series and parallel connection of the membrane tubes 330 in the membrane separation device can be flexibly realized; therefore, for projects with different processing capacities, the flow rate of the material on the membrane surface can be flexibly adjusted to achieve the ideal membrane dewatering efficiency.

[0100] Meanwhile, through uniform heating and controllable material flow rate design, to demonstrate the scale-up effect of membrane dehydration on an industrial scale, "industrial dehydration efficiency" can be achieved. This is defined as the ratio of water removal per square meter of membrane area in an industrial membrane module to water removal per square meter of membrane area in an experimental membrane module (unit: %), under the same process conditions. The industrial dehydration efficiency can reach 100%. Taking the membrane tube in this embodiment as an example, under the laboratory process conditions of 95% ethanol solution, temperature 100℃, pressure 0.35 MPa(G), the membrane permeation flux for membrane permeation vaporization dehydration is 2.5 kg / m³. 2 In an industrial plant with a mass flow rate of 1000 kg / h of ethanol (95% by mass), a temperature of 100°C, and a pressure of 0.35 MPa (G), existing membrane separation devices suffer from deficiencies in heat replenishment uniformity and flow rate control, as well as a reduction in the effective utilization length of the membrane tube (330mm). Consequently, the membrane permeation flux for membrane permeation vaporization dehydration is less than 1.25 kg / m³. 2 h, that is, the industrial dewatering efficiency is less than 50%. By using the membrane separation device and material flow rate adjustment method of this embodiment, under the same equipment investment, the industrial dewatering efficiency can be 100% because it overcomes the above problems.

[0101] Understandably, please refer to Figure 20 and Figure 21 Taking ethanol pervaporation as an example, under the same membrane tube performance conditions, the two factors affecting the dehydration efficiency of the membrane separation device are the material flow rate and the material temperature. Therefore, by controlling the material flow rate and the material temperature, the membrane separation efficiency and dehydration efficiency of the membrane separation device can be adjusted. The material flow rate can be adjusted by adjusting the material flow cross-sectional area, and the material temperature can be adjusted by adjusting the heating efficiency and heat compensation density of the heating tube.

[0102] Comparative Example 1: Please refer to Figure 22The traditional sleeve-type membrane module structure uses membrane tubes with an outer diameter of ф12mm and a length of 1030mm. Taking a DN900 diameter as an example: the shell diameter is 900mm, and the inner radius of the shell is 450mm. To meet the installation space requirements for the membrane tubes with an outer diameter of ф12mm, the sleeves are selected with an outer diameter of ф20mm × 2mm (i.e., an inner diameter of ф16mm), and the minimum spacing between the sleeves is 26mm. Considering structural design and manufacturing feasibility, the raw material chamber occupies a relatively large space due to the need to accommodate material inlet / outlet and shell welding space. The raw material chamber is divided into 8 stages by partition plates. Considering the welding operation space between the partition plates and the shell and the first inner tube plate, it is not suitable to add more partition plates. At the same time, adding more partition plates will affect the number of membrane tubes that can be arranged. Each stage has 100 membrane tubes (330). As shown in the figure, this equipment can arrange a maximum of 800 heating tubes, with 800 matching membrane tubes (330), of which the heat exchange tube length is 590mm.

[0103] The heat replenishment area is: 800 × π × 20 × 590 = 29.7 m² 2 .

[0104] The membrane area is: 800 × π × 12 × 10³⁰ = 31.06 m² 2 .

[0105] Therefore, the compensating density is: 29.7 / 31.06 = 0.96 m³. 2 / m 2 .

[0106] The membrane packing density is: 31.06 / (π×450) 2 ×1030×10 -9 ) = 47.4m 2 / m 3 .

[0107] Material flow cross-sectional area: 100×∏×(16 2 -12 2 ) / 4 = 8796mm 2 .

[0108] Structural analysis shows that the heat replenishment area of ​​the traditional sleeve-type membrane module structure is not adjustable, the material flow cross-sectional area is not adjustable, and it is not feasible to make it smaller.

[0109] Comparative Example 2: Please refer to Figure 23The traditional baffle-type membrane module structure uses membrane tubes with an outer diameter of ф12mm and a length of 1030mm. Taking a DN900 diameter as an example: the shell diameter is 900mm, and the inner radius of the shell is 450mm. Considering the sealing and installation space of the membrane tubes, the minimum spacing between the membrane tubes is 19mm, so the number of membrane tubes that can be arranged is approximately 1750. The length of the heat replenishment jacket is limited by the material inlet / outlet and equipment flange fastener installation requirements; the jacket length is 622mm, and the maximum jacket length can be 920mm.

[0110] The heat exchange area is: 622 × π × 900 = 1.5m² 2 Or 920 × π × 900 = 2.6m 2 .

[0111] The membrane area is: 1750 × π × 12 × 10³⁰ = 67.95 m² 2 .

[0112] Therefore, the compensating density is: 1.5 / 67.95 = 0.02m³. 2 / m 2 Or 2.6 / 67.95 = 0.04m 2 / m 2 .

[0113] The membrane packing density is: 67.95 / (π×450) 2 ×1030×10 -9 ) = 103.7m 2 / m 3 .

[0114] Structural analysis shows that the heating area of ​​the jacketed baffle membrane module is not adjustable. The material flow cross-sectional area can be adjusted by adjusting the spacing between the baffles, but since the material needs to flow through the entire cross-section of the equipment, it is not feasible to make it too small.

[0115] Ethanol solutions of different concentrations and flow rates undergo pervaporation under the same vacuum conditions:

[0116] Scenario 1: Ethanol solution, mass flow rate 1000 kg / h, dehydration temperature 120°C, water content 15%-0.1%, required membrane area 60 m². 2 The amount of water removed was 149.2 kg, and an additional 337912 kJ of heat was required.

[0117] Scenario 2: Ethanol solution, mass flow rate 1000 kg / h, dehydration temperature 120°C, water content 5%-0.02%, required membrane area 60 m². 2 The amount of water removed was 49.8 kg, and an additional 112,849 kJ of heat was required.

[0118] Scenario 3: Ethanol solution, mass flow rate 1000 kg / h, dehydration temperature 120°C, water content 1.1%-0.1% by mass, required membrane area 32 m². 2 The amount of water removed is 10 kg, and an additional 22678 kJ of heat is required.

[0119] Scenario 4: Ethanol solution, mass flow rate 100 kg / h, dehydration temperature 120°C, water content 10%-30 ppm, required membrane area 35 m² 2 The amount of water removed is 10 kg, and an additional 22678 kJ of heat is required.

[0120] Note: The membrane area requirements for the above scenarios are calculated based on the membrane dehydration being in the high-efficiency zone. For scenarios one, two, and three, the material volumetric flow rate is 0.35 L / s, calculated as 0.4 m / s. The internal flow cross-sectional area of ​​the membrane module is 875 mm². 2 In scenario four, the material volumetric flow rate is 0.035 L / s. Based on a flow rate of 0.4 m / s, the internal flow cross-sectional area of ​​the membrane module is 87.5 mm². 2 The above four scenarios include: (1) same flow rate, different membrane area requirements and different heat replenishment requirements; (2) same flow rate and same membrane area requirements, different heat replenishment requirements; (3) different flow rate, same membrane area and same heat replenishment requirements; etc. The structural forms of Comparative Example 1 and Comparative Example 2 determine that they cannot meet these changing requirements, thus requiring a large increase in membrane usage to meet the dehydration target.

[0121] Please refer to this embodiment as well. Figure 19 The membrane tube has an outer diameter of ф12mm and a length of 1030mm. Taking DN900 as an example, the shell diameter is 900mm and the inner radius is 450mm. The sleeve uses an outer diameter of ф20×2mm (i.e., an inner diameter of ф16mm), and the minimum spacing between the sleeves is 26mm. Using a multi-inlet single-hole channel design, four dehydration zones are set up in each of the four quadrants. A1 and A2, B1 and B2, C1 and C2, and D1 and D2 form four inlet / outlet groups. All eight inlets / outlets are detachable. A total of 980 sleeves are arranged, and the straight section length of the heat-replenishing metal pipe is 920mm.

[0122] The heat replenishment area is: 980 × π × 20 × 920 = 56.65 m² 2 .

[0123] The membrane area is: 980 × π × 12 × 10³⁰ = 38.05 m² 2 .

[0124] Therefore, the compensating density is: 56.65 / 38.05 = 1.49 m³. 2 / m 2 .

[0125] The membrane packing density is: 38.05 / (π×450) 2 ×1030×10 -9 ) = 58.1m 2 / m 3 .

[0126] Material flow cross-sectional area: 1×∏×(16) 2 -12 2 ) / 4 = 88mm 2 (Single area)

[0127] Series-parallel connection configuration within a single membrane module: Method 1: After the material enters the membrane housing from the inlet manifold, it simultaneously enters from A1, B1, C1, and D1, and flows out from A2, B2, C2, and D2 to the outlet manifold before exiting the membrane housing. The cross-sectional area of ​​the material is then: 4 × 88 = 352 mm². 2 .

[0128] Method 2: Short pipes connect inlets A2 and B2, and C2 and D2. Material enters the membrane shell from the inlet manifold, then simultaneously enters from A1 and C1, and flows out from B1 and D1 to the outlet manifold before exiting the membrane shell. The cross-sectional area of ​​the material is: 2 × 88 = 196 mm². 2 .

[0129] Method 3: Short pipes connect the inlets A2 and B2, C2 and D2, and B1 and D1. After the material enters the membrane shell from the inlet manifold, it simultaneously enters from A1, flows out from C1, and exits the membrane shell through the outlet manifold. The cross-sectional area of ​​the material is then: 1 × 88 = 88 mm². 2 .

[0130] Method 4: When there are multiple membrane modules, the above three connection methods within a single membrane module can be achieved through series and parallel connections between multiple membrane modules.

[0131] The membrane module in this embodiment can control the material flow rate to match the application requirements of different scenarios, so as to achieve the dehydration target with fewer membranes.

[0132] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A membrane separation device, characterized in that, The membrane separation device includes: case; A first partition plate is disposed inside the housing to divide the inner cavity of the housing into a receiving cavity and a vacuum cavity; A plurality of membrane tubes are arranged at intervals within the accommodating cavity and are used to separate materials; The device includes several heating tubes, which are disposed within the accommodating cavity and correspondingly sleeved on the outside of the membrane tube. The outer wall of the membrane tube and the inner wall of the heating tube enclose a material cavity for material flow. The first partition plate is provided with a plurality of perforations and a plurality of transition channels connecting the plurality of perforations. The ends of the plurality of membrane tubes are respectively inserted through the plurality of perforations of the first partition plate and extend into the vacuum chamber. The ends of the plurality of heating tubes are placed one by one in the plurality of perforations of the first partition plate, so that the plurality of material chambers are connected to the plurality of transition channels. By changing the series or parallel connection relationship between several of the aforementioned transfer channels, the flow cross-sectional area of ​​the material within the membrane separation device can be adjusted.

2. The membrane separation device according to claim 1, characterized in that, The housing includes a first housing and a second housing. The two sides of the first partition plate are detachably connected to the first housing and the second housing, respectively. The first partition plate, a plurality of membrane tubes and a plurality of heating tubes constitute an integrated membrane core, which is detachably installed in the housing. The membrane core is provided in a plurality of ways. The series and parallel connections between the plurality of transfer channels on the first partition plate in the plurality of membrane cores are different or the same. One or more of the plurality of membrane cores are detachably installed in the housing.

3. The membrane separation device according to claim 2, characterized in that, The transfer channels of one or more of the first partition plates in the plurality of membrane cores are connected in series. Each first partition plate is provided with a first interface and a second interface, which are respectively connected to the plurality of transfer channels; and / or, A first flow group is formed by connecting a portion of the transfer channels of one or more of the first separators in a plurality of membrane cores in series, and a second flow group is formed by connecting another portion of the transfer channels in series. The first flow group and the second flow group are connected in parallel. The first separator is provided with two first interfaces and two second interfaces. One of the two first interfaces is connected to the first flow group and the other is connected to the second flow group. One of the two second interfaces is connected to the first flow group and the other is connected to the second flow group.

4. The membrane separation device according to claim 2, characterized in that, The membrane core is provided in one unit. The first shell is provided with a heating inlet and a heating outlet located away from the heating inlet. The second shell is provided with a vacuum port connected to the vacuum chamber. The first partition plate is provided with a first interface and a second interface, which are respectively connected to a plurality of the transfer channels. Alternatively, two membrane cores are provided and inserted into both sides of the first shell, and two second shells are provided accordingly and detachably connected to both sides of the first shell; each second shell is provided with a vacuum port that communicates with the corresponding vacuum chamber; the first partition plate is provided with a first interface and a second interface, and the first interface and the second interface are respectively connected to a plurality of the transfer channels.

5. The membrane separation device according to claim 1, characterized in that, The housing includes a first housing and a second housing detachably connected to the first housing; The first partition plate has several transfer channels divided into several material flow groups. The transfer channels in each material flow group are connected in series. The first partition plate is provided with several first interfaces and several second interfaces. Each first interface and each second interface are respectively connected to each material flow group. The membrane separation device further includes a plurality of first regulating tubes, one or more of which are detachably connected to a plurality of first interfaces and a plurality of second interfaces to change the series or parallel relationship between the material flow groups.

6. The membrane separation device according to claim 5, characterized in that, The first partition plate has several transfer channels divided into four material flow groups, each of which includes a first group, a second group, a third group, and a fourth group; the first partition plate is provided with four first interfaces and four second interfaces, each first interface including one port connected to the first group, one and two ports connected to the second group, one and three ports connected to the third group, and one and four ports connected to the fourth group, each second interface including two and one ports connected to the first group, two and two ports connected to the second group, two and three ports connected to the third group, and two and four ports connected to the fourth group; the second shell is provided with a material inlet and a material outlet; Among them, the first of the plurality of first regulating tubes is detachably connected to the material inlet and the first port, the second of the plurality of first regulating tubes is detachably connected to the material outlet and the second port, the third of the plurality of first regulating tubes is detachably connected to the second port and the first port, the fourth of the plurality of first regulating tubes is detachably connected to the second port and the first port, and the fifth of the plurality of first regulating tubes is detachably connected to the second port and the first port. Alternatively, the first of a plurality of first regulating tubes may be detachably connected to the material inlet and the first port; the second of a plurality of first regulating tubes may be detachably connected to the material inlet and the second port; the third of a plurality of first regulating tubes may be detachably connected to the material inlet and the third port; and the fourth of a plurality of first regulating tubes may be detachably connected to the material inlet and the fourth port. The fifth of the plurality of first regulating tubes is detachably connected to the material outlet and the second port; the sixth of the plurality of first regulating tubes is detachably connected to the material outlet and the second port; the seventh of the plurality of first regulating tubes is detachably connected to the material outlet and the second port; and the eighth of the plurality of first regulating tubes is detachably connected to the material outlet and the second port.

7. The membrane separation device according to claim 1, characterized in that, The membrane separation device further includes a membrane shell, and the first partition plate, a plurality of membrane tubes and a plurality of heating tubes are integrated on the membrane shell to form a membrane core, and the membrane core is detachably installed on the shell; the first partition plate is provided with a first interface and a second interface, and the first interface and the second interface are respectively connected to a plurality of the transfer channels; The housing includes a first housing and a second housing detachably connected to the first housing. The first housing is provided with a plurality of partition cavities. A plurality of membrane cores are provided, and the plurality of membrane cores are respectively disposed in the plurality of partition cavities. A plurality of second housings are provided and are respectively detachably installed on the first housing, and together with the plurality of first partition plates, they form a plurality of vacuum cavities. Each of the second shells is provided with a material inlet that communicates with the corresponding first interface and a material outlet that communicates with the corresponding second interface; The membrane separation device further includes several second regulating tubes, one or more of which are detachably connected to several material inlets and several material outlets to change the series or parallel relationship between the membrane cores.

8. The membrane separation apparatus according to any one of claims 1 to 7, characterized in that, The membrane separation device further includes an adapter plate, which has a plurality of fixing holes. One end of each of the heating tubes is placed in a plurality of through holes in the first partition plate, and the other end is placed in a plurality of fixing holes in the adapter plate. The adapter plate also has a plurality of connecting channels communicating with the plurality of fixing holes; and / or, The cavity wall of the accommodating cavity and the outer wall of the heating tube form a heating cavity. The housing is provided with a heating inlet that communicates with the heating cavity and a heating outlet that is disposed away from the heating inlet.

9. A method for adjusting the material flow rate of a membrane separation device, characterized in that, The material flow rate regulation method is applied to a membrane separation device, the membrane separation device comprising: case; A first partition plate is disposed inside the housing to divide the inner cavity of the housing into a receiving cavity and a vacuum cavity; A plurality of membrane tubes are arranged at intervals within the accommodating cavity and are used to separate materials; The device includes several heating tubes, which are disposed within the accommodating cavity and correspondingly sleeved on the outside of the membrane tube. The outer wall of the membrane tube and the inner wall of the heating tube enclose a material cavity for material flow. The first partition plate is provided with a plurality of perforations and a plurality of transition channels connecting the plurality of perforations. The ends of the plurality of membrane tubes are respectively inserted through the plurality of perforations of the first partition plate and extend into the vacuum chamber. The ends of the plurality of heating tubes are placed one by one in the plurality of perforations of the first partition plate, so that the plurality of material chambers are connected to the plurality of transition channels. The material flow rate adjustment method includes the following steps: By changing the series or parallel connection relationship between several of the transfer channels, the flow cross-sectional area of ​​the material in the membrane separation device can be adjusted.

10. The method for adjusting the material flow rate of the membrane separation device according to claim 9, characterized in that, The membrane separation device further includes a membrane shell, and the first partition plate, a plurality of membrane tubes and a plurality of heating tubes are integrated on the membrane shell to form a membrane core, and the membrane core is detachably installed on the shell; the first partition plate is provided with a first interface and a second interface, and the first interface and the second interface are respectively connected to a plurality of the transfer channels; The housing includes a first housing and a second housing detachably connected to the first housing. The first housing is provided with a plurality of partition cavities. A plurality of membrane cores are provided, and the plurality of membrane cores are respectively disposed in the plurality of partition cavities. A plurality of second housings are provided and are respectively detachably installed on the first housing, and together with the plurality of first partition plates, they form a plurality of vacuum cavities. Each of the second shells is provided with a material inlet that communicates with the corresponding first interface and a material outlet that communicates with the corresponding second interface; The material flow rate adjustment method further includes the following steps: By changing the series or parallel connection relationship between several material inlets and several material outlets, the flow cross-sectional area of ​​the material within the membrane separation device can be adjusted.

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