Membrane separation device

Abstract

The embodiment of the utility model discloses a membrane separation device, the membrane separation device comprises a shell, a plurality of membrane tubes and a plurality of heating tubes, an accommodating cavity is arranged in the shell, and the plurality of membrane tubes are arranged in the accommodating cavity at intervals and are used for separating materials; the multiple heating pipes are arranged in the containing cavity and located among the multiple membrane pipes, the cavity wall of the containing cavity, the outer walls of the multiple membrane pipes and the outer walls of the multiple heating pipes define a material cavity for materials to flow, and the multiple heating pipes are used for heating the materials in the material cavity. Therefore, uniformity and timeliness of material heat compensation of the membrane separation device are guaranteed, and the problem of large equipment investment caused by excessive heat compensation capacity of the membrane separation device is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the membrane separation technical field especially relates to a membrane separation device. BACKGROUND

[0002] Membrane separation generally refers to the operation process of separating fluid mixture by using the selective permeation characteristics of membrane to different components in fluid mixture. Membrane separation technology is widely used in petroleum chemical industry, biological medicine, food processing and environmental protection engineering and other fields.

[0003] Since the permeation vaporization (vapor permeation) separation performance of the membrane is closely related to temperature, with the decrease of temperature, the flux and processing capacity of the membrane will be greatly reduced, and the heat supplement uniformity and timeliness of the existing membrane separation device are insufficient, which will affect the membrane separation performance of the membrane separation device, or the heat supplement capacity is excessive, causing large equipment investment. UTILITY MODEL CONTENT

[0004] The utility model discloses a membrane separation device, which aims to solve the problems of insufficient heat supplement uniformity and timeliness of the existing membrane separation device, which will affect the membrane separation performance of the membrane separation device, or excessive heat supplement capacity, causing large equipment investment.

[0005] The utility model provides a membrane separation device, the membrane separation device includes:

[0006] Shell, the shell is provided with accommodating cavity in;

[0007] A plurality of membrane tubes, a plurality of membrane tubes are spaced apart and arranged in the accommodating cavity, and are used for separating material;

[0008] And a plurality of heating pipes, a plurality of heating pipes are arranged in the accommodating cavity and are located between a plurality of membrane tubes;

[0009] Wherein, the cavity wall of the accommodating cavity and the outer wall of a plurality of membrane tubes, the outer wall of a plurality of heating pipes are enclosed to form material cavity for material flow, and a plurality of heating pipes are used to heat the material in the material cavity.

[0010] In one of the embodiments, the membrane separation device further includes a first partition plate, the first partition plate is arranged in the shell to separate the inner cavity of the shell to form the accommodating cavity and the vacuum cavity, a plurality of perforations are arranged on the first partition plate, and the ends of a plurality of membrane tubes are respectively arranged in a plurality of perforations of the first partition plate and extend into the vacuum cavity.

[0011] In one embodiment, the membrane separation device further comprises a plurality of second partition plates, each of the second partition plates is provided with a plurality of perforations, the plurality of membrane tubes and the plurality of heating tubes are respectively arranged in the plurality of perforations of the plurality of second partition plates, and the plurality of second partition plates are arranged in a staggered manner in the accommodating cavity to divide the material cavity into a serpentine flow channel.

[0012] In one embodiment, the shell comprises a first shell and a second shell detachably connected with the first shell, the first partition plate is arranged between the first shell and the second shell, one side of the first partition plate and the inner cavity of the first shell form the accommodating cavity, and the other side of the first partition plate and the inner cavity of the second shell form the vacuum cavity.

[0013] In one embodiment, the shell further comprises a third shell, and the second shell and the third shell are respectively detachably connected to two sides of the first shell.

[0014] The first shell is provided with a material inlet and a material outlet arranged away from the material inlet, and the material inlet and the material outlet are both connected with the material cavity.

[0015] The second shell is provided with a vacuum outlet connected with the vacuum cavity.

[0016] The heating tube is filled with a heating medium, the second shell is further provided with a heating inlet connected with the heating tube, and the third shell is provided with a heating outlet connected with the heating tube.

[0017] In one embodiment, two sides of the first partition plate are respectively detachably connected with the first shell and the second shell, and ends of the plurality of heating tubes are respectively arranged in the plurality of perforations of the first partition plate and extend into the vacuum cavity.

[0018] The first partition plate, the plurality of membrane tubes and the plurality of heating tubes constitute a membrane core integrated as a whole, and the membrane core is detachably installed in the shell.

[0019] In one embodiment, the membrane core is provided with one, the first shell is provided with a material inlet and a material outlet arranged away from the material inlet, and the material inlet and the material outlet are both connected with the material cavity, the second shell is provided with a vacuum outlet connected with the vacuum cavity, the heating tube is filled with a heating medium, and the second shell is further provided with a heating inlet and a heating outlet connected with the heating tube.

[0020] Or, the membrane core is provided with two, and is respectively inserted in the two sides of the first shell, the second shell is correspondingly provided with two, and is respectively detachably connected to the two sides of the first shell;The first shell is provided with a material inlet and a material outlet away from the material inlet, the material inlet and the material outlet are communicated with the material cavity;Each of the second shell is provided with a vacuum extraction port communicated with the corresponding vacuum cavity;The heating pipe flows with heating medium, each of the second shell is provided with a heating inlet and a heating outlet communicated with the heating pipe.

[0021] In one embodiment, the membrane core further comprises a membrane shell, the first partition plate, the plurality of membrane tubes and the plurality of heating pipes are integrally installed on the membrane shell, the membrane shell, the first partition plate, the outer walls of the plurality of membrane tubes and the outer walls of the plurality of heating pipes form a material cavity for material flow, the membrane shell is provided with an inlet and an outlet communicated with the material cavity;

[0022] The first shell is provided with a material inlet and a material outlet away from the material inlet, the material inlet and the material outlet are communicated with the inlet and the outlet of the membrane shell respectively;The second shell is provided with a vacuum extraction port communicated with the vacuum cavity;The heating pipe flows with heating medium, the second shell is further provided with a heating inlet and a heating outlet communicated with the heating pipe.

[0023] In one embodiment, the membrane core further comprises a plurality of third partition plates, the plurality of third partition plates are arranged in the material cavity and parallel to the plurality of membrane tubes to divide the material cavity into a plurality of material sub-cavities, and the third partition plates are provided with through holes communicating adjacent two material sub-cavities.

[0024] In one embodiment, the first shell is provided with a plurality of separation cavities, the membrane core is provided with a plurality of membrane cores, the plurality of membrane cores are arranged in the plurality of separation cavities one by one, the second shell is provided with a plurality of second shells, and the plurality of second shells are detachably installed on the first shell one by one and surrounded by the plurality of first partition plates to form a plurality of vacuum cavities;And / or,

[0025] The membrane core is arranged in a rectangular body, and the membrane separation device is arranged in a rectangular body.

[0026] The embodiment of the utility model has the following beneficial effects:

[0027] The membrane separation device adopts the utility model, the cavity wall of the accommodating cavity and the outer wall of the plurality of membrane tubes and the outer wall of the plurality of heating pipes are enclosed to form a material cavity for material flow, the plurality of heating pipes are used for heating the material in the material cavity, through such arrangement, the heating pipes are flexibly arranged in the material cavity, thereby ensuring the uniformity and timeliness of the membrane separation device for material heat supplement, and the problem of excessive heat supplement capacity of the membrane separation device and large equipment investment is solved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0029] Among them:

[0030] Figure 1 It is a schematic view of the layout of the membrane tube and the heating pipe in the membrane separation device of an embodiment.

[0031] Figure 2 It is a schematic view of the heating pipe associated components in the membrane separation device of an embodiment.

[0032] Figure 3 It is a schematic view of the heating pipe and the first pipe body in the membrane separation device of an embodiment.

[0033] Figure 4 It is a schematic view of the membrane separation device of an embodiment.

[0034] Figure 5 It is a schematic view of the membrane separation device of an embodiment.

[0035] Figure 6 It is a schematic view of the membrane separation device of an embodiment.

[0036] Figure 7 It is a schematic view of the membrane core in the membrane separation device of an embodiment.

[0037] Figure 8 It is Figure 7 The front view of the membrane core.

[0038] Figure 9 It is Figure 7 The sectional view of the membrane core.

[0039] Figure 10 It is a front view of the membrane separation device of an embodiment.

[0040] Figure 11 It is Figure 10A plan view of the membrane separation device shown.

[0041] Figure 12 For Figure 11 A sectional view of the membrane separation device shown.

[0042] Reference signs: 110, housing; 111, first shell; 112, second shell; 113, third shell; 114, partition cavity; 120, membrane tube; 130, heating tube; 140, first partition plate; 150, second partition plate; 160, third partition plate; 170, membrane shell; 171, guide rail; 181, first tube body; 182, second tube body; 201, material inlet; 202, material outlet; 203, vacuum extraction port; 204, heating inlet; 205, heating outlet; 210, accommodating cavity; 220, material cavity; 230, vacuum cavity. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0046] In the field of membrane separation, the processes of permeation gasification and vaporization permeation are separation processes in which mass transfer and heat transfer exist simultaneously, and concentration polarization and temperature polarization phenomena will occur, so the flow state of the material (raw material liquid) on the membrane surface and timely heat compensation are important factors affecting the separation process. Increasing the turbulence degree of the material flow, reducing the concentration boundary layer and temperature boundary layer, ensuring that the material flow is updated faster on the membrane surface interface, and timely heat compensation of the material can reduce the influence of concentration polarization and temperature polarization on the membrane separation performance.

[0047] Based on this, the utility model discloses a membrane separation device, please refer to Figures 1 to 12 The membrane separation device includes a shell 110, a plurality of membrane tubes 120 and a plurality of heating pipes 130, the shell 110 is provided with a containing cavity 210; the plurality of membrane tubes 120 are arranged at intervals in the containing cavity 210 and are used for separating materials; the plurality of heating pipes 130 are arranged in the containing cavity 210 and are located between the plurality of membrane tubes 120, the cavity wall of the containing cavity 210, the outer wall of the plurality of membrane tubes 120 and the outer wall of the plurality of heating pipes 130 form a material cavity 220 for material flow, and the plurality of heating pipes 130 are used for heating the material in the material cavity 220. Through such arrangement, the heating pipes 130 can be arranged flexibly in the material cavity 220, thereby ensuring the uniformity and timeliness of the material heat compensation of the membrane separation device.

[0048] It can be understood that the plurality of flexibly arranged heating pipes 130 can uniformly and timely compensate the heat of the material to control the temperature of the material within a preset range, thereby eliminating the phenomenon that the dehydration rate is affected by the decrease of the material temperature caused by the heat consumption of dehydration, and simultaneously, since the temperature of the material is controlled within the preset range, the membrane separation dehydration can be ensured to be in the high-efficiency zone.

[0049] The membrane separation device of the utility model is adopted, the material is fully contacted with the heating pipe 130 and the membrane tube 120 in the flow process, the heat transfer and mass transfer functions are realized, the number and position of the heating pipe 130 and the membrane tube 120 can be arranged according to the heat compensation demand of membrane dehydration according to a certain proportion, the heating medium is introduced into the heating pipe 130 to directly heat the raw material, and the heating pipe 130 is flexibly arranged according to the process demand in the device, thereby ensuring the uniformity and timeliness of the heating.

[0050] In an embodiment, the membrane separation device further comprises a first partition plate 140 arranged in the shell 110 to divide the inner cavity of the shell 110 into the accommodating cavity 210 and the vacuum cavity 230, the first partition plate 140 is provided with a plurality of perforations, and the ends of the plurality of membrane tubes 120 are respectively arranged in the plurality of perforations of the first partition plate 140 and extend into the vacuum cavity 230. Specifically, one end of the membrane tube 120 is in communication with the vacuum cavity 230, and the other end is provided with a first end seal. In this way, the inner cavity of the membrane tube 120 can form a vacuum, and the low pressure and vacuum state can drive the membrane layer of the membrane tube 120 to separate the material.

[0051] In the embodiment, the first partition plate 140 can be a porous metal plate.

[0052] In an embodiment, the membrane separation device further comprises a plurality of second partition plates 150, each of the plurality of second partition plates 150 is provided with a plurality of perforations, and the plurality of membrane tubes 120 and the plurality of heating tubes 130 are respectively arranged in the plurality of perforations of the plurality of second partition plates 150. The plurality of second partition plates 150 are arranged in a staggered manner in the accommodating cavity 210 to divide the material cavity 220 into a serpentine flow channel, increase the turbulence degree of the material flow, reduce the concentration boundary layer and the temperature boundary layer, ensure the uniform distribution of the fluid on the membrane surface, and reduce the influence of concentration and temperature polarization on the membrane separation performance.

[0053] In the embodiment, the second partition plate 150 can be a metal plate, a PTFE plate, a PFA plate, etc.

[0054] Specifically, the heating tube 130 is fixedly connected with the perforations of the first partition plate 140, the heating tube 130 and the first partition plate 140 can be connected and fixed by one or more of expansion, welding, expansion welding, etc., and the membrane tube 120 is detachably and sealingly connected with the perforations of the first partition plate 140.

[0055] In an embodiment, the shell 110 comprises a first shell 111 and a second shell 112 detachably connected with the first shell 111, the first partition plate 140 is arranged between the first shell 111 and the second shell 112, one side of the first partition plate 140 is in surrounding relationship with the inner cavity of the first shell 111 to form the accommodating cavity 210, and the other side of the first partition plate 140 is in surrounding relationship with the inner cavity of the second shell 112 to form the vacuum cavity 230, so as to realize the separate arrangement of the vacuum cavity 230 and the accommodating cavity 210.

[0056] In an embodiment, please refer to Figure 4The shell 110 further comprises a third shell 113, the second shell 112 and the third shell 113 are respectively detachably connected to two sides of the first shell 111; the first shell 111 is provided with a material inlet 201 and a material outlet 202 which is away from the material inlet 201, the material inlet 201 and the material outlet 202 are both communicated with the material cavity 220; the second shell 112 is provided with a vacuum extraction port 203 which is communicated with the vacuum cavity 230; the heating pipe 130 is filled with heating medium, the second shell 112 is further provided with a heating inlet 204 which is communicated with the heating pipe 130, and the third shell 113 is provided with a heating outlet 205 which is communicated with the heating pipe 130.

[0057] Through the above arrangement, the heating medium in the heating pipe 130 flows in from the side of the second shell 112 and flows out from the side of the third shell 113. In this embodiment, the membrane separation device is in a cylindrical shape. Specifically, the heating pipe 130 can be a metal pipe, the heating inlet 204 and the heating outlet 205 are connected with the second pipe body 182 through a hose, which is convenient for assembly and disassembly.

[0058] Taking the structure of the membrane separation device in this embodiment as an example, the diameter of the shell 110 is DN900, that is, the diameter of the shell 110 is 900mm, the radius is 450mm, the minimum arrangement spacing between the membrane tubes is 19mm, the outer diameter of the heating pipe is 14mm, and the length is 920mm. The outer diameter of the membrane tube is 12mm, the length is 1030mm, the number of arranged membrane tubes is 1359, and the number of heat supplement metal pipes is 456.

[0059] The heat supplement area is: 456x∏x14mmx920mm=18.49m 2 .

[0060] The membrane area is: 1359x∏x12mmx1030mm=52.77m 2 .

[0061] Therefore, the heat supplement density is: 18.49m 2 / 52.77m 2 =0.35.

[0062] The membrane filling density is: 52.77m 2 / (∏x450 2 x1030m 2 x10 -9 )=80.5m 2 / m 3 .

[0063] From the above structural analysis, under the premise of meeting the heat supplement density, the membrane filling density of the membrane separation device is high.

[0064] In another embodiment, please refer to Figures 5 to 12The two sides of the first partition plate 140 are detachably connected with the first shell 111 and the second shell 112 respectively, the ends of the plurality of heating pipes 130 are respectively arranged in the plurality of perforations of the first partition plate 140 and extend into the vacuum cavity 230; wherein the first partition plate 140, the plurality of membrane tubes 120 and the plurality of heating pipes 130 constitute a membrane core integrated as a whole, and the membrane core is detachably installed in the shell 110. Through such arrangement, the membrane core is convenient to disassemble, replace and maintain. In the embodiment, the heating pipe 130 is a U-shaped metal pipe.

[0065] In an embodiment, referring to Figures 5 to 8 The membrane separation device further comprises a first pipe body 181 and a second pipe body 182, the first pipe body 181 is in communication with the plurality of heating pipes 130 in the first heating group, and the first pipe body 181 is provided with a plurality of first pipe bodies 181 corresponding to the plurality of first heating groups respectively, and the second pipe body 182 is in communication with the plurality of first pipe bodies 181 to realize the collection of the heating medium. Specifically, the first pipe body 181 and the second pipe body 182 are metal pipes. Specifically, the first pipe body 181 is detachably connected with the plurality of heating pipes 130 in the first heating group, and the second pipe body 182 is detachably connected with the plurality of first pipe bodies 181.

[0066] Further, in the embodiment, referring to Figure 5 The membrane core is provided with one, the first shell 111 is provided with a material inlet 201 and a material outlet 202 away from the material inlet 201, and the material inlet 201 and the material outlet 202 are in communication with the material cavity 220; the second shell 112 is provided with a vacuum outlet 203 in communication with the vacuum cavity 230; the heating pipe 130 flows with a heating medium, and the second shell 112 is further provided with a heating inlet 204 and a heating outlet 205 in communication with the heating pipe 130, and the heating inlet 204 and the heating outlet 205 are arranged on the second shell 112, which is convenient for disassembling and replacing the membrane core.

[0067] After the material enters the material cavity 220, it flows through the membrane tube 120 and the heating pipe 130 in sequence to dehydrate and heat, and is forced to flow back and forth by the second partition plate 150, thereby enhancing the dehydration effect. The heating inlet 204 and the heating outlet 205 are connected with the second pipe body 182 through a hose, thereby further facilitating assembly and disassembly.

[0068] Of course, in other embodiments, referring to Figure 6, the membrane core can also be provided with two, and respectively inserted in the two sides of the first shell 111, the second shell 112 is correspondingly provided with two, and can be respectively detachably connected to the two sides of the first shell 111; The first shell 111 is provided with a material inlet 201 and a material outlet 202 away from the material inlet 201, and the material inlet 201 and the material outlet 202 are communicated with the material cavity 220; Each second shell 112 is provided with a vacuum extraction port 203 communicated with the corresponding vacuum cavity 230; The heating pipe 130 flows with heating medium, and each second shell 112 is also provided with a heating inlet 204 and a heating outlet 205 communicated with the heating pipe 130, so that the membrane core is respectively detachably replaced from the two sides of the first shell 111, the double membrane core mounting structure is adopted, and the packing density of the membrane separation device is further improved, and the membrane space density of the device is reduced.

[0069] In another embodiment, please refer to Figures 7 to 12 , the membrane core further comprises a membrane shell 170, the first partition plate 140, the plurality of membrane tubes 120 and the plurality of heating pipes 130 are integrally installed on the membrane shell 170, the membrane shell 170 and the outer walls of the first partition plate 140, the plurality of membrane tubes 120 and the plurality of heating pipes 130 enclose a material cavity 220 for material flow, and the membrane shell 170 is provided with an inlet and an outlet communicated with the material cavity 220; The first shell 111 is provided with a material inlet 201 and a material outlet 202 away from the material inlet 201, and the material inlet 201 and the material outlet 202 are respectively communicated with the inlet and the outlet of the membrane shell 170; The second shell 112 is provided with a vacuum extraction port 203 communicated with the vacuum cavity 230; The heating pipe 130 flows with heating medium, and the second shell 112 is also provided with a heating inlet 204 and a heating outlet 205 communicated with the heating pipe 130. In this embodiment, the heating pipe 130 is a U-shaped metal pipe.

[0070] By so arranging, the first partition plate 140, the plurality of membrane tubes 120 and the plurality of heating pipes 130 are integrally installed on the membrane shell 170, facilitating the integration of the membrane core. Specifically, the membrane shell 170 is provided with a first guide rail 171, and the first shell 111 is provided with a roller needle sliding device matched with the first guide rail 171, facilitating the assembly and disassembly of the membrane core.

[0071] Further, in this embodiment, the membrane core further comprises a plurality of third partition plates 160, the plurality of third partition plates 160 are arranged in the material cavity 220 and are parallel to the plurality of membrane tubes 120, so as to divide the material cavity 220 into a plurality of material sub-cavities, and the third partition plate 160 is provided with a through hole communicating adjacent two material sub-cavities. By so arranging, the turbulence degree of material flow is increased, the concentration boundary layer and the temperature boundary layer are reduced, the fluid distribution on the membrane surface is more uniform, and the influence of concentration and temperature polarization on the membrane separation performance can be reduced.

[0072] Further, in the embodiment, the first shell 111 is provided with a plurality of partition cavities 114, a plurality of membrane cores are arranged one by one in the plurality of partition cavities 114, and the second shell 112 is provided with a plurality of second shells and is detachably mounted on the first shell 111 one by one, and is enclosed with the plurality of first partition plates 140 to form a plurality of vacuum cavities 230. The plurality of membrane cores can be arranged flexibly in the shell 110.

[0073] In the embodiment, please refer to Figure 1 , In the embodiment, please refer to Figures 7 to 9 , the plurality of heating pipes 130 are arranged along the first direction and extend along the second direction to form a first heating group, and the plurality of first heating groups are arranged along the third direction; the plurality of membrane tubes 120 are arranged along the first direction and the third direction and extend along the second direction to form a first separation group, and the plurality of first separation groups are arranged between adjacent two first heating groups to realize flexible arrangement of the heating pipes 130 and the membrane tubes 120.

[0074] Figure 1 The direction of the arrow in the figure is the flow direction of the material.

[0075] Figure 7 In the figure, the direction of the arrow X is the first direction, the direction of the arrow Y is the second direction, and the direction of the arrow Z is the third direction.

[0076] Further, the plurality of membrane tubes 120 and the plurality of heating pipes 130 are arranged in a regular triangle, a corner regular triangle, a square, and a corner square, so as to ensure the uniformity and timeliness of the heating of the material by the heating pipes 130.

[0077] By such arrangement, changing the flow state of the material can form good operating conditions, improve the membrane separation efficiency, and reduce the membrane process pollution. According to the flow direction of the material between the membrane tube 120 and the heating pipe 130, the membrane tube 120 and the heating pipe 130 can be arranged in a regular triangle, a corner regular triangle, a square, and a corner square, so as to forcibly flow the material to reach a turbulent state from the structure.

[0078] At the same time, the membrane core is flexibly arranged, so that the flow speed of the material on the membrane surface after entering the membrane core reaches the efficient interval of membrane dehydration. In order to reflect the amplification effect of the dehydration effect of the membrane after being amplified to the industrial device, according to the dehydration amount ratio of the membrane product under the laboratory working condition and the industrial working condition, the concept of "industrial dehydration efficiency" is introduced, that is, under the same process condition, the industrial membrane assembly membrane permeation flux per square meter of membrane area / experimental membrane assembly membrane permeation flux (unit: %), and the industrial dehydration efficiency can reach 100%.

[0079] Specifically, the membrane core is arranged in a rectangular body, and the membrane separation device is arranged in a rectangular body. Compared with the traditional cylindrical structure, the material flow channel size is the same in the rectangular structure, and the material is in a stable and controllable state during the flow process, thereby fully utilizing the dewatering efficiency of the membrane tube 120. In the embodiment, the number and arrangement form of the separation cavities 114 can be expanded to infinitely expand the internal cavity of the first shell 111, that is, increase the number of membrane core installations of a single membrane separation device, improve the packing density of the membrane assembly, and reduce the membrane space density of the device.

[0080] The membrane core of the embodiment can flexibly configure the setting ratio of the internal membrane tube 120 and the heating pipe 130 according to process requirements. According to the heat supplement demand, the concept of “heat supplement density” is introduced, that is, heat supplement area / membrane area (unit: m 2 / m 2 ), and the value range is 0.1-1.3 m 2 / m 2 . According to process calculation, when the liquid is dewatered, the water permeation amount per square meter of membrane area is 3 kg, the heat supplement demand is 1.8 kJ, the saturated steam at 0.5 MPa and 150°C is used as the heat source, and the required heat supplement area is 0.6 m 2 . The heat supplement density can be flexibly set to meet the heat supplement demand.

[0081] In addition, while meeting the heat supplement demand, the membrane separation device can achieve high “packing density”, that is, membrane area / device volume (unit: m 2 / m 3 ), and the packing density can be up to 150 m 2 / m 2 .

[0082] Moreover, the membrane separation device of the embodiment realizes large-scale design of a single membrane separation device, and the membrane area of the membrane separation device can be theoretically infinitely large. Under the condition of meeting the conventional road transportation (the maximum outer dimension is not more than 2.5 m x 2.5 m), the membrane area of one membrane core can reach 42.69 m 2 , and a single membrane separation device can install up to 16 membrane cores, with a total membrane area of 42.69 m 2 x 16 = 683.04 m 2 .

[0083] The membrane separation device of the embodiment solves the problems of large number of large-scale membrane separation devices, large occupied area, and difficult maintenance. To evaluate the physical space occupied by the membrane separation dewatering device, the concept of “membrane space density” is introduced, that is, the minimum installation volume of the membrane assembly in the membrane separation device / membrane area (unit: m 3 / m 2 ), such as the above-mentioned 636.8 m 2The membrane area device is an example of a membrane space density as low as 0.05 m 3 / m 2 .

[0084] The above only discloses the preferred embodiments of the present application, and of course cannot limit the scope of the present application, therefore, equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A membrane separation device, characterized by, The membrane separation device comprises: a housing, a containing cavity is arranged in the housing; a plurality of membrane tubes, the plurality of membrane tubes are arranged in the containing cavity and are used for separating materials; a plurality of heating pipes, the plurality of heating pipes are arranged in the containing cavity and are located between the plurality of membrane tubes; wherein, the cavity wall of the containing cavity, the outer wall of the plurality of membrane tubes and the outer wall of the plurality of heating pipes form a material cavity for the flow of materials, and the plurality of heating pipes are used for heating the materials in the material cavity.

2. The membrane separation device of claim 1, wherein, The membrane separation device further comprises a first partition plate, the first partition plate is arranged in the housing to separate the inner cavity of the housing into the containing cavity and a vacuum cavity, a plurality of perforations are arranged on the first partition plate, 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.

3. The membrane separation device of claim 2, wherein, The membrane separation device further comprises a plurality of second partition plates, each of the plurality of second partition plates is provided with a plurality of perforations, the plurality of membrane tubes and the plurality of heating pipes are respectively arranged in the plurality of perforations of the plurality of second partition plates, and the plurality of second partition plates are arranged in the containing cavity and are staggered with each other to separate the material cavity into a serpentine flow channel.

4. The membrane separation device according to claim 2 or 3, characterized in that The housing comprises a first shell and a second shell which is detachably connected with the first shell, the first partition plate is arranged between the first shell and the second shell, one side of the first partition plate and the inner cavity of the first shell form the containing cavity, and the other side of the first partition plate and the inner cavity of the second shell form the vacuum cavity.

5. The membrane separation device of claim 4, wherein, The housing further comprises a third shell, the second shell and the third shell are respectively detachably connected to the two sides of the first shell; The first shell is provided with a material inlet and a material outlet which is arranged away from the material inlet, and the material inlet and the material outlet are in communication with the material cavity; The second shell is provided with a vacuum extraction port which is in communication with the vacuum cavity; The heating medium flows in the heating pipe, the second shell is further provided with a heating inlet which is in communication with the heating pipe, and the third shell is provided with a heating outlet which is in communication with the heating pipe.

6. The membrane separation device of claim 4, wherein, The two sides of the first partition plate are respectively detachably connected with the first shell and the second shell, the ends of the plurality of heating pipes are respectively arranged in the plurality of perforations of the first partition plate and extend into the vacuum cavity; wherein, the first partition plate, the plurality of membrane tubes and the plurality of heating pipes constitute a membrane core which is integrated as a whole, and the membrane core is detachably installed in the housing.

7. The membrane separation device of claim 6, wherein, The membrane core is provided with one, the first shell is provided with a material inlet and a material outlet which is arranged away from the material inlet, and the material inlet and the material outlet are in communication with the material cavity; the second shell is provided with a vacuum extraction port which is in communication with the vacuum cavity; the heating medium flows in the heating pipe, the second shell is further provided with a heating inlet and a heating outlet which are in communication with the heating pipe; Or, the membrane core is provided with two, and respectively inserted in the two sides of the first shell, the second shell is provided with two, and respectively can be detachably connected to the two sides of the first shell; The first shell is provided with a material inlet, and a material outlet away from the material inlet, the material inlet and the material outlet are communicated with the material cavity; Each of the second shell is provided with a vacuum extraction port communicated with the corresponding vacuum cavity; The heating pipe flows with heating medium, each of the second shell is provided with a heating inlet and a heating outlet communicated with the heating pipe.

8. The membrane separation device of claim 6, wherein, The membrane core further comprises a membrane shell, the first partition plate, the plurality of membrane tubes and the plurality of heating pipes are integrally installed on the membrane shell, the membrane shell, the first partition plate, the outer wall of the plurality of membrane tubes and the outer wall of the plurality of heating pipes are enclosed to form a material cavity for material flow, the membrane shell is provided with an inlet and an outlet communicated with the material cavity; The first shell is provided with a material inlet, and a material outlet away from the material inlet, the material inlet and the material outlet are communicated with the inlet and the outlet of the membrane shell; The second shell is provided with a vacuum extraction port communicated with the vacuum cavity; The heating pipe flows with heating medium, the second shell is further provided with a heating inlet and a heating outlet communicated with the heating pipe.

9. The membrane separation device of claim 8, wherein, The membrane core further comprises a plurality of third partition plates, the plurality of third partition plates are arranged in the material cavity and parallel to the plurality of membrane tubes, so as to divide the material cavity into a plurality of material sub-cavities, and the third partition plate is provided with a through hole communicated with two adjacent material sub-cavities.

10. The membrane separation device of claim 8, wherein, The first shell is provided with a plurality of separation cavities, the membrane core is provided with a plurality of, the plurality of membrane cores are arranged in the plurality of separation cavities one by one, the second shell is provided with a plurality of, and is detachably installed on the first shell one by one, and is enclosed with the plurality of first partition plates to form a plurality of vacuum cavities; And / or, The membrane core is arranged in a rectangular body, and the membrane separation device is arranged in a rectangular body.

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