A highly integrated modular large membrane stack device

Abstract

The application relates to the technical field of seawater desalination, and discloses a highly integrated modular large membrane stack device which comprises two groups of frames, multiple frames in the same group are vertically stacked, multiple reverse osmosis membrane tubes are arranged in the frames, the frames and the reverse osmosis membrane tubes in the frames form a modular treatment unit, the reverse osmosis membrane tube comprises a membrane shell, a membrane core is arranged in the membrane shell, and a pre-filtering assembly is arranged in the membrane shell. Through the arrangement of the modular treatment unit, one frame and the reverse osmosis membrane tube in the frame serve as a modular treatment unit, when the modular treatment unit is installed, only the stacking and pipeline butt joint operation of multiple modular treatment units need to be performed on site, the modular treatment unit with a fault can be individually overhauled without stopping the whole system, and the copy connection mode greatly improves the installation and post-maintenance efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seawater desalination, and particularly relates to a highly integrated modular large-scale membrane stack device. BACKGROUND

[0002] In recent years, the demand for overseas seawater desalination projects has shown an explosive growth trend. Membrane seawater desalination technology has been widely used worldwide due to its outstanding advantages of high efficiency and energy saving. As the core processing unit in this technology system, the transportation efficiency and on-site installation progress of the reverse osmosis membrane stack directly determine whether the overall project schedule can be advanced as planned. Overseas projects often face multiple challenges such as long transportation distance, poor on-site construction environment, high local labor cost, and shortage of professional installation technicians.

[0003] However, the existing technology has the following problems:

[0004] The existing reverse osmosis membrane stack is mostly transported in scattered parts and assembled on site during transportation and installation. The installation and debugging of all core components such as membrane frames, membrane shells, pipelines, and membrane elements need to be completed on site. However, in actual operation, scattered parts are prone to deformation, displacement, and even structural damage during long-distance transportation due to jolting. This results in the inability to carry out on-site installation of membrane stack components according to the established construction plan. In addition, special packaging devices need to be customized to protect the scattered parts, which not only increases the workload of component counting but also occupies additional transportation space, significantly increasing the overall logistics cost. SUMMARY

[0005] The purpose of the present application is to solve the above problems and provide a highly integrated modular large-scale membrane stack device to overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above purpose, the present application provides the following technical solutions:

[0007] The application provides a highly integrated modular large membrane stack device, which comprises two groups of frames, a plurality of frames in the same group are vertically stacked, a plurality of reverse osmosis membrane tubes are arranged in the frames, the frames and the reverse osmosis membrane tubes in the frames form a modular treatment unit, the reverse osmosis membrane tube comprises a membrane shell, a membrane core is arranged in the membrane shell, one end of the membrane shell is connected with a water inlet pipe group, the other end of the membrane shell is connected with a fresh water outlet pipe and a concentrated water outlet pipe, and the device further comprises a water inlet pipe line, a water production pipe line and a concentrated water pipe line.

[0008] Preferably, a plurality of maintenance tables are connected between the two groups of frames, and a ladder is arranged on the frame and used for climbing onto the maintenance table.

[0009] Preferably, the maximum number of reverse osmosis membrane tubes in the modular treatment unit is thirty-six, and the water inlet pipe group, the fresh water outlet pipe and the concentrated water outlet pipe on the reverse osmosis membrane tube are connected with the water inlet pipe line, the water production pipe line and the concentrated water pipe line by using short pipes and clamps.

[0010] Preferably, the first filter screen is located on the side of the second filter screen close to the water inlet pipe group, the second filter screen is located on the side of the third filter screen close to the water inlet pipe group, the filter hole diameter of the first filter screen is larger than that of the second filter screen, the filter hole diameter of the second filter screen is larger than that of the third filter screen, and the first filter screen, the second filter screen and the third filter screen are all conical, and are used for filtering seawater entering the membrane shell from the water inlet pipe group in three layers to remove larger impurities in the seawater.

[0011] Preferably, the pre-filtering assembly further comprises a residue discharge pipe, the residue discharge pipe is arranged on the inner wall of the membrane shell, a sleeve pipe is rotatably connected to the outer wall of the residue discharge pipe, a impeller is connected to the outer wall of the sleeve pipe, the impeller is located on the side of the first filter screen close to the water inlet pipe group, the sleeve pipe is rotatably connected with the first filter screen, the second filter screen and the third filter screen, three pairs of first through grooves are formed in the sleeve pipe, the three pairs of first through grooves are respectively located on the side of the center of the first filter screen, the second filter screen and the third filter screen close to the water inlet pipe group, three pairs of second through grooves are formed in the residue discharge pipe, the three first through grooves can respectively overlap with the three second through grooves when the sleeve pipe rotates, the first filter screen, the second filter screen and the third filter screen can discharge the impurities deposited on the surfaces into the residue discharge pipe when the three first through grooves overlap with the three second through grooves, and the residue discharge pipe is communicated with the concentrated water pipe line.

[0012] As preferred, three sets of brushes are connected to the sleeve, and the three sets of brushes are in contact with the first filter screen, the second filter screen and the third filter screen respectively, and the brushes are arranged in an arc shape.

[0013] As preferred, the pre-filtering assembly further comprises a rotary cutting mechanism, the rotary cutting mechanism comprises a grid installed on the inner wall of the membrane shell, the grid is located between the impeller and the water inlet pipe group, the sleeve is rotationally connected to the center part of the grid, two blades are connected to the outer wall of the sleeve, and the blades are in contact with the side of the grid close to the water inlet pipe group.

[0014] As preferred, the pre-filtering assembly further comprises an anti-blocking mechanism, the anti-blocking mechanism comprises a sliding shaft, the sliding shaft is slidingly connected to one end of the residue discharge pipe close to the first filter screen, a sliding tongue is connected to the sliding shaft, a groove ring is connected to the inner wall of the sleeve, an annular inclined groove is formed in the groove ring, the sliding tongue is slidingly connected to the annular inclined groove, the groove ring can drive the sliding tongue and the sliding shaft to move horizontally and reciprocally through the annular inclined groove when the groove ring rotates, one end of the sliding shaft inside the residue discharge pipe is connected to an inner rod, a plurality of first scraping rings are connected to the outer wall of the inner rod, and the plurality of first scraping rings are slidingly connected to the inner wall of the residue discharge pipe.

[0015] As preferred, the residue discharge pipe is provided with a bend, a second scraping ring is slidingly connected to the bend of the residue discharge pipe, an exposed rod is connected to the inner side of the second scraping ring, a connecting rod is rotationally connected to the exposed rod, and the end of the connecting rod away from the exposed rod is hingedly connected to the inner rod.

[0016] The beneficial effects are that:

[0017] 1. The highly integrated modular large membrane stack device, by arranging the modular processing units, one frame and the reverse osmosis membrane pipes inside the frame as a modular processing unit, the single modular processing unit can be directly transported by a container, which is convenient and efficient for transportation, and when installing, only the stacking and pipeline butt joint operation of multiple modular processing units are needed on site, and when a fault occurs, the faulty modular processing unit can be individually repaired without the need to shut down the entire system, at the same time, the copy connection mode greatly improves the installation and maintenance efficiency, and achieves the effects of reducing transportation difficulty, simplifying the installation process and shortening the on-site construction period.

[0018] 2、The highly integrated modular large membrane stack device, through the setting of the pre-filtering assembly, the first filter screen, the second filter screen and the third filter screen can pre-filter seawater, thereby intercepting most impurities, and the seawater after pre-filtering enters the membrane core, greatly reducing the filtering strength of the membrane core and prolonging the service life of the membrane core; through the setting of the residue discharge pipe, the residue discharge pipe intermittently makes the impurities accumulated at the center of the first filter screen, the second filter screen and the third filter screen enter the residue discharge pipe through the cooperation of the residue discharge pipe and the sleeve pipe, and then is discharged from the membrane shell, achieving the technical effect of automatic residue discharge, avoiding that the first filter screen, the second filter screen and the third filter screen are affected by the filtering effect and the seawater flow resistance due to the accumulation of more impurities on the surface.

[0019] 3、The highly integrated modular large membrane stack device, through the setting of the pre-filtering assembly, the first filter screen, the second filter screen and the third filter screen can pre-filter seawater, thereby intercepting most impurities, and the seawater after pre-filtering enters the membrane core, greatly reducing the filtering strength of the membrane core and prolonging the service life of the membrane core; through the setting of the residue discharge pipe, the residue discharge pipe intermittently makes the impurities accumulated at the center of the first filter screen, the second filter screen and the third filter screen enter the residue discharge pipe through the cooperation of the residue discharge pipe and the sleeve pipe, and then is discharged from the membrane shell, achieving the technical effect of automatic residue discharge, avoiding that the first filter screen, the second filter screen and the third filter screen are affected by the filtering effect and the seawater flow resistance due to the accumulation of more impurities on the surface. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0021] Figure 1 is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 is a schematic diagram of the water inlet pipeline structure of the present application;

[0023] Figure 3 is a schematic diagram of the maintenance platform structure of the present application;

[0024] Figure 4 is a schematic diagram of the appearance of the reverse osmosis membrane tube of the present application;

[0025] Figure 5 is a schematic diagram of the reverse osmosis membrane tube structure of the present application;

[0026] Figure 6 is a schematic diagram of the pre-filtering assembly structure of the present application;

[0027] Figure 7 is a schematic diagram of the impeller structure of the present application;

[0028] Figure 8 is a schematic diagram of the sleeve pipe structure of the present application;

[0029] Figure 9 is a schematic diagram of the brush structure of the present application;

[0030] Figure 10 is a structural schematic diagram of the rotary cutting mechanism of the present application;

[0031] Figure 11 is a structural schematic diagram of the anti-blocking mechanism of the present application;

[0032] Figure 12 is a structural schematic diagram of the sliding shaft of the present application;

[0033] Figure 13 is a structural schematic diagram of the second scraping ring of the present application;

[0034] Figure 14 is a schematic diagram of the modular processing unit of the present application using container transportation.

[0035] The reference signs are explained as follows:

[0036] 1. frame;

[0037] 2. reverse osmosis membrane tube; 21. membrane shell; 22. water inlet pipe group; 23. membrane core; 24. fresh water outlet pipe; 25. concentrated water outlet pipe;

[0038] 3. water inlet pipe; 4. water production pipe; 5. concentrated water pipe; 6. maintenance platform;

[0039] 7. pre-filter assembly; 71. first filter screen; 72. second filter screen; 73. third filter screen; 74. residue discharge pipe; 75. sleeve; 76. impeller; 77. brush;

[0040] 8. rotary cutting mechanism; 81. grid; 82. blade;

[0041] 9. anti-blocking mechanism; 91. sliding shaft; 92. sliding tongue; 93. groove ring; 94. inner rod; 95. first scraping ring; 96. connecting rod; 97. second scraping ring; 98. polished rod. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0043] One embodiment of the present application is:

[0044] Please refer to Figure 1 - Figure 5The utility model provides a kind of highly integrated modularization large membrane stack device, comprising: two groups of frame 1, multiple frames 1 of same group are vertically stacked, multiple reverse osmosis membrane tubes 2 are installed in frame 1, frame 1 and its internal reverse osmosis membrane tube 2 form a modularization processing unit, reverse osmosis membrane tube 2 includes membrane shell 21, membrane core 23 is installed in membrane shell 21, one end of membrane shell 21 is connected with water inlet pipe group 22, the other end of membrane shell 21 is connected with fresh water discharge pipe 24 and concentrated water discharge pipe 25;Frame 1 selects Q235B type steel as core material, is formed by numerical control welding process, when vertically stacking, the four corners of upper and lower frames 1 are provided with positioning pin hole, accurate butt joint is carried out by positioning pin when stacking, then high-strength bolt is penetrated and locked, the overall height of frame 1 is 2.5 m, the width is 2.3 m, adapts to the loading and unloading and transport requirements of 40 feet standard container, so that single modularization processing unit can be directly transported by container, transport is convenient and efficiency is higher, multiple reverse osmosis membrane tubes 2 in each modularization processing unit are prefabricated and assembled and pressure tested in factory, only unit stacking and pipeline butt joint need to be completed on site, when a modularization processing unit fails, the modularization processing unit can be closed for individual repair, without stopping the whole system, greatly reduce the water production loss caused by maintenance of project, membrane core 23 is roll type reverse osmosis membrane element, water inlet pipe group 22 is located at the water inlet side of membrane shell 21, for water inlet, fresh water discharge pipe 24 is communicated with the central water production pipe of membrane core 23, concentrated water discharge pipe 25 is communicated with the concentrated water side of membrane shell 21, the pipe diameter is slightly larger than that of fresh water discharge pipe 24, to ensure that concentrated water is discharged quickly, avoid salt scale deposition caused by too long residence time in membrane shell 21.

[0045] It also includes water inlet pipeline 3, water production pipeline 4 and concentrated water pipeline 5, water inlet pipeline 3 is used to be connected with water inlet pipe group 22 of multiple reverse osmosis membrane tubes 2, water production pipeline 4 is used to be connected with fresh water discharge pipe 24 of multiple reverse osmosis membrane tubes 2, concentrated water pipeline 5 is used to be connected with concentrated water discharge pipe 25 of multiple reverse osmosis membrane tubes 2;Manual regulating valve and flowmeter are provided with water inlet pipeline 3 before being connected with water inlet pipe group 22, the water inlet amount of each membrane tube can be controlled individually, to ensure that the load of reverse osmosis membrane tube 2 is balanced, electromagnetic flowmeter and online conductivity meter are installed at the end of water production pipeline 4, to monitor fresh water production and water quality in real time, when conductivity exceeds the set value, alarm can be triggered, to prompt membrane core 23 replacement, concentrated water regulating valve is provided with concentrated water pipeline 5 at the end, to control recovery rate in membrane shell 21 by adjusting concentrated water discharge amount, to avoid membrane pollution acceleration caused by too high recovery rate.

[0046] Further, multiple maintenance platforms 6 are connected between two groups of frames 1, climbing ladder for boarding maintenance platform 6 is arranged on frame 1;Maintenance platform 6 is made of anti-skid pattern steel plate, can accommodate two operation and maintenance personnel simultaneously, maintenance platform 6 is rigidly connected with frame 1 through bolt, reinforcing rib plate is arranged at the connecting part, protective rail is welded around maintenance platform 6, to provide maintenance platform for operation and maintenance personnel, without additional scaffold, greatly shorten maintenance preparation time.

[0047] In addition, the reverse osmosis membrane tube 2 of the modular treatment unit is integrated with thirty-six, the water inlet pipe group 22 on the reverse osmosis membrane tube 2 is connected between the water inlet pipe 3, the fresh water discharge pipe 24 and the water production pipe 4, the concentrated water discharge pipe 25 and the concentrated water pipe 5 are connected by using a short pipe and a copy ring; the reverse osmosis membrane tube 2 is arranged in the frame 1 in a matrix mode, there are six reverse osmosis membrane tubes 2 in each row in the transverse direction, and there are six reverse osmosis membrane tubes 2 in each column in the longitudinal direction, the transverse spacing between the membrane tubes is 100mm, and the longitudinal spacing is 150mm, the spacing design can not only ensure the heat dissipation space of the membrane tube during operation, but also maximize the utilization of the internal space of the frame 1, the short pipe is made of stainless steel, the two ends of the short pipe are processed with annular grooves matched with the copy ring, the copy ring is a stainless steel shell, and a fluororubber sealing element is arranged in the shell, the sealing element adopts a C-shaped structure and has the characteristics of pressure self-sealing, taking the water inlet pipe group 22 and the water inlet pipe 3 as an example, the connection operation between the fresh water discharge pipe 24 and the water production pipe 4 and between the concentrated water discharge pipe 25 and the concentrated water pipe 5 is the same, during installation, only the two ends of the short pipe are inserted into the interfaces of the water inlet pipe group 22 and the water inlet pipe 3, then the two-piece copy ring shell is buckled, and the connection can be completed by screwing the bolt, the installation speed is significantly improved compared with the traditional flange connection, and during later maintenance, only the bolt needs to be disassembled, the installation efficiency is improved, and the difficulty of later operation and maintenance is also reduced.

[0048] On the basis of the above-mentioned embodiments, another embodiment of the present application is:

[0049] Please refer to Figure 5 - Figure 10The membrane shell 21 is provided with a pre-filter assembly 7 between the water inlet pipe group 22 and the membrane core 23, the pre-filter assembly 7 comprises a first filter screen 71, a second filter screen 72 and a third filter screen 73, the first filter screen 71, the second filter screen 72 and the third filter screen 73 are all installed on the inner wall of the membrane shell 21, the first filter screen 71 is located on the side of the second filter screen 72 close to the water inlet pipe group 22, the second filter screen 72 is located on the side of the third filter screen 73 close to the water inlet pipe group 22, the filter hole diameter on the first filter screen 71 is larger than that on the second filter screen 72, the filter hole diameter on the second filter screen 72 is larger than that on the third filter screen 73, the first filter screen 71, the second filter screen 72 and the third filter screen 73 are all conical, the first filter screen 71, the second filter screen 72 and the third filter screen 73 are used for three-layer filtering of seawater entering the membrane shell 21 from the water inlet pipe group 22 to remove larger impurities in the seawater; the first filter screen 71 is conical towards the side away from the water inlet pipe group 22, so that the impurities on the surface of the first filter screen 71 are gathered to the central part of the first filter screen 71 by the water flow of seawater flow, avoiding the accumulation of impurities on the surface of the filter hole, the second filter screen 72 and the third filter screen 73 are the same, the first filter screen 71 is used for retaining large-size impurities such as shellfish, algae and large-particle silt in seawater, the second filter screen 72 is used for retaining fine silt and colloidal particles that are not filtered by the first filter screen 71, and the third filter screen 73 is used for retaining micro colloids and fine plankton in seawater, through the three-layer filtering of the first filter screen 71, the second filter screen 72 and the third filter screen 73, the technical effect of pre-filtering seawater is achieved, the seawater after pre-filtering enters the membrane core 23, greatly reducing the filtering strength of the membrane core 23 and prolonging the service life of the membrane core 23.

[0050] In addition, the pre-filtering assembly 7 further comprises a residue discharge pipe 74 installed on the inner wall of the membrane shell 21, an outer wall of the residue discharge pipe 74 is rotatably sleeved with a sleeve pipe 75, an outer wall of the sleeve pipe 75 is connected with an impeller 76, the impeller 76 is located on the side of the first filter screen 71 close to the water inlet pipe group 22, the sleeve pipe 75 is rotatably connected with the first filter screen 71, the second filter screen 72 and the third filter screen 73, three pairs of first through grooves are formed on the sleeve pipe 75, the three pairs of first through grooves are respectively located on the side of the central part of the first filter screen 71, the second filter screen 72 and the third filter screen 73 close to the water inlet pipe group 22, three pairs of second through grooves are formed on the residue discharge pipe 74, the three first through grooves can respectively overlap with the three second through grooves when the sleeve pipe 75 rotates, the first filter screen 71, the second filter screen 72 and the third filter screen 73 can discharge the impurities deposited on the surface into the residue discharge pipe 74 when the three first through grooves overlap with the three second through grooves, the residue discharge pipe 74 is in communication with the concentrated water pipeline 5, the residue discharge pipe 74 penetrates the membrane shell 21 and is connected with the concentrated water pipeline 5 through a connecting piece; when the seawater enters from the water inlet pipe group 22, the water flow impacts the impeller 76 to generate torque, which drives the impeller 76 and the sleeve pipe 75 to rotate at a constant speed around the residue discharge pipe 74, the first through grooves and the second through grooves are rectangular, the three pairs of through grooves correspond to the central deposition areas of the first filter screen 71, the second filter screen 72 and the third filter screen 73 respectively, taking the first filter screen 71 as an example, when the sleeve pipe 75 drives the first through groove to rotate to overlap with the second through groove of the residue discharge pipe 74, the impurities accumulated in the central part of the first filter screen 71 are discharged into the residue discharge pipe 74 under the action of seawater pressure, the seawater in the residue discharge pipe 74 carries the impurities and is discharged out of the membrane shell 21 and into the concentrated water pipeline 5, the second filter screen 72 and the third filter screen 73 are the same, the setting of the residue discharge pipe 74 enables the residue discharge pipe 74 to cooperate with the sleeve pipe 75 to intermittently discharge the impurities accumulated in the central part of the first filter screen 71, the second filter screen 72 and the third filter screen 73 into the residue discharge pipe 74 and then out of the residue discharge pipe 74, thereby achieving the technical effect of automatic residue discharge, avoiding the influence of the filtration effect and the increase of seawater flow resistance caused by the accumulation of too many impurities on the surface of the first filter screen 71, the second filter screen 72 and the third filter screen 73.

[0051] It is worth noting that the sleeve pipe 75 is connected with three groups of brushes 77, the three groups of brushes 77 are respectively in contact with the first filter screen 71, the second filter screen 72 and the third filter screen 73, and the brushes 77 are arranged in an arc shape; taking the first filter screen 71 as an example, when the sleeve pipe 75 rotates with the impeller 76, the brushes 77 rotate around the surface of the first filter screen 71 synchronously, thereby dynamically cleaning the first filter screen 71, brushing away the impurities accumulated on the surface of the first filter screen 71 and preventing the impurities from being compacted to block the filter holes, at the same time, the arc-shaped brushes 77 can drive the impurities in contact therewith to move along the outer wall of the brushes 77 towards the central area of the first filter screen 71 when rotating, thereby accelerating the movement of the impurities towards the central accumulation area of the first filter screen 71 and improving the residue discharge efficiency, the second filter screen 72 and the third filter screen 73 are the same.

[0052] It is worth mentioning that the pre-filtering assembly 7 further comprises a rotary cutting mechanism 8, the rotary cutting mechanism 8 comprises a grid 81, the grid 81 is installed on the inner wall of the membrane shell 21, the grid 81 is located between the impeller 76 and the water inlet pipe set 22, the sleeve 75 is rotatably connected with the central part of the grid 81, two blades 82 are connected with the outer wall of the sleeve 75, the blades 82 are in contact with the side of the grid 81 close to the water inlet pipe set 22, the grid 81 is in a circular mesh structure, the core function of the grid 81 is to pre-intercept long strip-shaped and sheet-shaped impurities in seawater, so as to avoid that the long strip-shaped and sheet-shaped impurities are wound around the impeller 76 and block the first filter screen 71, the mesh size of the grid 81 is larger than the filter hole of the first filter screen 71, the grid 81 is only used for intercepting long strip-shaped and sheet-shaped impurities with large sizes, and the normal circulation of seawater is not affected, the two blades 82 are in a symmetrical structure, when the sleeve 75 rotates, the blades 82 rotate synchronously with the sleeve 75, the long strip-shaped and sheet-shaped impurities intercepted on the surface of the grid 81 are broken by rotary cutting, smaller impurities are formed, and then the smaller impurities enter the first filter screen 71 together with seawater for filtration, so as to avoid that the impurities are wound around the impeller 76 or block the first filter screen 71.

[0053] On the basis of the above-mentioned embodiments, another embodiment of the present application is:

[0054] Please refer to Figure 9 - Figure 13 The pre-filtering assembly 7 further comprises an anti-blocking mechanism 9, the anti-blocking mechanism 9 comprises a sliding shaft 91, the sliding shaft 91 is slidingly connected at one end of the residue discharge pipe 74 close to the first filter screen 71, one end of the sliding shaft 91 is located in the residue discharge pipe 74, the other end of the sliding shaft 91 is located in the sleeve 75, the outer wall of the sliding shaft 91 is provided with a convex rib, the connecting part of the residue discharge pipe 74 and the sliding shaft 91 is provided with a groove, the convex rib of the sliding shaft 91 is slidingly connected with the groove, so that the sliding shaft 91 can only move horizontally and cannot rotate, the sliding shaft 91 is connected with a sliding tongue 92, the inner wall of the sleeve 75 is connected with a groove ring 93, the groove ring 93 is provided with an annular inclined groove, the sliding tongue 92 is slidingly connected with the annular inclined groove, when the groove ring 93 rotates, the groove ring 93 can drive the sliding tongue 92 and the sliding shaft 91 to move horizontally and reciprocally through the annular inclined groove, one end of the sliding shaft 91 located in the residue discharge pipe 74 is connected with an inner rod 94, the outer wall of the inner rod 94 is connected with a plurality of first scraping rings 95, the plurality of first scraping rings 95 are slidingly connected with the inner wall of the residue discharge pipe 74; when the groove ring 93 rotates, the annular inclined groove of the groove ring 93 converts the rotary motion into the horizontal reciprocating motion of the sliding shaft 91 through the sliding tongue 92, the sliding shaft 91 drives the inner rod 94 to move horizontally and reciprocally synchronously when the sliding shaft 91 moves horizontally and reciprocally, the outer side of the first scraping ring 95 is provided with an annular scraping edge, when the sliding shaft 91 drives the inner rod 94 to move horizontally and reciprocally, the first scraping ring 95 slides tightly against the inner wall of the residue discharge pipe 74, so as to scrape off the impurities attached to the inner wall of the residue discharge pipe 74, and avoid that the impurities are deposited on the inner wall of the residue discharge pipe 74 to cause blockage.

[0055] It is worth mentioning that the slagging-off pipe 74 is provided with a bend, a second scraping ring 97 is slidably connected in the bend of the slagging-off pipe 74, a polished rod 98 is connected to the inner side of the second scraping ring 97, a connecting rod 96 is rotatably connected to the polished rod 98, and the end of the connecting rod 96 away from the polished rod 98 is hingedly connected to the inner rod 94; the bend of the slagging-off pipe 74 is a right angle, and the outer side of the second scraping ring 97 is provided with an annular scraping blade, when the inner rod 94 moves horizontally, the connecting rod 96 pushes the polished rod 98 to drive the second scraping ring 97 to slide along the inner wall of the bend of the slagging-off pipe 74, thereby scraping off the impurities accumulated at the bend, avoiding the internal blockage of the bend of the slagging-off pipe 74.

[0056] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A highly integrated, modular, large-scale membrane stack device, characterized in that, include: Two sets of frames (1), multiple frames (1) of the same set are stacked vertically, multiple reverse osmosis membrane tubes (2) are installed in the frame (1), the frame (1) and the reverse osmosis membrane tubes (2) inside form a modular processing unit, the reverse osmosis membrane tube (2) includes a membrane shell (21), a membrane core (23) is installed in the membrane shell (21), one end of the membrane shell (21) is connected to an inlet water pipe group (22), and the other end of the membrane shell (21) is connected to a fresh water outlet pipe (24) and a concentrated water outlet pipe (25). It also includes an inlet water pipe (3), a product water pipe (4), and a concentrate water pipe (5). The inlet water pipe (3) is used to connect to the inlet water pipe group (22) of multiple reverse osmosis membrane tubes (2). The product water pipe (4) is used to connect to the fresh water outlet pipe (24) of multiple reverse osmosis membrane tubes (2). The concentrate water pipe (5) is used to connect to the concentrate outlet pipe (25) of multiple reverse osmosis membrane tubes (2). The membrane housing (21) is provided with a pre-filtration component (7), which is located between the water inlet pipe group (22) and the membrane core (23). The pre-filtration component (7) includes a first filter screen (71), a second filter screen (72) and a third filter screen (73), which are all installed on the inner wall of the membrane housing (21). The first filter screen (71) is located on the side of the second filter screen (72) close to the inlet pipe assembly (22), and the second filter screen (72) is located on the side of the third filter screen (73) close to the inlet pipe assembly (22). The pore size of the first filter screen (71) is larger than that of the second filter screen (72), and the pore size of the second filter screen (72) is larger than that of the third filter screen (73). The first filter screen (71), the second filter screen (72) and the third filter screen (73) are all tapered. The first filter screen (71), the second filter screen (72) and the third filter screen (73) are used to perform three-layer filtration on the seawater entering the membrane shell (21) from the inlet pipe assembly (22) to remove larger impurities in the seawater. The pre-filtration assembly (7) further includes a slag discharge pipe (74), which is installed on the inner wall of the membrane housing (21). A sleeve (75) is rotatably sleeved on the outer wall of the slag discharge pipe (74). An impeller (76) is connected to the outer wall of the sleeve (75). The impeller (76) is located on the side of the first filter screen (71) near the inlet pipe assembly (22). The sleeve (75) is rotatably connected to the first filter screen (71), the second filter screen (72), and the third filter screen (73). Three pairs of first through slots are provided on the sleeve (75). Located on the side of the inlet pipe assembly (22) at the center of the first filter screen (71), the second filter screen (72) and the third filter screen (73) respectively, the slag discharge pipe (74) is provided with three pairs of second through grooves. When the three first through grooves rotate with the sleeve (75), they can overlap with the three second through grooves respectively. When the first filter screen (71), the second filter screen (72) and the third filter screen (73) overlap with the three second through grooves, the surface deposited impurities can be discharged into the slag discharge pipe (74). The slag discharge pipe (74) is connected to the concentrate pipeline (5). The pre-filtration assembly (7) also includes a rotary cutting mechanism (8), which includes a grid (81) installed on the inner wall of the membrane housing (21). The grid (81) is located between the impeller (76) and the inlet pipe assembly (22). The sleeve (75) is rotatably connected to the center of the grid (81). Two blades (82) are connected to the outer wall of the sleeve (75). The blades (82) contact the side of the grid (81) near the inlet pipe assembly (22).

2. The highly integrated modular large-scale membrane stack device according to claim 1, characterized in that: Multiple maintenance platforms (6) are connected between the two sets of frames (1), and ladders for climbing onto the maintenance platforms (6) are provided on the frames (1).

3. The highly integrated modular large-scale membrane stack device according to claim 1, characterized in that: The maximum number of reverse osmosis membrane tubes (2) integrated in the modular processing unit is thirty-six. The inlet water pipe group (22) and the inlet water pipe (3), the fresh water outlet pipe (24) and the product water pipe (4), and the concentrate outlet pipe (25) and the concentrate pipe (5) on the reverse osmosis membrane tube (2) are all connected by short pipes and copy lines.

4. The highly integrated modular large-scale membrane stack device according to claim 1, characterized in that: Three sets of brushes (77) are connected to the sleeve (75). The three sets of brushes (77) are in contact with the first filter screen (71), the second filter screen (72) and the third filter screen (73) respectively. The brushes (77) are arranged in an arc shape.

5. The highly integrated modular large-scale membrane stack device according to claim 1, characterized in that: The pre-filtration assembly (7) also includes an anti-clogging mechanism (9), which includes a sliding shaft (91). The sliding shaft (91) is slidably connected to one end of the slag discharge pipe (74) near the first filter screen (71). A sliding tongue (92) is connected to the sliding shaft (91). A grooved ring (93) is connected to the inner wall of the sleeve (75). An annular inclined groove is provided on the grooved ring (93). The sliding tongue (92) is slidably connected to the annular inclined groove. When the grooved ring (93) rotates, it can drive the sliding tongue (92) and the sliding shaft (91) to move horizontally back and forth through the annular inclined groove. An inner rod (94) is connected to one end of the sliding shaft (91) inside the slag discharge pipe (74). A plurality of first scraper rings (95) are connected to the outer wall of the inner rod (94). The plurality of first scraper rings (95) are slidably connected to the inner wall of the slag discharge pipe (74).

6. The highly integrated modular large-scale membrane stack device according to claim 5, characterized in that: The slag discharge pipe (74) is provided with a bend, and a second scraper ring (97) is slidably connected inside the bend of the slag discharge pipe (74). A smooth rod (98) is connected to the inner side of the second scraper ring (97), and a connecting rod (96) is rotatably connected to the smooth rod (98). The end of the connecting rod (96) away from the smooth rod (98) is hinged to the inner rod (94).

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