Membrane reactor separation device and heavy metal wastewater treatment system
By using hollow fiber membranes and adsorbent materials in the membrane reactor separation device, the problem of low permeability flux of the separation membrane is solved, and efficient separation of heavy metal wastewater is achieved, ensuring high permeability flux and high separation efficiency.
Patent Information
- Application Number
- CN202420867182.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-24
AI Technical Summary
In the prior art, the separation membrane is limited by the Trade-off effect between permeability and selectivity, resulting in a low permeability flux, which cannot ensure high permeability flux while ensuring high separation efficiency.
A membrane reactor separation device is adopted, which includes a shell and a plurality of hollow fiber membranes. Adsorption materials are provided between the inner and outer walls of the hollow fiber membrane. During the process of heavy metal wastewater permeating through the hollow fiber membrane structure, heavy metal ions are adsorbed by the adsorbed material to achieve efficient separation.
While ensuring high permeability flux, the separation efficiency is improved and the high-throughput and high-efficiency treatment of heavy metal contaminated wastewater is achieved.
Smart Images
Figure CN222593565U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heavy metal wastewater treatment, in particular to a membrane reactor separation device and a heavy metal wastewater treatment system. Background Art
[0002] In recent years, with the rapid development of the economy and society, a large amount of wastewater containing heavy metals generated in industrial production has seriously polluted the water environment. This heavy metal pollution not only has a negative impact on the growth and development of plants, but also directly threatens the life and health of animals and humans. Therefore, it is urgent to use advanced scientific methods to efficiently treat heavy metal wastewater.
[0003] Among the numerous heavy metal wastewater treatment technologies, adsorption technology has attracted much attention as a method of transporting a substance from the liquid phase to the surface of the solid phase (adsorbent material) and removing heavy metal ions from water through a combination of physical or chemical effects. However, due to their high specific surface area and high surface activity, adsorbent materials are usually in powder form, difficult to recycle and have a high usage amount, which limits their widespread application in the field of water treatment. Membrane separation technology has also attracted much attention due to its advantages such as high removal efficiency, simple operation, easy recovery of separation products, and coupling with other treatment technologies. However, separation membranes are limited by the trade-off effect between permeability and selectivity, resulting in low permeate flux. Therefore, how to increase the permeate flux while maintaining the high separation efficiency of the separation membrane has become a problem that needs to be solved urgently. Utility Model Content
[0004] The purpose of the utility model is to solve the problem in the prior art that the separation membrane is limited by the trade-off effect between permeability and selectivity, resulting in a low permeation flux, and thus unable to ensure high permeation flux while ensuring high separation efficiency. A membrane reactor separation device and a heavy metal wastewater treatment system are provided. The membrane reactor separation device can improve the separation efficiency while ensuring high permeation flux, and can efficiently treat heavy metal wastewater.
[0005] In order to achieve the above-mentioned object, the utility model provides a membrane reactor separation device on the one hand, including a membrane separation component, the membrane separation component including a shell and a plurality of hollow fiber membranes, the interior of the shell forms a shell-side space, the two ends of the plurality of hollow fiber membranes are respectively fixed to the top and the bottom of the shell-side space, the outside of the shell is provided with a feed port connected to the shell-side space, and the bottom of the shell is provided with a first outlet for discharging treated wastewater;
[0006] An adsorption material is provided inside the membrane between the inner wall and the outer wall of the hollow fiber membrane for adsorbing heavy metal ions, and the hollow cavity of the hollow fiber membrane is communicated with the first outlet.
[0007] In some embodiments, an upper mounting platform is provided at the top of the shell-side space, and a lower mounting platform is provided at the bottom of the shell-side space. A plurality of upper grooves and lower grooves for axially fixing the hollow fiber membrane are respectively provided on the upper mounting platform and the lower mounting platform, and the plurality of upper grooves and the plurality of lower grooves correspond to each other one by one.
[0008] In some embodiments, a through hole is provided at the center of the bottom of the lower groove, and the through hole is connected to the first outlet.
[0009] In some embodiments, the through hole is connected to a water pipe, and the water pipe is in communication with the first outlet.
[0010] In some embodiments, the shell is further provided with a second outlet connected to the shell-side space, and the second outlet is used to discharge untreated wastewater.
[0011] The second aspect of the utility model provides a heavy metal wastewater treatment system, comprising a heavy metal wastewater pool and a collection pool, the heavy metal wastewater treatment system also comprising the above-mentioned membrane reactor separation device;
[0012] A feed pipe is provided between the outlet of the heavy metal wastewater pool and the feed port, and a discharge pipe is provided between the second outlet and the inlet of the heavy metal wastewater pool.
[0013] In some embodiments, a pressure pump is provided on the feed pipe to drive the wastewater in the feed pipe.
[0014] In some embodiments, a first pressure controller is provided on the pipeline connecting the pressure pump and the feed port; and / or a second pressure controller is provided on the discharge pipeline.
[0015] In some embodiments, a first flow controller is provided on the pipeline connecting the pressure pump and the feed port; and / or a second flow controller is provided on the discharge pipeline.
[0016] In some embodiments, a first valve is disposed on the feed pipeline, and the first valve is disposed at a position close to the outlet of the heavy metal wastewater pool; and / or
[0017] The discharge pipe is provided with a second valve, and the second valve is arranged at a position close to the inlet of the heavy metal wastewater pool.
[0018] Through the above technical scheme, the utility model increases the contact area between heavy metal wastewater and the hollow fiber membrane by setting a membrane separation component and adopting a hollow fiber membrane, thereby ensuring a higher permeation flux. According to the composition of the heavy metal wastewater, an adsorbent material is arranged inside the hollow fiber membrane. In the process of the heavy metal wastewater permeating through the hollow fiber membrane structure, the heavy metal ions are adsorbed by the adsorbent material, thereby achieving a higher separation efficiency. The utility model combines the high permeation flux of membrane separation with the high separation efficiency of the adsorbent material, thereby achieving high-flux and high-efficiency treatment of heavy metal contaminated wastewater. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the principle of a heavy metal wastewater treatment system provided by the utility model;
[0020] Figure 2 This is a schematic diagram of the structure of a membrane reactor separation device provided by the utility model;
[0021] Figure 3 This is a schematic diagram of the upper mounting platform in the utility model when viewed from above;
[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the hollow fiber membrane in the utility model;
[0023] Figure 5 It is a schematic diagram of the top view of the lower mounting platform in the utility model;
[0024] Figure 6 It is a schematic diagram of the internal front view structure of the lower mounting platform in the utility model.
[0025] Description of Reference Numerals
[0026] 1. Heavy metal wastewater pool; 21. Feed pipe; 22. Discharge pipe; 31. First valve; 32. Second valve; 4. Pressure pump; 51. First pressure controller; 52. Second pressure controller; 61. First flow controller; 62. Second flow controller; 7. Membrane separation component; 71. Feed inlet; 72. Shell; 73. Shell space; 74. Hollow fiber membrane; 741. Inside of membrane body; 742. Hollow cavity; 75. Upper mounting platform; 751. Upper groove; 76. Lower mounting platform; 761. Lower groove; 762. Through hole; 763. Water guide pipe; 77. First outlet; 78. Second outlet; 8. Collection tank. DETAILED DESCRIPTION
[0027] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0028] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper" and "lower" and the like indicate positions or positional relationships only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0029] In addition, the words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.
[0030] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.
[0031] Combination Figure 2 and Figure 4 As shown, the first aspect of the utility model provides a membrane reactor separation device, including a membrane separation component 7, wherein the membrane separation component 7 includes a shell 72 and a plurality of hollow fiber membranes 74, wherein the interior of the shell 72 forms a shell-side space 73, and the two ends of the plurality of hollow fiber membranes 74 are respectively fixed to the top and the bottom of the shell-side space 73, and the exterior of the shell 72 is provided with a feed inlet 71 connected to the shell-side space 73, and the bottom of the shell 72 is provided with a first outlet 77 for discharging treated wastewater; wherein an adsorption material is provided inside the membrane body 741 between the inner wall and the outer wall of the hollow fiber membrane 74 for adsorbing heavy metal ions, and the hollow cavity 742 of the hollow fiber membrane 74 is connected to the first outlet 77, and it can be understood that the adsorption material provided inside the membrane body 741 can be arranged in any appropriate manner.
[0032] The hollow fiber membrane 74 in the utility model has a hollow cavity 742, an inner wall and an outer wall, and the inner wall and the outer wall of the membrane body 741 are porous structures. The inventive concept of the utility model adjusts the porosity of the hollow fiber membrane 74 according to the composition of the heavy metal wastewater, and loads the adsorbent material that can adsorb heavy metal ions on the surface and internal pore structure of the hollow fiber membrane 74 through reaction. In the process of heavy metal wastewater permeating through the hollow fiber membrane 74, the heavy metal ions are adsorbed by the adsorbent material, thereby achieving a higher separation efficiency. The utility model combines the high permeation flux of membrane separation with the high separation efficiency of the adsorbent material by making full use of the characteristics of the hollow fiber membrane and the function of the adsorbent material, thereby achieving high-throughput and high-efficiency treatment of heavy metal-contaminated wastewater.
[0033] Specifically, the heavy metal wastewater enters the shell space provided with multiple hollow fiber membranes 74 from the feed port 71, and is transported from the outer wall of the hollow fiber membrane 74 to the interior thereof under pressure. When passing through the porous area of the membrane body 741, the heavy metal ions are adsorbed by the adsorption material. The wastewater with heavy metals removed passes through the membrane body 741 and the inner wall into the hollow cavity 742 connected to the first outlet 77, and is discharged from the first outlet 77.
[0034] In the present utility model, combined with Figure 2 , Figure 3 as well as Figure 5 As shown, an upper mounting platform 75 is provided at the top of the shell space 73, and a lower mounting platform 76 is provided at the bottom of the shell space 73. A plurality of upper grooves 751 and a lower groove 761 for axially fixing the hollow fiber membrane 74 are respectively provided on the upper mounting platform 75 and the lower mounting platform 76, and the plurality of upper grooves 751 and the plurality of lower grooves 761 correspond to each other. In specific implementation, the two ends of the hollow fiber membrane 74 are respectively connected to the upper groove 751 and the lower groove 761 corresponding to each other, and the hollow fiber membrane 74 can be sealed and fixed in the middle of the upper and lower mounting platforms by using sealing materials such as resin, and kept vertical to the upper and lower mounting platforms. Vertical installation can maximize the use of the filtration area of the hollow fiber membrane 74 and improve the treatment efficiency of heavy metal wastewater.
[0035] Furthermore, if Figure 5 As shown, a through hole 762 is provided at the center of the bottom of the lower groove 761 , and the through hole 762 is connected to the first outlet 77 . It can be understood that the filtered wastewater entering the hollow cavity of the hollow fiber membrane 74 can be discharged from the first outlet 77 through the through hole 762 .
[0036] Furthermore, if Figure 6 As shown, the through hole 762 is connected to a water guide pipe 763, and the water guide pipe 763 is in communication with the first outlet 77. The water guide pipe 763 guides and concentrates the flow direction of the treated wastewater, thereby improving the discharge efficiency of the treated wastewater.
[0037] In the present invention, the shell 72 is also provided with a second outlet 78 connected to the shell space 73, and the second outlet 78 is used to discharge untreated wastewater. This cross-flow design discharges untreated wastewater from the second outlet 78, and the treated wastewater is discharged from the first outlet 77. The load of the membrane reactor separation device to treat wastewater can be reduced.
[0038] like Figure 1 As shown, the second aspect of the utility model provides a heavy metal wastewater treatment system, including a heavy metal wastewater pool 1 and a collection pool 8, and the heavy metal wastewater treatment system also includes the above-mentioned membrane reactor separation device; a feed pipe 21 is provided between the outlet of the heavy metal wastewater pool 1 and the feed port 71, and a discharge pipe 22 is provided between the second outlet 78 and the inlet of the heavy metal wastewater pool 1.
[0039] Preferably, a pressure pump 4 is provided on the feed pipe 21 to drive the wastewater in the feed pipe 21. It is understandable that when the wastewater in the heavy metal wastewater pool 1 needs to be transported to a distant membrane reactor separation device or collection pool 8, the pressure pump can provide sufficient power to ensure that the wastewater can be smoothly transported to the designated location without being limited by the length and height of the feed pipe 21.
[0040] More preferably, a first pressure controller 51 is provided on the pipe connecting the pressure pump 4 and the feed port 71; and / or a second pressure controller 52 is provided on the discharge pipe 22, which helps to monitor and adjust the system pressure in real time, detect problems in time, and optimize system operation, thereby ensuring system safety, preventing wastewater leakage and environmental pollution; a first flow controller 61 is provided on the pipe connecting the pressure pump 4 and the feed port 71; and / or a second flow controller 62 is provided on the discharge pipe 22. By monitoring the readings of the flow controllers, the operator can accurately control the flow rate of wastewater in the pipe to ensure that the wastewater in the treatment system flows at an appropriate rate to optimize the operating efficiency and performance of the system.
[0041] In the present invention, a first valve 31 is provided on the feed pipe 21, and the first valve 31 is provided at a position close to the outlet of the heavy metal wastewater pool 1; and / or a second valve 32 is provided on the discharge pipe 22, and the second valve 32 is provided at a position close to the inlet of the heavy metal wastewater pool 1. By adjusting the first valve 31 and the second valve 32, the operator can flexibly control the inflow and outflow of wastewater according to actual needs. This helps to cope with different treatment requirements and process parameters, making the system operation more flexible and efficient.
[0042] In combination with the above embodiments, it can be known that the specific technical scheme of the heavy metal wastewater treatment system is that the heavy metal wastewater flows from the heavy metal wastewater pool 1 into the feed pipe 21 under the drive of the pressure pump 4, and after the pressure and flow rate of the heavy metal wastewater in the feed pipe 21 are adjusted by the first pressure controller 51 and the first flow controller 61 respectively, the heavy metal wastewater flows into the shell side space 73 from the feed port 71 of the membrane separation component 7, and the heavy metal wastewater is transported from the outer wall of the hollow fiber membrane 74 to the inside under the pressure drive, and passes through the membrane body 74. 1 porous area, heavy metal ions are adsorbed by the adsorption material, and the wastewater with heavy metals removed enters the hollow cavity 742 through the holes and inner wall of the membrane body 741, and then enters the water guide pipe 763 inside the lower mounting platform 76 through the through hole 762 in the middle of the bottom of the lower groove 761 connected to the hollow cavity 742, and is collected through the first outlet 77 to be exported to the collection tank 8. The other part of the untreated wastewater flows out through the second outlet 78 and returns to the heavy metal wastewater tank 1 through the discharge pipe 22, thereby cyclically and efficiently treating the heavy metal-contaminated wastewater.
Claims
1. A membrane reactor separation device, characterized in that: The membrane separation component (7) comprises a shell (72) and a plurality of hollow fiber membranes (74); a shell-side space (73) is formed inside the shell (72); two ends of the plurality of hollow fiber membranes (74) are respectively fixed to the top and the bottom of the shell-side space (73); a feed inlet (71) communicating with the shell-side space (73) is arranged outside the shell (72); and a first outlet (77) for discharging treated wastewater is arranged at the bottom of the shell (72); An adsorption material for adsorbing heavy metal ions is provided inside the membrane body (741) between the inner wall and the outer wall of the hollow fiber membrane (74), and the hollow cavity (742) of the hollow fiber membrane (74) is connected to the first outlet (77).
2. The membrane reactor separation device according to claim 1, characterized in that: An upper mounting platform (75) is arranged at the top of the shell-side space (73), and a lower mounting platform (76) is arranged at the bottom of the shell-side space (73). A plurality of upper grooves (751) and a plurality of lower grooves (761) for axially fixing the hollow fiber membrane (74) are respectively arranged on the upper mounting platform (75) and the lower mounting platform (76), and the plurality of upper grooves (751) and the plurality of lower grooves (761) correspond to each other one by one.
3. The membrane reactor separation device according to claim 2, characterized in that: A through hole (762) is provided at the center of the bottom of the lower groove (761), and the through hole (762) is connected to the first outlet (77).
4. The membrane reactor separation device according to claim 3, characterized in that: The through hole (762) is connected to a water conduit (763), and the water conduit (763) is in communication with the first outlet (77).
5. The membrane reactor separation device according to claim 1, characterized in that: The shell (72) is also provided with a second outlet (78) communicating with the shell-side space (73), and the second outlet (78) is used to discharge untreated wastewater.
6. A heavy metal wastewater treatment system, comprising a heavy metal wastewater pool (1) and a collection pool (8), characterized in that: The heavy metal wastewater treatment system further comprises the membrane reactor separation device according to claim 5; A feed pipe (21) is provided between the outlet of the heavy metal wastewater pool (1) and the feed port (71), and a discharge pipe (22) is provided between the second outlet (78) and the inlet of the heavy metal wastewater pool (1).
7. The heavy metal wastewater treatment system according to claim 6, characterized in that: The feed pipe (21) is provided with a pressure pump (4) for driving the waste water in the feed pipe (21).
8. The heavy metal wastewater treatment system according to claim 7, characterized in that: A first pressure controller (51) is provided on the pipeline connecting the pressure pump (4) and the feed port (71); and / or a second pressure controller (52) is provided on the discharge pipeline (22).
9. The heavy metal wastewater treatment system according to claim 7, characterized in that: A first flow controller (61) is provided on the pipeline connecting the pressure pump (4) and the feed port (71); and / or a second flow controller (62) is provided on the discharge pipeline (22).
10. The heavy metal wastewater treatment system according to claim 6, characterized in that: The feed pipe (21) is provided with a first valve (31), and the first valve (31) is arranged at a position close to the outlet of the heavy metal wastewater pool (1); and / or The discharge pipe (22) is provided with a second valve (32), and the second valve (32) is arranged at a position close to the inlet of the heavy metal wastewater pool (1).