Membrane filtration system
The segmented membrane filtration system solves the problems of high cost and easy contamination of existing membrane separation equipment, and achieves efficient purification and low-cost production of fermentation broth.
Patent Information
- Application Number
- CN202423253318.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-28
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-28
AI Technical Summary
Existing membrane separation equipment has high investment costs, strict requirements for feed liquid pretreatment, and is prone to membrane fouling, which affects product quality and increases production costs.
The segmented membrane filtration system includes components such as ceramic membrane nanofiltration, nanofiltration membrane pre-tank, operating nanofiltration unit, and washing nanofiltration tank. Through staged filtration and cleaning, it achieves continuous purification of fermentation broth.
It improves the purification efficiency of fermentation broth, reduces production costs, decreases the frequency of equipment cleaning, and improves product quality and production efficiency.
Smart Images
Figure CN223697372U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of separation device technology, and specifically relates to a membrane filtration system. Background Technology
[0002] In the extraction of fermentation products from fermentation broth, methods such as evaporation concentration, membrane concentration, freeze concentration, and adsorption concentration are commonly used. Evaporation concentration requires high energy to drive the process, and the equipment used is expensive, increasing operating costs. The evaporation efficiency is also greatly affected by the properties of the material, potentially impacting product quality. Freeze concentration cannot inhibit the activity of microorganisms and enzymes when processing fermentation broth, and the ice crystals after freezing can carry a large amount of product, affecting product quality. Adsorption concentration is suitable for applications requiring high purity, but its concentration efficiency is low and its cost is high. Membrane concentration, which uses a semi-permeable membrane to allow solvent passage while retaining solute, is suitable for heat-sensitive substances.
[0003] The investment cost of membrane separation technology and equipment currently in use is relatively high, and the requirements for feed pretreatment are also high. Furthermore, because membranes are highly sensitive to impurities and particulate matter, strict pretreatment of the feed is necessary; otherwise, it will lead to membrane fouling and increase production costs. Utility Model Content
[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a membrane filtration system that can achieve continuous purification of fermentation broth to obtain high-quality products by segmenting the fermentation broth, and the production equipment is easy to clean.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] The membrane filtration system of this utility model includes a fermentation broth tank, a ceramic membrane nanofilter connected to the fermentation broth tank, a nanofiltration membrane pre-tank connected to the ceramic membrane nanofilter, a running nanofilter group connected to the nanofiltration membrane pre-tank, a washing nanofilter tank connected to the running nanofilter group, a washing nanofilter group connected to the washing nanofilter group, a first concentration tank and a second concentration tank connected to the first concentration tank, a primary concentration group and a secondary concentration group connected to the first concentration tank in sequence, a tertiary concentration group and a quaternary concentration group connected to the second concentration tank in sequence, the running nanofilter group connected to the first concentration tank, the secondary concentration group connected to the second concentration tank, and recovery tanks connected to the primary, secondary, tertiary, and quaternary concentration groups, with the quaternary concentration group connected to the nanofiltration membrane pre-tank; product tanks are connected to both the running nanofilter group and the washing nanofilter group.
[0007] in:
[0008] The number of nanofiltration membrane pre-tanks is 1-2, the number of operating nanofiltration unit groups is 3, and the operating nanofiltration unit group is equipped with several nanofiltration units.
[0009] The number of the washing residue nanofiltration tanks is 1-3, and the washing residue nanofiltration unit is equipped with several nanofiltration units.
[0010] Each of the primary, secondary, tertiary, and quaternary concentration groups is equipped with several nanofiltration units.
[0011] The bottom of the nanofiltration membrane front tank is connected to heat exchanger one, and heat exchanger two is installed at the inlet of the operating nanofiltration unit.
[0012] The fermentation broth tank is equipped with a sewage discharge pipe 1 at the bottom, the nanofiltration membrane pre-tank is connected to a sewage discharge pipe 2 at the bottom, the slag washing nanofiltration tank is connected to a sewage discharge pipe 3 at the bottom, the first concentration tank is connected to a sewage discharge pipe 4 at the bottom, and the second concentration tank is connected to a sewage discharge pipe 5 at the bottom.
[0013] The ceramic membrane nanofiltration unit, the operating nanofiltration unit, the sludge washing nanofiltration unit, the primary concentration unit, the secondary concentration unit, the tertiary concentration unit, and the quaternary concentration unit are all connected to pure water pipelines.
[0014] The washing residue nanofiltration unit is provided with a light phase outlet at the top, which is connected to the second concentration tank. The washing residue nanofiltration unit is provided with a heavy phase outlet on the side, which is connected to the first concentration tank.
[0015] The four-stage concentration group is equipped with a concentration outlet at the top, and the concentration outlet is equipped with a discharge pipe, which is connected to the nanofiltration membrane front tank.
[0016] The fermentation tank is equipped with a feed pipe at the top.
[0017] The beneficial effects of this utility model are:
[0018] This invention purifies fermentation broth using a membrane filtration system, systematically treating the broth to effectively remove impurities. Grouping the filtration system maximizes the retention of fermentation products, improving product quality. The ceramic membrane nanofiltration unit filters out larger impurities, increasing nanofiltration efficiency. Subsequent washing and nanofiltration after nanofiltration yields a higher purity fermentation broth, facilitating a more refined concentration process. Segmented concentration reduces the time fermentation substrate remains in the concentration unit, preventing excessive substrate from affecting product discharge. After filtration, each stage of the membrane filtration system can be cleaned separately, preventing impurities from contaminating the system, reducing replacement frequency, lowering production costs, and increasing production efficiency. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] In the diagram: 1. Fermentation broth tank; 2. Ceramic membrane nanofiltration unit; 3. Nanofiltration membrane pre-tank; 4. Operating nanofiltration unit; 5. Residue washing nanofiltration tank; 6. Residue washing nanofiltration unit; 7. First concentration tank; 8. Second concentration tank; 9. Primary concentration group; 10. Secondary concentration group; 11. Tertiary concentration group; 12. Quaternary concentration group; 13. Recovery tank; 14. Product tank;
[0021] 101. Drainage pipe 1; 102. Feed pipe; 301. Heat exchanger 1; 302. Drainage pipe 2; 401. Heat exchanger 2; 501. Drainage pipe 3; 701. Drainage pipe 4; 801. Drainage pipe 5; 1201. Discharge pipe. Detailed Implementation
[0022] The embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0023] Example 1
[0024] like Figure 1 As shown, the membrane filtration system of this utility model includes a fermentation broth tank 1, a ceramic membrane nanofilter 2 connected to the fermentation broth tank 1, a nanofiltration membrane pre-tank 3 connected to the ceramic membrane nanofilter 2, a running nanofilter group 4 connected to the nanofiltration membrane pre-tank 3, a washing nanofilter tank 5 connected to the running nanofilter group 4, a washing nanofilter group 6 connected to the washing nanofilter group 6, a first concentration tank 7 and a second concentration tank 8 connected to the first concentration tank 7, a first-stage concentration group 9 and a second-stage concentration group 10 connected to the first concentration tank 7, a third-stage concentration group 11 and a fourth-stage concentration group 12 connected to the second concentration tank 8, the running nanofilter group 4 connected to the first concentration tank 7, the second-stage concentration group 10 connected to the second concentration tank 8, and recovery tanks 13 connected to the first-stage concentration group 9, the second-stage concentration group 10, the third-stage concentration group 11 and the fourth-stage concentration group 12, and the fourth-stage concentration group 12 connected to the nanofiltration membrane pre-tank 3; product tanks 14 are connected to both the running nanofilter group 4 and the washing nanofilter group 6.
[0025] There are 1-2 nanofiltration membrane pre-tanks 3 and 3 operating nanofiltration unit groups 4, which contain several nanofiltration units.
[0026] There are 1-3 nanofiltration tanks 5 for washing residue, and several nanofiltration units are installed in the nanofiltration unit group 6 for washing residue.
[0027] Several nanofiltration units are installed in the primary concentration group 9, the secondary concentration group 10, the tertiary concentration group 11, and the quaternary concentration group 12.
[0028] Heat exchanger 301 is connected to the bottom of the nanofiltration membrane front tank 3, and heat exchanger 401 is installed at the inlet of the operating nanofiltration unit 4.
[0029] The fermentation broth tank 1 is equipped with a sewage discharge pipe 101 at the bottom, the nanofiltration membrane pre-tank 3 is connected to a sewage discharge pipe 2 302 at the bottom, the sludge washing nanofiltration tank 5 is connected to a sewage discharge pipe 3 501 at the bottom, the first concentration tank 7 is connected to a sewage discharge pipe 4 701 at the bottom, and the second concentration tank 8 is connected to a sewage discharge pipe 5 801 at the bottom.
[0030] The ceramic membrane nanofiltration unit 2, the operating nanofiltration unit 4, the sludge washing nanofiltration unit 6, the primary concentration unit 9, the secondary concentration unit 10, the tertiary concentration unit 11, and the quaternary concentration unit 12 are all connected to pure water pipelines.
[0031] The washing residue nanofiltration unit 6 is provided with a light phase outlet at the top, which is connected to the second concentration tank 8. The washing residue nanofiltration unit 6 is provided with a heavy phase outlet on the side, which is connected to the first concentration tank 7.
[0032] The fourth-stage concentration group 12 is equipped with a concentration outlet at the top, and the concentration outlet is equipped with a discharge pipe 1201. The concentration outlet is connected to the nanofiltration membrane front tank 3.
[0033] The fermentation tank 1 is equipped with a feed pipe 102 at the top.
[0034] Working principle and process:
[0035] During the purification of the fermentation broth, macromolecular impurities and solid particles are first separated by a ceramic membrane nanofiltration unit 2, and then the broth is transported to a nanofiltration membrane pre-tank 3 for storage. When the liquid in the nanofiltration membrane pre-tank 3 reaches a certain volume, it is then transported to the operating nanofiltration unit 4 for nanofiltration. The clear phase is discharged into the product tank 14, and the heavy phase enters the residue washing nanofiltration tank 5 for storage. When the liquid in the residue washing nanofiltration tank 5 reaches a certain volume, it is then transported to the residue washing nanofiltration unit 6 for residue washing nanofiltration. The high-concentration clear phase is discharged into the product tank 14, the medium-concentration clear phase is discharged into the first concentration tank 7, and the low-concentration clear phase is discharged into the second concentration tank 8. The first-stage concentration group 9 and the second-stage concentration group 9 are then used for further purification. The clear phase separated in concentration group 10 enters the second concentration tank 8, and the heavy phase enters the recovery tank 13. The clear phase separated in the third-stage concentration group 11 and the fourth-stage concentration group 12 is discharged through the discharge pipe 1201, and the heavy phase enters the recovery tank 13. After filtration, the reaction device is washed, and then the remaining impurities are discharged through the sewage pipes 1-101, 3-302, 501, 501, and 801. The first-stage concentration group 9 and the second-stage concentration group 10 are cleaned separately, and the third-stage concentration group 11 and the fourth-stage concentration group 12 are cleaned separately.
Claims
1. A membrane filtration system, comprising a fermentation broth tank (1), characterized in that, The fermentation broth tank (1) is connected to a ceramic membrane nanofiltration unit (2), the ceramic membrane nanofiltration unit (2) is connected to a nanofiltration membrane pre-tank (3), the nanofiltration membrane pre-tank (3) is connected to a running nanofiltration unit (4), the running nanofiltration unit (4) is connected to a sludge washing nanofiltration tank (5), the sludge washing nanofiltration tank (5) is connected to a sludge washing nanofiltration unit (6), the sludge washing nanofiltration unit (6) is connected to a first concentration tank (7) and a second concentration tank (8), and the first concentration tank (7) is sequentially connected to a primary concentration group (9) and a secondary concentration group (10). The second concentration tank (8) is connected in sequence to the third-stage concentration group (11) and the fourth-stage concentration group (12). The operating nanofiltration group (4) is connected to the first concentration tank (7). The second-stage concentration group (10) is connected to the second concentration tank (8). The first-stage concentration group (9), the second-stage concentration group (10) and the third-stage concentration group (11) are all connected to the recovery tank (13). The fourth-stage concentration group (12) is connected to the nanofiltration membrane front tank (3). The operating nanofiltration group (4) and the washing residue nanofiltration group (6) are both connected to the product tank (14).
2. The membrane filtration system according to claim 1, characterized in that, There are 1-2 nanofiltration membrane pre-tanks (3) and 3 operating nanofiltration unit groups (4). Several nanofiltration units are installed in the operating nanofiltration unit groups (4).
3. The membrane filtration system according to claim 1, characterized in that, The number of washing residue nanofiltration tanks (5) is 1-3, and the washing residue nanofiltration unit (6) is equipped with several nanofiltration units.
4. The membrane filtration system according to claim 1, characterized in that, Several nanofiltration units are installed in the first-level concentration group (9), the second-level concentration group (10), the third-level concentration group (11), and the fourth-level concentration group (12).
5. The membrane filtration system according to claim 1, characterized in that, Heat exchanger 1 (301) is connected to the bottom of the nanofiltration membrane front tank (3), and heat exchanger 2 (401) is installed at the inlet of the operating nanofiltration unit (4).
6. The membrane filtration system according to claim 1, characterized in that, The fermentation broth tank (1) is equipped with a sewage pipe 1 (101) at the bottom, the nanofiltration membrane pre-tank (3) is connected to a sewage pipe 2 (302) at the bottom, the washing residue nanofiltration tank (5) is connected to a sewage pipe 3 (501) at the bottom, the first concentration tank (7) is connected to a sewage pipe 4 (701) at the bottom, and the second concentration tank (8) is connected to a sewage pipe 5 (801) at the bottom.
7. The membrane filtration system according to claim 1, characterized in that, The ceramic membrane nanofiltration unit (2), the operating nanofiltration unit (4), the sludge washing nanofiltration unit (6), the primary concentration unit (9), the secondary concentration unit (10), the tertiary concentration unit (11), and the quaternary concentration unit (12) are all connected to pure water pipelines.
8. The membrane filtration system according to claim 1, characterized in that, The washing residue nanofiltration unit (6) is provided with a light phase outlet at the top, which is connected to the second concentration tank (8). The washing residue nanofiltration unit (6) is provided with a heavy phase outlet on the side, which is connected to the first concentration tank (7).
9. The membrane filtration system according to claim 1, characterized in that, The fourth-stage concentration group (12) is equipped with a concentration outlet at the top, and the concentration outlet is equipped with a discharge pipe (1201). The concentration outlet is connected to the nanofiltration membrane front tank (3).
10. The membrane filtration system according to claim 1, characterized in that, The fermentation tank (1) is equipped with a feed pipe (102) at the top.