Vertical rotary ceramic membrane equipment

Abstract

The utility model discloses vertical rotary ceramic membrane equipment which comprises a vertical rotary ceramic membrane unit, a material conveying unit, a water producing unit, a backwashing water replenishing unit and a control unit. According to the utility model, the defects of low water production efficiency, frequent backwashing and high energy consumption of the existing rotary ceramic membrane equipment are overcome through a spraying water replenishing and efficient membrane surface cleaning mechanism, a more efficient and more economical fermentation liquor separation and purification process is realized, and remarkable technical advantages and application values are realized.

Description

Technical Field

[0001] This utility model specifically relates to a vertical rotating ceramic membrane device. Background Technology

[0002] In the production of bio-fermentation broth, separation and purification are crucial steps. Current technologies typically employ traditional equipment such as plate and frame filters, vacuum drum filters, and centrifugal separation, or methods like flocculation sedimentation, heating, and isoelectric point precipitation to coarsely separate mycelia and solid impurities from the fermentation broth. However, these methods are insufficient to effectively remove soluble bacteria, extraneous proteins, organic antibodies, and inorganic ions from the fermentation broth, resulting in residual impurities in the semi-finished or finished product. This impurities affect the efficiency of subsequent extraction and ion exchange processes, reduce product quality, and may even cause feed contamination, leading to product spoilage.

[0003] In recent years, rotary ceramic membrane separation technology has been increasingly applied to the purification and refining processes of fermentation broths, successfully solving the separation, purification, and concentration challenges in industrial production and achieving the goals of energy saving, consumption reduction, and cleaner production. Rotary ceramic membrane equipment combines the advantages of centrifuges and membrane separation technologies, employing disc-shaped ceramic membranes with internal curved flow channels and a membrane coating on the outer surface. This equipment stacks several ceramic membranes on a hollow shaft, places them inside a pressure vessel, and utilizes the rotation of the hollow shaft to drive the membranes at high speed, generating a cross-flow effect between the membrane surface and the material, thus achieving highly efficient filtration. Compared to traditional tubular ceramic membranes, rotary ceramic membranes generate high shear force and swirling flow through the high-speed rotation of the membrane assembly, effectively removing the filter cake layer on the membrane surface and maintaining a high filtration flux. It is particularly suitable for the concentration and separation of materials with high concentration, high viscosity, and high solids content.

[0004] However, existing rotating ceramic membrane equipment still has certain drawbacks. First, as the dialysate is continuously drawn in, the concentration of the feed solution within the membrane unit gradually increases, leading to a decrease in permeate efficiency. To maintain permeate production, a multi-stage permeate process is required, gradually increasing the suction pressure. This not only places higher demands on the strength of the equipment materials but also significantly increases energy consumption. Second, filter cake easily forms on the surface of the rotating ceramic membrane, causing a reduction in filtration flux. To maintain filtration performance, frequent backwashing operations are necessary, increasing process complexity and operating costs. These problems limit the further promotion and application of rotating ceramic membrane equipment in high-efficiency, low-energy production. Utility Model Content

[0005] The purpose of this invention is to provide a vertical rotating ceramic membrane device.

[0006] The technical solution of this utility model is as follows:

[0007] A vertical rotating ceramic membrane device includes a vertical rotating ceramic membrane unit, a material conveying unit, a water production unit, a backwash and water replenishment unit, and a control unit.

[0008] A vertical rotating ceramic membrane unit includes a membrane unit cavity, a rotary joint, a reducer, a rotary drive motor, a rotating hollow shaft, and several rotating disc ceramic membranes. The membrane unit cavity has an upper opening, a feed inlet on the lower part of its side wall, and a concentrate discharge outlet at its bottom. The rotating hollow shaft is vertically arranged in the membrane unit cavity, with several rotating disc ceramic membranes fitted parallel to and sealed on its lower part. The inner cavity of the rotating hollow shaft is connected to the internal flow channels of the several rotating disc ceramic membranes. The rotary joint is installed at the upper end of the rotating hollow shaft to connect to the inner cavity of the rotating hollow shaft. The reducer is located at the upper opening of the membrane unit cavity, and the rotary drive motor drives the upper part of the rotating hollow shaft through the reducer.

[0009] The material conveying unit includes a material tank, a material pump, a material check valve, and a material electric ball valve. The material tank is connected to the inlet of the membrane unit cavity in sequence through the material pump, the material check valve, and the material electric ball valve.

[0010] The water production unit includes a water production storage tank, a water production electric ball valve, and a suction pump. The rotary joint is connected to the water production storage tank in sequence through the water production electric ball valve and the suction pump.

[0011] The backwash water replenishment unit includes an RO reverse osmosis water storage tank, a backwash water replenishment pump, a water replenishment electric ball valve, a backwash electric ball valve, and a spray assembly disposed in the cavity of the membrane unit. The RO reverse osmosis water storage tank is connected to the spray assembly in sequence through the backwash water replenishment pump and the water replenishment electric ball valve, and is connected to the inner cavity of the rotating hollow shaft in sequence through the backwash water replenishment pump, the backwash electric ball valve, and the rotary joint.

[0012] The control unit is electrically connected to the aforementioned rotary drive motor, feed pump, feed electric ball valve, product water electric ball valve, suction pump, backwash water pump, water replenishment electric ball valve, and backwash electric ball valve.

[0013] In a preferred embodiment of the present invention, a first support shaft and a second support shaft are further included. The first support shaft is suspended in the membrane unit cavity by a plurality of support rods, and the second support shaft is located at the bottom of the membrane unit cavity. The upper part of the rotating hollow shaft is mounted on the first support shaft and the lower part is mounted on the second support shaft to reduce the swing of the rotating hollow shaft.

[0014] In a preferred embodiment of the present invention, an intermediate sealing member is provided between adjacent rotating disc ceramic membranes, and an end sealing member is provided at the lowermost rotating disc ceramic membrane.

[0015] In a preferred embodiment of this utility model, the concentrate discharge port of the membrane unit cavity is provided with a manual concentrate discharge valve.

[0016] In a preferred embodiment of the present invention, an overflow port is provided on the upper side wall of the membrane unit cavity, and the overflow port is provided with a manual overflow valve.

[0017] In a preferred embodiment of this utility model, the feed inlet of the membrane unit cavity is provided with a manual drain valve.

[0018] In a preferred embodiment of the present invention, the spray assembly includes a main spray pipe and a plurality of spray branch pipes equally spaced on the main spray pipe, each spray branch pipe corresponding to the gap between two adjacent rotating disc ceramic membranes.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model adds a main spray pipe and spray branch pipes next to the rotating disc ceramic membrane to spray RO reverse osmosis water into the gaps between the membrane sheets during the pumping of permeate water. This design effectively flushes and removes the filter cake layer formed on the membrane surface by enhancing the shear force on the membrane surface, slowing down the membrane fouling rate, thereby significantly extending the single permeate water operation time, reducing the frequency of backwashing operations, and lowering maintenance costs and process downtime.

[0021] 2. By using a spray-on RO reverse osmosis water replenishment mechanism, this invention effectively reduces the concentration of the feed solution within the vertical rotating ceramic membrane unit, improves filtration conditions, and reduces water production resistance caused by high-concentration feed solution. This not only increases water production but also avoids the complex processes of multi-stage water production, simplifying the operation process.

[0022] 3. Thanks to the reduced concentration of the feed solution and effective control of the filter cake on the membrane surface, this invention significantly reduces the pressure required for permeate extraction. Compared with existing technologies, it reduces energy consumption while maintaining high-flux filtration, meeting the production requirements for energy conservation and environmental protection.

[0023] 4. The vertical rotating ceramic membrane equipment of this utility model has a compact structural design. The newly added spraying component is seamlessly integrated with the existing vertical rotating ceramic membrane unit, without the need for significant modifications to the original equipment architecture. This design reduces manufacturing and modification costs, and facilitates industrial promotion and application. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0025] The technical solution of this utility model will be further explained and described below with reference to specific embodiments and accompanying drawings.

[0026] like Figure 1As shown, a vertical rotating ceramic membrane device includes a vertical rotating ceramic membrane unit 1, a material conveying unit 2, a water production unit 3, a backwash and water replenishment unit 4, and a control unit (not shown in the figure).

[0027] The vertical rotating ceramic membrane unit 1 includes a membrane unit cavity 10, a rotary joint 11, a reducer 12, a rotary drive motor 13, a rotating hollow shaft 14, and a plurality of rotating disc ceramic membranes 15.

[0028] The membrane unit cavity 10 has an upper opening 101, an overflow port 102 on the upper part of its side wall, a feed port 103 on the lower part of its side wall, and a concentrate discharge port 104 at its bottom. The overflow port 102 is equipped with a manual overflow valve 1021 (which is generally kept open; if the liquid level in the membrane unit cavity 10 reaches this level, it will automatically overflow). The feed port 103 is equipped with a manual drain valve 1031, and the concentrate discharge port 104 is equipped with a manual concentrate discharge valve 1041.

[0029] A rotating hollow shaft 14 is vertically disposed within the membrane unit cavity 10. Several rotating disc ceramic membranes 15 are fitted parallel to and sealed at its lower part. The inner cavity of the rotating hollow shaft 14 communicates with the internal flow channels of the rotating disc ceramic membranes 15. An intermediate seal 151 is provided between adjacent rotating disc ceramic membranes 15, and an end seal 152 is provided at the lowest rotating disc ceramic membrane 15. A rotary joint 11 is installed at the upper end of the rotating hollow shaft 14 to communicate with the inner cavity of the rotating hollow shaft 14. The unit also includes a first support shaft 16 and a second support shaft 17. The first support shaft 16 is suspended within the membrane unit cavity 10 by several support rods 161. The second support shaft 17 is located at the bottom of the membrane unit cavity 10. The upper part of the rotating hollow shaft 14 is mounted on the first support shaft 16, and the lower part is mounted on the second support shaft 17 to reduce the oscillation of the rotating hollow shaft 14.

[0030] The reducer 12 is located at the upper opening 101 of the membrane unit cavity 10, and the rotary drive motor 13 drives the upper part of the rotary hollow shaft 14 through the reducer 12.

[0031] The material conveying unit 2 includes a material tank 20, a material pump 23, a material check valve 21 and a material electric ball valve 22. The material tank 20 is connected to the inlet 103 of the membrane unit cavity 10 in sequence through the material pump 23, the material check valve 21 and the material electric ball valve 22.

[0032] The water production unit 3 includes a water production storage tank 30, a water production electric ball valve 31 and a suction pump 32. The rotary joint 11 is connected to the water production storage tank 30 in sequence through the water production electric ball valve 31 and the suction pump 32.

[0033] The backwash water replenishment unit 4 includes an RO reverse osmosis water storage tank 40, a backwash water replenishment pump 41, a water replenishment electric ball valve 42, a backwash electric ball valve 43, and a spray assembly 44 disposed in the membrane unit cavity 10. The RO reverse osmosis water storage tank 40 is connected to the spray assembly 44 in sequence through the backwash water replenishment pump 41 and the water replenishment electric ball valve 42, and is connected to the inner cavity of the rotating hollow shaft 14 in sequence through the backwash water replenishment pump 41, the backwash electric ball valve 43, and the rotary joint 11. The spray assembly 44 includes a spray main pipe 441 and a plurality of spray branch pipes 442 equally spaced on the spray main pipe 441. Each spray branch pipe 442 corresponds to the gap between two adjacent rotating disc ceramic membranes 15.

[0034] The control unit is electrically connected to the aforementioned rotary drive motor 13, feed pump 23, feed electric ball valve 22, product water electric ball valve 31, suction pump 32, backwash water pump 41, water replenishment electric ball valve 42, and backwash electric ball valve 43.

[0035] The working process of this utility model is as follows:

[0036] During normal filtration and water production, the control unit activates the rotary drive motor 13, feed pump 23, feed electric ball valve 22, suction pump 32, product water electric ball valve 31, backwash water pump 41, and water replenishment electric ball valve 42, while closing the backwash electric ball valve 43. This ensures normal water production during equipment operation. The rotating membrane generates a cross-flow effect, creating shear force on the membrane surface. Some liquid enters the internal flow channel of the membrane through the membrane pores, becoming product water. The product water passes through the inner cavity of the rotating hollow shaft 14 and is drawn into the product water storage tank 30 by the suction pump 32 via the rotary joint 11. Simultaneously, the RO reverse osmosis water used for replenishment washes the gaps of the rotating disc ceramic membrane 15, enhancing the shear force on the membrane surface, flushing the filter cake, mitigating membrane fouling, and extending the water production time.

[0037] During backwashing, the backwash water pump 41 and the backwash electric ball valve 43 are turned on by the control unit, while the rotary drive motor 13, the feed pump 23, the feed electric ball valve 22, the suction pump 32, the product water electric ball valve 31, the backwash water pump 41 and the water replenishment electric ball valve 42 are turned off to perform backwashing. This allows the RO reverse osmosis water used for backwashing to flow out from the surface pores of the rotating disc ceramic membrane 15, cleaning the contaminants on the membrane surface, restoring the membrane's filtration performance, and achieving the backwashing effect.

[0038] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.

Claims

1. A vertical rotating ceramic membrane device, characterized in that: It includes a vertical rotating ceramic membrane unit, a material conveying unit, a water production unit, a backwash and water replenishment unit, and a control unit. A vertical rotating ceramic membrane unit includes a membrane unit cavity, a rotary joint, a reducer, a rotary drive motor, a rotating hollow shaft, and several rotating disc ceramic membranes. The membrane unit cavity has an upper opening, a feed inlet on the lower part of its side wall, and a concentrate discharge outlet at its bottom. The rotating hollow shaft is vertically arranged in the membrane unit cavity, with several rotating disc ceramic membranes fitted parallel to and sealed on its lower part. The inner cavity of the rotating hollow shaft is connected to the internal flow channels of the several rotating disc ceramic membranes. The rotary joint is installed at the upper end of the rotating hollow shaft to connect to the inner cavity of the rotating hollow shaft. The reducer is located at the upper opening of the membrane unit cavity, and the rotary drive motor drives the upper part of the rotating hollow shaft through the reducer. The material conveying unit includes a material tank, a material pump, a material check valve, and a material electric ball valve. The material tank is connected to the inlet of the membrane unit cavity in sequence through the material pump, the material check valve, and the material electric ball valve. The water production unit includes a water production storage tank, a water production electric ball valve, and a suction pump. The rotary joint is connected to the water production storage tank in sequence through the water production electric ball valve and the suction pump. The backwash water replenishment unit includes an RO reverse osmosis water storage tank, a backwash water replenishment pump, a water replenishment electric ball valve, a backwash electric ball valve, and a spray assembly disposed in the cavity of the membrane unit. The RO reverse osmosis water storage tank is connected to the spray assembly in sequence through the backwash water replenishment pump and the water replenishment electric ball valve, and is connected to the inner cavity of the rotating hollow shaft in sequence through the backwash water replenishment pump, the backwash electric ball valve, and the rotary joint. The control unit is electrically connected to the aforementioned rotary drive motor, feed pump, feed electric ball valve, product water electric ball valve, suction pump, backwash water pump, water replenishment electric ball valve, and backwash electric ball valve.

2. The vertical rotating ceramic membrane device as described in claim 1, characterized in that: It also includes a first support shaft and a second support shaft. The first support shaft is suspended in the membrane unit cavity by several support rods, and the second support shaft is located at the bottom of the membrane unit cavity. The upper part of the rotating hollow shaft is mounted on the first support shaft, and the lower part is mounted on the second support shaft to reduce the swing of the rotating hollow shaft.

3. The vertical rotating ceramic membrane device as described in claim 1, characterized in that: An intermediate seal is provided between adjacent rotating disc ceramic membranes, and an end seal is provided at the bottom of the rotating disc ceramic membrane.

4. The vertical rotating ceramic membrane device as described in claim 1, characterized in that: The membrane unit cavity is equipped with a manual concentrate discharge valve at the concentrate discharge port.

5. The vertical rotating ceramic membrane device as described in claim 1, characterized in that: An overflow port is provided on the upper side wall of the membrane unit cavity, and the overflow port is equipped with a manual overflow valve.

6. The vertical rotating ceramic membrane device as described in claim 1, characterized in that: The feed inlet of the membrane unit cavity is equipped with a manual drain valve.

7. A vertical rotating ceramic membrane device as described in any one of claims 1 to 6, characterized in that: The spray assembly includes a main spray pipe and a plurality of spray branch pipes equally spaced on the main spray pipe, each spray branch pipe corresponding to the gap between two adjacent rotating disc ceramic membranes.

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