Inverted rotary ceramic membrane equipment

Abstract

The utility model discloses inverted rotary ceramic membrane equipment. The inverted rotary ceramic membrane equipment comprises an inverted rotary ceramic membrane unit, a material conveying unit, a water producing unit, a backwashing water replenishing unit and a control unit, through the design of the spraying system, the defects of low water production efficiency, high energy consumption and frequent backwashing in the prior art are effectively improved, longer water production time, lower operation cost and more simplified process flow are realized, and an efficient, energy-saving, economical and practical solution is provided for the field of fermentation liquor separation and purification.

Description

Technical Field

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

[0002] In the production of bio-fermentation broth, traditional separation equipment such as plate and frame filters, vacuum drums, and centrifuges, or methods such as flocculation sedimentation, heating, and isoelectric point precipitation, can only achieve coarse separation of mycelia and solid impurities in the fermentation broth. However, soluble bacterial cells, extraneous proteins, organic antibodies, and inorganic ions often remain in the semi-finished or finished liquid. These impurities significantly interfere with subsequent extraction and ion exchange processes, reducing extraction efficiency, affecting product quality, and may even lead to feed liquid contamination and product spoilage.

[0003] Rotary ceramic membrane separation technology has been widely used in the purification and refining of fermentation broths in recent years, successfully solving the separation, purification, and concentration problems in industrial production, while achieving the goals of energy saving, consumption reduction, and clean production. Existing rotary ceramic membrane equipment typically uses disc-shaped ceramic membranes with internal curved flow channels and a membrane coating on the outer surface. During operation, multiple ceramic membranes are stacked on a hollow shaft and placed inside a pressure vessel. The rotation of the hollow shaft drives the membranes to rotate at high speed, producing a cross-flow filtration effect. 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. This makes it 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 has the following 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 flow, a multi-stage permeate process is typically required, with the drawing pressure gradually increasing. 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, resulting in a reduction in filtration flux and necessitating frequent backwashing operations, increasing process complexity and operating costs. These problems limit the further application of rotating ceramic membrane equipment in high-efficiency, energy-saving production. Utility Model Content

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

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

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

[0008] An inverted 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 a lower opening and a feed inlet at its bottom. The rotating hollow shaft is vertically arranged inside the membrane unit cavity, with several rotating disc ceramic membranes fitted parallel to and sealed on its upper 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 lower end of the rotating hollow shaft to connect to the inner cavity of the rotating hollow shaft. The reducer is located below the lower opening of the membrane unit cavity via several support rods, and the rotary drive motor drives the lower 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, a suction pump and a water production check valve. The rotary joint is connected to the water production storage tank in sequence through the water production electric ball valve, the suction pump and the water production check valve.

[0011] The backwash water replenishment unit includes an RO reverse osmosis water storage tank, a backwash water replenishment pump, a backwash water replenishment check valve, 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, the backwash water replenishment check valve, 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 water replenishment check valve, 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 disposed on the top wall of the membrane unit cavity, and the second support shaft is disposed on the bottom wall 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, so as to reduce the swing of the rotating hollow shaft.

[0014] In a preferred embodiment of the present invention, an intermediate sealing element is provided between adjacent rotating disc ceramic films, and an end sealing element is provided for the uppermost and lowermost rotating disc ceramic films.

[0015] In a preferred embodiment of this utility model, a manual drain valve is provided between the feed inlet of the membrane unit cavity and the electric ball valve for conveying materials.

[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 rotary joint is provided with a manual discharge 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 invention 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 permeate extraction process. This design significantly increases the shear force on the membrane surface, enhances the flushing effect on the filter cake on the membrane surface, thereby effectively mitigating membrane fouling, extending the duration of a single permeate operation, and reducing the frequency of backwashing operations. This not only improves the operating efficiency of the equipment but also reduces maintenance costs.

[0021] 2. By spraying RO reverse osmosis water, this invention can effectively dilute the concentration of the feed solution within the rotating disc ceramic membrane unit, reducing the pumping pressure of the permeate. Unlike existing technologies that rely on multi-stage permeate processes, this invention can achieve a high permeate volume with a single-stage process, simplifying the process flow and improving filtration efficiency.

[0022] 3. This invention significantly reduces energy consumption by optimizing membrane surface cleaning methods and lowering suction pressure. Furthermore, the equipment's simple structural design achieves the aforementioned functions simply by adding a spray system, eliminating the need for complex multi-stage systems or high-strength materials, thus reducing manufacturing and operating costs and facilitating industrial application.

[0023] 4. This invention maintains high filtration accuracy while achieving efficient and energy-saving operation through simple structural improvements. The equipment operates stably, is easy to maintain, and is suitable for separating various high-concentration and high-viscosity materials, making it highly economical and worthy of widespread 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, an inverted rotating ceramic membrane device includes an inverted 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 inverted 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 several rotating disc ceramic membranes 15.

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

[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 on its upper part. The inner cavity of the rotating hollow shaft 14 is connected to the internal flow channels of the several rotating disc ceramic membranes 15. An intermediate seal 151 is provided between adjacent rotating disc ceramic membranes 15. The uppermost and lowermost rotating disc ceramic membranes 15 are each provided with an end seal 152. A rotary joint 11 is installed at the lower end of the rotating hollow shaft 14 to connect with the inner cavity of the rotating hollow shaft 14. The rotary joint is provided with a manual discharge valve 111. The system also includes a first support shaft 16 and a second support shaft 17. The first support shaft 16 is disposed on the top wall of the membrane unit cavity 10, and the second support shaft 17 is disposed on the bottom wall 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 swing of the rotating hollow shaft 14.

[0030] The reducer 12 is located below the lower opening 101 of the membrane unit cavity 10 via several support rods 121. The rotary drive motor 13 drives the lower 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 through the material pump 23, the material check valve 21, and the material electric ball valve 22 in sequence. A manual drain valve 1031 is provided between the inlet 103 of the membrane unit cavity 10 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, a suction pump 32 and a water production check valve 33. The rotary joint 11 is connected to the water production storage tank 30 in sequence through the water production electric ball valve 31, the suction pump 32 and the water production check valve 33.

[0033] The backwash water replenishment unit 4 includes an RO reverse osmosis water storage tank 40, a backwash water replenishment pump 41, a backwash water replenishment check valve 45, 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, the backwash water replenishment check valve 45, 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 water replenishment check valve 45, 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. An inverted rotating ceramic membrane device, characterized in that: It includes an inverted rotating ceramic membrane unit, a material conveying unit, a water production unit, a backwash and water replenishment unit, and a control unit. An inverted 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 a lower opening and a feed inlet at its bottom. The rotating hollow shaft is vertically arranged inside the membrane unit cavity, with several rotating disc ceramic membranes fitted parallel to and sealed on its upper 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 lower end of the rotating hollow shaft to connect to the inner cavity of the rotating hollow shaft. The reducer is located below the lower opening of the membrane unit cavity via several support rods, and the rotary drive motor drives the lower 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, a suction pump and a water production check valve. The rotary joint is connected to the water production storage tank in sequence through the water production electric ball valve, the suction pump and the water production check valve. The backwash water replenishment unit includes an RO reverse osmosis water storage tank, a backwash water replenishment pump, a backwash water replenishment check valve, 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, the backwash water replenishment check valve, 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 water replenishment check valve, 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 inverted 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 located on the top wall of the membrane unit cavity, and the second support shaft is located on the bottom wall 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 inverted 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 for the uppermost and lowermost rotating disc ceramic membranes.

4. The inverted rotating ceramic membrane device as described in claim 1, characterized in that: A manual drain valve is provided between the feed inlet of the membrane unit cavity and the electric ball valve for conveying materials.

5. The inverted 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 inverted rotating ceramic membrane device as described in claim 1, characterized in that: The rotary joint is equipped with a manual discharge valve.

7. An inverted 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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