Equipment for continuously producing rotary ceramic membrane

Abstract

The utility model discloses equipment for continuously producing rotary ceramic membranes. The equipment comprises at least two rotary disc ceramic membrane units, a material conveying unit, a backwashing water replenishing unit, a water producing unit, a concentrated solution storage unit and a PLC (Programmable Logic Controller) control unit. According to the utility model, at least two rotary ceramic membrane units operate in parallel, and intermittent production of a single unit and continuous production of the whole set of system can be realized under the control of the PLC.

Description

Technical Field

[0001] This utility model specifically relates to a continuous production equipment for rotating ceramic membranes. Background Technology

[0002] In the production process of bio-fermentation broth, most fermentation broths are treated using traditional separation equipment such as plate and frame separators, vacuum drum separators, and centrifuges, or by methods such as flocculation sedimentation, heating, and isoelectric point precipitation. These methods can only achieve a rough separation of mycelia and solid impurities in the fermentation broth. The semi-finished or finished product liquid may still contain a large amount of soluble bacterial cells, extraneous proteins, free antibodies, and inorganic ions. These substances pose challenges to subsequent extraction and ion exchange processes, affecting extraction efficiency and the quality of the final product, and may even lead to feed liquid contamination, resulting in product spoilage.

[0003] Rotary ceramic membrane separation technology has been successfully applied to the purification and refining process of fermentation broth, solving the problems of separation, purification and concentration in the industrial production of fermentation broth, while achieving the goals of energy saving, consumption reduction and clean production.

[0004] Rotary ceramic membrane equipment is a new type of membrane separation device that combines the technical principles of centrifuges and membrane equipment. The ceramic membrane used in this equipment is disc-shaped with several curved guide channels inside, and the membrane layer is coated on the outside.

[0005] The operating principle of a rotary ceramic membrane device is to stack several ceramic membrane sheets on a hollow shaft and place the entire device inside a pressure vessel. The rotating hollow shaft drives the membrane sheets to rotate at high speed, and the resulting cross-flow acts between the membrane surface and the material inside the vessel, thus achieving the filtration process.

[0006] As a high-precision filtration and separation device, the axial-flow rotary ceramic membrane filter organically combines the technical features of centrifuges and membrane filtration. It not only has nanometer-level filtration precision, but also achieves stable filtration performance and energy-saving effect.

[0007] Compared to tubular ceramic membranes, rotating ceramic membranes resist fouling through the high-speed rotation of the membrane assembly, rather than relying on a high-flow-rate circulating pump to flush the membrane surface. The high shear force generated on the membrane surface creates a swirling sweep, which effectively removes the filter cake layer from the membrane surface over a long period, achieving efficient cleaning of the membrane surface and maintaining a high flux. This makes it suitable for the concentration and separation of materials with high concentration, high viscosity, and high solids content.

[0008] However, existing rotating ceramic membrane systems perform water production and backwashing sequentially during operation, resulting in an intermittent operation mode for a single rotating ceramic membrane unit. This is not suitable for the needs of continuous production. Therefore, further improvements are needed to meet the requirements of industrial-scale continuous production. Utility Model Content

[0009] The purpose of this invention is to provide a continuous production equipment for rotating ceramic membranes.

[0010] The technical solution of this utility model is as follows:

[0011] A continuous production equipment for rotary ceramic membranes includes at least two rotating disc ceramic membrane units, a material conveying unit, a backwashing and water replenishment unit, a product water unit, a concentrate storage unit, and a PLC control unit.

[0012] Each rotating disc ceramic membrane unit has a membrane unit cavity, a rotating hollow shaft, several rotating disc ceramic membranes, an internal circulation assembly, and a drive assembly; the bottom of the membrane unit cavity has a feed inlet, and the side wall has a concentrate outlet; the rotating hollow shaft passes through the membrane unit cavity and can rotate relative to the membrane unit cavity under the drive of the drive assembly; several rotating disc ceramic membranes are sealed and mounted parallel to each other on the rotating hollow shaft; the internal circulation assembly includes an internal circulation pump and an internal circulation check valve, and the outlet of the internal circulation pump is connected to the feed inlet through the internal circulation check valve;

[0013] The material conveying unit includes a material tank and a material pump connected in sequence;

[0014] The backwash water supply unit includes a backwash water supply tank containing RO reverse osmosis permeate and a backwash water supply pump connected in sequence.

[0015] The water production unit includes a water production storage tank;

[0016] The concentrate storage unit includes a concentrate storage tank;

[0017] In at least two rotating disc ceramic membrane units, the concentrate outlet of each rotating disc ceramic membrane unit is connected to the inlet of its internal circulation pump; the feed pump of the feed unit is connected to the inlet of the internal circulation pump located in the at least two rotating disc ceramic membrane units in sequence through a raw material check valve and a raw material electric ball valve; the backwash water replenishment pump of the backwash water replenishment unit is connected to the rotating hollow shaft of at least two rotating disc ceramic membrane units in sequence through a backwash water replenishment check valve and at least two backwash electric ball valves, and is connected to at least two rotating disc ceramic membrane units in sequence through the backwash water replenishment check valve and at least two water replenishment electric valves. The inlet of the unit's internal circulation pump; the rotating hollow shafts of at least two rotating disc ceramic membrane units are connected to the product water storage tank through at least two product water electric valves; the concentrate outlets of at least two rotating disc ceramic membrane units are connected to the concentrate storage tank through a concentrate discharge ratio regulating valve; the PLC control unit is electrically connected to the above-mentioned drive components, feed pump, backwash water pump, internal circulation pump, raw material electric ball valve, at least two backwash electric ball valves, at least two water replenishment electric valves, the internal circulation pumps of at least two rotating disc ceramic membrane units, at least two product water electric valves, and the concentrate discharge ratio regulating valve.

[0018] In a preferred embodiment of the present invention, each of the rotating disc ceramic membrane units has an upper end cover and a lower end cover. The upper end cover is sealed at the upper opening of the membrane unit cavity, and the lower end cover is sealed at the lower opening of the membrane unit cavity.

[0019] More preferably, the upper end cover has an upper support shaft, the lower end cover has a lower support shaft, and the upper end and lower section of the rotating hollow shaft are respectively installed in the upper support shaft and the lower support shaft.

[0020] More preferably, the drive assembly includes a drive motor and a reducer, the reducer being installed below the lower end cover, and the drive motor driving the rotation of the hollow shaft through the reducer.

[0021] In a preferred embodiment of this utility model, the plurality of rotating disc ceramic membranes are parallelly sealed on the rotating hollow shaft, and the inner cavity of the rotating hollow shaft is connected to the internal flow channels of the plurality of rotating disc ceramic membranes.

[0022] More preferably, among the plurality of rotating disc ceramic films, an intermediate sealing element is provided between adjacent rotating disc ceramic films, and the rotating disc ceramic films located at both ends are provided with end sealing elements.

[0023] More preferably, the lower end of the rotating hollow shaft is connected to a water-producing electric valve via a rotary joint.

[0024] In a preferred embodiment of this invention, the concentrate outlet has an internal circulation outlet valve.

[0025] The beneficial effects of this utility model are: at least two rotating ceramic membrane units operate in parallel in this utility model, and under the control of the PLC controller, it can realize intermittent production of a single unit and continuous production of the whole system. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the rotating disk ceramic membrane unit of this utility model. Detailed Implementation

[0028] The technical solution of this utility model will be further explained and described below with reference to specific embodiments and accompanying drawings.

[0029] like Figure 1 As shown, a continuous production rotary ceramic membrane equipment includes two rotating disc ceramic membrane units 1, a material conveying unit 2, a backwashing and water replenishment unit 3, a water production unit 4, a concentrate storage unit 5, and a PLC control unit (not shown in the figure).

[0030] like Figure 1 and 2 As shown, each rotating disk ceramic membrane unit 1 has a membrane unit cavity 10, a rotating hollow shaft 11, a plurality of rotating disk ceramic membranes 12, an internal circulation component 13 and a drive component 14.

[0031] The membrane unit cavity 10 can be a steel structure or a concrete container, with a feed inlet 101 at the bottom and a concentrate outlet 102 on the side wall; a rotating hollow shaft 11 passes through the membrane unit cavity 10 and can rotate relative to the membrane unit cavity 10 under the drive of the drive assembly 14; a plurality of rotating disc ceramic membranes 12 are sealed and installed parallel to each other on the rotating hollow shaft 11; the internal circulation assembly 13 includes an internal circulation pump 131 and an internal circulation check valve 132, and the outlet of the internal circulation pump 131 is connected to the feed inlet 101 in sequence through the internal circulation check valve 132 and an internal circulation feed manual valve 134;

[0032] Specifically, the membrane unit cavity 10 has an upper end cover 103 and a lower end cover 104. The upper end cover 103 is sealed over the upper opening of the membrane unit cavity 10, and the lower end cover 104 is sealed over the lower opening of the membrane unit cavity 10. Preferably, an upper flange 105 is welded to the edge of the upper opening of the membrane unit cavity 10, and a lower flange 106 is welded to the edge of the lower opening. The upper flange 105 is tightened and fixed to the upper end cover 103 by bolts, and the lower flange 106 is also tightened and fixed to the lower end cover 104 by bolts. Polytetrafluoroethylene gaskets 107 are installed between the upper flange 105 and the upper end cover 103, and between the lower flange 106 and the lower end cover 104, to provide a sealing function.

[0033] The upper end cover 103 has an upper support shaft 1031, and the lower end cover 104 has a lower support shaft 1041. The upper end and the lower section of the rotating hollow shaft 11 are respectively installed in the upper support shaft 1031 and the lower support shaft 1041.

[0034] The drive assembly 14 includes a drive motor 141 and a reducer 142. The reducer 142 is installed below the lower end cover 104. The drive motor 141 drives the rotation of the hollow shaft 11 through the reducer 142.

[0035] The plurality of rotating disc ceramic membranes 12 are installed in parallel on the rotating hollow shaft 11, and the inner cavity of the rotating hollow shaft 11 is connected to the internal flow channel of the plurality of rotating disc ceramic membranes 12. An intermediate sealing element 121 is provided between adjacent rotating disc ceramic membranes 12, and the rotating disc ceramic membranes 12 at both ends are provided with end sealing elements 122. The lower end of the rotating hollow shaft 11 is connected to a water production electric valve 111 through a rotary joint 110.

[0036] The material conveying unit 2 includes a material tank 20 and a material pump 21 connected in sequence;

[0037] The backwash water replenishment unit 3 includes a backwash water replenishment tank 30 containing RO reverse osmosis permeate and a backwash water replenishment pump 31 connected in sequence.

[0038] Water production unit 4 includes a water production storage tank 40;

[0039] Concentrate storage unit 5 includes a concentrate storage tank 50;

[0040] In the two rotating disc ceramic membrane units 1, the concentrate outlet 102 of each rotating disc ceramic membrane unit 1 is connected to the inlet of its internal circulation pump 131 through an internal circulation outlet valve 1021.

[0041] In the material conveying unit 2, the material tank 20 is connected to the material conveying pump 21 through a first manual ball valve 201. The material conveying pump 21 is connected to the inlet of the internal circulation pump 131 of the second rotary disc ceramic membrane unit 1 through a raw material check valve 211, a second manual ball valve 212 and a raw material electric ball valve 213 in sequence. The outlet of the raw material electric ball valve 213 is also provided with a first manual drain valve 214, which is used to drain the equipment in case of equipment failure and repair the equipment.

[0042] In the backwash water replenishment unit 3, the backwash water replenishment tank 30 is connected to the backwash water replenishment pump 31 through a first manual ball valve 301. The backwash water replenishment pump 31 is connected to the rotating hollow shaft 11 of the two rotating disc ceramic membrane units 1 through a backwash water replenishment check valve 311, a second manual ball valve 312, two electric ball valves 313, two manual valves 314, and two product water outlet valves 112. It is also connected to the inlet of the internal circulation pump 131 of the two rotating disc ceramic membrane units 1 through the backwash water replenishment check valve 311, the second manual ball valve 312, the two electric valves 315, and the two manual valves 316. The outlet of the second manual ball valve 312 is also equipped with a second manual drain valve 317, which is used to drain the water in case of equipment failure and repair the equipment.

[0043] The rotating hollow shaft 11 of the two rotating disc ceramic membrane unit 1 is connected to the product water storage tank 40 through the two product water outlet valves 112, the two aforementioned backwash manual valves 314 and the two product water electric valves 111.

[0044] The concentrate outlet 102 of the two rotating disc ceramic membrane unit 1 is connected to the concentrate storage tank 50 through its corresponding internal circulation outlet valve 1021 and a concentrate discharge ratio regulating valve 501.

[0045] When a rotating disc ceramic membrane unit 1 is normally filtering and producing water, the concentrate proportioning valve 501 and the backwash electric ball valve 313 are closed. The feed liquid flows through the feed unit 2, internal circulation pump 131, internal circulation check valve 132, and internal circulation feed manual valve 134 to the rotating disc ceramic membrane unit 1. The permeate flows through the rotating disc ceramic membrane 12, rotating hollow shaft 11, rotary joint 110, permeate outlet valve 112, backwash manual valve 314, and permeate electric valve 111 to the permeate storage tank 40. The concentrate flows through the internal circulation outlet valve 1021 to the inlet of the internal circulation pump 131, mixes with the makeup water (which flows through the backwash makeup water unit 3, makeup water electric valve 315, and makeup water manual valve 316 to the inlet of the internal circulation pump 131), and then circulates into the membrane unit cavity 10.

[0046] When another rotating disc ceramic membrane unit 1 is filtering water normally, the process is the same as that of the rotating disc ceramic membrane unit 1 described above, and will not be repeated here.

[0047] When the rotating disc ceramic membrane unit 1 is backwashed, the concentrate proportioning valve 501 is opened, the backwash electric ball valve 313 is opened, the relevant valves of the conveying unit 2 are closed, and the internal circulation pump 131 is closed. The backwash water flows through the backwash water replenishment unit 3, the backwash electric ball valve 313, the backwash manual valve 314, the product water outlet valve 112, the rotary joint 110, and the rotating hollow shaft 11 to the rotating disc ceramic membrane 12. It flows out from the pores on the surface of the rotating disc ceramic membrane 12, washing away the impurities on the surface of the rotating disc ceramic membrane 12. It then flows through the internal circulation outlet valve 1021 and the concentrate proportioning valve 501 to the concentrate storage tank 50.

[0048] When the other rotating disc ceramic membrane unit 2 is backwashed, the process is the same as that of the rotating disc ceramic membrane unit 1 mentioned above, and will not be described again.

[0049] Under the automatic control of the PLC controller, the alternating water production and backwashing process of the two rotating disc ceramic membrane units 1 is realized, so as to achieve continuous water production of the whole system.

[0050] 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 continuous production rotating ceramic membrane apparatus, characterized by: The application relates to a ceramic membrane unit, which comprises at least two rotating disc ceramic membrane units, a feed unit, a backwashing water supply unit, a water production unit, a concentrated liquid storage unit and a PLC control unit. Each rotating disc ceramic membrane unit is provided with a membrane unit cavity, a rotating hollow shaft, a plurality of rotating disc ceramic membranes, an internal circulation assembly and a driving assembly; the bottom of the membrane unit cavity is provided with a feed inlet, and the side wall is provided with a concentrated liquid outlet. The rotating hollow shaft penetrates through the membrane unit cavity and can rotate relative to the membrane unit cavity under the driving of the driving assembly; the plurality of rotating disc ceramic membranes are sealed and arranged in parallel on the rotating hollow shaft; the internal circulation assembly comprises an internal circulation pump and an internal circulation check valve, and the outlet of the internal circulation pump is communicated with the feed inlet through the internal circulation check valve. The feed unit comprises a feed tank and a feed pump which are communicated in sequence. The backwashing water supply unit comprises a backwashing water supply tank containing RO backwashing water and a backwashing water supply pump which are communicated in sequence. The water production unit comprises a water production storage tank. The concentrated liquid storage unit comprises a concentrated liquid storage tank. In the at least two rotating disc ceramic membrane units, the concentrated liquid outlet of each rotating disc ceramic membrane unit is communicated with the inlet of the internal circulation pump; the feed pump of the feed unit is communicated with the inlets of the internal circulation pumps of the at least two rotating disc ceramic membrane units through a raw material check valve and a raw material electric ball valve in sequence; the backwashing water supply pump of the backwashing water supply unit is communicated with the rotating hollow shafts of the at least two rotating disc ceramic membrane units through a backwashing water supply check valve and at least two backwashing electric ball valves in sequence, and is communicated with the inlets of the internal circulation pumps of the at least two rotating disc ceramic membrane units through the backwashing water supply check valve and at least two water supply electric valves in sequence; the rotating hollow shafts of the at least two rotating disc ceramic membrane units are communicated with the water production storage tank through at least two water production electric valves; the concentrated liquid outlets of the at least two rotating disc ceramic membrane units are communicated with the concentrated liquid storage tank through a concentrated liquid discharge proportional regulating valve; and the PLC control unit is electrically connected with the above-mentioned driving assembly, feed pump, backwashing water supply pump, internal circulation pump, raw material electric ball valve, at least two backwashing electric ball valves, at least two water supply electric valves, internal circulation pumps of the at least two rotating disc ceramic membrane units, at least two water production electric valves and concentrated liquid discharge proportional regulating valve.

2. The continuous production rotating ceramic membrane apparatus of claim 1, wherein: In each rotating disc ceramic membrane unit, the membrane unit cavity is provided with an upper end cover and a lower end cover, the upper end cover is sealed and arranged on the upper opening of the membrane unit cavity, and the lower end cover is sealed and arranged on the lower opening of the membrane unit cavity.

3. A continuous production rotating ceramic membrane apparatus as claimed in claim 2, characterized in that: The upper end cover is provided with an upper support shaft, the lower end cover is provided with a lower support shaft, and the upper end and lower section of the rotating hollow shaft are arranged in the upper support shaft and lower support shaft respectively.

4. The continuous production rotating ceramic membrane apparatus of claim 2, wherein: The driving assembly comprises a driving motor and a speed reducer, the speed reducer is arranged below the lower end cover, and the driving motor drives the rotation of the rotating hollow shaft through the speed reducer.

5. The continuous production rotating ceramic membrane apparatus of claim 1, wherein: The plurality of rotating disc ceramic membranes are sealed and arranged in parallel on the rotating hollow shaft, and the inner cavity of the rotating hollow shaft is communicated with the internal flow channels of the plurality of rotating disc ceramic membranes.

6. A continuous production rotating ceramic membrane apparatus as claimed in claim 5, characterized in that: In the plurality of rotating disc ceramic membranes, intermediate sealing members are arranged between adjacent rotating disc ceramic membranes, and end sealing members are arranged on the rotating disc ceramic membranes at both ends.

7. A continuous production rotating ceramic membrane apparatus as claimed in claim 5, wherein: The lower end of the rotating hollow shaft is connected to a water production motor valve through a rotating joint.

8. The continuous production rotating ceramic membrane apparatus of claim 1, wherein: The concentrate outlet has an internal circulation outlet valve.

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