Continuous production and washing negative pressure type rotary ceramic membrane equipment

Abstract

The utility model discloses negative pressure type rotary ceramic membrane equipment for continuously producing and washing. The negative pressure type rotary ceramic membrane equipment comprises at least two rotary disc ceramic membrane units, a material conveying unit, a backwashing water replenishing unit, a water producing unit, a filter residue storage unit and a PLC (Programmable Logic Controller) control unit, according to the utility model, the spraying main pipe is additionally arranged beside the membrane of the rotary ceramic membrane, and RO (Reverse Osmosis) water is sprayed into gaps of the membrane in the water suction and production process, so that the shearing force on the surface of the rotary disc ceramic membrane is improved, the washing of a filter cake on the surface of the rotary disc ceramic membrane is enhanced, the water production time is prolonged, and the backwashing frequency is reduced; a plurality of sets of rotary ceramic membrane units can be connected in series for operation, and intermittent production of a single unit and continuous production of the whole set of system are realized under the control of the PLC control unit.

Description

TECHNICAL FIELD

[0001] The utility model relates to a continuous production washing negative pressure type rotary ceramic membrane equipment. BACKGROUND

[0002] In the production process of biological fermentation broth, most of the fermentation broth is treated by traditional separation equipment such as plate frame, vacuum drum and centrifugal, or by flocculation sedimentation, heating and isoelectric point precipitation method. These methods can only achieve rough separation of mycelium and solid impurities in the fermentation broth. In the semi-finished or finished liquid, there may still be a large amount of soluble mycelium, impurities, free antibodies and inorganic ions. These substances bring challenges to the later extraction and ion exchange process, affect the extraction efficiency and the quality of the final product, and even may cause the liquid pollution, thereby making the product scrap.

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

[0004] The rotary ceramic membrane equipment is a new type of membrane separation equipment, which combines the technical principles of centrifuge and membrane equipment. The ceramic membrane used in the equipment is in the shape of a disc, with several curve type flow guide grooves designed inside and a membrane layer coated on the outside.

[0005] The operating principle of the rotary ceramic membrane equipment is to stack several ceramic membrane sheets on a hollow shaft and place the whole in a pressure vessel. The membrane sheets are driven to rotate at high speed by rotating the hollow shaft, and the cross flow generated by rotation acts between the membrane surface and the material in the vessel to realize the filtration process.

[0006] The axial flow rotary ceramic membrane filter, as a high-precision filtration and separation equipment, organically combines the technical characteristics of centrifuge and membrane filtration, not only has nanometer-level filtration precision, but also realizes stable filtration performance and energy saving effect.

[0007] Compared with tubular ceramic membranes, the rotary ceramic membrane resists pollution and blockage by high-speed rotation of the membrane sheet assembly, rather than relying on a large flow circulating pump to flush the membrane surface to prevent pollution. The high shear force generated on the membrane surface forms a rotational flow, and this shear force can effectively remove the filter cake layer on the membrane surface for a long time, realize efficient cleaning of the membrane surface, maintain a large flux, and is suitable for concentration and separation of high-concentration, high-viscosity and high-solid-content materials.

[0008] However, the existing rotary ceramic membrane sequentially performs water production, backwashing and other steps during operation, and the single rotary ceramic membrane unit belongs to a batch operation mode, which is not suitable for continuous production requirements. Therefore, further improvement is needed to meet the requirements of industrial continuous production. UTILITY MODEL CONTENTS

[0009] The utility model discloses a kind of continuous production washing negative pressure type rotary ceramic membrane equipment.

[0010] The technical scheme of the utility model is as follows:

[0011] A kind of continuous production washing negative pressure type rotary ceramic membrane equipment, including at least two rotating disc ceramic membrane units, a feed unit, a backwash water replenishing unit, water production unit, a filter residue storage unit and a PLC control unit,

[0012] Each rotating disc ceramic membrane unit has a membrane unit cavity, a rotating hollow shaft, a plurality of rotating disc ceramic membranes, a spray assembly and a drive assembly;The bottom of the membrane unit cavity has a feed inlet, and the upper part has an overflow port, which is located above the highest set liquid level of the membrane unit cavity;The rotating hollow shaft penetrates the membrane unit cavity and can rotate relative to the membrane unit cavity under the drive of the drive assembly;The plurality of rotating disc ceramic membranes are sealed and arranged on the rotating hollow shaft in parallel with each other;The spray assembly is arranged in the membrane unit cavity to spray the plurality of rotating disc ceramic membranes;

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

[0014] The backwash water replenishing unit includes a backwash water replenishing tank containing RO reverse osmosis water production and a backwash water replenishing pump connected in sequence;

[0015] The water production unit includes a water production vacuum pump and a water production storage tank connected in sequence;

[0016] The filter residue storage unit includes a filter residue storage tank;

[0017] In the at least two rotating disc ceramic membrane units, the overflow port of one rotating disc ceramic membrane unit is connected to the feed inlet of another rotating disc ceramic membrane unit, and the series connection of the at least two rotating disc ceramic membrane units is realized in this way;The feed pump of the feed unit is connected to the feed inlet of the first rotating disc ceramic membrane unit in sequence through a raw material check valve and a raw material electric ball valve;The backwash water replenishing pump of the backwash water replenishing unit is connected to the rotating hollow shafts of the at least two rotating disc ceramic membrane units in sequence through a backwash water replenishing check valve and at least two backwash electric ball valves, and is connected to the spray assemblies of the at least two rotating disc ceramic membrane units in sequence through the backwash water replenishing check valve and at least two water replenishing electric valves;The rotating hollow shafts of the at least two rotating disc ceramic membrane units are connected to the water production vacuum pump and the water production storage tank in sequence through at least two water production electric valves;The overflow port of the last rotating disc ceramic membrane unit is connected to the filter residue storage tank through a filter residue discharge proportional regulating valve;The PLC control unit is electrically connected to the above-mentioned drive assembly, feed pump, backwash water replenishing pump, water production vacuum pump, raw material electric ball valve, at least two backwash electric ball valves, at least two water replenishing electric valves, at least two water production electric valves and filter residue discharge proportional regulating valve.

[0018] In one preferred embodiment of the present application, each of the rotating disc ceramic membrane units has a membrane unit cavity with an upper end cover and a lower end cover, the upper end cover is arranged on the upper opening of the membrane unit cavity, and the lower end cover is arranged on the lower opening of the membrane unit cavity.

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

[0020] Further preferably, 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.

[0021] In one preferred embodiment of the present application, the plurality of rotating disc ceramic membranes are arranged in parallel on the rotating hollow shaft, and the inner cavity of the rotating hollow shaft is in communication with the internal flow channels of the plurality of rotating disc ceramic membranes.

[0022] Further preferably, among 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.

[0023] Further preferably, the lower end of the rotating hollow shaft is connected to a water production electric valve through a rotating joint.

[0024] In one preferred embodiment of the present application, the spraying assembly comprises a spraying main pipe and a plurality of spraying heads arranged in sequence along the length direction of the spraying main pipe, and one spraying head corresponds to the gap between adjacent rotating disc ceramic membranes.

[0025] The present application has the following beneficial effects:

[0026] 1. The present application increases a spraying main pipe beside the rotating ceramic membrane, sprays RO reverse osmosis water into the gap between the membrane during water production by suction, improves the shear force on the surface of the rotating disc ceramic membrane, strengthens the flushing of the filter cake on the surface of the rotating disc ceramic membrane, prolongs the water production time, and reduces the frequency of backwashing.

[0027] 2. The present application can reduce the raw liquid concentration of the rotating disc ceramic membrane unit, reduce the water production suction pressure, improve the water production capacity, has a simple equipment structure, simplifies the process flow, and reduces energy consumption.

[0028] 3. The present application can adopt multiple sets of rotating ceramic membrane units in series, realizes intermittent production of a single unit under the control of a PLC control unit, and realizes continuous production of the whole system. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of this utility model.

[0030] Figure 2 This is a schematic diagram of the structure of the rotating disk ceramic membrane unit of this utility model. Detailed Implementation

[0031] The technical solution of this utility model will be further explained and described below with reference to specific embodiments and accompanying drawings.

[0032] like Figure 1 As shown, a continuous production washing negative pressure rotary ceramic membrane equipment includes two rotating disc ceramic membrane units 1, a material conveying unit 2, a backwash water replenishment unit 3, a water production unit 4, a filter residue storage unit 5, and a PLC control unit (not shown in the figure).

[0033] like Figure 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, a spray assembly 13 and a drive assembly 14.

[0034] The membrane unit cavity 10 can be a steel structure or a concrete container, with an inlet 101 at the bottom and an overflow port 102 at the top. The overflow port 102 is located above the highest set liquid level of the membrane unit cavity 10. Preferably, the overflow port 102 is equipped with an overflow valve 1021 (generally kept open, automatically overflowing if the liquid level reaches this level). 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. A spray assembly 13 is located inside the membrane unit cavity 10 to spray the plurality of rotating disc ceramic membranes 12.

[0035] 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. Sealing 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 achieve a sealing function.

[0036] The upper end cover 103 has an upper supporting shaft 1031, the lower end cover 104 has a lower supporting shaft 1041, and the upper end and lower end of the rotating hollow shaft 11 are respectively arranged in the upper supporting shaft 1031 and the lower supporting shaft 1041;

[0037] The driving assembly 14 comprises a driving motor 141 and a speed reducer 142, the speed reducer 142 is arranged below the lower end cover 104, and the driving motor 141 drives the rotation of the rotating hollow shaft 11 through the speed reducer 142;

[0038] The plurality of rotating disc ceramic membranes 12 are arranged in parallel and sealed on the rotating hollow shaft 11, the inner cavity of the rotating hollow shaft 11 is communicated with the internal flow channels of the plurality of rotating disc ceramic membranes 12, the intermediate sealing members 121 are arranged between adjacent rotating disc ceramic membranes 12, and the end sealing members 122 are arranged at both ends of the rotating disc ceramic membranes 12; the lower end of the rotating hollow shaft 11 is communicated with a water production electric valve 111 through a rotating joint 110;

[0039] The spraying assembly 13 comprises a spraying main pipe 131 and a plurality of spraying heads 132 arranged in sequence along the length direction of the spraying main pipe 131, and one spraying head 132 corresponds to the gap between adjacent rotating disc ceramic membranes 12;

[0040] The material conveying unit 2 comprises a material tank 20 and a material conveying pump 21 which are communicated in sequence;

[0041] The backwashing water supplementing unit 3 comprises a backwashing water supplementing tank 30 filled with RO reverse osmosis water production and a backwashing water supplementing pump 31 which are communicated in sequence;

[0042] The water production unit 4 comprises a water production vacuum pump 41 and a water production storage tank 40 which are communicated in sequence;

[0043] The filter residue storage unit 5 comprises a filter residue storage tank 50;

[0044] In the two rotating disc ceramic membrane units 1, the overflow port 102 of one rotating disc ceramic membrane unit 1 is communicated with the feed inlet 101 of the other rotating disc ceramic membrane unit 1, so as to realize the series connection of the two rotating disc ceramic membrane units 1;

[0045] In the material conveying unit 2, the material tank 20 is communicated with the material conveying pump 21 through a material conveying first manual ball valve 201, the material conveying pump 21 is communicated with the feed inlet 101 of the first rotating disc ceramic membrane unit 1 in sequence through a raw material check valve 211, a material conveying second manual ball valve 212 and a raw material electric ball valve 213, and the outlet of the raw material electric ball valve 213 is further provided with a first manual blowdown valve 214, so that when the equipment fails, the first manual blowdown valve 214 can be used for emergency emptying and equipment maintenance;

[0046] In the backwashing water replenishing unit 3, the backwashing water replenishing tank 30 is communicated with the backwashing water pump 31 through a backwashing water replenishing first manual ball valve 301, the backwashing water pump 31 is communicated with the rotating hollow shaft 11 of the second rotary disc ceramic membrane unit 1 in turn through a backwashing water replenishing check valve 311, a backwashing water replenishing second manual ball valve 312, a backwashing water replenishing second electric ball valve 313 and a backwashing water replenishing second manual ball valve 314, and is communicated with the spraying assembly 13 of the second rotary disc ceramic membrane unit 1 in turn through the backwashing water replenishing check valve 311, the backwashing water replenishing second manual ball valve 312, a backwashing water replenishing second electric ball valve 315 and a backwashing water replenishing second manual ball valve 316, in the process of suction, the backwashing water replenishing pump 31 is opened, the RO reverse osmosis water is pressurized and sprayed out in turn through the spraying main pipe 131 and the spraying head 132, so as to effectively slow down the pollution of the rotary disc ceramic membrane 12; the outlet of the backwashing water replenishing second manual ball valve 312 is also provided with a second manual blowdown valve 317, so that the equipment can be emptied through the second manual blowdown valve 317 in emergency when the equipment fails, and the equipment is maintained;

[0047] The rotating hollow shaft 11 of the second rotary disc ceramic membrane unit 1 is communicated with the water production tank 40 and the water production vacuum pump 41 in turn through the above-mentioned backwashing water replenishing second manual ball valve 314 and a water production second electric ball valve 111; the water production vacuum pump 41 is communicated with the water production tank 40 in turn through a water production check valve 411 and a water production manual ball valve 412.

[0048] The overflow port 102 of the last rotary disc ceramic membrane unit 1 is communicated with the residue storage tank 50 through a residue discharge proportional regulating valve 501;

[0049] When the water is produced normally, the residue discharge proportional regulating valve 501 is closed, the backwashing water replenishing second electric ball valve 313 is closed, the raw material enters the membrane unit cavity 10 through the material conveying unit 2, then enters another membrane unit cavity 10 from the overflow port 102 through the overflow valve 1021, and then enters the residue discharge proportional regulating valve 501 from the overflow port 102 through the overflow valve 1021, according to the concentration of the concentrated solution at the residue discharge proportional regulating valve 501, the opening degree of the residue discharge proportional regulating valve 501 is adjusted, and the concentrated solution and the residue are discharged into the residue storage tank 50.

[0050] The water in the backwashing water replenishing tank 30 is sprayed to the surface of the rotary disc ceramic membrane 12 through the backwashing water replenishing unit 3, the spraying main pipe 131 and the spraying head 132, the shear force is improved to wash away the mud cake and the like on the surface of the rotary disc ceramic membrane 12, the concentration of the material liquid in the membrane unit cavity 10 is reduced, the suction negative pressure is reduced, and the water production time is prolonged.

[0051] Under the action of the suction negative pressure of the water production vacuum pump 41, the dialysis fluid filtered by the rotary disc ceramic membrane 12 enters the inner cavity of the rotary hollow shaft 11, and sequentially passes through the rotary joint 110, the backwashing water replenishing second manual ball valve 312, the water production electric valve 111 to connect the inlet of the water production vacuum pump 41.

[0052] When the rotary disc ceramic membrane unit 1 is backwashed, the water production electric valve 111 and the water replenishing electric valve 315 are closed, the filter residue discharge proportional adjusting valve 501 is opened, and the backwashing electric ball valve 313 is opened, so that the backwashing water flows through the backwashing water replenishing unit 3, the backwashing electric ball valve 313, the backwashing water replenishing second manual ball valve 312, the rotary joint 110 and the rotary hollow shaft 11 to the rotary disc ceramic membrane 12, and the dirt on the surface of the rotary disc ceramic membrane 12 is washed away and discharged from the overflow port 102.

[0053] The backwashing process of the other rotary disc ceramic membrane unit 1 is consistent with that of the rotary disc ceramic membrane unit 1, and will not be repeated.

[0054] The PLC control unit is electrically connected with the above-mentioned driving assembly 14, the feed pump 21, the backwashing water replenishing pump 31, the water production vacuum pump 41, the raw material electric ball valve 213, the backwashing electric ball valve 313, the water replenishing electric valve 315, the water production electric valve 111 and the filter residue discharge proportional adjusting valve 501, and under the automatic control of the PLC control unit, the series water production of the two rotary disc ceramic membrane units 1 is realized, and the whole system continuously produces water.

[0055] The above is only a preferred embodiment of the present application, and therefore cannot limit the scope of the present application, that is, equivalent changes and modifications made according to the scope of the present application and the content of the specification should still be within the scope of the present application.

Claims

1. A continuous production washing negative pressure type rotary 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 supplement unit, a water production unit, a filter residue storage unit and a PLC control unit. The bottom of the membrane unit cavity is provided with a feed inlet, and the upper portion is provided with an overflow port which is arranged above the highest set liquid surface of the membrane unit cavity. The hollow rotating shaft penetrates through the membrane unit cavity and can rotate relative to the membrane unit cavity under the drive of the drive assembly. The feed unit comprises a feed tank and a feed pump which are sequentially connected. The backwashing water supplement unit comprises a backwashing water supplement tank containing RO reverse osmosis water production and a backwashing water supplement pump which are sequentially connected. The water production unit comprises a water production vacuum pump and a water production storage tank which are sequentially connected. The filter residue storage unit comprises a filter residue storage tank.

2. The continuous production of a washing negative pressure type rotating ceramic membrane apparatus according to claim 1, characterized in that: The overflow port of one rotating disc ceramic membrane unit is connected with the feed inlet of another rotating disc ceramic membrane unit to realize the series connection of the at least two rotating disc ceramic membrane units.

3. The continuous production of a washing negative pressure type rotating ceramic membrane apparatus according to claim 2, characterized in that: The feed pump of the feed unit is connected with the feed inlet of the first rotating disc ceramic membrane unit through a raw material check valve and a raw material electric ball valve.

4. The continuous production of a washing negative pressure type rotating ceramic membrane apparatus according to claim 2, characterized by: The backwashing water supplement pump of the backwashing water supplement unit is connected with the hollow rotating shaft of the at least two rotating disc ceramic membrane units through a backwashing water check valve and at least two backwashing electric ball valves, and is connected with the spray assemblies of the at least two rotating disc ceramic membrane units through the backwashing water check valve and at least two water supplement electric valves.

5. The continuous production of a washing negative pressure type rotating ceramic membrane apparatus according to claim 1, characterized in that: The hollow rotating shaft of the at least two rotating disc ceramic membrane units is connected with the water production vacuum pump and the water production storage tank through at least two water production electric valves. The overflow port of the last rotating disc ceramic membrane unit is connected with the filter residue storage tank through a filter residue discharge proportional regulating valve. The upper end cover is provided with an upper supporting shaft, and the lower end cover is provided with a lower supporting shaft. The upper end and the lower section of the hollow rotating shaft are arranged in the upper supporting shaft and the lower supporting shaft, respectively. The drive assembly comprises a drive motor and a speed reducer which is arranged below the lower end cover. The hollow rotating shaft is arranged in parallel with the rotating disc ceramic membranes, and the inner cavity of the hollow rotating shaft is connected with the internal flow channels of the rotating disc ceramic membranes.

6. The continuous production of a washing negative pressure type rotating ceramic membrane apparatus according to claim 5, characterized by: The intermediate sealing member is arranged between the adjacent rotating disc ceramic membranes, and the end sealing member is arranged at the both ends of the rotating disc ceramic membranes.

7. The continuous production of a washing negative pressure type rotating ceramic membrane apparatus according to claim 5, characterized by: The lower end of the rotating hollow shaft is connected with a water production electric valve through a rotating joint.

8. The continuous production of a washing negative pressure type rotating ceramic membrane apparatus according to claim 1, characterized in that: The spraying assembly comprises a spraying main pipe and a plurality of spraying heads arranged along the length direction of the spraying main pipe in sequence.

Images