CN114042381B - MBR (Membrane bioreactor) membrane intelligent conveying system and using method thereof - Google Patents

Abstract

The invention relates to the technical field of ultra-nanofiltration membranes, in particular to an MBR membrane intelligent conveying system and a using method thereof, wherein the MBR membrane intelligent conveying system comprises a stirring tank, a membrane casting machine, a gel cleaning all-in-one machine, post-treatment equipment, a dryer, a flat membrane cutting machine and an ultrasonic welding machine which are sequentially connected; aftertreatment equipment is in including immersion oil groove, rotation setting a plurality of gripper of immersion oil groove top, rotation setting are in the hold-in range, the setting of immersion oil groove one side are in basket, setting on the hold-in range are in the roof of immersion oil groove top, setting are in nozzle and drive on the roof hold-in range pivoted drive division, wherein, the nozzle with the position of basket is corresponding. According to the invention, by arranging the first motor, the support beam and the mechanical claw, the probability that the part of the workpiece clamped by the mechanical claw cannot be soaked in oil is reduced, and the oil soaking effect of the workpiece is improved.

Description

MBR (Membrane bioreactor) membrane intelligent conveying system and using method thereof

Technical Field

The invention relates to the technical field of ultra-nanofiltration membranes, in particular to an MBR membrane intelligent conveying system and a using method thereof.

Background

The ultra-nanofiltration membrane is a functional semipermeable membrane which allows solvent molecules or certain low molecular weight solvents or low valence ions to permeate, is named because the size of substances capable of being intercepted is nano-scale, and is commonly used for removing organic substances and chromaticity in surface water, removing soluble salts, separating substances in medicines and the like.

A chinese patent publication No. CN110152499A discloses a nanofiltration membrane and a method for using the nanofiltration membrane. The nanofiltration membrane comprises a polymer primary membrane, and a tannic acid layer and a polyether amine layer which are formed on the surface of the polymer primary membrane, and the using method comprises the following steps: preparing a polymer raw film; preparing a phosphate buffer solution; respectively dissolving tannic acid and polyether amine in a phosphate buffer solution to prepare a tannic acid solution and a polyether amine solution; soaking the polymer original film in a tannic acid solution, and then rinsing with deionized water for 5 min; soaking the soaked and rinsed polymer original membrane in a polyetheramine solution, and rinsing with deionized water for 5 min; repeatedly soaking the tannin and the polyether amine solution for 0-2 times; the nanofiltration membrane is prepared by carrying out reactive layer-by-layer self-assembly on tannic acid and polyether amine. The preparation process is simple, the nanofiltration membrane coating is stable in structure and high in rejection rate, and therefore the technical problems that the stability of the nanofiltration membrane is insufficient in layer-by-layer self-assembly in the prior art and the preparation process is complicated are solved.

In the super nanofiltration membrane production process, use fixture to press from both sides the edge of diaphragm tight fixed, put into the oil groove with the diaphragm and carry out the immersion oil, get rid of the moisture in the diaphragm hole to play the effect of supporting the membrane, but the position that the diaphragm was held can't contact with glycerine, leads to this position immersion oil effect relatively poor.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome one of the technical problems in the above technology, the present invention provides an MBR membrane intelligent delivery system and a method for using the same, including,

the device comprises a stirring tank, a film casting machine, a gel cleaning integrated machine, post-processing equipment, a dryer, a flat membrane cutting machine and an ultrasonic welding machine which are connected in sequence;

the post-treatment equipment comprises an oil immersion tank, a plurality of mechanical claws rotationally arranged above the oil immersion tank, a synchronous belt rotationally arranged on one side of the oil immersion tank, a basket arranged on the synchronous belt, a top plate arranged above the oil immersion tank, a nozzle arranged on the top plate and a driving part for driving the synchronous belt to rotate, wherein,

the nozzle corresponds to a position of the basket.

Furthermore, both sides of the immersion oil tank are rotatably provided with a supporting beam, a plurality of mechanical claws arranged on the supporting beam and a first motor in transmission connection with the supporting beam, wherein,

the first motor is fixedly arranged above the oil immersion tank.

Further, the driving part comprises a second motor arranged on the side wall of the immersion oil tank and a gear in transmission connection with the second motor,

the gear with synchronous belt drive is connected, just the gear is located the both ends of synchronous belt.

Furthermore, a plurality of support rods are fixed on the side surface of the synchronous belt, the support rods are rotationally connected with the baskets, wherein,

the lateral wall of the oil immersion groove is provided with a sliding groove, and the supporting rod is arranged in the sliding groove in a sliding mode.

Further, the bottom of the basket is provided with a rubber floating block, the rubber floating block is provided with a screen plate, wherein,

the rubber floating block is provided with a plurality of air cavities.

Furthermore, an equipment box is arranged on the top plate, an oil pump is arranged in the equipment box, an oil path communicated with the nozzle is arranged below the top plate, wherein,

one end of the oil pump is communicated with the oil immersion groove, and the other end of the oil pump is communicated with the oil way.

Further, the nozzle comprises a nozzle body, an oil spraying cavity arranged in the nozzle body, a connecting shaft rotatably arranged in the oil spraying cavity, turbine fan blades fixedly connected with one end of the connecting shaft, a cross rod fixedly connected with the other end of the connecting shaft, a convex ring arranged on the cross rod and blades arranged on the outer ring of the convex ring,

the oil spraying cavity is communicated with the oil way, a nozzle is arranged at one end, far away from the oil way, of the oil spraying cavity, and the nozzle corresponds to the basket in position.

Furthermore, two ring grooves are arranged on the side wall of the oil spraying cavity, bearings are fixedly arranged in the ring grooves, the inner rings of the bearings are fixedly connected with a sliding ring, wherein,

the slip ring is fixedly connected with the connecting shaft through a connecting rod.

Further, the inner wall of the mechanical claw is provided with a plurality of air bags, wherein,

and two adjacent air bags are communicated with each other.

The invention also provides a use method of the ultra-nanofiltration membrane, which comprises the following steps,

s1, preheating: pumping the dimethylacetamide into the stirring tank under a closed condition through a delivery pump arranged on the stirring tank; the stirring tank is provided with an electric heating device, and dimethyl acetamide is preheated at 50 ℃ and is kept warm for 2 hours;

s2, mixing and stirring: after the dimethylacetamide is preheated, respectively pumping the PVDF, the pore-forming agent and the modifying agent into a stirring tank by using a negative pressure pumping system of the stirring tank, heating to 55 ℃, and fully stirring by using a stirring device in the tank until the PVDF is completely dissolved in the dimethylacetamide to obtain a casting solution;

s3, flat casting: the casting solution is uniformly coated on the surface of the non-woven fabric in the film casting machine through a closed pipeline to form a resin layer with moderate thickness and uniform distribution;

s4, gel: after the film is cast, the workpiece is quickly pulled into the gel cleaning all-in-one machine, PVDF in the film casting liquid is solidified into a film when meeting water, and dimethylacetamide is dissolved in water;

s5, cleaning: the gelled workpiece is continuously pulled to a cleaning tank in the gel cleaning all-in-one machine, and is subjected to overflow rinsing by using tap water, so that a small amount of dimethylacetamide remained in membrane holes is removed, and the membrane has sufficient stability and mechanical property; the workpiece is blown dry by the gel cleaning all-in-one machine with an air knife and then enters the next working section;

s6, oil immersion: immersing the cleaned workpiece into an oil immersion tank in post-treatment equipment for oil immersion, driving a support beam to rotate by a motor, then driving a mechanical claw to rotate, clamping the cleaned workpiece by the mechanical claw, immersing the workpiece into a basket, loosening the workpiece by the mechanical claw simultaneously, floating the workpiece out of the liquid level, floating the basket to the other end under the action of a synchronous belt, and then clamping the workpiece out by the mechanical claw on the other side of the oil immersion tank; placing the membrane immersed with the oil on a frame of non-woven fabric, and airing the surface of the membrane at room temperature;

s7, drying: drying the workpiece by using a dryer, and drying the workpiece by using a heating temperature control device, wherein the energy is electricity, and the heating temperature is 50-60 ℃; taking out the dried film, sampling and soaking in deionized water for 24 hours, and then carrying out performance test;

s8, cutting: after the test is qualified, cutting the flat membrane into a proper size by using a flat membrane cutting machine;

s9, ultrasonic welding: and (3) welding the purchased resin plate and the membrane by adopting a hot-melt welding machine, and obtaining the flat membrane MBR membrane stack after welding.

Has the advantages that: 1. the invention relates to an MBR (membrane bioreactor) membrane intelligent conveying system and a using method thereof.A first motor, a supporting beam and a mechanical claw are arranged; the motor drives the supporting beam to rotate, then drives the mechanical claw to rotate, the mechanical claw clamps the cleaned workpiece and immerses the workpiece into the basket, meanwhile, the mechanical claw loosens the workpiece, the workpiece floats out of the liquid level, the basket floats to the other end under the action of the synchronous belt and then is clamped out by the mechanical claw on the other side of the immersion oil tank; the probability that the part of the workpiece clamped by the mechanical claw cannot be soaked in oil is reduced, and the oil soaking effect of the workpiece is improved.

2. According to the invention, the oil pump and the nozzle are arranged, the oil pump pumps out the glycerol in the oil immersion groove, the glycerol is filled into the oil path and is sprayed downwards through the nozzle, and the glycerol is uniformly sprayed to the top surface of the workpiece floating on the surface of the glycerol in the basket, so that the comprehensive oil immersion effect of the workpiece is further improved, and the overall quality of the workpiece is improved.

3. The invention arranges turbine fan blades, a cross bar, a convex ring and blades; glycerol passes through turbine fan blade, and drive turbine fan blade is rotatory, and spun glycerine is cut apart by the bulge loop, and partial glycerine branch flow direction middle part of bulge loop is smashed the dispersion by the horizontal pole, and remaining glycerine branch flows to the outer lane of bulge loop, is smashed the diffusion by the blade for spun glycerine is dispersion even more, has improved the homogeneity that glycerine sprayed the workpiece surface, has further improved the effect of work piece immersion oil.

Drawings

FIG. 1 is a perspective view of a first embodiment of the present invention;

FIG. 2 is a front view of a first embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is an enlarged view of a portion of FIG. 4 at C;

FIG. 6 is an enlarged view of a portion of FIG. 5 at D;

FIG. 7 is a partial cross-sectional view taken at E-E of FIG. 5;

FIG. 8 is an enlarged view of a portion of FIG. 3 at F;

FIG. 9 is another schematic view of the internal structure of the support beam of the present invention;

in the figure:

1. a first motor; 2. a support beam; 3. a gripper; 4. an oil immersion tank; 5. a second motor; 6. a gear; 7. a synchronous belt; 8. a support bar; 9. a basket; 10. a screen plate; 11. a rubber floating block; 12. a top plate; 13. an equipment box; 14. an oil pump; 15. an oil path; 17. a nozzle; 18. a connecting shaft; 19. turbine blades; 20. a cross bar; 21. a ring groove; 22. a slip ring; 23. a bearing; 24. a connecting rod; 25. a convex ring; 26. a blade; 27. an air bag; 28. and a hydraulic cylinder.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "top", "bottom", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

Example one

As shown in fig. 1 to 9, an intelligent MBR membrane conveying system comprises a stirring tank, a membrane casting machine, a gel cleaning all-in-one machine, a post-treatment device, a dryer, a flat membrane cutting machine and an ultrasonic welding machine which are sequentially connected; aftertreatment equipment includes immersion tank 4, rotates to set up a plurality of gripper 3, the rotation setting of immersion tank 4 top are in the hold-in range 7, the setting of immersion tank 4 one side are in basket 9, the setting on the hold-in range 7 are in roof 12, the setting of immersion tank 4 top are in nozzle 17 and the drive on the roof 12 hold-in range 7 pivoted drive division, wherein, nozzle 17 with the position of basket 9 is corresponding.

The immersion oil groove 4 is provided with a supporting beam 2, a plurality of mechanical claws 3 arranged on the supporting beam 2 and a motor 1 connected with the supporting beam 2 in a transmission manner, wherein the motor 1 is fixedly arranged above the immersion oil groove 4. The first motor 1 drives the support beam 2 to rotate, and then drives the mechanical claw 3 to rotate. The driving mode of the gripper 3 can be modified as follows: a hydraulic cylinder 28 is further arranged above the oil immersion tank 4, and a piston rod of the hydraulic cylinder 28 is in transmission connection with the mechanical claw 3. The hydraulic cylinder 28 drives the mechanical claw 3 to move, so that the clamping range distance of the mechanical claw 3 is increased, and a worker can conveniently adjust and clamp a workpiece.

The drive division is including setting up two 5 of motors on the 4 lateral walls of immersion oil groove and with two 5 transmission of motor are connected gear 6, wherein, gear 6 with hold-in range 7 transmission is connected, just gear 6 is located hold-in range 7's both ends. The synchronous belt 7 is meshed with the gear 6, is sleeved on the gear 6, and the gear 6 rotates, so that the synchronous belt 7 rotates.

A plurality of support rods 8 are fixed on the side faces of the synchronous belts 7, the support rods 8 are connected with the baskets 9 in a rotating mode, sliding grooves are formed in the side walls of the oil immersion grooves 4, and the support rods 8 are arranged in the sliding grooves in a sliding mode. Basket 9 sets up in the side of hold-in range 7, and the shape of spout and hold-in range 7 shape adaptation to make the bracing piece 8 on basket 9 can slide in the spout.

The bottom of the basket 9 is provided with a rubber floating block 11, the rubber floating block 11 is provided with a screen plate 10, and the rubber floating block 11 is provided with a plurality of air cavities. Basket 9 sets up in immersion oil groove 4, through the rubber floating block 11 that sets up in the bottom of basket 9 and the air cavity of seting up for basket 9 has buoyancy in immersion oil groove 4's glycerine, makes basket 9 remain vertical ascending state throughout, has improved the stability when basket 9 transports the work piece, the security when having improved the work piece transportation.

The top plate 12 is further provided with an equipment box 13, an oil pump 14 is installed in the equipment box 13, an oil path 15 communicated with the nozzle 17 is further arranged below the top plate 12, one end of the oil pump 14 is communicated with the oil immersion groove 4, and the other end of the oil pump is communicated with the oil path 15.

The nozzle 17 comprises a nozzle 17 body, an oil spraying cavity arranged in the nozzle 17 body, a connecting shaft 18 rotatably arranged in the oil spraying cavity, turbine fan blades 19 fixedly connected with one end of the connecting shaft 18, a cross rod 20 fixedly connected with the other end of the connecting shaft 18, a convex ring 25 arranged on the cross rod 20 and blades 26 arranged on the outer ring of the convex ring 25, wherein the oil spraying cavity is communicated with the oil way 15, a nozzle is arranged at one end, far away from the oil way 15, of the oil spraying cavity, and the nozzle corresponds to the basket 9 in position. A connecting shaft 18 is rotatably mounted in the middle of the nozzle 17, turbine fan blades 19 are fixedly connected to the top end of the connecting shaft 18, and a plurality of cross rods 20 are fixedly connected to the outer ring of the bottom end of the connecting shaft 18; the work piece floats on basket 9's surface, and the during operation, glycerine is spout from nozzle 17, and nozzle 17 spun power is great, through turbine fan leaf 19 for turbine fan leaf 19 is rotatory, drives connecting axle 18 and rotates, drives horizontal pole 20 and rotates, breaks up spun glycerine, makes spun glycerine disperse more evenly, thereby has improved the homogeneity that glycerine sprayed the work piece surface, has further improved the effect that the work piece soaks oil then.

Two annular grooves 21 have been seted up on the lateral wall of oil spraying chamber, equal fixed mounting has bearing 23 in the annular groove 21, the inner circle and the sliding ring 22 fixed connection of bearing 23, wherein, the sliding ring 22 through connecting rod 24 with connecting axle 18 fixed connection. During operation, connecting shaft 18 rotates, drives the sliding ring 22 rotatory along annular 21, has reduced the frictional force when sliding ring 22 rotates through bearing 23, has injectd the position of sliding ring 22 simultaneously, has reduced the probability that sliding ring 22 breaks away from in the annular 21, has improved connecting shaft 18 pivoted stability.

A plurality of air bags 27 are arranged on the inner wall of the mechanical claw, wherein two adjacent air bags 27 are communicated with each other; when the clamping device works, the mechanical claw 3 clamps a workpiece, so that the air bag 27 is contacted with the workpiece, air in the air bag 27 is diffused to the peripheral pressure reduction air bag 27 to wrap the clamping part of the workpiece, the extrusion force to the workpiece is reduced, and the damage probability of the workpiece is reduced.

Example two

In the second embodiment, an MBR membrane intelligent conveying system and a using method thereof are further provided on the basis of the first embodiment, wherein the MBR membrane intelligent conveying system is the same as the first embodiment, and details are not described here. The specific application method of the MBR membrane intelligent conveying system is as follows:

s1, preheating: pumping the dimethylacetamide into the stirring tank under a closed condition through a delivery pump arranged on the stirring tank; the stirring tank is provided with an electric heating device, and dimethyl acetamide is preheated at 50 ℃ and is kept warm for 2 hours;

s2, mixing and stirring: after the dimethylacetamide is preheated, respectively pumping the PVDF, the pore-forming agent and the modifying agent into a stirring tank by using a negative pressure pumping system of the stirring tank, heating to 55 ℃, and fully stirring by using a stirring device in the tank until the PVDF is completely dissolved in the dimethylacetamide to obtain a casting solution;

s3, flat casting: the casting solution is uniformly coated on the surface of the non-woven fabric in the film casting machine through a closed pipeline to form a resin layer with moderate thickness and uniform distribution;

s4, gel: after the film is cast, a workpiece is quickly pulled into the gel cleaning all-in-one machine, PVDF in the film casting liquid is solidified into a film when meeting water, and dimethylacetamide is dissolved in water;

s5, cleaning: the gelled workpiece is continuously drawn to a cleaning tank in the gel cleaning integrated machine, and is subjected to overflow rinsing by using tap water to remove a small amount of dimethylacetamide remained in membrane holes, so that the membrane has sufficient stability and mechanical property; the workpiece is blown dry by the gel cleaning all-in-one machine with an air knife and then enters the next working section;

s6, oil immersion: immersing a cleaned workpiece into an oil immersion tank 4 in post-treatment equipment for oil immersion, driving a support beam 2 to rotate by a motor I1, then driving a mechanical claw 3 to rotate, clamping the cleaned workpiece by the mechanical claw 3, immersing the workpiece into a basket 9, loosening the workpiece by the mechanical claw 3 at the same time, floating the workpiece out of a liquid level, leading the basket 9 to float to the other end under the action of a synchronous belt 7, and then clamping the workpiece out by the mechanical claw 3 at the other side of the oil immersion tank 4; placing the membrane immersed with the oil on a frame of non-woven fabric, and airing the surface of the membrane at room temperature;

s7, drying: drying the workpiece by using a dryer, and drying the workpiece by using a heating temperature control device, wherein the energy is electricity, and the heating temperature is 50-60 ℃; taking out the dried film, sampling, soaking in deionized water for 24 hours, and performing performance test;

s8, cutting: after the test is qualified, cutting the flat membrane into a proper size by using a flat membrane cutting machine;

s9, ultrasonic welding: welding the purchased resin plate and the membrane by adopting hot-melt welding of an ultrasonic welding machine, and obtaining a flat membrane MBR membrane stack after welding;

s10: cutting: cutting purchased stainless steel to generate a small amount of leftover materials in the cutting process;

s11: welding: simply welding the processed stainless steel to manufacture the required structural member; the welding adopts gas shielded welding and argon arc welding, and welding smoke and waste welding slag are generated in the welding process;

s12: and (3) integral assembly: and integrally assembling an external frame, hardware, standard fittings, the processed membrane module and the processed structural member.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (3)

1. An MBR membrane intelligent conveying system is characterized by comprising a stirring tank, a membrane casting machine, a gel cleaning all-in-one machine, aftertreatment equipment, a dryer, a flat membrane cutting machine and an ultrasonic welding machine which are sequentially connected; the post-treatment equipment comprises an oil immersion tank, a plurality of mechanical claws rotationally arranged above the oil immersion tank, a synchronous belt rotationally arranged on one side of the oil immersion tank, a basket arranged on the synchronous belt, a top plate arranged above the oil immersion tank, a nozzle arranged on the top plate and a driving part for driving the synchronous belt to rotate, wherein the nozzle corresponds to the basket; a supporting beam, a plurality of mechanical claws arranged on the supporting beam and a first motor in transmission connection with the supporting beam are rotatably arranged on two sides of the immersion oil tank, wherein the first motor is fixedly arranged above the immersion oil tank; the driving part comprises a second motor arranged on the side wall of the immersion oil tank and a gear in transmission connection with the second motor, wherein the gear is in transmission connection with the synchronous belt and is positioned at two ends of the synchronous belt; a plurality of support rods are fixed on the side surface of the synchronous belt, the support rods are rotatably connected with the basketry, sliding grooves are formed in the side walls of the immersion oil grooves, and the support rods are slidably arranged in the sliding grooves; the top plate is also provided with an equipment box, an oil pump is installed in the equipment box, an oil way communicated with the nozzle is also arranged below the top plate, the bottom of the basket is provided with a rubber floating block, the rubber floating block is provided with a screen plate, and the rubber floating block is provided with a plurality of air cavities; one end of the oil pump is communicated with the oil immersion groove, and the other end of the oil pump is communicated with the oil path; the nozzle comprises a nozzle body, an oil spraying cavity arranged in the nozzle body, a connecting shaft rotatably arranged in the oil spraying cavity, turbine blades fixedly connected with one end of the connecting shaft, a cross rod fixedly connected with the other end of the connecting shaft, a convex ring arranged on the cross rod and blades arranged on the outer ring of the convex ring, wherein the oil spraying cavity is communicated with the oil path, one end of the oil spraying cavity, far away from the oil path, is provided with a nozzle, and the nozzle corresponds to the basket; two annular grooves are formed in the side wall of the oil spraying cavity, bearings are fixedly mounted in the annular grooves, inner rings of the bearings are fixedly connected with the sliding ring, and the sliding ring is fixedly connected with the connecting shaft through a connecting rod.

2. The MBR membrane intelligent delivery system of claim 1, wherein a plurality of air bags are arranged on the inner wall of the mechanical claw, and two adjacent air bags are communicated with each other.

3. A use method of the MBR membrane intelligent conveying system according to any one of claims 1-2,

s1, preheating: pumping the dimethylacetamide into the stirring tank under a closed condition through a delivery pump arranged on the stirring tank; the stirring tank is provided with an electric heating device, dimethyl acetamide is preheated at 50 ℃, and the temperature is kept for 2 hours;

s2, mixing and stirring: after the dimethylacetamide is preheated, respectively pumping the PVDF, the pore-forming agent and the modifying agent into a stirring tank by using a negative pressure pumping system of the stirring tank, heating to 55 ℃, and fully stirring by using a stirring device in the tank until the PVDF is completely dissolved in the dimethylacetamide to obtain a casting solution;

s3, flat casting: the casting solution is uniformly coated on the surface of the non-woven fabric in the film casting machine through a closed pipeline to form a resin layer with moderate thickness and uniform distribution;

s4, gel: after the film is cast, the workpiece is quickly pulled into the gel cleaning all-in-one machine, PVDF in the film casting liquid is solidified into a film when meeting water, and dimethylacetamide is dissolved in water;

s5, cleaning: the gelled workpiece is continuously pulled to a cleaning tank in the gel cleaning all-in-one machine, and is subjected to overflow rinsing by using tap water, so that a small amount of dimethylacetamide remained in membrane holes is removed, and the membrane has sufficient stability and mechanical property; the workpiece is blown dry by the gel cleaning all-in-one machine with an air knife and then enters the next working section;

s6, oil immersion: immersing the cleaned workpiece into an oil immersion tank in post-treatment equipment for oil immersion, driving a support beam to rotate by a motor, then driving a mechanical claw to rotate, clamping the cleaned workpiece by the mechanical claw, immersing the workpiece into a basket, loosening the workpiece by the mechanical claw simultaneously, floating the workpiece out of the liquid level, floating the basket to the other end under the action of a synchronous belt, and then clamping the workpiece out by the mechanical claw on the other side of the oil immersion tank; placing the membrane immersed with the oil on a frame of non-woven fabric, and airing the surface of the membrane at room temperature;

s7, drying: drying the workpiece by using a dryer, and drying the workpiece by using a heating temperature control device, wherein the energy is electricity, and the heating temperature is 50-60 ℃; taking out the dried film, sampling and soaking in deionized water for 24 hours, and then carrying out performance test;

s8, cutting: after the test is qualified, cutting the flat membrane into a proper size by using a flat membrane cutting machine;

s9, ultrasonic welding: and (3) welding the purchased resin plate and the membrane by adopting a hot-melt welding machine, and obtaining the flat membrane MBR membrane stack after welding.

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