CN112624265A - Advanced wastewater treatment device - Google Patents
Advanced wastewater treatment device Download PDFInfo
- Publication number
- CN112624265A CN112624265A CN202011338224.5A CN202011338224A CN112624265A CN 112624265 A CN112624265 A CN 112624265A CN 202011338224 A CN202011338224 A CN 202011338224A CN 112624265 A CN112624265 A CN 112624265A
- Authority
- CN
- China
- Prior art keywords
- membrane
- treatment device
- membrane unit
- wastewater treatment
- splicing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/06—Tubular membrane modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/34—Polyvinylidene fluoride
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a wastewater advanced treatment device, which comprises a treatment device body, wherein a cylindrical filtering component is vertically arranged in the treatment device body, the cylindrical filtering component divides the treatment device body into an inner purification area and an outer treatment area, the cylindrical filtering component comprises a plurality of splicing and inserting type membrane units and a membrane unit driving device, adjacent splicing and inserting type membrane units are detachably connected, the top of the treatment device body is provided with a component mounting hole, and the splicing and inserting type membrane units enter and exit the treatment device body through the component mounting hole. Compared with the prior art, the water treatment effect is good and stable, the operation and maintenance are convenient, the water quality deterioration caused by secondary pollution to a water body due to the fact that wastewater is pretreated by adopting a chemical precipitation method is avoided, when the splicing and inserting type membrane unit is replaced, the membrane driving motor drives the membrane unit guide plate to do circular motion in the treater body, so that the splicing and inserting type membrane unit is pushed to move to the position of the assembly mounting hole for quick replacement, and the composite membrane has good heavy metal particle adsorption, interception effect and acid and alkali resistance.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a wastewater advanced treatment device.
Background
With the development of economy and the improvement of the living standard of people, the demand and the day of electroplating products are greatly increased, and the wastewater contains a large amount of pollutants such as heavy metals, and if the pollutants are not treated, the pollutants are discharged at will and will seriously harm the environment and human beings, so the research on the treatment of the wastewater is a hot problem. The membrane separation technology has the functions of separation, concentration, purification and refining, and has the advantages of high efficiency, energy conservation, environmental protection, simple molecular filtration and filtration process, easy control and the like, thereby becoming one of the most important means in the current separation science. The membrane used in membrane separation technology is an inorganic or polymeric material with a specific selective separation function that separates the fluid into two separate parts, one or more of which are permeable to the membrane and the other of which are separated. The membrane separation technology which has the advantages of high efficiency, energy conservation, environmental protection, molecular level filtration, simple filtration process and easy control is known as 21 to be one of the most important industrial technologies in the century, and is a new green industrial technology.
The membrane processor in the current industry adopts a plate-frame type membrane separator, a spiral wound membrane separator and a hollow fiber type membrane separator, wherein the plate-frame type membrane separator is formed by alternately overlapping and pressing a support plate, a flat membrane and a spacing plate, and a flow channel of raw water and penetrating fluid is formed in the support plate and the spacing plate; the spiral wound membrane separator is formed by inserting a porous support material into an envelope-shaped membrane bag with three sealed sides, connecting a bag opening with a central water collecting pipe, lining with a feed liquid separation net with a flow guiding function, winding the porous support material and the feed liquid separation net together outside the central pipe into a cylinder, and filling the cylinder into a pressure-resistant cylinder, and has compact structure and large membrane area per unit volume; the hollow fiber type membrane separator is formed by arranging hollow fiber membranes in parallel, sealing the ends of the hollow fiber membranes by epoxy resin to form a tube plate and packaging the tube plate in a pressurized shell, and the hollow fiber type membrane separator has large membrane area in unit volume and can bear higher pressure difference.
The defects of the prior art are as follows: the existing plate-frame membrane separator has simple structure, poor material flow condition in the membrane component, difficult automatic washing, complex assembly and disassembly and difficult cleaning; the spiral wound membrane separator has short raw material flow, difficult circulation of concentrated materials, inconvenient cleaning and maintenance and easy blockage; the single fiber membrane of the hollow fiber type membrane separator cannot be replaced, and the whole membrane component needs to be replaced when a single fiber is damaged, so that the membrane component is easy to block; the filter membrane cannot effectively remove heavy metals in wastewater which is not pretreated.
Disclosure of Invention
In order to solve the technical problems, the invention provides a wastewater advanced treatment unit, which solves the problems of high maintenance cost, high operation energy consumption, difficult disassembly and cleaning, secondary pollution caused by wastewater pretreatment and the like of a membrane separator.
The technical scheme adopted by the invention is as follows:
the key point of the advanced wastewater treatment device is as follows: the membrane bioreactor comprises a treater body, wherein a cylindrical filtering assembly is vertically arranged in the treater body, the cylindrical filtering assembly divides the treater body into an inner purification area and an outer treatment area, the cylindrical filtering assembly comprises a plurality of splicing and inserting type membrane units and a membrane unit driving device, adjacent splicing and inserting type membrane units are detachably connected, the top of the treater body is provided with an assembly mounting hole, and the splicing and inserting type membrane units enter and exit the treater body through the assembly mounting hole;
piece together formula of inserting membrane unit and include just last steel frame mount pad and lower steel frame mount pad to setting up, go up fixedly connected with steel frame net between steel frame mount pad and the lower steel frame mount pad, steel frame net inside is equipped with the complex film, the complex film includes by modified polyvinylidene fluoride base film and modified nanometer TiO base membrane2Through interfacial polymerization; the modified nano TiO2Is nano TiO2 doped with rare earth metal, wherein the doping amount of the rare earth metal is 0.5-4 wt%; the modified polyvinylidene fluoride basal membrane is prepared from (0.5-6) by mass: 100 parts of dibenzothiazyl disulfide and polyvinylidene fluoride.
Preferably, the rare earth metal is La or Ce.
Preferably, the modified polyvinylidene fluoride-based membrane is obtained by the following method: respectively mixing the following components in volume ratio of (75-85): (8-20): putting 1 part of dimethylacetamide, polyethylene glycol and tween 80 into a reaction kettle, stirring at a high speed, adding polyvinylidene fluoride and dibenzothiazyl disulfide, stirring for 1-3h at 60-90 ℃, standing and defoaming at 40 ℃ for 12-20h to obtain a casting solution, wherein the mass fraction of polyvinylidene fluoride in the casting solution is 10-18% by weight, scraping the casting solution on a glass plate, pre-volatilizing for 5-25s, immersing the coated glass plate in distilled water, performing coagulation bath at 60-90 ℃, demolding, cleaning the surface of the membrane, soaking in deionized water for 24h, and drying to obtain the modified polyvinylidene fluoride basement membrane.
Preferably, modified nano TiO2The method comprises the following steps: putting rare earth metal salt into 0.5-2 wt% of polyethylene glycol/titanyl sulfate solution, uniformly stirring, then stirring and dropwise adding ammonium oxalate solution at 25 ℃, reacting for 1-3h, adjusting the pH value to be neutral, heating to 70-90 ℃, continuously stirring and reacting for 1-3h to obtain titanium oxalate sol, evaporating and calcining the titanium oxalate sol to dryness and calcining to obtain the modified nano TiO2。
Preferably, the rare earth metal salt is lanthanum nitrate or cerium nitrate; the molar ratio of the ammonium oxalate to the titanyl sulfate is (1-1.5): 1.
preferably, just be equipped with annular fixing base and lower annular fixing base in the treater body, go up annular fixing base with lower annular fixing base respectively with the roof and the diapire fixed connection of treater body, go up the lower surface of annular fixing base with the upper surface of lower annular fixing base is vertical respectively to be seted up and is gone up annular groove and lower annular groove, go up steelframe mount pad and lower steelframe mount pad respectively with go up annular groove and lower annular groove sliding connection, the subassembly mounting hole with go up the annular groove intercommunication.
Preferably, the membrane unit driving device comprises a vertically arranged membrane unit guide plate and a driving motor, the driving motor is arranged at the top of the processor body, the membrane unit guide plate is arranged between any two spliced membrane units, two ends of the membrane unit guide plate are respectively inserted into the upper annular groove and the lower annular groove, a circle of guide through hole is horizontally formed in the inner wall of the upper annular fixing seat, a horizontal connecting rod is fixedly connected to the upper portion of the membrane unit guide plate, and the horizontal connecting rod penetrates out of the guide through hole and is fixedly connected with an output shaft of the driving motor.
Preferably, the upper steel frame mounting seat and the two side end faces of the membrane unit guide plate are respectively and vertically provided with a T-shaped groove and a T-shaped convex strip, the T-shaped convex strips can be inserted into the adjacent T-shaped grooves, the lower end of the membrane unit guide plate is provided with a horizontal limiting block, and the wall of the lower annular groove is provided with a corresponding limiting groove.
Preferably, the lower steel frame mounting seat comprises an inner seat and an outer seat, a return spring is clamped between the inner seat and the outer seat, the top of the inner seat is fixedly connected with the lower end of the steel frame net, and the inner seat is movably arranged in the outer seat in a penetrating mode.
Preferably, the treater body is provided with a water inlet and a water outlet, the water inlet is arranged in the outer treatment area, and the water outlet is arranged in the inner purification area.
Has the advantages that: compared with the prior art, the advanced wastewater treatment device provided by the invention has the advantages of good and stable treatment effect and convenience in operation and maintenance, and avoids water quality deterioration caused by secondary pollution to a water body due to the adoption of a chemical precipitation method for pretreating wastewater. The split-insert type membrane units and the membrane unit guide plates are mutually clamped into a cylindrical filtering assembly through the T-shaped grooves and the T-shaped convex strips, when the split-insert type membrane units need to be replaced, the membrane driving motor can drive the membrane unit guide plates to do circular motion in the processor body, and therefore the split-insert type membrane units are pushed to move to the assembly mounting holes to be replaced quickly; the composite membrane has good heavy metal particle adsorption performance, interception effect and acid and alkali resistance, and by blending dibenzothiazyl disulfide into polyvinylidene fluoride, the characteristic group of dibenzothiazyl disulfide has strong complexation with heavy metal ions, so that the adsorption capacity to heavy metal ions can be improved, and modified nano TiO can be used as a catalyst2The TiO can be inhibited by doping rare earth metal2The growth of the particles can effectively improve the size and the appearance of the film particles, have higher retention rate and can effectively improve the durability of the filmAcid-base performance; rare earth metal doped TiO by interfacial polymerization2The film layer is firmly combined with the base film through chemical bonds after reacting with groups in the base film, so that the stability of the composite film and the safety and purity of a separation system are ensured, and the service life of the composite film is prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is an enlarged view of fig. 1 at a.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail below with reference to the accompanying tables and specific embodiments.
Example 1 advanced wastewater treatment apparatus I
As shown in fig. 1-3, an advanced wastewater treatment device comprises a treatment device body 1, wherein a cylindrical filter assembly is vertically arranged in the treatment device body 1, the cylindrical filter assembly divides the treatment device body 1 into an inner purification area a and an outer treatment area b, a water inlet 9 and a water outlet 10 are arranged on the treatment device body 1, the water inlet 9 is arranged in the outer treatment area b, the water outlet 10 is arranged in the inner purification area a, an upper annular fixing seat 5 and a lower annular fixing seat 6 are arranged in the treatment device body 1 in a way of facing to each other, the upper annular fixing seat 5 and the lower annular fixing seat 6 are respectively and fixedly connected with the top wall and the bottom wall of the treatment device body 1, an upper annular groove 51 and a lower annular groove 52 are respectively and vertically arranged on the lower surface of the upper annular fixing seat 5 and the upper surface of the lower annular fixing seat 6, the cylindrical filter assembly comprises a plurality of spliced membrane units 2 and a membrane unit driving device 3, the adjacent splicing and inserting type film units 2 are detachably connected, the top of the processor body 1 is provided with an assembly mounting hole 4, and the splicing and inserting type film units 2 enter and exit the processor body 1 through the assembly mounting hole 4;
piece together formula of inserting membrane unit 2 and include just to last steel frame mount pad 21 and lower steel frame mount pad 22 that sets up, go up fixedly connected with steelframe net 23 between steel frame mount pad 21 and the lower steel frame mount pad 22, go up steel frame mount pad 21 and lower steel frame mount pad 22 respectively with last annular groove 51 and lower annular groove 52 sliding connection, subassembly mounting hole 4 with go up annular groove 51 intercommunication, steel frame net 23 is inside to be equipped with complex film I.
As can be seen in fig. 1 and 2, the film unit driving device 3 includes a vertically arranged film unit guide plate 31 and a driving motor, the driving motor is arranged on the top of the processor body 1, the film unit guide plate 31 is arranged between any two of the splicing and inserting type film units 2, two ends of the film unit guide plate 31 are respectively inserted into an upper annular groove 51 and a lower annular groove 52, a circle of guide through holes 32 is horizontally arranged on the inner wall of the upper annular fixing seat 5, a horizontal connecting rod 33 is fixedly connected to the upper portion of the film unit guide plate 31, and the horizontal connecting rod 33 penetrates through the guide through holes and is fixedly connected with an output shaft of the driving motor;
go up steel frame mount pad 21 with vertically respectively on the both sides terminal surface of membrane unit deflector 31 seted up T-slot 7 and T shape sand grip 8, T shape sand grip 8 can insert in adjacent T-slot 7, the lower extreme of membrane unit deflector 31 is equipped with horizontal stopper 34, corresponding spacing groove 35 has been seted up on the cell wall of lower annular groove 52.
As can be seen from fig. 1 and 3, the lower steel frame mounting seat 22 includes an inner seat 22a and an outer seat 22b, a return spring 22c is interposed between the inner seat 22a and the outer seat 22b, the top of the inner seat 22a is fixedly connected to the lower end of the steel frame mesh 23, and the inner seat 22a is movably inserted into the outer seat 22 b.
The composite membrane I is prepared by the following method:
step one, preparing a modified polyvinylidene fluoride base film: respectively mixing the components in a volume ratio of 75: 8: putting 1 of dimethylacetamide, polyethylene glycol and tween 80 into a reaction kettle, stirring at a high speed, adding polyvinylidene fluoride and dibenzothiazyl disulfide, stirring for 1-3h at 60 ℃, standing and defoaming at 40 ℃ for 12-20h to obtain a casting solution, wherein the mass fraction of polyvinylidene fluoride in the casting solution is 10% by weight, scraping the casting solution on a glass plate, pre-volatilizing for 5s, immersing the coated glass plate into distilled water, performing coagulation bath at 60 ℃, removing the membrane, cleaning the membrane surface, soaking the membrane surface in deionized water for 24h, and drying to obtain the modified polyvinylidene fluoride basement membrane;
modified nano TiO2The preparation of (1): adding lanthanum nitrate into a polyethylene glycol/titanyl sulfate solution with the mass fraction of 0.5 wt%, uniformly stirring, and then dropwise adding an ammonium oxalate solution under stirring at 25 ℃, wherein the molar ratio of ammonium oxalate to titanyl sulfate is 1: 1, reacting for 1-3h, adjusting the pH value to be neutral, heating to 70 ℃, continuing stirring for reacting for 1-3h to obtain titanium oxalate sol, evaporating the titanium oxalate sol to dryness and calcining to obtain the modified nano TiO2Wherein the doping amount of La is 0.5% wt;
step two, the modified nano TiO prepared in the step one2Putting the mixture into a normal hexane solution of trimesoyl chloride with the mass fraction of 0.2 percent by weight, wherein the nano TiO is modified2And the mass volume ratio of the n-hexane solution of trimesoyl chloride is 0.01 g: 100ml, and obtaining the modified nano TiO by the action of ultrasonic wave for 50min with the ultrasonic power of 150W2And (3) sol.
Step three, adding triethylamine and dilute hydrochloric acid into deionized water, adjusting the pH value to 8, then adding m-phenylenediamine to prepare a m-phenylenediamine aqueous solution with the mass fraction of 0.5 wt%, uniformly coating the m-phenylenediamine aqueous solution on the modified polyvinylidene fluoride film prepared in the step one to reach saturation to form a pre-polymerization layer, and then uniformly coating the modified nano TiO prepared in the step two2And coating the sol on the pre-polymerization layer, performing interfacial polymerization reaction, and finally performing heat treatment at 100 ℃ to obtain the composite film I.
And (3) testing results: the permeation flux of the wastewater advanced treatment device reaches 318 L.m2·h-1The retention rate is 86.4 percent, and the mercury ion adsorption capacity of the composite membrane is 0.336mg/cm2。
Example 2 advanced wastewater treatment apparatus II
As shown in fig. 1-3, an advanced wastewater treatment device comprises a treatment device body 1, wherein a cylindrical filter assembly is vertically arranged in the treatment device body 1, the cylindrical filter assembly divides the treatment device body 1 into an inner purification area a and an outer treatment area b, a water inlet 9 and a water outlet 10 are arranged on the treatment device body 1, the water inlet 9 is arranged in the outer treatment area b, the water outlet 10 is arranged in the inner purification area a, an upper annular fixing seat 5 and a lower annular fixing seat 6 are arranged in the treatment device body 1 in a way of facing to each other, the upper annular fixing seat 5 and the lower annular fixing seat 6 are respectively and fixedly connected with the top wall and the bottom wall of the treatment device body 1, an upper annular groove 51 and a lower annular groove 52 are respectively and vertically arranged on the lower surface of the upper annular fixing seat 5 and the upper surface of the lower annular fixing seat 6, the cylindrical filter assembly comprises a plurality of spliced membrane units 2 and a membrane unit driving device 3, the adjacent splicing and inserting type film units 2 are detachably connected, the top of the processor body 1 is provided with an assembly mounting hole 4, and the splicing and inserting type film units 2 enter and exit the processor body 1 through the assembly mounting hole 4;
piece together formula of inserting membrane unit 2 and include just to last steel frame mount pad 21 and lower steel frame mount pad 22 that sets up, go up fixedly connected with steelframe net 23 between steel frame mount pad 21 and the lower steel frame mount pad 22, go up steel frame mount pad 21 and lower steel frame mount pad 22 respectively with last annular groove 51 and lower annular groove 52 sliding connection, subassembly mounting hole 4 with go up annular groove 51 intercommunication, steel frame net 23 inside is equipped with complex film II.
As can be seen in fig. 1 and 2, the film unit driving device 3 includes a vertically arranged film unit guide plate 31 and a driving motor, the driving motor is arranged on the top of the processor body 1, the film unit guide plate 31 is arranged between any two of the splicing and inserting type film units 2, two ends of the film unit guide plate 31 are respectively inserted into an upper annular groove 51 and a lower annular groove 52, a circle of guide through holes 32 is horizontally arranged on the inner wall of the upper annular fixing seat 5, a horizontal connecting rod 33 is fixedly connected to the upper portion of the film unit guide plate 31, and the horizontal connecting rod 33 penetrates through the guide through holes and is fixedly connected with an output shaft of the driving motor;
go up steel frame mount pad 21 with vertically respectively on the both sides terminal surface of membrane unit deflector 31 seted up T-slot 7 and T shape sand grip 8, T shape sand grip 8 can insert in adjacent T-slot 7, the lower extreme of membrane unit deflector 31 is equipped with horizontal stopper 34, corresponding spacing groove 35 has been seted up on the cell wall of lower annular groove 52.
As can be seen from fig. 1 and 3, the lower steel frame mounting seat 22 includes an inner seat 22a and an outer seat 22b, a return spring 22c is interposed between the inner seat 22a and the outer seat 22b, the top of the inner seat 22a is fixedly connected to the lower end of the steel frame mesh 23, and the inner seat 22a is movably inserted into the outer seat 22 b.
The composite membrane II is prepared by adopting the following method:
step one, preparing a modified polyvinylidene fluoride base film: respectively mixing the volume ratio of 85: 20: putting 1 of dimethylacetamide, polyethylene glycol and tween 80 into a reaction kettle, stirring at a high speed, adding polyvinylidene fluoride and dibenzothiazyl disulfide, stirring for 1-3h at 90 ℃, standing and defoaming at 40 ℃ for 12-20h to obtain a casting solution, wherein the mass fraction of polyvinylidene fluoride in the casting solution is 18% by weight, scraping the casting solution on a glass plate, pre-volatilizing for 25s, immersing the coated glass plate into distilled water, performing coagulation bath at 90 ℃, removing the membrane, cleaning the membrane surface, soaking the membrane surface in deionized water for 24h, and drying to obtain the modified polyvinylidene fluoride basement membrane;
modified nano TiO2The preparation of (1): adding cerium nitrate into a polyethylene glycol/titanyl sulfate solution with the mass fraction of 2 wt%, uniformly stirring, and then dropwise adding an ammonium oxalate solution under stirring at 25 ℃, wherein the molar ratio of ammonium oxalate to titanyl sulfate is 1.5: 1, reacting for 1-3h, adjusting the pH value to be neutral, heating to 90 ℃, continuing stirring for reacting for 1-3h to obtain titanium oxalate sol, evaporating the titanium oxalate sol to dryness and calcining to obtain the modified nano TiO2Wherein the doping amount of Ce is 4% wr;
step two, the modified nano TiO prepared in the step one2Putting the mixture into a normal hexane solution of trimesoyl chloride with the mass fraction of 1 percent by weight, wherein the nano TiO is modified2And the mass volume ratio of the n-hexane solution of trimesoyl chloride is 0.1 g: 100ml, and obtaining the modified nano TiO by the action of ultrasonic for 100min with the ultrasonic power of 150W2And (3) sol.
Adding triethylamine and dilute hydrochloric acid into deionized water, adjusting the pH value to 8, adding m-phenylenediamine to prepare a 5 wt% m-phenylenediamine aqueous solution, and adding the m-phenylenediamineUniformly coating the aqueous solution on the modified polyvinylidene fluoride film prepared in the first step to reach saturation to form a pre-polymerization layer, and then, coating the modified nano TiO prepared in the second step2And coating the sol on the pre-polymerization layer, performing interfacial polymerization reaction, and finally performing heat treatment at 150 ℃ to obtain a composite film II.
And (3) testing results: the permeation flux of the wastewater advanced treatment device reaches 296 L.m2·h-1The retention rate is 84.8 percent, and the mercury ion adsorption capacity of the composite membrane is 0.283mg/cm2。
Example 3 advanced wastewater treatment apparatus III
As shown in fig. 1-3, an advanced wastewater treatment device comprises a treatment device body 1, wherein a cylindrical filter assembly is vertically arranged in the treatment device body 1, the cylindrical filter assembly divides the treatment device body 1 into an inner purification area a and an outer treatment area b, a water inlet 9 and a water outlet 10 are arranged on the treatment device body 1, the water inlet 9 is arranged in the outer treatment area b, the water outlet 10 is arranged in the inner purification area a, an upper annular fixing seat 5 and a lower annular fixing seat 6 are arranged in the treatment device body 1 in a way of facing to each other, the upper annular fixing seat 5 and the lower annular fixing seat 6 are respectively and fixedly connected with the top wall and the bottom wall of the treatment device body 1, an upper annular groove 51 and a lower annular groove 52 are respectively and vertically arranged on the lower surface of the upper annular fixing seat 5 and the upper surface of the lower annular fixing seat 6, the cylindrical filter assembly comprises a plurality of spliced membrane units 2 and a membrane unit driving device 3, the adjacent splicing and inserting type film units 2 are detachably connected, the top of the processor body 1 is provided with an assembly mounting hole 4, and the splicing and inserting type film units 2 enter and exit the processor body 1 through the assembly mounting hole 4;
piece together formula of inserting membrane unit 2 and include just to last steel frame mount pad 21 and lower steel frame mount pad 22 that sets up, go up fixedly connected with steelframe net 23 between steel frame mount pad 21 and the lower steel frame mount pad 22, go up steel frame mount pad 21 and lower steel frame mount pad 22 respectively with last annular groove 51 and lower annular groove 52 sliding connection, subassembly mounting hole 4 with go up annular groove 51 intercommunication, steel frame net 23 is inside to be equipped with complex film III.
As can be seen in fig. 1 and 2, the film unit driving device 3 includes a vertically arranged film unit guide plate 31 and a driving motor, the driving motor is arranged on the top of the processor body 1, the film unit guide plate 31 is arranged between any two of the splicing and inserting type film units 2, two ends of the film unit guide plate 31 are respectively inserted into an upper annular groove 51 and a lower annular groove 52, a circle of guide through holes 32 is horizontally arranged on the inner wall of the upper annular fixing seat 5, a horizontal connecting rod 33 is fixedly connected to the upper portion of the film unit guide plate 31, and the horizontal connecting rod 33 penetrates through the guide through holes and is fixedly connected with an output shaft of the driving motor;
go up steel frame mount pad 21 with vertically respectively on the both sides terminal surface of membrane unit deflector 31 seted up T-slot 7 and T shape sand grip 8, T shape sand grip 8 can insert in adjacent T-slot 7, the lower extreme of membrane unit deflector 31 is equipped with horizontal stopper 34, corresponding spacing groove 35 has been seted up on the cell wall of lower annular groove 52.
As can be seen from fig. 1 and 3, the lower steel frame mounting seat 22 includes an inner seat 22a and an outer seat 22b, a return spring 22c is interposed between the inner seat 22a and the outer seat 22b, the top of the inner seat 22a is fixedly connected to the lower end of the steel frame mesh 23, and the inner seat 22a is movably inserted into the outer seat 22 b.
The composite membrane III is prepared by adopting the following method:
step one, preparing a modified polyvinylidene fluoride base film: respectively mixing the volume ratio of 80: 15: putting 1 of dimethylacetamide, polyethylene glycol and tween 80 into a reaction kettle, stirring at a high speed, adding polyvinylidene fluoride and dibenzothiazyl disulfide, stirring for 1-3h at 80 ℃, standing and defoaming at 40 ℃ for 12-20h to obtain a casting solution, wherein the mass fraction of polyvinylidene fluoride in the casting solution is 12% by weight, scraping the casting solution on a glass plate, pre-volatilizing for 10s, immersing the coated glass plate into distilled water, performing coagulation bath at 80 ℃, removing the membrane, cleaning the membrane surface, soaking the membrane surface in deionized water for 24h, and drying to obtain the modified polyvinylidene fluoride basement membrane;
modified nano TiO2The preparation of (1): adding lanthanum nitrate into a polyethylene glycol/titanyl sulfate solution with the mass fraction of 1 wt%, and stirringStirring uniformly, and then dropwise adding an ammonium oxalate solution at 25 ℃, wherein the molar ratio of ammonium oxalate to titanyl sulfate is 1.2: 1, reacting for 1-3h, adjusting the pH value to be neutral, heating to 80 ℃, continuing stirring for reacting for 1-3h to obtain titanium oxalate sol, evaporating the titanium oxalate sol to dryness and calcining to obtain the modified nano TiO2Wherein the La doping amount is 4 wt%;
step two, the modified nano TiO prepared in the step one2Putting the mixture into a normal hexane solution of trimesoyl chloride with the mass fraction of 0.8 percent by weight, wherein the nano TiO is modified2And the mass volume ratio of the n-hexane solution of trimesoyl chloride is 0.06 g: 100ml, and the ultrasonic wave is acted for 90min with the ultrasonic power of 150W to obtain the modified nano TiO2And (3) sol.
Step three, adding triethylamine and dilute hydrochloric acid into deionized water, adjusting the pH value to 8, then adding m-phenylenediamine to prepare a m-phenylenediamine aqueous solution with the mass fraction of 2.5 wt%, uniformly coating the m-phenylenediamine aqueous solution on the modified polyvinylidene fluoride film prepared in the step one to reach saturation to form a pre-polymerization layer, and then uniformly coating the modified nano TiO prepared in the step two2And coating the sol on the pre-polymerization layer, performing interfacial polymerization reaction, and finally performing heat treatment at 120 ℃ to obtain a composite film III.
And (3) testing results: the permeation flux of the wastewater advanced treatment device reaches 329 L.m2·h-1The retention rate is 87.5 percent, and the mercury ion adsorption capacity of the composite membrane is 0.358mg/cm2。
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (10)
1. An advanced wastewater treatment device is characterized in that: the membrane bioreactor comprises a treater body (1), wherein a cylindrical filtering component is vertically arranged in the treater body (1), the cylindrical filtering component divides the treater body (1) into an inner purification area (a) and an outer treatment area (b), the cylindrical filtering component comprises a plurality of splicing and inserting type membrane units (2) and a membrane unit driving device (3), adjacent splicing and inserting type membrane units (2) are detachably connected, a component mounting hole (4) is formed in the top of the treater body (1), and the splicing and inserting type membrane units (2) enter and exit the treater body (1) through the component mounting hole (4);
piece together formula of inserting membrane unit (2) including just last steelframe mount pad (21) and steelframe mount pad (22) down to setting up, go up steelframe mount pad (21) and down fixedly connected with steelframe net (23) between steelframe mount pad (22), steelframe net (23) inside is equipped with the complex film, the complex film includes by modified polyvinylidene fluoride base film and modified nanometer TiO base film2Through interfacial polymerization; the modified nano TiO2Is nano TiO2 doped with rare earth metal, wherein the doping amount of the rare earth metal is 0.5-4 wt%; the modified polyvinylidene fluoride basal membrane is prepared from (0.5-6) by mass: 100 parts of dibenzothiazyl disulfide and polyvinylidene fluoride.
2. The advanced wastewater treatment plant of claim 1, further comprising: the rare earth metal is La and Ce.
3. The advanced wastewater treatment device according to claim 1 or 2, wherein the modified polyvinylidene fluoride-based membrane is obtained by the following method: respectively mixing the following components in volume ratio of (75-85): (8-20): putting 1 part of dimethylacetamide, polyethylene glycol and tween 80 into a reaction kettle, stirring at a high speed, adding polyvinylidene fluoride and dibenzothiazyl disulfide, stirring for 1-3h at 60-90 ℃, standing and defoaming at 40 ℃ for 12-20h to obtain a casting solution, wherein the mass fraction of polyvinylidene fluoride in the casting solution is 10-18% by weight, scraping the casting solution on a glass plate, pre-volatilizing for 5-25s, immersing the coated glass plate in distilled water, performing coagulation bath at 60-90 ℃, demolding, cleaning the surface of the membrane, soaking in deionized water for 24h, and drying to obtain the modified polyvinylidene fluoride basement membrane.
4. The advanced wastewater treatment unit according to claim 3, wherein the modified nano TiO is2Adopt toThe following method is adopted to obtain: putting rare earth metal salt into 0.5-2 wt% of polyethylene glycol/titanyl sulfate solution, uniformly stirring, then stirring and dropwise adding ammonium oxalate solution at 25 ℃, reacting for 1-3h, adjusting the pH value to be neutral, heating to 70-90 ℃, continuously stirring and reacting for 1-3h to obtain titanium oxalate sol, evaporating and calcining the titanium oxalate sol to dryness and calcining to obtain the modified nano TiO2。
5. The advanced wastewater treatment plant of claim 4, further comprising: the rare earth metal salt is lanthanum nitrate and cerium nitrate; the molar ratio of the ammonium oxalate to the titanyl sulfate is (1-1.5): 1.
6. the advanced wastewater treatment plant according to any one of claims 1, 2 or 5, characterized in that: just to being equipped with annular fixing base (5) and lower annular fixing base (6) in treater body (1), go up annular fixing base (5) with down annular fixing base (6) respectively with the roof and the diapire fixed connection of treater body (1), go up the lower surface of annular fixing base (5) with the upper surface of lower annular fixing base (6) is vertical respectively and has been seted up upper ring groove (51) and lower annular groove (52), go up steelframe mount pad (21) and lower steelframe mount pad (22) respectively with upper ring groove (51) and lower annular groove (52) sliding connection, subassembly mounting hole (4) with upper ring groove (51) intercommunication.
7. The advanced wastewater treatment plant of claim 6, further comprising: membrane unit drive arrangement (3) are including membrane unit deflector (31) and the driving motor of vertical setting, driving motor sets up at treater body (1) top, membrane unit deflector (31) set up two wantonly piece together between formula membrane unit (2), the both ends of membrane unit deflector (31) are inserted respectively and are established in last ring channel (51) and lower ring channel (52), round guide through-hole (32) are seted up to the level on the inner wall of going up annular fixing base (5), the upper portion fixed connection of membrane unit deflector (31) has horizontal connecting rod (33), and this horizontal connecting rod (33) are worn out the guide through-hole with driving motor's output shaft fixed connection.
8. The advanced wastewater treatment plant of claim 7, further comprising: go up steelframe mount pad (21) with vertical T-slot (7) and T shape sand grip (8) of having seted up respectively on the both sides terminal surface of membrane unit deflector (31), T shape sand grip (8) can insert in adjacent T-slot (7), the lower extreme of membrane unit deflector (31) is equipped with horizontal stopper (34), corresponding spacing groove (35) have been seted up on the cell wall of lower annular groove (52).
9. The advanced wastewater treatment plant according to claim 7 or 8, characterized in that: the lower steel frame mounting seat (22) comprises an inner seat (22a) and an outer seat (22b), a return spring (22c) is clamped between the inner seat (22a) and the outer seat (22b), the top of the inner seat (22a) is fixedly connected with the lower end of the steel frame net (23), and the inner seat (22a) is movably arranged in the outer seat (22b) in a penetrating mode.
10. The advanced wastewater treatment plant according to any one of claims 1, 7, 8 or 9, wherein: a water inlet (9) and a water outlet (10) are formed in the treater body (1), the water inlet (9) is arranged in the outer treatment area (b), and the water outlet (10) is arranged in the inner purification area (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011338224.5A CN112624265A (en) | 2020-11-25 | 2020-11-25 | Advanced wastewater treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011338224.5A CN112624265A (en) | 2020-11-25 | 2020-11-25 | Advanced wastewater treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112624265A true CN112624265A (en) | 2021-04-09 |
Family
ID=75303846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011338224.5A Withdrawn CN112624265A (en) | 2020-11-25 | 2020-11-25 | Advanced wastewater treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112624265A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113274894A (en) * | 2021-05-12 | 2021-08-20 | 江苏绿境生态环境科技股份有限公司 | Composite membrane for advanced treatment of high-salt high-heavy metal wastewater and preparation method thereof |
| CN113929180A (en) * | 2021-05-12 | 2022-01-14 | 江苏绿境生态环境科技股份有限公司 | Advanced wastewater treatment device |
-
2020
- 2020-11-25 CN CN202011338224.5A patent/CN112624265A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113274894A (en) * | 2021-05-12 | 2021-08-20 | 江苏绿境生态环境科技股份有限公司 | Composite membrane for advanced treatment of high-salt high-heavy metal wastewater and preparation method thereof |
| CN113929180A (en) * | 2021-05-12 | 2022-01-14 | 江苏绿境生态环境科技股份有限公司 | Advanced wastewater treatment device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112624265A (en) | Advanced wastewater treatment device | |
| CN105727763A (en) | Preparation method of fluorine-containing polyamide composite nano-filtration membrane | |
| CN101721914A (en) | Hollow-fiber membrane module of additional electric field | |
| CN103657413B (en) | A kind of purification method of condensed water in high temperature | |
| CN106582295B (en) | Piezoelectric ceramic filter membrane and application device | |
| CN104524942B (en) | The method and apparatus that the collaborative liquid phase of electrodialysis purifies industrial SO 2 waste gas | |
| CN202054660U (en) | Immersed flat plate filter membrane element for membrane bioreactor | |
| CN101250011A (en) | Combined filtrating system and method for advanced treatment of dyeing wastewater | |
| CN113731190A (en) | Nano-cellulose layered self-assembled film and preparation method thereof | |
| CN110813106B (en) | MOFs modified double-layer structure composite electrospun nanofiber membrane, preparation method and application thereof in blood purification | |
| CN102489347B (en) | Powder resin desorption regeneration reactor | |
| WO2022109865A1 (en) | Wastewater deep treater | |
| CN109200825B (en) | Reverse osmosis device for treating industrial strong brine sewage | |
| CN207726776U (en) | A kind of ultrafiltration membrane | |
| CN104609596A (en) | Photovoltaic acid cleaning wastewater recycling process | |
| CN114632422A (en) | External pressure type hollow fiber nanofiltration membrane component | |
| CN114314957A (en) | Electrode for electric flocculation-fiber filtration water treatment device, electric flocculation-fiber filtration water treatment device and use method thereof | |
| CN218231987U (en) | Low-power ultrafiltration purifier | |
| CN111644072A (en) | Preparation method of ultra-low pressure reverse osmosis membrane | |
| CN113929180A (en) | Advanced wastewater treatment device | |
| CN220845675U (en) | Wastewater treatment device based on bipolar membrane electrodialysis | |
| CN205662401U (en) | Circulation water purifying equipment | |
| CN210559544U (en) | Ultrafiltration device for water treatment engineering | |
| CN215439879U (en) | Multi-section type permeable membrane water treatment device | |
| CN217650949U (en) | Hollow fiber ultrafiltration membrane filtration system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210409 |