CN116675376A - Butyl acrylate wastewater treatment equipment - Google Patents
Butyl acrylate wastewater treatment equipment Download PDFInfo
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- CN116675376A CN116675376A CN202310715955.4A CN202310715955A CN116675376A CN 116675376 A CN116675376 A CN 116675376A CN 202310715955 A CN202310715955 A CN 202310715955A CN 116675376 A CN116675376 A CN 116675376A
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- membrane
- cationic membrane
- woven fabric
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- butyl acrylate
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- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 12
- 239000012528 membrane Substances 0.000 claims abstract description 196
- 125000002091 cationic group Chemical group 0.000 claims abstract description 101
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 239000002351 wastewater Substances 0.000 claims abstract description 39
- 238000000502 dialysis Methods 0.000 claims abstract description 38
- 230000001105 regulatory effect Effects 0.000 claims abstract description 37
- 239000012267 brine Substances 0.000 claims abstract description 10
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 10
- 239000004745 nonwoven fabric Substances 0.000 claims description 60
- 230000001070 adhesive effect Effects 0.000 claims description 32
- 239000000853 adhesive Substances 0.000 claims description 31
- 150000001768 cations Chemical class 0.000 claims description 30
- 239000000243 solution Substances 0.000 claims description 15
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 10
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 9
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 7
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 7
- 239000007853 buffer solution Substances 0.000 claims description 7
- 235000010413 sodium alginate Nutrition 0.000 claims description 7
- 229940005550 sodium alginate Drugs 0.000 claims description 7
- 239000000661 sodium alginate Substances 0.000 claims description 7
- 150000001408 amides Chemical class 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000003085 diluting agent Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 238000011033 desalting Methods 0.000 claims description 3
- 239000002048 multi walled nanotube Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 229910001415 sodium ion Inorganic materials 0.000 description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 11
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 8
- 238000005341 cation exchange Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 7
- 229920001690 polydopamine Polymers 0.000 description 7
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 6
- MHUWZNTUIIFHAS-CLFAGFIQSA-N dioleoyl phosphatidic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(COP(O)(O)=O)OC(=O)CCCCCCC\C=C/CCCCCCCC MHUWZNTUIIFHAS-CLFAGFIQSA-N 0.000 description 6
- 229940047670 sodium acrylate Drugs 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- WTDRDQBEARUVNC-UHFFFAOYSA-N L-Dopa Natural products OC(=O)C(N)CC1=CC=C(O)C(O)=C1 WTDRDQBEARUVNC-UHFFFAOYSA-N 0.000 description 4
- 239000000872 buffer Substances 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- 229960004502 levodopa Drugs 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 3
- 239000003377 acid catalyst Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000002306 biochemical method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- KKVTYAVXTDIPAP-UHFFFAOYSA-M sodium;methanesulfonate Chemical compound [Na+].CS([O-])(=O)=O KKVTYAVXTDIPAP-UHFFFAOYSA-M 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000006845 Michael addition reaction Methods 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229960003638 dopamine Drugs 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/38—Polymers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The application relates to butyl acrylate wastewater treatment equipment, which comprises a filter, a concentration device and a cationic membrane device which are sequentially connected, wherein the cationic membrane device comprises a dialysis tank for separating strong brine, a cationic membrane is arranged in the dialysis tank, the dialysis tank is divided into an anode tank and a cathode tank by the cationic membrane, a first regulating mechanism and a second regulating mechanism are arranged in the dialysis tank, and the cationic membrane is slidably connected with the dialysis tank through the first regulating mechanism and the second regulating mechanism; the first regulating mechanism and the second regulating mechanism are connected with the cationic membrane at staggered intervals, and the cationic membrane can be regulated to 3 stages through the first regulating mechanism and the second regulating mechanism. The application has the effect of improving the efficiency of the butyl acrylate wastewater treatment equipment for wastewater.
Description
Technical Field
The application relates to the field of wastewater treatment, in particular to treatment equipment for butyl acrylate wastewater.
Background
The current industrial process for the production of butyl acrylate is the acid alcohol esterification process, i.e. the normal product. The current industrial process for producing butyl acrylate is an acid alcohol esterification method, namely, n-butyl alcohol and acrylic acid are catalyzed by an acid catalyst to produce butyl acrylate, and the industrially used catalyst is generally p-toluenesulfonic acid. The production wastewater of butyl acrylate mainly comprises two parts of sources, namely wastewater generated when butyl acrylate is generated by esterification reaction of n-butyl alcohol and acrylic acid, and wastewater generated when the neutralization tower is used for neutralizing and washing residual acid catalyst, acrylic acid and polymerization inhibitor in crude ester. The wastewater has complex composition, and sodium paratoluenesulfonate and sodium acrylate are main pollutants.
At present, commonly established industrial treatment methods of the wastewater include a biochemical method, an incineration method, a membrane separation method, an adsorption method and the like.
For the biochemical method, the butyl acrylate wastewater has high salt content and large alkalinity, and sodium acrylate has certain toxicity to bacteria. Hydrochloric acid is generally used for adjusting the pH value of butyl acrylate wastewater to 6.5-7.5, and a large amount of clear water is used for dilution, so that the conductivity of the wastewater is less than 5000 mu s/cm, and the requirement of biological treatment is met. Thus, the useful resources such as acrylic acid, sodium hydroxide and the like in the butyl acrylate wastewater are completely lost, and the biological treatment process is very unstable, so that the normal operation of the device is seriously influenced.
In the incineration method, since a large amount of fuel is consumed for incineration, the cost is relatively high, and resources such as acrylic acid and sodium hydroxide in the wastewater cannot be utilized.
For membrane separation and adsorption, the membrane separation is performed through the unique selectivity of a membrane under the action of driving force to achieve the separation purpose, while the adsorption method is performed by using a solid adsorbent (generally porous solid, such as activated carbon) to adsorb pollutants in sewage on the surface, and then desorbing the adsorption component by specific means such as solvent extraction, heating desorption or inert gas purging to achieve the purposes of separating the adsorption component from the adsorbent, enriching the adsorption component and recycling the adsorbent.
Therefore, a relatively efficient and low-cost wastewater treatment mode is the focus of research on the current butyl acrylate wastewater treatment.
Disclosure of Invention
In order to better and effectively utilize and treat butyl acrylate wastewater, the application provides treatment equipment for butyl acrylate wastewater.
The utility model provides a treatment facility of butyl acrylate waste water, includes the filter that is used for filtering butyl acrylate waste water, carries out the concentrated equipment of desalination concentration to the waste water after filtering that links gradually, and carries out the cation membrane device of electric drive separation to the strong brine that obtains after the desalination treatment, cation membrane device includes the dialysis tank that is used for separating strong brine, be provided with the cation membrane in the dialysis tank, the dialysis tank is separated into positive pole groove and negative pole groove by the cation membrane, be provided with first adjustment mechanism and second adjustment mechanism in the dialysis tank, the cation membrane passes through first adjustment mechanism and second adjustment mechanism and links firmly with the dialysis tank in a sliding way;
the first regulating mechanism and the second regulating mechanism are connected with the cationic membrane at staggered intervals, and the cationic membrane can be regulated into 3 stages through the first regulating mechanism and the second regulating mechanism:
and a stage: the first adjusting mechanism is fixed, and the second adjusting mechanism moves towards the anode groove, so that the cationic membrane is adjusted from an initial flat state to a wavy shape protruding towards one side of the anode groove;
b, stage: the second adjusting mechanism is fixed, and the first adjusting mechanism moves towards the direction of the anode groove, so that the cationic membrane is adjusted from a wavy state to a flat state far away from the initial position;
and c, stage: the first regulating mechanism and the second regulating mechanism move towards the cathode groove simultaneously, so that the cationic membrane returns to the initial flat state.
The production wastewater of butyl acrylate mainly comprises two parts of sources, namely wastewater generated when butyl acrylate is generated by esterification reaction of n-butyl alcohol and acrylic acid, and wastewater generated when the neutralization tower is used for neutralizing and washing residual acid catalyst, acrylic acid and polymerization inhibitor in crude ester. The wastewater has complex composition, and sodium paratoluenesulfonate and sodium acrylate are main pollutants. According to the butyl acrylate wastewater treatment equipment disclosed by the application, some solid impurities in wastewater are removed through a filter, so that sodium toluenesulfonate and sodium acrylate mainly remain in the wastewater, and then the wastewater is concentrated into strong brine through a concentrating device so as to be supplied to a next-step cationic membrane device for effectively and rapidly separating out acrylic acid and sodium hydroxide for recycling.
Next, the anode tank of the cationic membrane device of the present application is used for injecting concentrated wastewater, and the cathode tank is used for injecting desalted water. When the power supply is started, sodium ions in the anode tank can enter the cathode tank through the cationic membrane, and hydroxide ions, acrylic acid radical ions and the like in water are not allowed to pass through the exchange, so that the two-pole products can be isolated, and the effect of respectively recovering acrylic acid and sodium hydroxide is achieved.
The anode film in the cation film device of the application can control the periodicity of the anode film to change the phase a, the phase b and the phase c, so that the film passing efficiency of sodium ions is greatly improved. After the cationic membrane is maintained for a period of time in an initial state, sodium ions move from one side of the anode tank to one side of the cathode tank under the action of electric driving force and concentration difference driving force, and the concentration of the sodium ions on one side of the cationic membrane close to the cathode tank is gradually increased. Then, the cationic membrane is controlled to enter the stage a through the first regulating mechanism and the second regulating mechanism, and the cationic membrane protrudes to one side of the anode groove to form a wave shape; in the stage a, the volume of the cathode groove is enlarged, and the movement of the cationic film at the convex part is equivalent to the acceleration of the speed of sodium ions on one side of the anode groove passing through the cationic film, so that the film passing speed of the sodium ions is indirectly improved in the stage a. When the cationic membrane is wavy, the surface area of the cationic membrane is increased, and sodium ions can enter one side of the cathode groove through more sodium ions in unit time under the same electric driving force; therefore, after the cationic membrane is maintained in a wavy state for a period of time, the sodium ion concentration of the side of the cationic membrane, which is close to the cathode tank, is obviously increased. The cationic membrane then goes to stage b, where it resumes its flat shape, but its position changes from the initial position. At this time, the cationic membrane is closer to the anode tank, and the higher concentration sodium ions on the side of the cationic membrane close to the cathode tank can diffuse out in the cathode tank more quickly because the leveling from the wavy shape is achieved by controlling the movement of the originally fixed second adjusting mechanism. In this case, the surface area of the cation membrane is the same as that of the cation membrane at the initial position, so that the flux of the cation passing through the membrane is reduced, and the diffusion of sodium ions on the side of the cation membrane close to the cathode tank is facilitated. After a period of time, stage c is entered, allowing the cationic membrane to slowly return to its original position. Thereby completing one cycle.
Through the control of the periodic a phase, b phase and c phase, the film passing efficiency of sodium ions is greatly improved, and the treatment efficiency of wastewater is improved.
Further, the first adjusting mechanism comprises a plurality of first adjusting rods, the bottom of the dialysis groove is provided with a sliding groove, the first adjusting rods are in sliding fit with the sliding groove, a first driving piece for controlling the first adjusting rods to move in the sliding groove is arranged in the sliding groove, and the first adjusting rods are provided with first guide holes for the cation membrane to slide and penetrate through; the second adjusting mechanism comprises a plurality of second adjusting rods, the bottom of the dialysis tank is provided with a sliding tank, the second adjusting rods are in sliding fit with the sliding tank, second driving pieces for controlling the second adjusting rods to move in the sliding tank are arranged in the sliding tank, and second guide holes for the cation membrane to slide and penetrate are formed in the second adjusting rods;
one end of the cationic membrane is fixedly connected with a second adjusting rod positioned on the side wall of one side of the dialysis tank, a driving device for winding the cationic membrane is arranged on the second adjusting rod positioned on the side wall of the other side of the dialysis tank, and the other end of the cationic membrane is connected with the driving device.
The first regulating member and the second regulating member can be driven respectively, and both ends of the cationic membrane are fixed on the second regulating member, so that the position of the cationic membrane does not move when the second regulating member is stopped. At this time, the cationic membrane is driven to move by the first adjusting member, so that the cationic membrane forms a wavy shape, namely enters the a stage. When the first adjusting rod moves to a position far away from the initial position, the first adjusting rod is controlled to be fixed, and the second adjusting rod moves, so that the cationic membrane enters the stage b, and finally reaches a flat state far away from the initial position. Finally, the cationic membrane returns to the initial position by controlling the first adjusting rod and the second adjusting rod to move simultaneously.
Further, the cationic membrane is provided in plurality.
Multiple cation membranes can form multiple dialysis tank units, thereby improving the sodium ion filtration efficiency.
Further, one side of the cationic membrane, which is close to the supporting membrane, and one side of the cationic membrane, which is far away from the supporting membrane, are respectively provided with a layer of screen, and the two layers of screen are tightly attached to the cationic membrane.
The two sides of the cationic membrane are respectively provided with a layer of screen mesh which is beneficial to improving the strength of the cationic membrane and avoiding the deformation of the cationic membrane when the cationic membrane is acted by tensile force. Secondly, the screen cloth has certain guiding effect, so that the effect of the solution on the cationic membrane can be better dispersed on the surface of the membrane when the cationic membrane is in a switching state, and the membrane is not easy to be greatly influenced locally.
Further, the cation membrane comprises a central exchange membrane, a screen layer and a non-woven fabric layer which are respectively and sequentially arranged on two sides of the central exchange membrane, and the central exchange membrane, the screen layer and the non-woven fabric layer are bonded through an adhesive.
Further, the adhesive comprises the following components in parts by weight:
30-40 parts of dopamine hydrochloride;
500-1000 parts of buffer solution;
30-40 parts of ammonium persulfate.
Dopamine hydrochloride contains DOPA (DOPA) groups, which have adhesive properties for various surfaces. DOPA is a group which is easy to oxidize, ortho-diquinone is generated after DOPA is oxidized, the structure is unstable and can react with active hydrogen on hydroxyl, amino or sulfhydryl, and the DOPA can also react with ortho-diquinone groups or DOPA groups with the same structure to form complex chemical bonding. Therefore, the dopamine hydrochloride can be well attached to the surfaces of the cation exchange membrane and the low-resistance non-woven fabric, and the dopamine can form polydopamine after oxidation self-polymerization, so that the low-resistance non-woven fabric and the cation exchange membrane are tightly combined together. And the polydopamine contains more hydroxyl and amino hydrophilic groups, so that the binder can not cause the problem of poor permeability of the cation exchange membrane, but can improve the circulation efficiency of the cation membrane to a certain extent.
Further, the adhesive also comprises 10-30 parts of polyethylene amide.
The polyacrylamide can accelerate the deposition process of polydopamine, so that the bonding process between the cation exchange membrane and the low-resistance non-woven fabric is faster. And secondly, a Michael addition reaction can occur between the polyvinyl amide and the polydopamine to form a polydopamine and polyvinyl amide crosslinking system, so that the bonding strength and stability are improved. In addition, the polyacrylamide can reduce the polymerization process of polydopamine, so that the bonding area is tighter, and the combination between the cation exchange membrane and the low-resistance non-woven fabric is firmer.
Further, the preparation method of the cationic membrane comprises the following steps:
step 1: preparing a central exchange membrane, a screen mesh and a non-woven fabric;
step 2: preparing an adhesive into an adhesive solution, coating one side of a central exchange membrane and one side of one piece of non-woven fabric, and sequentially attaching the central exchange membrane, the screen and the non-woven fabric together;
step 3: immersing one surface of the central exchange membrane, which is already attached to the non-woven fabric, in the adhesive diluent for 4-6 hours, taking out and washing cleanly to obtain the central exchange membrane with one side being attached to the non-woven fabric;
step 4: coating adhesive solution on one side of the central exchange membrane, which is not bonded with the non-woven fabric, and one side of the other non-woven fabric, and sequentially bonding the central exchange membrane, the screen and the non-woven fabric together;
step 5: immersing one surface of the central exchange membrane, which is attached to the non-woven fabric, in the adhesive diluent for 4-6 hours, taking out, washing and drying.
Further, the non-woven fabric is subjected to pretreatment, wherein the pretreatment is to soak the low-resistance non-woven fabric in pretreatment liquid for 1-3 hours and then dry; wherein the pretreatment liquid is sodium alginate aqueous solution with the weight percent of 0.1-0.5 percent and carboxylated multiwall carbon nanotubes with the mass ratio of the sodium alginate aqueous solution of 1:20-50.
After the low-resistance non-woven fabric impregnated by sodium alginate is dried, the surface of the non-woven fabric is higher in density and mechanical strength. And the surface is smoother. The low-resistance non-woven fabric is compounded, so that the resistivity of the cationic membrane is greatly reduced, and the conductivity is improved, thereby improving the cation exchange capacity of the cationic membrane.
Further, the thickness of the cationic membrane is 100-300 um.
In summary, the application has the following effects:
1. the cationic membrane device of the application controls the anode membrane to periodically perform the transformation of the a stage, the b stage and the c stage, so that the membrane passing efficiency of sodium ions is greatly improved, and the treatment efficiency of wastewater is improved.
2. The composite cation membrane is obtained by matching the non-woven fabric, the screen mesh and the central exchange membrane with the binder, so that the toughness, the strength and the conductivity of the cation exchange membrane are improved, sodium ions can more easily pass through the cation membrane, and the ion exchange efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a cationic membrane device in stage a.
Fig. 2 is a schematic structural view of the cationic membrane device in stage b.
Fig. 3 is a schematic structural view of the cationic membrane apparatus in stage c.
Reference numerals illustrate: 1. a cationic membrane device; 2. a dialysis tank; 3. a cationic membrane; 4. a first adjustment mechanism; 41. a first adjusting lever; 42. a sliding groove; 43. a first driving member; 44. a first guide hole; 5. a second adjustment mechanism; 51. a second adjusting lever; 52. a second driving member; 53. a second guide hole; 54. a driving device.
Detailed Description
The present application will be described in further detail with reference to examples.
Example 1
A treatment device for butyl acrylate wastewater comprises a filter for filtering insoluble impurities such as fixed impurities in butyl acrylate wastewater, a concentrating device for desalting and concentrating the filtered wastewater, and a cationic membrane device 1 for separating concentrated brine by an electrically driven cationic membrane 3. The concentration equipment adopts an electric driven ion membrane device, and under the action of an externally applied direct current electric field, sodium acrylate and sodium methylsulfonate in butyl acrylate wastewater are concentrated by utilizing the selective permeability of the electric driven ion membrane. The filter, the concentration equipment and the cationic membrane device 1 are connected in sequence, filtered water of the filter is introduced into a fresh water chamber of the concentration equipment, concentrated brine rich in sodium acrylate and sodium methylsulfonate is obtained after selective permeation through the ionic membrane, the concentrated brine is discharged into the cationic membrane device 1, sodium ions enter a cathode region from an anode region, so that acrylic acid is obtained in the anode region, and sodium hydroxide is obtained in the cathode region.
The cation membrane device 1 comprises a dialysis tank 2 for separating strong brine, a cation membrane 3 is arranged in the dialysis tank 2, the dialysis tank 2 is divided into an anode tank and a cathode tank by the cation membrane 3, a first regulating mechanism 4 and a second regulating mechanism 5 are arranged in the dialysis tank 2, and the cation membrane 3 is slidably connected with the dialysis tank 2 through the first regulating mechanism 4 and the second regulating mechanism 5.
The first adjusting mechanism 4 comprises a plurality of columnar first adjusting rods 41 vertically arranged in the dialysis tank 2, sliding grooves 42 corresponding to the first adjusting rods 41 are respectively formed in the top wall and the bottom wall of the dialysis tank 2, two ends of each first adjusting rod 41 are respectively in sliding fit with the two sliding grooves 42, a first driving piece 43 for controlling the first adjusting rods 41 to move in the sliding grooves 42 is arranged in each sliding groove 42, and the first driving piece 43 can be a movable device such as an air cylinder or a hydraulic cylinder. The first adjusting lever 41 is provided with a first guide hole 44 for penetrating the cationic membrane 3 along the longitudinal direction of the first adjusting lever 41.
The second adjusting mechanism 5 comprises a plurality of columnar second adjusting rods 51 vertically arranged in the dialysis tank 2, and the second adjusting rods 51 and the first adjusting rods 41 are arranged at intervals in a staggered manner. The top wall and the bottom wall of the dialysis tank 2 are respectively provided with a sliding groove 42 corresponding to the second adjusting rod 51, two ends of the second adjusting rod 51 are respectively in sliding fit with the two sliding grooves 42, a second driving piece 52 for controlling the second adjusting rod 51 to move in the sliding grooves 42 is arranged in the sliding grooves 42, and the second driving piece 52 can be a movable device such as an air cylinder or a hydraulic cylinder. The second adjusting rod 51 is provided with a second guide hole 53 for penetrating the cationic membrane 3.
The number of the second adjusting rods 51 is 1 more than that of the first adjusting rods 41, so that two ends of the dialysis tank 2 are respectively in sliding fit with one second adjusting rod 51. One end of the cation membrane 3 is fixedly connected with a second adjusting rod 51 positioned on one side wall of the dialysis tank 2, a driving device 54 for winding the cation membrane 3 is arranged on the second adjusting rod 51 positioned on the other side wall of the dialysis tank 2, and the other end of the cation membrane 3 is connected with the driving device 54. The driving device 54 is a winding roller driven by a motor, and controls the length of the cationic membrane 3 by controlling the forward rotation and reverse rotation of the motor.
The cationic membrane 3 can be adjusted to 3 stages by the first adjusting mechanism 4 and the second adjusting mechanism 5:
and a stage: the first adjusting mechanism 4 is fixed, and the second adjusting mechanism 5 moves towards the anode groove, so that the cationic membrane 3 is adjusted to be in a wavy shape protruding towards one side of the anode groove from an initial flat state;
b, stage: the second adjusting mechanism 5 is fixed, and the first adjusting mechanism 4 moves towards the direction of the anode groove, so that the cationic membrane 3 is adjusted from a wavy state to a flat state far away from the initial position;
and c, stage: the first adjusting mechanism 4 and the second adjusting mechanism 5 are simultaneously moved in the direction of the cathode tank so that the cationic membrane 3 returns to the original flat state.
The cation membrane 3 of this example was a type II homogeneous ion exchange membrane of Fuji corporation, japan, and had a thickness of 200. Mu.m.
Example 2
The difference from example 1 is that the cationic membrane comprises a central exchange membrane, a mesh layer and a non-woven fabric layer which are respectively and sequentially arranged at both sides of the central exchange membrane, and the central exchange membrane, the mesh layer and the non-woven fabric layer are bonded by an acrylic resin adhesive.
Example 3
The difference from example 1 is that the cationic membrane comprises a central exchange membrane, a mesh layer and a non-woven fabric layer which are respectively and sequentially arranged at both sides of the central exchange membrane, and the central exchange membrane, the mesh layer and the non-woven fabric layer are bonded by an adhesive.
The adhesive comprises the following components in parts by weight: 30-40 parts of dopamine hydrochloride, 500-1000 parts of buffer solution and 30-40 parts of ammonium persulfate. The buffer was Tris-Cl buffer (ph=8.5). Three samples of the adhesive of example 3 were prepared in different proportions, samples a, b, c, d, e, respectively.
| Group of | Dopamine hydrochloride | Buffer solution | Ammonium persulfate |
| Sample a | 30 | 500 | 30 |
| Sample b | 35 | 700 | 35 |
| Sample c | 40 | 1000 | 40 |
| Sample d | 20 | 400 | 20 |
| Sample e | 60 | 1200 | 50 |
The preparation method of the cationic membrane comprises the following steps:
step 1: preparing a central exchange membrane, a screen mesh and a non-woven fabric;
step 2: uniformly mixing dopamine hydrochloride with a buffer solution, adding ammonium persulfate, uniformly mixing to obtain an adhesive solution, coating one side of a central exchange membrane and one side of one piece of non-woven fabric, and sequentially attaching the central exchange membrane, a screen and the non-woven fabric together;
step 3: immersing one surface of the central exchange membrane, which is already attached to the non-woven fabric, in an adhesive solution, soaking for 6 hours, taking out and washing cleanly to obtain the central exchange membrane with one side being attached to the non-woven fabric;
step 4: coating adhesive solution on one side of the central exchange membrane, which is not bonded with the non-woven fabric, and one side of the other non-woven fabric, and sequentially bonding the central exchange membrane, the screen and the non-woven fabric together;
step 5: immersing one surface of the central exchange membrane, which is attached to the non-woven fabric, in the adhesive diluent, soaking for 6 hours, taking out, washing and drying.
Example 4
The difference from example 3 is that the adhesive is prepared from the following components in parts by weight: 30-40 parts of dopamine hydrochloride, 500-1000 parts of buffer solution, 30-40 parts of ammonium persulfate and 10-30 parts of polyvinyl amide. The buffer was Tris-Cl buffer (ph=8.5). The adhesive of example 4 was prepared in three different proportions as samples a, b, c, d, e, respectively.
The preparation method of the cationic membrane comprises the following steps:
step 1: preparing a central exchange membrane, a screen mesh and a non-woven fabric;
step 2: uniformly mixing dopamine hydrochloride with a buffer solution, adding ammonium persulfate and polyethyleneimine, uniformly mixing to obtain an adhesive solution, coating one side of a central exchange membrane and one side of one piece of non-woven fabric, and sequentially attaching the central exchange membrane, a screen and the non-woven fabric together;
step 3: immersing one surface of the central exchange membrane, which is already attached to the non-woven fabric, in an adhesive solution, soaking for 6 hours, taking out and washing cleanly to obtain the central exchange membrane with one side being attached to the non-woven fabric;
step 4: coating adhesive solution on one side of the central exchange membrane, which is not bonded with the non-woven fabric, and one side of the other non-woven fabric, and sequentially bonding the central exchange membrane, the screen and the non-woven fabric together;
step 5: immersing one surface of the central exchange membrane, which is attached to the non-woven fabric, in the adhesive diluent, soaking for 6 hours, taking out, washing and drying.
Example 5
The difference from example 4 is that the adhesive used in example 4 was sample c, the nonwoven fabric was pretreated by immersing the low-resistance nonwoven fabric in the pretreatment liquid for 3 hours and then dried; wherein the pretreatment solution is 0.5wt% sodium alginate aqueous solution and carboxylated multiwall carbon nanotubes with the mass ratio of the sodium alginate aqueous solution being 1:50.
Example 6
The difference from example 5 is that the cationic membrane has a thickness of 300um.
Comparative example 1
The difference from example 1 is that the cationic membrane 3 in the cationic membrane device 1 is vertically and flatly fixed in the dialysis tank 2.
Performance detection
Sodium ion flux test
The electrically driven cationic membrane device in the application is scaled down to obtain a device with anode grooves and cathode grooves of which the anode grooves are uniform and 14ml, wherein the anode grooves are all 0.05mol/L sodium chloride solution, the cathode grooves are 0.5mol/L sodium hydroxide solution, and the effective area of a single membrane is 7.07cm 2 The duration of the experiment was 1, the current was constant at 0.03A, and the ion content was determined by atomic absorption.
Wherein: ji is i + Ion flux, mol/(m) 2 S); v is the volume of the dilute chamber solution, 14ml; t is electrodialysis time, 120min; a is the membrane area of 7.065cm 2 。
The prepared cation membrane and the cation membrane which has been used for 3 months are washed and then the ion flux is continuously tested by the method.
Conclusion: as can be seen from the comparison between examples and comparative examples, the ion flux and durability of the cationic membrane can be improved by the state transition of the composite cationic membrane and the cationic membrane in the present application.
It can be seen from the comparison between example 1 and example 2 that the cation membrane surface is compounded with the nonwoven fabric, which is helpful to the ion flux and durability. As can be seen from the data of examples 3, 4, 5 and 6, the use of polydopamine binder and additional polyethylene amide and pretreatment of the nonwoven fabric greatly improved the ion flux and durability of the cationic membrane.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. The treatment equipment for butyl acrylate wastewater comprises a filter for filtering butyl acrylate wastewater, a concentration device for desalting and concentrating the filtered wastewater and a cationic membrane device for electrically driven separation of strong brine obtained after desalting treatment, which are sequentially connected, and is characterized in that the cationic membrane device comprises a dialysis tank for separating the strong brine, a cationic membrane is arranged in the dialysis tank, the dialysis tank is divided into an anode tank and a cathode tank by the cationic membrane, a first regulating mechanism and a second regulating mechanism are arranged in the dialysis tank, and the cationic membrane is connected with the dialysis tank in a sliding manner through the first regulating mechanism and the second regulating mechanism;
the first regulating mechanism and the second regulating mechanism are connected with the cationic membrane at staggered intervals, and the cationic membrane can be regulated into 3 stages through the first regulating mechanism and the second regulating mechanism:
and a stage: the first adjusting mechanism is fixed, and the second adjusting mechanism moves towards the anode groove, so that the cationic membrane is adjusted from an initial flat state to a wavy shape protruding towards one side of the anode groove;
b, stage: the second adjusting mechanism is fixed, and the first adjusting mechanism moves towards the direction of the anode groove, so that the cationic membrane is adjusted from a wavy state to a flat state far away from the initial position;
and c, stage: the first regulating mechanism and the second regulating mechanism move towards the cathode groove simultaneously, so that the cationic membrane returns to the initial flat state.
2. The butyl acrylate wastewater treatment device according to claim 1, wherein the first adjusting mechanism comprises a plurality of first adjusting rods, the bottom of the dialysis tank is provided with a sliding groove, the first adjusting rods are in sliding fit with the sliding groove, a first driving piece for controlling the first adjusting rods to move in the sliding groove is arranged in the sliding groove, and the first adjusting rods are provided with first guide holes for allowing the cation membranes to slide and penetrate through; the second adjusting mechanism comprises a plurality of second adjusting rods, the bottom of the dialysis tank is provided with a sliding tank, the second adjusting rods are in sliding fit with the sliding tank, second driving pieces for controlling the second adjusting rods to move in the sliding tank are arranged in the sliding tank, and second guide holes for the cation membrane to slide and penetrate are formed in the second adjusting rods;
one end of the cationic membrane is fixedly connected with a second adjusting rod positioned on the side wall of one side of the dialysis tank, a driving device for winding the cationic membrane is arranged on the second adjusting rod positioned on the side wall of the other side of the dialysis tank, and the other end of the cationic membrane is connected with the driving device.
3. The apparatus for treating butyl acrylate wastewater according to claim 1 wherein said cationic membrane is provided in plurality.
4. The butyl acrylate wastewater treatment device according to claim 1, wherein a screen is arranged on one side of the cationic membrane close to the supporting membrane and one side of the cationic membrane far away from the supporting membrane, and the two screens are closely attached to the cationic membrane.
5. The apparatus for treating wastewater of butyl acrylate according to claim 1, wherein the cationic membrane comprises a central exchange membrane, a screen layer and a non-woven fabric layer which are respectively and sequentially arranged at two sides of the central exchange membrane, and the central exchange membrane, the screen layer and the non-woven fabric layer are bonded by an adhesive.
6. The butyl acrylate wastewater treatment device according to claim 5, wherein the adhesive is prepared from the following components in parts by weight:
30-40 parts of dopamine hydrochloride;
500-1000 parts of buffer solution;
30-40 parts of ammonium persulfate.
7. The apparatus for treating wastewater of butyl acrylate according to claim 6, wherein said adhesive further comprises 10-30 parts of a polyethylene amide.
8. The butyl acrylate wastewater treatment device according to claim 7, wherein the preparation method of the cationic membrane comprises the following steps:
step 1: preparing a central exchange membrane, a screen mesh and a non-woven fabric;
step 2: preparing an adhesive into an adhesive solution, coating one side of a central exchange membrane and one side of one piece of non-woven fabric, and sequentially attaching the central exchange membrane, the screen and the non-woven fabric together;
step 3: immersing one surface of the central exchange membrane, which is already attached to the non-woven fabric, in the adhesive diluent for 4-6 hours, taking out and washing cleanly to obtain the central exchange membrane with one side being attached to the non-woven fabric;
step 4: coating adhesive solution on one side of the central exchange membrane, which is not bonded with the non-woven fabric, and one side of the other non-woven fabric, and sequentially bonding the central exchange membrane, the screen and the non-woven fabric together;
step 5: immersing one surface of the central exchange membrane, which is attached to the non-woven fabric, in the adhesive diluent for 4-6 hours, taking out, washing and drying.
9. The apparatus for treating wastewater of butyl acrylate according to claim 8, wherein the non-woven fabric is subjected to pretreatment, wherein the pretreatment is that the low-resistance non-woven fabric is soaked in a pretreatment liquid for 1-3 hours and then dried; wherein the pretreatment liquid is sodium alginate aqueous solution with the weight percent of 0.1-0.5 percent and carboxylated multiwall carbon nanotubes with the mass ratio of the sodium alginate aqueous solution of 1:20-50.
10. The apparatus for treating wastewater of butyl acrylate according to claim 5, wherein the thickness of said cationic membrane is 100-300 um.
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