CN110772999A - Preparation method of special membrane for preparing health water - Google Patents

Preparation method of special membrane for preparing health water Download PDF

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Publication number
CN110772999A
CN110772999A CN201911031002.6A CN201911031002A CN110772999A CN 110772999 A CN110772999 A CN 110772999A CN 201911031002 A CN201911031002 A CN 201911031002A CN 110772999 A CN110772999 A CN 110772999A
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water
preparing
preparation
tank
membrane
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曾凡付
秦云
钱铖
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De Blue Water Technology Ltd By Share Ltd
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De Blue Water Technology Ltd By Share Ltd
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    • 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
    • B01D67/0002—Organic membrane manufacture
    • 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
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
    • B01D67/0011—Casting solutions therefor
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a preparation method of a special membrane for preparing health water, which specifically comprises the following steps: s1, preparing a membrane casting solution, S2, preparing the special membrane for preparing the health water by a one-step forming method, and the invention relates to the technical field of drinking water purification. The preparation method of the special membrane for preparing the health water. The special membrane filament for preparing the healthy water with the specification of 0.7-1.3mm in outer diameter and 0.3-0.6mm in inner diameter is prepared by establishing a one-step forming method, compared with the traditional treatment technology, the special membrane filament for preparing the healthy water has the advantages of high separation efficiency, low energy consumption, simple process, convenience in operation and no pollution, certain substances in water are separated by filtering through pores on the surface of the membrane and utilizing the selective permeability of the membrane, the method has good selectivity, high production efficiency, simple equipment and energy conservation, has a potential application prospect in the treatment of drinking water, and after the produced membrane filament continuously runs for 720 hours, monovalent ions of the membrane filament are intercepted by more than 10%.

Description

Preparation method of special membrane for preparing health water
Technical Field
The invention relates to the technical field of drinking water purification, in particular to a preparation method of a special membrane for preparing healthy water.
Background
China is a country with water resource shortage, the per-capita occupancy is low, the water resource is relatively deficient, along with the increase of population, the water demand of human beings is close to the water resource exploitable and utilizable amount, the water shortage problem is more prominent, meanwhile, along with the rapid development of economy, the treatment of urban sewage and industrial wastewater cannot keep pace with the economic development, the untreated sewage is directly discharged into water, and the abuse of pesticides and chemical fertilizers causes the continuous deterioration of the quality of drinking water source, according to investigation, 80% of water areas in six water systems in China are polluted, 59% of water sources cannot meet III-class standards of ground water environment quality, 800 kinds of organic matters are detected in tap water, 218 kinds of organic matters are qualitatively detected, 51 kinds of organic matters are quantitatively determined, wherein the three-cause effect and the overproof function are chloroform, hexachlorobenzene, polychlorinated biphenyl, phenanthrene, anthracene, pyrene and the like, at present, China mostly adopts the traditional drinking water treatment process, although the traditional drinking water treatment process plays an important role in ensuring the quality of drinking water, the traditional drinking water treatment process cannot effectively remove trace soluble organic pollutants in source water, and a plurality of halogenated disinfection byproducts are generated in the chlorination disinfection process, so that the safety of the drinking water is threatened.
The membrane separation method is a novel separation technology, and compared with the traditional treatment technology, the membrane separation method has the characteristics of high separation efficiency, low energy consumption, simple process, convenient operation and no pollution, so that the attention of extensive researchers is paid, the membrane separation method is a method for separating certain substances in water by utilizing pores on the surface of a membrane for filtration and utilizing the selective permeability of the membrane, and the membrane separation technology has the characteristics of good selectivity, high production efficiency, simple equipment, energy conservation and the like, and has a potential application prospect in the treatment of drinking water.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of a special membrane for preparing healthy water, which solves the problems that the effluent quality of the existing drinking water is unsafe and unhealthy, and the traditional treatment technology has low separation efficiency, high energy consumption, complex process and inconvenient operation.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a preparation method of a special membrane for preparing health water specifically comprises the following steps:
s1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle for later use, wherein the materials for preparing the casting solution are all commercially available products;
s2, preparing the special membrane for preparing the health water by a one-step forming method: filling a certain amount of pure water into a coagulation bath tank, adding a water phase into an interfacial polymerization No. 1 tank, then adding an organic phase into an interfacial polymerization No. 2 tank, then adding a curing agent into the curing tank, after installing and adjusting a spinning nozzle, respectively starting a film making machine, a spinning pump and a constant flow pump, carrying out film yarn preparation at a certain discharge speed and core liquid speed, vertically feeding feed liquid into the coagulation bath tank through the spinning nozzle, then sequentially passing through the interfacial polymerization No. 1 tank, the interfacial polymerization No. 2 tank and the curing tank, and collecting the feed liquid through a winding wheel to obtain the special film for preparing the health water.
Preferably, the polymer resin powder in step S1 is any one of Polysulfone (PS), Polyethersulfone (PES), or polyvinylidene fluoride (PVDF).
Preferably, the additive in step S1 is one of absolute ethanol and tween.
Preferably, in step S1, the pore-forming agent is any one of polyethylene glycol (PEG) and polyvinylpyrrolidone (PVP).
Preferably, the water phase added in the interfacial polymerization tank No. 1 in the step S2 is a water phase with 0.9-3% of piperazine and sodium dodecyl benzene sulfonate.
Preferably, in step S2, an organic phase of the polybasic acid chloride and toluene are added to the interfacial polymerization tank No. 2 to prepare an organic phase of 1.5-4.5%.
Preferably, the curing agent in the step S2 is 2% ethyl-2-ethylacrylate.
Preferably, the apparatus for preparing health water by the one-step forming method in steps S1 and S2 comprises a feed liquid kettle, a spinning pump, a spinning nozzle, a coagulation bath, an interfacial polymerization No. 1 tank, an interfacial polymerization No. 2 tank, a solidification tank and a winding wheel.
Preferably, the bottom of the feed liquid kettle is communicated with a water inlet of a spinning pump through a liquid guide pipe, and an outlet of the spinning pump is communicated with one end of a spinning nozzle through a liquid outlet pipe.
(III) advantageous effects
The invention provides a preparation method of a special membrane for preparing health water. Compared with the prior art, the method has the following beneficial effects:
(1) the preparation method of the special membrane for preparing the healthy water prepares the special membrane filaments for preparing the healthy water with the specifications of 0.7-1.3mm of outer diameter and 0.3-0.6mm of inner diameter by establishing a one-step forming method, has high separation efficiency, low energy consumption, simple process, convenient operation and no pollution compared with the traditional treatment technology, and has good selectivity, high production efficiency, simple equipment and energy conservation, and has potential application prospect in the treatment of drinking water by utilizing the selective permeability of the membrane to separate certain substances in the water by utilizing the filtration of pores on the surface of the membrane.
(2) After the produced membrane wires continuously run for 720 hours, monovalent ions of the membrane wires are intercepted by more than 10 percent, divalent ions have interception rate of more than 90 percent and have selective permeability to the monovalent ions and the divalent ions, after the membrane wires continuously run for 720 hours, the TDS of the produced water is 120-200, the hardness of the produced water is 50-120, and the quality of the produced water belongs to healthy water.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides ten technical schemes: a preparation method of a special membrane for preparing health water specifically comprises the following embodiments:
example 1
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with 0.9 percent of the configuration of piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 2 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Example 2
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with the concentration of 1.5 percent prepared by piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 2 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Example 3
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a 2 percent water phase prepared by piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 2 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Example 4
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with 2.5 percent of piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 2 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Example 5
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with 3 percent of piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 2 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
The equipment for preparing the healthy water by the one-step forming method comprises a material liquid kettle 1, a spinning pump 2, a spinning nozzle 3, a coagulating bath 4, an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6, a solidifying groove 7 and a winding wheel 8, wherein the bottom of the material liquid kettle 1 is communicated with a water inlet of the spinning pump 2 through a liquid guide pipe, and an outlet of the spinning pump 2 is communicated with one end of the spinning nozzle 3 through a liquid outlet pipe.
Test examples 1 to 5 of the membranes for exclusive use in the preparation of healthy water, the effluent quality is shown in Table 1.
TABLE 1 test results of membranes for use in the preparation of healthy water (test temperature 25 ℃ C., run time 720h)
Figure BDA0002250136500000071
Figure BDA0002250136500000081
As can be seen from Table 1, the special membrane for preparing healthy water prepared by the invention has excellent water quality of produced water, and the NaCl retention rate is 12.5-22.95%, and MgSO 4 4The retention rate is 91.65-96.85%, the TDS of the produced water is 120-190, and the hardness of the produced water is 68-105.
Example 6
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with 2.5 percent of piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 1.5 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Example 7
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with 2.5 percent of piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 2 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Example 8
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with 2.5 percent of piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 3 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Example 9
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with 2.5 percent of piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 4 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Example 10
S1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of the N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle 1 for later use, wherein the materials for preparing the casting solution are all commercially available products, the polymer resin powder is any one of Polysulfone (PS), polyether sulfone (PES) or polyvinylidene fluoride (PVDF), the additive is any one of absolute ethyl alcohol or temperature spitting, and the pore-forming agent is any one of polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP);
s2, preparing the special membrane for preparing the health water by a one-step forming method: a certain amount of pure water is filled in a coagulating bath tank 4, a water phase is added in an interfacial polymerization No. 1 tank 5, then an organic phase is added in an interfacial polymerization No. 2 tank 6, then a curing agent is added in a curing tank 7, a film making machine, a spinning pump 2 and a constant flow pump are respectively started after a spinning nozzle 3 is installed and adjusted, the membrane yarn is prepared at a certain discharging speed and core liquid speed, the feed liquid vertically enters a coagulating bath 4 through a spinning nozzle 3, then sequentially passes through an interfacial polymerization No. 1 groove 5, an interfacial polymerization No. 2 groove 6 and a curing groove 7, is collected by a winding wheel 8, the special membrane for preparing the health water is obtained, the water phase added in the interfacial polymerization No. 1 groove 5 is a water phase with 2.5 percent of piperazine and sodium dodecyl benzene sulfonate, an organic matter with an organic phase of polybasic acyl chloride and toluene are added into a No. 2 groove 6 of interfacial polymerization to prepare a 4.5 percent organic phase, and a curing agent is 2 percent curing agent prepared by 2-ethyl acrylate.
Test examples 6 to 10 of the membranes for exclusive use in the production of healthy water showed the effluent quality as shown in Table 2.
TABLE 2 test results of membranes for healthy water preparation (test temperature 25 ℃ C., run time 720h)
Figure BDA0002250136500000111
As can be seen from Table 2, the special membrane for preparing healthy water prepared by the invention has excellent water quality of produced water, the NaCl retention rate is 11.0-25.70%, and MgSO 4 is MgSO 4The retention rate is 91.85-97.50%, the TDS of the produced water is 113-199, and the hardness of the produced water is 64-115.
To sum up the above
The invention prepares the special membrane filament for preparing the healthy water with the specification of 0.7-1.3mm of outer diameter and 0.3-0.6mm of inner diameter by establishing a one-step forming method, compared with the traditional treatment technology, the invention has the advantages of high separation efficiency, low energy consumption, simple process, convenient operation and no pollution, the method for separating certain substances in the water by utilizing the selective permeability of the membrane through filtering by utilizing the pores on the surface of the membrane has good selectivity, high production efficiency, simple equipment and energy conservation, has potential application prospect in the treatment of drinking water, the produced membrane filament intercepts univalent ions of more than 10 percent after continuously running for 720 hours, the interception rate of the bivalent ions is more than 90 percent, the selective permeability to the univalent ions and the bivalent ions, the TDS of the produced water is 120-doped 200 after continuously running for 720 hours, the hardness of the produced water is 50-120, the produced water belongs to healthy water.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. A preparation method of a special membrane for preparing health water is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, preparing a casting solution: weighing a proper amount of polymer resin powder, N-dimethylacetamide (DMAc), an additive and a pore-forming agent according to the mass fraction of 20-30% of the polymer resin powder, 60-70% of N, N-dimethylacetamide (DMAc) solvent, 1-5% of the additive and 5-9% of the pore-forming agent, and heating, dissolving and uniformly mixing the polymer resin powder, the N, N-dimethylacetamide (DMAc), the additive and the pore-forming agent in a material liquid kettle for later use;
s2, preparing the special membrane for preparing the health water by a one-step forming method: filling a certain amount of pure water into a coagulation bath tank, adding a water phase into an interfacial polymerization No. 1 tank, then adding an organic phase into an interfacial polymerization No. 2 tank, then adding a curing agent into the curing tank, after installing and adjusting a spinning nozzle, respectively starting a film making machine, a spinning pump and a constant flow pump, carrying out film yarn preparation at a certain discharge speed and core liquid speed, vertically feeding feed liquid into the coagulation bath tank through the spinning nozzle, then sequentially passing through the interfacial polymerization No. 1 tank, the interfacial polymerization No. 2 tank and the curing tank, and collecting the feed liquid through a winding wheel to obtain the special film for preparing the health water.
2. The preparation method of the special membrane for the preparation of health water as claimed in claim 1, wherein: in the step S1, the polymer resin powder is any one of polysulfone, polyethersulfone or polyvinylidene fluoride.
3. The preparation method of the special membrane for the preparation of health water as claimed in claim 1, wherein: in the step S1, the additive is one of absolute ethyl alcohol and Tween.
4. The preparation method of the special membrane for the preparation of health water as claimed in claim 1, wherein: in the step S1, the pore-forming agent is any one of polyethylene glycol or polyvinylpyrrolidone.
5. The preparation method of the special membrane for the preparation of health water as claimed in claim 1, wherein: the water phase added in the interfacial polymerization tank No. 1 in the step S2 is a water phase with 0.9-3% of piperazine and sodium dodecyl benzene sulfonate.
6. The preparation method of the special membrane for the preparation of health water as claimed in claim 1, wherein: in the step S2, an organic phase of polyacyl chloride and toluene are added to the interfacial polymerization No. 2 tank to prepare an organic phase of 1.5-4.5%.
7. The preparation method of the special membrane for the preparation of health water as claimed in claim 1, wherein: the curing agent in the step S2 is 2% curing agent prepared from 2-ethyl acrylate.
8. The preparation method of the special membrane for the preparation of health water as claimed in claim 1, wherein: the equipment for preparing the health water by the one-step forming method in the steps S1 and S2 comprises a material liquid kettle, a spinning pump, a spinning nozzle, a coagulating bath tank, an interfacial polymerization No. 1 tank, an interfacial polymerization No. 2 tank, a curing tank and a winding wheel.
9. The method for preparing a special membrane for healthy water preparation according to claim 8, wherein: the bottom of the feed liquid kettle is communicated with a water inlet of the spinning pump through a liquid guide pipe, and an outlet of the spinning pump is communicated with one end of the spinning nozzle through a liquid outlet pipe.
CN201911031002.6A 2019-10-28 2019-10-28 Preparation method of special membrane for preparing health water Pending CN110772999A (en)

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