CN110668624A - Direct drinking water system - Google Patents
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- CN110668624A CN110668624A CN201911103306.9A CN201911103306A CN110668624A CN 110668624 A CN110668624 A CN 110668624A CN 201911103306 A CN201911103306 A CN 201911103306A CN 110668624 A CN110668624 A CN 110668624A
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- SVPAOOIPCBQPSP-UHFFFAOYSA-N ClC1C(=C=O)C(Cl)C(=C=O)C(Cl)C1=C=O Chemical compound ClC1C(=C=O)C(Cl)C(=C=O)C(Cl)C1=C=O SVPAOOIPCBQPSP-UHFFFAOYSA-N 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
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Images
Classifications
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- 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
-
- 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
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/66—Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
- B01D71/68—Polysulfones; Polyethersulfones
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a direct drinking water system which comprises a compressed carbon filtering device, a medium filtering device, a pressure pump, a water quality softening device, a water quality monitor, an RO membrane assembly and an ultraviolet sterilizing device which are sequentially connected. The direct drinking water system has higher water flux, and the membrane component has strong separation performance, strong pollution resistance and high water flux.
Description
Technical Field
The invention relates to the field of direct drinking water, in particular to a direct drinking water system.
Background
The direct drinking water is also called healthy running water, and refers to water which is free from pollution and degradation, meets the physiological needs of human bodies (contains beneficial mineral elements close to the human bodies), and can be directly drunk under the three conditions that the pH value is alkalescent. The method mainly adopts a separation membrane device and the like to filter, kill viruses and bacteria, filter abnormal colors, peculiar smell, residual chlorine, ozone hydrogen sulfide, bacteria, viruses and heavy metals in water, block suspended particles to improve water quality, simultaneously reserve trace elements beneficial to a human body, soften water quality by using an ion exchanger, and finally enable and mineralize the water body under the action of a high-flux RO membrane, so that the standard of directly drinking healthy water published by the world health organization is completely met.
Because the pore diameter of the RO membrane is one million (0.0001 micron) of hair, bacteria and viruses can not be seen by naked eyes, and the number of the bacteria and the viruses is 5000 times that of the hair, only water molecules and partial mineral ions can pass through (the passing ions have no beneficial loss orientation), and other impurities and heavy metals are discharged from the waste water pipe. All seawater desalination processes and spaceman wastewater recovery treatment are adopted, so the RO membrane is also called as an external high-tech 'artificial kidney'. Top-grade RO membranes are adopted for polymer filtration in the fields of medical, military and civil at home and abroad.
The RO membrane can be used for treating various domestic water, process water and industrial wastewater purification (coking water, turbid circulating water and the like), is suitable for oil-containing wastewater treatment in production and industry, industrial water treatment in water treatment industry, industrial circulating cooling water purification and high-purity process water purification, production water treatment, ultrafiltration, reverse osmosis, electrodialysis, pre-filtration before ion exchange resin, reclaimed water recycling treatment, equipment refrigeration, cooling circulating water filtration, industrial wastewater filtration and purification, and precise filtration of river water, well water, lake water and the like, but the RO membranes sold in the market at present have different defects of high cost, easy blockage and the like.
In order to solve the technical problem, the invention provides a direct drinking water system.
Disclosure of Invention
In order to solve the technical problems, the invention provides a direct drinking water system which improves the sewage treatment effect.
The invention is realized by the following technical scheme:
the utility model provides a straight drinking water system, straight drinking water system is including the compressed carbon filter equipment, medium filter equipment, force pump, water softening installation, water quality monitoring appearance, RO membrane module, the ultraviolet sterilization device who connects gradually.
Furthermore, raw water flows into the medium filtering device through the input end of the compressed carbon filtering device, then flows into the water softening device through the pressure supplemented by the pressure pump, the water quality monitor is used for measuring the water quality and transmitting the water quality to the readable system, then water flows through the RO membrane assembly, and the outlet water flows out after being sterilized by the ultraviolet sterilizing device.
Further, the RO membrane module comprises a novel RO membrane comprising hydrophobic methyltrichlorosilane disposed in series.
Further, the preparation process of the novel RO membrane is as follows:
step one, fully dissolving CSA in water to obtain a CSA solution, fully dissolving MPD in the CSA solution, adding TEA to adjust the MPD and CSA solutions to pH 10.0 to obtain a first mixed solution.
And step two, soaking the support membrane in the first mixed solution for 5 minutes, then slightly removing the redundant solution on the top surface of the support membrane, mixing Isopar G solution containing hydrophobic methyltrichlorosilane with different masses with TMC, pouring into amine saturated support membrane solvent aqueous solution, reacting for 30 seconds, and draining to form a direct drinking water system on the surface of the support membrane.
And step three, drying the obtained direct drinking water system for 10 minutes at about 80 ℃, cleaning and soaking in deionized water for storage.
Further, the mass ratio of the hydrophobic methyltrichlorosilane is 0.2-0.5 mM.
Further, the mass ratio of the hydrophobic methyltrichlorosilane is 0.5 mM.
Further, the supporting film component is selected from bisphenol A PSF, polyarylsulfone, polyethersulfone, polyimide, polyacrylonitrile, polyphenylene oxide and polyvinyl chloride.
The invention has the following beneficial effects: the direct drinking water system has excellent membrane separation performance, pollution resistance and high water flux. The high-flux strong anti-fouling RO membrane is easy to clean, can keep higher water flux after being cleaned, namely has strong anti-fouling performance and self-cleaning performance, and can be greatly recovered even if being polluted.
Drawings
FIG. 1 is a schematic view of a direct drinking water system according to the present invention;
1-compressed carbon filtering device, 2-medium filtering device, 3-pressure pump, 4-water softening device, 5-water quality monitor, 7-RO membrane component and 6-ultraviolet sterilizing device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below.
Example 1: direct drinking water system
The invention discloses a direct drinking water system which comprises a compressed carbon filtering device 1, a medium filtering device 2, a pressure pump 3, a water softening device 4, a water quality monitor 5, an RO membrane component 7 and an ultraviolet sterilizing device 6 which are connected in sequence. Raw water flows into the medium filtering device through the input end of the compressed carbon filtering device, then flows into the water softening device through the pressure pump to supplement pressure, the water quality monitor is used for measuring water quality and transmitting the water quality to the readable system, then water flows through the RO membrane assembly, and finally the outlet water flows out after being sterilized by the ultraviolet sterilizing device.
Example 2: preparation of novel RO membranes
Sources of test materials: hydrophobic methyltrichlorosilane (MeSiCl)3，MTS，>99% from Sigma-Aldrich) as precursor, L- (+) -camphorsulfonic acid (CSA,>99%, m-phenylenediamine (MPD, ≧ 99%, available from Sigma-Aldrich), Isopar G (available from Exxon Mobil) as the isoparaffinic solvent, triethylamine (TEA, ≧ 99%, available from Sigma-Aldrich), m-phenylenediamine (MPD,>99% from Sigma-Aldrich), chloroform (CHCl)399% from Sigma-Aldrich), 1,3, 5-trichlorotricarbonylbenzene (TMC, ≧ 98% from Sigma-Aldrich), bovine serum albumin (BSA, ≧ 96% from Sigma-Aldrich), sodium alginate (SA,>99% from Sigma-Aldrich), humic acid (HA,>90% from Sigma-Aldrich), polysulfone support membrane (PSF support membrane from Sigma-Aldrich).
The preparation process of the direct drinking water system is as follows: a CSA solution was obtained by completely dissolving 135mM CSA in water, after which 160mM MPD was completely dissolved in the CSA solution, and TEA was added to adjust the MPD, CSA solution to pH 10.0 to obtain a first mixed solution. The PSF supporting film was immersed in the first mixed solution for 5 minutes, and then the excess solution on the top surface of the PSF was gently removed, after which the film would contain MeSiCl of different masses3(0.0, 0.2 and 0.5mM) Isopar G solution was mixed with 0.4mM TMC, and poured into an amine-saturated PSF aqueous solution, reacted for 30 seconds, and then drained, so that a direct drinking water system was formed on the surface of the PSF-supporting membrane. And finally, drying the obtained direct drinking water system at about 80 ℃ for 10 minutes, cleaning and soaking in deionized water for storage. The obtained novel composite membranes are represented by RO-0, RO-2 and RO-5, respectivelyIn response to MeSiCl3RO membranes were loaded at 0.0, 0.2 and 0.5.
Example 3: determination of parameters
In the preparation process of the direct drinking water system, MTS reacts with amino and hydroxyl, aminolysis reaction occurs between MTS and amine, due to the reaction, the MTS is covalently connected with PA polymer, the MTS is converted into methylsilanol through water mediation, HCl released by the MTS in the reaction process changes the interfacial polymerization state, further the form and the transmission characteristic of the film are changed, organic group methyl can extend out from the PA matrix, the required function is introduced, and the methyl enables the surface energy of the polyamide film to be reduced, so that stronger hydrophobicity is realized. The non-selective gaps at the interface of MTS and PA polymers are reduced, the affinity between water and pore walls is lower, and the water permeation is accelerated.
The surface roughness of the drinking water system was measured by an Alicona roughness tester, and the results are shown in Table 1.
As can be seen from Table 1, the arithmetic mean roughness, root mean square roughness, and surface area difference are determined by MeSiCl3The loading amount is increased, the roughness has great influence on the membrane performance, the roughness is positively correlated with the effective surface area of the membrane, and the increase of the water flux is derived from the increase of the surface roughness.
Example 4: pure water desalination test flux measurement
Pure water flux and desalination tests of the membranes were tested by a cross-flow filtration system, continuously at 25 ℃, at different pressures of 5, 10, 15 and 20bar and at a cross-flow rate of 68L/h, and the membranes were stabilized at different pressures for at least 1h before testing. The desalting test was evaluated with an aqueous feed solution containing 2000ppm NaCl. Pure water flux J (L · m-2 · h-1, LMH) is calculated from J ═ V/(a × Δ t), where V is the permeation volume of the solution, a is the membrane area, and Δ t is the permeation time. The pure water permeability coefficient a (LMH/bar) was modeled by a linear fx, a ═ J/Δ P, where Δ P represents the different pressures. The test results show an increase in RO-5 membrane permeability of about 214% compared to RO-0, and do not affect water/salt selectivity. RO-2 membrane permeability was increased by about 132.5% compared to RO-0 and did not affect water/salt selectivity.
Example 5: determination of sewage flux
The sewage treatment performance of the direct drinking water system is tested, and a cross flow filtration experiment is carried out for 24 hours in artificial sewage at 5bar by using RO-0, RO-2 and RO-5 membranes. The artificial wastewater was prepared by dissolving 50ppm Bovine Serum Albumin (BSA), 50ppm Sodium Alginate (SA), 50ppm Humic Acid (HA) mixture and 2000ppm NaCl in water, and performing a 3-hour cleaning experiment with deionized water after the crossflow filtration experiment. Experimental results show that RO-0 water flux in the artificial sewage is obviously reduced, RO-2 and RO-5 show higher water flux in the artificial sewage, and the water flux of the fouling solution of the RO-0, RO-2 and RO-5 membranes is about 4.1-5.5LMH, 18.2-22.1LMH and 29.5-32.3LMH respectively.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (7)
1. The direct drinking water system is characterized by comprising a compressed carbon filtering device, a medium filtering device, a pressure pump, a water softening device, a water quality monitor, an RO membrane component and an ultraviolet sterilizing device which are sequentially connected.
2. The system as claimed in claim 1, wherein the raw water flows into the medium filtering device through the input end of the compressed carbon filtering device, then flows into the water softening device through the pressure supplemented by the pressure pump, the water quality monitor is used for measuring the water quality and transmitting the water quality to the readable system, then the water flows through the RO membrane module, and the effluent is sterilized by the ultraviolet sterilizing device and flows out.
3. The system of claim 1, wherein the RO membrane module comprises a novel RO membrane comprising hydrophobic methyltrichlorosilane disposed in series.
4. The system of claim 3, wherein the novel RO membrane is prepared as follows:
completely dissolving CSA in water to obtain a CSA solution, then completely dissolving MPD in the CSA solution, adding TEA to adjust the MPD and CSA solutions to pH 10.0 to obtain a first mixed solution;
soaking the support membrane in the first mixed solution for 5 minutes, then slightly removing redundant solution on the top surface of the support membrane, mixing Isopar G solution containing hydrophobic methyltrichlorosilane with different masses with TMC, pouring into amine saturated support membrane solvent aqueous solution, reacting for 30 seconds, and draining to form a direct drinking water system on the surface of the support membrane;
and step three, drying the obtained direct drinking water system for 10 minutes at about 80 ℃, cleaning and soaking in deionized water for storage.
5. The system of claim 3, wherein the mass ratio of the hydrophobic methyltrichlorosilane is 0.2-0.5 mM.
6. The system of claim 3, wherein the mass ratio of the hydrophobic methyltrichlorosilane is 0.5 mM.
7. The system of claim 3, wherein the support membrane component is selected from the group consisting of bisphenol A PSF, polyarylsulfone, polyethersulfone, polyimide, polyacrylonitrile, polyphenylene oxide, and polyvinyl chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911103306.9A CN110668624A (en) | 2019-11-12 | 2019-11-12 | Direct drinking water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911103306.9A CN110668624A (en) | 2019-11-12 | 2019-11-12 | Direct drinking water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110668624A true CN110668624A (en) | 2020-01-10 |
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Application publication date: 20200110 |