CN115159749A - Water supply system for residents and buildings - Google Patents

Water supply system for residents and buildings Download PDF

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Publication number
CN115159749A
CN115159749A CN202210759680.XA CN202210759680A CN115159749A CN 115159749 A CN115159749 A CN 115159749A CN 202210759680 A CN202210759680 A CN 202210759680A CN 115159749 A CN115159749 A CN 115159749A
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China
Prior art keywords
water
valve
membrane
separation membrane
water tank
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CN202210759680.XA
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CN115159749B (en
Inventor
马军
张瑛洁
程喜全
王凯
宋丹
隋潇
徐美庆
张楠楠
朱彦磊
刘鹏程
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Weihai Zhijie Environmental Protection Technology Co ltd
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Weihai Zhijie Environmental Protection Technology Co ltd
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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/027—Nanofiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0079—Manufacture of membranes comprising organic and inorganic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/02—Inorganic material
    • B01D71/024—Oxides
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/34—Polyvinylidene fluoride
    • 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
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/02—Public or like main pipe systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/074—Arrangement of water treatment devices
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/08—Arrangement of draining devices, e.g. manual shut-off valves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • 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
    • Y02A20/152—Water filtration

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

Abstract

A water supply system for residents and buildings relates to the field of water treatment. The system comprises a pipe type separation membrane connected with tap water from a tap water pipe network, wherein the inlet water enters from an inner pipe; the outer sides of the tubular membranes are connected by pipelines; the downstream of the pipeline is respectively communicated with the water tank and the water tank through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of domestic water pipelines; valves are arranged on the pipeline and the household water pipeline; the water tank is positioned above the tubular separation membrane and below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank. The system of the invention has slow water outlet under the membrane and high water quality, and can meet the requirement of drinking water; the upstream flow rate of the membrane is high and low in pollution, and the requirement of domestic miscellaneous water in families, office buildings and communities is met. The invention is applied to the field of water supply of residents and buildings.

Description

Water supply system for residents and buildings
Technical Field
The invention relates to the field of water treatment, in particular to a water supply system for residents and buildings.
Background
With the improvement of the living standard of residents in China, the residents pay more and more attention to the problem of drinking safety. Along with the industrial development, a large amount of organic and inorganic pollutants are discharged into natural water, and the drinking water safety problem in China is not optimistic. In addition, the urban pipe network aging phenomenon and the like cause serious deterioration of the quality of tap water used by residents in China, and the overproof elements such as microorganisms, turbidity, fe, mn, ca, mg and the like are caused to restrict the development of the residents.
At present, the water supply terminal in China lacks safety guarantee, drinking water mainly depends on disinfectants (sodium hypochlorite and the like) added before a tap water plant is delivered to inhibit bacteria, the risk of leakage pollution in the water delivery process is difficult to deal with, and the taste is poor. According to statistics, the daily water consumption of each person of urban residents is about 100-150L, wherein only about 1-2L of water is directly drunk, and the rest is domestic miscellaneous water such as toilet flushing. In recent years, in order to ensure the water supply quality, some residents buy direct drinking machines by themselves, and some regions build direct drinking water projects. The direct drinking water machine or the direct drinking water project mainly depends on the membrane separation technology, can effectively remove the secondary pollution of the drinking water, and is particularly effective to the biological pollution of bacteria, viruses and the like. However, these membrane filtration processes require additional pressure, increase water supply costs, generally pursue water recovery by pressure separation, result in excess purified water, often require secondary storage, and may cause secondary contamination by bacteria. In addition, concentrated water generated in the nanofiltration and reverse osmosis filtration processes is difficult to apply, and serious resource waste is caused. The membrane separation process can produce severe membrane fouling, increasing operating and maintenance costs. Generally, the life of a PP cotton filter element of a commercial household water purifier taking reverse osmosis as a core is about 3 months, the life of an ultrafiltration filter element is 0.5-1 year, the life of a reverse osmosis filter element is about 3 years, the operation cost is high, and the living cost of residents is increased.
Natural organics are one of the most common foulants in filtering surface water, and are complex mixtures of inorganic and organic water-soluble components and particulate matter. Various disinfection byproducts can be generated in a water treatment process, meanwhile, membrane pollution can be caused, humic substances in natural organic substances, particularly Humic Acid (HA) can complex organic micro pollutants, heavy metal ions and other substances in water to influence the migration and removal of heavy metals due to the ion exchange property, and the humic acid in water can quench oxygen in a solution under the ultraviolet irradiation, so that the photodegradation of microcystins can be reduced. In addition, the amount of disinfectant added is increased, resulting in an increase in disinfection by-products.
Disclosure of Invention
In order to solve the problems, the invention provides a novel water supply mode based on a seepage separation membrane according to the characteristics of urban resident water.
The water supply system for residents and buildings comprises a tap water pipe network, a water tank, a water outlet, a water inlet pipe, a water outlet pipe and a water outlet pipe, wherein the water outlet pipe of the tap water pipe network is communicated with the inlet of a pipe type separation membrane; the water outlets of the tubular separation membranes are respectively communicated with a plurality of domestic water pipelines; valves are arranged on the pipeline and the household water pipeline; the water tank is positioned above the tubular separation membrane and below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank.
Further, a filter membrane is arranged at the water outlet of the water tank, wherein the preparation method of the filter membrane is as follows:
1) Dissolving dopamine hydrochloride in deionized water, stirring and dissolving, adding Tris, stirring and dissolving, and adjusting the pH value to 8-8.5; wherein the mass volume ratio of dopamine hydrochloride, tris and deionized water is 1 g; then adding TiO 2 Stirring the aqueous solution for reaction for 5-30 min, centrifuging, collecting precipitate, centrifugally washing with deionized water for three times, and vacuum drying at 60-80 ℃ for 24-48 h to obtain a reaction product; wherein, the dopamine hydrochloride and TiO 2 1 is 1;
2) Mixing and stirring ethyl orthosilicate and N, N-dimethylacetamide to obtain a mixed solution A; stirring and dissolving polyethylene glycol and lithium chloride to obtain a mixed solution B; stirring and mixing the mixed solution A and the mixed solution B, adding the reaction product obtained in the step 1) for ultrasonic dispersion, adding polyvinylidene fluoride, stirring for 12-24 hours to obtain mixed solution, and standing for defoaming; coating the mixed solution on a clean glass plate in a scraping way, controlling the film thickness to be 0.2-0.4 mm, and placing the glass plate in deionized water at 15-20 ℃ for 24 hours; thus completing the preparation of the titanium dioxide-containing hybrid membrane;
wherein, the mass percentage of the tetraethoxysilane in the mixed liquid is 10-12%, the mass percentage of the N, N-dimethylacetamide is 60-70%, the mass percentage of the polyethylene glycol is 3-5%, the mass percentage of the lithium chloride is 2-4%, the mass percentage of the polyvinylidene fluoride is 10-15%, and the mass percentage of the reaction product is 5-10%.
Further, the mixed solution in the step 2) is coated on a clean glass plate, and after the coating is finished, the glass plate is placed in deionized water within 10-20 s.
Further, the mass percent of the ethyl orthosilicate in the mixed liquid is 10-12%, the mass percent of the N, N-dimethylacetamide is 60-70%, the mass percent of the polyethylene glycol is 3-5%, the mass percent of the lithium chloride is 2-4%, the mass percent of the polyvinylidene fluoride is 10-15%, and the mass percent of the reaction product is 5-8%.
Further, the tubular separation membrane is a tubular ceramic membrane such as an alumina ceramic membrane, a silicon carbide ceramic membrane, a titanium oxide ceramic membrane, a graphene oxide modified ceramic membrane, a biomimetic coating modified ceramic membrane and the like, a tubular nanofiltration membrane, a negative charge separation membrane, a two-dimensional material separation membrane or a capillary separation membrane.
Furthermore, the diameter of the tubular separation membrane is 1 mm-1000 mm.
Furthermore, an ultraviolet disinfection device is additionally arranged in the water tank, and the volume of the water tank is 1-100000L.
Furthermore, the number of the household water pipelines is three, and each household water pipeline is provided with a valve, a valve and a valve.
Furthermore, the valve and the valve are all electronic valves and are linked with a valve arranged on a pipeline communicated with the water tank; and opening the valve, the valve and the valve, and automatically closing the valve.
Furthermore, a valve is arranged on the pipeline communicated with the water tank, and a valve is arranged on the pipeline communicated with the water tank; the valve and the valve are electronic valves, and the valve is opened and automatically closed; a liquid level meter is arranged in the water tank, and when the liquid level is smaller than the preset value, the valve is automatically closed, and water flows out by means of seepage.
Different from the traditional separation membrane pressurization operation mode, the system water supply mode adopts a seepage mode to discharge water and runs in a high flow speed mode, and the system disclosed by the invention has the advantages that the water discharged downstream of the membrane is slow, the water quality is high, and the requirement of drinking water can be met; the flow rate of the upstream of the membrane is high and low in pollution, and the requirements of domestic miscellaneous water of families, office buildings and communities are met. The water supply method is characterized in that the water amount of the produced drinking water is about two percent of the water amount of the life miscellaneous water, the water supply method accords with the water use rule of residents, the best use of the residents is achieved, and the water consumption is saved. The method has the advantages of low investment cost, no pollution in the membrane separation process and longer service life of the membrane by more than three times.
The prepared titanium dioxide-containing hybrid membrane can effectively improve the membrane flux, and meanwhile, the bovine serum albumin retention rate is higher. And has remarkable effect of removing humic acid. Moreover, the strength is also obviously improved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
For the purpose of promoting a clear understanding of the objects, aspects and advantages of the embodiments of the invention, reference will now be made in detail to the embodiments of the present disclosure, and it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure.
The exemplary embodiments and descriptions of the present invention are provided to explain the present invention and should not be interpreted as limiting the present invention.
Example 1:
the water supply system for residents and buildings adopts the following processes:
tap water is connected into the tubular separation membrane from a tap water pipe network, and inlet water enters from the inner pipe; the outer sides of the tubular membranes are connected by adopting a pipeline; the downstream of the pipeline is respectively communicated with the water tank 1 and the water tank 2 through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of domestic water pipelines 3; valves are arranged on the pipeline and the household water pipeline 3; the water tank 1 is positioned above the tubular separation membrane, and the water tank 2 is positioned below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank 2.
The tubular separation membrane is a tubular ceramic membrane with the diameter of 10mm. The pipeline is a stainless steel pipe.
The number of the household water pipelines 3 is three, and each household water pipeline is respectively provided with a valve 31, a valve 32 and a valve 33 and is used for different purposes such as vegetable washing, toilet flushing, clothes washing and the like.
The valve 31, the valve 32 and the valve 33 are all electronic valves and are linked with a valve 22 arranged on a pipeline communicated with the water tank 2; the valves 31, 32 and 33 are opened, and the valve 22 is automatically closed. The valve 31, the valve 32 and the valve 33 are opened to take the domestic miscellaneous water to play a role of flushing, and the pollution of the separation membrane is eliminated.
A valve 11 is arranged on the pipeline communicated with the water tank 1, and a valve 22 is arranged on the pipeline communicated with the water tank 2; the valve 11 and the valve 22 are electronic valves, and the valve 22 is opened to automatically close the valve 11; a liquid level meter is arranged in the water tank 2, and when the liquid level is less than the preset value, the valve 11 is automatically closed, and water flows out by means of seepage.
An ultraviolet disinfection device is additionally arranged in the water tank 2, and the volume of the ultraviolet disinfection device is 100L (taking three families as an example).
The valve 22 is used for discharging water from the system, and the water is directly drunk after being filtered by a filter membrane after being opened.
The tubular separation of the embodiment is that water flows out under the membrane by seepage, so that the water quality is high, and the requirement of drinking water can be met; the upstream flow rate of the tubular separation membrane is high, the pollution is low, and the requirement of domestic miscellaneous water is met. 10L of purified water is produced every day; 900L of domestic miscellaneous water accords with the water consumption law of residents, makes the best use of things and saves water. The service life of the tubular separation membrane in the embodiment can reach 10 years, and the permeation flux is not attenuated and is about 0.8 L.m -2 ·h -1 。
Example 2
The water supply system for residents and buildings adopts the following processes:
tap water is connected into the tubular separation membrane from a tap water pipe network, and inlet water enters from the inner pipe; the outer sides of the tubular membranes are connected by adopting a pipeline; the downstream of the pipeline is respectively communicated with the water tank 1 and the water tank 2 through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of household water pipelines 3; valves are arranged on the pipeline and the household water pipeline 3; the water tank 1 is positioned above the tubular separation membrane, and the water tank 2 is positioned below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank 2.
The tubular separation membrane is a tubular nanofiltration membrane with the diameter of 5mm. The pipeline is a copper pipe.
The number of the domestic water pipelines 3 is three, and each domestic water pipeline is respectively provided with a valve 31, a valve 32 and a valve 33 and is used for different purposes such as vegetable washing, toilet flushing, clothes washing and the like.
The valve 31, the valve 32 and the valve 33 are all electronic valves and are linked with the valve 22 arranged on the pipeline communicated with the water tank 2; the valves 31, 32 and 33 are opened, and the valve 22 is automatically closed. The valve 31, the valve 32 and the valve 33 are opened to take the domestic miscellaneous water to play a role of flushing, and the pollution of the separation membrane is eliminated.
A valve 11 is arranged on the pipeline communicated with the water tank 1, and a valve 22 is arranged on the pipeline communicated with the water tank 2; the valve 11 and the valve 22 are electronic valves, and the valve 22 is opened to automatically close the valve 11; a liquid level meter is arranged in the water tank 2, and when the liquid level is less than the preset value, the valve 11 is automatically closed, and water flows out by means of seepage.
An ultraviolet disinfection device is additionally arranged in the water tank 2, and the volume of the ultraviolet disinfection device is 80L (taking three families as an example).
The valve 22 is used for discharging water from the system, and the water is directly drunk after being filtered by a filter membrane after being opened.
The tubular separation membrane of the embodiment is used for discharging water under the membrane by means of seepage, so that the water quality is high, and the requirement of drinking water can be met; the upstream flow rate of the tubular separation membrane is high, the pollution is low, and the requirement of domestic miscellaneous water is met. Producing 8L of purified water every day; 750L of domestic miscellaneous water accords with the water use rule of residents, makes the best use of things and saves water. The service life of the tubular separation membrane in the embodiment can reach 8 years, and the permeation flux is not attenuated and is about 0.1 L.m -2 ·h -1 。
Example 3
The water supply system for residents and buildings adopts the following processes:
tap water is connected into the tubular separation membrane from a tap water pipe network, and inlet water enters from the inner pipe; the outer sides of the tubular membranes are connected by pipelines; the downstream of the pipeline is respectively communicated with the water tank 1 and the water tank 2 through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of household water pipelines 3; valves are arranged on the pipeline and the household water pipeline 3; the water tank 1 is positioned above the tubular separation membrane, and the water tank 2 is positioned below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank 2.
The tubular separation membrane is a graphene oxide modified ceramic membrane with the diameter of 6mm. The pipeline is a stainless steel pipe.
The number of the domestic water pipelines 3 is three, and each domestic water pipeline is respectively provided with a valve 31, a valve 32 and a valve 33 and is used for different purposes such as vegetable washing, toilet flushing, clothes washing and the like.
The valve 31, the valve 32 and the valve 33 are all electronic valves and are linked with a valve 22 arranged on a pipeline communicated with the water tank 2; the valves 31, 32 and 33 are opened, and the valve 22 is automatically closed. The valve 31, the valve 32 and the valve 33 are opened to take the domestic miscellaneous water to play a role of flushing, and the pollution of the separation membrane is eliminated.
A valve 11 is arranged on the pipeline communicated with the water tank 1, and a valve 22 is arranged on the pipeline communicated with the water tank 2; the valve 11 and the valve 22 are electronic valves, and the valve 22 is opened to automatically close the valve 11; a liquid level meter is arranged in the water tank 2, and when the liquid level is less than the preset value, the valve 11 is automatically closed, and water flows out by means of seepage.
An ultraviolet disinfection device is additionally arranged in the water tank 2, and the volume of the ultraviolet disinfection device is 80L (taking three families as an example).
The valve 22 is used for discharging water from the system, and the water is filtered through a filter membrane after being opened, so that direct drinking can be realized.
The tubular separation membrane of the embodiment is used for discharging water under the membrane by means of seepage, so that the water quality is high, and the requirement of drinking water can be met; the upstream flow rate of the tubular separation membrane is high, the pollution is low, and the requirement of domestic miscellaneous water is met. Producing 12L of purified water every day; the 1100L of the domestic miscellaneous water accords with the water consumption law of residents, makes the best use of things and saves water. The service life of the tubular separation membrane in the embodiment can reach 15 years, and the permeation flux is not attenuated and is about 0.9 L.m -2 ·h -1 。
Example 4
The water supply system for residents and buildings adopts the following processes:
tap water is connected into the tubular separation membrane from a tap water pipe network, and inlet water enters from the inner pipe; the outer sides of the tubular membranes are connected by pipelines; the downstream of the pipeline is respectively communicated with the water tank 1 and the water tank 2 through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of domestic water pipelines 3; valves are arranged on the pipeline and the household water pipeline 3; the water tank 1 is positioned above the tubular separation membrane, and the water tank 2 is positioned below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank 2.
The tubular separation membrane is a tubular titanium dioxide ceramic membrane with the diameter of 8mm. The pipeline is food-grade pipe such as stainless steel pipe, copper pipe, etc.
The number of the domestic water pipelines 3 is three, and each domestic water pipeline is respectively provided with a valve 31, a valve 32 and a valve 33 and is used for different purposes such as vegetable washing, toilet flushing, clothes washing and the like.
The valve 31, the valve 32 and the valve 33 are all electronic valves and are linked with a valve 22 arranged on a pipeline communicated with the water tank 2; the valves 31, 32 and 33 are opened, and the valve 22 is automatically closed. The valve 31, the valve 32 and the valve 33 are opened to take the domestic waste water to play a role of flushing, and the pollution of the separation membrane is eliminated.
A valve 11 is arranged on the pipeline communicated with the water tank 1, and a valve 22 is arranged on the pipeline communicated with the water tank 2; the valve 11 and the valve 22 are electronic valves, and the valve 22 is opened to automatically close the valve 11; a liquid level meter is arranged in the water tank 2, and when the liquid level is less than the preset value, the valve 11 is automatically closed, and water flows out by means of seepage.
An ultraviolet disinfection device is additionally arranged in the water tank 2, and the volume of the ultraviolet disinfection device is 120L (taking three families as an example).
The valve 22 is used for discharging water from the system, and the water is directly drunk after being filtered by a filter membrane after being opened.
The tubular separation membrane of the embodiment is used for discharging water under the membrane by means of seepage, so that the water quality is high, and the requirement of drinking water can be met; the upstream flow rate of the tubular separation membrane is high, the pollution is low, and the requirement of domestic miscellaneous water is met. Producing 14L of purified water every day; 1200L of domestic miscellaneous water accords with the water consumption law of residents, makes the best use of things and saves water. The service life of the tubular separation membrane in the embodiment can reach 13 years, and the permeation flux is not attenuated and is about 0.7 L.m -2 ·h -1 。
Example 5
The water supply system for residents and buildings adopts the following processes:
tap water is connected into the tubular separation membrane from a tap water pipe network, and inlet water enters from the inner pipe; the outer sides of the tubular membranes are connected by pipelines; the downstream of the pipeline is respectively communicated with the water tank 1 and the water tank 2 through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of domestic water pipelines 3; valves are arranged on the pipeline and the household water pipeline 3; the water tank 1 is positioned above the tubular separation membrane, and the water tank 2 is positioned below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank 2.
The tubular separation membrane is a tubular two-dimensional material separation membrane with the diameter of 80mm. The pipeline is a stainless steel pipe.
The number of the domestic water pipelines 3 is three, and each domestic water pipeline is respectively provided with a valve 31, a valve 32 and a valve 33 and is used for different purposes such as vegetable washing, toilet flushing, clothes washing and the like.
The valve 31, the valve 32 and the valve 33 are all electronic valves and are linked with a valve 22 arranged on a pipeline communicated with the water tank 2; the valves 31, 32 and 33 are opened, and the valve 22 is automatically closed. The valve 31, the valve 32 and the valve 33 are opened to take the domestic waste water to play a role of flushing, and the pollution of the separation membrane is eliminated.
A valve 11 is arranged on the pipeline communicated with the water tank 1, and a valve 22 is arranged on the pipeline communicated with the water tank 2; the valve 11 and the valve 22 are electronic valves, and the valve 22 is opened to automatically close the valve 11; a liquid level meter is arranged in the water tank 2, when the liquid level is smaller than the preset value, the valve 11 is automatically closed, and water flows out by means of seepage.
An ultraviolet disinfection device is additionally arranged in the water tank 2, and the volume of the ultraviolet disinfection device is 1000L (taking a high-rise building as an example).
The valve 22 is used for discharging water from the system, and the water is directly drunk after being filtered by a filter membrane after being opened.
The tubular separation membrane of the embodiment is used for discharging water under the membrane by means of seepage, so that the water quality is high, and the requirement of drinking water can be met; the upstream flow rate of the membrane is high, the pollution is low, and the requirement of domestic water for miscellaneous use of each family is met. Producing 600L of purified water every day; 53,000L of domestic miscellaneous water conforms to the water use law of residents, makes the best use of things and saves water. This exampleThe service life of the membrane can reach 15 years, and the permeation flux is not attenuated and is about 12.7 L.m -2 ·h -1 。
Example 6
The resident and building water supply system of the embodiment adopts the following processes:
tap water is connected into the tubular separation membrane from a tap water pipe network, and inlet water enters from the inner pipe; the outer sides of the tubular membranes are connected by pipelines; the downstream of the pipeline is respectively communicated with the water tank 1 and the water tank 2 through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of domestic water pipelines 3; valves are arranged on the pipeline and the household water pipeline 3; the water tank 1 is positioned above the tubular separation membrane, and the water tank 2 is positioned below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank 2.
The tubular separation membrane is a capillary separation membrane, the diameter of the pipeline is 500mm, the diameter of the capillary is 5mm, and 300 capillaries are placed in each component. The pipeline is a stainless steel pipe.
The number of the domestic water pipelines 3 is three, and each domestic water pipeline is respectively provided with a valve 31, a valve 32 and a valve 33 and is used for different purposes such as vegetable washing, toilet flushing, clothes washing and the like.
The valve 31, the valve 32 and the valve 33 are all electronic valves and are linked with a valve 22 arranged on a pipeline communicated with the water tank 2; the valves 31, 32 and 33 are opened, and the valve 22 is automatically closed. The valve 31, the valve 32 and the valve 33 are opened to take the domestic miscellaneous water to play a role of flushing, and the pollution of the separation membrane is eliminated.
A valve 11 is arranged on the pipeline communicated with the water tank 1, and a valve 22 is arranged on the pipeline communicated with the water tank 2; the valve 11 and the valve 22 are electronic valves, and the valve 22 is opened to automatically close the valve 11; a liquid level meter is arranged in the water tank 2, when the liquid level is smaller than the preset value, the valve 11 is automatically closed, and water flows out by means of seepage.
An ultraviolet disinfection device is additionally arranged in the water tank 2, and the volume of the ultraviolet disinfection device is 1000L (taking a high-rise building as an example).
The valve 22 is used for discharging water from the system, and the water is filtered through a filter membrane after being opened, so that direct drinking can be realized.
Tube of the present embodimentThe water flows out under the membrane by means of seepage, so that the water quality is high, and the requirement of drinking water can be met; the upstream flow rate of the membrane is high, the pollution is low, and the requirement of domestic general water of single building families is met. Producing 800L of purified water every day; 70,000L of domestic miscellaneous water conforms to the water use rule of residents, makes the best use of things and saves water. The service life of the membrane of the embodiment can reach 12 years, and the permeation flux is not attenuated and is about 23.7 L.m in the using process -2 ·h -1 。
Example 7
The water supply system for residents and buildings adopts the following processes:
tap water is connected into the tubular separation membrane from a tap water pipe network, and inlet water enters from the inner pipe; the outer sides of the tubular membranes are connected by pipelines; the downstream of the pipeline is respectively communicated with the water tank 1 and the water tank 2 through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of domestic water pipelines 3; valves are arranged on the pipeline and the household water pipeline 3; the water tank 1 is positioned above the tubular separation membrane, and the water tank 2 is positioned below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank 2.
The tubular separation membrane is a graphene oxide modified ceramic membrane with the diameter of 6mm. The pipeline is a stainless steel pipe.
The number of the domestic water pipelines 3 is three, and each domestic water pipeline is respectively provided with a valve 31, a valve 32 and a valve 33 and is used for different purposes such as vegetable washing, toilet flushing, clothes washing and the like.
The valve 31, the valve 32 and the valve 33 are all electronic valves and are linked with a valve 22 arranged on a pipeline communicated with the water tank 2; the valves 31, 32 and 33 are opened, and the valve 22 is automatically closed. The valve 31, the valve 32 and the valve 33 are opened to take the domestic miscellaneous water to play a role of flushing, and the pollution of the separation membrane is eliminated.
A valve 11 is arranged on the pipeline communicated with the water tank 1, and a valve 22 is arranged on the pipeline communicated with the water tank 2; the valve 11 and the valve 22 are electronic valves, and the valve 22 is opened to automatically close the valve 11; a liquid level meter is arranged in the water tank 2, and when the liquid level is less than the preset value, the valve 11 is automatically closed, and water flows out by means of seepage.
An ultraviolet disinfection device is additionally arranged in the water tank 2, and the volume of the ultraviolet disinfection device is 80L (taking three families as an example).
The valve 22 is used for discharging water from the system, and the water is directly drunk after being filtered by a filter membrane after being opened.
The tubular separation membrane of the embodiment is used for discharging water under the membrane by means of seepage, so that the water quality is high, and the requirement of drinking water can be met; the upstream flow rate of the membrane is high, the pollution is low, and the requirement of domestic miscellaneous water is met. Producing 12L of purified water every day; 900L of domestic miscellaneous water accords with the water consumption law of residents, makes the best use of things and saves water. The service life of the membrane of the embodiment can reach 18 years, and the permeation flux is not attenuated and is about 16.7 L.m -2 ·h -1 。
Example 8
1) Dissolving 0.5g of dopamine hydrochloride in 200mL of deionized water, stirring and dissolving, adding 0.3g of Tris, stirring and dissolving, and adjusting the pH value to 8.5; then adding TiO 2 Stirring the aqueous solution for reaction for 30min, centrifuging, collecting precipitate, centrifuging and washing with deionized water for three times, and vacuum drying at 80 ℃ for 48h to obtain a reaction product; wherein, the dopamine hydrochloride and TiO 2 1;
2) Mixing and stirring ethyl orthosilicate and N, N-dimethylacetamide to obtain a mixed solution A; stirring and dissolving polyethylene glycol and lithium chloride to obtain a mixed solution B; stirring and mixing the mixed solution A and the mixed solution B, adding the reaction product obtained in the step 1) for ultrasonic dispersion, adding polyvinylidene fluoride, stirring for 24 hours to obtain mixed solution, and standing for defoaming; coating the mixed solution on a clean glass plate in a scraping way, controlling the film thickness to be 0.3mm, and placing the glass plate in deionized water at the temperature of 20 ℃ for 24 hours; thus completing the preparation of the titanium dioxide-containing hybrid membrane;
wherein the mixed solution comprises 12 percent by mass of ethyl orthosilicate, 60 percent by mass of N, N-dimethylacetamide, 4 percent by mass of polyethylene glycol, 3 percent by mass of lithium chloride, 14 percent by mass of polyvinylidene fluoride and TiO 2 The mass percentage of the-dopamine reaction product is 7%.
Comparative example 1
This comparative example differs from example 8 in that: ethyl orthosilicate and polyethylene glycol were not added. The rest was the same as in example 8.
Comparative example 2
This comparative example differs from example 8 in that: the film thickness was controlled at 0.6mm, and the reaction was stirred for 10min in step 1). The rest was the same as in example 8.
Comparative example 3
This comparative example differs from example 8 in that: the mass percentage of the ethyl orthosilicate in the mixed liquid is 6%, the mass percentage of the N, N-dimethylacetamide is 66%, the mass percentage of the polyethylene glycol is 4%, the mass percentage of the lithium chloride is 3%, the mass percentage of the polyvinylidene fluoride is 14%, and the mass percentage of the TiO is 14% 2 The mass percentage of the-dopamine reaction product is 7%. The rest is the same as in example 8.
Comparative example 4
This comparative example differs from example 8 in that: the mass percentage of the ethyl orthosilicate in the mixed liquid is 12%, the mass percentage of the N, N-dimethylacetamide is 63%, the mass percentage of the polyethylene glycol is 4%, the mass percentage of the lithium chloride is 3%, the mass percentage of the polyvinylidene fluoride is 14%, and the mass percentage of the TiO is 14% 2 The mass percentage of the-dopamine reaction product is 4%. The rest is the same as in example 8.
Aiming at titanium dioxide-containing hybrid membranes of examples and comparative examples, the pure water flux and the rejection rate of bovine serum albumin with the concentration of 0.5g/L and the removal rate of humic acid with the concentration of 10mg/L are examined under the UV illumination condition with the operation pressure of 0.1MPa; and the prepared film was subjected to tensile strength and elastic modulus investigation. The results are given in the table below.
Figure BDA0003720687080000091
As can be confirmed from the above table, this example significantly improved the strength of the membrane by adding tetraethoxysilane and polyethylene glycol. Improved TiO 2 The dopamine content provides this significant improvement in humic acid removal, membrane flux and rejection. Control of membrane thickness and reaction time versus membrane flux and rejectionAnd the removal of humic acid has important function.

Claims (10)

1. A resident and building water supply system is characterized in that the water supply system comprises a water outlet of a tap water pipe network and an inlet of a tubular separation membrane, wherein the downstream of the tubular separation membrane is respectively communicated with a water tank (1) and a water tank (2) through pipelines; the water outlets of the tubular separation membranes are respectively communicated with a plurality of domestic water pipelines (3); valves are arranged on the pipeline and the household water pipeline (3); the water tank (1) is positioned above the tubular separation membrane, and the water tank (2) is positioned below the tubular separation membrane; and a filter membrane is arranged at the water outlet of the water tank (2).
2. A residential and construction water supply system according to claim 1, characterized in that the outlet of the tank (2) is provided with a filter membrane, wherein the filter membrane is prepared by the following method:
1) Dissolving dopamine hydrochloride in deionized water, stirring and dissolving, adding Tris, stirring and dissolving, and adjusting the pH value to 8-8.5; wherein the mass volume ratio of dopamine hydrochloride, tris and deionized water is 1 g; then adding TiO 2 Stirring the aqueous solution for reaction for 5-30 min, centrifuging, collecting precipitate, centrifuging and washing with deionized water for three times, and vacuum drying at 60-80 ℃ for 24-48 h to obtain a reaction product; wherein, dopamine hydrochloride and TiO 2 1 is 1;
2) Mixing and stirring ethyl orthosilicate and N, N-dimethylacetamide to obtain a mixed solution A; stirring and dissolving polyethylene glycol and lithium chloride to obtain a mixed solution B; stirring and mixing the mixed solution A and the mixed solution B, adding the reaction product obtained in the step 1) for ultrasonic dispersion, adding polyvinylidene fluoride, stirring for 12-24 hours to obtain mixed solution, and standing for defoaming; coating the mixed solution on a clean glass plate with a film thickness controlled between 0.2 mm and 0.4mm, and placing the glass plate in deionized water at a temperature of between 15 and 20 ℃ for 24 hours; thus completing the preparation of the titanium dioxide-containing hybrid membrane;
wherein the mass percent of the tetraethoxysilane in the mixed liquid is 10-12%, the mass percent of the N, N-dimethylacetamide is 60-70%, the mass percent of the polyethylene glycol is 3-5%, the mass percent of the lithium chloride is 2-4%, the mass percent of the polyvinylidene fluoride is 10-15%, and the mass percent of the reaction product is 5-10%.
3. The system according to claim 2, wherein the mixture of step 2) is drawn down on a clean glass plate, and the glass plate is placed in deionized water within 10-20 seconds after the drawing down.
4. A water supply system for residents and buildings according to claim 2 wherein the weight percentage of the tetraethoxysilane, the N, N-dimethylacetamide, the polyethylene glycol, the lithium chloride, the polyvinylidene fluoride and the reaction product are 10-12%, 60-70%, 3-5%, 2-4%, 10-15% and 5-8%, respectively.
5. The water supply system according to claim 1, wherein the tubular separation membrane is a tubular ceramic membrane such as an alumina ceramic membrane, a silicon carbide ceramic membrane, a titania ceramic membrane, a graphene oxide modified ceramic membrane, a biomimetic coating modified ceramic membrane, a tubular nanofiltration membrane, a negatively charged separation membrane, a two-dimensional material separation membrane, or a capillary separation membrane.
6. A domestic and building water supply system according to claim 1 or 7, wherein the tubular separation membrane has a diameter of from 1mm to 1000mm.
7. A domestic and architectural water supply system according to claim 1, wherein said tank (2) is internally provided with an ultraviolet disinfection device, and the tank (2) has a volume of 1-100000L.
8. A resident and building water supply system according to claim 1, characterized in that the domestic water pipes (3) are three, each of which is provided with a valve (31), a valve (32) and a valve (33), respectively.
9. A water supply system for residents and buildings according to claim 8 wherein the valves (31), (32) and (33) are electronic valves and are linked with a valve (22) arranged on a pipe communicating with the water tank (2); the valve (31), the valve (32) and the valve (33) are opened, and the valve (22) is automatically closed.
10. A residential and building water supply system according to claim 1, characterized in that said conduit communicating with the tank (1) is provided with a valve (11) and the conduit communicating with the tank (2) is provided with a valve (22); the valve (11) and the valve (22) are electronic valves, and the valve (22) is opened to automatically close the valve (11); a liquid level meter is arranged in the water tank (2), and when the liquid level is less than the preset value, the valve (11) is automatically closed, and water flows out by means of seepage.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203429700U (en) * 2013-06-27 2014-02-12 泰安圣源环保科技有限公司 Direct drinking water building integrated energy saving system
CN105457504A (en) * 2015-12-31 2016-04-06 杭州市特种设备检测研究院 Novel titanium dioxide nano-particle/polymer hybrid membrane and preparation method thereof
CN107715700A (en) * 2017-11-24 2018-02-23 中国科学院烟台海岸带研究所 A kind of high-salt wastewater processing corrosion resistant anti-soil film and its preparation method and application

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203429700U (en) * 2013-06-27 2014-02-12 泰安圣源环保科技有限公司 Direct drinking water building integrated energy saving system
CN105457504A (en) * 2015-12-31 2016-04-06 杭州市特种设备检测研究院 Novel titanium dioxide nano-particle/polymer hybrid membrane and preparation method thereof
CN107715700A (en) * 2017-11-24 2018-02-23 中国科学院烟台海岸带研究所 A kind of high-salt wastewater processing corrosion resistant anti-soil film and its preparation method and application

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