CN106630324A - Central water purification equipment and membrane system cleaning method thereof - Google Patents
Central water purification equipment and membrane system cleaning method thereof Download PDFInfo
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- CN106630324A CN106630324A CN201611109568.2A CN201611109568A CN106630324A CN 106630324 A CN106630324 A CN 106630324A CN 201611109568 A CN201611109568 A CN 201611109568A CN 106630324 A CN106630324 A CN 106630324A
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- Prior art keywords
- water
- filter
- cleaning
- pump
- valve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 250
- 239000012528 membrane Substances 0.000 title claims abstract description 8
- 238000004140 cleaning Methods 0.000 title claims description 70
- 238000000034 method Methods 0.000 title claims description 7
- 238000000746 purification Methods 0.000 title abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000010926 purge Methods 0.000 claims description 45
- 238000011010 flushing procedure Methods 0.000 claims description 22
- 229910052799 carbon Inorganic materials 0.000 claims description 19
- 238000010079 rubber tapping Methods 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 16
- 238000005660 chlorination reaction Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 12
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims description 8
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 5
- -1 Polypropylene Polymers 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 4
- 239000012895 dilution Substances 0.000 claims description 4
- 238000005342 ion exchange Methods 0.000 claims description 4
- 239000006210 lotion Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- MZSDGDXXBZSFTG-UHFFFAOYSA-M sodium;benzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=CC=C1 MZSDGDXXBZSFTG-UHFFFAOYSA-M 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 7
- 239000008399 tap water Substances 0.000 abstract description 2
- 235000020679 tap water Nutrition 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 10
- 239000012535 impurity Substances 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
-
- 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
- C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
Abstract
The invention discloses central water purification equipment which comprises a raw water tank, a raw water pump, a multi-media filter, an activated carbon filter, a water softener, a precision filter, an NF membrane filter, a high pressure pump, a disinfection device and a water purification tank, wherein a water inlet of the raw water tank is connected with a tap water pipeline; a water outlet of the raw water tank is connected with the water inlet of the raw water pump; the water outlet of the raw water pump is connected with the water inlet of the multi-media filter; the water outlet of the multi-media filter is connected with the water inlet of the activated carbon filter; the water outlet of the activated carbon filter is connected with the water inlet of the water softener; the water outlet of the water softener is connected with the water inlet of the precision filter; the water outlet of the precision filter is connected with the water inlet of the NF membrane filter; the water outlet of the NF membrane filter is connected with the water inlet of the high pressure pump; the water outlet of the high pressure pump is connected with the water inlet of the disinfection device; the water outlet of the disinfection device is connected with the water inlet of the water purification tank. The central water purification equipment provided by the invention is simple in structure, can provide high-quality water, can save water resources and can also reduce the equipment operation cost.
Description
Technical field
The present invention relates to a kind of water treatment facilities, a kind of particularly central water purifier.
Background technology
In the prior art, the running water that waterworks is produced flows into the conduct such as common people family after city planting ductwork and drinks
Water is public use, but existing tap water purifying technique can only remove 20% or so to organic matter in water source etc., and municipal
Pipe network etc. conveys wetting system and can bring secondary pollution due to outmoded grade, in addition, sterilized using chlorine more than waterworks, chlorine with it is organic
Thing combination can produce new carcinogen, and above factors cause running water to reach the requirement of drinking of direct drinking, existing
Building water system in, resident need drink grade water need for each family oneself purchase configuration water purifier, high cost,
Water purification quality height is different, is unfavorable for management；
And at present conventional purifier by sand filtration, carbon filtration and micro-filtration, these three filters are formed by connecting by pipeline,
Water quality definition after the filtration of the equipment is not high, it is impossible to filter out little particle impurity, cannot also remove the suspension in the middle of water quality
Thing, its water it is edible not safe enough, it is impossible to meet the needs of domestic water and drinking water.
The content of the invention
The technical problem to be solved is the shortcoming for overcoming prior art, there is provided a kind of simple structure, saves water
Resource, reduces cost, provides the central water purifier of high-quality water.
The present invention solves the technical scheme of above technical problem：A kind of central water purifier, including raw water box, original are provided
Water pump, more medium filter, active carbon filter, water softener, accurate filter, NF film filters, high-pressure pump, chlorination equipment and
Clear water tanks, it is characterised in that the raw water box water inlet connects water supply pipe, the raw water box delivery port connection raw water pump enters
The mouth of a river, the delivery port connection more medium filter water inlet of the raw water pump, the raw water pump exit is provided with branch road, described
Road is connected with accurate filter, and the branch road is provided with flushing valve, and the more medium filter delivery port connection activated carbon is filtered
Device water inlet, the active carbon filter delivery port connects water softener water inlet, and the water softener delivery port connects secondary filter
Device water inlet, the accurate filter delivery port connects NF film filter water inlets, and the NF film filters delivery port connection is high
Press pump water inlet, the high-pressure pump delivery port connects chlorination equipment water inlet, and the chlorination equipment delivery port connection clear water tanks enter
The mouth of a river；
Described central water purifier also includes purging system, and the purging system includes purge tank, cleaning pump, purge valve and clear
Pipeline is washed, the purge tank outlet connection cleaning pump inlet, the cleaning pump discharge is provided with purge valve, the cleaning pipeline connection
Branch road.
The further restriction technical scheme of the present invention：
The filter core aperture of aforesaid more medium filter is 40um-100um.
Aforesaid accurate filter adopts 5 micron polypropylene melt-blown filters.
Aforesaid water softener is ion exchange softener.
The specification of the NF films in aforesaid NF film filters be ESNA1-4040 or ESNA1-K1, the NF film filters bottom
End is provided with tapping valve.
Aforesaid NF film filters water inlet is provided with flowmeter.
The membranous system cleaning method of aforesaid central water purifier is comprised the following steps：
Step one：Under manual mode, the tapping valve of NF film filters bottom is opened, concentrated water drainage is bled off, open running water valve
Allow running water to enter raw water box, then open the flushing valve on branch road, start raw water pump, running water is sent to into NF by branch road
In film filter, the film surface in NF film filters is cleaned, the time is 10-20 minutes；
Step 2：Cleaning solution is prepared, by the sodium tripolyphosphate that mass fraction is 2.0% and the dodecane that mass fraction is 0.8%
Base benzene sulfonic acid sodium salt mixes, and is adjusted by the concentrated sulfuric acid so that the pH value of the solution of mixing puts the cleaning fluid for preparing 10
Enter in the middle of purge tank；
Step 3：In the middle of pass hull closure filter connection valve, close tapping valve and produce water valve, open flushing valve and other
The valve of membranous system is rinsed, starts cleaning pump, the cleaning fluid in the middle of purge tank is sent in cleaning pipeline, initial period, clearly
Washing lotion is back to before NF purge tanks, and initial phegma is emitted, in case the water being detained in system is caused to cleaning solution
Dilution wash cycles, then begin slowly to that flow velocity will be adjusted, and are circulated cleaning, and the time is 30-60 minutes；
Step 4：After terminating according to step 3 cleaning, the tapping valve for opening NF film filters falls cleaning fluid discharge, then running water
Valve and flushing valve, starting raw water pump clear water carries out low-pressure washing, removes residual in accurate filter and NF membrane filters
Chemical substance, discharge and rinse purge tank, then clear water will be filled in purge tank again, clear water is sent to by institute by cleaning pump
In having container, carry out being discharged after low-pressure washing, may be repeated flushing；
Step 5：After membranous system clear water is completely flushed, last low-pressure washing is carried out, the time is 20-60 minutes, after terminating
Take a small amount of relief liquor to be detected, see whether pH value reaches setting.
The invention has the beneficial effects as follows：The present invention is a kind of purifier of simple structure, using more medium filter, work
Property carbon filter, accurate filter, NF film filters this level Four filter, can effectively filter out the impurity in raw water, and adopt
With more medium filter filter core aperture 40-100um, the filter core aperture of accurate filter is 5um, can remove in eliminating water silt and thick
The impurity of particle, the activated carbon in active carbon filter can effectively adsorb the organic matter and some peculiar smell in the middle of water, NF
NF films adopt ESNA1-K1 in film filter, can remove the pollutant such as all chlorine residue, inorganic matter and bacterium in eliminating water, using from
Son exchanges water softener, can effectively remove calcium, the magnesium ion in water, reduces water hardness, and the present invention enters in NF film filters
Flowmeter is provided with the mouth of a river, is easy to the control to flow；And branch road is provided with raw water pump exit, and branch road is provided with flushing
Valve, branch road is connected with NF film filters, and this is easy for the cleaning to membranous system in the middle of equipment, and mass fraction is by cleaning fluid
2.0% sodium tripolyphosphate and mass fraction are 0.8% neopelex mixing, and by the concentrated sulfuric acid pH is adjusted
Value, the mixed liquor is to remove calcium sulfate scale and slight extremely moderate Natural Organic Pollutants, and sodium tripolyphosphate has
The function of inorganic chelator and detergent, neopelex be one have sequestering organic chelated cleaning agent, can
Effectively remove divalence and Tricationic and metal ion.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
1- raw water boxs, 2- raw water pumps, 3- more medium filters, 4- active carbon filters, 5- water softeners, 6- accurate filters, 7-
High-pressure pump, 8-NF film filters, 9- chlorination equipments, 10- clear water tanks, 11- flowmeters, 12- water supply pipes, 13- flushing valves,
14- tapping valves, 15- branch roads, 16- purge tanks, 17- cleaning pumps, 18- purge valves, 19- cleaning pipelines.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of central water purifier, as shown in figure 1, including raw water box 1, raw water pump 2, more medium filter 3,
Active carbon filter 4, water softener 5, accurate filter 6, NF film filters 8, high-pressure pump 7, chlorination equipment 9 and clear water tanks 10, it is former
The water inlet of water tank 1 connects water supply pipe 12, and the delivery port of the raw water box 1 connection water inlet of raw water pump 2, the delivery port of raw water pump 2 connects
The water inlet of more medium filter 3 is connect, the exit of raw water pump 2 is provided with branch road 15, and branch road 15 is connected with NF film filters 8, branch road 15
It is provided with flushing valve 13, the delivery port of the more medium filter 3 connection water inlet of active carbon filter 4, the filter core of more medium filter 3
Aperture is 50um, and the delivery port of the active carbon filter 4 connection water inlet of water softener 5, water softener delivery port connection accurate filter 6 enters
The mouth of a river, water softener 5 is ion exchange softener, and accurate filter 6 adopts 5 micron polypropylene melt-blown filters, accurate filter 6 to go out
The mouth of a river connects the water inlet of NF film filters 8, and the specification of the NF films in NF film filters 8 is ESNA1-K1, and NF film filters are intake
Flowmeter 11 is provided with mouthful, the bottom of NF film filters 8 is provided with tapping valve 14, and the delivery port of NF film filters 8 connection high-pressure pump 7 enters
The mouth of a river, the delivery port of the high-pressure pump 7 connection water inlet of chlorination equipment 9, the delivery port of the chlorination equipment 9 connection water inlet of clear water tanks 10, this sets
Standby also to include purging system, purging system includes purge tank 16, cleaning pump 17, purge valve 18 and cleaning pipeline 19, purge tank 16
The outlet connection import of cleaning pump 17, the outlet of cleaning pump 17 is provided with purge valve 18, the cleaning connection branch road 15 of pipeline 19.
Raw water in raw water box is sent in more medium filter and is filtered by the present embodiment by raw water pump, is filtered followed by
Adsorption filtration in active carbon filter is entered into, the water after the filtration of active carbon filter is being fed to water softener, so
After be admitted in accurate filter and filter again, the water after filtration enters into NF film filters, by NF films to the impurity in water
Filtered, the water after filtration is sent in ultra violet sterilizer by high-pressure pump and is carried out disinfection, the water after sterilization is arrived only
In water tank.
The central water purifier that the present embodiment is provided, the cleaning method of its membranous system is comprised the following steps：
Step one：Under manual mode, the tapping valve of NF film filters bottom is opened, concentrated water drainage is bled off, open running water valve
Allow running water to enter raw water box, then open the flushing valve on branch road, start raw water pump, running water is sent to into NF by branch road
In film filter, the film surface in NF film filters is cleaned, the time is 15 minutes；
Step 2：Cleaning solution is prepared, by the sodium tripolyphosphate that mass fraction is 2.0% and the dodecane that mass fraction is 0.8%
Base benzene sulfonic acid sodium salt mixes, and is adjusted by the concentrated sulfuric acid so that the pH value of the solution of mixing puts the cleaning fluid for preparing 10
Enter in the middle of purge tank；
Step 3：In the middle of pass hull closure filter connection valve, close tapping valve and produce water valve, open flushing valve and other
The valve of membranous system is rinsed, starts cleaning pump, the cleaning fluid in the middle of purge tank is sent in cleaning pipeline, initial period, clearly
Washing lotion is back to before NF purge tanks, and initial phegma is emitted, in case the water being detained in system is caused to cleaning solution
Dilution wash cycles, then begin slowly to that flow velocity will be adjusted, and are circulated cleaning, and the time is 30 minutes；
Step 4：After terminating according to step 3 cleaning, the tapping valve for opening NF film filters falls cleaning fluid discharge, then running water
Valve and flushing valve, starting raw water pump clear water carries out low-pressure washing, removes residual in accurate filter and NF membrane filters
Chemical substance, discharge and rinse purge tank, then clear water will be filled in purge tank again, clear water is sent to by institute by cleaning pump
In having container, carry out being discharged after low-pressure washing, may be repeated flushing；
Step 5：After membranous system clear water is completely flushed, last low-pressure washing is carried out, the time is 40 minutes, is taken after terminating
A small amount of relief liquor detected, sees whether pH value reaches setting.
Embodiment 2
The present embodiment provides a kind of central water purifier, as shown in figure 1, including raw water box 1, raw water pump 2, more medium filter 3,
Active carbon filter 4, water softener 5, accurate filter 6, NF film filters 8, high-pressure pump 7, chlorination equipment 9 and clear water tanks 10, it is former
The water inlet of water tank 1 connects water supply pipe 12, and the delivery port of the raw water box 1 connection water inlet of raw water pump 2, the delivery port of raw water pump 2 connects
The water inlet of more medium filter 3 is connect, the exit of raw water pump 2 is provided with branch road 15, and branch road 15 is connected with NF film filters 8, branch road 15
It is provided with flushing valve 13, the delivery port of the more medium filter 3 connection water inlet of active carbon filter 4, the filter core of more medium filter 3
Aperture is 40um, and the delivery port of the active carbon filter 4 connection water inlet of water softener 5, water softener delivery port connection accurate filter 6 enters
The mouth of a river, water softener 5 is ion exchange softener, and accurate filter 6 adopts 5 micron polypropylene melt-blown filters, accurate filter 6 to go out
The mouth of a river connects the water inlet of NF film filters 8, and the specification of the NF films in NF film filters 8 is ESNA1-4040, and NF film filters enter
Flowmeter 11 is provided with the mouth of a river, the bottom of NF film filters 8 is provided with tapping valve 14, the delivery port of NF film filters 8 connection high-pressure pump 7
Water inlet, the delivery port of the high-pressure pump 7 connection water inlet of chlorination equipment 9, the delivery port of the chlorination equipment 9 connection water inlet of clear water tanks 10 should
Equipment also includes purging system, and purging system includes purge tank 16, cleaning pump 17, purge valve 18 and cleaning pipeline 19, purge tank
The 16 outlet connection imports of cleaning pump 17, the outlet of cleaning pump 17 is provided with purge valve 18, the cleaning connection branch road 15 of pipeline 19.
Raw water in raw water box is sent in more medium filter and is filtered by the present embodiment by raw water pump, is filtered followed by
Adsorption filtration in active carbon filter is entered into, the water after the filtration of active carbon filter is being fed to water softener, so
After be admitted in accurate filter and filter again, the water after filtration enters into NF film filters, by NF films to the impurity in water
Filtered, the water after filtration is sent in ultra violet sterilizer by high-pressure pump and is carried out disinfection, the water after sterilization is arrived only
In water tank.
The central water purifier that the present embodiment is provided, the cleaning method of its membranous system is comprised the following steps：
Step one：Under manual mode, the tapping valve of NF film filters bottom is opened, concentrated water drainage is bled off, open running water valve
Allow running water to enter raw water box, then open the flushing valve on branch road, start raw water pump, running water is sent to into NF by branch road
In film filter, the film surface in NF film filters is cleaned, the time is 20 minutes；
Step 2：Cleaning solution is prepared, by the sodium tripolyphosphate that mass fraction is 2.0% and the dodecane that mass fraction is 0.8%
Base benzene sulfonic acid sodium salt mixes, and is adjusted by the concentrated sulfuric acid so that the pH value of the solution of mixing puts the cleaning fluid for preparing 10
Enter in the middle of purge tank；
Step 3：In the middle of pass hull closure filter connection valve, close tapping valve and produce water valve, open flushing valve and other
The valve of membranous system is rinsed, starts cleaning pump, the cleaning fluid in the middle of purge tank is sent in cleaning pipeline, initial period, clearly
Washing lotion is back to before NF purge tanks, and initial phegma is emitted, in case the water being detained in system is caused to cleaning solution
Dilution wash cycles, then begin slowly to that flow velocity will be adjusted, and are circulated cleaning, and the time is 60 minutes；
Step 4：After terminating according to step 3 cleaning, the tapping valve for opening NF film filters falls cleaning fluid discharge, then running water
Valve and flushing valve, starting raw water pump clear water carries out low-pressure washing, removes residual in accurate filter and NF membrane filters
Chemical substance, discharge and rinse purge tank, then clear water will be filled in purge tank again, clear water is sent to by institute by cleaning pump
In having container, carry out being discharged after low-pressure washing, may be repeated flushing；
Step 5：After membranous system clear water is completely flushed, last low-pressure washing is carried out, the time is 60 minutes, is taken after terminating
A small amount of relief liquor detected, sees whether pH value reaches setting.
In addition to the implementation, the present invention can also have other embodiment, all employing equivalents or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (7)
1. a kind of central water purifier, including raw water box（1）, raw water pump（2）, more medium filter（3）, active carbon filter
（4）, water softener（5）, accurate filter（6）, NF film filters（8）, high-pressure pump（7）, chlorination equipment（9）And clear water tanks（10）,
Characterized in that, the raw water box（1）Water inlet connects water supply pipe（12）, the raw water box（1）Delivery port connects raw water
Pump（2）Water inlet, the raw water pump（2）Delivery port connection more medium filter（3）Water inlet, the raw water pump exit sets
There is branch road（15）, the branch road（15）With accurate filter（6）Connection, the branch road（15）It is provided with flushing valve（13）, it is described
More medium filter（3）Delivery port connects active carbon filter（4）Water inlet, the active carbon filter（4）Delivery port connects
Water softener（5）Water inlet, the water softener（5）Delivery port connects accurate filter（6）Water inlet, the accurate filter（6）
Delivery port connects NF film filters（8）Water inlet, the NF film filters（8）Delivery port connects high-pressure pump（7）Water inlet, it is described
High-pressure pump（7）Delivery port connects chlorination equipment（9）Water inlet, the chlorination equipment（9）Delivery port connects clear water tanks（10）Water inlet
Mouthful；
The central water purifier also includes purging system, and the purging system includes purge tank（16）, cleaning pump（17）, cleaning
Valve（18）With cleaning pipeline（19）, the purge tank（16）Outlet connection cleaning pump（17）Import, the cleaning pump（17）Outlet
It is provided with purge valve（18）, the cleaning pipeline（19）Connection branch road（15）.
2. central water purifier according to claim 1, it is characterised in that：Described more medium filter（3）Filter core
Aperture is 40um-100um.
3. central water purifier according to claim 1, it is characterised in that：Described accurate filter（6）Using 5 microns
Polypropylene melt blown filter.
4. central water purifier according to claim 1, it is characterised in that：Described water softener（5）It is that ion exchange is soft
Hydrophone.
5. central water purifier according to claim 1, it is characterised in that：Described NF film filters（8）In NF films
Specification be ESNA1-4040 or ESNA1-K1, the NF film filters（8）Bottom is provided with tapping valve（14）.
6. central water purifier according to claim 1, it is characterised in that：Described NF film filters（8）Water inlet
It is provided with flowmeter（11）.
7. the membranous system cleaning method of central water purifier according to claim 1, it is characterised in that：Including following step
Suddenly：
Step one：Under manual mode, the tapping valve of NF film filters bottom is opened, concentrated water drainage is bled off, open running water valve
Allow running water to enter raw water box, then open the flushing valve on branch road, start raw water pump, running water is sent to into NF by branch road
In film filter, the film surface in NF film filters is cleaned, the time is 10-20 minutes；
Step 2：Cleaning solution is prepared, by the sodium tripolyphosphate that mass fraction is 2.0% and the dodecane that mass fraction is 0.8%
Base benzene sulfonic acid sodium salt mixes, and is adjusted by the concentrated sulfuric acid so that the pH value of the solution of mixing puts the cleaning fluid for preparing 10
Enter in the middle of purge tank；
Step 3：In the middle of pass hull closure filter connection valve, close tapping valve and produce water valve, open flushing valve and other
The valve of membranous system is rinsed, starts cleaning pump, the cleaning fluid in the middle of purge tank is sent in cleaning pipeline, initial period, clearly
Washing lotion is back to before NF purge tanks, and initial phegma is emitted, in case the water being detained in system is caused to cleaning solution
Dilution wash cycles, then begin slowly to that flow velocity will be adjusted, and are circulated cleaning, and the time is 30-60 minutes；
Step 4：After terminating according to step 3 cleaning, the tapping valve for opening NF film filters falls cleaning fluid discharge, then running water
Valve and flushing valve, starting raw water pump clear water carries out low-pressure washing, removes residual in accurate filter and NF membrane filters
Chemical substance, discharge and rinse purge tank, then clear water will be filled in purge tank again, clear water is sent to by institute by cleaning pump
In having container, carry out being discharged after low-pressure washing, may be repeated flushing；
Step 5：After membranous system clear water is completely flushed, last low-pressure washing is carried out, the time is 20-60 minutes, after terminating
Take a small amount of relief liquor to be detected, see whether pH value reaches setting.
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