CN104209007A - Flux recovery and maintenance method for water purification filtering element - Google Patents
Flux recovery and maintenance method for water purification filtering element Download PDFInfo
- Publication number
- CN104209007A CN104209007A CN201410462616.0A CN201410462616A CN104209007A CN 104209007 A CN104209007 A CN 104209007A CN 201410462616 A CN201410462616 A CN 201410462616A CN 104209007 A CN104209007 A CN 104209007A
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- China
- Prior art keywords
- water purification
- hollow fiber
- ultrafiltration membrane
- maintenance method
- purification catridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 238000012423 maintenance Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000000746 purification Methods 0.000 title claims abstract description 38
- 230000004907 flux Effects 0.000 title claims abstract description 31
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000001914 filtration Methods 0.000 title abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 39
- 239000012510 hollow fiber Substances 0.000 claims abstract description 37
- 239000012528 membrane Substances 0.000 claims abstract description 37
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 37
- 239000000126 substance Substances 0.000 claims abstract description 19
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 14
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 22
- 239000012498 ultrapure water Substances 0.000 claims description 22
- 238000011010 flushing procedure Methods 0.000 claims description 20
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 244000005700 microbiome Species 0.000 abstract description 2
- 244000052616 bacterial pathogen Species 0.000 abstract 1
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 1
- 239000004800 polyvinyl chloride Substances 0.000 abstract 1
- 239000003643 water by type Substances 0.000 description 3
- 230000001580 bacterial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a flux recovery and maintenance method for a water purification filtering element. According to the characteristics of a hollow fiber ultrafiltration membrane made of a polyvinyl chloride material, primary physical cleaning is performed before delivery; after the water purification filtering element leaves a factory and is used, primary physical cleaning and chemical cleaning are performed respectively every three months; on the premise of guaranteeing the normal working efficiency, impurities caused in a filtering element working process can be timely removed, and the filtering element can be timely protected; substances such as microorganism germs can be also timely removed through regular chemical maintenance, and therefore, the water quality standard is guaranteed, and meanwhile, effects of timely recovering and protecting the flux of the filtering element are achieved; the expenses on frequently replacement of the filtering element by a user are saved; the flux recovery and maintenance method is environmentally friendly, economical and high in practical value.
Description
Technical field
The present invention relates to a kind of maintenance of water treatment water purification catridge, especially relate to a kind of flux recovery and maintenance method of water purification catridge.
Background technology
Quality problem is a large center of gravity on social people's lives basis, at present, the increasing family selection purifier of domestic and foreign department region-by-region carries out the clean water treatment of domestic water, water purifier is the process that the mode of filter core+filtrate carries out purifying waste water mostly, filter core is in long-term use procedure, on the one hand due to the performance of the inner milipore filter of filter core itself, adsorb saturated gradually, often contamination phenomenon can be there is on the other hand in water filtration cleaning system, a primary class is the impurity of filtered residue, one class is the pollution of microorganism in water, a class is also had to be in water body, purify the pollution that medicament causes equipment and filter core.These pollute long term accumulation and not only make the usefulness of filter core and flux decline, and also make the quality of water body be difficult to realize simultaneously.Some family, in order to cost-saving, does not often initiatively carry out the replacing of filter core, or delays to change, and is so not only unfavorable for the purifying water effect of water purifier, works the mischief on the contrary to the healthy of people.
Therefore, a kind of effectively simple flux recovery to water purification catridge and maintenance method are problems being worth research.
Summary of the invention
Goal of the invention: in order to solve problem existing in prior art, the present invention proposes a kind of efficient, the simple flux recovery and the maintenance method that have the water purification catridge of efficient recovery water purification catridge flux.
Technical scheme: to achieve these objectives, the present invention takes following technical scheme: a kind of flux recovery of water purification catridge and maintenance method, described water purification catridge is the hollow fiber ultrafiltration membrane of pvc material, the external diameter of wherein said fiber is 0.5-2.0nm, internal diameter is 0.3-1.4nm, and described flux recovery and maintenance method comprise the following steps:
(1) before dispatching from the factory, a physical cleaning maintenance is carried out to water purification catridge: the hot water adopting 40-60 DEG C, flushing 30min is carried out to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, flushing 10-15min is carried out to PVC hollow fiber ultrafiltration membrane front after flushing;
(2) within use procedure every 3 months, carry out a physical cleaning maintenance: the hot water adopting 40-60 DEG C, just 20min is rinsed to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, backwash 10-15min is carried out to PVC hollow fiber ultrafiltration membrane reverse side after flushing; Repeat 3 times;
(3) within use procedure every 3 months, primary chemical cleaning maintenance is carried out: adopt 40-50 DEG C of ultra-pure water, adding mass concentration is the citric acid of 3%, the hydrogen peroxide of 5%, OIT, often kind of material adding proportion is 10% of ultra-pure water, and water purification catridge is carried out immersion 2-3h; The ultra-pure water taken out after soaking under employing room temperature carries out carrying out backwash 20-30min to PVC hollow fiber ultrafiltration membrane reverse side, more just rinses 10-15min with 40-60 DEG C of hot water to described PVC hollow fiber ultrafiltration membrane front.
Further, described pressure when just rinsing is 0.2-0.35Mpa.
Further, pressure during described backwash is 0.1-0.25Mpa.
Further, the flow just rinsed in described physical cleaning is 2-6 times of the normal working flow of described filter core.
Further, in described physical cleaning, the flow of backwash is 1/2nd of the normal working flow of described filter core.
Further, the flow just rinsed in described Chemical cleaning is 3-5 times of the normal working flow of described filter core.
Further, in described Chemical cleaning, the flow of backwash is 1/3rd of the normal working flow of described filter core.
Beneficial effect: the flux recovery of a kind of water purification catridge provided by the invention and maintenance method, for the feature of the hollow fiber ultrafiltration membrane of pvc material, a physical cleaning is carried out before dispatching from the factory, the every three months after using that dispatches from the factory carries out a physical cleaning and Chemical cleaning respectively, under the prerequisite ensureing normal operating efficiency, the impurity brought in the filter core course of work can be removed timely, filter core is provided simultaneously and protect timely, and the materials such as microbial bacterial also can be removed timely by the maintenance of regular chemistry, also the effect recovering in time and protect is served to the flux of filter core while ensureing water standard, save the expense of the frequent more renew cartridge of user, environmental protection and saving, practical value is strong.
Detailed description of the invention
Embodiment 1:
The flux recovery of water purification catridge and a maintenance method, described water purification catridge is the hollow fiber ultrafiltration membrane of pvc material, and the external diameter of wherein said fiber is 0.5-2.0nm, and internal diameter is 0.3-1.4nm, and described flux recovery and maintenance method comprise the following steps:
(1) before dispatching from the factory, a physical cleaning maintenance is carried out to water purification catridge: the hot water adopting 40 DEG C, flushing 30min is carried out to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, flushing 10min is carried out to PVC hollow fiber ultrafiltration membrane front after flushing;
(2) within use procedure every 3 months, carry out a physical cleaning maintenance: the hot water adopting 40 DEG C, just 20min is rinsed to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, backwash 10min is carried out to PVC hollow fiber ultrafiltration membrane reverse side after flushing; Repeat 3 times;
(3) within use procedure every 3 months, primary chemical cleaning maintenance is carried out: adopt 40 DEG C of ultra-pure waters, adding mass concentration is the citric acid of 3%, the hydrogen peroxide of 5%, OIT, often kind of material adding proportion is 10% of ultra-pure water, and water purification catridge is carried out immersion 2h; The ultra-pure water taken out after soaking under employing room temperature carries out carrying out backwash 20min to PVC hollow fiber ultrafiltration membrane reverse side, more just rinses 10min with 40 DEG C of hot water to described PVC hollow fiber ultrafiltration membrane front.
Wherein, pressure when just rinsing is 0.2Mpa; Pressure during backwash is 0.1Mpa; The flow just rinsed in physical cleaning is 2 times of the normal working flow of described filter core; The flow of backwash is 1/2nd of the normal working flow of described filter core; The flow just rinsed in Chemical cleaning is 3 times of the normal working flow of described filter core; The flow of backwash in Chemical cleaning is 1/3rd of the normal working flow of described filter core.
Embodiment 2:
The flux recovery of water purification catridge and a maintenance method, described water purification catridge is the hollow fiber ultrafiltration membrane of pvc material, and the external diameter of wherein said fiber is 0.5-2.0nm, and internal diameter is 0.3-1.4nm, and described flux recovery and maintenance method comprise the following steps:
(1) before dispatching from the factory, a physical cleaning maintenance is carried out to water purification catridge: the hot water adopting 60 DEG C, flushing 30min is carried out to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, flushing 15min is carried out to PVC hollow fiber ultrafiltration membrane front after flushing;
(2) within use procedure every 3 months, carry out a physical cleaning maintenance: the hot water adopting 60 DEG C, just 20min is rinsed to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, backwash 15min is carried out to PVC hollow fiber ultrafiltration membrane reverse side after flushing; Repeat 3 times;
(3) within use procedure every 3 months, primary chemical cleaning maintenance is carried out: adopt 50 DEG C of ultra-pure waters, adding mass concentration is the citric acid of 3%, the hydrogen peroxide of 5%, OIT, often kind of material adding proportion is 10% of ultra-pure water, and water purification catridge is carried out immersion 3h; The ultra-pure water taken out after soaking under employing room temperature carries out carrying out backwash 30min to PVC hollow fiber ultrafiltration membrane reverse side, more just rinses 15min with 60 DEG C of hot water to described PVC hollow fiber ultrafiltration membrane front.
Wherein, pressure when just rinsing is 0.35Mpa; Pressure during backwash is 0.25Mpa; The flow just rinsed in physical cleaning is 6 times of the normal working flow of described filter core; The flow of backwash is 1/2nd of the normal working flow of described filter core; The flow just rinsed in Chemical cleaning is 5 times of the normal working flow of described filter core; The flow of backwash in Chemical cleaning is 1/3rd of the normal working flow of described filter core.
Embodiment 3:
The flux recovery of water purification catridge and a maintenance method, described water purification catridge is the hollow fiber ultrafiltration membrane of pvc material, and the external diameter of wherein said fiber is 0.5-2.0nm, and internal diameter is 0.3-1.4nm, and described flux recovery and maintenance method comprise the following steps:
(1) before dispatching from the factory, a physical cleaning maintenance is carried out to water purification catridge: the hot water adopting 50 DEG C, flushing 30min is carried out to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, flushing 13min is carried out to PVC hollow fiber ultrafiltration membrane front after flushing;
(2) within use procedure every 3 months, carry out a physical cleaning maintenance: the hot water adopting 50 DEG C, just 20min is rinsed to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, backwash 13min is carried out to PVC hollow fiber ultrafiltration membrane reverse side after flushing; Repeat 3 times;
(3) within use procedure every 3 months, primary chemical cleaning maintenance is carried out: adopt 45 DEG C of ultra-pure waters, adding mass concentration is the citric acid of 3%, the hydrogen peroxide of 5%, OIT, often kind of material adding proportion is 10% of ultra-pure water, and water purification catridge is carried out immersion 2-3h; The ultra-pure water taken out after soaking under employing room temperature carries out carrying out backwash 25min to PVC hollow fiber ultrafiltration membrane reverse side, more just rinses 13min with 50 DEG C of hot water to described PVC hollow fiber ultrafiltration membrane front.
Wherein, pressure when just rinsing is 0.3Mpa; Pressure during backwash is 0.2Mpa; The flow just rinsed in physical cleaning is 4 times of the normal working flow of described filter core; The flow of backwash is 1/2nd of the normal working flow of described filter core; The flow just rinsed in Chemical cleaning is 4 times of the normal working flow of described filter core; The flow of backwash in Chemical cleaning is 1/3rd of the normal working flow of described filter core.
After the flux recovery of use above-described embodiment 1-3 water purification catridge and maintenance method are maintained water purification catridge, filter core flux can recover 60%-80%; The filter core that service life uses compared with conventional bowl using method adds one times; under the prerequisite ensureing normal operating efficiency; the impurity brought in the filter core course of work can be removed timely; filter core is provided simultaneously and protect timely; and the materials such as microbial bacterial also can be removed timely by the maintenance of regular chemistry; also the effect recovering in time and protect is served to the flux of filter core while ensureing water standard; save the expense of the frequent more renew cartridge of user; environmental protection and saving, practical value is strong.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (7)
1. the flux recovery of a water purification catridge and maintenance method, described water purification catridge is the hollow fiber ultrafiltration membrane of pvc material, the external diameter of wherein said fiber is 0.5-2.0nm, and internal diameter is 0.3-1.4nm, it is characterized in that described flux recovery and maintenance method comprise the following steps:
(1) before dispatching from the factory, a physical cleaning maintenance is carried out to water purification catridge: the hot water adopting 40-60 DEG C, flushing 30min is carried out to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, flushing 10-15min is carried out to PVC hollow fiber ultrafiltration membrane front after flushing;
(2) within use procedure every 3 months, carry out a physical cleaning maintenance: the hot water adopting 40-60 DEG C, just 20min is rinsed to PVC hollow fiber ultrafiltration membrane front, to remove front impurity screening; With the ultra-pure water under room temperature, backwash 10-15min is carried out to PVC hollow fiber ultrafiltration membrane reverse side after flushing; Repeat 3 times;
(3) within use procedure every 3 months, primary chemical cleaning maintenance is carried out: adopt 40-50 DEG C of ultra-pure water, adding mass concentration is the citric acid of 3%, the hydrogen peroxide of 5%, OIT, often kind of material adding proportion is 10% of ultra-pure water, and water purification catridge is carried out immersion 2-3h; The ultra-pure water taken out after soaking under employing room temperature carries out carrying out backwash 20-30min to PVC hollow fiber ultrafiltration membrane reverse side, more just rinses 10-15min with 40-60 DEG C of hot water to described PVC hollow fiber ultrafiltration membrane front.
2. the flux recovery of a kind of water purification catridge according to claim 1 and maintenance method, is characterized in that: described pressure when just rinsing is 0.2-0.35Mpa.
3. the flux recovery of a kind of water purification catridge according to claim 1 and maintenance method, is characterized in that: pressure during described backwash is 0.1-0.25Mpa.
4. the flux recovery of a kind of water purification catridge according to claim 1 and maintenance method, is characterized in that: the flow just rinsed in described physical cleaning be the 2-6 of the normal working flow of described filter core doubly.
5. the flux recovery of a kind of water purification catridge according to claim 1 and maintenance method, is characterized in that: the flow of backwash in described physical cleaning is 1/2nd of the normal working flow of described filter core.
6. the flux recovery of a kind of water purification catridge according to claim 1 and maintenance method, is characterized in that: the flow just rinsed in described Chemical cleaning be the 3-5 of the normal working flow of described filter core doubly.
7. the flux recovery of a kind of water purification catridge according to claim 1 and maintenance method, is characterized in that: the flow of backwash in described Chemical cleaning is 1/3rd of the normal working flow of described filter core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462616.0A CN104209007A (en) | 2014-09-11 | 2014-09-11 | Flux recovery and maintenance method for water purification filtering element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462616.0A CN104209007A (en) | 2014-09-11 | 2014-09-11 | Flux recovery and maintenance method for water purification filtering element |
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| CN104209007A true CN104209007A (en) | 2014-12-17 |
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| CN201410462616.0A Pending CN104209007A (en) | 2014-09-11 | 2014-09-11 | Flux recovery and maintenance method for water purification filtering element |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132210A (en) * | 2015-09-02 | 2015-12-09 | 西安热工研究院有限公司 | Cleaning formula for cartridge filter element |
| CN105879693A (en) * | 2016-05-19 | 2016-08-24 | 苏州优斯曼环保科技有限公司 | Maintenance method of water-purifying filtering core |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009039677A (en) * | 2007-08-10 | 2009-02-26 | Toray Ind Inc | Cleaning method of immersion type membrane module and immersion type membrane filtering apparatus |
| US20090200234A1 (en) * | 2008-02-11 | 2009-08-13 | Ecolab Inc. | Methods for cleaning surfaces with activated oxygen |
| WO2011071047A1 (en) * | 2009-12-07 | 2011-06-16 | 三井造船株式会社 | Method for cleaning membrane cartridge for ballast water treatment and method for cleaning filter |
| CN202010520U (en) * | 2011-03-16 | 2011-10-19 | 上海依科绿色工程有限公司 | Off-line cleaning device for reverse osmosis membrane |
| CN103537193A (en) * | 2013-11-05 | 2014-01-29 | 苏州腾纳环保科技有限公司 | Method for washing ultra-filtration membrane component |
| CN103551042A (en) * | 2013-11-05 | 2014-02-05 | 苏州腾纳环保科技有限公司 | Maintenance method of water purifying filter element |
-
2014
- 2014-09-11 CN CN201410462616.0A patent/CN104209007A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009039677A (en) * | 2007-08-10 | 2009-02-26 | Toray Ind Inc | Cleaning method of immersion type membrane module and immersion type membrane filtering apparatus |
| US20090200234A1 (en) * | 2008-02-11 | 2009-08-13 | Ecolab Inc. | Methods for cleaning surfaces with activated oxygen |
| WO2011071047A1 (en) * | 2009-12-07 | 2011-06-16 | 三井造船株式会社 | Method for cleaning membrane cartridge for ballast water treatment and method for cleaning filter |
| CN202010520U (en) * | 2011-03-16 | 2011-10-19 | 上海依科绿色工程有限公司 | Off-line cleaning device for reverse osmosis membrane |
| CN103537193A (en) * | 2013-11-05 | 2014-01-29 | 苏州腾纳环保科技有限公司 | Method for washing ultra-filtration membrane component |
| CN103551042A (en) * | 2013-11-05 | 2014-02-05 | 苏州腾纳环保科技有限公司 | Maintenance method of water purifying filter element |
Non-Patent Citations (1)
| Title |
|---|
| 于海琴: "《膜技术及其在水处理中的应用》", 30 September 2011, 中国水利水电出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132210A (en) * | 2015-09-02 | 2015-12-09 | 西安热工研究院有限公司 | Cleaning formula for cartridge filter element |
| CN105879693A (en) * | 2016-05-19 | 2016-08-24 | 苏州优斯曼环保科技有限公司 | Maintenance method of water-purifying filtering core |
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Application publication date: 20141217 |
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