CN103055701B - Cleanable security filter and its application - Google Patents
Cleanable security filter and its application Download PDFInfo
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- CN103055701B CN103055701B CN201110316462.0A CN201110316462A CN103055701B CN 103055701 B CN103055701 B CN 103055701B CN 201110316462 A CN201110316462 A CN 201110316462A CN 103055701 B CN103055701 B CN 103055701B
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Abstract
The invention relates to a security filter that can realize online automatic backwashing and its application. The invention solves the technical problems that currently used filter elements in industry have low filter precision, are easy to cause deep pollution, and cannot achieve long-term use through automatic cleaning. The security filter provided in the invention can mainly be used for a double-membrane system in the field of wastewater treatment by a membrane method, such as the security filtering measures in ultrafiltration and reverse osmosis systems, and also can be applied to circulating water replenishing and other water treatment processes with high requirements for filter precision and effluent water quality. The security filter can be used as an effective pretreatment filter means to reduce the influence of particles in water or water quality change caused by inflow water impact on stable running of follow-up processes, so that the effluent water quality can be improved to meet following water use requirements.
Description
Technical field
The present invention relates to a kind of cartridge filter and the application system thereof that can be implemented in line automatic back-washing, belong to embrane method sewage disposal and reuse technology field.
Background technology
In recent years, along with increasingly sharpening and the continuous reinforcement of law enforcement for environmental protection dynamics of shortage of fresh water problem, water-saving and emission-reducing correlation technique obtains further promotion and application in the commercial Application of reality, wherein sewage deep reuse technology---and membrane separation technique is developed rapidly and has been applied in various fields under existing technical conditions.Membrane separation technique has become solution current energy source, resources and environment problem in a sense, one of technical foundation realizing sustainable development.In China, along with the introduction of membrane technology and going deep into of research work, membrane technology starts in chemical wastewater treatment, seawater, brackish water desalination, the field extensive uses such as environmental pollution improvement.
Membrane technology, as a kind of physical separating process, does not need undergo phase transition and add auxiliary agent.Therefore have that the loss of processed object active principle is little, operation operation energy consumption is low, contamination of products degree is little, to selective height, the strong adaptability of handling object, be easy to the advantages such as automation.But membrane aperture is generally less than 1 μm, because its processing accuracy is high, therefore membrane pollution problem is one of principal element affecting application of membrane.Therefore, in order to protect membranous system and extend working time, usually to arrange in membranous system technique and security personnel's filter is installed.
Filter core of security filter conventional in current industry adopts melt-blown or foldable filter element mostly, and filter type is grossflow filtration, and pollutant is trapped in the surface of filter core.Along with increasing of surface contaminant, the flux of filter core can decline to a great extent, and the filter core in filter cannot realize both surface filtration due to the defect of manufacturing technology itself, easily causes the degree of depth to be polluted.When flux drops to a certain degree, being reacted on cartridge filter is exactly that operating pressure raises, effluent quality is deteriorated, at this moment just must more renew cartridge, and operation and maintenance cost is raised.
There is following shortcoming in the filter core applied in current industrial membrane device: (1) filter core self preparation technology existing defects makes filter core aperture excessive (being generally about 5 μm), and pore-size distribution is uneven, causes filter element filtering precision not high; (2) because filter core manufacturing technical feature determines that filter core cannot realize surface filtration, easy Formation Depth pollutes; (3) existing industrial filter core life cycle is shorter, and along with the fluctuation entering water water quality, general 2 week by 1 month not etc., cannot use for a long time, and frequently more renew cartridge causes increasing considerably of operating cost and cost of labor.
For current filter core of security filter Problems existing in actual applications, Formation Depth as easy in filter core pollutes, filtering accuracy is not high, the problems such as the fluctuation of water water quality impact is large are entered in operating process, there is the cartridge filter adopting compressed air to carry out backwash at present, but it is higher to compressed-air actuated pressure requirements on the one hand to adopt compressed air to carry out backwash, pressure is excessive, easy damage filter core, the too small object that cannot reach backwash of pressure, in addition, facts have proved, the effect that employing compressed air carries out backwash is bad, air is difficult to the impurity that filter core adheres to blow away completely.
Therefore, the invention provides a kind of novel cartridge filter that can be implemented in line automatic back-washing, and its application process is provided.
Summary of the invention
For solving the problem, the invention provides a kind of novel cartridge filter and the application process thereof that can be implemented in line automatic back-washing, this cartridge filter can not only improve in existing industrial membrane device because of the various problems brought of security personnel's filter core, and greatly can improve operation and the replacement cycle of filter core, reduce the existing pair of operating operation and maintenance cost of film device.
Cartridge filter of the present invention comprises the filter body that inside is provided with multiple filter core, be respectively arranged with outlet valve in the water side of filter body and water inlet end and enter water valve, filter body simultaneously is also provided with and cleans into water valve and cleaning outlet valve, describedly clean the water side and the water intake end that are separately positioned on filter body into water valve and cleaning outlet valve;
In addition, described cartridge filter water intake end and water side are provided with pressure sensor.
Multiple filter cores in described filter body are centered by the center of filter body cross section, and be centrosymmetric and be longitudinally arranged in filter body, filter core length is identical with filter body length;
Described enter water valve be arranged on oral siphon, described cleaning outlet valve be arranged on cleaning outlet pipe on, described oral siphon and cleaning outlet pipe be all connected on the water inlet end of filter body;
Described outlet valve is arranged on outlet pipe, and the described water valve that cleans is arranged on cleaning oral siphon, and described outlet pipe and cleaning oral siphon are all connected on the water side of filter body;
Described pressure sensor is separately positioned on oral siphon and outlet pipe;
Described filter core comprises mandrel and is evenly distributed on the axial hollow fibre filament of core, and the two ends of described mandrel arrange water-locator respectively, and the water distributing pore of described water-locator connects with the end face of hollow fibre filament; The two ends of described mandrel, also arrange the end cover that there is through hole centre outside water-locator respectively.
Wherein, described hollow fibre filament utilizes film silk distributor to be divided into some parts to be evenly distributed to around mandrel, then by epoxy resin and curing agent according to 1:0.5-1:2.5, the two ends that the mass ratio of preferred 1:1 mixes Post RDBMS hollow fibre filament obtain.
Described water-locator is made up of the one group of concentric circles had by axle center connecting line, and the space between each concentric circles, between concentric circles and connecting line forms described water distributing pore.
Concrete, the visible accompanying drawing 2 of described cartridge filter structure, eight filter cores are provided with in tubular filter body, be respectively arranged with outlet valve in the water side of filter body and water inlet end and enter water valve, described filter body is also provided with simultaneously and cleans into water valve and cleaning outlet valve, describedly clean the water side and the water intake end that are separately positioned on filter body into water valve and cleaning outlet valve; In addition, described cartridge filter water intake end and water side are provided with pressure sensor.
Described water inlet end also comprises branch's inlet channel water inlet being introduced each filter core, and described branch inlet channel is communicated with respectively with inlet channel;
Concrete, shown in the visible accompanying drawing 1 of structure of the filter core of described cartridge filter, described filter core comprises mandrel and is evenly distributed on the axial hollow fibre filament of core vertically, and the two ends of described mandrel arrange water-locator respectively, and the water distributing pore of described water-locator connects with the end face of hollow fibre filament; The two ends of described mandrel, also arrange end cover outside water-locator respectively;
Described water-locator is made up of the one group of concentric circles had by axle center connecting line, and the space between each concentric circles, between concentric circles and connecting line forms described water distributing pore.
Wherein, described material for core can select following in one or more: polysulfones, polyimides, PEI, Kynoar class, polytetrafluoroethylene (PTFE), TPO, polyvinyl chloride, or the blend film of preceding sections composite;
Wherein, described polysulfones comprises: bisphenol-a polysulfone, polyether sulfone, phenolic polyether sulphone, phenolphthalein type polyether-ketone.
Described TPO mainly comprises polyethylene, polypropylene, hydrophilic modifying polyethylene, hydrophilic modifying polypropylene etc.; Preferably carry out the organic film material of hydrophilic modifying, as polyethylene, polypropylene, polyvinyl chloride, polyether sulfone, Kynoar, the polytetrafluoroethylene (PTFE) of hydrophilic modifying.
The pore diameter range of described filter core hollow fibre filament is 0.5-5 μm, and preferred pore diameter range is 1-2 μm.
The flux selection gist of described filter core is the pure water flux under 0.1MPa, and magnitude range is 500-2000L/m
2h, wherein preferred filter core flux is 800-1500L/m
2h.
The epoxy resin solidified under the preparation employing normal temperature condition of described filter core and curing agent, the proportion of the two is 1:0.5-1:2.5, and wherein preferred epoxy resin and curing agent ratio are 1:1.
Water inlet in described filter core and product water-stop mode all adopt O type circle to seal.
The present invention also provides the safety filter system adopting above-mentioned cartridge filter, to solve the problem mentioned in background technology, briefly, the present invention selects pressure controlled automatic control program, for the cartridge filter that the present invention is above-mentioned, increase online backwashing system and judge to realize automatic back-washing program to operating pressure, existing security personnel can be overcome and filter Problems existing.
Safety filter system of the present invention, (see figure 3) is formed: two groups of cartridge filter (E-1 by with lower component, E-2), the water side of each cartridge filter connects with pipeline mutually, and this pipeline is connected with total outlet pipe simultaneously, the pipeline that described and total outlet pipe is connected sets out respectively water valve (V-2A and V-2B) and delivery port pressure sensor (P-2A and P-2B); The pipeline simultaneously connecting water side is communicated with respectively with cleaning oral siphon, this path is arranged respectively and cleans into water valve (V-3A and V-3B);
The water intake end of described two groups of cartridge filters (E-1, E-2) is connected with pipeline with total oral siphon respectively, the pipeline that described and total oral siphon is connected sets into respectively water valve (V-1A and V-1B) and water inlet pressure sensor (P-1A and P-1B); Meanwhile, the water intake end of described two groups of cartridge filters (E-1, E-2) is connected with total oral siphon respectively with another path, this path is arranged respectively cleaning outlet valve (V-4A and V-4B).
Adopt safety filter system of the present invention, carry out setting according to different quality the delivery port, the water inlet pressure differential that start to carry out backwash and stop delivery port, the water inlet pressure differential of backwash.
In general, the delivery port of backwash, water inlet pressure differential is started to carry out for being more than or equal to 0.1MPa; Stop the delivery port of backwash, water inlet pressure differential for being less than or equal to 0.02MPa;
During normal operation, clean and close into water valve and cleaning outlet valve, enter water valve and outlet valve is opened, when pressure sensor monitoring reaches setting value (being generally 0.1MPa) to Inlet and outlet water pressure reduction, program carries out valve transfer automatically, closes into water valve and outlet valve, open and clean into water valve and cleaning outlet valve, start to carry out on-line auto-cleaning, the general cleaning water yield is 1.5 ~ 2 times of normal water yield, and scavenging period is generally 3 ~ 5min.After cleaning, pressure reduction generally can return to below 0.02MPa.Can continue after EP (end of program) to be cleaned to run.
Application technology scheme of the present invention preferably adopts two groups can be implemented in, and filter that line cleans automatically carries out commercial Application, the mode controlled mainly through pressure reduction carries out security personnel's operation of filter and the switching of cleaning, and the performance recovery of the cartridge filter after cleaning judges mainly through the pressure reduction of running status.
The essential distinction of the present invention and prior art is mainly, the cartridge filter of on-line automatic backwash adopts pressure to judge scavenging period, prevents filter core of security filter from running due to long-time continuous the degree of depth caused and pollutes.After cleaning, filter core flux recovery, pressure reduction reduce, and effectively can extend the replacement cycle of filter core, reduce operation and maintenance cost.
The invention has the beneficial effects as follows:
The cartridge filter of on-line automatic backwash adopts pressure to judge scavenging period, prevents filter core of security filter from running due to long-time continuous the degree of depth caused and pollutes.After cleaning, filter core flux recovery, pressure reduction reduce, and effectively can extend the life cycle of filter core, reduce operation and maintenance cost.
Accompanying drawing explanation
Fig. 1 is filter cartridge construction schematic diagram; Wherein, 6-hollow fibre filament; 7-water-locator; 8-end cover; 9-water distributing pore.
Fig. 2 is novel cartridge filter agent structure; Wherein, 1-pressure sensor; 2-enters water valve; 3-outlet valve; 4-cleans into water valve; 5-cleans outlet valve.
Fig. 3 is the application schematic diagram of cartridge filter in commercial plant.Wherein, E-1, E-2 are respectively cartridge filter; P-1A, P-1B are respectively water inlet pressure sensor; P-2A, P-2B are respectively delivery port pressure sensor; V-1A, V-1B are respectively into water valve; V-2A, V-2B are respectively outlet valve; V-3A, V-3B are respectively and clean into water valve; V-4A, V-4B are respectively cleaning outlet valve.
Detailed description of the invention
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
embodiment 1
Novel security personnel's filter element for filtration in the present embodiment adopts PTFE hollow-fibre membrane as main material, the PTFE hollow fiber microfiltration membrane selected is that outer surface is relatively fine and close, the average pore size of microfiltration membranes is 1 μm, pore size distribution range is 0.5-1.5 μm, the length of security personnel's filter core is 1m, and the effective film area of each assembly is 5m
2, the treating capacity of single filter core is 3-5t/h, and the ratio adopting normal temperature epoxy resin and curing agent is use after 1:1.5 is cured end-blocking.The mode that filter core and cartridge filter adopt O type circle to seal is with by water inlet with produce water, backwash water and rinse water and isolate.Filter cartridge construction and cartridge filter structure are shown in Fig. 1 and 2 respectively.
Adopt safety filter system (see figure 3) of the present invention:
Two groups of cartridge filter E-1, E-2, the water side of each cartridge filter E-1, E-2 connects with pipeline mutually, and each pipeline is connected with total outlet pipe, the pipeline that described and total outlet pipe is connected sets out respectively water valve (V-2A and V-2B) and delivery port pressure sensor (P-2A and P-2B) simultaneously; The pipeline simultaneously connecting water side is communicated with respectively with cleaning oral siphon, this path is arranged respectively and cleans into water valve (V-3A and V-3B);
The water intake end of described two groups of cartridge filter E-1, E-2 is connected with pipeline with total oral siphon respectively, the pipeline that described and total oral siphon is connected sets into respectively water valve (V-1A and V-1B) and water inlet pressure sensor (P-1A and P-1B); Meanwhile, the water intake end of described two groups of cartridge filter E-1, E-2 is connected with total oral siphon respectively with another path, this path is arranged respectively cleaning outlet valve (V-4A and V-4B).
After certain petrochemical plant production waste process, water outlet is as entering water.During driving, A, B two overlaps cartridge filter and uses simultaneously, opens V-1A, V-1B, V-2A, V-2B, closes V-3A, V-3B, V-4A, V-4B.Through the operation of 11 days, the pressure reduction between P-2A and P-1A reached setting value 0.1MPa.Now, close V-1A, V-2A, open V-3A, V-4A, produce water with the ultrafiltration in follow-up pair of membrane process and carry out backwash, scavenging period 3min.Close V-3A, V-4A after cleaning, open V-1A, V-2A, now cartridge filter A recovers normal operation, and inlet pressure sensor pressure reduction returns to 0.02MPa.After 13 days, the pressure reduction between P-2B and P-1B reaches setting value 0.1MPa.Now, close V-1B, V-2B, open V-3B, V-4B, produce water with the ultrafiltration in follow-up pair of membrane process and carry out backwash, scavenging period 3min.Close V-3B, V-4B after cleaning, open V-1B, V-2B, now cartridge filter B recovers normal operation, and inlet pressure sensor pressure reduction returns to 0.02MPa.Continuous operation is after 102 days, and after filter element cleaning, pressure reduction is more than 0.08MPa, now shuts down more renew cartridge.
embodiment 2
Novel security personnel's filter element for filtration in the present embodiment adopts the chief component of the PVC hollow fiber membrane cartridge of hydrophilic modifying, the hydrophily PVC hollow fiber microfiltration membrane selected is that outer surface is relatively fine and close, the average pore size of microfiltration membranes is 0.5 μm, pore size distribution range is 0.1-1.0 μm, the length of security personnel's filter core is 1m, and the effective film area of each assembly is 8m
2, the treating capacity of single filter core is 4-6t/h, and the ratio adopting normal temperature epoxy resin and curing agent is use after 1:1 is cured end-blocking.The mode that filter core and cartridge filter adopt O type circle to seal is with by water inlet with produce water, backwash water and rinse water and isolate.Filter cartridge construction and cartridge filter structure are shown in Fig. 1 and 2 respectively.
Adopt safety filter system (see figure 3) of the present invention:
After certain municipal sewage plant process, outer draining is as entering water.During driving, A, B two overlaps cartridge filter and uses simultaneously, opens into water valve V-1A, V-1B, V-2A, V-2B, closes V-3A, V-3B, V-4A, V-4B.Through the operation of 8 days, the pressure reduction between P-2B and P-1B reached setting value 0.15MPa.Now, close V-1B, V-2B, open V-3B, V-4B, produce water with the ultrafiltration in follow-up pair of membrane process and carry out backwash, scavenging period 5min.Close V-3B, V-4B after cleaning, open V-1B, V-2B, now cartridge filter B recovers normal operation, and inlet pressure sensor pressure reduction returns to 0.02MPa.After 9 days, the pressure reduction between P-2A and P-1A reaches setting value 0.15MPa.Now, close V-1A, V-2A, open V-3A, V-4A, produce water with the ultrafiltration in follow-up pair of membrane process and carry out backwash, scavenging period 5min.Close V-3A, V-4A after cleaning, open V-1A, V-2A, now cartridge filter A recovers normal operation, and inlet pressure sensor pressure reduction returns to 0.02MPa.Continuous operation is after 162 days, and after filter element cleaning, pressure reduction is more than 0.13MPa, now shuts down more renew cartridge.
Claims (5)
1. a cartridge filter, comprise the filter body that inside is provided with multiple filter core, described multiple filter core is centered by the cross-section center of filter body, symmetrically longitudinally be arranged in filter body, be respectively arranged with outlet valve and enter water valve in the water side of filter body and water inlet end, described outlet valve is arranged on outlet pipe, described in enter water valve and be located on oral siphon, it is characterized in that
Described filter body is also arranged and cleans into water valve and cleaning outlet valve, described cleaning is separately positioned on water side and the water intake end of filter body into water valve and cleaning outlet valve;
The described water valve that cleans is arranged on cleaning oral siphon, and described cleaning outlet valve is arranged on cleaning outlet pipe, makes described cartridge filter can realize on-line automatic backwash,
Meanwhile, described cartridge filter water intake end and water side are equipped with pressure sensor, and described pressure sensor is located on oral siphon and outlet pipe respectively,
Described oral siphon and cleaning outlet pipe are all connected on the water inlet end of filter body; Described outlet pipe and cleaning oral siphon are all connected on the water side of filter body;
Described cartridge filter, is characterized in that, described filter core comprises mandrel and is evenly distributed on the axial hollow fibre filament of core vertically, and the two ends of described mandrel arrange water-locator respectively, and the water distributing pore of described water-locator connects with the end face of hollow fibre filament; The two ends of described mandrel, also arrange the end cover that there is through hole centre outside water-locator respectively,
Described hollow fibre filament utilizes film silk distributor to be divided into some parts to be evenly distributed to around mandrel, then obtained at the two ends that epoxy resin and curing agent mix Post RDBMS hollow fibre filament according to the mass ratio of 1:0.5-1:2.5, the water inlet in described filter core and product water-stop mode all adopt O type circle to seal.
2. cartridge filter as claimed in claim 1, it is characterized in that, filter core length is identical with filter body length.
3. cartridge filter as claimed in claim 1, it is characterized in that, described water-locator is made up of the one group of concentric circles had by axle center connecting line, and the space between each concentric circles, between concentric circles and connecting line forms described water distributing pore.
4. cartridge filter as claimed in claim 1, it is characterized in that, the material of described filter core can select following in one or more: polysulfones, polyimides, PEI, Kynoar class, the blend film of polytetrafluoroethylene (PTFE), TPO, polyvinyl chloride or preceding sections material;
Wherein, described polysulfones comprises: bisphenol-a polysulfone, polyether sulfone, phenolic polyether sulphone, phenolphthalein type polyether-ketone;
Described TPO comprises polyethylene, polypropylene, hydrophilic modifying polyethylene, hydrophilic modifying polypropylene.
5. adopt as arbitrary in claim 1-4 as described in the safety filter system of cartridge filter, it is characterized in that, form by with lower component:
Two groups of cartridge filters, the water side of each cartridge filter connects with pipeline, and this pipeline is connected with total outlet pipe simultaneously, the pipeline that described and total outlet pipe is connected is arranged respectively an outlet valve and a discharge pressure sensor; The pipeline simultaneously connecting water side is communicated with respectively with cleaning oral siphon, this path is arranged respectively and cleans into water valve;
The water intake end of described two groups of cartridge filters is connected with pipeline with total oral siphon respectively, the pipeline that described and total oral siphon is connected is arranged respectively one and enters water valve and a water entry pressure sensor; Meanwhile, the water intake end of described two groups of cartridge filters is connected with total oral siphon respectively with another path, and this path arranges cleaning outlet valve respectively,
Described safety filter system, carrying out setting according to different quality the delivery port, the water inlet pressure differential that start to carry out backwash and stops delivery port, the water inlet pressure differential of backwash: starting to carry out the delivery port of backwash, water inlet pressure differential as being more than or equal to 0.1MPa; Stop the delivery port of backwash, water inlet pressure differential for being less than or equal to 0.02MPa,
When pressure sensor monitoring reaches setting value to the Inlet and outlet water pressure reduction of delivery port, water inlet, start to carry out on-line auto-cleaning, the general cleaning water yield is 1.5 ~ 2 times of normal water yield, and scavenging period is generally 3 ~ 5min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110316462.0A CN103055701B (en) | 2011-10-18 | 2011-10-18 | Cleanable security filter and its application |
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|---|---|---|---|
| CN201110316462.0A CN103055701B (en) | 2011-10-18 | 2011-10-18 | Cleanable security filter and its application |
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| CN103055701A CN103055701A (en) | 2013-04-24 |
| CN103055701B true CN103055701B (en) | 2015-05-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103224307B (en) * | 2013-04-28 | 2015-05-06 | 浙江晶泉水处理设备有限公司 | Continuous electro-adsorption process-based sea water desalination apparatus |
| WO2018106986A1 (en) * | 2016-12-09 | 2018-06-14 | Evoqua Water Technologies Llc | Control system for optimizing mixing and energy usage for mixing systems |
| CN108421296A (en) * | 2018-02-13 | 2018-08-21 | 佛山市澳霆环境设备制造有限公司 | A kind of filter auto-cleaning structure thereof |
| CN112587989B (en) * | 2020-09-01 | 2022-12-27 | 中国科学院上海应用物理研究所 | Filter element device, filter and application thereof |
| CN112717703B (en) * | 2020-12-10 | 2021-10-15 | 哈尔滨乐普实业有限公司 | Multifunctional separation membrane cleaning device and cleaning method |
| TWI734659B (en) * | 2021-02-09 | 2021-07-21 | 上品綜合工業股份有限公司 | Fluororesin filter device, unit and its manufacturing method |
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| TW536424B (en) * | 2001-09-05 | 2003-06-11 | Mitsubishi Rayon Co | Water-clean cartridge, water-cleaner, and washing method of water-cleaner |
| US20070163942A1 (en) * | 2006-01-19 | 2007-07-19 | Toray Industries, Inc. | Hollow fiber membrane module |
| CN201524526U (en) * | 2009-09-21 | 2010-07-14 | 江苏金山环保工程集团有限公司 | Filtering device using hollow fiber ultrafiltration membrane |
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