CN204162533U - The device of coagulation-microfiltration membrane integral system process villages and small towns tap water - Google Patents
The device of coagulation-microfiltration membrane integral system process villages and small towns tap water Download PDFInfo
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- CN204162533U CN204162533U CN201420579698.2U CN201420579698U CN204162533U CN 204162533 U CN204162533 U CN 204162533U CN 201420579698 U CN201420579698 U CN 201420579698U CN 204162533 U CN204162533 U CN 204162533U
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Abstract
The utility model relates to the device of a kind of coagulation-microfiltration membrane coupling integration apparatus process villages and small towns tap water, comprise coagulating system, permeate loop and retain district, coagulating system comprises water-in, water outlet, dosing mouth, agitator and coagulating tank body, retain district and comprise surge pump, under meter, back flushing water-in and reflux line, infiltration loop comprises membrane module water-in, membrane module water outlet and hollow-fibre membrane external-compression type assembly, hollow-fibre membrane external-compression type component bottom is provided with membrane module water-in, side is provided with membrane module water outlet, described membrane module water-in passes through under meter successively, surge pump connects the water outlet of coagulating system, the water-in of coagulating system connects hollow-fibre membrane external-compression type assembly top by reflux line, hollow-fibre membrane external-compression type component bottom water inlet connects back flushing water-in.The utility model can the effective pollutent such as removal heavy metal, organism and fluorine arsenic, reduces cost of investment, and stable water outlet, be easy to safeguard.
Description
Technical field
The utility model belongs to environmental technology field, relates to the purification techniques containing organism, high fluorine and arsenic water body, the device of specifically a kind of coagulation-microfiltration membrane integral system process villages and small towns tap water.
Background technology
Along with development and the growth in the living standard of society, people require more and more stricter to drinking-water quality.But the pollution of waterhead of current earth's surface is but very serious, and conventional water treatment method can not meet the demands, and must develop new water technology.Along with the progress of membrane technique, it is found that the low voltage operated membrane separating process comprising micro-filtration and ultrafiltration can meet the demands.Membrane technique is called as " water technology of 21st century ", has broad application prospects in clean water treatment.The feature of membrane separation technique to provide reliable and stable water quality, and this is because the cardinal principle of membrane sepn impurities in water is mechanical grading, and thus effluent quality is only according to the size of membrane pore size, has nothing to do with raw water quality and operational conditions.In addition, membrane sepn also Hui Shi water factory land used reduces greatly, operation automatization, makes water factory become " making water conservancy project factory " truly.
In water treatment by membrane, conventional film mainly contains four classes: microfiltration membrane (MF), ultra-filtration membrane (UF), nanofiltration membrane (NF), reverse osmosis membrane (RO).Micro-filtration is a kind of membrane process quite similar with the coarse filtration of routine.Millipore filtration has relatively more neat, uniform vesicular structure, and aperture is 0.05 ~ 10 μm, making filtration be transitioned into accurate absolute property from generally only having more coarse relative character, being mainly used in and retaining suspension and emulsion.Ultrafiltration is a kind of process between micro-filtration and nanofiltration, membrane pore size scope be 0.05 μm (close to micro-filtration) to 1nm(close to nanofiltration), the typically used of ultrafiltration is from solution, be separated macromolecular substance and colloid.Nanofiltration is the membrane separation technique between ultrafiltration and reverse osmosis, can be separated small organic molecule etc. with water, inorganic salt, meets desalination with concentrated simultaneously; Reverse osmosis technology these materials and water can not be separated through semi-permeable membranes according to other materials under the effect higher than solution osmotic pressure, effectively can remove the dissolved salts in water.What practical application was more is reverse osmosis membrane and nanofiltration membrane, but reverse osmosis is technique prepared by seawater cleaning and ultrapure water, except working pressure is high, beyond energy expenditure is large, because process water " purity " is too high, the mineral substance making water total and the ion useful to human body can not retain, so whether water purification is suitable in this way, have become a problem of arguement at present.Compared with reverse osmosis, ultrafiltration and micro-filtration method due to working pressure low, energy expenditure is little, gets more and more abroad in recent years as the investigation and application of the alternative method of conventional water treatment.Because the effluent quality of micro-filtration is closer to the standard of Urban Water, its applied research more receives publicity.
And coagulation process is as preposition link indispensable in water treatment technological process, the quality of its effect often determines treatment effect, the operation condition, finally water quality and water producing cost of subsequent process flow, therefore it is very important research and development field in water treatment, is the focus of research at present.Organism in natural water body can be divided into suspended state, colloid and solubilised state three kinds, and suspended state and colloid part normally molecular weight are comparatively large, the part that solubleness is less, can adsorb by minute solid particles.Their cutting mechanisms is similar to the cutting mechanisms of particulate matter, is namely caught precipitation removed by electrical counteract, adsorption bridging, net, and this part organism is removed easily via conventional water treatment process.
In sum, the micro-filtration in membrane technique and ultrafiltration are mainly used in removing solia particle; Nanofiltration has good removal effect to small-molecular-weight organism and salt; Reverse osmosis can only remove the salinity in water, and can not remove the organism in water, and some high valence ion and organism also can polluted membranes, cause only can not meeting water quality requirement with membrane technique process waste water.Not easily adsorbed by the hydrolysate of coagulating agent because the organism that water middle-molecular-weihydroxyethyl is less, solubleness is larger has good wetting ability, under general coagulation condition, clearance is very low, therefore, in the urgent need to a kind of coupling treatment process.
Summary of the invention
For above-mentioned deficiency, the purpose of this utility model is the device providing coagulation-microfiltration membrane integral system process villages and small towns tap water.Because hollow-fibre membrane is without supporter, there is very large filling density, in unit volume, can a lot of membrane areas be held, so select HQM series polypropylenes hollow-fibre membrane and the series modified ps hollow fiber uf membrane of HQM in the utility model.This device not only can the effective pollutent such as removal heavy metal, organism and fluorine arsenic, reduces the pollution to receiving water body, is also beneficial to the intensive of device simultaneously and reduces cost of investment.
The device of the coagulation proposed in the utility model-microfiltration membrane combined system process villages and small towns tap water, comprise coagulating system, infiltration loop and retain district, wherein: coagulating system comprises water-in 1, water outlet 2, dosing mouth 4, agitator 5 and coagulating tank body 3, coagulating tank body 3 one upper lateral part is provided with dosing mouth 4, two bottom sides is respectively equipped with water-in 1 and water outlet 2, is provided with agitator 5 in it; Retain district and comprise surge pump 6, under meter 7, back flushing water-in 11 and reflux line 12, infiltration loop comprises membrane module water-in 8, membrane module water outlet 10 and hollow-fibre membrane external-compression type assembly 9, membrane module water-in 8 is provided with bottom hollow-fibre membrane external-compression type assembly 9, side is provided with membrane module water outlet 10, described membrane module water-in 8 connects the water outlet 2 of coagulating system successively by under meter 7, surge pump 6, the water-in 1 of coagulating system connects hollow-fibre membrane external-compression type assembly 9 top by reflux line 12; Bottom hollow-fibre membrane external-compression type assembly 9, water inlet connects back flushing water-in 11.
In the utility model, described agitator 5 is variable speed stirrer.
The working method of the device of the coagulation that the utility model proposes-microfiltration membrane combined system process villages and small towns tap water, concrete steps are as follows:
Pretreated villages and small towns tap water is flowed into the pre-treatment of coagulation district by water-in, coagulation compound is dropped at dosing mouth, mix with variable speed stirrer, water sample and coagulating agent fully react, catching the mechanisms such as volume is swept, adsorption bridging by compression double electric layer, electrical counteract, net makes water-borne glue body, suspended particle etc. form flco, change the distribution of sizes of suspended particle in former water, the macromolecular substance such as effective organics removal, and the mechanism of action removing fluorine arsenic is:
(1) adsorb; it is electrostatic adhesion that coagulant flocculation sediment removes fluorine arsenic process; fluorine-containing arsenic flco is owing to having adsorbed charged fluorine arsonium ion, and positive charge is partially neutralized, and forms molecular adsorption above sodium ion and hydrogen ion are adsorbed onto as charge balance ion;
(2) ion-exchange.The radius of fluorion and hydroxide radical electric charge is all close, and wherein OH mono-and F mono-exchange, and this is the important mode of action of of high performance agent for removing fluorin;
(3) complex-precipitation.Fluorine arsonium ion can form fluorine arsenic complexing ion group with aluminium, calcium, magnesium, iron plasma, can form multiple complex compound and settle down, just reliably can go the effect of removing fluorine in water arsenic with a small amount of coagulating agent in flocculation process.
Pretreated water sample is flowed through hollow fiber microfiltration membrane by surge pump, surge pump promotes its circulating in a device, aqueous sample stream is after microfiltration membrane, part permeate enters next treatment unit, another part condensed water is then back to coagulation district, and back flushing is regularly carried out to extend its work-ing life to microfiltration membrane, backwashing water is back to coagulation district.Whole process realizes the adjustment to operation conditions by pressure control system.Coagulating agent remove small-particle and dissolubility pollutant mainly sink to bottom coagulation district, in question response device coagulating agent absorption saturated after, open bottom gate, collect and do individual curing.
In the utility model, the pre-treatment of water sample refers to: filter, precipitate the suspended impurity removed in waste water.
In the utility model, described pollutent refers at least one in heavy metal, organism and fluorine arsenic.
the beneficial effects of the utility model are:
The utility model compared with prior art, remarkable advantage is: membrane technique and coagulation process are in conjunction with coupling, in order to reduce the processing load of film, improve the removal effect to heavy metal, organism and dissolved matter etc. in water, effective control delivery turbidity, ensure the biological safety of water outlet, have huge technology and economic advantages.
Accompanying drawing explanation
Fig. 1 is device schematic diagram of the present utility model.
Number in the figure: 1 is water-in, 2 is water outlet, and 3 is coagulating tank body, and 4 is dosing mouth, 5 is variable speed stirrer, and 6 is surge pump, and 7 is under meter, and 8 is membrane module water-in, 9 is hollow-fibre membrane external-compression type assembly, and 10 is membrane module water outlet, and 11 is back flushing water-in, and 12 is reflux line.
Embodiment
Further illustrate the utility model by the following examples.
Embodiment 1: as shown in Figure 1, described device is by coagulating system, infiltration loop and retain district and form, and wherein: coagulating system comprises water-in 1, water outlet 2, dosing mouth 4, agitator 5 and coagulating tank body 3, for mixed reaction solution.Retain district and comprise surge pump 6, under meter 7, infiltration area comprises film water-in 8, film water outlet 10, hollow-fibre membrane external-compression type assembly 9, for separating of pollutent, and back flushing water-in 11, reflux line 12.Whole system needs pressure control system to regulate when running.
Villages and small towns tap water is added in above-mentioned reaction unit:
Villages and small towns tap water enters coagulating tank body 3 from water-in 1, drop into coagulation compound to dosing mouth 4 simultaneously, main component is calcium, magnesium, iron and aluminium, open variable speed stirrer 5, water sample is mixed, according to Optimum flocculation parameter (mixing time 60S, mix and blend speed 250 r/min, flocculation time 15 min, flocculation stirring speed 60 r/min) under reaction, coagulating agent passes through compression double electric layer, electrical counteract, net is caught volume and is swept, the mechanisms such as adsorption bridging make water-borne glue body, suspended particles etc. form flco, change the distribution of sizes of suspended particle in former water, the macromolecular substance such as effective organics removal, and except the mechanism of action of fluorine arsenic is for adsorbing, ion-exchange and complex-precipitation, precipitate 30 min, suspended particle, small organic molecule, heavy metal, high fluorine and arsenic etc. form flco and sink to bottom, regularly open bottom cleaning, open outlet valve and surge pump 6 afterwards, by circulating of surge pump thrust unit, water sample enters hollow-fibre membrane external-compression type assembly 9 by under meter 7, the central nozzle water inlet that water sample distributes from hollow-fibre membrane external-compression type assembly water-in 8 through containing 6 passages, be that advection shape is through film surface cross-flow in hollow-fibre membrane external-compression type assembly 9, FA enters fiber endoporus through tubular fibre membranous wall under pressure difference promotes becomes ultrafiltrated, next treatment unit is entered from water outlet 10 outflow again through afflux, all the other are then condensed to concentrated solution and flow out through the reflux line 12 of the assembly housing the other end containing the central dispense manifold Ji Kou of 6 pore distributions, enter coagulating district.Because fiber is in the natural boundling of rule, when stoste flows between fiber, in height cross-flow state under higher flow velocity, more favourable to the concentration polarization overcoming film surface detention layer, resistant amount (resistant space) is larger, can adapt to broader influent quality or feed conditions, reduce pretreatment technology and cost thereof, MF permeate liquid is without dead angle.And in the apparatus in order to solve the difficulty of blocking and back flushing, the full automatic back-purge system of Aided design, left side valve is closed at film water-in 8 place, clear water is imported and exported 11 from right side back flushing and is flowed from bottom to top, backwashing water flows into coagulating district from top water outlet through reflux line 12, completes and once circulates.
Claims (2)
1. the device of coagulation-microfiltration membrane combined system process villages and small towns tap water, comprise coagulating system, infiltration loop and retain district, it is characterized in that: coagulating system comprises water-in (1), water outlet (2), dosing mouth (4), agitator (5) and coagulating tank body (3), coagulating tank body (3) one upper lateral part is provided with dosing mouth (4), two bottom sides is respectively equipped with water-in (1) and water outlet (2), is provided with agitator (5) in it, retain district and comprise surge pump (6), under meter (7), back flushing water-in (11) and reflux line (12), infiltration loop comprises membrane module water-in (8), membrane module water outlet (10) and hollow-fibre membrane external-compression type assembly (9), hollow-fibre membrane external-compression type assembly (9) bottom is provided with membrane module water-in (8), side is provided with membrane module water outlet (10), described membrane module water-in (8) is successively by under meter (7), surge pump (6) connects the water outlet (2) of coagulating system, the water-in (1) of coagulating system connects hollow-fibre membrane external-compression type assembly (9) top by reflux line (12), water inlet, hollow-fibre membrane external-compression type assembly (9) bottom connects back flushing water-in (11).
2. the device of coagulation according to claim 1-microfiltration membrane combined system process villages and small towns tap water, is characterized in that described agitator (5) is variable speed stirrer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420579698.2U CN204162533U (en) | 2014-10-09 | 2014-10-09 | The device of coagulation-microfiltration membrane integral system process villages and small towns tap water |
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| CN201420579698.2U CN204162533U (en) | 2014-10-09 | 2014-10-09 | The device of coagulation-microfiltration membrane integral system process villages and small towns tap water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673252A (en) * | 2016-12-02 | 2017-05-17 | 常州大学 | Method for producing drinking water by coagulation and ultrafilatration membrane combined process |
| CN113754028A (en) * | 2021-09-23 | 2021-12-07 | 中国环境科学研究院 | High-arsenic water body purification method based on particle size characteristics of arsenic-iron-organic matter |
-
2014
- 2014-10-09 CN CN201420579698.2U patent/CN204162533U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673252A (en) * | 2016-12-02 | 2017-05-17 | 常州大学 | Method for producing drinking water by coagulation and ultrafilatration membrane combined process |
| CN113754028A (en) * | 2021-09-23 | 2021-12-07 | 中国环境科学研究院 | High-arsenic water body purification method based on particle size characteristics of arsenic-iron-organic matter |
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