CN202139089U - Membrane air floatation separating device - Google Patents
Membrane air floatation separating device Download PDFInfo
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- CN202139089U CN202139089U CN201120273411U CN201120273411U CN202139089U CN 202139089 U CN202139089 U CN 202139089U CN 201120273411 U CN201120273411 U CN 201120273411U CN 201120273411 U CN201120273411 U CN 201120273411U CN 202139089 U CN202139089 U CN 202139089U
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Abstract
A membrane air floatation separating device belongs to the technical field of water treatment and comprises a vertically-installed membrane module. The lower portion of the membrane module is connected with a feeding pipe, the upper portion of the membrane module is connected with a concentrated solution discharging pipe, and a penetrating fluid outlet is further arranged on the membrane module. The membrane air floatation separating device is characterized in that a gas-liquid mixture power device is arranged on the feeding pipe. The device adopts a double-circulation running mode, namely, membrane side purification circulation and recycling purification circulation and a working mode of cross flow is adopted, thereby guaranteeing long-time stable running of the membrane module and enabling partial pollutants to be timely discharged out of a circulation system. The membrane air floatation separating device has the technical advantages of being simple in operation, small in occupied area, good in water quality of effluent, long in service life of the membrane, low in running cost and the like, and is suitable for all difficultly-treated feed liquid such as waste water with high salinity, high turbidity and high suspended matter and containing oil and the like.
Description
Technical field
The utility model belongs to water-treatment technology field, is specifically related to a kind of film gas floatation separation device.
Background technology
At present, the processing of high salinity waste water can be described as the great difficult problem that whole water treatment field faces.Adopt step bonded methods such as neutralization, membrane distillation, evaporation concentration, crystallization can handle a part of high salinity waste water, but then handled not at all for the present technology of some high salinity waste water.And for high turbidity, high suspended matter waste water; Usually adopt gravity settling, neutralization, coagulant precipitation and filtration to handle; But a large amount of molecules are difficult to remove through sedimentation, and these methods take up room greatly, investment cost is high, and its burden that brings makes a lot of enterprises be difficult to bear.
In addition, oily(waste)water also ubiquity in present industrial production, and intractability is very big.Generally speaking, oily(waste)water can recycle, regularly discharge.But along with the raising of product production, the quantity discharged of oily(waste)water is considerably beyond the amount of recycling; On the other hand, under the diversified requirement of range of product, very big uncertainty has appearred in the composition of oily(waste)water, recycles unrealistic.Therefore for oily(waste)water, press for a kind of solution of essence.
Present stage, the treatment process of oily(waste)water can simply be divided into chemical method and physics method, and wherein chemical method mainly comprises: acidization, salting-out process, acidifying coacervation, coacervation, demulsifier method etc.; The physics method mainly comprises: treatment with electrolytic method, air supporting method, High-gradient Magnetic suspension method, ultrafiltration process etc. also have physico-chemical processes such as chemical demulsification+electrolytic gas float glass process etc.All there is such or such drawback in these methods, and it is not very good to be used for handling oily(waste)water, and for example: the shortcoming of chemical demulsification+air supporting method is that complex equipments, management difficulty are big, running cost is high; The shortcoming of ultrafiltration process is to remove solvability COD, and the easy film surface of stopping up of the impurity in the waste water, causes ultrafiltration to go on; The shortcoming of electric floating method is that Technology property is strong, complex process, and chemical process produces a large amount of waste residues, has increased the processing cost of body refuse, also causes secondary pollution easily.
This shows that existing a lot of methods can not satisfy the growing market requirement fully, press for a kind of new technology and solve above these and can not handle or problem hard to manage, that processing cost is high.
Summary of the invention
The purpose of the utility model has been to provide a kind of treatment effect good and stable strong film gas floatation separation device.
Based on above-mentioned purpose; The utility model has been taked following technical scheme: a kind of film gas floatation separation device; The membrane module that comprises vertical installation; The membrane module bottom is connected with feed-pipe, top is connected with the liquid concentrator vent pipe, also is provided with the penetrating fluid outlet simultaneously on the membrane module, and said feed-pipe is provided with the gas-liquid mixed PWR PLT.
Said device also comprises air supporting circulation groove and circulation tube; Air supporting circulation groove top is provided with overflow weir, and the other end of liquid concentrator vent pipe inserts in the air supporting circulation groove; Circulation tube picks out and imports feed-pipe from air supporting circulation groove bottom.
Said device also comprises the multistage groove, and multistage groove water outlet and feed-pipe join; The overflow weir water outlet imports multistage groove leading portion through pipeline.
Said device also comprises solid-liquid separator, and the opening for feed of solid-liquid separator is communicated with the multistage trench bottom through pipeline, and the pipeline that links to each other with the discharge port of solid-liquid separator imports multistage groove leading portion.
Said gas-liquid mixed PWR PLT are gas-liquid mixing pump.
Said gas-liquid mixed PWR PLT are made up of the pump and the compressed air inlet that are arranged on the feed-pipe.
The film gas floatation separation device of the utility model adopts two circular flow patterns; It is the circulation of film side decontamination cycle and reclaiming clean; Mode of operation adopts the cross-flow mode, can not only guarantee membrane module operation steady in a long-term, can make the part pollutent in time discharge outside the circulating system again; Have technical superioritys such as simple to operate, that floor space is little, effluent quality good, membrane lifetime is long, running cost is low, feed liquids hard to manage such as high salinity, high turbidity, high suspended matter and oily(waste)water all are suitable for.The concrete principle of work of this covering device is: the gas-liquid mixed feed liquid infeeds membrane module from the membrane module bottom; In the process of membrane sepn, along with appearing of clear water, the concentration of material rises rapidly; Since concentration polarization with new produce separate out suspended substance and xln, cause the pollution of film easily.But under the condition that air supporting exists; Micro-bubble and oil droplet, xln and other suspended substance of high dispersing in feed liquid adheres to each other; Under pressure and self buoyancy function, move upward along water (flow) direction, thereby these suspended substances are taken out of outside the membrane module, the stirring action of air filled cavity reduces effectively or has eliminated the pollution problem that concentration polarization brings simultaneously; Prevent suspended substance in the film surface attachment, thereby make film steady running for a long time.Thereafter, the scavenging solution of in feed liquid, separating is discharged membrane module through penetrating fluid outlet (being located at usually on the sidewall of membrane module); Having carried the liquid concentrator of a large amount of microbubbles then discharges from membrane module top and flows to the air supporting circulation groove through the liquid concentrator vent pipe.Because pressure is bigger in membrane module, the air in the feed liquid can exist with stable bubble; Bubble is discharged pressure drop behind the membrane module with liquid concentrator, import the air supporting circulation groove after, the bubble that is released out floats rapidly, to liquid level, utilizes simple overflow just can easily remove oil slick, scum silica frost the suspended substance holder that sticks to bubble surface.According to the different properties of oil slick, scum silica frost, can select air supporting circulation groove spillage entered in the multistage grooves such as advection groove or oil removal groove and make advanced treatment.On the other hand, be trapped in the air supporting circulation groove liquid concentrator and through the air supporting circulation groove spillage after the advanced treatment with infeed membrane module again after original pending liquid mixes, the like this circulation helps to realize efficient, thorough isolating purpose.
For high salinity waste water, why existing single reverse-osmosis treated scheme is not handled, mainly is because salinity is very easily separated out at the reverse osmosis membrane surface crystallization, makes film forming obstruction.If but utilize method of the present invention and corollary apparatus (membrane module is selected reverse osmosis membrane for use); Under pneumatically supported assistance; Salinity has just begun crystallization and has gone out fine particle and just taken out of outside the film system by bubble; Stopped because of crystal sticks to the stifled film phenomenon that the film surface produces, thereby guaranteed the steady running of film and entire treatment system effectively.Because membrane process itself is exactly the sepn process of a crystallization (high-salt wastewater), breakdown of emulsion (oily(waste)water), therefore method of the present invention need not add any medicament in use, has avoided the inefficacy and the secondary pollution of chemical agent.
In addition, the membrane module type in this device can be chosen as required flexibly, no matter is that micro-filtration, ultrafiltration, nanofiltration or reverse osmosis membrane all can use.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structural representation of embodiment 2.
Embodiment
A kind of film gas floatation separation device, as shown in Figure 1, comprise membrane module 6, air supporting circulation groove 3, circulation tube 9, multistage groove 10 and the solid-liquid separator 11 (plate filter) of vertical installation; Membrane module 6 bottoms are connected with feed-pipe 8, and the other end of feed-pipe 8 and multistage groove water outlet 14 join, and simultaneously, the circulation tube 9 that picks out from air supporting circulation groove 3 bottoms also imports feed-pipe 8, and feed-pipe 8 is provided with gas-liquid mixing pump 7; Membrane module 6 tops are connected with liquid concentrator vent pipe 4, and the other end of liquid concentrator vent pipe 4 inserts in the air supporting circulation groove 3; In addition, also be provided with penetrating fluid outlet 5 on the membrane module 6.
Air supporting circulation groove 3 tops are provided with overflow weir 2, and overflow weir water outlet 15 imports multistage groove 10 leading portions through pipeline; The opening for feed 13 of solid-liquid separator 11 is communicated with multistage groove 10 bottoms through pipeline, and the pipeline that links to each other with the discharge port 12 of solid-liquid separator 11 imports multistage groove 10 leading portions; Also be provided with water inlet 1 on the multistage groove 10.
If said apparatus is used to handle oil-containing emulsifying water, then membrane module 6 is selected ultra-filtration membrane for use.Under the effect of gas-liquid mixing pump 7, the microbubble high dispersing is in feed liquid; Feed liquid is carried microbubble natural breakdown of emulsion after hyperfiltration membrane assembly 6 is handled, adhering to the smeary microbubble and together getting into air supporting circulation groove 3 with liquid concentrator (gas-liquid mixed liquid concentrator), bubble floating, with the greasy dirt holder to fluid surface, and then overflow to multistage groove 10.In multistage groove 10, the oil of come-up, slag utilize Oil scraper to remove, and the suspended substance of some larger particles then is deposited to multistage groove 10 bottoms gradually, utilize plate filter 11 filterings.Simultaneously, mend original pending liquid from the water inlet 1 (, can select water inlet 1 is located at the leading portion or the stage casing of multistage groove 10) that is arranged on multistage groove 10 back segments if Pollutant levels are higher the pending liquid.10 water outlets of multistage groove be trapped in the liquid water distribution in the air supporting circulation groove 3 after form feed liquid, get into membrane module 6 and make circular treatment, purify back water and then discharge from penetrating fluid outlet 5.
Film obtains self-purification in the dissolved air flotation process, the frequency that system-down overhauled or washed film reduces significantly, and the work-ing life of film and entire treatment efficient all are improved, and greatly reduce the processing cost of waste water.
For high-salt wastewater, membrane module 6 is selected reverse osmosis membrane for use.Why existing single reverse-osmosis treated scheme has handled not high-salt wastewater, mainly is because salinity is very easily separated out at the reverse osmosis membrane surface crystallization, makes film forming obstruction.If but utilize the film gas floatation separation device of the utility model; Under pneumatically supported assistance; Salinity has just begun crystallization and has gone out fine particle and just taken out of outside the film system by bubble; Stopped because of crystal sticks to the stifled film phenomenon that the film surface produces, thereby guaranteed the steady running of film and entire treatment system effectively.
According to actual needs, the film gas floatation separation device of the utility model can also other forms appear, such as Fig. 2.Solid-liquid separator 11' has adopted whizzer in the film gas floatation separation device shown in Figure 2, and multistage groove 10' has specifically used the advection groove, and the selection of gas-liquid mixed PWR PLT is the mode of pump 16+ compressed air inlet 17 combinations.Because advection groove removal throw out preferably, so the film gas floatation separation device of Fig. 2 is more suitable in handling the not high turbidity of butyraceous, high suspended matter waste water.
Claims (6)
1. film gas floatation separation device comprises the membrane module of vertical installation, and the membrane module bottom is connected with feed-pipe, top is connected with the liquid concentrator vent pipe, also is provided with the penetrating fluid outlet simultaneously on the membrane module, it is characterized in that said feed-pipe is provided with the gas-liquid mixed PWR PLT.
2. film gas floatation separation device as claimed in claim 1 is characterized in that this device also comprises air supporting circulation groove and circulation tube; Air supporting circulation groove top is provided with overflow weir, and the other end of liquid concentrator vent pipe inserts in the air supporting circulation groove; Circulation tube picks out and imports feed-pipe from air supporting circulation groove bottom.
3. film gas floatation separation device as claimed in claim 2 is characterized in that said device also comprises the multistage groove, and multistage groove water outlet and feed-pipe join; The overflow weir water outlet imports multistage groove leading portion through pipeline.
4. film gas floatation separation device as claimed in claim 3 is characterized in that said device also comprises solid-liquid separator, and the opening for feed of solid-liquid separator is communicated with the multistage trench bottom through pipeline, and the pipeline that links to each other with the discharge port of solid-liquid separator imports multistage groove leading portion.
5. like the arbitrary described film gas floatation separation device of claim 1-4, it is characterized in that said gas-liquid mixed PWR PLT are gas-liquid mixing pump.
6. like the arbitrary described film gas floatation separation device of claim 1-4, it is characterized in that said gas-liquid mixed PWR PLT are made up of the pump and the compressed air inlet that are arranged on the feed-pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120273411U CN202139089U (en) | 2011-07-29 | 2011-07-29 | Membrane air floatation separating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120273411U CN202139089U (en) | 2011-07-29 | 2011-07-29 | Membrane air floatation separating device |
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| Publication Number | Publication Date |
|---|---|
| CN202139089U true CN202139089U (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120273411U Expired - Fee Related CN202139089U (en) | 2011-07-29 | 2011-07-29 | Membrane air floatation separating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276079A (en) * | 2011-07-29 | 2011-12-14 | 郑州银科尔科技有限公司 | Membrane air floatation separation method and matched device thereof |
-
2011
- 2011-07-29 CN CN201120273411U patent/CN202139089U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276079A (en) * | 2011-07-29 | 2011-12-14 | 郑州银科尔科技有限公司 | Membrane air floatation separation method and matched device thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20150729 |
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| EXPY | Termination of patent right or utility model |