CN105251367A - Technology and device for efficiently purifying film through dissolved air flotation method - Google Patents
Technology and device for efficiently purifying film through dissolved air flotation method Download PDFInfo
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- CN105251367A CN105251367A CN201510767001.3A CN201510767001A CN105251367A CN 105251367 A CN105251367 A CN 105251367A CN 201510767001 A CN201510767001 A CN 201510767001A CN 105251367 A CN105251367 A CN 105251367A
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Abstract
The invention relates to the field of high-precision film material concentration and separation and water purification, in particular to a technology and device for efficiently purifying a film through a dissolved air flotation method. Cleaning water in a cleaning pool enters a dissolved air device. Dissolved air water produced after the cleaning water passes through the dissolved air device enters a film device through a water production pipeline and penetrates through the film; due to the fact that a pressure relief pipeline lowers the pressure intensity inside the film device, dissolved air water will generate a large number of microbubbles in the low-pressure environment; the smaller the microbubbles are, the larger surface tension is; the more impurities adhering to the surface are, the firmer adhesion is. In the environment with small pressure intensity, the volume of the microbubbles rapidly expands and increases, strong impact force is produced, sewage on the surface of the film is disengaged from the surface of the film, and matter easy to oxidize is oxidized and separated out to form colloid under the effect of oxygen in bubbles to get away from the surface of the film. In a whole, the technology and device have the advantages that spent time is short, equipment running is not affected, the cost is low, the application range is wide, maintenance is easy and convenient, the film device is effectively cleaned, and continuous running period is long.
Description
Technical field
Patent of the present invention belongs to high-precision membrane material concentrating and separating and Water warfare field (comprising micro-filtration, ultrafiltration etc.), is specifically related to a kind of air soluble method high performance membrane cleaning technique and device thereof.
Background technology
At present, in water treatment and material UF membrane field of purification, the problems such as ubiquity fouling membrane speed is fast; Because the material of process mostly is liquid-liquid, solid liquid-solid, liquid-liquid-etc. the multi phase state material of high concentration, cause film in use, frequent contaminated thing blocking film surface, to such an extent as to film throughput decline or film device out of service; Fouling membrane has two kinds of situations: one is adhesion layer, it is by material suspended particle, colloidal dissolved substance, or because growing of microorganism forms cover layer (dirt) on film, another kind is blocking, namely, crystallization concentrated by solute in feed liquid etc. or precipitation cause fenestra to produce blocking in various degree, thus cause the continuous decline of flux; Fouling membrane is that high-precision membrane does the problem often run in the use procedure of material concentrating and separating and Water warfare, and reliable, the stability of film device are declined, and continuous operation period shortens, and constrains the application of film.
The major way that existing film device controlling diaphragm pollutes is square impact and malleation backwash; Under normal circumstances, the not too firmly particle of the adhesion on film surface can only wash away by square impact, can not solve the particulate matter sticking to film surface of long time integration, the limited efficiency of its square impact; Malleation backwash makes backwashing pump that the water after mistake film is driven into high-precision membrane, because the pressure loss is excessive, cleans film without enough energy, membrane flux generally can only be made to return to about 30%; Use film device process waste water along with increasing enterprise and carry out the concentrating and separating of material, the industrial requirement of market to film device is also more and more higher, existing film device is due to the cycle of operation short needs Chemical cleaning frequently, difficult in maintenance, can not meet the instructions for use of enterprise.
To this, I develops a kind of air soluble method high performance membrane cleaning technique and device thereof according to many years of experience, air-dissolving apparatus is applied in the cleaning process of film device, by being pressed into gas in rinse water, film device is entered by way of pipeline, in the environment that pressure diminishes, microbubble overflows, the microbubble that specific area is little easily adheres to dirt, the foreign material on film are impacted in microbubble expansion simultaneously, gas in bubble also can some materials on oxide-film, make it to become colloid and depart from film device, compared with additive method, the present invention can clear up various film device in any environment, have time-consuming short, do not affect the operation of equipment, cost is low, applied range, easy maintenance, effective cleaning film device, continuous operation period is long, effectively can reduce production cost and improve the advantages such as the economic benefit of enterprise.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and a kind of time-consuming short, operation of not affecting equipment is provided, cost is low, applied range, easy maintenance, high-efficiency cleaning film device, continuous operation period long, effectively can reduce air soluble method high performance membrane cleaning technique and device thereof that production cost improves the economic benefit of enterprise.
The present invention is achieved by the following technical solutions: 1, a kind of air soluble method high performance membrane purification techniques, comprises the steps:
(1) open the relief pipeline of film device, pressure release is carried out to film device;
(2) rinse water in clear water reserviors enters air-dissolving apparatus;
(3) rinse water out from step (2), enters in film device by water production pipeline, cleans, rinse water is after air-dissolving apparatus, the dissolved air water produced enters into film device by water production pipeline, through film, due to the pressure release of relief pipeline, film device internal pressure die-offs, dissolved air water produces a large amount of microbubbles, microbubble its surface tension less is larger, the impurity of surface adhesion is more, adhere to more firm, in the environment that pressure is little, the rapid spatial expansion of microbubble increases, even part microbubble explosion, produce powerful impulsive force, film surface contaminants is made to depart from film surface, and in bubble oxygen effect under, the oxidized precipitation of material easily oxidized on film becomes colloid, depart from film surface,
(4) water of the cleaned film in step (3), is discharged by relief pipeline.
2, a kind of air soluble method high performance membrane purifier, it comprises film device, clear water reserviors, and described film device has relief pipeline, described film device be provided with water production pipeline, the other end of described water production pipeline is connected with clear water reserviors, and described water production pipeline is provided with air-dissolving apparatus.
Gas in described air-dissolving apparatus is air or other soluble gas.
Described air-dissolving apparatus is air dissolved pump or dissolving.
Described relief pipeline is provided with switch.
Rinse water in described clear water reserviors is that film device filtrate also can be clear water.
A kind of air soluble method high performance membrane purification techniques of the present invention and device thereof, have following beneficial effect:
(1) the technology of the present invention can be used for continuous operation or the stopped status of film device, can ensure the clean of film surface, improve the cycle of operation of film device, reduce the maintenance cost of film device by interval or lasting cleaning.
(2) the present invention is by air soluble method cleaning technique, utilize microbubble specific area little, surface tension great Yi adheres to the principle of dirt, clear up film device, simultaneously in the environment that pressure is little, microbubble can expand the dirt impacted on film, the material that the subsidiary oxygen of bubble also can be oxidizable on oxide-film, make it depart from film surface, have simple to operate, safeguard convenient, cleaning efficiency is high, continuous operation period is long, effectively can improve the advantage of Business Economic Benefit.
(3) air soluble method high performance membrane Removal Technology of the present invention, does not add chemical substance, does not impact film itself, can be applicable to biology, pottery, the various membranous system such as organic, has applied range, is applicable to the advantage of suitability for industrialized production.
(4) air soluble method high performance membrane purifier of the present invention, the water after film device can be utilized to filter, to clear up film device, can realize recycling of water resource, have the advantage of environmental protection, saving.
(5) air soluble method high performance membrane purifier of the present invention, water production pipeline can be connected with the product mouth of a river of any film device, the Yuan Shui side of film device is provided with relief pipeline (can ad hoc or utilize influent side pipeline), then utilize air soluble method high-efficient film cleaning device to clean film device, there is advantage easy for installation, simple to operate.
Accompanying drawing explanation
Fig. 1 is the process chart of a kind of air soluble method high performance membrane of the present invention purification techniques.
Fig. 2 is the structural representation of a kind of air soluble method high performance membrane of the present invention purifier.
In figure: 1, relief pipeline 2, film device 3, water production pipeline 4, air-dissolving apparatus 5, clear water reserviors.
Detailed description of the invention
Be described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing, should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
1, a kind of principles illustrated of air soluble method high performance membrane purification techniques is as follows:
As shown in Figure 1 and Figure 2, a kind of air soluble method high performance membrane purification techniques, comprises the steps:
(1) open the relief pipeline 1 of film device 2, pressure release is carried out to film device 2, reduce the pressure of film device 2 inside;
(2) rinse water in clear water reserviors 5 enters air-dissolving apparatus 4, makes gas dissolve in water by air-dissolving apparatus 4;
(3) rinse water out from step (2), enters in film device 2 by water production pipeline 3, scrubbing, rinse water is after air-dissolving apparatus 4, the dissolved air water produced enters into film device 2 by water production pipeline 3, through film, due to the pressure release of relief pipeline 1, film device 2 internal pressure die-offs, dissolved air water produces a large amount of microbubbles, microbubble its surface tension less is larger, the impurity of surface adhesion is more, adhere to more firm, in the environment that pressure is little, the rapid spatial expansion of microbubble increases, produce powerful impulsive force, film surface contaminants is made to depart from film surface, and in bubble oxygen effect under, the oxidized precipitation of material easily oxidized on film becomes colloid, depart from film surface,
(4) water of the cleaned film in step (3) is gentle, is discharged by relief pipeline 1.
2, the detailed description of the invention of a kind of air soluble method high performance membrane purifier of the present invention (this device can be independent cleaning plant, also can be used as the assembly that film device 2 runs) is as follows:
As shown in Figure 2, a kind of air soluble method high performance membrane purifier of the present invention, it comprises film device 2, clear water reserviors 5, the upper end of described film device 2 is provided with relief pipeline 1, the lower end of described film device 2 is provided with water production pipeline 3, the other end of described water production pipeline 3 is connected with clear water reserviors 5, and described water production pipeline 3 is provided with air-dissolving apparatus 4; First open the switch of relief pipeline 1, reduce the pressure of film device 2 inside, then open the switch of water production pipeline 3, start air-dissolving apparatus, make the water of clear water reserviors 5 enter in film device 2 through air-dissolving apparatus 4, after the cleaned film of rinse water, discharge through relief pipeline 1.
Claims (5)
1. an air soluble method high performance membrane purification techniques, is characterized in that, comprises the steps:
(1) open the relief pipeline of film device, pressure release is carried out to film device;
(2) rinse water in clear water reserviors enters air-dissolving apparatus;
(3) rinse water out from step (2), enters in film device by water production pipeline, scrubbing, rinse water is after air-dissolving apparatus, the dissolved air water produced enters into film device by water production pipeline, through film, due to the pressure release of relief pipeline, film device internal pressure die-offs, dissolved air water produces a large amount of microbubbles, microbubble its surface tension less is larger, the impurity of surface adhesion is more, adhere to more firm, in the environment that pressure is little, the rapid spatial expansion of microbubble increases, produce powerful impulsive force, film surface contaminants is made to depart from film surface, and in bubble oxygen effect under, the oxidized precipitation of material easily oxidized on film becomes colloid, depart from film surface,
(4) water of the cleaned film in step (3), is discharged by relief pipeline.
2. a kind of air soluble method high performance membrane purification techniques according to claim 1, is characterized in that: the gas in described air-dissolving apparatus is air or other soluble gas.
3. an air soluble method high performance membrane purifier, it comprises film device, clear water reserviors, it is characterized in that: the upper end of described film device is provided with relief pipeline, the lower end of described film device is provided with water production pipeline, the other end of described water production pipeline is connected with clear water reserviors, and described water production pipeline is provided with air-dissolving apparatus.
4. a kind of air soluble method high performance membrane purifier according to claim 3, is characterized in that: described air-dissolving apparatus is air dissolved pump or dissolving.
5. a kind of air soluble method high performance membrane purifier according to claim 3, is characterized in that: described relief pipeline is provided with switch, described water production pipeline is provided with switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510767001.3A CN105251367A (en) | 2015-11-12 | 2015-11-12 | Technology and device for efficiently purifying film through dissolved air flotation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510767001.3A CN105251367A (en) | 2015-11-12 | 2015-11-12 | Technology and device for efficiently purifying film through dissolved air flotation method |
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| CN201510767001.3A Pending CN105251367A (en) | 2015-11-12 | 2015-11-12 | Technology and device for efficiently purifying film through dissolved air flotation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861440A (en) * | 2017-03-22 | 2017-06-20 | 科林普尔环保科技有限公司 | A kind of new reverse osmosis membrane is on-line Full positive and negative to wash cleaning equipment |
| CN110745910A (en) * | 2019-12-10 | 2020-02-04 | 南京钛净流体技术有限公司 | Honeycomb ceramic membrane filtering method and filtering device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580545A (en) * | 2012-03-22 | 2012-07-18 | 华南理工大学 | Combined ultra-filtration device with membrane pollution control and ultrasonic cleaning functions |
-
2015
- 2015-11-12 CN CN201510767001.3A patent/CN105251367A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580545A (en) * | 2012-03-22 | 2012-07-18 | 华南理工大学 | Combined ultra-filtration device with membrane pollution control and ultrasonic cleaning functions |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861440A (en) * | 2017-03-22 | 2017-06-20 | 科林普尔环保科技有限公司 | A kind of new reverse osmosis membrane is on-line Full positive and negative to wash cleaning equipment |
| CN110745910A (en) * | 2019-12-10 | 2020-02-04 | 南京钛净流体技术有限公司 | Honeycomb ceramic membrane filtering method and filtering device |
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