CN86101075A - The vacuum cleaning method of film and equipment thereof - Google Patents
The vacuum cleaning method of film and equipment thereof Download PDFInfo
- Publication number
- CN86101075A CN86101075A CN86101075.2A CN86101075A CN86101075A CN 86101075 A CN86101075 A CN 86101075A CN 86101075 A CN86101075 A CN 86101075A CN 86101075 A CN86101075 A CN 86101075A
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- film
- valve
- cleaning
- equipment
- sewage
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A kind of vacuum cleaning method and equipment thereof that belongs to the film of sewage and waste water processing technology field reduces pressure on the working face (front) of film and oppositely cleans, to remove the adherent pollutent of face.The compacting of film is restored.The effect of this method more than always use just clean, instead clean and positive and negative superior in conjunction with three kinds of methods of cleaning.The present invention utilizes this method to manufacture and design specific equipment.
Description
The invention belongs to water, waste water, sewage or body refuse processing technology field.
(here " film " means the intermediate medium that makes two kinds of separating substances to the present invention relates to a kind of film, as filtering membrane, millipore filtration, ultra-filtration membrane, reverse osmosis membrane etc.) purging method and cleaning equipment, the removal of and the material that be difficult to clean seriously polluted such as particularly suitable oils to film.
The purging method of existing film flows to classification from washing medium, can be divided three classes, and the one, just cleaning promptly pressurizes makes washing medium flow through from the working face (with the face that pending liquid contacts, another side is called reverse side) that is parallel to film, carries out low pressure, the high flow rate flushing; The 2nd, anti-cleaning is promptly pressed to film to washing medium in the other direction from seeing through liquid phase; The 3rd, just cleaning and anti-combining of cleaning, promptly the reverse side from film is pressed into washing medium to be higher than positive pressure when just cleaning.Above-mentioned three kinds of methods can not be proved effective simultaneously to the recovery of mould reality and the removal of pollutent, and especially to the strong pollutent of adhesivity and the film of compacting sensitivity, effect is poorer.
The present invention adopts the novel method reduce pressure and for using the custom-designed specific equipment of this method to clean pollutent on the film on the working face of film, the removal of the recovery of mould reality and pollutent is reached than the obvious superior effect of above-mentioned three kinds of methods.Through preliminary investigation, there are not similar approach and design in the prior art.
The decay that sees through liquid measure of general film is that the factor by two aspects causes.The compacting of first film, it two is pollutions of trapped substance.Obvious to only a kind of factors contribute of some films.The pollution of film comprises the pollution of face and the obstruction of fenestra.The recovery of mould reality and the removal of film surface pollution thing and fenestra tamper are depended in the recovery of the permeable amount of film.When just cleaning film be subjected to the work of force direction and film the time be subjected to force direction with, be unfavorable for the recovery of mould reality and the removal of pollutent, reduces pressure and help pollutant removal, but the limit that pressure reduces is zero that flow velocity can not unrestrictedly increase with the increase flow velocity, need the washing medium amount big simultaneously, this just defines the validity of this purging method, because washing medium passes film, the water yield is little during anti-the cleaning, pollutant removal for strong adhesion is bad, and the pollutent under cleaning also is difficult for taking away.Poorer for the removal effect of atresia position pollutent on the working face of film in addition.The combination of positive and negative cleaning, though for the moment effective to some films, when film was responsive to compacting, because of the pros and cons pressurized of film, the result made film press more real and more real, the water yield progressively descends irrecoverable, and is not thorough to atresia position pollutant removal on the sake simultaneously.The present invention's washing out method that reduces pressure can overcome the shortcoming of above-mentioned several method.Now be that example (other films too) illustrates its essence with the hollow fiber ultrafiltration membrane.Fig. 1 illustrates that tubular fibre flows into fiber stressing conditions behind the sewage and waste water in the silk.(1) is the hollow fiber walls longitudinal profile, sewage and waste water is under the pressure of pump, direction along (3) flows through in silk, see through the direction outflow of liquid along (4), the silk inwall is subjected to the pressure perpendicular to wall, (direction is shown in (2)), this power make a wall attenuation, simultaneously trapped substance are pressed to sidewall and film areole.It is that filter outlet is connected on the inlet of scavenging pump that decompression is cleaned, the suction force of pump washing medium in the inner inflow pump of hollow fibre filament.Fig. 2 is that principle schematic is cleaned in decompression.(6) be washing medium flowing direction in the hollow fibre filament, it is just in time opposite with the flow direction of sewage, waste water, accumulates the granular substance in the silk import when turning round to take away.The silk inwall is subjected to perpendicular to inwall and leaves the power of inwall, also is parallel to the shearing force of inwall, and these two power help the recovery of mould reality and the removal of face and stifled film areole pollutent.If the silk outer wall has washing medium, then can suck in the silk from the silk areole, play the effect of cleaning the silk areole.Following table is that the cleaning performance of several purging methods compares.
| Purging method | Cleaning medium | Multiple extensive value (%) |
| Forward cleans | Clear water | |
| Earlier use clear water again with washing composition | 71 | |
| Oppositely clean | Clear water | 60～70 |
| Earlier use clear water again with washing composition | 83 | |
| Decompression is cleaned | Clear water | 93 |
| Earlier use clear water again with washing composition | ＞99 |
Last table is that the hollow fiber membrane ultrafiltration device processing contains petroleum wastewater cleaning data.Positive and negative cleaning bonded method obviously descends one by one through cleaning permeable amount several times, can't repeat, and film is described, and compacting can not be extensive again one by one.Decompression is cleaned does not then have this shortcoming, can see that from experiment gained data vacuum cleaning method has obvious superiority.
Specific equipment detergent line with the present invention's design connects flow process as shown in Figure 3: blow-off valve (16) cuts out when running well, valve (4), (11), (14) are closed, valve (1), (3), (13) open, at this moment sewage and waste water enters pump (2) from sewage and waste water jar (15) through valve (1), enters hollow-fiber module (18) through pump discharge and valve (3), in silk, pass, flow into sewage and waste water jar (15) through valve (13).Seeing through liquid has two roads to walk, and in the time will filling washwater tank (8), opens valve (10), and shut-off valve (9) when water pot to be cleaned has been expired, leaves valve (9), closes valve (10) and then can discharge or do its usefulness through liquid.The funnel (17) of the washing composition for preparing on washing composition jar (12) filled the washing composition jar.When cleaning, close valve (13), (11) with washing composition, (10), valve (14) is driven in (3), (9), (4), (5) open scavenging pump (6), then washing composition through valve (14), enters assembly (18) from washing composition jar (12), in macaroni yarn, flow through, enter scavenging pump (6), flow back to washing composition jar (12) through valve (5) through valve (4), dirty as can not to use again as washing composition, then can discharge the washing composition jar through valve (7).If outside silk, also advance washing composition, then drive valve (10), (11) close valve (19), and other valve is constant, as wants to blow from the silk external admission film areole of obstruction.Then close valve (11), (10) drive valve (9).To then open valve (19), (11), (4) with the clear water washing, (7), close valve (10), (9), (13), (14), (3), (5), open scavenging pump (6), through valve (19), (11) enter in the macaroni yarn rinse water from clear water jar (8), enter scavenging pump through valve (4), discharge through valve (7) again.If want also water inlet outside silk, then drive valve (10) again, if will be from the silk external admission, then open valve (9) closes valve (10).This device can clean with washing composition separately, also can clean with clear water separately, can also clean with washing composition earlier, cleans with clear water again.
The characteristics of present device are the water inlets that the lowest part of washing composition jar and clear water jar is higher than scavenging pump, and the cleaning of evaporator liquid level will be higher than the inhalent siphon of strainer before cleaning, and makes water can flow full strainer automatically, is full of scavenging pump.The tab sequencial of equipment can be that strainer keeps flat, and purge tank stands up, and jar can make square box into, and (20) are emptying valves, and (21) are the distribution pipeline valves, can regulate the flow and the pressure of the water that enters assembly with valve (21) and valve (3).(22) be spiral heater, can steam heating, (25) are contact thermometers, (23) are that overflow passage (24) is the liquidometer pipe.
According to equipment drawing provided by the invention, adopt following principal dimension can arrive the experimental result that the top is mentioned.
Claims (2)
1, a kind ofly utilize decompression to the method that film cleans, it is characterized in that working face (front) at film goes up decompression and clean, the flow direction of washing medium is opposite with the flow direction of sewage and waste water.
2, a kind of specific equipment that is used for the described method of claim 1 is characterized in that strainer (B) terminates on the inlet of scavenging pump (6), is tapped at again in the outlet of sewage and waste water (2) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86101075 CN1007621B (en) | 1986-01-31 | 1986-01-31 | Method and equipment for membrane cleaning under reduced pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86101075 CN1007621B (en) | 1986-01-31 | 1986-01-31 | Method and equipment for membrane cleaning under reduced pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86101075A true CN86101075A (en) | 1987-08-26 |
| CN1007621B CN1007621B (en) | 1990-04-18 |
Family
ID=4801287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86101075 Expired CN1007621B (en) | 1986-01-31 | 1986-01-31 | Method and equipment for membrane cleaning under reduced pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1007621B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063674C (en) * | 1996-08-16 | 2001-03-28 | 中国科学院生态环境研究中心 | Method and apparatus for using operating pump to negative pressure cleaning by semipermeable membrance |
| CN103894072A (en) * | 2012-12-27 | 2014-07-02 | 第一毛织株式会社 | Separation membrane cleaning system and separation membrane cleaning method using the same |
| CN113856475A (en) * | 2021-10-22 | 2021-12-31 | 滁州久盈膜科技有限公司 | Rinsing method and device for hollow fiber membrane |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1331574C (en) * | 2002-08-29 | 2007-08-15 | 奥加诺株式会社 | Method for operating separation membrane module and separation membrane apparatus |
| CN100430116C (en) * | 2005-03-24 | 2008-11-05 | 日本碍子株式会社 | Method for cleaning separation membrane |
-
1986
- 1986-01-31 CN CN 86101075 patent/CN1007621B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063674C (en) * | 1996-08-16 | 2001-03-28 | 中国科学院生态环境研究中心 | Method and apparatus for using operating pump to negative pressure cleaning by semipermeable membrance |
| CN103894072A (en) * | 2012-12-27 | 2014-07-02 | 第一毛织株式会社 | Separation membrane cleaning system and separation membrane cleaning method using the same |
| CN103894072B (en) * | 2012-12-27 | 2018-02-27 | 乐天尖端材料株式会社 | Seperation film purging system and the seperation film cleaning method using the system |
| CN113856475A (en) * | 2021-10-22 | 2021-12-31 | 滁州久盈膜科技有限公司 | Rinsing method and device for hollow fiber membrane |
| CN113856475B (en) * | 2021-10-22 | 2024-02-09 | 滁州久盈膜科技有限公司 | Rinsing method and device for hollow fiber membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1007621B (en) | 1990-04-18 |
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| PB01 | Publication | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |