CN1255683C - Automatic on line detecting device of hollow fiber separating membrane - Google Patents
Automatic on line detecting device of hollow fiber separating membrane Download PDFInfo
- Publication number
- CN1255683C CN1255683C CN 03130384 CN03130384A CN1255683C CN 1255683 C CN1255683 C CN 1255683C CN 03130384 CN03130384 CN 03130384 CN 03130384 A CN03130384 A CN 03130384A CN 1255683 C CN1255683 C CN 1255683C
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- CN
- China
- Prior art keywords
- separating membrane
- pressure
- separating film
- hollow fiber
- automatic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to an automatic on-line detection device for a separating membrane of hollow fibers in fields of sewage treatment and sewage recycling. A pressure sensor for detection is fixed above a separating membrane assembly, and is connected with a PLC control system through a line; an air inlet and an air inlet valve are arranged near a water outlet in the upper surface of the separating membrane assembly. After air with certain pressure is pumped in a separating membrane until water in the separating membrane is completely discharged, the sensor is used for transmitting a signal to the PLC control system, and two pressure values detected at different time are subtracted to obtain a pressure difference so as to detect the integrity of the separating membrane in time. When the pressure difference is smaller than 1 to 5 KPa, the minor parts of the separating membrane are damaged within the allowed band. When the pressure difference is larger than 5 KPa, the separating membrane assembly is changed immediately. The present invention has the advantages of timely and accurate detection, strong reliability, low labor strength, high efficiency and low cost.
Description
Technical field:
The invention belongs to a kind of pick-up unit that is used for the filtration of each field wastewater treatment and reuse, particularly relate to a kind of automatic on-line pick-up unit of hollow fiber separating film.
Background technology:
Along with shortage of water resources increasingly sharpens, wastewater treatment and reuse technology are just obtaining development energetically, hollow fiber separating film is by the water treatment field widespread use, comprise several thousand to several ten thousand films in the common separating film module, the quality of every film will directly influence the filter effect and the filter quality of separating film module, and use at present is that water quality testing meter is installed on separating film module, or on separating film module, leave sample tap, carry out manual detection with instrument or sampling, when the against regulation requirement of water quality is water quality inferiority, illustrating that diffusion barrier has breaks, by manual control, can not guarantee regularly, during because of detection so extremely inaccurate, also be subjected to simultaneously the restriction of accuracy of instrument quality, poor reliability, the cost height, sample examination labour intensity is big, have a strong impact on and handle the back water quality, diffusion barrier is short serviceable life.
Summary of the invention:
Fundamental purpose of the present invention is: overcome above-mentioned deficiency and provide a kind of have efficient, detect automatically, measure accurately, the automatic on-line pick-up unit of good reliability, water quality is good, cost is low hollow fiber separating film.
The technical scheme that the present invention takes for the technical matters that exists in the solution known technology is: this device is made up of hollow fiber separating film assembly and measuring instrument, it is characterized in that: the measuring instrument separated into two parts is pressure transducer and PLC programmable controller, the two links to each other with lead, pressure transducer is fixed on the separating film module top and communicates with the water side of diffusion barrier, also is provided with air intake opening and gas admittance valve on the water delivering orifice next door.
Advantage and good effect that the present invention has are: the signal that sends by pressure transducer passes on the programmable controller PLC of whole process, the integrality of realize regularly, automatic on-line in time being monitored diffusion barrier has improved filter quality, efficient height, good reliability, measurement data is accurate, labour intensity is low, cost is low.
Description of drawings:
Fig. 1 is the assembling synoptic diagram of apparatus of the present invention.
Embodiment:
Summary of the invention of the present invention, characteristics and effect exemplify following examples now and conjunction with figs. is described in detail as follows in order further understanding, and see also Fig. 1.
As shown in Figure 1: be installed into air valve 5 on it having air intake opening 4 above the hollow fiber separating film package shell 10, communicate at separating film module shell 10 upper end fixation pressure sensors 9 and with water side 11.During work, sewage enters the separating film module I through valve 8 from the water inlet 1 of separating film module I, when adopting external-compression type, sewage enters from the aperture on each diffusion barrier 12, clear water after the filtration is from separating film module I water delivering orifice 2,3 through valve 6,7 flow out, every through carrying out one-time detection in 168 hours, at this moment, at first close water intaking valve 8, and outlet valve 6 is half-open, outlet valve 7 and recycle water valve 13 full cut-offs, blowoff valve 14 full cut-offs, then, in separating film module I, inject the air that has certain pressure by the air intake opening 4 of separating film module I and the valve of opening 5, and the water in the hollow fiber separating film 12 is all squeezed out, after the emptying, close all valves, comprise gas admittance valve 5,, write down a force value through 1 minute stabilization time, again through 2 minutes, write down a force value again, two force value are subtracted each other and are drawn a pressure difference value, and the size of this pressure difference value can be represented the integrality of diffusion barrier.Usually, pressure reduction represents to have among the separating film module I integrality of several films 12 relatively poor during less than 1kpa-5kpa, but it is in allowed band, the separating film module I that need more renew during greater than 5kpa when pressure reduction.Usually, the bleed pressure size is by the material decision of diffusion barrier, because of the elasticity of unlike material diffusion barrier different with intensity, so the pressure size is also different, the principle of its selection pressure size is to squeeze liquid in the diffusion barrier 12 rapidly, can not destroy the diffusion barrier film body again, promptly keep diffusion barrier 12 inside and outside pressure relative equilibriums to get final product substantially.The programmable controller PLC that controls whole process links to each other with pressure transducer 9 with lead, and the diffusion barrier material that adopts in the present embodiment is polypropylene (pp), and general pressure is about 100kpa.Detection all valves that finish return to virgin state again.
Claims (1)
1, a kind of automatic on-line pick-up unit of hollow fiber separating film, it is made up of hollow fiber separating film assembly and measuring instrument, it is characterized in that: the measuring instrument separated into two parts is pressure transducer and PLC programmable controller, the two links to each other with lead, pressure transducer is fixed on the separating film module top and communicates with the water side of diffusion barrier, also is provided with air intake opening and gas admittance valve on the water delivering orifice next door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03130384 CN1255683C (en) | 2003-07-09 | 2003-07-09 | Automatic on line detecting device of hollow fiber separating membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03130384 CN1255683C (en) | 2003-07-09 | 2003-07-09 | Automatic on line detecting device of hollow fiber separating membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1479101A CN1479101A (en) | 2004-03-03 |
| CN1255683C true CN1255683C (en) | 2006-05-10 |
Family
ID=34153716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03130384 Expired - Fee Related CN1255683C (en) | 2003-07-09 | 2003-07-09 | Automatic on line detecting device of hollow fiber separating membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1255683C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325148C (en) * | 2005-07-04 | 2007-07-11 | 天津工业大学 | Detecting assemble for film products |
| EP2418012A1 (en) * | 2010-08-11 | 2012-02-15 | Gambro Lundia AB | Device and process for testing filters |
| CN101944275B (en) * | 2010-08-26 | 2012-07-04 | 天津市环境保护科学研究院 | Membrane pollution diagnosis and early warning decision making system of hollow fiber device |
| CN102179181B (en) * | 2011-03-23 | 2013-07-24 | 浙江工业大学 | Experimental test and water production device for ultrafiltration membrane |
| CN103240000B (en) * | 2013-05-27 | 2015-11-25 | 深圳市诚德来实业有限公司 | A kind of detection of inner pressed ultrafiltration membrane filter element and flusher |
-
2003
- 2003-07-09 CN CN 03130384 patent/CN1255683C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1479101A (en) | 2004-03-03 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |