CN101468265A - Microporous film filter for acid liquor filtering - Google Patents
Microporous film filter for acid liquor filtering Download PDFInfo
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- CN101468265A CN101468265A CNA2007101738732A CN200710173873A CN101468265A CN 101468265 A CN101468265 A CN 101468265A CN A2007101738732 A CNA2007101738732 A CN A2007101738732A CN 200710173873 A CN200710173873 A CN 200710173873A CN 101468265 A CN101468265 A CN 101468265A
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Abstract
The invention relates to a millipore membrane filter applied to acid liquid filtration, which belongs to the technical field of wastewater treatment. The filter comprises a tank body, a stainless steel tube sheet, a bulky polyfluortetraethylene membrane filter bag, filter bag support cage frameworks, an acid feeding flexible valve, a reflux flexible valve, a backsurge flexible valve, a mud discharge flexible, a cleaning agent liquid feeding valve, an air electromagnetic valve and an exhaust electromagnetic valve, wherein the bulky polyfluortetraethylene membrane bag is sleeved on the filter bag support cage framework, and all filter bag support cage frameworks are fixed on the stainless steel tube sheet through screws. The stainless steel tube sheet divides the tank body into two parts, wherein the upper part is a clean water area, and the lower part is a waste liquid area (a filter area). The filter has a simple structure, and takes a membrane made of a bulky polyfluortetraethylene material as a filter material, so as to achieve the real surface filter effect, and completely retain impurities in an acid liquid on the surface of the membrane. Because the selected membrane has excellent acid resistance, hydrophobias and smaller friction coefficient, the block phenomenon of the filter material can not occur.
Description
Technical field
The present invention relates to a kind of equipment of technical field of waste water processing, specifically is a kind of microporous film filter that is applied in the acid liquor filtering.
Background technology
In the acid cleaning process of steel plant's pickling lines, in the various descaling baths except that the acid solution that contains high concentration, also supervene a large amount of iron scales, ferrous sulfate crystalline solid (sulfur acid descaling bath), ferrous nitrate crystalline solid various solid impurities such as (containing the nitric acid acidwashing groove), these impurities accumulations are in descaling bath, occupy the useful space, consumed the mass efficient acid solution, simultaneously, also increase the difficulty of acid tank maintenance cleaning, and shortened the time of the normal maintenance of acid tank.
In the prior art, the filter that pickling line uses is common orifice plate filtration etc., and filter capacity is relatively poor, and does not possess the self-cleaning function, is in not user mode at present basically.Therefore, seeking a kind of good acid liquor filtering device, solve thoroughly that impurity too much reaches the too much problem of crystalline solid in the acid solution, is each steel plant rather eager hopes at present.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of microporous film filter that is applied in the acid liquor filtering is provided.This filtration device structure is simple, and making film with the expanded PTFE material is that filtrate reaches real surface filtration effect, make impurity in the acid solution all be trapped in the surface of film, because the film selected for use has splendid acid-resisting, not being stained with property and very little coefficient of friction, guarantees that filter material can not produce phenomenon of blocking.Under the situation that does not increase operating load, both guaranteed the flux peak of liquid like this, simultaneously also effective collection the solid particle in the liquid.
The present invention is achieved by the following technical solutions, the present invention includes: tank body, stainless steel card, eptfe film filter bag, filter bag support cages bone, advance sour flexible valve, backflow flexible valve, backwash flexible valve, spoil disposal flexible valve, cleaning agent feed liquor valve, air magnetic valve, exhaust solenoid valve.The eptfe film filter bag is enclosed within on the filter bag support cages bone, by screw all filter bag support cages bones is fixed on the stainless steel card then.The stainless steel card is divided into two tank body, and top is clear water zone, and the bottom is waste liquid (promptly filtering) district.The top, waste liquid district of tank body is provided with the acid discharge pipeline, and the acid discharge pipeline can be connected in descaling bath.The tank body periphery is provided with into sour flexible valve, backflow flexible valve, backwash flexible valve, spoil disposal flexible valve, cleaning agent feed liquor valve, air magnetic valve, exhaust solenoid valve valve.
Described eptfe film filter bag, the advantage of selecting for use the expanded PTFE material to make is: low-friction coefficient, chemical stability and ganoid characteristics make filter pressure only need 0.07-0.1MPa, and poly-tetrafluoro is made the surface of film filter material and is cleared up very easily, several seconds can be finished cleaning, make filtration reach continuous operation substantially,, make the film filter material be much higher than the conventional fibre filter material service life like this because of expanded PTFE is again the very high material of a kind of intensity.Poly-tetrafluoro is made the film filter material and is had splendid chemical stability, extremely low coefficient of friction, and the temperature that ability is higher, porous, extreme obdurability are difficult for wearing out, and heavily fortified point is durable for a long time.
Described filter bag support cages bone is selected modified polypropylene material for use, can anti-strong acid corrosion.
The present invention can be applicable to the impurity in the various pickling lines descaling baths in filtrate steel ironworks.
The present invention can also be integrated into automatic control system, adopts PLC set HMI to control automatically, but human-computer dialogue, by technological requirement to each parameter show in real time, modification, record, and can carry out communication with various host computers such as DCS, realize collecting and distributing control.The design and installation separately of this control system also can be concentrated design and installation with other process control system.
Compared with prior art, the present invention has following beneficial effect:
1. filter pressure is low
Filter pressure only needs 0.07～0.1MPa, and the filter pressure of other existing liquid filter generally is about 0.3MPa.
2. can clean filter material, continuous filtration automatically
When filtering pressure and reach setting value, filter carries out filter material automatically and cleans, whole process only the several seconds can finish, clean finish after, filter enters the filtration state again automatically, whole process can be controlled automatically, be circulated and carry out by PLC.
3. be difficult for stopping up
Owing to be surface filtration, gather the characteristic of film itself, can both thoroughly wash the filter cake of film filter material outer surface when cleaning at every turn, clean the back circulation and return to normal condition again.
4. do not pollute the product that is collected
Membrane filter without any need for chemical means finish filtration work, its fabulous chemical stability is arranged in addition, make filtrate remain its person's character, reach the effect of pollution-free collection product.
5. long service life, use cost is low
Because expanded PTFE is made the film filter material and is had particular performances: the wide operating temperature d. of a. chemistry inertness b. low-friction coefficient c. extremely strong toughness g. surface filtration of e. hydrophily f. that can not wear out.These characteristics make the soda acid that it can anti-almost any character, and the life-span is strengthened greatly, and maintenance cost significantly reduces, because low press filtration, energy consumption is few again, and use cost also greatly reduces.
6. use ancillary methods such as compressed air, can carry out mud and concentrate or mummification.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided the detailed embodiment and the course of work being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, the present embodiment microporous film filter mainly comprises: tank body 1, stainless steel card 2, eptfe film filter bag 3, filter bag support cages bone 4, advance sour flexible valve 5, backflow flexible valve 6, backwash flexible valve 7, spoil disposal flexible valve 8, cleaning agent feed liquor valve 9, air magnetic valve 10, exhaust solenoid valve 11.Eptfe film filter bag 3 is enclosed within on the filter bag support cages bone 4, by screw all filter bag support cages bones 4 is fixed on the stainless steel card 2 then.Stainless steel card 2 is divided into two tank body 1, and top is clear water zone, and the bottom is waste liquid (promptly filtering) district.The top, waste liquid district of tank body 1 is provided with the acid discharge pipeline, and the acid discharge pipeline can be connected in descaling bath.Tank body 1 periphery is provided with valves such as into sour flexible valve 5, backflow flexible valve 6, backwash flexible valve 7, spoil disposal flexible valve 8, cleaning agent feed liquor valve 9, air magnetic valve 10, exhaust solenoid valve 11.
The course of work of present embodiment is as follows:
Acid solution in the descaling bath is passed through water pump lifting, enter tank body 1 by advancing sour flexible valve 5, after eptfe film filter bag 3 surface filtrations, impurity in the acid solution is attached on the eptfe film filter bag 3, form mud, the top acid discharge pipeline that the acid solution after the filtration enters tank body 1 again is back in the descaling bath.
During backwash, advance sour pump and do not quit work, only will advance sour flexible valve 5 and close, backflow flexible valve 6 is opened, and backwash flexible valve 7 is also opened, at this moment, acid solution does not enter in the filter, and being back to descaling bath, owing to stop feed liquor, internal pressure reduces in the filter, acid solution after the filtration oppositely flows out by film filter bag 3 inner bags and enters in the filter, discharge by backwash flexible valve 7 again, simultaneously the mud that is attached on film filter bag 3 surfaces is washed away, sink to the awl bottom of tank body 1.At this moment, open spoil disposal flexible valve 8, mud is discharged in tank body 1, enters products for further processing in the sludge-tank.
When initial start-up, all be air in the tank body 1, then need exhaust solenoid valve 11 is opened, to guarantee tank body 1 internal pressure equilibrium.
When filter need clean, the cleaning agent liquid-feeding pump is inserted on the cleaning agent feed liquor valve 9, the cleaning agent feed liquor can be opened air magnetic valve 10 after finishing, and fully stirs, and is beneficial to clean.
The filter of present embodiment, the pickling lines 10%～15%HNO of steel mill is used in membrane pore size＜1 micron
3Saturated nitration mixture in+6%～10%HF descaling bath is as filter medium, through learning that under the normal temperature situation, the solid particle polluter in the nitration mixture 99% is trapped after the experiment.Reached the effect of filtering, made the maintenance interval of this factory's pickling lines extend to one month by a week.
Claims (1)
1. microporous film filter that is applied in the acid liquor filtering, comprise: tank body, the stainless steel card, filter bag support cages bone, advance sour flexible valve, the backflow flexible valve, the backwash flexible valve, the spoil disposal flexible valve, cleaning agent feed liquor valve, the air magnetic valve, exhaust solenoid valve, it is characterized in that, also comprise the eptfe film filter bag, the eptfe film filter bag is enclosed within on the filter bag support cages bone, by screw all filter bag support cages bones are fixed on the stainless steel card then, the stainless steel card is divided into two tank body, top is clear water zone, the bottom is the waste liquid district, the top, waste liquid district of tank body is provided with the acid discharge pipeline, and the tank body periphery is provided with into sour flexible valve, the backflow flexible valve, the backwash flexible valve, the spoil disposal flexible valve, cleaning agent feed liquor valve, the air magnetic valve, exhaust solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101738732A CN101468265B (en) | 2007-12-29 | 2007-12-29 | Microporous film filter for acid liquor filtering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101738732A CN101468265B (en) | 2007-12-29 | 2007-12-29 | Microporous film filter for acid liquor filtering |
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| Publication Number | Publication Date |
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| CN101468265A true CN101468265A (en) | 2009-07-01 |
| CN101468265B CN101468265B (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101738732A Expired - Fee Related CN101468265B (en) | 2007-12-29 | 2007-12-29 | Microporous film filter for acid liquor filtering |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468264B (en) * | 2007-12-29 | 2011-12-07 | 上海同济科蓝环保设备工程有限公司 | Microporous film filter for processing heavy metal wastewater |
| CN104192805B (en) * | 2014-10-10 | 2016-06-15 | 上海清瑞环保科技有限公司 | The process of Fluohydric acid. is recovered by filtration from etching machine production line |
| CN106139681A (en) * | 2016-08-11 | 2016-11-23 | 贵阳开磷化肥有限公司 | A kind of phosphor ammonium slurry defecator and the cleaning method of this device |
| TWI734659B (en) * | 2021-02-09 | 2021-07-21 | 上品綜合工業股份有限公司 | Fluororesin filter device, unit and its manufacturing method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1229001A (en) * | 1998-03-16 | 1999-09-22 | 韩国净水工业株式会社 | Micro-filtration method using fiber hose and apparatus thereof |
| CN2415825Y (en) * | 2000-04-06 | 2001-01-24 | 江西省萍乡市高铝工业瓷厂 | Efficient filter |
| CN2461638Y (en) * | 2000-09-12 | 2001-11-28 | 江苏省宜兴非金属化工机械厂 | Ceramic filtering tube and filter for separating micron from titan white wasted water |
| CN1170619C (en) * | 2000-09-26 | 2004-10-13 | 王蛟 | Membrane filter |
| CN2460183Y (en) * | 2000-12-20 | 2001-11-21 | 袁小平 | Sewage treater |
| CN101468264B (en) * | 2007-12-29 | 2011-12-07 | 上海同济科蓝环保设备工程有限公司 | Microporous film filter for processing heavy metal wastewater |
-
2007
- 2007-12-29 CN CN2007101738732A patent/CN101468265B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468264B (en) * | 2007-12-29 | 2011-12-07 | 上海同济科蓝环保设备工程有限公司 | Microporous film filter for processing heavy metal wastewater |
| CN104192805B (en) * | 2014-10-10 | 2016-06-15 | 上海清瑞环保科技有限公司 | The process of Fluohydric acid. is recovered by filtration from etching machine production line |
| CN106139681A (en) * | 2016-08-11 | 2016-11-23 | 贵阳开磷化肥有限公司 | A kind of phosphor ammonium slurry defecator and the cleaning method of this device |
| CN106139681B (en) * | 2016-08-11 | 2019-02-15 | 贵阳开磷化肥有限公司 | A kind of cleaning method of phosphor ammonium slurry filter device and the device |
| TWI734659B (en) * | 2021-02-09 | 2021-07-21 | 上品綜合工業股份有限公司 | Fluororesin filter device, unit and its manufacturing method |
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| Publication number | Publication date |
|---|---|
| CN101468265B (en) | 2010-12-01 |
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