CN101480544A - Double-face filter board-shaped micropore ceramic and method for producing the same - Google Patents
Double-face filter board-shaped micropore ceramic and method for producing the same Download PDFInfo
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- CN101480544A CN101480544A CNA2009100033292A CN200910003329A CN101480544A CN 101480544 A CN101480544 A CN 101480544A CN A2009100033292 A CNA2009100033292 A CN A2009100033292A CN 200910003329 A CN200910003329 A CN 200910003329A CN 101480544 A CN101480544 A CN 101480544A
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Abstract
The invention relates to a double-sided filter plate-shaped micro-porous ceramic for filtering fluid and a manufacturing method thereof. The double-sided filter plate-shaped micro-porous ceramic comprises two plate-shaped micro-porous ceramics which are jointed mutually; bonding agents for bonding the two plate-shaped micro-porous ceramics into a whole are arranged in the edge areas of two joint surfaces; fluid effluent surfaces are arranged in the other areas of the joint surfaces; fluid influent surfaces are arranged on the other surfaces and the lateral surfaces of the plate-shaped micro-porous ceramics; a diversion channel is arranged between the two joint surfaces; and a fluid effluent opening is arranged on the double-sided filter plate-shaped micro-porous ceramic. When the double-sided filter plate-shaped micro-porous ceramic is used for filtering, the fluid enters from the influent surfaces of the micro-porous ceramics and flows out from the effluent surfaces of the micro-porous ceramics after penetrating through the micro-porous ceramics, namely the fluid enters into the diversion channel and then flows into the effluent openings of the micro-porous ceramics along the diversion channel. The double-sided filter plate-shaped micro-porous ceramic has the remarkable advantages that water discharges smoothly when the water is filtered; the diversion channel is ensured to be positioned at the center of the double-sided filter plate-shaped micro-porous ceramic; the service life of the micro-porous ceramics is prolonged remarkably; the structure is compact; the manufacturing procedure is simple; and the cost is lower.
Description
Technical field
The present invention relates to the filtering flow technical field, relate in particular to a kind of double-face filter board-shaped micropore ceramic and manufacture method thereof.
Background technology
Micropore ceramics as filtering material use in the water treatment facilities, because of possessing lot of advantages, for example cost is lower, can conveniently clean after the obstruction, flow is all replied basically after cleaning, and filtering accuracy does not descend, and filter process can keep water stabilization from start to finish, or the like, so be used widely at present.
Double-face filter board-shaped micropore ceramic, because of compact conformation, filter area is big, is used widely rapidly.
Disclosed a kind of double side microporous ceramic element structure as Chinese patent water purifier micropore ceramic filter element (patent No. is 200520000553.3).This structure is to connect dividing plate with two micropore ceramics conglutinates by one, connect the T-shaped cross section of dividing plate outer rim part last plane, go up medial surface and lower plane, time medial surface respectively be hemispheric micropore ceramics and be tightly connected, the centre that connects dividing plate is provided with the adapter of passing one of them potsherd center, and this adapter and this potsherd are tightly connected.But there is following problems in this ceramic component:
1. because of micropore ceramics is hydrophilic material, water can be full of the whole holes in the micropore ceramics, is extreme difference so be immersed in the gas permeability of the pottery in the water, and in the technical program, the possibility that gas is crossed from the passing through micropores of pottery does not have basically; In addition, the density of gas is more much smaller than water, and the trend of come-up is arranged, and does not have the trend with the current direction current downflow, so the gas in the ceramic component internal cavities just can not be discharged.Gas in the ceramic component internal cavities can not arranged, and water outlet is not smooth in the time of will causing using.
2. bad with the adhesive property of pottery because of plastics, in order to strengthen adhesive strength, connect dividing plate two circle bonding planes are set between edge and layered ceramic, improve adhesive strength by increasing bond area.Whole assembly is provided with 5 circle bonding planes, causes the production process more complicated, reliability decrease, and need to consume plastics, production cost is higher.
3. the sealing between adapter and the pottery is unreliable.Ceramic component production finishes, and in follow-up transportation, use, adapter wherein is easy to be subjected to the external force roof pressure.When the external force of roof pressure is big, just may destroy the sealing between adapter and the pottery, because the bond area of this bonding plane is very little, adhesive strength is also very little.
As a kind of improvement, a kind of tabular two-sided filtration type micro-porous ceramic structure and manufacture method thereof have been disclosed as Chinese patent plate type and two surface filtration type micro-porous ceramic structure (patent No. is 200610008433.7) to above-mentioned patented technology.In this technology, employing can be converted into the material of gas and make reticulate perforation plate under the ceramic sintering temperature, when making ceramic batch, reticulate perforation plate is inserted in the middle of the blank, reticulate perforation plate when high-temperature firing, be converted into gas and disappear the back left space just form netted flow-guiding channel, netted flow-guiding channel is arranged on the centre of plate shaped micropore ceramic thickness direction.The section thickness of flow-guiding channel is small-sized in this technology, and current can be extruded micropore ceramics with current with the gas in the flow-guiding channel during filtration, thus water outlet smoothness when filtering, and more compact structure, production cost is lower.But the reticulate perforation plate that uses in this technology generally adopts inexpensive plastic (as polypropylene) to be formed by injection molding, and this following problems just occurs:
1. because of orifice plate is very thin network structure, buckling deformation takes place very easily, make orifice plate not in one plane, the flow-guiding channel that the result makes this reticulate perforation plate form can not be in the middle of tabular two-sided filtering micropore ceramic thickness everywhere.
2. even reticulate perforation plate is more smooth, owing to there is not suitable location measure, also be difficult to realize it is just in time placed the middle of tabular two-sided filtering micropore ceramic thickness and parallel with the board plane of plate shaped micropore ceramic on technology, this can not guarantee that too flow-guiding channel is in the center of plate shaped micropore ceramic thickness everywhere.
After micropore ceramics stops up, normally adopt and scrub or scrape the strainability that the method for washing is recovered micropore ceramics.Owing to can not guarantee that flow-guiding channel is in the center of plate shaped micropore ceramic thickness everywhere, micropore ceramics scrub or scrape wash several times after, flow-guiding channel near the plate shaped micropore ceramic outer surface will come out prematurely, just worn or scrape and wear by too early scrubbing brush, cause micropore ceramics to be scrapped prematurely, influence service life.
For two-sided filtering micropore ceramic, eliminate all deficiencies of above-mentioned prior art, also need technological innovation.
Summary of the invention
The objective of the invention is at the deficiency of above-mentioned prior art present situation and a kind of double-face filter board-shaped micropore ceramic is provided, be mainly used in thinlyfluids such as filtered water, wine, beverage, also can be used for filtering gas.
Another object of the present invention provides the manufacture method of making above-mentioned tabular two-sided filtering micropore ceramic.
The technical scheme of double-face filter board-shaped micropore ceramic of the present invention is: comprise two plate shaped micropore ceramics of fitting mutually, the fringe region of binding face is a bonding plane, bonding plane is provided with the bonding agent that two plate shaped micropore ceramics is sticked into one, all the other zones of binding face are the fluid effluent face, the another side of plate shaped micropore ceramic and side are that fluid flows into face, gap between two effluent faces just forms flow-guiding channel, and double-face filter board-shaped micropore ceramic is provided with the fluid flow export.
The shape of described plate shaped micropore ceramic can be circular, can be rectangle, also can be other shape.
Described plate shaped micropore ceramic can be homogeneous micropore ceramics (being that filtering accuracy is even everywhere), it also can be the micropore ceramics that has the precision gradient, promptly the top layer at the face of inflow is the higher filter course of filtering accuracy, and portion partly is the lower supporting layer of filtering accuracy to effluent face within it, be beneficial to when guaranteeing filtering accuracy, can reduce filtration resistance, increase filtering traffic.The filtering accuracy of micropore ceramics is not less than 10 microns, and for effective filtering bacterium, preferred filtering accuracy is not less than 0.4 micron.
Described bonding agent is meant and can be integral and forms the bonding agent that is tightly connected in the abutting edge two plate shaped micropore ceramics are bonding, as epoxy resin, and silicon rubber (704) etc.Find through test, adhesive property between pottery and the pottery can satisfy requirement of the present invention, in the technology of the present invention, adopt once the little splicing tape of circle area and two plate shaped micropore ceramics firmly and hermetically can be sticked into one, make that double-face filter board-shaped micropore ceramic of the present invention is simple in structure, production process is also simple, and manufacturing cost is lower.
Described binding face can be the plane.Even because very smooth micropore ceramics surface, on microcosmic, remain uneven, such two micropore ceramics are fitted, its joint place still exists the small runner that liquid or gas are therefrom flow through, i.e. flow-guiding channel.
Described binding face also can be the surface that is provided with groove, but the fringe region (being bonding plane) at binding face must be can be with two bonding planes that are integral and form sealing state in the abutting edge of plate shaped micropore ceramic, that is to say that the part that is provided with groove can only be the effluent face part on the binding face.The degree of depth of groove should be not more than 3 millimeters, preferably is not more than 1 millimeter, and current are extruded micropore ceramics with the gas in the flow-guiding channel with current when being beneficial to filter.Described groove can be radiation shape, can be ringwise or arc, also can be other shape.
Described binding face also can be that edge region is the plane (being bonding plane) of projection, and all the other zones (being effluent face) is recessed plane.On recessed plane, also can be provided with point, bar, muscle or the ring of projection.The height of point, bar, muscle or the ring of projection must not be higher than the convex plane at edge, and it is bonding mutually to be beneficial to two bonding planes.
Described fluid flow export can be arranged on the center of plate shaped micropore ceramic, can be arranged on the limit, also can be arranged on other zone, promptly can determine according to the matching requirements of place equipment.Be connected with place equipment for the ease of double-face filter board-shaped micropore ceramic, fluid flow export place is provided with adapter, takes over the flow-guiding channel that inner chamber is communicated with double-face filter board-shaped micropore ceramic, is about to it and makes the double-face filter board-shaped micropore ceramic assembly.And preferably the connected mode of this assembly can be strengthened the applying of two micropore ceramics.For example adopt to have externally threaded adapter, nut and sealing ring and be connected, can make two micropore ceramics fit tightlyer behind the nut screwing clamping.
The inflow face of plate shaped micropore ceramic can be the light face, does not promptly have the shape (as point, muscle, bar etc.) of projection on the inflow face, does not also have recessed shape (as groove etc.).In order to increase filter area, inflow face can have projection or recessed shape, as convex tendon, raised line, salient point or groove etc.Described convex tendon or groove can be radiation ring shape, also can be other shape.
The manufacture method of described double-face filter board-shaped micropore ceramic is:
1. make monolithic plate shaped micropore ceramic blank with slip casting method or pressing earlier;
2. under the ceramic sintering temperature, fire the monolithic plate shaped micropore ceramic;
3. coat bonding agent at the fringe region of monolithic plate shaped micropore ceramic binding face;
4. two plate shaped micropore ceramic binding faces are fitted mutually, make it to be bonded into one.
The double-face filter board-shaped micropore ceramic that has the precision gradient for manufacturing, can make the supporting layer blank with slip casting method or pressing earlier, apply the higher filter course of one deck filtering accuracy at its inflow face again, and then fire, again two plate shaped micropore ceramics are bonded into one.
The technology of the present invention is because the plate shaped micropore ceramic regular shape, can stack shove charge easily when firing, and it is not yielding, do not consume plastic products when making flow-guiding channel, follow-up bonding process is also very simple, is convenient to produce in batches, so manufacturing cost is lower, and can guarantee that flow-guiding channel is in the center of tabular two-sided filtering micropore ceramic thickness everywhere, thereby improve significantly the service life of micropore ceramics.
The beneficial effect of the technology of the present invention is: water outlet smoothness during filtered water, can guarantee that flow-guiding channel is in the center of double-face filter board-shaped micropore ceramic thickness everywhere, significantly improve the service life of micropore ceramics, and compact conformation, manufacturing process are simple, cost is lower.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one.
Fig. 2 is the monolithic plate shaped micropore ceramic stereogram among Fig. 1.
Fig. 3 is the structural representation of the embodiment of the invention two.
Fig. 4 is the monolithic plate shaped micropore ceramic stereogram among Fig. 3.
Fig. 5 is the structural representation of the embodiment of the invention three.
Fig. 6 is the monolithic plate shaped micropore ceramic stereogram among Fig. 5.
Fig. 7 is the structural representation of the embodiment of the invention four.
Fig. 8 is the monolithic plate shaped micropore ceramic stereogram among Fig. 7.
Fig. 9 is the structural representation of the embodiment of the invention five
Figure 10 is the A of Fig. 9---the A cutaway view.
The specific embodiment
Describe the present invention below in conjunction with concrete accompanying drawing, but be to be understood that the detailed description does not here constitute limiting the scope of the invention.
Embodiment one: in conjunction with Fig. 1, shown in Figure 2, present embodiment is the double-face filter board-shaped micropore ceramic assembly that band is taken over, it comprises the plate shaped micropore ceramic 2 that two circles are fitted mutually, the fringe region of binding face is provided with the complete planar annular 11 of projection, planar annular 11 is provided with the silicon rubber 1 that two plate shaped micropore ceramics 2 can be sticked into one, all the other zones of binding face are fluid effluent face 4, cavity between the effluent face 4 of two plate shaped micropore ceramics forms flow-guiding channel 8, the center of plate shaped micropore ceramic 2 is provided with through hole 32, through hole 32 is the flow export of micropore ceramics, the edge of through hole 32 is provided with protruding planar annular 12 in the effluent face side, has groove 9 on the planar annular 12; The effect of groove 9 is to increase area of passage, makes flow-guiding channel 8 more unimpeded; Planar annular 11 and planar annular 12 are in the sustained height position, be provided with in the through hole 32 and take over 5, the middle part of adapter 5 is provided with the through hole 7 that is communicated with flow-guiding channel 8, taking over 5 is tightly connected with upper and lower surperficial 3 of double-face filter board-shaped micropore ceramic respectively by last sealing ring 6, lower seal 43 and nut 10, after tightening, nut 10 can strengthen the mutual applying of two micropore ceramics 2, upper and lower surperficial 3 and the side 48 of double-face filter board-shaped micropore ceramic is the inflow face of micropore ceramics, and inflow face is the light face.
The manufacture method of double-face filter board-shaped micropore ceramic is in the present embodiment:
1. make the blank of monolithic plate shaped micropore ceramic earlier with slip casting method or pressing;
2. under the ceramic sintering temperature, fire the monolithic plate shaped micropore ceramic;
3. on the planar annular of monolithic plate shaped micropore ceramic binding face fringe region, be coated with silicon rubber;
4. two plate shaped micropore ceramic binding faces are fitted mutually, make it to be bonded into one;
5. using sealing ring 6, lower seal 43 and nut 10 again will take over 5 and load onto.
Embodiment two: in conjunction with Fig. 3, shown in Figure 4, present embodiment is the double-face filter board-shaped micropore ceramic assembly that band is taken over, it comprises two circular plate shaped micropore ceramics 14 of fitting mutually, its binding face is the plane, annular region at the binding face edge is provided with the silicon rubber 13 that two plate shaped micropore ceramics 14 can be sticked into one, all the other zones of binding face are the effluent face of micropore ceramics, and the slit between two effluent faces forms flow-guiding channel 16; The upper and lower inflow face of double-face filter board-shaped micropore ceramic is provided with annular convex rib 15, and its effect is to increase filter area.Other requirement of present embodiment is identical with embodiment one.
Embodiment three: in conjunction with Fig. 5, shown in Figure 6, present embodiment is the double-face filter board-shaped micropore ceramic assembly that band is taken over, it comprises two plate shaped micropore ceramics 18 of fitting mutually, the edge of its binding face is provided with the complete planar annular 21 of projection, planar annular 21 is provided with the silicon rubber 17 that two plate shaped micropore ceramics 18 can be sticked into one, and all the other zones of binding face are the fluid effluent face; Cavity between the effluent face of two plate shaped micropore ceramics 18 forms flow-guiding channel 20; The center of plate shaped micropore ceramic 18 is provided with through hole 34, and through hole 34 is the flow export of micropore ceramics, and the edge of through hole 34 is provided with protruding planar annular 24 in the effluent face side, has groove 23 on the planar annular 24; The effect of groove 23 is to increase area of passage, makes flow-guiding channel 20 more unimpeded; Zone on the binding face between planar annular 21 and 24 is provided with radial convex tendon 22; Planar annular 21, planar annular 24 and convex tendon 22 are in the sustained height position; Upper and lower surperficial 19 and the side 47 of present embodiment double-face filter board-shaped micropore ceramic is inflow face, and inflow face is the light face.Other requirement of present embodiment is identical with embodiment one.
Embodiment four: in conjunction with Fig. 7, shown in Figure 8, present embodiment is the double-face filter board-shaped micropore ceramic assembly that band is taken over, it comprises the plate shaped micropore ceramic that two circles are fitted mutually, the fringe region of plate shaped micropore ceramic binding face is provided with complete planar annular 39, planar annular 39 is provided with the silicon rubber 46 that two plate shaped micropore ceramics can be sticked into one, all the other zones of binding face are the fluid effluent face, effluent face is provided with radiation shape groove 41 and the ring-shaped groove 40 that mutual intersection is communicated with, partial radiation shape groove 41 is communicated with the through hole 42 at micropore ceramics center, through hole 42 is the flow export of micropore ceramics, and the cavity between the effluent face of two plate shaped micropore ceramics forms flow-guiding channel 38; Described plate shaped micropore ceramic is provided with the precision gradient, promptly be provided with the higher filter course of filtering accuracy 37 on the top layer of plate shaped micropore ceramic inflow face (the upper and lower surface and the side that refer to double-face filter board-shaped micropore ceramic), its inside partly is the lower supporting layer of filtering accuracy 36 to effluent face.
The manufacture method of the double-face filter board-shaped micropore ceramic of band precision gradient is in the present embodiment:
1. make monolithic plate shaped micropore ceramic supporting layer blank with slip casting method or pressing earlier;
2. apply the very high filter course of one deck filtering accuracy in the inflow face and the side of supporting layer;
3. under the ceramic sintering temperature, fire the monolithic plate shaped micropore ceramic;
4. on the planar annular 39 of monolithic plate shaped micropore ceramic binding face fringe region, be coated with silicon rubber 46;
5. the binding face of two plate shaped micropore ceramics is fitted mutually, make it to be bonded into one;
6. using sealing ring, lower seal and nut again loads onto adapter.
Other requirement of present embodiment is identical with embodiment one.
Embodiment five: in conjunction with Fig. 9, shown in Figure 10, present embodiment is the double-face filter board-shaped micropore ceramic assembly that band is taken over, it comprises two rectangular plate shape micropore ceramics 26 of fitting mutually, the fringe region of its binding face is provided with the planar annular of projection, all the other zones of binding face are the effluent face of micropore ceramics, and the cavity between two effluent faces is a flow-guiding channel 27; The planar annular of edge region projection is provided with the silicon rubber 25 that two rectangular plate shape micropore ceramics 26 can be sticked into one, and this protruding planar annular is at the right-hand opening 29 that is provided with, and opening 29 is the flow export of micropore ceramics; The right side of double-face filter board-shaped micropore ceramic is provided with connector 30, connector 30 is provided with takes over 35, the outer surface of adapter 35 is provided with groove, be provided with 0 shape sealing ring 31 in the groove, connector 30 be provided with can with the upper and lower surface and the adaptive shape of right flank on double-face filter board-shaped micropore ceramic right side, connector 30 is sealedly and fixedly connected by silicon rubber 28 with rectangular plate shape micropore ceramics 26; Upper and lower surperficial 45, the left surface 50 of present embodiment double-face filter board-shaped micropore ceramic, leading flank 51 and trailing flank 52 are inflow face, and inflow face is the light face.Other requirement of present embodiment is identical with embodiment one.
Claims (10)
1. double-face filter board-shaped micropore ceramic, it is characterized in that: comprise two plate shaped micropore ceramics of fitting mutually, the fringe region of binding face is provided with the bonding agent that two plate shaped micropore ceramics is sticked into one, all the other zones of binding face are the fluid effluent face, and double-face filter board-shaped micropore ceramic is provided with the fluid flow export.
2. according to the described double-face filter board-shaped micropore ceramic of claim 1, it is characterized in that: the fringe region of described binding face is provided with the planar annular of projection.
3. according to the described double-face filter board-shaped micropore ceramic of claim 1, it is characterized in that: described effluent face is provided with convex tendon or groove.
4. according to the described double-face filter board-shaped micropore ceramic of claim 1, it is characterized in that: described micropore ceramics has the precision gradient.
5. according to the described double-face filter board-shaped micropore ceramic of claim 1, it is characterized in that: the inflow mask of micropore ceramics has projection or recessed shape.
6. according to the described double-face filter board-shaped micropore ceramic of claim 1, it is characterized in that: described fluid flow export place is provided with adapter.
7. according to the described double-face filter board-shaped micropore ceramic of claim 1, it is characterized in that: described binding face is the plane.
8. according to the described double-face filter board-shaped micropore ceramic of claim 1, it is characterized in that: the center of micropore ceramics is provided with through hole.
9. the manufacture method of a double-face filter board-shaped micropore ceramic is characterized in that comprising the steps: that a. makes monolithic plate shaped micropore ceramic blank with slip casting method or pressing earlier; B. under the ceramic sintering temperature, fire the monolithic plate shaped micropore ceramic; C. coat binding agent at the fringe region of monolithic plate shaped micropore ceramic binding face; D. two plate shaped micropore ceramic binding faces are fitted mutually, make it to be bonded into one.
10. according to the manufacture method of the described double-face filter board-shaped micropore ceramic of claim 9, it is characterized in that: step a makes the lower supporting layer blank of filtering accuracy with slip casting method or pressing, increases a step between step a and step b: the higher filter course of coating filtering accuracy on fluid inflow face.
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| CN2009100033292A CN101480544B (en) | 2009-01-14 | 2009-01-14 | Double-face filter board-shaped micropore ceramic and method for producing the same |
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| CN2009100033292A CN101480544B (en) | 2009-01-14 | 2009-01-14 | Double-face filter board-shaped micropore ceramic and method for producing the same |
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| CN101480544A true CN101480544A (en) | 2009-07-15 |
| CN101480544B CN101480544B (en) | 2012-05-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985072A (en) * | 2010-08-12 | 2011-03-16 | 福建新大陆环保科技有限公司 | Hollow filtration disk and laminated filter using same |
| CN103408126A (en) * | 2013-05-31 | 2013-11-27 | 南京大易膜分离科技有限公司 | Support plate for elements of flat membrane bioreactor |
| CN110433541A (en) * | 2019-08-20 | 2019-11-12 | 高云芝 | A kind of production method of filter plate |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04100505A (en) * | 1990-08-20 | 1992-04-02 | Toto Ltd | Preparation of ceramic filter |
| US5730869A (en) * | 1995-01-28 | 1998-03-24 | Koppe; Franz | Porous ceramic filter |
| CN2531862Y (en) * | 2001-04-28 | 2003-01-22 | 高斌 | Ceramic filter board |
| CN1236840C (en) * | 2001-06-08 | 2006-01-18 | 高斌 | Microporous ceramic filter plate and its preparing process |
| CN1238303C (en) * | 2004-07-01 | 2006-01-25 | 上海交通大学 | Negative thermal-expansion coefficient adjustable laminated ceramic matrix composite and preparing method thereof |
| CN100528286C (en) * | 2007-02-03 | 2009-08-19 | 黄樟焱 | Plate microporous ceramic structure with convex rib |
| CN201394386Y (en) * | 2009-01-14 | 2010-02-03 | 黄樟焱 | Double-sided filter-plate-shaped micro-porous ceramic |
-
2009
- 2009-01-14 CN CN2009100033292A patent/CN101480544B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985072A (en) * | 2010-08-12 | 2011-03-16 | 福建新大陆环保科技有限公司 | Hollow filtration disk and laminated filter using same |
| CN101985072B (en) * | 2010-08-12 | 2016-04-13 | 福建新大陆环保科技有限公司 | A kind of hollow filtering table and apply the cascading type filter of this filtering table |
| CN103408126A (en) * | 2013-05-31 | 2013-11-27 | 南京大易膜分离科技有限公司 | Support plate for elements of flat membrane bioreactor |
| CN103408126B (en) * | 2013-05-31 | 2015-06-03 | 南京大易膜分离科技有限公司 | Support plate for elements of flat membrane bioreactor |
| CN110433541A (en) * | 2019-08-20 | 2019-11-12 | 高云芝 | A kind of production method of filter plate |
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| CN101480544B (en) | 2012-05-02 |
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Address after: 315153 Zhejiang city of Ningbo province Yinzhou District Shiqi Street East Building 9, Room 601 Applicant after: Huang Zhangyan Address before: 315200 Huatai Building, 112 Nursery Road, Zhenhai District, Zhejiang, Ningbo, 4B Applicant before: Huang Zhangyan |
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