CN101234271A - Not easy-to-block high-precision micropore ceramic filtering process and device - Google Patents
Not easy-to-block high-precision micropore ceramic filtering process and device Download PDFInfo
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- CN101234271A CN101234271A CNA2007101864203A CN200710186420A CN101234271A CN 101234271 A CN101234271 A CN 101234271A CN A2007101864203 A CNA2007101864203 A CN A2007101864203A CN 200710186420 A CN200710186420 A CN 200710186420A CN 101234271 A CN101234271 A CN 101234271A
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Abstract
A filtering method for a high-precision micro-porous ceramic which is not easy to be blocked and a device thereof consists of a shell of the filtering device, the upper part of which is provided with the high-efficiency micro-porous ceramic, the bottom of which is provided with a water inlet, the top of which is provided with a water outlet and the inner part of which is provided with coagulant or adsorbent. The filtering method is as follows: the gyral flow produced when water flows in is used to mix the coagulant or adsorbent with raw water to enable the matters in the raw water which is easy to block the micro-porous ceramic to combine with the coagulant or adsorbent to form particles with a size bigger than an aperture of the micro-porous ceramics. The particles are suspended or formed a porous filter cake with good water permeability to be attached on a surface of the micro-porous ceramic without going into the inner part of the micro-porous ceramic. Therefore, the micro-porous ceramic is not easy to be blocked with a high filtering precision. The method of the invention can make a filter core of the micro-porous ceramic and also the filtering device of the micro-porous ceramic.
Description
Affiliated technical field
The present invention relates to the water purification technology field, relate in particular to a kind of not susceptible to plugging high-precision micropore ceramic filtering process and device.
Background technology
Micropore ceramics has been used very generally in water treatment field as a kind of filtering material, and it both can adopt the cross-flow filtration mode to use, and also can adopt the traditional filtering mode to use.
Adopt the known technology of micropore ceramic filter to have:
1. cross-flow mode is filtered
The principle that the cross-flow mode is filtered is: filter is provided with water inlet, delivery port and discharge outlet.During filtration, former water flows into from water inlet, and filter back water flows out from delivery port, and dense water is discharged from discharge outlet.In the filter process, current flow along the micropore ceramics surface, filter while flowing.Size is discharged from the discharge outlet of filter at last greater than flowing away along current with the pollutant that approaches the micropore ceramics aperture in the water, can be at the micropore ceramics surface deposition.The advantage that the cross-flow mode is filtered is: micropore ceramics surface be difficult for by the pollutant in the water stop up, plant maintenance is simple.Its shortcoming is: device structure is complicated, energy consumption is bigger.In addition, the utilization if the dense water of discharging does not reflux, then water consumption is big.
2. traditional approach filters
The principle that traditional approach filters is: filter is provided with raw water inlet and filter back water delivery port.During filtration, greater than being trapped within micropore ceramics surface and nearly surface, and form filter cake in the water on the micropore ceramics surface with the pollutant that approaches the micropore ceramics aperture.Having many in the filter cake composition is colloids, and mutually combining between the colloid forms the bigger colloid of size, promptly forms fine and close grume thing.Along with the carrying out of filter process, filter cake is thickening gradually, and the grume thing that is trapped in the micropore ceramics surface also increases and more and more densification thereupon, and the pollutant that is trapped in the nearly surface of micropore ceramics is also more and more.So micropore ceramics surface and nearly surface are tending towards stopping up.After micropore ceramics surface and nearly surface are stopped up, usually can be by cleaning or scrape the filtering feature of the method for washing (be about to be trapped in the pollutant on surface and pollutant and the top layer micropore ceramics on nearly surface together removed) recovery micropore ceramics.The advantage that traditional approach filters is: device structure is simple, the utilization rate of water is higher.Its shortcoming is: micropore ceramics surface and nearly surface are stopped up by the pollutant in the water easily, need often to clean, and maintenance cost is higher.
Micropore ceramics all has certain thickness (usually greater than 5 millimeters), so the filtration of micropore ceramics comprises surface filtration and filtering layer filters two kinds of filter types.For surface filtration, pollutant is trapped within the micropore ceramics surface; Filter for filtering layer, pollutant is adhered to the surface, space of micropore ceramics inside.No matter be to adopt the cross-flow mode to filter, still adopt traditional approach to filter, all can enter micropore ceramics inside for the pollutant (for example less colloid of size in the water) less than the micropore ceramics aperture in the water.Enter the pollutant of micropore ceramics inside, a part will be passed micropore ceramics and be flowed away with filter back water, and another part then is adhered on the pore surface of micropore ceramics inside.Along with the carrying out of filter process, the hole of micropore ceramics inside stops up contaminated thing gradually.The micropore ceramics that inner contaminated thing stops up can not recover filtering feature by cleaning or scrape the method for washing, and generally does to scrap processing.
To sum up, when adopting micropore ceramic filter, realize that device structure is fairly simple, the utilization rate of water is higher, the energy consumption when filtering is less, and be difficult for surface and inner the obstruction, also need technical breakthrough at micropore ceramics.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of not susceptible to plugging high-precision micropore ceramic filtering process and device at the deficiency of above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of not susceptible to plugging high-precision micropore ceramic filtering process, it comprises the steps:
1. coagulant or adsorbent are mixed with the former water of the state of circling round;
2. the material of easy blocking microporous pottery combines with coagulant or adsorbent in the former water, forms the particle of size greater than the micropore ceramics aperture, and these particles and Yuan Shui mix becomes suspension;
3. with high-precision micropore ceramic these suspension are filtered, wherein high-precision micropore ceramic is arranged on the top of filter again, and the hydraulic pressure during filtration is 0.01MPa at least.
The present invention also provides a kind of not susceptible to plugging high-precision micropore ceramic filtering device, it comprises the housing of filter, at the housing internal upper part high-precision micropore ceramic is set, and the bottom of housing is provided with water inlet, the top of housing is provided with delivery port, is provided with coagulant or adsorbent in the housing.
It is aqueous that described coagulant can be, and also can be Powdered or granular, can be divided into flocculating agent and flocculant two big classes, flocculating agent works the steady effect of taking off, flocculant works the flco effect of forming, and some coagulant plays flocculating agent and flocculant double action, and flocculant is also referred to as filter aid or flocculation aid sometimes.Described coagulant mainly contains: aluminum sulfate, alum, aluminium polychloride, polyaluminium sulfate, ferric trichloride, ferrous sulfate, bodied ferric sulfate, poly-ferric chloride, gelatine, polyacrylamide, activated silicic acid and sodium alginate etc.
Described adsorbent has: active carbon, diatomite, activated alumina and activated magnesia etc., adsorbent can be Powdered, also can be fine granularity, the preferred powder powder.
Described water inlet is provided with check valve, prevents that coagulant or adsorbent from leaking from the water inlet.
Described water inlet can be arranged on tangentially, promptly is arranged on the bottom sidewall of housing with tangential manner.The effect of circling round that utilizes tangential current to produce makes former water mix with coagulant or adsorbent.
Described water inlet also can be arranged on axially, promptly is arranged on the base plate of housing with axial manner.At this moment, must can make current produce the blade that circles round, on blade, be provided with the blade cover plate in the upper surface setting of housing base plate.Current are mobile through behind the blade generation being circled round, and the current that circle round will make former water mix with coagulant or adsorbent.
Coagulant or adsorbent can make the material of easy blocking microporous pottery in the former water combine with coagulant or adsorbent with after former water mixes, and perhaps the material of easy blocking microporous pottery mutually combines in the water, becomes the particle of size greater than the micropore ceramics aperture.These particles are suspended state, perhaps form porous and water penetration preferably filter cake be attached to the surface of micropore ceramics, can not enter into micropore ceramics inside.So difficult obstruction of micropore ceramics and filtering accuracy are higher.Along with the carrying out of filter process, the filter cake on micropore ceramics surface can be more and more thicker, and after thickness reached certain size, under the effect of gravity, filter cake can come off downwards.In addition, along with the carrying out of filter process, coagulant or adsorbent also can lose efficacy gradually.So, after the certain water yield of every filtration, coagulant that need more renew or adsorbent.
The filtering accuracy of described micropore ceramics should be higher, and promptly the aperture of micropore ceramics should be less, so that can hold back the size smaller particles, makes it not enter micropore ceramics inside.Specifically, filtering accuracy should be less than 0.4 micron, preferably less than 0.2 micron.
Described housing comprises cylinder, top cover and base plate.The structure of cylinder and top cover, perhaps the structure of cylinder and base plate all can be an integral structure, also can be split-type structural.For integral structure: both can be made a complete part; Also can earlier both be made individual part, adopt welding, welding or bonding method to make both form non-removable being sealedly and fixedly connected again.For split-type structural: can twist the screw thread that closes mutually in both connection part settings, the fitted seal circle is sealedly and fixedly connected both again; Also can bolt hole or screw hole be set in both connection parts, matching fastener and sealing ring are sealedly and fixedly connected again.
Further technical measures of the present invention are: on described housing top sewage draining exit is set.After coagulant or adsorbent inefficacy, it can be discharged from sewage draining exit.New coagulant or adsorbent can add from water inlet.
Further technical measures of the present invention are: on described housing top exhaust outlet is set.Utilize exhaust outlet to discharge the interior gas of housing.
The invention has the beneficial effects as follows:
1. filtering accuracy is higher, and micropore ceramics is difficult for stopping up simultaneously;
2. the filter plant structure is simpler;
3. the utilization rate of water is higher.
Description of drawings
Fig. 1 is the embodiment of the invention one structural representation.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the B-B cutaway view of Fig. 1.
Fig. 4 is embodiment one an inactive state schematic diagram.
Fig. 5 is the embodiment of the invention two structural representations.
Fig. 6 is the A-A cutaway view of Fig. 5.
Fig. 7 is the embodiment of the invention three structural representations.
Fig. 8 is the embodiment of the invention four structural representations.
Fig. 9 is the embodiment of the invention five structural representations.
Figure 10 is the A-A cutaway view of Fig. 9.
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, Fig. 2 and shown in Figure 3, filter comprises the housing that top cover (19), cylinder (15) and base plate (5) are formed; The mixture (16) of tubulose high-precision micropore ceramic (17) and coagulant and Powdered adsorbent is set in housing; Top cover (19) is provided with delivery port (24) and exhaust sewage draining exit (23), and exhaust sewage draining exit (23) is by threaded cap (21) and sealing ring (22) shutoff; Top cover (19) is provided with internal thread, and the top of cylinder (15) is provided with external screw thread, and top cover (19) is sealedly and fixedly connected by sealing ring (20) and screw thread with cylinder (15); Top cover (19) is provided with down the short tube of stretching, and the inner surface of this short tube outer surface and micropore ceramics (17) adopts silicon rubber (18) adhering and sealing; The lower end of micropore ceramics (17) is provided with end cap (14), and end cap (14) is provided with the short tube of stretching, and the inner surface of this short tube outer surface and micropore ceramics (17) lower end adopts the silicon rubber adhering and sealing; End cap (14) is provided with down the short tube of stretching, and the outside of this short tube is with spring (13), and the lower end of spring (13) is supported on the blade cover plate (12), and the effect of spring (13) is the weight that supports micropore ceramics (17); The peripheral upwardly extending short tube inner surface of base plate (5) is provided with internal thread, and the bottom of cylinder (15) is provided with external screw thread, and base plate (5) is sealedly and fixedly connected by sealing ring (6) and screw thread with cylinder (15); Base plate (5) is provided with water inlet, be extended with into water adapter (2) downwards from water inlet, the inner surface of base plate (5) is provided with the blade (11) that generation was circled round when current were flow through, the madial wall that (2) are taken in water inlet is extended with gusset (9), and water inlet is taken in (2) and is provided with spring (10), flap (8), sealing ring (7) and valve seat (3); Spring (10), flap (8), sealing ring (7) and valve seat (3) are formed check valve, and sealing ring (7) is fixed on the flap (8), and gusset (9) played position-limiting action when flap (8) was up and down; Valve seat (3) is provided with O shape circle (4), and O shape circle (4) is as the sealing between valve seat (3) and water inlet adapter (2) inwall; The bottom that (2) are taken in water inlet is provided with screw thread short tube (1), and screw thread short tube (1) is used for the check valve location.
During filtration, current are taken over (2) from water inlet and are entered, and back down check valve earlier, pass blade (11) again, enter the inside of cylinder (15) with the state of circling round.The current of state of circling round will mix with the mixture (16) of coagulant and Powdered adsorbent, make the material of the easy blocking microporous potteries (17) such as colloid in the water become bulky grain by granule.Big heavier part will sedimentation downwards under the gravity effect in these particles, and the current that rise are with its picking-up, make it be the flow regime of circling round that suspends,, certain filtration is arranged also promptly so this part particle also has certain function that stops suspension in the water into; And less lighter another part particle will be trapped in surface formation filter cake by micropore ceramics (17), and can not enter into micropore ceramics inside, so micropore ceramics (17) is difficult for stopping up.Owing to contain Powdered adsorbent in the filter cake, be porous state, so filter cake has good water penetration, can not stop up yet.When filter cake reaches adequate thickness, under the effect of gravity, will come off downwards.
Fig. 1 describes is that wherein coagulant and Powdered adsorbent mixtures (16) is the filtration state, promptly is the flow regime of circling round that suspends.Fig. 4 describes is that wherein coagulant and Powdered adsorbent mixtures (16) is inactive state, after promptly filter process stops a period of time, is the coagulant of suspended state and the state after Powdered adsorbent mixtures (16) sedimentation downwards originally.
Embodiment two: in conjunction with Fig. 5 and shown in Figure 6, filter comprises the housing that body (27) and top cover are formed, at the housing internal upper part mixture of high-precision micropore ceramic (28) and coagulant and Powdered adsorbent is set, the superstructure of filter is identical with embodiment one; Micropore ceramics (28) is the tubular structure that the end is arranged; The base plate of body (27) is provided with boss (25), and boss (25) is with spring (26), and spring (26) is used to support the weight of micropore ceramics (28); Body (27) bottom is provided with tangential water inlet and takes over (29), and the madial wall that (29) are taken in water inlet is extended with gusset (36), and water inlet is taken in (29) and is provided with spring (35), flap (33), sealing ring (34) and valve seat (31); Spring (35), flap (33), sealing ring (34) and valve seat (31) are formed check valve, and sealing ring (34) is fixed on the flap (33), about flap (33) when movable gusset (36) play position-limiting action; Valve seat (31) is provided with O shape circle (32), and O shape circle (32) is as the sealing between valve seat (31) and water inlet adapter (29) inwall; The right part of taking over (29) is provided with screw thread short tube (30), and screw thread short tube (30) is used for the check valve location.
During filtration, current are from tangentially entering filter, and circle round in filter inside, and the mixture with coagulant and Powdered adsorbent when circling round mixes.
Other requirement of present embodiment is identical with embodiment one.
Embodiment three: in conjunction with shown in Figure 7, filter comprises the housing that body (39) and base plate are formed, and the mixture of two-sided filtering micropore ceramic of high accuracy tubulose (38) and coagulant and Powdered adsorbent is set in housing; The top center of housing is provided with delivery port, the delivery port place is provided with water outlet and takes over (43), water outlet take over base plate that (43) have closed bottom, base plate radially extend ring flat-plate (45), open topped, the middle and lower part sidewall is provided with 4 apopores (44) and the middle and upper part is provided with externally threaded structure; Micropore ceramics (38) is provided with water stream channel (37) for the tubular structure of base plate is arranged at top in tube wall and the base plate, the center of base plate is provided with through hole; Between the lower surface on the top of the upper surface of ring flat-plate (45) and body (39), micropore ceramics (38) is housed, and tightens sealing and fixing by sealing ring (40,41) and nut (42).
During filtration, current enter micropore ceramics from the surfaces externally and internally (tubular portion) and the upper and lower surface (bottom parts) of micropore ceramics (38), flow to apopore (44) through water stream channel (37) again, take over the upper end outflow of (43) at last from water outlet, the pollutant in the water is trapped within the surface of micropore ceramics (38).
Present embodiment has adopted two-sided filtering micropore ceramic, has increased filter area, so flow resistance is less, water flow is bigger.
Other requirement of present embodiment is identical with embodiment one.
Embodiment four: in conjunction with shown in Figure 8, filter comprises the housing that body (47) and base plate (46) are formed, the mixture (55) of 3 tabular two-sided filtering micropore ceramics of high accuracy (49) and coagulant and Powdered adsorbent is set in housing, and body (47) and base plate (46) are by revolving molten being sealedly and fixedly connected; The top center of body (47) is provided with delivery port, the delivery port place is provided with water outlet and takes over (52), water outlet take over base plate that (52) have closed bottom, base plate radially extend ring flat-plate (54), open topped, the middle and lower part sidewall is respectively equipped with 4 apopores (53) at the mid-depth position of 3 micropore ceramics (49) and the middle and upper part is provided with externally threaded structure; The mid-depth of micropore ceramics (49) is provided with water stream channel (48); Between the lower surface on the top of the upper surface of ring flat-plate (54) and body (47), 3 micropore ceramics (49) are housed, and tighten sealing and fixing by 4 sealing rings (50) and nut (51).
During filtration, current enter micropore ceramics inside from the upper and lower surface and the side of micropore ceramics (49), flow to apopore (53) through water stream channel (48) again, take over the upper end outflow of (52) at last from water outlet, the pollutant in the water is trapped within the surface of micropore ceramics (49).
Present embodiment has adopted two-sided filtering micropore ceramic, has increased filter area, so flow resistance is less, water flow is bigger.
Other requirement of present embodiment is identical with embodiment one.
Embodiment five: in conjunction with Fig. 9 and shown in Figure 10, filter comprises housing (58), the mixture (66) of 1 tabular two-sided filtering micropore ceramic of high accuracy (56) and coagulant and Powdered adsorbent is set in housing (58), the top center of housing (58) is provided with delivery port, and the delivery port place is provided with water outlet and takes over (62); Micropore ceramics (56) is provided with water stream channel (57) at its mid-depth, the both sides horizontal direction is extended with mount and uses dull and stereotyped (63) at an upper portion thereof, dull and stereotyped (63) are provided with through hole, the top of dull and stereotyped (63) is provided with sealing ring (64), the below of dull and stereotyped (63) is provided with pressing plate (65), is provided with screw (61) in the through hole of dull and stereotyped (63); Micropore ceramics (56) is by screw (61), packing ring (59) and nut (60) the fixed seal connection top in housing (58).
During filtration, current enter micropore ceramics inside from two surfaces of micropore ceramics (56), flow to the upper end of micropore ceramics (56) again through water stream channel (57), take over the upper end outflow of (62) at last from water outlet, the pollutant in the water is trapped within the surface of micropore ceramics (56).
Other requirement of present embodiment is identical with embodiment three.
It should be noted that at last: above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this specification has been described in detail the present invention with reference to the foregoing description,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the claim scope of the present invention.
Claims (10)
1. not susceptible to plugging high-precision micropore ceramic filtering process is characterized in that:
A. adopt the former water of coagulant and the adsorbent a kind of and state of circling round wherein to mix at least;
B. the material of easy blocking microporous pottery combines with coagulant or adsorbent in the former water, forms the particle of size greater than the micropore ceramics aperture, and these particles and Yuan Shui mix becomes suspension;
C. with high-precision micropore ceramic these suspension are filtered again.
2. not susceptible to plugging high-precision micropore ceramic filtering device, the housing that it comprises filter is characterized in that: the housing internal upper part is provided with micropore ceramics, and housing bottom is provided with water inlet, and case top is provided with delivery port, is provided with coagulant or adsorbent in the housing.
3. a kind of not susceptible to plugging high-precision micropore ceramic filtering device according to claim 2, it is characterized in that: described water inlet is arranged on the housing base plate, and current are from axially entering.
4. a kind of not susceptible to plugging high-precision micropore ceramic filtering device according to claim 3 is characterized in that: the inner surface of housing base plate is provided with and can makes current produce the blade that circles round.
5. a kind of not susceptible to plugging high-precision micropore ceramic filtering device according to claim 2, it is characterized in that: described water inlet is arranged on the housing side, and current are from tangentially entering.
6. according to claim 3 or 5 described a kind of not susceptible to plugging high-precision micropore ceramic filtering devices, it is characterized in that: described water inlet is provided with into water adapter, and water inlet is provided with check valve in taking over.
7. a kind of not susceptible to plugging high-precision micropore ceramic filtering device according to claim 2, it is characterized in that: described micropore ceramics is tubulose micropore ceramics or plate shaped micropore ceramic.
8. a kind of not susceptible to plugging high-precision micropore ceramic filtering device according to claim 7, it is characterized in that: the below of described tubulose micropore ceramics is provided with spring.
9. a kind of not susceptible to plugging high-precision micropore ceramic filtering device according to claim 2, it is characterized in that: described housing top is provided with sewage draining exit.
10. a kind of not susceptible to plugging high-precision micropore ceramic filtering device according to claim 2, it is characterized in that: described adsorbent is a Powdered Activated Carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101864203A CN101234271B (en) | 2007-11-16 | 2007-11-16 | Not easy-to-block high-precision micropore ceramic filtering process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101864203A CN101234271B (en) | 2007-11-16 | 2007-11-16 | Not easy-to-block high-precision micropore ceramic filtering process and device |
Publications (2)
| Publication Number | Publication Date |
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| CN101234271A true CN101234271A (en) | 2008-08-06 |
| CN101234271B CN101234271B (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101864203A Expired - Fee Related CN101234271B (en) | 2007-11-16 | 2007-11-16 | Not easy-to-block high-precision micropore ceramic filtering process and device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103334436A (en) * | 2013-06-17 | 2013-10-02 | 北京市政建设集团有限责任公司 | Dual slurry injection pipe end head mixing device |
| CN104150638A (en) * | 2014-08-15 | 2014-11-19 | 周道裕 | Portable water-purifying filter core for individual soldier and portable water-purifying kettle for individual soldier |
| CN105399231A (en) * | 2015-12-08 | 2016-03-16 | 周永明 | A water filtration and purification device |
| CN111186951A (en) * | 2020-01-14 | 2020-05-22 | 北京中科极地抗衰老技术研究院(有限合伙) | A kind of container |
| CN111214878A (en) * | 2018-11-26 | 2020-06-02 | 杭州科百特过滤器材有限公司 | Filter |
| CN113461226A (en) * | 2021-08-07 | 2021-10-01 | 广东云汉智能科技有限公司 | Sewage circulating and filtering system |
| CN113600347A (en) * | 2021-07-21 | 2021-11-05 | 宜都兴发化工有限公司 | Filter-pressing release agent for phosphate rock flotation tailings and use method thereof |
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2007
- 2007-11-16 CN CN2007101864203A patent/CN101234271B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334436A (en) * | 2013-06-17 | 2013-10-02 | 北京市政建设集团有限责任公司 | Dual slurry injection pipe end head mixing device |
| CN104150638A (en) * | 2014-08-15 | 2014-11-19 | 周道裕 | Portable water-purifying filter core for individual soldier and portable water-purifying kettle for individual soldier |
| CN105399231A (en) * | 2015-12-08 | 2016-03-16 | 周永明 | A water filtration and purification device |
| CN105399231B (en) * | 2015-12-08 | 2018-02-23 | 周永明 | A kind of water filtration purifier |
| CN111214878A (en) * | 2018-11-26 | 2020-06-02 | 杭州科百特过滤器材有限公司 | Filter |
| CN111186951A (en) * | 2020-01-14 | 2020-05-22 | 北京中科极地抗衰老技术研究院(有限合伙) | A kind of container |
| CN113600347A (en) * | 2021-07-21 | 2021-11-05 | 宜都兴发化工有限公司 | Filter-pressing release agent for phosphate rock flotation tailings and use method thereof |
| CN113600347B (en) * | 2021-07-21 | 2022-11-08 | 宜都兴发化工有限公司 | Filter-pressing release agent for phosphate rock flotation tailings and use method thereof |
| CN113461226A (en) * | 2021-08-07 | 2021-10-01 | 广东云汉智能科技有限公司 | Sewage circulating and filtering system |
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| CN101234271B (en) | 2011-01-05 |
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