CN102211808A - Double-layer high-efficiency superfine-micropore aeration header - Google Patents
Double-layer high-efficiency superfine-micropore aeration header Download PDFInfo
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- CN102211808A CN102211808A CN2011100575240A CN201110057524A CN102211808A CN 102211808 A CN102211808 A CN 102211808A CN 2011100575240 A CN2011100575240 A CN 2011100575240A CN 201110057524 A CN201110057524 A CN 201110057524A CN 102211808 A CN102211808 A CN 102211808A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention belongs to the field of environmental protection equipment, and discloses a double-layer high-efficiency superfine-micropore aeration header. The double-layer high-efficiency superfine-micropore aeration header comprises an inner-layer conventional brown corundum aeration header with the pore diameter of 150-250 microns, and a corundum superfine micropore layer coated on the outer surface of the brown corundum aeration header, wherein the corundum superfine micropore layer is 0.3-0.7 mm in thickness and has the pore diameter of 56-80 microns. In the double-layer high-efficiency superfine-micropore aeration header, the conventional brown corundum layer is adopted to serve as a base layer and has the advantages of large pore diameter, high strength, good air-permeability, small resistance, therefore, air can pass through the base layer rapidly in a large quantity; furthermore, when the air reaches the outer layer, namely, the corundum superfine micropore layer, the micropores of the layer are fine and close so that the air is dispersed into very fine bubbles to enter into water so as to rapidly oxygenate the water. Synchronously, the bubbles are extremely fine so that the oxygen utilization coefficient of the air in the water is greatly improved, additionally, the corundum superfine micropore layer is very thin so that the resistance to the air passing through the corundum superfine micropore layer is greatly reduced, therefore, the aims of energy saving and high efficiency are achieved.
Description
Technical field
The invention belongs to the environmental protection equipment field, relate to double-deck efficient ultra-fine micro porous aeration head.
Background technology
China is a country that drought and water shortage is serious.The Freshwater resources total amount is 28000 billion cubic meters, accounts for 6% of water globe resource, is only second to Brazil, Russia and Canadian, occupy the 4th in the world, but have only 2200 cubic metres per capita, only be world average level 1/4, the U.S. 1/5, be the whole world one of 13 countries that water resources is the poorest per capita.Along with economy, fast development of society, nowadays China be faced with shortage of water resources, the with serious pollution present situation of water.
Water treatment occupies extremely important status in national product and life, whether the advanced person who has or not water treatment, water technology is that a country produces, one of important symbol of standard of living height and civilization degree.Yet the water treatment service still is a novel industry in China, though newly-built large quantities of water treatment plant at present in all parts of the country, the power consumption of its treatment process and treatment facility is higher, causes cost of water treatment high.For example, the used surface aeration equipment of sewage biochemical treatment is at present brushed surface aeration machine as changeing, the inversed umbrella type surface aeration machine, the energy utilization rate of plate-spinning surface aeration machine is that every kilowatt-hour of oxygenation capacity is 1.6～1.7kg, and the energy utilization rate of bottom aerators such as middle micropore be every kilowatt-hour of oxygenation capacity is 2.6kg, and all can the low defective of consumption high efficiency for ubiquity.
From the medium-term and long-term development strategy of China, pollution reduction will be placed to the first place, and the high treatment facility of energy consumption will lose competitive power, and undoubtedly, the water technology of energy-saving and cost-reducing type will become the secular developing direction of China.
Summary of the invention
The objective of the invention is provides a kind of bilayer efficient ultra-fine micro porous aeration head in order to overcome the low deficiency of existing aerator energy consumption high efficiency.
Another object of the present invention provides a kind of double-deck aerator that this aeration head is installed, and this aerator need not to increase supplementary unit, can be implemented in 6～7 meters and oxygen-transfer efficiency and energy utilization rate be improved a lot during aeration under water.
The efficient ultra-fine micro porous aeration head of a kind of bilayer comprises that the aperture is that the conventional brown corundum aeration head of internal layer of 150～250 μ m and the thickness of coating described brown corundum aeration head outside surface are 0.3～0.7mm, and the aperture is the ultra-fine microporous layers of the corundum of 56～80 μ m.
Wherein, the wall thickness of the conventional brown corundum aeration head of described internal layer is 12mm to 14mm, is shaped as bell jar type, dome-shaped, ball-type, plate, tubular-type, watt shape or square plate shape.
The particle diameter of corundum in granules is 100 μ m to 200 μ m in the ultra-fine microporous layers of described corundum.
Corundum in the ultra-fine microporous layers of described corundum is brown corundum or white fused alumina.
The efficient ultra-fine micro porous aeration head of described bilayer can prepare by the following method:
(1) with the surface grinding of described brown corundum aeration head finished product;
(2) with brown corundum or the white fused alumina particle of particle diameter between 100 μ m to 200 μ m, add the carboxymethyl cellulose that is equivalent to brown corundum or white fused alumina gross weight 5%～20%, stir into muddy, use mechanically spraying to form the ultra-fine microporous layers of corundum again in the brown corundum aeration head finished surface described in the step (1), airing or oven dry make ultra-fine microporous layers of surperficial corundum and internal layer palm fibre corundum aeration head be combined into firm double-deck finished product fully through 1000 ℃～1200 ℃ calcinings.
The preparation method of the efficient ultra-fine micro porous aeration head of a kind of bilayer comprises the steps:
(1) with the surface grinding of described brown corundum aeration head finished product;
(2) with brown corundum or the white fused alumina particle of particle diameter between 100 μ m to 200 μ m, add the carboxymethyl cellulose that is equivalent to brown corundum or white fused alumina gross weight 5%～20%, stir into muddy, use mechanically spraying to form the ultra-fine microporous layers of corundum again in the brown corundum aeration head finished surface described in the step (1), airing or oven dry make ultra-fine microporous layers of surperficial corundum and internal layer palm fibre corundum aeration head be combined into firm double-deck finished product fully through 1000 ℃～1200 ℃ calcinings.
The preparation method of the described brown corundum aeration head of step (1) is: use particle diameter at 40 to 65 purpose corundum sands, add wood chip and yellow starch gum material, make the brown corundum aeration head that wall thickness is 12mm～14mm through mechanically mixing, airing or oven dry, 1200 ℃～1400 ℃ calcinings make brown corundum aeration head finished product.
Described wood chip consumption is 3%～6% of a corundum sand gross weight, and the consumption of yellow starch gum material is 1%～3% of a corundum sand gross weight.
Described corundum aeration head is shaped as bell jar type, dome-shaped, ball-type, plate, tubular-type, watt shape or square plate shape.
Described bell jar type, dome-shaped, ball-type, plate diameter have Ф 100 to 450mm, and the circular arch radial height has 30 to 190mm, and the height of bell jar type is 30～40mm.
Described tubular shape has diameter that Ф 50mm to 120mm is arranged, long 600mm to 1200mm.
The radius of described watt of shape has 60 to 250mm.
The length and width of described side's plate shape have 150mm * 800mm to 1200mm * 2500mm.
Finished product with different shape after the efficient ultra-fine micro porous aeration head of bilayer of the present invention is made is installed on the aeration pallet that is complementary with it, and piped is loaded onto ventilation and connect mouth through the ventilation aeration.
The double-deck efficient ultra-fine micro porous aeration head of the present invention can be applicable to sewage biochemical processing device and air supporting floatation equipment.
A kind of double-deck aerator, comprise aeration head, aeration head pallet, air distribution, holding bolt, two reverse checkvalve, aeration head is connected with the aeration head pallet of the two reverse checkvalves of band, and the aeration head pallet links to each other with air distribution, and described aeration head is double-deck efficient ultra-fine micro porous aeration head.
Beneficial effect of the present invention:
As basic unit (being internal layer), the aperture is big, intensity is high, ultimate compression strength 120kg/cm with conventional brown corundum layer for the double-deck efficient ultra-fine micro porous aeration head of the present invention
3, anti-bar intensity 50kg/cm
2Good permeability, resistance is little, helps air in a large number, pass through fast, and when air arrives skin and is the ultra-fine microporous layers of corundum, because this layer aperture is fine and closely woven, be dispersed into very thin trickle bubble and enter in the water, because bubble volume is very little, therefore can the staying in water bottom of long period and can very fast rising, so the oxygen in the trickle bubble will fully be absorbed by water, to reach the purpose of quick oxygenation in water.Because bubble is extremely trickle, make the coefficient of oxygen utilization of air in water improve greatly simultaneously, the ultra-fine microporous layers of corundum is very thin in addition, has only 0.3～0.7mm thick, thus significantly reduced the resistance that air passes, thus reach the purpose of efficient energy-saving.
When the double-deck efficient ultra-fine micro porous aeration head of the present invention is used in the operating mode of air supporting flotation, aerator through aeration head of the present invention is installed discharges a large amount of trickle bubbles in sewage, particulate matter in the sewage and suspended substance are by these trickle bubble absorption, and, reach the isolating purpose of removing contamination along with bubble rises to water surface.
Description of drawings
Fig. 1, the double-deck efficient ultra-fine micro porous aeration head structure iron of a kind of bell jar type;
Wherein 1 is internal layer corundum aeration head, the ultra-fine microporous layers of 2 corundum, and Ф is a diameter, h is a height.
Fig. 2, the double-deck efficient ultra-fine micro porous aeration head structure iron of a kind of circular arch type;
Wherein 1 is internal layer palm fibre corundum aeration head, and 2 is the accurate fine holes layer of brown corundum, and Ф is a diameter, and h is a height.
Fig. 3, the double-deck aerator sectional view of double-deck efficient ultra-fine micro porous aeration head is installed;
Wherein 1 is the double-deck efficient ultra-fine micro porous aeration head of bell jar type, and 2 is the aeration head pallet, and 3 is air distribution, and 4 is holding bolt, and 5 is sealing-ring, and 6 is two reverse checkvalves.
Fig. 4, the double-deck aerator cross-sectional view of double-deck efficient ultra-fine micro porous aeration head is installed;
Wherein 1 is the double-deck efficient ultra-fine micro porous aeration head of bell jar type, and 2 is the aeration head pallet, and 3 is air distribution, and 4 is holding bolt, and 5 is sealing-ring, and 6 is two reverse checkvalves.
Embodiment
As shown in Figure 1, the efficient ultra-fine micro porous aeration head of a kind of bilayer, internal layer are conventional brown corundum aeration head 1, and it is 0.5mm that brown corundum aeration head outside surface is coated with a layer thickness, and the aperture is the ultra-fine microporous layers 2 of the corundum of 65 μ m.The wall thickness of the conventional brown corundum aeration head 1 of internal layer is 13mm, and the aperture is 180 μ m, is shaped as the bell jar type, and diameter is 200mm, highly is 38mm.
The efficient ultra-fine micro porous aeration head of this bilayer can prepare by the following method:
(1) be 50 purpose corundum sands with particle diameter, add wood chip that is equivalent to corundum sand weight 6% and the yellow starch gum material that is equivalent to corundum sand weight 3%, make the aeration head that wall thickness is 13mm through mechanically mixing, airing is after 1200 ℃ high temperature sintering becomes the aperture is the brown corundum aeration head finished product of 180 μ m, finished product burn till the back on the surface of its finished product with grinding tool with its surface grinding.
(2) with the brown corundum in granules of particle diameter at 150 μ m, add 15% the carboxymethyl cellulose be equivalent to brown corundum in granules gross weight, stir into muddy, use mechanically spraying to form the ultra-fine microporous layers of corundum again in the brown corundum aeration head finished surface described in the step (1), airing is combined into firm double-deck finished product through 1000 ℃ of calcinings fully with ultra-fine microporous layers of the brown corundum in surface and internal layer palm fibre corundum aeration head.
As shown in Figure 2, the efficient ultra-fine micro porous aeration head of a kind of bilayer, internal layer are conventional brown corundum aeration head 1, and it is 0.3mm that brown corundum aeration head outside surface is coated with a layer thickness, and the aperture is the accurate fine holes layer 2 of the brown corundum of 56 μ m.The wall thickness of the conventional brown corundum aeration head 1 of internal layer is 12mm, and the aperture is 150 μ m, is shaped as the circular arch type, and diameter is 300mm, and the circular arch radial height is 100mm.
The efficient ultra-fine micro porous aeration head of this bilayer can prepare by the following method:
(1) be 45 purpose corundum sands with particle diameter, add wood chip that is equivalent to corundum sand weight 3% and the yellow starch gum material that is equivalent to corundum sand weight 1%, make the aeration head that wall thickness is 12mm through mechanically mixing, airing is after 1400 ℃ high temperature sintering becomes the aperture is the brown corundum aeration head finished product of 150 μ m, finished product burn till the back on the surface of its finished product with grinding tool with its surface grinding.
(2) with the brown corundum in granules of particle diameter at 100 μ m, add 5% the carboxymethyl cellulose be equivalent to brown corundum in granules gross weight, stir into muddy, use mechanically spraying to form the accurate fine holes layer of brown corundum again in the brown corundum aeration head finished surface described in the step (1), airing is combined into firm double-deck finished product through 1200 ℃ of calcinings fully with brown corundum coating in surface and internal layer palm fibre corundum aeration head.
Embodiment 3
As shown in Figure 1, the efficient ultra-fine micro porous aeration head of a kind of bilayer, internal layer are conventional brown corundum aeration head 1, and it is 0.7mm that brown corundum aeration head outside surface is coated with a layer thickness, and the aperture is the accurate fine holes layer 2 of the white fused alumina of 80 μ m.The wall thickness of the conventional brown corundum aeration head 1 of internal layer is 14mm, and the aperture is 250 μ m, is shaped as the bell jar type, and diameter is 200mm, and thickness is 40.
The efficient ultra-fine micro porous aeration head of this bilayer can prepare by the following method:
(1) be 65 purpose corundum sands with particle diameter, add wood chip that is equivalent to corundum sand weight 5% and the yellow starch gum material that is equivalent to corundum sand weight 2%, make the aeration head that wall thickness is 14mm through mechanically mixing, airing is after 1300 ℃ high temperature sintering becomes the aperture is the brown corundum aeration head finished product of 250 μ m, finished product burn till the back on the surface of its finished product with grinding tool with its surface grinding.
(2) with the white fused alumina particle of particle diameter at 200 μ m, add 20% the carboxymethyl cellulose be equivalent to brown corundum in granules gross weight, stir into muddy, use mechanically spraying to form the accurate fine holes layer of white fused alumina again in the brown corundum aeration head finished surface described in the step (1), airing is combined into firm double-deck finished product through 1200 ℃ of calcinings fully with surperficial white fused alumina coating and internal layer palm fibre corundum aeration head.
Embodiment 4
As shown in Figure 3 and Figure 4, a kind of double-deck aerator, the double-deck efficient ultra-fine micro porous aeration head 1 of bell jar type that comprises embodiment 1 preparation, aeration head pallet 2, air distribution 3, holding bolt 4, sealing-ring 5, two reverse checkvalves 6, the efficient ultra-fine micro porous aeration head 1 of bell jar type bilayer is tightly connected by the aeration head pallet 2 of sealing-ring 5 with the two reverse checkvalves 6 of band, and fixes by holding bolt 4, sealing-ring 5, aeration head pallet 2 links to each other with air distribution 3, and air distribution 3 links to each other with base by clip.
Double-deck aerator working order is described: double-deck aerator is installed on bottom the sewage lagoon that needs to handle, with gas blower or air compressor air is sent in the double-deck aerator by pipeline, the internal layer that air enters aeration head very soon tentatively disperses, and enters the ultra-fine microporous layers of corundum (skin) then and further is dispersed into the fine holes bubble.The diameter of these trickle bubbles has only 0.05～0.5mm, these bubbles almost nebulize soluble in water, airborne oxygen is fully absorbed by water, the dissolved oxygen degree of depth in the water is improved greatly, enable to degrade the microorganism raised growth of oxious component and breeding and reach the efficient that improves sewage disposal, and the amount of cutting down the consumption of energy greatly.
Coefficient of oxygen utilization when at present existing various aerators are worked is 16～35%, every kilowatt oxygenation capacity is 1.6～3.6kg, and the utilization ratio of oxygen will reach 50～55% during the aeration that air carries out work by double-deck minute aperture aerator of the present invention, every kilowatt-hour oxygenation capacity will reach 5.77kg, improve 60%.The aerator of amount of energy saving and original technology is than energy-conservation 60%.
The present invention does not describe part in detail, is the state of the art.
Embodiment recited above is described preferred implementation of the present invention; be not that design of the present invention and scope are limited; do not breaking away under the design concept prerequisite of the present invention; various modification and improvement that those skilled in the art make technical scheme of the present invention; all should fall into protection scope of the present invention, the technology contents that the present invention asks for protection all is documented in claims.
Claims (10)
1. efficient ultra-fine micro porous aeration head of bilayer, it is characterized in that comprising that the aperture is that the conventional brown corundum aeration head of internal layer of 150～250 μ m and the thickness of coating described internal layer palm fibre corundum aeration head outside surface are 0.3～0.7mm, the aperture is the ultra-fine microporous layers of the corundum of 56～80 μ m.
2. the efficient ultra-fine micro porous aeration head of bilayer according to claim 1 is characterized in that the wall thickness of the conventional brown corundum aeration head of described internal layer is 12mm to 14mm, is shaped as bell jar type, dome-shaped, ball-type, plate, tubular-type, watt shape or square plate shape.
3. the efficient ultra-fine micro porous aeration head of bilayer according to claim 1, the particle diameter that it is characterized in that corundum in granules in the ultra-fine microporous layers of described corundum are 100 μ m to 200 μ m.
4. the efficient ultra-fine micro porous aeration head of bilayer according to claim 1 is characterized in that the corundum in the ultra-fine microporous layers of described corundum is brown corundum or white fused alumina.
5. the efficient ultra-fine micro porous aeration head of bilayer according to claim 1 is characterized in that the efficient ultra-fine micro porous aeration head of described bilayer can prepare by the following method:
(1) with the surface grinding of described brown corundum aeration head finished product;
(2) with brown corundum or the white fused alumina particle of particle diameter between 100 μ m to 200 μ m, add the carboxymethyl cellulose that is equivalent to brown corundum or white fused alumina gross weight 5%～20%, stir into muddy, use mechanically spraying to form the ultra-fine microporous layers of corundum again in the brown corundum aeration head finished surface described in the step (1), airing or oven dry make ultra-fine microporous layers of surperficial corundum and internal layer palm fibre corundum aeration head be combined into firm double-deck finished product fully through 1000 ℃～1200 ℃ calcinings.
6. the preparation method of the efficient ultra-fine micro porous aeration head of the described bilayer of claim 1 is characterized in that comprising the steps:
(1) with the surface grinding of described brown corundum aeration head finished product;
(2) with brown corundum or the white fused alumina particle of particle diameter between 100 μ m to 200 μ m, add the carboxymethyl cellulose that is equivalent to brown corundum or white fused alumina gross weight 5%～20%, stir into muddy, use mechanically spraying to form the ultra-fine microporous layers of corundum again in the brown corundum aeration head finished surface described in the step (1), airing or oven dry make ultra-fine microporous layers of surperficial corundum and internal layer palm fibre corundum aeration head be combined into firm double-deck finished product fully through 1000 ℃～1200 ℃ calcinings.
7. the preparation method of the efficient ultra-fine micro porous aeration head of bilayer according to claim 6, the preparation method who it is characterized in that the described brown corundum aeration head of step (1) is: use particle diameter at 40 to 65 purpose corundum sands, add wood chip and yellow starch gum material, make the brown corundum aeration head that wall thickness is 12mm～14mm through mechanically mixing, airing or oven dry, 1200 ℃～1400 ℃ calcinings make brown corundum aeration head finished product.
8. the preparation method of the efficient ultra-fine micro porous aeration head of bilayer according to claim 6 is characterized in that described wood chip consumption is 3%～6% of a corundum sand gross weight, and the consumption of yellow starch gum material is 1%～3% of a corundum sand gross weight.
9. the preparation method of the efficient ultra-fine micro porous aeration head of bilayer according to claim 7 is characterized in that described corundum aeration head is shaped as bell jar type, dome-shaped, ball-type, plate, tubular-type, watt shape or square plate shape.
10. double-deck aerator, comprise aeration head, aeration head pallet, air distribution, two reverse checkvalve, aeration head is connected with the aeration head pallet of the two reverse checkvalves of band, the aeration head pallet links to each other with air distribution, it is characterized in that described aeration head is the efficient ultra-fine micro porous aeration head of the described bilayer of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100575240A CN102211808B (en) | 2011-03-10 | 2011-03-10 | Double-layer high-efficiency superfine-micropore aeration header |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100575240A CN102211808B (en) | 2011-03-10 | 2011-03-10 | Double-layer high-efficiency superfine-micropore aeration header |
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| Publication Number | Publication Date |
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| CN102211808A true CN102211808A (en) | 2011-10-12 |
| CN102211808B CN102211808B (en) | 2012-07-18 |
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| CN2011100575240A Expired - Fee Related CN102211808B (en) | 2011-03-10 | 2011-03-10 | Double-layer high-efficiency superfine-micropore aeration header |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815783A (en) * | 2012-08-27 | 2012-12-12 | 江苏溢洋水工业有限公司 | Energy-saving microporous aerator and preparation method thereof |
| CN105000658A (en) * | 2015-09-01 | 2015-10-28 | 卢润湖 | Manufacturing method of ultramicropore aerator for sewage treatment |
| CN113816762A (en) * | 2021-10-19 | 2021-12-21 | 安徽六顺创业特种环保股份有限公司 | Production process of corundum aerator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4622139A (en) * | 1985-03-20 | 1986-11-11 | Brown Charles J | Aerator device |
| CN2890041Y (en) * | 2006-04-17 | 2007-04-18 | 彭建萍 | Profiled quartz microporous aerator |
| CN201634513U (en) * | 2010-02-04 | 2010-11-17 | 山东大学 | Aeration device for sewage processing system |
| CN201746379U (en) * | 2010-06-02 | 2011-02-16 | 江苏荆溪环保设备有限公司 | Ceramic plate type micropore aerator |
| CN202046925U (en) * | 2011-03-10 | 2011-11-23 | 宜兴市溢洋水工业有限公司 | Double-layer high-efficiency ultrafine micropore aeration head and double-layer aerator comprising same |
-
2011
- 2011-03-10 CN CN2011100575240A patent/CN102211808B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4622139A (en) * | 1985-03-20 | 1986-11-11 | Brown Charles J | Aerator device |
| CN2890041Y (en) * | 2006-04-17 | 2007-04-18 | 彭建萍 | Profiled quartz microporous aerator |
| CN201634513U (en) * | 2010-02-04 | 2010-11-17 | 山东大学 | Aeration device for sewage processing system |
| CN201746379U (en) * | 2010-06-02 | 2011-02-16 | 江苏荆溪环保设备有限公司 | Ceramic plate type micropore aerator |
| CN202046925U (en) * | 2011-03-10 | 2011-11-23 | 宜兴市溢洋水工业有限公司 | Double-layer high-efficiency ultrafine micropore aeration head and double-layer aerator comprising same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815783A (en) * | 2012-08-27 | 2012-12-12 | 江苏溢洋水工业有限公司 | Energy-saving microporous aerator and preparation method thereof |
| CN105000658A (en) * | 2015-09-01 | 2015-10-28 | 卢润湖 | Manufacturing method of ultramicropore aerator for sewage treatment |
| CN113816762A (en) * | 2021-10-19 | 2021-12-21 | 安徽六顺创业特种环保股份有限公司 | Production process of corundum aerator |
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|---|---|
| CN102211808B (en) | 2012-07-18 |
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Address after: 214201, Wuxi, Jiangsu province Yixing Yicheng talk home dry 115 Applicant after: Jiangsu YiYang Water Industry Co., Ltd. Address before: 214201, Wuxi, Jiangsu province Yixing Yicheng talk home dry 115 Applicant before: Yixing Yiyang Water Industrial Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: YIYANG WATER INDUSTRY CO., LTD., YIXING CITY TO: JIANGSU YIYANG WATER INDUSTRY CO., LTD. |
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Granted publication date: 20120718 Termination date: 20180310 |