CN103288246A - Device for improving calcium and magnesium ion removal capability of high-precision membrane - Google Patents
Device for improving calcium and magnesium ion removal capability of high-precision membrane Download PDFInfo
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- CN103288246A CN103288246A CN2013102648796A CN201310264879A CN103288246A CN 103288246 A CN103288246 A CN 103288246A CN 2013102648796 A CN2013102648796 A CN 2013102648796A CN 201310264879 A CN201310264879 A CN 201310264879A CN 103288246 A CN103288246 A CN 103288246A
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- outlet
- import
- film
- communicated
- high precision
- Prior art date
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- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910001424 calcium ion Inorganic materials 0.000 title claims abstract description 52
- 229910001425 magnesium ion Inorganic materials 0.000 title claims abstract description 52
- 239000012528 membrane Substances 0.000 title claims abstract description 28
- 239000011575 calcium Substances 0.000 title abstract description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 150000001875 compounds Chemical class 0.000 claims abstract description 23
- 230000008676 import Effects 0.000 claims description 56
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 47
- 238000013268 sustained release Methods 0.000 claims description 25
- 239000012730 sustained-release form Substances 0.000 claims description 25
- 238000001914 filtration Methods 0.000 claims description 13
- 229910019142 PO4 Inorganic materials 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 7
- 239000010452 phosphate Substances 0.000 claims description 7
- 239000006004 Quartz sand Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000012510 hollow fiber Substances 0.000 claims description 6
- 238000001728 nano-filtration Methods 0.000 claims description 6
- 238000001223 reverse osmosis Methods 0.000 claims description 6
- 238000000108 ultra-filtration Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 239000003405 delayed action preparation Substances 0.000 abstract 3
- 239000007787 solid Substances 0.000 abstract 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000011734 sodium Substances 0.000 description 17
- 239000011777 magnesium Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a device for improving the calcium and magnesium ion removal capability of a high-precision membrane. The device comprises a preprocessor, a membrane processor, a first throttle valve and a solid sustained-release preparation, wherein an inlet of the preprocessor is communicated with a water source pipe, an outlet of the preprocessor is communicated with an inlet of the membrane processor, the high-precision membrane is arranged in the membrane processor, an inlet, an outlet and a discharge outlet are formed in the membrane processor, the discharge outlet of the membrane processor is communicated with an inlet of the first throttle valve, an outlet of the first throttle valve is emptied, and the solid sustained-release preparation is arranged in the preprocessor and comprises a compound which can form a complex with calcium and magnesium ions in water after being dissolved in the water. After reacting with water, the solid sustained-release preparation can be used for drastically reducing the concentration of the calcium and magnesium ions in the water, and the tendency of scaling on the surface of the membrane is alleviated simultaneously when the content of the calcium and magnesium ions is reduced, so that the blocking of the high-precision membrane can be prevented, and the using cost can be effectively reduced.
Description
Technical field
The present invention relates to a kind of device that the high precision film is removed the calcium ions and magnesium ions ability that improves
Background technology
In the known membrane filtration technique, in order to improve the ability of removing calcium ions and magnesium ions in the water, common way is to adopt the method for the filtering accuracy that improves mould material to realize.Filtering accuracy is more high, and just the aperture of filtering material is more little, and the pollutent size that then can hold back is just more little, and calcium ions and magnesium ions is removed just more thoroughly.That is to say that in known filtering technique, the ability of removing calcium ions and magnesium ions in the water depends on the precision of filtering material fully.But, because the easy fouling of calcium ions and magnesium ions, so the precision of film is more high, more easy obstruction.So the work-ing life of the high precision film of known technology is lower, and use cost is higher.
Summary of the invention
The objective of the invention is to improve a kind of device that the high precision film is removed the calcium ions and magnesium ions ability that improves, can prevent or delay the high precision film and stop up, reduce use cost.
The first kind of technical scheme that realizes the object of the invention is: improve the device that the high precision film is removed the calcium ions and magnesium ions ability, comprise pretreater, film treater, first throttle valve and solid-state sustained release dosage; The import of described pretreater is communicated with water source tube, and the outlet of pretreater is communicated with the import of film treater; Be provided with the high precision film in the described film treater, and which is provided with import, outlet and discharge outlet; The discharge outlet of described film treater is communicated with the import of first throttle valve, the outlet emptying of first throttle valve; Described solid-state sustained release dosage is arranged in the pretreater; Described solid-state sustained release dosage comprises the compound that can form complex compound after being dissolved in the water with calcium ions and magnesium ions in the water.
Compound in the described solid-state sustained release dosage is inorganic polymeric phosphate.
Improve the high precision film and remove the device of calcium ions and magnesium ions ability, also comprise by-pass valve; The import of described by-pass valve and outlet are communicated with import and the outlet of first throttle valve respectively.
Improve the high precision film and remove the device of calcium ions and magnesium ions ability, also comprise water pump, return line and second throttling valve; The import of described return line directly is communicated with the discharge outlet of film treater, and the outlet of return line is communicated on the suction culvert of film treater; Described second throttling valve is arranged on the return line; The outlet of described water pump is communicated with the import of film treater, and the import of water pump is communicated with the suction culvert of film treater.
Also be provided with gac and/or fiber filtering (for example PP cotton) and/or micropore ceramics and/or hollow fiber ultrafiltration membrane and/or quartz sand and/or silk screen in the described pretreater.
Improve the high precision film and remove the device of calcium ions and magnesium ions ability, also comprise strainer; The outlet of described pretreater is communicated with the import of strainer, and the outlet of strainer is communicated with the import of film treater.
High precision film in the described film treater is nanofiltration membrane or reverse osmosis membrane.
The second kind of technical scheme that realizes the object of the invention is: improve the device that the high precision film is removed the calcium ions and magnesium ions ability, comprise pretreater, film treater, first throttle valve, solid-state sustained release dosage, water pump, return line and second throttling valve; Be provided with the high precision film in the described film treater, and which is provided with import, outlet and discharge outlet; The import of described film treater is communicated with water source tube by suction culvert; Described solid-state sustained release dosage is arranged in the pretreater; Described solid-state sustained release dosage comprises the compound that can form complex compound after being dissolved in the water with calcium ions and magnesium ions in the water; The import of described return line directly is communicated with the discharge outlet of film treater, and the outlet of return line is communicated on the suction culvert of film treater; Described second throttling valve is arranged on the return line; The part suction culvert of described return line, film treater and film treater are formed the circulation loop of sealing; Described pretreater is arranged on this circulation loop, and the import of first throttle valve is communicated on this circulation loop, the outlet emptying of first throttle valve; Described water pump is arranged on the circulation loop between the import of the outlet of second throttling valve and film treater.
Compound in the described solid-state sustained release dosage is inorganic polymeric phosphate.
Improve the high precision film and remove the device of calcium ions and magnesium ions ability, also comprise by-pass valve; The import of described by-pass valve and outlet are communicated with import and the outlet of first throttle valve respectively.
Also be provided with gac and/or fiber filtering (for example PP cotton) and/or micropore ceramics and/or hollow fiber ultrafiltration membrane and/or quartz sand and/or silk screen in the described pretreater.
Improve the high precision film and remove the device of calcium ions and magnesium ions ability, also comprise strainer; Described strainer is arranged on the circulation loop between the import of the outlet of pretreater and film treater.
High precision film in the described film treater is nanofiltration membrane or reverse osmosis membrane.
The present invention has positive effect: solid-state sustained release dosage of the present invention comprises the compound that can form complex compound after being dissolved in the water with calcium ions and magnesium ions in the water, because of complexing the complex compound size of calcium ion, magnesium ion significantly greater than single calcium ion, the size of magnesium ion, so even the filtering accuracy of high precision film decreases, complex compound also is difficult to pass the high precision film, and the high precision film that decreases for filtering accuracy can guarantee that still its ability of removing calcium ions and magnesium ions in the water can not descend in other words; In addition, through the water after the complex reaction, calcium ions and magnesium ions concentration can descend significantly, and calcium ions and magnesium ions content has reduced the tendency of film surface scale when reducing, and can prevent that therefore the high precision film from stopping up, and effectively reduces use cost.
Description of drawings
Content of the present invention is easier to be expressly understood in order to make, and according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein below
Fig. 1 is the structural representation of embodiments of the invention 1.
Fig. 2 is the structural representation of embodiments of the invention 2.
Fig. 3 is the structural representation of embodiments of the invention 3.
Label is in the accompanying drawing:
Embodiment
(embodiment 1)
See Fig. 1, the raising high precision film of present embodiment is removed the device of calcium ions and magnesium ions ability, comprises pretreater 1, film treater 2, first throttle valve 3, solid-state sustained release dosage 4, by-pass valve 5 and strainer 9.
The import of pretreater 1 is communicated with water source tube, and the outlet of pretreater 1 is communicated with the import of strainer 9, and the outlet of strainer 9 is communicated with the import of film treater 2.Be provided with the high precision film in the film treater 2, and which is provided with import, outlet and discharge outlet.The discharge outlet of film treater 2 is communicated with the import of first throttle valve 3, the outlet emptying of first throttle valve 3.Solid-state sustained release dosage 4 is arranged in the pretreater 1.Solid-state sustained release dosage 4 comprises the compound that can form complex compound after being dissolved in the water with calcium ions and magnesium ions in the water, the preferred inorganic polymeric phosphate of this compound.The import of by-pass valve 5 and outlet are communicated with import and the outlet of first throttle valve 3 respectively.
Also be provided with gac and/or fiber filtering (for example PP cotton) and/or micropore ceramics and/or hollow fiber ultrafiltration membrane and/or quartz sand and/or silk screen in the pretreater 1.High precision film in the film treater 2 is nanofiltration membrane or reverse osmosis membrane.
The mechanism that the raising high precision film of present embodiment is removed the device of calcium ions and magnesium ions ability is: after solid-state sustained release dosage 4 is immersed in the water, polymeric phosphate wherein can be dissolved in the water lentamente, calcium, the magnesium plasma reaction of itself and water small-medium size, form large-sized soluble complexes, reaction equation is as follows:
Na
2〔Na
4（PO
3）
6〕
+ Ca
2+ → Na
2〔Na
2Ca（PO
3）
6〕+ 2Na
+ ；
Na
2〔Na
2Ca（PO
3）
6〕+ Ca
2+ → Na
2〔Ca
2（PO
3）
6〕+ 2Na
+ ；
Na
2〔Na
4（PO
3）
6〕 + Mg
2+ → Na
2〔Na
2Mg（PO
3）
6〕+ 2Na+ ；
Na
2〔Na
2Ca（PO
3）
6〕+ Mg
2+ → Na
2〔CaMg（PO
3）
6〕+ 2Na+ 。
Because Na
2Na
2(Ca(PO
3)
6), Na
2(Ca
2(PO
3)
6) size that waits is obviously than Ca
2+, Mg
2+Size much bigger, so, even the filtering accuracy of high precision film decreases, can guarantee that also the ability of removing calcium ions and magnesium ions in the water can not descend.
In addition, the water after above-mentioned complex reaction, calcium ions and magnesium ions concentration has obviously descended significantly, and the content of sodium ion has significantly increased.Because sodium ion is non flouling behaviour, having reduced calcium ions and magnesium ions content is exactly the tendency that has reduced the film surface scale, can prevent that therefore the high precision film from stopping up, and effectively reduces use cost.
(embodiment 2)
See Fig. 2, present embodiment is substantially the same manner as Example 1, and difference is: also comprise water pump 6, return line 7 and second throttling valve 8.
The import of return line 7 directly is communicated with the discharge outlet of film treater 2, and the outlet of return line 7 is communicated on the suction culvert of film treater 2.Second throttling valve 8 is arranged on the return line 7.The outlet of water pump 6 is communicated with the import of film treater 2, and the import of water pump 6 is communicated with the suction culvert of film treater 2.
The mechanism of the device of the raising high precision film removal calcium ions and magnesium ions ability of present embodiment is identical with embodiment 1.
(embodiment 3)
See Fig. 3, the raising high precision film of present embodiment is removed the device of calcium ions and magnesium ions ability, comprises pretreater 1, film treater 2, first throttle valve 3, solid-state sustained release dosage 4, by-pass valve 5, water pump 6, return line 7, second throttling valve 8 and strainer 9.
Be provided with the high precision film in the film treater 2, and which is provided with import, outlet and discharge outlet.The import of film treater 2 is communicated with water source tube by suction culvert.Solid-state sustained release dosage 4 is arranged in the pretreater 1.Solid-state sustained release dosage 4 comprises the compound that can form complex compound after being dissolved in the water with calcium ions and magnesium ions in the water, the preferred inorganic polymeric phosphate of this compound.The import of return line 7 directly is communicated with the discharge outlet of film treater 2, and the outlet of return line 7 is communicated on the suction culvert of film treater 2.Second throttling valve 8 is arranged on the return line 7.The part suction culvert of return line 7, film treater 2 and film treater 2 are formed the circulation loop of sealing.Pretreater 1 is arranged on this circulation loop, and the import of first throttle valve 3 is communicated on this circulation loop, the outlet emptying of first throttle valve 3.The import of by-pass valve 5 and outlet are communicated with import and the outlet of first throttle valve 3 respectively.Water pump 6 is arranged on the circulation loop between the import of the outlet of second throttling valve 8 and film treater 2.Strainer 9 is arranged on the circulation loop between the import of the outlet of pretreater 1 and film treater 2.
Also be provided with gac and/or fiber filtering (for example PP cotton) and/or micropore ceramics and/or hollow fiber ultrafiltration membrane and/or quartz sand and/or silk screen in the pretreater 1.High precision film in the film treater 2 is nanofiltration membrane or reverse osmosis membrane.
The mechanism of the device of the raising high precision film removal calcium ions and magnesium ions ability of present embodiment is identical with embodiment 1.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. improve the device that the high precision film is removed the calcium ions and magnesium ions ability, it is characterized in that: comprise pretreater (1), film treater (2), first throttle valve (3) and solid-state sustained release dosage (4); The import of described pretreater (1) is communicated with water source tube, and the outlet of pretreater (1) is communicated with the import of film treater (2); Be provided with the high precision film in the described film treater (2), and which is provided with import, outlet and discharge outlet; The discharge outlet of described film treater (2) is communicated with the import of first throttle valve (3), the outlet emptying of first throttle valve (3); Described solid-state sustained release dosage (4) is arranged in the pretreater (1); Described solid-state sustained release dosage (4) comprises the compound that can form complex compound after being dissolved in the water with calcium ions and magnesium ions in the water.
2. raising high precision film according to claim 1 is removed the device of calcium ions and magnesium ions ability, and it is characterized in that: the compound in the described solid-state sustained release dosage (4) is inorganic polymeric phosphate.
3. raising high precision film according to claim 1 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: also comprise by-pass valve (5); The import of described by-pass valve (5) and outlet are communicated with import and the outlet of first throttle valve (3) respectively.
4. raising high precision film according to claim 1 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: also comprise water pump (6), return line (7) and second throttling valve (8); The import of described return line (7) directly is communicated with the discharge outlet of film treater (2), and the outlet of return line (7) is communicated on the suction culvert of film treater (2); Described second throttling valve (8) is arranged on the return line (7); The outlet of described water pump (6) is communicated with the import of film treater (2), and the import of water pump (6) is communicated with the suction culvert of film treater (2).
5. raising high precision film according to claim 1 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: also be provided with gac and/or fiber filtering and/or micropore ceramics and/or hollow fiber ultrafiltration membrane and/or quartz sand and/or silk screen in the described pretreater (1).
6. raising high precision film according to claim 1 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: also comprise strainer (9); The outlet of described pretreater (1) is communicated with the import of strainer (9), and the outlet of strainer (9) is communicated with the import of film treater (2).
7. raising high precision film according to claim 1 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: the high precision film in the described film treater (2) is nanofiltration membrane or reverse osmosis membrane.
8. improve the device that the high precision film is removed the calcium ions and magnesium ions ability, it is characterized in that: comprise pretreater (1), film treater (2), first throttle valve (3), solid-state sustained release dosage (4), water pump (6), return line (7) and second throttling valve (8); Be provided with the high precision film in the described film treater (2), and which is provided with import, outlet and discharge outlet; The import of described film treater (2) is communicated with water source tube by suction culvert; Described solid-state sustained release dosage (4) is arranged in the pretreater (1); Described solid-state sustained release dosage (4) comprises the compound that can form complex compound after being dissolved in the water with calcium ions and magnesium ions in the water; The import of described return line (7) directly is communicated with the discharge outlet of film treater (2), and the outlet of return line (7) is communicated on the suction culvert of film treater (2); Described second throttling valve (8) is arranged on the return line (7); The part suction culvert of described return line (7), film treater (2) and film treater (2) are formed the circulation loop of sealing; Described pretreater (1) is arranged on this circulation loop, and the import of first throttle valve (3) is communicated on this circulation loop, the outlet emptying of first throttle valve (3); Described water pump (6) is arranged on the circulation loop between the import of the outlet of second throttling valve (8) and film treater (2).
9. raising high precision film according to claim 8 is removed the device of calcium ions and magnesium ions ability, and it is characterized in that: the compound in the described solid-state sustained release dosage (4) is inorganic polymeric phosphate.
10. raising high precision film according to claim 8 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: also comprise by-pass valve (5); The import of described by-pass valve (5) and outlet are communicated with import and the outlet of first throttle valve (3) respectively.
11. raising high precision film according to claim 8 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: also be provided with gac and/or PP cotton and/or micropore ceramics and/or hollow fiber ultrafiltration membrane and/or quartz sand and/or silk screen in the described pretreater (1).
12. raising high precision film according to claim 8 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: also comprise strainer (9); Described strainer (9) is arranged on the circulation loop between the import of the outlet of pretreater (1) and film treater (2).
13. raising high precision film according to claim 8 is removed the device of calcium ions and magnesium ions ability, it is characterized in that: the high precision film in the described film treater (2) is nanofiltration membrane or reverse osmosis membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102648796A CN103288246A (en) | 2013-06-27 | 2013-06-27 | Device for improving calcium and magnesium ion removal capability of high-precision membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102648796A CN103288246A (en) | 2013-06-27 | 2013-06-27 | Device for improving calcium and magnesium ion removal capability of high-precision membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103288246A true CN103288246A (en) | 2013-09-11 |
Family
ID=49089860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102648796A Pending CN103288246A (en) | 2013-06-27 | 2013-06-27 | Device for improving calcium and magnesium ion removal capability of high-precision membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103288246A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964556A (en) * | 2014-04-30 | 2014-08-06 | 内蒙古包钢稀土(集团)高科技股份有限公司 | Method for separating calcium ions and magnesium ions from ammonium sulfate wastewater |
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| CN201914988U (en) * | 2010-12-30 | 2011-08-03 | 杭州炬星环保科技有限公司 | Anti-pollution softening pole of filter membrane of direct drinking water dispenser |
| CN201959724U (en) * | 2010-01-27 | 2011-09-07 | 杜弘道 | Water-saving reverse osmosis water purifier for highly hard water |
| CN202322442U (en) * | 2011-11-22 | 2012-07-11 | 江苏正本净化节水科技实业有限公司 | Micro waste water reverse osmosis water purifier |
| CN102701478A (en) * | 2012-05-30 | 2012-10-03 | 河北工业大学 | Concentrated seawater treatment method |
-
2013
- 2013-06-27 CN CN2013102648796A patent/CN103288246A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6056878A (en) * | 1998-08-03 | 2000-05-02 | E-Cell Corporation | Method and apparatus for reducing scaling in electrodeionization systems and for improving efficiency thereof |
| CN201959724U (en) * | 2010-01-27 | 2011-09-07 | 杜弘道 | Water-saving reverse osmosis water purifier for highly hard water |
| CN201914988U (en) * | 2010-12-30 | 2011-08-03 | 杭州炬星环保科技有限公司 | Anti-pollution softening pole of filter membrane of direct drinking water dispenser |
| CN202322442U (en) * | 2011-11-22 | 2012-07-11 | 江苏正本净化节水科技实业有限公司 | Micro waste water reverse osmosis water purifier |
| CN102701478A (en) * | 2012-05-30 | 2012-10-03 | 河北工业大学 | Concentrated seawater treatment method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964556A (en) * | 2014-04-30 | 2014-08-06 | 内蒙古包钢稀土(集团)高科技股份有限公司 | Method for separating calcium ions and magnesium ions from ammonium sulfate wastewater |
| CN103964556B (en) * | 2014-04-30 | 2016-06-29 | 内蒙古包钢稀土(集团)高科技股份有限公司 | A kind of separate the method for calcium, magnesium ion in ammonium sulfate waste water |
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Application publication date: 20130911 |