CN201309845Y - Membrane processing system for groundwater with excess iron and manganese ions - Google Patents
Membrane processing system for groundwater with excess iron and manganese ions Download PDFInfo
- Publication number
- CN201309845Y CN201309845Y CNU2008201238498U CN200820123849U CN201309845Y CN 201309845 Y CN201309845 Y CN 201309845Y CN U2008201238498 U CNU2008201238498 U CN U2008201238498U CN 200820123849 U CN200820123849 U CN 200820123849U CN 201309845 Y CN201309845 Y CN 201309845Y
- Authority
- CN
- China
- Prior art keywords
- processing system
- aeration tank
- water
- phreatic
- membrane module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 60
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract description 36
- 229910052742 iron Inorganic materials 0.000 title abstract description 19
- 239000003673 groundwater Substances 0.000 title abstract description 8
- 229910001437 manganese ion Inorganic materials 0.000 title abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000005273 aeration Methods 0.000 claims abstract description 48
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 5
- -1 iron ions Chemical class 0.000 abstract description 21
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052748 manganese Inorganic materials 0.000 abstract description 10
- 239000011572 manganese Substances 0.000 abstract description 10
- 239000003651 drinking water Substances 0.000 abstract description 7
- 235000020188 drinking water Nutrition 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 11
- 150000002500 ions Chemical class 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 238000000108 ultra-filtration Methods 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000010802 sludge Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 241000589651 Zoogloea Species 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920011532 unplasticized polyvinyl chloride Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a membrane processing system for groundwater with excess iron and manganese ions, which is characterized by comprising an aeration tank and a membrane module, wherein the membrane module is arranged in the aeration tank, and an inner chamber of the membrane module is communicated with a suction pump outside the aeration tank through a water outlet pipeline. The excess of iron and manganese ions means that the content of iron ions, or manganese ions, or both iron and manganese ions does not conform to the index of a sanitary standard for drinking water GB5749-2006. The groundwater processed by the membrane processing system has stable water quality higher than each index of the sanitary standard for drinking water GB5749-2006, and the membrane processing system is suitable for areas where the groundwater has high iron and manganese content as well as water processing and recycling areas, and is worthy of popularization and application.
Description
Technical field
The utility model relates to groundwater treatment, particularly a kind of ferromanganese ion phreatic film processing system that exceeds standard that is used for, described ferromanganese ion exceed standard and are meant and contain iron ion or contain mn ion or both all do not meet the index of " drinking water sanitary standard " GB5749-2006.
Background technology
Iron content, manganese underground water filter through prolonged permeation in the stratum, contain suspended substance hardly, also do not contain dissolved oxygen, and general water quality is as clear as crystal.After iron content, manganese underground water were pumped and rise to ground, airborne oxygen just was dissolved in the water rapidly, and the low price iron in the water, mn ion is because react with oxygen and generate high valence ion, made water turbidity or rubescent.
In underground water deferrization and demanganization, general technology is selected two step method for use: the first step is to former dissolved oxygen in water, and iron, mn ion are oxidized to almost water-fast high valence ion at a low price; Second step was to remove by filter high valence state ionic throw out, and water is purified.
What the technology of deferrization and demanganization commonly used was taked is the method for preaeration+manganese ore or quartz sand filtration.The effect of aeration is the compound that the ferrous iron of dissolved state or bivalent manganese is oxidized to undissolved ferric iron or tetravalence manganese.The filtering principle of sand is the particulate matter in the space filtration trap water of utilizing between the sand grains, and the ferromanganese ion compound is held back to filter and removed at high price.But it is complicated that the filtering drawback of natural filtering material is an operation, need regular just washing to be adsorbed on colloid on the sandstone filtrate with removing with back flushing, to recover filtration capacity, and washing length is long, the flushing frequency is short, also need regularly replace the ore that can lose efficacy, floor space is big, and the manual work content is more.When water quality and quantity changed, water outlet also can't guarantee up to standard.The traditional filtering technology can meet the sanitary water standard because of not holding back bacterium and virus after the filtration water outlet need be sterilized.
The content that the utility model relates to is fine to have solved an above difficult problem, when ultrafiltrationmembrane process was realized automatic operating, aeration phase and filtration stage carried out simultaneously, to realizing holding back greater than the material of membrane pore size, not only can the trapped particles material, colloidalmaterial, can also effectively catching bacterium and virus.Stable effluent quality, modularized equipment, floor space is little, the diaphragm long service life.
The utility model content
The utility model is at defective that exists in the prior art or deficiency, a kind of ferromanganese ion phreatic film processing system that exceeds standard that is used for is provided, and described ferromanganese ion exceeds standard and is meant and contains iron ion or contain mn ion or both all do not meet the index of " drinking water sanitary standard " GB5749-2006.Adopt this system, the quality of groundwater after the processing is stable, is higher than every index of " drinking water sanitary standard " GB5749-2006, is applicable to each department underground water iron, the area that manganese content is high, and the water handling reclamation area, is worthy of popularization.
The total technical conceive of the utility model is in aeration aerating in reaction tank (aeration tank), to utilize membrane module to filter, thereby effectively remove the ferromanganese ion in the underground water.
The technical solution of the utility model is as follows:
Be used for the ferromanganese ion phreatic film processing system that exceeds standard, it is characterized in that: comprise aeration tank and membrane module, described membrane module is arranged in the aeration tank, and the inner chamber of described membrane module is communicated with the suction pump that is positioned at outside the aeration tank by outlet pipeline.
Described outlet pipeline is provided with the negative pressure tensimeter.
The pond body of described aeration tank is provided with floating ball lever meter.
The space is communicated with the underground water lift pump by suction culvert in the pond of described aeration tank.
Be connected with the mud discharging pump at the bottom of the pond of described aeration tank.
The structure that the aerating apparatus of described aeration tank adopts the external gas blower in pond to be connected with spatial aeration tube in the pond.
The aperture of film is between 0.01～1 μ m in the described membrane module.
Technique effect of the present utility model is as follows:
The ferromanganese ion phreatic film processing system that exceeds standard that is used for of the present utility model, because membrane module is arranged in the aeration tank, by the combination technique of using aeration and membrane filtration to carry out synchronously, can make the quality of groundwater after the processing stable, be higher than every index of " drinking water sanitary standard " GB5749-2006, be applicable to each department underground water iron content, the area that manganese content is high, and water handling reclamation area, and described film processing system integrated level height, the land used space is little, is worthy of popularization.
Description of drawings
Fig. 1 implements the utility model to be used for the exceed standard structural representation of phreatic film processing system of ferromanganese ion.
Fig. 2 implements the utility model to be used for exceed standard another structural representation of phreatic film processing system of ferromanganese ion.
Reference numeral lists as follows:
1-underground water lift pump, 2-aeration tank, 3-gas blower, 4-membrane module, 5-suction pump, 6-negative pressure tensimeter, 7-mud discharging pump, 8-floating ball lever meter, 9-water inlet, 10-water outlet.
Embodiment
Below in conjunction with accompanying drawing (Fig. 1-Fig. 2) the utility model is described.
The filtering function explanation of membrane element: being used for filtering membrane element is the ultra-filtration membrane with vesicular structure, the distribution that its principle is the pore size that utilizes vesicular structure and hole is held back carrying out physics greater than the ion in aperture or foreign material, and this is also referred to as the physics crown_interception of film.
Membrane element has the tubular film element, sheet membrane element and hollow fibre membrane component or the like.Membrane module comprises the combination of a plurality of membrane elements, the combination of perhaps single membrane element and other structural parts.
The utility model core technology is a ultra-filtration membrane, the ultrafiltrationmembrane process handling principle comprises two aspects, the one, utilize the physics crown_interception of film to make solvent with solute or particulate physical sepn, water and dissolved salts and other ionogen are small particles, can the osmotic ultrafiltration film, and big particle and the colloidalmaterial of relative molecular mass just stopped by ultra-filtration membrane, thereby makes the part particulate in the water obtain separating; The 2nd, organically the cross-current aeration with built-in membrane module organically combines with the oxygen supply of deironing, demanganization.The micelle of iron content, mn ion and macromolecular substance tunicle are held back back biochemistry pool, finally discharge film processing system with the form of excess sludge.
Ultrafiltrationmembrane process technology deferrization and demanganization is handled the underground water flow process: underground water well～lifting water pump～membrane cisterna～suction pump～water outlet.Treatment process is: the membrane pore size of ultra-filtration membrane is selected the flat sheet membrane of 0.01～1 μ m for use, to the biological particles greater than this aperture, then all is trapped within the membrane cisterna, iron, mn ion are entering Chi Tishi, just contact the oxygen in the water body, equal under the 6.8-7.2 condition, Fe (OH) at pH value
3Be coacervation of colloid and precipitate down, the macromolecular compound that is suspended in the pond also can't leave membrane cisterna by the semipermeability ultra-filtration membrane, thereby the effluent quality of holding back of realizing deferrization and demanganization meets national standard, and the suction pump water outlet can directly be used.
Fig. 1 implements the utility model to be used for the exceed standard structural representation of phreatic film processing system of ferromanganese ion.As shown in Figure 1, be used for the ferromanganese ion phreatic film processing system that exceeds standard and comprise underground water lift pump 1, aeration tank 2, gas blower 3, membrane module 4, suction pump 5, negative pressure tensimeter 6, floating ball lever meter 8, water inlet 9, water outlet 10.Membrane module 4 is arranged in the aeration tank 2, and the inner chamber of membrane module 4 is communicated with the suction pump 5 that is positioned at outside the aeration tank by outlet pipeline.Outlet pipeline is provided with negative pressure tensimeter 6.The pond body of aeration tank 2 is provided with floating ball lever meter 8.The space is communicated with underground water lift pump 1 by suction culvert in the pond of aeration tank 2.Be connected with mud discharging pump 7 at the bottom of the pond of aeration tank.The structure that the aerating apparatus of aeration tank adopts the external gas blower 3 in pond to be connected with spatial aeration tube in the pond.The aperture of film is between 0.01～1 μ m in the membrane module 4.
Principle of work is as follows: it is in the aeration tank 2 that underground water lift pump 1 rises to the film biochemistry pool with former water, this moment, gas blower 3 beginnings blasted air in the pond, after airborne oxygen enters water body, beginning contacts with iron, mn ion in the water, the compound that the ferrous iron or the bivalent manganese of dissolved state is oxidized into undissolved ferric iron or tetravalence manganese, compound contacts with mud, forms big particulate matter.Membrane module 4; can select ultra-filtration membrane or other films for use; be immersed in the water body; arrive suction pump 5 by pipe connection; one negative pressure tensimeter 6 is arranged on the pipeline, and electric contact type pressure gauge can be indicated negative pressure pressure when suction pump moves, when reaching the pair pressure of value setting; automatically the water pump in out of service, the protection diaphragm is in order to avoid impaired.Quantitatively water outlet outside the pond of suction pump, water quality is guaranteed by the membrane module in the pond 4, membrane pore size is between 0.01～1 μ m, assurance is held back large particulate matter in the pond, the air that gas blower 3 provides provides certain film tolerance of washing away for the film surface in membrane cisterna, the flow velocity that keeps water body to produce on the film surface is difficult for making active sludge or zoogloea etc. to be adsorbed on the face, keeps certain membrane flux.The effect of mud discharging pump 7, just for the underground water suspended substance more for a long time, surplus sludge volume discharges just need install a pump automatic mud removing when frequent.8 is floating ball lever meter; for better realizing automatic operating; the protective membrane assembly; floating ball lever meter 8 transmits by signal; assurance suction pump 5 power-equipments such as grade are pressed the program run of design protection liquid level, and when normally moving, high liquid level stops underground water lift pump 1; in high liquid level stop suction pump 5, gas blower 3 keeps running statuses.Water inlet 9 has shown the water inlet direction of former water, and water outlet 10 has shown the outflow direction of handling the back clean water.
The utility model has been realized the PLC automated operation, quality of groundwater after the processing is stable, is higher than every index of " drinking water sanitary standard " GB5749-2006, is applicable to each department underground water iron content, the area that manganese content is high, the little environment that waits in land used space is worthy of popularization.
Fig. 2 implements the utility model to be used for exceed standard another structural representation of phreatic film processing system of ferromanganese ion.This is a kind of integration apparatus, integration apparatus can be placed in the room, the membrane cisterna suction culvert connects the lifting water pump, water pump injects Chi Zhongyuanshui, liquid level is by floating ball lever meter 8 controls, low liquid level water filling, to middle liquid level, the external gas blower 3 in pond brings into operation, and is to blast air in the aeration tank 2 toward membrane cisterna, and the time that aeration tank 2 is filled with in design is 5H, the injection air that gas blower 3 can not stop with system in 24 hours, the set(ting)value of electric contact negative pressure tensimeter 6 is 0.05MPa, and the aeration while intaking, aerating apparatus are the UPVC boring aeration pipe; During high liquid level, suction pump 5 brings into operation, and stops 2 minutes program run in 8 minutes by suction during the suction pump design in the arrival, and the exit of pump pipeline is connected to uses water spot, or user's water tank.Middle liquid level also is that ultra-filtration membrane is the protection liquid level of membrane module 4, when arriving high liquid level, only stops the operation of underground water lift pump 1, and other equipment normally move, and water outlet keeps design discharge, also can do adjusting to the water outlet water yield according to the design variable situation.The underground water suspension content is low, does not have the designing and arranging dredge pump, and only needing regularly manually, opening mud valve gets final product.
The utility model membrane cisterna is that the volume size of aeration tank can be a high proportion of array configurations of different length and width.
Be used for the ferromanganese ion phreatic membrane processing method that exceeds standard, may further comprise the steps: the ferromanganese ion underground water that exceeds standard is risen to and carries out aeration in the aeration tank, utilize the membrane module that is arranged in the aeration tank to filter simultaneously, the suction pump that is arranged in outside the aeration tank pumps out by the outlet pipeline water that the inner chamber of membrane module is good after filtration.Comprise Wastewater Treated by Activated Sludge Process in the described aeration tank, utilize the Degradation of microorganism species, decomposing macromolecular material is micromolecular material, realizes the decomposition of hard-degraded substance.The aperture of film is between 0.01～1 μ m in the described membrane module, and the micelle of iron content, mn ion and macromolecular substance are held back back in the aeration tank by membrane module, finally discharges with the form of excess sludge.
Should be pointed out that the above embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore, although this specification sheets has been described in detail the invention with reference to drawings and Examples, but, those skilled in the art are to be understood that, still can make amendment or be equal to replacement the invention, for example, valve can be set on water-filled pipe and the vent line, membrane module can be fixedly connected on Chi Tishang of aeration tank or the like in various manners; And all do not break away from the technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all is encompassed in the middle of the protection domain of the invention patent.
Claims (7)
1. be used for the ferromanganese ion phreatic film processing system that exceeds standard, it is characterized in that: comprise aeration tank and membrane module, described membrane module is arranged in the aeration tank, and the inner chamber of described membrane module is communicated with the suction pump that is positioned at outside the aeration tank by outlet pipeline.
2. the ferromanganese ion phreatic film processing system that exceeds standard that is used for according to claim 1, it is characterized in that: described outlet pipeline is provided with the negative pressure tensimeter.
3. the ferromanganese ion phreatic film processing system that exceeds standard that is used for according to claim 1, it is characterized in that: the pond body of described aeration tank is provided with floating ball lever meter.
4. the ferromanganese ion phreatic film processing system that exceeds standard that is used for according to claim 1, it is characterized in that: the space is communicated with the underground water lift pump by suction culvert in the pond of described aeration tank.
5. the ferromanganese ion phreatic film processing system that exceeds standard that is used for according to claim 1 is characterized in that: be connected with the mud discharging pump at the bottom of the pond of described aeration tank.
6. the ferromanganese ion phreatic film processing system that exceeds standard that is used for according to claim 1 is characterized in that: the structure that the aerating apparatus of described aeration tank adopts the external gas blower in pond to be connected with spatial aeration tube in the pond.
7. the ferromanganese ion phreatic film processing system that exceeds standard that is used for according to claim 1, it is characterized in that: the aperture of film is between 0.01～1 μ m in the described membrane module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201238498U CN201309845Y (en) | 2008-11-20 | 2008-11-20 | Membrane processing system for groundwater with excess iron and manganese ions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201238498U CN201309845Y (en) | 2008-11-20 | 2008-11-20 | Membrane processing system for groundwater with excess iron and manganese ions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201309845Y true CN201309845Y (en) | 2009-09-16 |
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ID=41107097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201238498U Expired - Lifetime CN201309845Y (en) | 2008-11-20 | 2008-11-20 | Membrane processing system for groundwater with excess iron and manganese ions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201309845Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219293A (en) * | 2011-03-15 | 2011-10-19 | 吉林大学 | Improved aeration well for in-situ remediation of polluted underground water and remediation method |
| CN110921809A (en) * | 2019-12-14 | 2020-03-27 | 吕广鑫 | High-efficient separator of iron ion in mine water sample |
-
2008
- 2008-11-20 CN CNU2008201238498U patent/CN201309845Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219293A (en) * | 2011-03-15 | 2011-10-19 | 吉林大学 | Improved aeration well for in-situ remediation of polluted underground water and remediation method |
| CN102219293B (en) * | 2011-03-15 | 2012-11-28 | 吉林大学 | Improved aeration well for in-situ remediation of polluted underground water and remediation method |
| CN110921809A (en) * | 2019-12-14 | 2020-03-27 | 吕广鑫 | High-efficient separator of iron ion in mine water sample |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Film treatment system and method for ferromanganese ion overproof groundwater Effective date of registration: 20140814 Granted publication date: 20090916 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: TAWA (Beijing) Co., Ltd. Registration number: 2014990000659 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20150930 Granted publication date: 20090916 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: TAWA (Beijing) Co., Ltd. Registration number: 2014990000659 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Film treatment system and method for ferromanganese ion overproof groundwater Effective date of registration: 20151106 Granted publication date: 20090916 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: TAWA (Beijing) Co., Ltd. Registration number: 2015990000958 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 100085, Beijing, Haidian District on the road No. 12, No. 1, building 4, A District, room 411-413 Patentee after: Tawa Polytron Technologies Inc Address before: 100085, Beijing, Haidian District on the road No. 26, Zhongguancun venture building, Room 303 Patentee before: TAWA (Beijing) Co., Ltd. |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170307 Granted publication date: 20090916 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: TAWA (Beijing) Co., Ltd. Registration number: 2015990000958 |
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| CX01 | Expiry of patent term |
Granted publication date: 20090916 |
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| CX01 | Expiry of patent term |