CN101825360A - Method and device for recycling high-pressure dissolved steam exhaust of diluting tank in alumina production - Google Patents
Method and device for recycling high-pressure dissolved steam exhaust of diluting tank in alumina production Download PDFInfo
- Publication number
- CN101825360A CN101825360A CN201010166461A CN201010166461A CN101825360A CN 101825360 A CN101825360 A CN 101825360A CN 201010166461 A CN201010166461 A CN 201010166461A CN 201010166461 A CN201010166461 A CN 201010166461A CN 101825360 A CN101825360 A CN 101825360A
- Authority
- CN
- China
- Prior art keywords
- exhaust steam
- hot water
- recoverer
- water
- steam exhaust
- 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.)
- Pending
Links
Images
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a method and a device for recycling high-pressure dissolved steam exhaust of a diluting tank in alumina production. The steam exhaust produced by a diluting tank (1) and a final condensate water self-evaporator is recycled by adopting a steam exhaust reclaiming device (2), the heat of the steam exhaust is collected by sprayed cold water, and the formed hot water enters a hot water tank (4) from a bottom outlet of the steam exhaust reclaiming device (2) and is delivered to a hot water station through a hot water delivery pump (5) to serve as red mud washing water and hot water for a whole plant. The flow rate of new water is adjusted by the interlocking of an adjusting valve (7) and a thermometer (9) so as to control the temperature of the hot water at the outlet of the steam exhaust reclaiming device (2), and the liquid level balance of the hot water tank (4) is controlled by the interlocking of an adjusting valve (6) and a liquid level meter (10). A water seal (3) is arranged on a steam exhaust pipeline, and a branch pipe is connected to an emergency steam outlet at the top of the steam exhaust reclaiming device (2). The method and the device solve the problem of reclaiming the steam exhaust produced by the diluting tank and the final condensate water self-evaporator, avoid environmental pollution, effectively recycle waste heat, and reduce the production energy consumption.
Description
Technical field
The present invention relates to a kind of alumina producing mesohigh stripping dilution trap exhaust steam recoverying and utilizing method and device.
Background technology
In the high pressure dissolving-out process of alumina producer, enter dilution trap after the flash distillation of stripping slurry process final stage ore pulp flash-pot, slip produces exhaust steam (100 ~ 110 ℃) through spontaneous evaporation behind the dilatation release of pressure once more in dilution trap, and mixes in the back introducing vapour pressure condenser with the exhaust steam (100 ~ 110 ℃) that comes from final stage condensed water flash-pot.Vapour pressure condenser top is adopted from comprehensively the circulate new water of water station of alumina producer and is sprayed the recovery exhaust steam, and the part exhaust steam is sprayed to be become hot water and be sent to the hot water station after cold water reclaims, and part hot water reuses after then sending comprehensive circulation water station cooling back to.Because the vapour pressure condenser adopts common shower nozzle water spray, deflection plate is adopted at the middle part, and this kind form causes the rate of recovery of vapour pressure condenser not high, and the exhaust steam rate of recovery is less than 60%, and all the other not recoverable part exhaust steam then directly enter in the atmosphere.
Reclaim the exhaust steam of dilution trap and final stage condensed water flash-pot by the vapour pressure condenser portion, because the rate of recovery is not high, cause the part exhaust steam directly to enter in the atmosphere, can cause exhaust steam residual heat to fail to reclaim direct losses so on the one hand, increase the production cost of alumina producer, enter in the atmosphere with the exhaust steam of alkali on a small quantity on the other hand and can cause environmental pollution.
In addition, because the recovery technology of this kind exhaust steam does not adopt automation control, thus the temperature of uncontrollable vapour pressure condenser outlet at bottom hot water, the general collected hot water temperature of exhaust steam is below 65 ℃.After hot water under this temperature was delivered to the hot water station, need reuse that initial steam is heated to more than 90 ℃ could be as red mud wash water and full station-service hot water.This technology can cause the consumption of hot water station initial steam to increase, thereby increases the energy consumption of aluminium oxide.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of alumina producing mesohigh stripping dilution trap exhaust steam recoverying and utilizing method and device are provided, low to overcome the exhaust steam rate of recovery that prior art exists, the exhaust steam residual heat loss is big, and the exhaust steam with alkali enters deficiencies such as can causing environmental pollution in the atmosphere on a small quantity.
Alumina producing mesohigh stripping dilution trap exhaust steam recoverying and utilizing method, by the following technical solutions: it adopts exhaust steam recoverer to recycle exhaust steam, receives the mixing exhaust steam of flash distillation of dilution trap slip and the generation of final stage condensed water flash-pot back and forth by exhaust steam recoverer spray cold water; Cold water is collected the exhaust steam heat, forms hot water and enters hot water storgae from the exhaust steam recoverer outlet at bottom, is pumped to the hot water station of alumina producer as red mud wash water and full station-service hot water by delivery again.
The exhaust steam that dilution trap and final stage condensed water flash-pot produce enters from the exhaust steam recoverer bottom, the up arc bottom tapping in exhaust steam recoverer of exhaust steam, new water enters from exhaust steam recoverer top and forms spray cold water, cold water is descending uniform on arc top, exhaust steam mixes by heat exchange and at the arc edge with cold water, and gravity flow enters hot water storgae behind the formation hot water.
The hot water temperature of exhaust steam recoverer outlet at bottom is more than 80 ℃.
By regulating the flow of new water, reach the desired temperature of technology with the hot water of controlling the exhaust steam recoverer outlet at bottom.
Alumina producing mesohigh stripping dilution trap exhaust steam recycle device, by the following technical solutions: exhaust steam recoverer is set on dilution trap top, exhaust steam recoverer top water inlet is connected with new water lines, exhaust steam recoverer bottom delivery port is connected with hot water storgae, hot water storgae is connected with hot water supplying pump, and hot water supplying pump is connected with hot water station pipeline.
The top of exhaust steam recoverer is provided with new water inlet, and new water inlet is connected with the rotary nozzle that is circular layout; Be provided with the multilayer arc at the middle part of exhaust steam recoverer, be provided with the exhaust steam import in the middle of the bottom, the bottom side is provided with hot water outlet; Top at exhaust steam recoverer is provided with the emergency exit.
Control valve and flowmeter are set entering on the new water lines of exhaust steam recoverer, delivery port is provided with thermometer in the exhaust steam recoverer bottom; Control valve and thermometer interlocking.By control valve the flow of new water is regulated, reached the desired temperature of technology in order to the hot water of controlling the exhaust steam recoverer outlet at bottom.
On the exhaust steam pipeline before entering exhaust steam recoverer liquid packing is set, connects arm on the liquid packing to exhaust steam recoverer top emergency venthole.When digestion series occurs causing unusually exhaust steam pressure to raise, in order to guarantee the safety of exhaust steam recoverer, liquid packing will in time be opened, and superpressure exhaust steam direct short-circuit is disposed in the atmosphere.
On the outlet of hot water supplying pump, control valve is set, and the interlocking of the liquid level gauge on this control valve and the hot water storgae.Can guarantee the balance of hot water storgae liquid level by the hot water flow that control valve is regulated the delivery pump discharge.
During device work, the exhaust steam of dilution trap and the generation of final stage condensed water flash-pot is introduced from the exhaust steam recoverer bottom, top adopts new water to spray cooling.Exhaust steam enters hot water storgae after being collected formation hot water, and reusable heat water delivery pump is delivered to the hot water station as red mud wash water and full station-service hot water.Owing to be provided with control valve and flowmeter entering on the new water pipe on exhaust steam recoverer top, be provided with thermometer on the exhaust steam recoverer outlet at bottom hot-water line, and with control valve interlocking, can control exhaust steam recoverer mouth hot water temperature to reach technological requirement by the flow of regulating new water.On the hot water supplying pump export pipeline, control valve is set, and interlocks, in order to regulate the liquid level equilibrium of control hot water storgae with the liquid level gauge on the hot water storgae.In addition, on the exhaust steam pipeline before entering exhaust steam recoverer liquid packing is set, connect an arm on the liquid packing to exhaust steam recoverer top emergency venthole, when digestion series occurs causing unusually exhaust steam pressure to raise, liquid packing is opened automatically, superpressure exhaust steam direct short-circuit is disposed in the atmosphere, has guaranteed the safety of exhaust steam recoverer.
The present invention compares with general vapour pressure condenser recovery exhaust steam technology, and it is obvious that the present invention reclaims benefit, the automaticity height, and operation control is easily.The present invention has not only solved the exhaust steam of dilution trap and the generation of final stage condensed water flash-pot and has reclaimed problem, avoided exhaust steam to efflux the environmental pollution that atmosphere causes, simultaneously, the present invention can collect exhaust steam effectively fully, fully recycle exhaust steam residual heat, save the consumption of hot water station initial steam, thereby reduced the energy consumption of aluminium oxide.
Description of drawings:
Fig. 1 is schematic flow sheet of the present invention, device connection diagram.
Fig. 2 is an exhaust steam recoverer structural representation of the present invention.
The specific embodiment:
Embodiments of the invention: as shown in Figure 1, method of the present invention is provided with exhaust steam recoverer 2 on dilution trap 1 top and reclaims the stripping exhaust steam.The exhaust steam that the dilution trap 1 of high pressure stripping produces and the exhaust steam of final stage condensed water flash-pot mix the back and introduce from the bottom of exhaust steam recoverer 2, multilayer arc through exhaust steam recoverer 2, carry out heat exchange with spray cold water from exhaust steam recoverer 2 tops, the exhaust steam condensation is got off, and heating cold water, the two mixes back formation hot water and comes out to enter the hot water storgae 4 from exhaust steam recoverer 2 bottoms.By regulating the flow of new water, the hot water temperature of control exhaust steam recoverer 2 outlet at bottoms.The hot water temperature of exhaust steam recoverer 2 outlet at bottoms is more than 80 ℃.
Device of the present invention is: on dilution trap 1 top exhaust steam recoverer 2 is set, exhaust steam recoverer 2 top water inlets are connected with new water lines, exhaust steam recoverer 2 bottom delivery ports are connected with hot water storgae 4, and hot water storgae 4 is connected with hot water supplying pump 5, and hot water supplying pump 5 is connected with hot water station pipeline.
The top of exhaust steam recoverer 2 is provided with new water inlet 11, and new water inlet 11 is connected with the rotary nozzle 13 that is circular layout; Be provided with multilayer arc 14 at the middle part of exhaust steam recoverer 2, be provided with exhaust steam import 16 in the middle of the bottom, the bottom side is provided with hot water outlet 15; Be provided with emergency exit 12 at the top of exhaust steam recoverer 2.
Control valve 7 and flowmeter 8 are set entering on the new water lines of exhaust steam recoverer 2, thermometer 9 are set at exhaust steam recoverer 2 bottom delivery ports; Control valve 7 and thermometer 9 interlockings.Flow by 7 pairs of new water of control valve is regulated, and reaches the desired temperature of technology in order to the hot water of controlling exhaust steam recoverer 2 outlet at bottoms.
On the exhaust steam pipeline before entering exhaust steam recoverer 2 liquid packing 3 is set, connects arm on the liquid packing 3 to exhaust steam recoverer 2 top emergency ventholes.When digestion series occurs causing unusually exhaust steam pressure to raise, in order to guarantee the safety of exhaust steam recoverer 2, liquid packing 3 will in time be opened, and superpressure exhaust steam direct short-circuit is disposed in the atmosphere.
Control valve 6 is set, and this control valve 6 is interlocked with the liquid level gauge 10 on the hot water storgae 4 on the outlet of hot water supplying pump 5.Can guarantee the balance of hot water storgae liquid level by the hot water flow of control valve 6 adjusting hot water supplying pumps 5 outlets.
Claims (9)
1. alumina producing mesohigh stripping dilution trap exhaust steam recoverying and utilizing method, it is characterized in that: it adopts exhaust steam recoverer to recycle exhaust steam, receives the mixing exhaust steam of dilution trap (1) slip flash distillation and the generation of final stage condensed water flash-pot back and forth by exhaust steam recoverer (2) spray cold water; Cold water is collected the exhaust steam heat, forms hot water and enters hot water storgae (4) from exhaust steam recoverer (2) outlet at bottom, delivers to the hot water station of alumina producer as red mud wash water and full station-service hot water by hot water supplying pump (5) again.
2. alumina producing mesohigh stripping dilution trap exhaust steam recoverying and utilizing method according to claim 1, it is characterized in that: the exhaust steam that dilution trap (1) and final stage condensed water flash-pot produce enters from exhaust steam recoverer (2) bottom, the up arc bottom tapping in exhaust steam recoverer (2) of exhaust steam, new water enters from exhaust steam recoverer (2) top and forms spray cold water, cold water is descending uniform on arc top, exhaust steam mixes by heat exchange and at the arc edge with cold water, and gravity flow enters hot water storgae (4) behind the formation hot water.
3. alumina producing mesohigh stripping dilution trap exhaust steam recoverying and utilizing method according to claim 1, it is characterized in that: the hot water temperature of exhaust steam recoverer (2) outlet at bottom is more than 80 ℃.
4. alumina producing mesohigh stripping dilution trap exhaust steam recoverying and utilizing method according to claim 2 is characterized in that: by regulating the flow of new water, the hot water temperature of control exhaust steam recoverer (2) outlet at bottom.
5. alumina producing mesohigh stripping dilution trap exhaust steam recycle device as claimed in claim 1, it is characterized in that: exhaust steam recoverer (2) is set on dilution trap (1) top, exhaust steam recoverer (2) top water inlet is connected with new water lines, exhaust steam recoverer (2) bottom delivery port is connected with hot water storgae (4), hot water storgae (4) is connected with hot water supplying pump (5), and hot water supplying pump (5) is connected with hot water station pipeline.
6. alumina producing mesohigh stripping dilution trap exhaust steam recycle device according to claim 5, it is characterized in that: the top of exhaust steam recoverer (2) is provided with new water inlet (11), and new water inlet (11) is connected with the rotary nozzle that is circular layout (13); Be provided with multilayer arc (14) at the middle part of exhaust steam recoverer (2), be provided with exhaust steam import (16) in the middle of the bottom, the bottom side is provided with hot water outlet (15); Be provided with emergency exit (12) at the top of exhaust steam recoverer (2).
7. alumina producing mesohigh stripping dilution trap exhaust steam recycle device according to claim 1, it is characterized in that: control valve (7) and flowmeter (8) are set on the new water lines that enters exhaust steam recoverer (2), and delivery port is provided with thermometer (9) in exhaust steam recoverer (2) bottom; Control valve (7) and thermometer (9) interlocking.
8. alumina producing mesohigh stripping dilution trap exhaust steam recycle device according to claim 5, it is characterized in that: liquid packing (3) is set entering on the preceding exhaust steam pipeline of exhaust steam recoverer (2), connects arm on the liquid packing (3) to exhaust steam recoverer (2) top emergency venthole.
9. alumina producing mesohigh stripping dilution trap exhaust steam recycle device according to claim 5, it is characterized in that: control valve (6) is set on the outlet of hot water supplying pump (5), and control valve (6) is interlocked with the liquid level gauge (10) on the hot water storgae (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166461A CN101825360A (en) | 2010-05-10 | 2010-05-10 | Method and device for recycling high-pressure dissolved steam exhaust of diluting tank in alumina production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166461A CN101825360A (en) | 2010-05-10 | 2010-05-10 | Method and device for recycling high-pressure dissolved steam exhaust of diluting tank in alumina production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101825360A true CN101825360A (en) | 2010-09-08 |
Family
ID=42689424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010166461A Pending CN101825360A (en) | 2010-05-10 | 2010-05-10 | Method and device for recycling high-pressure dissolved steam exhaust of diluting tank in alumina production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101825360A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103101939A (en) * | 2011-11-14 | 2013-05-15 | 沈阳铝镁设计研究院有限公司 | Method for decreasing heat exchange area needed by dissolution system |
| CN103288109A (en) * | 2013-06-24 | 2013-09-11 | 中国铝业股份有限公司 | Alumina high pressure dissolution dilution ore slurry exhaust steam recovery method |
| CN104776725A (en) * | 2014-01-14 | 2015-07-15 | 沈阳铝镁设计研究院有限公司 | Device and method for recovering dust in smoke of aluminum hydroxide roasting furnace |
| CN104896967A (en) * | 2015-06-10 | 2015-09-09 | 济南仙峰泰山化工设备有限公司 | Multifunctional recycling system for completely recycling exhausted steam |
| CN108168329A (en) * | 2017-12-29 | 2018-06-15 | 铜陵汇宇实业有限公司 | A kind of condensate recycling device |
| CN112344318A (en) * | 2019-08-09 | 2021-02-09 | 中国石油化工股份有限公司 | Atomizing deaerator exhaust steam recovery device |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4776170A (en) * | 1985-09-20 | 1988-10-11 | Bbc Brown, Boveri & Company, Ltd. | Device for degassing the condensate in the cycle of an electricity generating plant |
| US5343705A (en) * | 1991-03-08 | 1994-09-06 | Graham Corporation | Method and apparatus for maintaining a required temperature differential in vacuum deaerators |
| CN2482451Y (en) * | 2001-08-10 | 2002-03-20 | 朱常平 | Exhaust steam recovering device |
| CN2672594Y (en) * | 2004-01-17 | 2005-01-19 | 威海际高制冷空调设备有限公司 | Evaporation type condenser |
| CN2818794Y (en) * | 2005-08-10 | 2006-09-20 | 杨君廷 | Self-adjusting water-jetting dead steam recovering device |
| CN2835805Y (en) * | 2005-07-26 | 2006-11-08 | 杨君廷 | Absorption type dead steam recovering apparatus |
| CN2835804Y (en) * | 2005-07-26 | 2006-11-08 | 杨君廷 | Dead steam and condensed water recovering system |
| CN2921758Y (en) * | 2006-05-29 | 2007-07-11 | 吉永平 | Exhaust-steam recovering device |
| CN200972337Y (en) * | 2006-09-14 | 2007-11-07 | 吴杨高 | Absorption general vapour recovery device |
| CN101290191A (en) * | 2008-06-13 | 2008-10-22 | 魏仕英 | Mixed flow type atomizing propulsion aeration cooling tower |
| CN101445256A (en) * | 2008-12-31 | 2009-06-03 | 东北大学设计研究院（有限公司） | Stripping technique for large pipeline for monohydrate hard bauxite ore with staying tank added |
-
2010
- 2010-05-10 CN CN201010166461A patent/CN101825360A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4776170A (en) * | 1985-09-20 | 1988-10-11 | Bbc Brown, Boveri & Company, Ltd. | Device for degassing the condensate in the cycle of an electricity generating plant |
| US5343705A (en) * | 1991-03-08 | 1994-09-06 | Graham Corporation | Method and apparatus for maintaining a required temperature differential in vacuum deaerators |
| CN2482451Y (en) * | 2001-08-10 | 2002-03-20 | 朱常平 | Exhaust steam recovering device |
| CN2672594Y (en) * | 2004-01-17 | 2005-01-19 | 威海际高制冷空调设备有限公司 | Evaporation type condenser |
| CN2835805Y (en) * | 2005-07-26 | 2006-11-08 | 杨君廷 | Absorption type dead steam recovering apparatus |
| CN2835804Y (en) * | 2005-07-26 | 2006-11-08 | 杨君廷 | Dead steam and condensed water recovering system |
| CN2818794Y (en) * | 2005-08-10 | 2006-09-20 | 杨君廷 | Self-adjusting water-jetting dead steam recovering device |
| CN2921758Y (en) * | 2006-05-29 | 2007-07-11 | 吉永平 | Exhaust-steam recovering device |
| CN200972337Y (en) * | 2006-09-14 | 2007-11-07 | 吴杨高 | Absorption general vapour recovery device |
| CN101290191A (en) * | 2008-06-13 | 2008-10-22 | 魏仕英 | Mixed flow type atomizing propulsion aeration cooling tower |
| CN101445256A (en) * | 2008-12-31 | 2009-06-03 | 东北大学设计研究院（有限公司） | Stripping technique for large pipeline for monohydrate hard bauxite ore with staying tank added |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103101939A (en) * | 2011-11-14 | 2013-05-15 | 沈阳铝镁设计研究院有限公司 | Method for decreasing heat exchange area needed by dissolution system |
| CN103288109A (en) * | 2013-06-24 | 2013-09-11 | 中国铝业股份有限公司 | Alumina high pressure dissolution dilution ore slurry exhaust steam recovery method |
| CN104776725A (en) * | 2014-01-14 | 2015-07-15 | 沈阳铝镁设计研究院有限公司 | Device and method for recovering dust in smoke of aluminum hydroxide roasting furnace |
| CN104896967A (en) * | 2015-06-10 | 2015-09-09 | 济南仙峰泰山化工设备有限公司 | Multifunctional recycling system for completely recycling exhausted steam |
| CN108168329A (en) * | 2017-12-29 | 2018-06-15 | 铜陵汇宇实业有限公司 | A kind of condensate recycling device |
| CN112344318A (en) * | 2019-08-09 | 2021-02-09 | 中国石油化工股份有限公司 | Atomizing deaerator exhaust steam recovery device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101825360A (en) | Method and device for recycling high-pressure dissolved steam exhaust of diluting tank in alumina production | |
| CN202450017U (en) | Three-kettle condensation device for producing synthetic rubber by using solution method | |
| CN106517348B (en) | Potassium manganate continuous automatic production process | |
| CN101445747B (en) | Hydrofining process integration method | |
| CN209155563U (en) | A kind of residual neat recovering system of solid water glass dissolution | |
| CN105271324B (en) | A kind of low pressure exhaust steam recycling system | |
| CN111544914A (en) | Coal gasification low pressure black water flash distillation heat recovery system | |
| CN108854167B (en) | Recycling system of condensate after methane steam conversion in coke oven gas | |
| CN202170248U (en) | Tubular digesting device for ore slurry of gibbsite | |
| CN207793116U (en) | Methanol Recovery energy saver | |
| WO2020114284A1 (en) | System and method for continuously hydrolyzing hemicellulose to prepare xylose solution | |
| CN206036978U (en) | Use condensate water heat recovery unit of vapor compressor as primary clustering | |
| CN202274767U (en) | Dead steam recovery processor | |
| CN106830026A (en) | The method of alumina producing mesohigh dissolution | |
| CN102443420A (en) | Crude oil deep vacuum distillation process and system | |
| CN108654127A (en) | A kind of steam condensate recovery system | |
| CN201637289U (en) | Vapor recovery device | |
| CN103771472A (en) | Method for recovering and utilizing exhausted steam from alumina production device by Bayer process | |
| CN103961966B (en) | A kind of system that solves acid-restoring plant dynamic wave furnace gas temperature superelevation | |
| CN210796289U (en) | High-efficient low energy consumption sodium methoxide purification equipment | |
| CN209193996U (en) | A kind of system that hemicellulose continuous hydrolysis prepares Xylose | |
| CN113184936A (en) | Efficient and energy-saving ammonia distillation deacidification system and method for recycling ammonia nitrogen | |
| CN206669709U (en) | A kind of dead steam recovery system | |
| CN106115749B (en) | A kind of dissolved exhaust steam in alumina production utilizes system and method | |
| CN219032089U (en) | Tower device for producing oxidized asphalt |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100908 |