CN101816904B - Movable air stirring system for preventing and clearing away sediment of phosphoric acid slag in tank - Google Patents
Movable air stirring system for preventing and clearing away sediment of phosphoric acid slag in tank Download PDFInfo
- Publication number
- CN101816904B CN101816904B CN2010101759868A CN201010175986A CN101816904B CN 101816904 B CN101816904 B CN 101816904B CN 2010101759868 A CN2010101759868 A CN 2010101759868A CN 201010175986 A CN201010175986 A CN 201010175986A CN 101816904 B CN101816904 B CN 101816904B
- Authority
- CN
- China
- Prior art keywords
- tank
- phosphoric acid
- shower nozzle
- purging
- assembly pulley
- 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 - Fee Related
Links
Images
Landscapes
- Cleaning In General (AREA)
Abstract
The invention discloses a movable air stirring system for preventing and clearing away sediment of phosphoric acid slag in a tank. A horizontal inhaul cable is arranged at the top end of a tank wall along the diameter direction; a movable pulley block is arranged on the horizontal inhaul cable; a purging nozzle connected with compressed air is suspended inside a tank body by the pulley block and the inhaul cable in the vertical direction to realize purging; and the purging nozzle can freely move inside the tank body by adjusting the circumference position of the horizontal inhaul cable, the horizontal position of the pulley block and the position of the purging nozzle in the vertical direction. The movable air stirring system conveys the compressed air from an air compressor to the purging nozzle arranged in the tank by a pipeline, can make the purging nozzle freely move in the longitudinal, horizontal and up-down directions to realize the function of stirring the phosphoric acid slag inside the phosphoric acid tank, can effectively clear away the sediment of the phosphoric acid slag in the phosphoric acid tank and prevent the generation thereof and can avoid huge economic loss of the enterprise due to the sediment generated in the phosphoric acid tank and avoid influencing normal operation of the enterprise due to long-term production suspension cleaning.
Description
Technical field
The present invention relates to a kind of cleaning of large-scale wet tank internal precipitate thing and the device that prevents, especially a kind of removable air stirring system that is used to prevent and clears up sediment of phosphoric acid slag in tank.
Background technology
At home in the Chemical Manufacture enterprise; All there is an identical difficult problem in every enterprise of phosphoric acid tank stores phosphoric acid that utilizes; It also is the difficult problem that solves of failing all the time in process of production; That is exactly to produce sediment of phosphoric acid slag in the phosphoric acid jar, when the deposition in the phosphoric acid jar is accumulated to certain altitude, will influence the normal use of storage tank, and phosphoric acid precipitates can be stopped up the defeated sour pump intake pipeline of the circulatory system, obstruction of tank body, the storage acid ability of reduction tank body.
The phosphoric acid slag is that the iron aluminide of phosphoric acid and phosphoric acid is formed, and can directly be used for producing as deposition does not take place, but in a single day produce deposition, and especially the amount of deposition acquires a certain degree, and then must handle.For example, 15 meters high phosphoric acid jar will influence normal use when deposition highly surpasses 1 meter (being higher than sour pump line line inlet), and precipitates the cleaning of just must stopping when highly reaching 3-6 rice, and the phosphoric acid precipitates of some enterprise reaches as high as 6-10 rice.Because the corrosivity of phosphoric acid is strong and tank body appearance and size is tall and big, the labor cleaning is carried out in the use that only stops storage tank to the treating method of phosphoric acid jar internal precipitate at present, and this phosphoric acid precipitates is difficult to cleaning, when cleaning, also has great risk simultaneously.If precipitate higherly, through regular meeting the landslide phenomenon taking place during cleaning causes casualties, if exist phosphoric acid and deposition admixture that all kinds of accidents that casualties and sediment leak take place more easily, and in cleaning, yet can cause serious environmental to pollute.The once required expense of phosphoric acid jar cleaning generally speaking: more than 60 ten thousand yuan of labour costs, material and machinery takes more than 20 ten thousand yuan of more than 50 ten thousand yuan, the replacing of more than 60 ten thousand yuan of tank body prices for repairing (repairing of line with rubber etc.), valve spare part, and the total cleaning up cost will be about 1,900,000 yuan; In addition; Phosphoric acid jar with 28 meters of diameters is an example, if calculate by 6 meters high phosphoric acid precipitates, the phosphoric acid slag of deposition will reach about 6000 tons; Suppose 500 yuan of phosphatase 24s per ton; The cleaning of phosphoric acid slag will directly cause economic loss to reach about 2,700 ten thousand yuan so, and the phosphoric acid sediment intractable that clears, and handling also will be spent in some area; Beginning to repair end to tank body from cleaning generally needs 3-4 month time, this shows that the economic loss that phosphoric acid precipitates is brought is huge.Solve the phosphoric acid sediment of phosphoric acid slag in tank, key will solve two aspects:
1, the phosphoric acid jar of existing phosphoric acid precipitates is realized not stopping production and adopt unartificial manner of cleaning up to solve the inner existing sediment of phosphoric acid slag of phosphoric acid jar fast;
2, avoid the phosphoric acid storage tank in use to produce sediment of phosphoric acid slag.
Summary of the invention
The purpose of this invention is to provide a covering device; Can be used for the cleaning of large-scale wet tank internal precipitate thing and prevent precipitating in the storage tank; Particularly in chemical industry, can effectively remove and prevent the generation of phosphoric acid tank inside sediment of phosphoric acid slag thing; Avoid enterprise to influence company with the long-time cleaning that stops production and normally move, can well solve the problem of above-mentioned existence because of the phosphoric acid jar produces huge economic loss that deposition brought.
The objective of the invention is to realize through following technical scheme:
A kind of removable air stirring system that is used to prevent and clears up sediment of phosphoric acid slag in tank; Along diametric(al) one jump stay is set on the tank skin top; Movably assembly pulley is installed on jump stay, and the drag-line through assembly pulley and vertical direction will be connected with compressed-air actuated purging shower nozzle and be suspended on tank interior and realize purging; Through the circumferential position of adjustment jump stay, the horizontal level of assembly pulley and the position of purging shower nozzle vertical direction, realize purging shower nozzle and move in the optional position of tank interior.
Said jump stay two ends are installed on main suspension frame, the secondary suspension frame through pulley, and said main suspension frame is installed on the tank skin top with secondary suspension frame, lays respectively at the two ends of jar diameter; Said main suspension frame is equipped with and can moves up and down system along running gear, assembly pulley horizontal movement system and the purging shower nozzle that tank skin moves; Be equipped with on the said secondary suspension frame running gear that can move along tank skin and with the corresponding assembly pulley horizontal movement system of main suspension frame.Said running gear, assembly pulley horizontal movement system and the purging shower nozzle system that moves up and down all adopt U.S. mark bevel gear as transmission mechanism.
Said jump stay is many, and many group assembly pulleys and the corresponding shower nozzles that purge are installed on every.
The two-position switch magnetic valve is installed on the air inlet pipeline of said purging shower nozzle, is carried out SECO, realize that regularly the subregion purges stirring through the instrument automatic control system.
Along said tank skin periphery fitting operation platform, berm width is 1200-1500mm, and height and position is 1000-1100mm apart from the tank body top.
System's inner metal component material adopts stainless steel 316L or UB6 material; Non-metallic component adopts nylon, polypropylene or high-molecular polythene (UHMWPE) material.
Said drag-line all adopts the high-molecular polythene hawser; For the pipeline that purges the shower nozzle air feed is band netting twine plastics compressed-air line.
Said assembly pulley has adopted three fixed pulley structural designs, is used for realizing the horizontal level of assembly pulley and moving of purging shower nozzle vertical direction position respectively.
The present invention provides a kind of removable air stirring system; To be transported to through pipeline from the compressed air of air compressor and be arranged on a jar interior purging shower nozzle; Through being installed on the major-minor suspension frame on tank skin top; Can make and purge shower nozzle and do vertically, laterally, three directions moves arbitrarily up and down; Reach stirring action to the inner phosphoric acid sediment of phosphoric acid jar; Can effectively remove and prevent the generation of phosphoric acid tank inside sediment of phosphoric acid slag thing, have compact conformation simultaneously, purge stirring capacity big, purge characteristics such as shower nozzle can be adjusted no blind spot, long service life arbitrarily, fault rate is low, maintenances is simple, easy to operate, can avoid enterprise to clear up and influence company and normally move because of the phosphoric acid jar produces huge economic loss that deposition brought and long-time stopping production.
Description of drawings
According to accompanying drawing and embodiment the present invention is done further explain below.
Fig. 1 is that the said removable air stirring of embodiment of the invention system forms principle schematic;
Fig. 2 is the said removable air stirring tank body mounting plane figure of system of the embodiment of the invention;
Fig. 3 is the said main suspension frame front view of the embodiment of the invention;
Fig. 4 is the said main suspension frame left view of Fig. 3;
Fig. 5 is the said secondary suspension frame front view of the embodiment of the invention;
Fig. 6 is the said secondary suspension frame left view of Fig. 5;
Fig. 7 is said pulley block structure of the embodiment of the invention and scheme of installation;
Fig. 8 is the said purging nozzle structure of an embodiment of the invention sketch map.
Among the figure:
1, air compressor; 2, air reservoir; 3, two-position switch magnetic valve; 4, admission line; 5, main suspension frame; 51, assembly pulley horizontal movement system; 52, running gear; 53, purge shower nozzle and move up and down system; 6, secondary suspension frame; 61, running gear; 62, fixed pulley; 7, assembly pulley; 8, horizontally suspend drag-line; 9, vertically hang drag-line; 10, purge the shower nozzle gas supply line; 11, tank skin; 12, purge shower nozzle; 13, operating platform.
The specific embodiment
Shown in Fig. 1 to 2; Having provided the system of a specific embodiment that is used to prevent and clears up the removable air stirring system of sediment of phosphoric acid slag in tank according to the invention forms and tank body mounting plane figure; Forms the feeder of system by air compressor 1 and air reservoir, for system provides purging required compressed air.Be connected on the main suspension frame 5 through admission line 4; Main suspension frame 5 hangs the top that frame 6 is installed on tank skin 11 with pair; Lay respectively at the two ends of jar diameter; Between main suspension frame, secondary suspension frame, set up and horizontally suspend drag-line 8, movably assembly pulley 7 is installed above that, will be connected with compressed-air actuated purging shower nozzle 12 through assembly pulley 7 and vertical suspension drag-line 9 and be suspended on tank interior and realize purging.For large tank; Can set up many horizontally suspends drag-line and forms many group systems; Many group assembly pulleys and the corresponding shower nozzle that purges are installed on every, and opened type phosphoric acid tank diameter size is bigger, and 1-2 group suspension generally can be installed; Can install 2-4 for every group and purge shower nozzle, can reach best purging mixing effect.Present embodiment adopts 1 group of suspension, is equipped with 2 and purges shower nozzle.
Shown in Fig. 3-4, said main suspension frame 5 is equipped with and can moves up and down system 53 along running gear 52, assembly pulley horizontal movement system 51 and the purging shower nozzle that tank skin moves.
Shown in Fig. 5-6, the running gear 61 and fixed pulley 62 that can move along tank skin are installed on the said secondary suspension frame 6, fixed pulley 62 is corresponding with main suspension frame, composition assembly pulley horizontal movement system.Said running gear 52, assembly pulley horizontal movement system 51 and purge shower nozzle and move up and down system 53 and all adopts the beautiful bevel gear of marking as transmission mechanism.
Fig. 7 has provided the structure and the scheme of installation of assembly pulley 7; Assembly pulley has adopted three fixed pulley structural designs; Be used for realizing the horizontal level of assembly pulley and moving of purging shower nozzle vertical direction position respectively; Assembly pulley 7 is fixed with one that horizontally suspends drag-line 8 self, and horizontally suspends on the drag-line in another root through suspended; Other has two fixed pulleys that are installed on the assembly pulley 7 to realize vertically suspension drag-line 9 and the function that turns to that purges shower nozzle gas supply line 10.
Two-position switch magnetic valve 3 is installed on the air inlet pipeline of said purging shower nozzle, is carried out SECO, realize that regularly the subregion purges stirring, reach and save gas consumption and good mixing effect through the instrument automatic control system.
Along said tank skin periphery fitting operation platform, berm width is 1200-1500mm, and height and position is 1000-1100mm apart from the tank body top.Be convenient to operation and observation on the one hand, the more important thing is and utilize this platform further to strengthen to have better rigidity in addition, tank body stiffness deformation ability is protected tank body.
System's inner metal component material adopts stainless steel 316L or UB6 material; Non-metallic component adopts nylon, polypropylene or high-molecular polythene (UHMWPE) material, and said drag-line all adopts the high-molecular polythene hawser, for the pipeline that purges the shower nozzle air feed is band netting twine plastics compressed-air line.Make whole system have stronger resistance to corrosion.Particularly suspension has adopted the high-molecular polythene hawser, makes suspension have uvioresistant, corrosion-resistant and higher intensity, and has reduced the weight of suspension.
Its operation principle is following:
Scale removal process to the existing deposition of tank interior:
(1) before phosphoric acid precipitates is purged stirring, will there be liquid mediums such as liquid phosphoric acid or the water of certain altitude tank interior sediment top, to guarantee to be purged the state that the sediment that gets up can keep being suspended in liquid internal that stirs.
(2) start air compressor, storing compressed air in compressed air reservoir.
(3) adjusting tank body top is installed in main running gear 52 on the frame, assembly pulley horizontal movement system 51 and the purging shower nozzle of hanging and moves up and down system's 53 each handwheel; Position about making the purging shower nozzle that is suspended on tank interior near deposition object 200-300mm (, purge shower nozzle during adjustment and touch phosphoric acid precipitates also it doesn't matter) if this position should not be observed.
(4) open magnetic valve and hand threshold switch on the compressed-air line; At this moment will spray stirring downwards with the shape of covering of the fan through purging the stirring shower nozzle from the compressed air in the compressed air reservoir, make the phosphoric acid sediment of below blown away and be suspended in the liquid phosphoric acid by a large amount of compressed air.
(5) along with the be blown away expansion of rear space of shower nozzle below sediment, adjust the position of shower nozzle downwards, also can be according to internal precipitate is purged the adjustment that the actual conditions that stir done horizontal direction, carry out this and be operated to and be purged to tank base.
(6) after purging is stirred to tank base, if desired tank interior liquid is discharged, open the sour pump of going out of storage tank and get final product; As need not efflux; Be adjusted to the position about tank base 800mm with purging the stirring shower nozzle; The purging state that keeps each shower nozzle; Blind controller system also capable of using carries out timing and divides into groups to purge stirring, and each shower nozzle can carry out the adjustment of horizontal level in co-altitude, to prevent the sedimentary generation of tank base.
Prevent that tank interior from producing the method for deposition:
(1) starts air compressor, storing compressed air in compressed air reservoir.
(2) regulate tank body top and be installed on the main suspension frame running gear 52, assembly pulley horizontal movement system 51 and purge shower nozzle and move up and down system's 53 each handwheel, the purging shower nozzle that is suspended on tank interior is adjusted at the position apart from about the tank base 800-1000mm.
(3) open magnetic valve and hand threshold switch on the compressed-air line; The purging state that keeps each shower nozzle; Blind controller system also capable of using carries out timing and divides into groups to purge stirring, after each shower nozzle tank interior is adjusted the optimum height position, when normal the use, generally need not carry out the adjustment of upper-lower position to shower nozzle; Can get final product according to actual conditions are carried out horizontal level in the bottom adjustment, to prevent the generation of tank base sediment of phosphoric acid slag thing.
Above-mentioned explanation is specifying to the feasible embodiment of the present invention; And this embodiment is not in order to limit claim of the present invention; Allly do not break away from the equivalence that technical spirit of the present invention done and implement or change, for example adopt different actions mechanism, all should be contained in the claim that the application asked for protection with the manual embodiment of automatic replacement.
Claims (9)
1. removable air stirring system that is used to prevent and clears up sediment of phosphoric acid slag in tank; It is characterized in that: along diametric(al) one jump stay is set on the tank skin top; Movably assembly pulley is installed on jump stay, and the drag-line through assembly pulley and vertical direction will be connected with compressed-air actuated purging shower nozzle and be suspended on tank interior and realize purging; Through the circumferential position of adjustment jump stay, the horizontal level of assembly pulley and the position of purging shower nozzle vertical direction, realize purging shower nozzle and move in the optional position of tank interior;
Said jump stay two ends are installed on main suspension frame, the secondary suspension frame through pulley, and said main suspension frame is installed on the tank skin top with secondary suspension frame, lays respectively at the two ends of jar diameter; Said main suspension frame is equipped with and can moves up and down system along running gear, assembly pulley horizontal movement system and the purging shower nozzle that tank skin moves; Be equipped with on the said secondary suspension frame running gear that can move along tank skin and with the corresponding assembly pulley horizontal movement system of main suspension frame.
2. removable air stirring according to claim 1 system, it is characterized in that: said jump stay is many, many group assembly pulleys and the corresponding shower nozzles that purge is installed on every.
3. removable air stirring according to claim 1 system is characterized in that: the two-position switch magnetic valve is installed on the air inlet pipeline of said purging shower nozzle, is carried out SECO through the instrument automatic control system, realize that regularly the subregion purges to stir.
4. removable air stirring according to claim 2 system is characterized in that: said running gear, assembly pulley horizontal movement system and purge the shower nozzle system that moves up and down and all adopt U.S. mark bevel gear as transmission mechanism.
5. according to described any the removable air stirring system of claim 1-4, it is characterized in that: along said tank skin periphery fitting operation platform, berm width is 1200-1500mm, and height and position is 1000-1100mm apart from the tank body top.
6. according to described any the removable air stirring system of claim 1-4, it is characterized in that: system's inner metal component adopts stainless steel 316L or UB6 material; Non-metallic component adopts nylon, polypropylene or high-molecular polythene material.
7. according to described any the removable air stirring system of claim 1-4, it is characterized in that: said drag-line all adopts the high-molecular polythene hawser.
8. according to described any the removable air stirring system of claim 1-4, it is characterized in that: for the pipeline that purges the shower nozzle air feed is band netting twine plastics compressed-air lines.
9. according to described any the removable air stirring system of claim 1-4, it is characterized in that: said assembly pulley has adopted three fixed pulley structural designs, the horizontal level that is used for realizing assembly pulley respectively with purge moving of shower nozzle vertical direction position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101759868A CN101816904B (en) | 2010-05-19 | 2010-05-19 | Movable air stirring system for preventing and clearing away sediment of phosphoric acid slag in tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101759868A CN101816904B (en) | 2010-05-19 | 2010-05-19 | Movable air stirring system for preventing and clearing away sediment of phosphoric acid slag in tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101816904A CN101816904A (en) | 2010-09-01 |
| CN101816904B true CN101816904B (en) | 2012-05-09 |
Family
ID=42652269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101759868A Expired - Fee Related CN101816904B (en) | 2010-05-19 | 2010-05-19 | Movable air stirring system for preventing and clearing away sediment of phosphoric acid slag in tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101816904B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107376717A (en) * | 2017-07-17 | 2017-11-24 | 徐孟涛 | A kind of pharmaceutical purpose batch tank |
| CN110102541A (en) * | 2019-06-10 | 2019-08-09 | 福建省中瑞装备制造科技有限公司 | A kind of cement bunker high-efficiency cleaning system |
| CN114031210B (en) * | 2021-10-25 | 2023-06-13 | 神美科技有限公司 | Treatment equipment and treatment process for desulfurization wastewater of power plant |
| CN114294759B (en) * | 2021-12-31 | 2023-03-21 | 苏州安新环保工程有限公司 | Indoor formaldehyde removal cleaner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2267851Y (en) * | 1996-05-30 | 1997-11-19 | 任中兴 | Air purging type micro-filter |
| EP1054752A1 (en) * | 1998-03-09 | 2000-11-29 | System Hygienics Limited | A method of cleaning the inside surface of ducts |
| CN1367713A (en) * | 1998-12-15 | 2002-09-04 | 高级技术材料公司 | Apparatus and method for point-of-use treatment of effluent gas streams |
| CN2869591Y (en) * | 2005-11-10 | 2007-02-14 | 上海巴柯科技发展有限公司 | Jet-bed air-water combined sluge-cooling apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2870763B1 (en) * | 2004-05-26 | 2007-08-10 | Airbus France Sas | DRILLING DEVICE AND DRILLING METHOD USED BY SUCH A DEVICE |
-
2010
- 2010-05-19 CN CN2010101759868A patent/CN101816904B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2267851Y (en) * | 1996-05-30 | 1997-11-19 | 任中兴 | Air purging type micro-filter |
| EP1054752A1 (en) * | 1998-03-09 | 2000-11-29 | System Hygienics Limited | A method of cleaning the inside surface of ducts |
| CN1367713A (en) * | 1998-12-15 | 2002-09-04 | 高级技术材料公司 | Apparatus and method for point-of-use treatment of effluent gas streams |
| CN2869591Y (en) * | 2005-11-10 | 2007-02-14 | 上海巴柯科技发展有限公司 | Jet-bed air-water combined sluge-cooling apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101816904A (en) | 2010-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101816904B (en) | Movable air stirring system for preventing and clearing away sediment of phosphoric acid slag in tank | |
| CN202768493U (en) | Mechanical seal cooling system | |
| CN103114177A (en) | Gas-blowing and slag-gathering spray gun for assisting slag-off of molten iron and using method of spray gun | |
| CN207243625U (en) | Spinning and weaving workshop dyeing waste processing unit | |
| CN205055524U (en) | Anti - washing unit | |
| CN205362240U (en) | Off -line cold rolled steel strip sweeps device | |
| CN204265790U (en) | The device of converter platform and slag car duplex technique | |
| CN111036434A (en) | Automatic spraying system of windproof net | |
| CN207294503U (en) | A kind of biochemistry pool | |
| CN103215404B (en) | Molten iron pretreatment apparatus and method thereof | |
| CN214050718U (en) | Material leakage prevention and sieve plate weld seam welding device for high-speed filter | |
| CN212369950U (en) | Hydraulic stirring system for ammonia flue gas desulfurization | |
| CN104208955A (en) | Deduster provided with underlying blowing system and capable of clearing away ashes offline without offline valve | |
| CN208436828U (en) | Salt refining reaction vessel | |
| CN206089036U (en) | Reduce supporting device of depositing sulphur in molten sulfur pond | |
| CN202915339U (en) | Water-saving energy-saving device of converter heat recovery boiler | |
| CN207478199U (en) | A kind of delivery ore vehicle dedusting environment friendly system | |
| CN205308666U (en) | Spray coating device | |
| CN205965363U (en) | Combustible gas recovery system's water seal water washing device | |
| CN220520542U (en) | Steel grade gas content control equipment | |
| CN112620232A (en) | Process method for reducing scaling of acid regeneration ferrous chloride washing tower filler | |
| CN207582575U (en) | A kind of novel environment friendly water tank | |
| CN204395920U (en) | A kind of oxidation tank device | |
| CN209613468U (en) | A kind of sour de-oiling slot regulating device of aluminium alloy full-automatic spraying | |
| CN221051635U (en) | Intelligent workshop sewage environmental protection processing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20130519 |