CN202625910U - Lime feeding device - Google Patents
Lime feeding device Download PDFInfo
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- CN202625910U CN202625910U CN 201220320640 CN201220320640U CN202625910U CN 202625910 U CN202625910 U CN 202625910U CN 201220320640 CN201220320640 CN 201220320640 CN 201220320640 U CN201220320640 U CN 201220320640U CN 202625910 U CN202625910 U CN 202625910U
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- silo
- feeding machine
- throwing device
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Abstract
The utility model discloses a lime feeding device. The lime feeding device comprises a lime silo and a feeding machine, wherein the lime silo is composed of a lime silo cylindrical section, a lime silo transition section and a lime silo conical-bucket section, and the feeding machine is connected with the bottom of the lime silo conical-bucket section. An included angle of the silo wall of the lime silo conical-bucket section and the horizontal direction is no less than 65 degrees and less than 90 degrees, the number of feeding spirals of the feeding machine is no less than 2, two adjacent feeding spirals rotate at the same speed along opposite directions, and the spirals are arranged in staggered and overlapped mode. A hole shaking system is arranged on the outer wall of the lime silo conical-bucket section, and a hole material position detection switch is further arranged on the feeding machine. By means of the lime feeding device, the problems that an existing lime feeding device frequently jams, lime is unevenly fed, one time big lime blocks are feed, one time small lime blocks are fed, and holes are prone to exist in the feeding process are fundamentally resolved, accuracy and continuity of lime feeding are improved, and therefore quality of water flowing out from a whole system is guaranteed, operation cost is lowered, and production safety performance is enabled to be greatly improved.
Description
Technical field
The utility model belongs to water-treatment technology field, particularly carries out the lime throwing device of city reuse water (middle water) reuse advanced treatment system.
Background technology
China is the country of a water resources critical shortage, and it is extremely uneven to distribute.There are nearly 300 urban water shortages in the whole nation at present, and more than 100 serious water shortage wherein arranged, and mainly occurs in North China, East China, northwest and coastland.Water shortage problem is quite serious, and water resources has become the key factor of restriction industrial and agricultural development and people's lives.By normal need, under the situation of its excessive exploitation of groundwater not, the lack of water total amount is about 30,000,000,000 m
3To 40,000,000,000 m
3, the direct economic loss that causes because of lack of water possibly reach several hundred billion yuan every year.
The fuel-burning power plant is the water rich and influential family, and thermal power station whenever builds 10000MW, needs water 8～10m
3/ s.Gw is roughly equal to 14～1,800,000,000 m
3/ a; Wherein recirculated water accounts for 60 ~ 80% of total water consumption; So no matter big water consumption is groundwater abstraction or the water intaking from the river, and cost is all very big.
Produce on the one hand and life serious water shortage, a large amount of on the other hand municipal effluents and industrial sewage run off again in vain, have both polluted environment, have wasted resource again.Municipal effluent is to solve shortage of water resources as second kind of water source newly developed, especially solves an effective way of urban water shortage problem, receives each side day by day and payes attention to.Its amount of having is stablized greatly, and cost is lower, and is desirable on the spot, do not need the characteristics of long distance water diversion, can alleviate characteristics such as environmental pollution simultaneously, is a kind of reliable water resources.
Along with the raising of reusing sewage technology, the scope of reuse enlarges gradually, and uses power plant.Western developed country adopts municipal effluent after the processing as the circulating water system source in fuel-burning power plant in a large number in more than ten years in the past, even as the boiler feedwater water source, has obtained good economic benefit and social benefit.
After municipal effluent is collected, passed through after municipal wastewater treatment system such as coacervating clarification handles, reached " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard, be the city reuse water, or be middle water.This water is back to use industrial enterprise and also will handles according to the water requirement again, is the reuse advanced treatment,
The reclaimed water reuse of China is started late, but because city serious water shortage in recent years, has caused governments at all levels to solving the great attention of shortage of water resources problem, and has quickened city reclaimed water reuse important function for of research and enforcement.Case in the existing successful Application of power system; As the solid power & light company in Huaneng Beijing power & light company, Datang west, Datang head of the horse genco, Datang Linzhou City genco, Datang Sanmenxia Gorge genco etc. all adopted the city reuse water again after the lime advanced treatment as the make up water of thermal power plant's recirculated cooling water, and had preliminary service experience.
In sum, along with the growth and the The development in society and economy of urban population, urban wastewater discharge increases just year by year, and the imbalance between supply and demand of water is outstanding day by day.Under the situation that the reusing sewage technology is gradually improved; Utilizing the reuse water after the municipal sewage treatment or be middle water, be back to suitable production, living system, is feasible from experience both domestic and external; And having become inexorable trend, also is important measures of modern urban construction simultaneously.For the conserve water resource, preserve the ecological environment, keep geographic Sustainable development, it is the approach of waste water reclaiming that the electric power plant circulating water make up water adopts the city reuse water.With the city reuse water through reuse after the advanced treatment, from reality, be to solve one of urban water shortage problem and STRATEGIES OF SUSTAINABLE DEVELOPMENT property countermeasure in the long run.
Critical system in the reclaimed water reuse advanced treatment system of city is the lime dosing system, and operation continuity and metering precision how to resolve the lime dosing system are the focuses that everybody pays close attention to always.
ZL200620124561.3 discloses a kind of many spirals high precision lime throwing device; Comprise: be provided with in the feeding machine and add mechanism; It is characterized in that: the described mechanism that adds is by being at least 2 feed auger; Feed auger drives through power-driven gear, and makes adjacent feed auger speed identical, and rotation direction is opposite and spiral is overlapping; Be provided with inlet flange above the described feeding machine and the bottom is provided with discharge flange, discharge flange is located at the below of feeding machine of end of feed auger or right-hand.It is through one group of rotation that interact to produce the spiral of overlap, produce safety, continuously, stable, add metering and low wearing and tearing, self-cleaning spiral accurately; Can guarantee simultaneously the continuity of charging.
Though above-mentioned many spirals high precision lime throwing device has improved the particularity that adds metering to a certain extent, has guaranteed the continuity of charging, effect is not very desirable.Exist extensively in the reclaimed water reuse advanced treatment system of some power plant of China that the lime adding equipment often stops up, blanking is inhomogeneous, the time little when big, be prone to produce phenomenon such as hole, had a strong impact on the effluent quality of city reclaimed water reuse advanced treatment.
The utility model content
For solving the problems of the technologies described above; The utility model provides a kind of improved lime throwing device; Solved fundamentally that the lime adding equipment often stops up, blanking is inhomogeneous, the time little when big, be prone to produce the problem in hole, improved lime feed tolerance range and continuity, thereby guaranteed the effluent quality of total system; Reduced running cost, production security is greatly improved.
The utility model solves the problems of the technologies described above the technical scheme that is adopted:
A kind of lime throwing device; Comprise lime silo of forming by lime silo cylindrical section, lime silo transition section and lime silo awl bucket section and a feeding machine that is connected with lime silo awl bucket section bottom, the barrel that described lime silo awl struggles against section and the angle of horizontal direction more than or equal to 65 ° less than 90 °; The feed spiral of said feeding machine is at least 2 feed spirals, and the speed of adjacent feed spiral is identical, and rotation direction is opposite and spiral is overlapping; The outer wall of described lime silo awl bucket section is provided with the hole vibrated system, also is provided with hole material-height exploring switch on the described feeding machine.The lime throwing device of present embodiment improves from following three aspects:
(1) for whole lime silo, its key position just is the bottom.Common lime silo is because the bottom adopts the angle of hopper barrel and horizontal direction to be not more than 45 ° feed bin; From material itself, fail to control the hole bridge formation of lime, very easily cause lime in feed bin, to form the hole; Be unfavorable for the lime blanking, cause obstruction through regular meeting.The lime throwing device of the utility model; The hopper section of lime silo bottom is according to the natural properties such as accumulation angle of lime; The angle of employing hopper barrel and horizontal direction is not less than 65 ° feed bin, like this, guarantees the natural blanking of lime powder; Control the hole bridging action of lime effectively, fundamentally solved lime powder blanking blocking problem.
(2) feeding machine of common lime throwing device is the simple helix feeding machine owing to what adopt; Material rotates along with the rotation of spiral; Thereby the powder that is assigned on each screw-blade is inhomogeneous, and promptly the push-in stroke of each blade is different, causes mass transport interrupted; Instability of flow, Measuring Precision is relatively poor.The system that the simple helix feeding machine is set need adopt continuous vibrations feed bin vibration blanking, gets into feeding machine again, but young because of going out, and very easily forms the hole and stops up.In addition, adopt shake dnockout storehouse vibrations blanking continuously, it is real more to be easy to cause material to be pressed more, and variation has taken place tap density, causes feed low precision and inhomogeneous.
In the lime throwing device of the utility model, the feed spiral is at least 2 feed spirals, and the speed of adjacent feed spiral is identical, and rotation direction is opposite and spiral is overlapping.Like this, after lime powder gets into feeding machine from the blanking of lime silo nature, because every pair of spiral sense of rotation is on the contrary to form a mass transport district between spiral.The mass transport district is the overlap of a pair of screw-blade, and material evenly moves toward outlet in feeding machine.These characteristics can be guaranteed the accurate volume metering of mass transport.Simultaneously, can also guarantee to be positioned at that material in the feed bin on the feeding machine is full of the entrance width of whole feeding machine and even feeding is difficult for forming the hole, thereby has reduced the risk that material is built bridge in feed bin, thereby guaranteed feed tolerance range and continuity.
(3) the common lime throwing device is because of the mode blanking of the continuous vibrations blanking of blanking employing, and this mode not only can not effectively be removed the hole, and it is real more that material is pressed more; Variation has taken place in tap density; Thereby cause the lime Measuring Precision very poor, also guaranteed not homogeneity and continuity that lime is carried, little when big during the blanking amount; Fluctuation of service, power consumption is high.The lime throwing device of the utility model is provided with the hole vibrated system at the outer wall of lime silo awl bucket section; Feeding machine is provided with hole material-height exploring switch; Monitor the start and stop of feed bin hole vibrated system with this; There is the hole to form in the feeding machine in case detect; Show also to have occurred the hole in the lime silo, will start the hole vibrated system of lime silo awl bucket section automatically, the work of hole vibrated system runs to hole material-height exploring switch in proper order always and detects the hole and be disengaged (rear portion that is feeding machine is full of lime again).After eliminated in the hole, hole vibrated system 2 stopped at once, reliable operation, and power consumption is extremely low.
Preferred 69 ° of the barrel of described lime silo awl bucket section and the angle of horizontal direction.
As a kind of preferred version of the utility model, the upper shed center of circle of described lime silo awl bucket section and the line in the lower opening center of circle and the angle of vertical direction are 0～10 °, preferred 5～10 °.
Described feeding machine top is provided with powder inlet and the bottom is provided with meal outlet, and the bottom of powder inlet and lime silo awl bucket section communicates, and meal outlet is located at end right-hand of the feed spiral of feeding machine.
The two ends of the axle of described feed spiral are connected with feeding machine through bearing.
Described hole material-height exploring switch is located at the left of the powder inlet of feeding machine.
Described hole vibrated system is pneumatic vibrated system.
Described pneumatic vibrated system comprises that air rapping disc, air rapping connect source of the gas pipe and air rapping gas-holder, and described air rapping disc connects the outer wall that the source of the gas pipe is located at lime silo awl bucket section through described air rapping.
The beneficial effect of the utility model is: the lime throwing device of the utility model has solved the shortcoming of original lime throwing device, guarantees the natural blanking of lime powder, has controlled the hole bridging action of lime effectively; Fundamentally solved lime powder blanking blocking problem; Improve lime feed tolerance range and continuity greatly, guaranteed the effluent quality of lime treatment system, reduced running cost; Production security is greatly improved
Description of drawings
Specify below in conjunction with the lime throwing device of accompanying drawing the utility model.
Fig. 1 is the structural representation of embodiment one said lime throwing device;
Fig. 2 is the synoptic diagram of the feeding machine of embodiment one said lime throwing device;
Fig. 3 is the synoptic diagram of the feeding machine of the utility model lime throwing device;
Fig. 4 is the synoptic diagram of the air vibrated system of embodiment one said lime throwing device;
Fig. 5 is that the air vibrated system of embodiment one said lime throwing device is provided with position view;
Fig. 6 is the structural representation of embodiment two said lime throwing devices;
Fig. 7 is the A-A ' cross-sectional view of Fig. 6;
Wherein:
1---the lime silo; 2---the hole vibrated system; 3---feeding machine; 4---lime silo cylindrical section; 5---lime silo transition section; 6---lime silo awl bucket section; 7---powder inlet; 8---meal outlet; 9---hole material-height exploring switch; 10---the feed spiral; 11---air rapping disc; 12---the air rapping connects the source of the gas pipe; 13---air rapping gas-holder; 14---bearing.
Embodiment
Embodiment one
Below in conjunction with accompanying drawing the described a kind of lime throwing device of the utility model is carried out detailed explanation; This lime throwing device; Comprise lime silo of forming by lime silo cylindrical section 4, lime silo transition section 5 and lime silo awl bucket section 61 and the feeding machine 3 that is connected with lime silo awl bucket section 6 bottoms; The barrel of described lime silo awl bucket section 6 and the angle of horizontal direction more than or equal to 65 ° less than 90 °, for example can be preferred 69 °; The feed spiral 10 of said feeding machine 3 is at least 2 feed spirals 10, and the speed of adjacent feed spiral 10 is identical, and rotation direction is opposite and spiral is overlapping; The outer wall of described lime silo awl bucket section 6 is provided with hole vibrated system 2, also is provided with hole material-height exploring switch 9 on the described feeding machine 3.Referring to Fig. 1, Fig. 3 and Fig. 7.
The lime throwing device of present embodiment improves from following three aspects:
(1) for whole lime silo, its key position just is the bottom.Common lime silo is because the bottom adopts the angle of hopper barrel and horizontal direction to be not more than 45 ° feed bin; From material itself, fail to control the hole bridge formation of lime, very easily cause lime in feed bin, to form the hole; Be unfavorable for the lime blanking, cause obstruction through regular meeting.The lime throwing device of the utility model; The hopper section of lime silo bottom is according to the natural properties such as accumulation angle of lime; The angle of employing hopper barrel and horizontal direction is not less than 65 ° feed bin, like this, guarantees the natural blanking of lime powder; Control the hole bridging action of lime effectively, fundamentally solved lime powder blanking blocking problem.
(2) feeding machine of common lime throwing device is the simple helix feeding machine owing to what adopt; Material rotates along with the rotation of spiral; Thereby the powder that is assigned on each screw-blade is inhomogeneous, and promptly the push-in stroke of each blade is different, causes mass transport interrupted; Instability of flow, Measuring Precision is relatively poor.The system that the simple helix feeding machine is set need adopt continuous vibrations feed bin vibration blanking, gets into feeding machine again, but young because of going out, and very easily forms the hole and stops up.In addition, adopt shake dnockout storehouse vibrations blanking continuously, it is real more to be easy to cause material to be pressed more, and variation has taken place tap density, causes feed low precision and inhomogeneous.
In the lime throwing device of the utility model, the feed spiral is at least 2 feed spirals 10, and the speed of adjacent feed spiral 10 is identical, and rotation direction is opposite and spiral is overlapping.Like this, after lime powder gets into feeding machine from the blanking of lime silo nature, because every pair of spiral sense of rotation is on the contrary to form a mass transport district between spiral.The mass transport district is the overlap of a pair of screw-blade, and material evenly moves toward outlet in feeding machine.These characteristics can be guaranteed the accurate volume metering of mass transport.Simultaneously, it can also guarantee to be positioned at that material in the feed bin on the feeding machine can be full of the entrance width of whole feeding machine and even feeding is difficult for forming the hole, thereby has reduced the risk that material is built bridge in feed bin, thereby guaranteed feed tolerance range and continuity.
(3) the common lime throwing device is because of the mode blanking of the continuous vibrations blanking of blanking employing, and this mode not only can not effectively be removed the hole, and it is real more that material is pressed more; Variation has taken place in tap density; Thereby cause the lime Measuring Precision very poor, also guaranteed not homogeneity and continuity that lime is carried, little when big during the blanking amount; Fluctuation of service, power consumption is high.The lime throwing device of the utility model is provided with hole vibrated system 2 at the outer wall of lime silo awl bucket section 6; Feeding machine 3 is provided with hole material-height exploring switch 9; Monitor the start and stop of feed bin hole vibrated system with this; There is the hole to form in the feeding machine 3 in case detect; Show also to have occurred the hole in the lime silo 1, will start the hole vibrated system 2 of lime silo awl bucket section 6 automatically, the work of hole vibrated system 2 runs to hole material-height exploring switch 9 in proper order always and detects the hole and be disengaged (rear portion that is feeding machine 3 is full of lime again).After eliminated in the hole, hole vibrated system 2 stopped at once, reliable operation, and power consumption is extremely low.
Described feeding machine 3 tops are provided with powder inlet 7 and are provided with meal outlet 8 with the bottom, and the bottom of powder inlet 7 and lime silo awl bucket sections 6 communicates, and meal outlet 8 is located at end right-hand of the feed spiral 10 of feeding machine 3.The two ends of the axle of described feed spiral 10 are connected with feeding machine 3 through bearing 14.Referring to Fig. 2.
Described hole material-height exploring switch 9 is located at the left of the powder inlet 7 of feeding machine 3.Referring to Fig. 2.
Described hole vibrated system 2 is pneumatic vibrated system.
Described pneumatic vibrated system comprises that air rapping disc 11, air rapping connect source of the gas pipe 12 and air rapping gas-holder 13, and described air rapping disc 11 connects the outer wall that source of the gas pipe 12 is located at lime silo awl bucket section 6 through described air rapping.Referring to 4 and Fig. 5.
In the lime throwing device of present embodiment, the concrete set-up mode that a plurality of feed spirals are set can be referring to the set-up mode of a plurality of feed auger in Chinese patent ZL200620124561.3, the date of declaration disclosed many spirals high precision lime throwing device on August 15th, 2007.
The lime throwing device of the utility model can guarantee the natural blanking of lime powder, has controlled the hole bridging action of lime effectively, has fundamentally solved lime powder blanking blocking problem.
Embodiment two
Present embodiment further is located at the angle of the line in the upper shed center of circle of lime silo awl bucket section 6 and the lower opening center of circle and vertical direction in 0～10 ° the scope on the basis of the structure of the lime throwing device of embodiment one; Preferred 5～10 °, when selecting this preferable range, the barrel of lime silo awl bucket section 6 one sides and the angle of horizontal direction will be different from the barrel of opposite side and the angle theta of horizontal direction; Can a side it be 69 °; Opposite side is 76 °, and like Fig. 6 and shown in Figure 7,6 of lime silo awl bucket sections form a upper shed center of circle and the eccentric tiltedly hopper shape of lower opening center of circle out-of-alignment like this; Adopt eccentric tiltedly hopper can improve the geometrical shape of hopper; The uneven transverse force of balance silo on the level cross-sectionn coordinated the whole discharging of silo and gravity flow each other, reduces the formation probability of arch camber or bridge formation.
Other technical characterictic is identical with embodiment one in the present embodiment.
Claims (9)
1. lime throwing device; Comprise lime silo of forming by lime silo cylindrical section (4), lime silo transition section (5) and lime silo awl bucket section (6) (1) and a feeding machine (3) that is connected with lime silo awl bucket section (6) bottom, it is characterized in that: described lime silo awl struggle against the angle of barrel and horizontal direction of section (6) more than or equal to 65 ° less than 90 °; The feed spiral (10) of said feeding machine (3) is at least 2 feed spirals (10), and the speed of adjacent feed spiral (10) is identical, and rotation direction is opposite and spiral is overlapping; The outer wall of described lime silo awl bucket section (6) is provided with hole vibrated system (2), also is provided with hole material-height exploring switch (9) on the described feeding machine (3).
2. lime throwing device according to claim 1 is characterized in that: the barrel of described lime silo awl bucket section (6) and the angle of horizontal direction are 69 °.
3. lime throwing device according to claim 1 and 2 is characterized in that: the upper shed center of circle of described lime silo awl bucket section (6) and the line in the lower opening center of circle and the angle of vertical direction are 0～10 °.
4. lime throwing device according to claim 3 is characterized in that: the upper shed center of circle of described lime silo awl bucket section (6) and the line in the lower opening center of circle and the angle of vertical direction are 5～10 °.
5. lime throwing device according to claim 1 and 2; It is characterized in that: described feeding machine (3) top is provided with powder inlet (7) and the bottom is provided with meal outlet (8); The bottom of powder inlet (7) and lime silo awl bucket section (6) communicates, and meal outlet (8) is located at end right-hand of the feed spiral (10) of feeding machine (3).
6. lime throwing device according to claim 1 and 2 is characterized in that: the two ends of the axle of described feed spiral (10) are connected with feeding machine (3) through bearing (14).
7. lime throwing device according to claim 5 is characterized in that: described hole material-height exploring switch (9) is located at the left of the powder inlet (7) of feeding machine (3).
8. lime throwing device according to claim 1 and 2 is characterized in that: described hole vibrated system (2) is pneumatic vibrated system.
9. lime throwing device according to claim 8; It is characterized in that: described pneumatic vibrated system comprises that air rapping disc (11), air rapping connect source of the gas pipe (12) and air rapping gas-holder (13), and described air rapping disc (11) connects the outer wall that source of the gas pipe (12) is located at lime silo awl bucket section (6) through described air rapping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320640 CN202625910U (en) | 2012-07-03 | 2012-07-03 | Lime feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320640 CN202625910U (en) | 2012-07-03 | 2012-07-03 | Lime feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202625910U true CN202625910U (en) | 2012-12-26 |
Family
ID=47379130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220320640 Expired - Lifetime CN202625910U (en) | 2012-07-03 | 2012-07-03 | Lime feeding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202625910U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784060A (en) * | 2014-12-26 | 2016-07-20 | 中核建中核燃料元件有限公司 | Material level detection device and method for uranium dioxide powder |
| CN111087183A (en) * | 2018-10-22 | 2020-05-01 | 上海城投污水处理有限公司 | Lime device with pneumatic blowback equipment |
-
2012
- 2012-07-03 CN CN 201220320640 patent/CN202625910U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784060A (en) * | 2014-12-26 | 2016-07-20 | 中核建中核燃料元件有限公司 | Material level detection device and method for uranium dioxide powder |
| CN111087183A (en) * | 2018-10-22 | 2020-05-01 | 上海城投污水处理有限公司 | Lime device with pneumatic blowback equipment |
| CN111087183B (en) * | 2018-10-22 | 2024-04-12 | 上海城投污水处理有限公司 | Lime device with pneumatic back blowing equipment |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee after: DATANG ENVIRONMENT INDUSTRY GROUP Co.,Ltd. Address before: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee before: DATANG TECHNOLOGY INDUSTRY GROUP CO.,LTD. Address after: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee after: DATANG TECHNOLOGY INDUSTRY Co.,Ltd. Address before: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee before: CHINA DATANG GROUP ENVIRONMENT TECHNOLOGY CO.,LTD. Address after: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee after: DATANG TECHNOLOGY INDUSTRY GROUP CO.,LTD. Address before: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee before: DATANG TECHNOLOGY INDUSTRY Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |