EP2347183A2 - Procédé et dispositif d'évacuation de matière à partir d'une chaudière de combustion - Google Patents

Procédé et dispositif d'évacuation de matière à partir d'une chaudière de combustion

Info

Publication number
EP2347183A2
EP2347183A2 EP09740143A EP09740143A EP2347183A2 EP 2347183 A2 EP2347183 A2 EP 2347183A2 EP 09740143 A EP09740143 A EP 09740143A EP 09740143 A EP09740143 A EP 09740143A EP 2347183 A2 EP2347183 A2 EP 2347183A2
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
directional component
combustion boiler
housing
horizontal
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.)
Granted
Application number
EP09740143A
Other languages
German (de)
English (en)
Other versions
EP2347183B1 (fr
Inventor
Rafael Moreno Rueda
Jeff Hudson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clyde Bergemann DRYCON GmbH
Original Assignee
Clyde Bergemann DRYCON GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Clyde Bergemann DRYCON GmbH filed Critical Clyde Bergemann DRYCON GmbH
Publication of EP2347183A2 publication Critical patent/EP2347183A2/fr
Application granted granted Critical
Publication of EP2347183B1 publication Critical patent/EP2347183B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/06—Mechanically-operated devices, e.g. clinker pushers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01002—Cooling of ashes from the combustion chamber by indirect heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01007—Thermal treatments of ash, e.g. temper or shock-cooling for granulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01009—Controls related to ash or slag extraction

Definitions

  • the present invention relates to an apparatus and a method for conveying material from a combustion boiler.
  • the invention finds particular use in installations with at least one combustion boiler, for example plants for burning fossil fuels and / or waste incineration plants.
  • the invention also relates to a corresponding plant with at least one combustion boiler and a device arranged below the combustion boiler.
  • the conveyance of material involves the removal of slag, ash or incineration residues, which are referred to below as "material.” It is of particular importance, on the one hand, to achieve targeted solidification or solidification of the hot, partially still molten materials. In addition, it is also desirable to use the energy still present in the hot material and thus to improve the overall efficiency of the plant or of the combustion boiler.
  • the conveyor belt After initially assuming that a quench in the water bath is required for the conveyance of the hot materials, which is referred to as "wet discharge", since the 1990s so-called dry exhaust systems have become established In this case, if necessary, an afterburning or a targeted cooling of the hot material takes place, which at least partially also takes place on the conveyor belt.
  • the materials used here, in particular those of the conveyor belt are thus high temperatures, a corrosive Environment and / or high mechanical stresses that they must withstand external environment encapsulated in a housing executed.
  • the conveyor belts have at least one housing, which prevents even in the promotion of the material resulting combustion gases can easily escape into the environment.
  • combustion boilers are operated with a slight negative pressure, so that the combustion gases produced by the material are drawn off by a corresponding suction to the combustion boiler.
  • the combustion gases so sucked into the boiler are also preheated at the same time, so that in addition to the discharge of undesirable combustion gases, the energy efficiency of the combustion boiler can be improved thereby.
  • An energetically useful and with regard to the cooling behavior specially designed trigger device can be taken from EP 0 471 055 Bl. There, it is made clear that it makes sense to cool the hot material in two separate cooling stages with an intermediately stored comminution step for the hot material. In particular, a cooling air flow is to be realized according to the countercurrent principle, which are provided at the end of the second cooling stage and at the end of the first cooling stage. Special effects are explained there with regard to the comminution of the hot material and with regard to the stratification, so that overall an effective operation of the combustion boiler should be made possible.
  • INS particular, a device and a method for the promotion of material from a combustion boiler are specified, which has a particularly low space requirement, is particularly durable and ensures reliable operation with good energy efficiency.
  • the object is achieved by a device for conveying material from a combustion boiler, comprising at least one housing, at least one conveyor belt and at least one deflection device, wherein the conveyor initially conveys the material with a first horizontal direction component and after passing through the deflection with at least one deviating second horizontal directional component promotes, further wherein the material with the first directional component outside the deflection by the housing is always separated from the material with the second directional component and the first directional component and the second directional component form an angle of 135 ° to 180 ° ,
  • first direction component By the removal of the material first in an execution (first direction component) and then in an at least approximately opposite return direction (second direction component), the length of the conveying path of the material can be extended in the housing, and without the same time, the space requirement of the device increases significantly in the horizontal , Compared to known devices, the space requirement can even be significantly reduced with the same conveying length.
  • directional component is also intended to express that here (if only) the projections of the actual conveying directions in the horizontal are considered and compared with each other, the conveyor belts thus possibly also a vertical direction component (up and / or down In this case, only the area "outside" of the deflection device is regularly considered, because in this case the material may possibly be conveyed without a horizontal directional component (ie only in the vertical direction, for example).
  • the device can (preferably) in principle be constructed so that a plurality of conveyor belts are used, for example, in each case one conveyor belt per directional component.
  • a kind of endless conveyor belt can transport the material in different vertically superimposed heights and different horizontal directional components.
  • These conveyor belts are then advantageously arranged vertically one above the other and have at least a partial overlap in the vertical direction to each other.
  • the second directional component corresponds, for example, exactly to the opposite first conveying direction.
  • the angle is close to 180 °, e.g. also greater than 165 °. It is also clear that these angles only consider one direction of rotation, but this direction of rotation (right or left) can be freely selected starting from the first direction component.
  • the horizontal conveyor belts essentially require a significantly smaller parking space than the sum of the individual parking spaces for each partial conveying path or conveyor.
  • the conveyor belts overlap, so are e.g. arranged in the manner of floors (partially) on top of each other, which is here not regularly (only) for the transfer area or the area of the deflection.
  • the entire conveying path forming housing is regularly provided.
  • the housing forms a separate housing chamber for each conveyor belt, so that, for example, each conveyor belt is surrounded by the housing.
  • the housing may, for example, have a meandering shape, wherein a conveyor belt is located in the horizontal sections and a deflection device is located in the lateral connecting sections.
  • the at least one conveyor belt is arranged overlapping in a central region of a directional component.
  • a device for conveying material from a combustion boiler in which a single housing, at least two conveyor belts and at least one deflecting device is provided, is thus particularly preferred, wherein the first conveyor belt first conveys the material with a first horizontal directional component and after passing through the deflection device, the second conveyor belt promotes the material with at least one deviating second horizontal whilskomponen- te and the conveyor belts thereby overlap in their central areas.
  • central area is meant, in particular, a partial area of the conveyor belt which covers the central portion of the conveyor belt, ie where (exactly) the conveyor belts are overlapped, in which case, for example, the conveyor belts can be arranged in an intersecting manner.
  • the first directional component and the second directional component likewise preferably span an angle of 135 ° to 180 °.
  • a third promotion in the vertical direction is preferably carried out substantially in the vertical direction, for example by funnel-shaped guides or in the simplest case in the vertical free fall.
  • the third promotion for example, a band change from a first conveyor belt to a second conveyor belt done.
  • the term "conveying" is used in particular for part of the conveying path of the material in the housing.
  • the device is enclosed by a housing which at least includes specifically provided inlet and outlet openings for the cooling air and otherwise has the impermeability required for the guidance of air masses.
  • fresh air can be specifically aspirated into the housing via the inlet opening and can be selectively delivered to an outlet opening, for example to a combustion boiler connected thereto.
  • the prevailing in the combustion boiler vacuum can be used.
  • the rest of the housing should be made substantially airtight, so that no unwanted false air is sucked into the housing.
  • Inlets for the air may e.g. be provided near an end portion of a conveyor belt and / or below a conveyor belt, e.g. the provided below the conveyor belt inlet openings may also be fed to a separate cooling system for the drive elements of the conveyor belt (chain, rollers, etc.).
  • At least one additional cooling device is provided on the device.
  • This cooling device can in particular supply air or water for cooling in the housing.
  • the cooling device comprises at least one cooling air inlet for the controlled supply of cooling air.
  • the cooling air inlets or in combination but can also spray nozzles for controlled supply of water can be used as a cooling medium. If necessary, so the material to be conveyed can be cooled by air or water, for example, to avoid damage to the conveyor belts, deflection and / or subsequent conveyors due to high temperatures.
  • the flow direction of the incoming cooling air can be controlled via the cooling air inlets, so that it is passed to the particularly strongly heated points in a controlled manner.
  • a comminution device is provided in the device in the course of the conveyance.
  • This comminution device may preferably be arranged on or in a deflection device and provide for the comminution of oversized pieces of material.
  • counter-rotating crusher rolls can be used.
  • the conveying path length is the total path length traveled by a material from the outlet opening located on the combustion boiler to the opposite inlet opening in the housing.
  • this conveying path length can be varied if the deflecting device is designed such that it, for example, forwards the material from a first conveyor belt, bypassing a second conveyor belt, directly to a third conveyor belt provided.
  • the material can optionally pass through all three conveyor belts or alternatively, for example, only the first and third conveyor belt. If the material has particularly high temperatures, it makes sense to lengthen the conveying path length and to carry out a further cooling of the material.
  • a plant with at least one combustion boiler and a device arranged below the combustion boiler which comprises at least one conveyor belt and at least one deflecting device, wherein the device is formed in the aforementioned manner according to the invention.
  • the housing is connected, for example, to the bottom openings of the combustion boiler, so that the hot material can be deposited therefrom onto the first conveyor belt, whereby flaps and / or grilles can be arranged therebetween to perform a specific task according to size and / or or quantity is reached.
  • a cooling air flow through the housing by means of a working with negative pressure combustion boiler can be realized.
  • a plurality of conveyor belts or a meandering conveying path may be formed below the combustion boiler or below the bottom openings of the combustion boiler, so that a long cooling section is realized in a particularly small space.
  • At least one measuring device is provided on the housing or therein.
  • at least one sensor for determining at least one of the following parameters inside the housing can be considered as measuring devices: temperature, humidity, carbon monoxide, carbon dioxide, oxygen, thermal radiation or density of the conveyed material.
  • a plurality of (different) sensors can be arranged along the conveying path length. For example, a measured value for determining the required conveying path length can already be detected with a single temperature measuring device, for example at the inlet opening or the outlet opening.
  • control device which is connected to control technology at least with the measuring device or the deflection device.
  • the controller may also act on both devices.
  • the control device can, for example, due to corresponding pro- carry out control measures on the system on the basis of the input quantity supplied by the measuring device.
  • a control measure can, for example, represent the activation or alignment of the deflection device.
  • the method according to the invention for removing a material from a combustion boiler comprises at least the following steps: a) producing a hot material by burning a fuel in the combustion boiler; b) conveying the material with a first horizontal directional component with a conveyor belt; c) deflecting the material at least once by means of a deflection device; d) conveying the material with a second horizontal directional component with a conveyor belt, the material after step b) being kept separate from the material after step 4 and the horizontal directional components being selected to span an angle of 135 ° to 180 °.
  • These are, for example, the directional components of two successive conveyor belts, in which case the substantially vertical conveyance in the deflecting device from one belt to another belt can be disregarded.
  • the number of deflections by means of the deflection device is determined and carried out as a function of at least one measured variable.
  • the measured variable represents a parameter of the material to be conveyed and / or the environment in the housing, such. As temperature, humidity, carbon monoxide, carbon dioxide, oxygen, heat radiation and / or density of the subsidized material.
  • Fig. 1 a side view of a first system according to the invention
  • FIG. 2 shows a side view of a second system according to the invention
  • FIG. 3 shows a side view of a third system according to the invention
  • Fig. 4 is a plan view of the inventive system of FIG. 1;
  • FIG. 5 shows a plan view of a fourth embodiment of a system according to the invention.
  • a first preferred embodiment of a device 1 according to the invention is shown in a lateral schematic view.
  • the device 1 is arranged below a combustion boiler 2, in which a fuel, for example. Waste and / or a fossil fuel such as coal, is burned.
  • the device 1 shown in Fig. 1 consists of a first conveyor belt 6 and a second conveyor belt 7 and a deflecting device 8.
  • the on the bottom (via bottom openings) of the combustion boiler 2 emerging material 5 passes through an outlet opening 9 on the first conveyor belt 6.
  • the deflection device 8 is particularly easily formed by a chute.
  • the material has first been conveyed on the conveyor belt 6 with a first horizontal direction component 11, it is then conveyed on the second conveyor belt 7 in the direction of the second arrow 12 with a second horizontal direction component 13. While the first horizontal directional component 11 in FIG. 1 points to the right both in the horizontal section of the conveyor belt 1 and in the inclined section, the second horizontal directional component 13 in this figure is directed to the left (ie opposite to an angle of 180 ° ).
  • the material 5 is additionally conveyed with a vertical direction component 14 corresponding to the third arrow 15.
  • the sum of the delivery lengths of the first conveyor belt 6, the second conveyor belt 7 and the drop height in the deflection device 8 result in a conveying path length.
  • the conveyance along this beneficiawegmother can be done by means of a single conveyor belt or several separate conveyor belts.
  • the promotion of the material 5 over the beneficiawegmother is realized by means of three promotions.
  • the first promotion 16 takes place with the first conveyor belt 6.
  • the second promotion 17 takes place with the second conveyor belt 7.
  • the third promotion 18 forms the promotion with vertical direction component 14 within the deflection 8.
  • a measuring device 21 is provided, which is connected via a measuring line 22 to a control device 23.
  • the measuring device 21 is designed as a temperature sensor, which is arranged near the outlet opening 9.
  • the control device 23 shown the temperature near the outlet opening 9 can now be monitored in order to avoid excessive temperatures within a housing 24 which would damage the conveyor belts 6, 7. If, for example, temperatures are too high, cool outside air in the direction of the fifth arrows 26 can be introduced into the housing 24 in a targeted manner via a cooling device 25 in order to cool the conveyor belts 6, 7 located therein.
  • cooling air inlets 27 are provided which can be actuated individually or jointly.
  • FIG. 1 of the removal of the material 5 in at least two heights lying one above another in the vertical direction makes it possible to provide a device 1 or a system 3 which has particularly small spatial dimensions. Despite the small dimensions, however, a sufficiently large conveying path length can be provided at the same time in order to ensure a cooling of the material 5 and a sufficient warming up of the inflowing air quantities.
  • the at least partially arranged in the vertical direction conveyor belts 6, 7 are provided in this embodiment with exactly opposite directional components, which thus at an angle of 180 °. Alternatively, however, the advantages stated here can also be achieved with other angle arrangements which are between 90 ° and 180 ° (if an overlap of the individual conveyances in the central area is provided).
  • FIG. 2 a further embodiment of a system is shown.
  • the plant 3 shown there again has a combustion boiler 2, under which the device 1 is arranged.
  • this device 1 additionally has a third conveyor belt 28.
  • the cooling air inlets 27 are connected in this system via a second line 29 to the control device 23, so that they can cause an opening or closing of the cooling air inlets 27, if necessary.
  • the control device 23 is connected via measuring lines 22 to further measuring devices 21, which are arranged in the region of the second conveyor belt 7 and the third conveyor belt 28.
  • these measuring devices can also record parameters such as, for example, the relative humidity or the content of carbon monoxide, carbon dioxide or oxygen.
  • the measuring devices 21 may be arranged, for example, in the region of the inlet opening 19, the outlet opening or along the conveying path length.
  • the device 1 shown in FIG. 2 has a second deflection device 30, at which the material 5 is transferred from the second conveyor belt 7 to the third conveyor belt 28.
  • a shredding device 31 is provided even in the region of the first deflection device 8, which consists of two counter-rotating rollers (here, if necessary, also a single roller can work or any other smasher).
  • the crusher 31 may, if necessary, for. B. in a decreasing air flow, are set by the controller 23 via a control line 29 in operation or taken out of service.
  • the advantage of particularly small size is realized with very long votingwegept for the removal of the material 5. This advantage is achieved by the superimposed arrangement of the conveyors 16, 17, 35, which seen in the vertical direction have an overlap of at least 30%, but preferably at least 50 to 70% of the projected into the horizontal surface of the conveyor belts.
  • a third variant of a system is shown in which in turn below the combustion boiler 2, the entire device 1 is arranged.
  • the device 1 shown here comprises a first conveyor belt 6, a second conveyor belt 7 and a third conveyor belt 28 and the first deflecting device 8 and the second deflecting device 30.
  • the deflecting device 8 is designed so that it can selectively support the material 5 the second conveyor belt 7 or directly to the third conveyor belt 28 can deflect.
  • movable deflection means 32 are provided which can be connected either in the position shown by the solid line or in the position shown in dashed lines.
  • the position of the deflection means 32 is determined and caused by the control device 23.
  • the deflection means 32 can be driven by motor, for example, wherein the preferably designed as electric motors motors are connected by control technology via the control line 29 to the control device 23. If, for example, a particularly low temperature of the material 5 in the region of the outlet opening 9 is measured via the measuring device 21, then the material 5 can be deflected directly onto the third conveyor belt 28 during the passage of the deflection device 8, since there is no longer any subsequent cooling is required. Conversely, at very high temperatures, the conveying path length of the material 5 can be considerably increased by adding the second conveyor belt 7 and the second deflecting device 30, thus achieving a significantly better cooling of the material 5.
  • cooling device 25 can be activated, which may include in addition to the supply of air and the introduction of water or water vapor for cooling.
  • Fig. 4 is now a plan view of the system 3 of FIG. 1 is shown. Below the combustion boiler 2, the housing 24 of the device 1 can be seen.
  • the first arrow 10 shown with a solid line indicates the first horizontal direction component 11, while the second arrow 12, which is shown in dotted lines, indicates the second horizontal direction component 13. Links can be found the container 4 with the material 5 accumulated therein, which is discharged there from the second conveyor belt 7.
  • the material 5 is removed from the combustion boiler 2 via a first conveyor belt 6, a second conveyor belt 7 and a third conveyor belt 28 to the container 4.
  • the angles ⁇ and ß are clamped. In the embodiment shown, both angles ⁇ and ⁇ are approximately 135 °.
  • the system 3 has only a relatively small demand for base area, which also decreases with increasing angles ⁇ or ⁇ . In this embodiment, moreover, covering degrees of 10 to 20% are realized in the vertical direction between the housing sections of the conveyor belts 6, 7 and 28, which are regarded as the lower limit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

L'invention concerne un procédé et un dispositif (1) d'évacuation de matière brûlante (5) à partir d'une chaudière de combustion (2), comprenant au moins un carter (24), au moins une bande transporteuse (6) et au moins un dispositif de renvoi (8). Ladite au moins une bande transporteuse (6) transporte ainsi la matière (5) d'abord avec une première composante horizontale de direction (11) et, après passage du dispositif de renvoi (8), avec une deuxième composante horizontale de direction (13), différente de la première. Par ailleurs, la matière (5) suivant la première composante horizontale de direction (11), en dehors du dispositif de renvoi (8), est toujours séparée par le carter (24) de la matière (5) suivant la deuxième composante horizontale de direction (13). La première composante horizontale de direction (11) et la deuxième composante horizontale de direction (13) forment entre elles un angle (2) de 130 ° à 180 °.
EP09740143.4A 2008-10-31 2009-10-24 Procédé et appareil pour l'extraction de produits de combustion d'un appareil de combustion Not-in-force EP2347183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008054098A DE102008054098A1 (de) 2008-10-31 2008-10-31 Verfahren und Vorrichtung zur Förderung von Material aus einem Verbrennungskessel
PCT/EP2009/064026 WO2010049367A2 (fr) 2008-10-31 2009-10-24 Procédé et dispositif d'évacuation de matière à partir d'une chaudière de combustion

Publications (2)

Publication Number Publication Date
EP2347183A2 true EP2347183A2 (fr) 2011-07-27
EP2347183B1 EP2347183B1 (fr) 2013-07-10

Family

ID=41479335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09740143.4A Not-in-force EP2347183B1 (fr) 2008-10-31 2009-10-24 Procédé et appareil pour l'extraction de produits de combustion d'un appareil de combustion

Country Status (5)

Country Link
US (1) US20110286817A1 (fr)
EP (1) EP2347183B1 (fr)
CN (1) CN102301184B (fr)
DE (1) DE102008054098A1 (fr)
WO (1) WO2010049367A2 (fr)

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DE102010024020B4 (de) * 2010-06-16 2019-08-01 Clyde Bergemann Drycon Gmbh Fördermittel und Verfahren zum Fördern von heißem Material
DE102011015088A1 (de) * 2011-03-25 2012-09-27 Clyde Bergemann Drycon Gmbh Verbrennungsanlage mit Nachbrennerrost
DE102011101390A1 (de) * 2011-05-13 2012-11-15 Clyde Bergemann Drycon Gmbh Verfahren und Vorrichtung zum Betreiben einer Fördereinrichtung für ein Abbrandprodukt
CN102797222B (zh) * 2012-07-24 2014-09-24 武汉武大巨成结构股份有限公司 一种能避让桥侧障碍的吊架铰接式桥梁检修车
CN107747872A (zh) * 2017-11-15 2018-03-02 王延宏 一种全自动窑炉
CN112985085B (zh) * 2021-02-22 2022-11-08 晋城市博宇链传动有限公司 一种钢铁烧结节能冷却装置

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Also Published As

Publication number Publication date
EP2347183B1 (fr) 2013-07-10
CN102301184A (zh) 2011-12-28
WO2010049367A2 (fr) 2010-05-06
US20110286817A1 (en) 2011-11-24
DE102008054098A1 (de) 2010-05-06
WO2010049367A3 (fr) 2011-06-16
CN102301184B (zh) 2014-10-29

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