EP0843141B1 - Dispositif de chargement de charbon pour une installation de séchage de lignite - Google Patents

Dispositif de chargement de charbon pour une installation de séchage de lignite Download PDF

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Publication number
EP0843141B1
EP0843141B1 EP96118516A EP96118516A EP0843141B1 EP 0843141 B1 EP0843141 B1 EP 0843141B1 EP 96118516 A EP96118516 A EP 96118516A EP 96118516 A EP96118516 A EP 96118516A EP 0843141 B1 EP0843141 B1 EP 0843141B1
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EP
European Patent Office
Prior art keywords
steam
drying
lignite
unit
conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96118516A
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German (de)
English (en)
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EP0843141A1 (fr
Inventor
Ulrich Dr.-Ing. Schaberg
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.)
GEA Waerme und Umwelttechnik GmbH
Original Assignee
GEA Waerme und Umwelttechnik GmbH
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Application filed by GEA Waerme und Umwelttechnik GmbH filed Critical GEA Waerme und Umwelttechnik GmbH
Priority to DE59600249T priority Critical patent/DE59600249D1/de
Priority to AT96118516T priority patent/ATE166959T1/de
Priority to EP96118516A priority patent/EP0843141B1/fr
Publication of EP0843141A1 publication Critical patent/EP0843141A1/fr
Application granted granted Critical
Publication of EP0843141B1 publication Critical patent/EP0843141B1/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed

Definitions

  • the invention relates to a coal feed device for a plant for steam fluidized bed drying of broken Raw lignite, which has at least two drying units includes.
  • the upstream is separate for this power plant technology Drying is essential.
  • Drying is essential. The possible increase in efficiency through an energetically favorable The greater the drying process, the higher the drying process water content to be reduced.
  • Each drying unit includes a modular design a trigger unit in a vertical stacking arrangement for dried brown coal, one nozzle base unit, one Heat exchanger unit, a steam fluidized bed dryer unit and a feed unit for raw lignite.
  • This concept ensures that the availability of a Power plant with more than 7500 operating hours per year is not affected by the coal predrying.
  • the raw lignite becomes a drying unit via a cellular wheel sluice and into the steam fluidized bed dryer unit integrated screw conveyor given up.
  • This facility has proven itself. Basically but is a further development for improvement of the coal entry process and to reduce the Desirable susceptibility to failure.
  • the invention is therefore based on the object of a coal feed device for a system for steam fluidized bed drying broken raw lignite to improve.
  • the coal feed device comprises at least a gas-tight allocation device, which is followed by a conveyor is.
  • Allocation device and conveyor are in arranged a pre-treatment room. It is located above the drying units and is therefore outside the hydrocarbon atmosphere.
  • the raw lignite is adjustable from the conveyor in the longitudinal direction of the conveyor transferred to the drying units.
  • a cellular wheel sluice preferably comes as the allocation device for use.
  • Mechanical conveyors are continuous conveyors suitable with or without traction means.
  • chain scraper conveyor is practical on. Basically, however, are link belt or trough chain conveyors suitable as well as screw conveyors.
  • Lignite drying plants When connected from several drying units Lignite drying plants are useful multiple allocation devices and multiple conveyors intended. The individual drying units are then via the conveyor with wet lignite in line with the quantity required acted upon.
  • the pre-treatment room is also used for Preheating wet brown coal.
  • the pre-treatment room can be used for this in various ways, directly or indirectly are heated, for example by means of steam or Hot air. Heating the conveyor is also conceivable by means of suitable heating means, such as heating coils.
  • Another major advantage is that it is already preheated Wet lignite in the fluidized bed of the drying units is abandoned. This creates stability supports the fluidized bed and improves the Fluid bed operating conditions reached. This ensures a high degree of dryness with high throughput.
  • a conveyor Cross-adjustable discharge openings distributed over its length on. In this way, the application can of the individual drying units with wet brown coal regulated according to quantity requirements and dependent be controlled by the operating conditions.
  • the discharge openings are in its bottom.
  • a Chain scraper conveyor extends over several each Drying units.
  • the discharge openings are then arranged above the drying units. Means The opening cross-section of the discharge openings can be a slide changed and the discharge regulated.
  • the individual drying units will then be the required Amount of wet brown coal allocated.
  • the wet lignite passes from the conveyor via discharge chutes in the drying units, as this claim 3 provides.
  • drying units of the lignite drying plant assigned to a common steam collection chamber.
  • the heat exchanger units are the Drying units through a partition in at least divided into two vertically aligned fluidized bed cells.
  • the feed chutes pass through the steam collection chamber, around the fluidized bed cells with wet lignite to act upon.
  • the fluidized bed cells preferably have dimensions of 2 ⁇ 2 m, so that fluidized bed areas of 4 m 2 result.
  • each heat exchanger unit Bundle of U or V-shaped heat exchanger tubes it is expedient to have one in each heat exchanger unit Bundle of U or V-shaped heat exchanger tubes integrated.
  • the heat exchanger tubes penetrate here the partition.
  • the partition is perforated for this purpose and the heat exchanger tubes are through these openings guided.
  • the partition thus takes over additional and stabilization functions for the heat exchanger tube bundle.
  • the weight of the lignite grains is in the fluidized bed by the opposite flow force of the vortex medium almost canceled.
  • the fluidized Lignite coal then behaves like a liquid and flows through the heat exchanger unit. Here an intensive heat transfer takes place high turbulence instead and that contained in the raw lignite Water is evaporated. This way, a reliable one Drying the raw lignite to almost any residual water content can be achieved.
  • FIGs 1 to 3 show one out of a total of eight Drying units 1-8 existing dryer line 9. How the individual can be seen from FIG Drying units 1-8 in pairs in groups 10, 11, 12, 13 interconnected.
  • Figure 2 illustrates the Construction of a drying unit 1-8.
  • a trigger unit is arranged vertically one above the other 14 for dried brown coal TBK, a nozzle base unit 15, a heat exchanger unit 16, a steam fluidized bed dryer unit 17 and a task unit 18 for the wet raw lignite FBK.
  • Each heat exchanger unit 16 is vertical by one aligned partition 19 in two vertically aligned Fluidized bed cells 20, 21 divided. With that, dryer street 9 shown here a total of sixteen Fluid bed cells 20, 21.
  • a common vapor collection chamber 22 is arranged above the steam fluidized bed dryer units 17 .
  • Output side of the steam fluidized bed dryer units 17 are internals 23 in the form of grate floor units 24 intended.
  • the grate floor units 24 consist of two Layers of one another and offset from one another Angle profiles 25.
  • the internals 23 cause one Pressure loss in the drying units 1-8, so that a Uniformization of the volume flow in all drying units 1-8 is done.
  • all drying units 1-8 always almost the same amount of hydro-steam KWD deducted, regardless of how far the individual drying units 1-8 from the location the outlet 26 of the vapor collection chamber 22 are removed.
  • the internals 23 take on a cleaning function, there entrained dust from the hydro-steam KWD is deposited on them.
  • Purified hydro-steam KWD is used as a fluidizing medium WM returned to the system via the nozzle base unit 15. Furthermore, the cleaned and heated hydro steam KWD as heating steam HD for the heat exchanger unit 16 can be used.
  • each drying unit becomes 1-8 damp Lignite FBK in a grain size range from 0 to 10 mm fed by the task unit 18.
  • the feed unit 18 is carried out from the bunker 27
  • Wet brown coal fed FBK Arrived from bunker 27 the wet lignite FBK via four bunker funnels 28-31 in four rotary locks 32-35. These give the wet lignite FBK on four chain scraper conveyors 36-39.
  • the rotary valve 32-35 and the chain scraper conveyor 36-39 are in a closed pre-treatment room 40, the drying units above 1-8 the steam collection chamber 22 is arranged.
  • the pre-treatment room 40 can be heated so that preheating the FBK wet brown coal can be made.
  • the Preheating improves the flow behavior of the wet lignite FBK. Since the pre-treatment room 40 is outside the hydro-steam atmosphere, it can easily also during the operation of the drying system Maintenance or repair purposes.
  • the bunker 27 is located centrally in the middle above dryer street 9. Via bunker funnels 28-31 and The cellular wheel locks 32-35 get the wet lignite on the four chain scraper conveyors 36-39. From here the wet lignite in the image plane of FIGS. 1 and 3 transported to the right or left.
  • wet lignite then falls during further transport through the discharge openings 47 ', 47' ', 47' '' or 48 ', 48 ", 48"'. This way it becomes a continuous one Distribution of wet lignite FBK to the individual Drying units 1-8. Whichever Drying unit 1-8 straight with wet lignite FBK individual discharge openings can also be loaded 47-47 "'or 48-48"' can be closed.
  • the conveying speed the chain scraper conveyor 36-39 continuously is adjustable.
  • the FBK passes through the discharge chutes 41, 42 Steam collecting chamber 22 and enters the steam fluidized bed dryer unit 17th
  • the wet lignite FBK then falls down against it upward flowing vortex medium WM.
  • a vortex medium WM comes the expelled from the FBK wet brown coal and cleaned hydro-steam KWD used.
  • the steam fluidized bed dryer unit 17 comprises one Chamber 53 which widens in a trapezoidal shape.
  • the cross-sectional expansion will reduce the speed of the hydro-steam flowing upwards KWD reached. This will remove fine grain reduced.
  • the heat exchanger unit 16 is arranged below the steam fluidized bed dryer unit 17 below the heat exchanger unit 16 is arranged below the Heat exchanger unit 16 is arranged. Above the Heat exchanger unit 16 passes the brown coal bed into the fluidized bed through the heat exchanger unit 16 continues. The fluidized brown coal then flows through the fluidized bed cells 20, 21.
  • Heat exchanger tubes 56, 57 integrated. Every heat exchanger tube 56, 57 has longitudinal tube sections inclined to the horizontal 58, 59 on the vertical pipe sections 60, 61 merge.
  • the heat exchanger tubes 56, 57 summarized in a tube sheet 62.
  • the steam distribution chamber 63, 64 and the condensate collection chambers 65, 66 each bundle 54, 55 are arranged on the same side.
  • Via a steam manifold 67 and the manifold 68 is fed to the steam distribution chambers 63, 64 heating steam HD.
  • the condensate K occurs into the condensate collection chambers 65, 66 and is about deductions 69, 70 removed.
  • Each heat exchanger unit 16 is separated by a partition 19 divided into two fluidized bed cells 20, 21.
  • the Partition 19 is penetrated by bundles 54, 55.
  • the partition 19 to the cross section of the Heat exchanger tubes 56, 57 provided adapted openings.
  • the heat exchanger tubes 56, 57 are through the openings passed through. They are carried by the partition 19 and stabilized.
  • a unit from bundles 54, 55, partition 19, tube sheet 62 and steam collecting chambers 63, 64 and condensate collecting chambers 65, 66 can be pre-assembled in the heat exchanger unit 16 can be installed transversely.
  • nozzle base unit 15 there are two grate nozzle bases 71, 72 incorporated. As shown in Figure 4, everyone exists Grate nozzle base 71, 72 from a row parallel and side by side horizontal nozzle pipes 73.
  • the grate nozzle bottoms 71, 72 are inserted into the nozzle base unit from one side 15 inserted.
  • the loading of the grate nozzle bottoms 71, 72 with vortex medium WM is carried out from the vortex medium ring line 74 from via the feed lines 75, 76 and the Distribution lines 77, 78.
  • the vortex medium WM then occurs out through nozzles 79 and flows up through the fluidized bed cells 20, 21.
  • FIG. 5 shows the structure of a nozzle 79.
  • the nozzle 79 includes a nozzle tube 73 fixed to the vertically upward nozzle 80, which by a Cap 81 is closed. At the top 82 are radial Nozzle openings 83, 84 arranged.
  • the vortex medium WM passes through an opening 85 in the nozzle tube 73 in the nozzle 80 and flows through the nozzle openings 83, 84 radially. This is where the vortex medium gets WM in a between socket 80 and cap wall 86 located in the annular space 87. In the annular space 87, the vortex medium WM first flow downwards before crossing the Annular gap 88 can emerge. Through this training the Nozzle 79 is avoided that fine-grained brown coal in the Nozzle openings 83, 84 can flow. This will cause constipation the nozzle tubes 73 prevented.
  • hydro-steam KWD as a fluidizing medium WM on the nozzle base unit 15 and the grate nozzle bases 71, 72 initiated. This depends on the pressure overheated with a small temperature difference.
  • Hydro-steam KWD flows through the wet lignite FBK on the way through the heat exchanger unit 16 or the fluidized bed cells 20, 21 and the steam fluidized bed dryer unit 17 from bottom to top.
  • the lignite to be dried is Hydro-steam KWD in a suspended state transferred.
  • the amount of hydro-steam introduced KWD and the inflow speed are designed so that in Area above the heat exchanger unit 16 a homogeneous fluidized bed is created, which is characterized by the heat exchanger unit 16 or the fluidized bed cells 20, 21 continues. There is extraordinary in this flight stream favorable conditions for heat transfer. On the way through the heat exchanger unit 16 is from the downward flowing brown coal evaporates hydrocarbon and the water content is reduced to approx. 10% residual moisture.
  • the driven hydro-steam KWD of all drying units 1-8 then gets into the steam collection chamber 22 and from there via outlet 26 for aftertreatment.
  • Excess steam can flow from the circulatory system to the Balance the mass balance to be taken to the pressure to keep constant in the drying units 1-8.
  • Excess steam can be used as heating steam HD or otherwise will.
  • a trigger unit 14 is two Drying units 1, 2; 3, 4; 5, 6; 7, 8 assigned.
  • the withdrawal takes place via a screw conveyor 89 with two oppositely aligned spiral sections 90, 91 and a rotary valve 92.
  • the side walls 93, 94 of the trigger unit 14 are in the direction of the screw conveyor 89 inclined so that the dried brown coal TBK easily can flow to the screw conveyor 89.
  • the cellular wheel locks 92 of the individual extraction units 14 carry the dry lignite TBK on a discharge conveyor 95 from where the dry brown coal TBK to Further use in the power plant process is brought.
  • a discharge conveyor 95 extends below the drying units 1-8 in an encapsulated discharge space 96, which, if necessary, for inerting and / or cooling the Dry lignite TBK can be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Claims (4)

  1. Dispositif de chargement de charbon destiné à une installation pour le séchage en lit fluidisé à la vapeur de lignite brute concassée qui comporte au moins deux appareils de séchage (1-8), avec au moins un dispositif d'amenée étanche au gaz (32-35) et un convoyeur ou transporteur (36-39) agencé en aval dans une zone de prétraitement chauffable (40) au-dessus de l'appareil de séchage (1-8) et la lignite brute étant transférée dans la direction longitudinale du transporteur ou convoyeur (36-39) de façon régulable en quantité dans les appareils de séchage (1-8).
  2. Dispositif de chargement de charbon selon la revendication 1, caractérisé en ce que le convoyeur ou transporteur (36-39) présente sur sa longueur des ouvertures d'évacuation (47, 48) régulables par section.
  3. Dispositif de chargement de charbon selon la revendication 1 ou 2, caractérisé en ce que des goulottes de chargement (41, 42) sont affectées au convoyeur ou transporteur (36-39).
  4. Dispositif de chargement de charbon selon la revendication 3, caractérisé en ce qu'une chambre de recueil de vapeur (22) commune est affectée aux appareils de séchage (1-8) et les goulottes de chargement (41, 42) traversent les chambres de recueil de vapeur (22) pour charger au moins deux cellules à lit fluidisé orientées verticalement (20, 21) en tant que composants séparés par une cloison (19) d'une unité de transfert de chaleur (16).
EP96118516A 1996-11-19 1996-11-19 Dispositif de chargement de charbon pour une installation de séchage de lignite Expired - Lifetime EP0843141B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59600249T DE59600249D1 (de) 1996-11-19 1996-11-19 Kohlenaufgabeeinrichtung für eine Braunkohlentrocknungsanlage
AT96118516T ATE166959T1 (de) 1996-11-19 1996-11-19 Kohlenaufgabeeinrichtung für eine braunkohlentrocknungsanlage
EP96118516A EP0843141B1 (fr) 1996-11-19 1996-11-19 Dispositif de chargement de charbon pour une installation de séchage de lignite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96118516A EP0843141B1 (fr) 1996-11-19 1996-11-19 Dispositif de chargement de charbon pour une installation de séchage de lignite

Publications (2)

Publication Number Publication Date
EP0843141A1 EP0843141A1 (fr) 1998-05-20
EP0843141B1 true EP0843141B1 (fr) 1998-06-03

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EP96118516A Expired - Lifetime EP0843141B1 (fr) 1996-11-19 1996-11-19 Dispositif de chargement de charbon pour une installation de séchage de lignite

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EP (1) EP0843141B1 (fr)
AT (1) ATE166959T1 (fr)
DE (1) DE59600249D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100436414C (zh) * 2003-04-11 2008-11-26 兰贝克赛实验室有限公司 作为毒蕈碱受体拮抗剂的氮杂双环衍生物
DE102007028438B4 (de) * 2007-06-18 2019-01-24 Outotec Oyj Gasdüse und Reaktor hiermit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE598703C (de) * 1932-07-08 1934-06-16 Gewerkschaft Leonhardt Verfahren zur Beschickung von Braunkohlentrocknern
GB715836A (en) * 1950-12-13 1954-09-22 Smidth & Co As F L Improvements relating to heat-exchange processes for heating or cooling powdered material
US3525161A (en) * 1968-07-03 1970-08-25 Leslie S Jesperson Method of and apparatus for drying hops with rotary carrier
JPS59167676A (ja) * 1983-03-11 1984-09-21 株式会社　大川原製作所 多室型流動層乾燥機
DD271945A1 (de) * 1988-05-11 1989-09-20 Orgreb Inst Kraftwerke Vorrichtung zur verteilung des eintragsgutes ueber eine wirbelschicht

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Publication number Publication date
ATE166959T1 (de) 1998-06-15
DE59600249D1 (de) 1998-07-30
EP0843141A1 (fr) 1998-05-20

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