EP2182280A1 - Système d'évacuation et de refroidissement de cendres d'installations de chauffe - Google Patents

Système d'évacuation et de refroidissement de cendres d'installations de chauffe Download PDF

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Publication number
EP2182280A1
EP2182280A1 EP08018893A EP08018893A EP2182280A1 EP 2182280 A1 EP2182280 A1 EP 2182280A1 EP 08018893 A EP08018893 A EP 08018893A EP 08018893 A EP08018893 A EP 08018893A EP 2182280 A1 EP2182280 A1 EP 2182280A1
Authority
EP
European Patent Office
Prior art keywords
ash
planks
cooling
conveying
conveying direction
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.)
Withdrawn
Application number
EP08018893A
Other languages
German (de)
English (en)
Inventor
Thore Dipl.-Ing. Möller
Jörg Dipl.-Ing. Hielscher
Hermann Dipl.-Ing. Knabbe
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.)
Claudius Peters Projects GmbH
Original Assignee
Claudius Peters Technologies 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 Claudius Peters Technologies GmbH filed Critical Claudius Peters Technologies GmbH
Priority to EP08018893A priority Critical patent/EP2182280A1/fr
Publication of EP2182280A1 publication Critical patent/EP2182280A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • 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
    • F23J2900/01003—Ash crushing means associated with ash removal means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
    • F23L2900/15041—Preheating combustion air by recuperating heat from ashes

Definitions

  • the invention relates to a system for the removal and cooling of ashes from firing boilers, in particular coal firing. Downstream of the boiler, the system comprises an ash inlet for ash supplied by the boiler, a transport device which conveys the ashes to a spatially separate discharge point, and a post-processing station which crushes the ash supplied from the delivery point, the transport device being associated with a cooling device, which is cooling gas via a gas supply to the ashes leads.
  • constructions which are a metal strip for transport operate the ash ( EP 0 836 697 B1 . WO 03/085323 A1 ).
  • the metal band is a continuous endless band consisting of individual plate-like metal elements. Each metal element extends over the entire width of the metal strip and is coupled at its longitudinal sides to adjacent metal elements.
  • the metal strip is completely, that is arranged with its carrying the ash load space and the underlying running back strand in a sealed cooler housing.
  • the cooling air not only covers the load area with the ashes, but also the empty section underneath.
  • the invention has the object to improve a system of the type mentioned in that it is less susceptible to wear.
  • a system for discharging and cooling ash from firing boilers, in particular coal firing comprising an ash inlet for ash supplied by the boiler, a transport device which conveys the ashes to a spatially separate delivery point, and a post-processing station which feeds the from the delivery point Crushed ash
  • the transport device is associated with a cooling device, which leads cooling gas via a gas supply to the ash, provided that the transport device and the cooling device are integrated into a combined transport and cooling device with an ash support plate formed from a plurality of parallel adjoining planks, wherein at least a part of the planks act as conveying elements, which are reciprocated by a drive device in the conveying direction and are guided by the cooling gas channels from a plate subspace to the ash-carrying upper side.
  • the core of the invention is the idea to allow with the majority of movable longitudinal planks a low-ash transport of the ash from the boiler to the after-treatment station.
  • the planks perform a linear movement that is relatively easy to seal. They form a closed support plate for the ashes, so that under the plate creates a protected against Ascheintrag subspace.
  • the bearings, guides and drive means, in short the entire sensitive mechanism of the transport device can be arranged here, without being directly exposed to the abrasive action of the ash. Further, the subspace of the plate is cooled by the supply of not yet heated cooling gas, so that the thermal load is reduced.
  • the planks are oriented longitudinally to the conveying direction and simultaneously moved back and forth by the drive device before and.
  • the planks can be oriented overlapping transversely to the conveying direction and be provided alternately stationary and movable planks.
  • the post-processing station is designed as a crusher.
  • the ash tends to caking, so that at the end of the conveyor line larger clumps may occur. These not only require an efficient cooler, as provided by the invention, but also a crushing before further processing.
  • the arrangement according to the invention is particularly suitable for waterless cooling. Although in principle could be supplied by the feeds for cooling gas and a liquid such as water, however, a cooling with gas is completely sufficient because of the good cooling performance of the arrangement according to the invention.
  • a plurality of feedthroughs for the cooling gas from the underside to the top are expediently provided in the planks in succession.
  • a control device which adjusts the conveying speed of the planks so depending on the ash, that the height of the ash on the planks is at least 0.7 times the plank width. It has been shown that with this relationship between ash height and plank width a particularly efficient promotion effect can be achieved.
  • the invention is thus particularly suitable for continuous operation.
  • the invention further relates to the use of such a combined cooling and transport device for transporting and cooling ash.
  • FIG. 1 schematically shows an arrangement according to a first embodiment of the invention. It is arranged between a firing boiler 1 and a device 8 for the post-processing of ash.
  • the ash 9 falls over a vertical connecting pipe 20, which connects the firing boiler 1 with an inlet 21 of a radiator 2 arranged directly underneath. It comprises a housing 22 which encloses an interior 23.
  • a so-called walking floor is arranged as a transport device 4 with a plurality of parallel to each other in the longitudinal direction slidable planks 42, which act as conveying elements 41.
  • the top of the planks forms a well-supporting support plane 40 for the ashes 9.
  • the ash 9 is transported along an arrow-shaped conveying direction 99 from the inlet 21 to an outlet 28. From there, the ash is dropped to the post-processing device, for example, to a crusher 8 or a hammer mill (not shown). After breaking, the ash with the arrangement and method according to the invention is crushed and cooled so far that it can be easily removed by a known per se pneumatic conveying system 88.
  • the ash support plate 40 is arranged substantially horizontally, but may also have a slight slope in the conveying direction 99.
  • the planks 42 are driven by a drive system designated in its entirety by the numeral 55. The planks 42 can thus be individually moved back and forth.
  • a control module 5 is provided to control a control module 5 .
  • the drive mode is in the Fig. 2 visualized. It will go through several phase cycles. In a first, in Fig. 2a phase cycle shown all three planks 42 are shown in the conveying direction 99 furthest advanced position. In this position stops their forward movement. After that they are individually driven back, as in the representations Fig. 2b , Fig. C and Fig. D is shown. Once they are all in Fig.
  • the planks 42 include a plurality of air passage openings 32 in a uniform distribution as possible.
  • troughs 44 can be separated from each other by transverse walls, the so dimensioned are that ashes are held in it. This forms a protective layer against the overlying hot and abrasive ash.
  • On the troughs 44 can be dispensed with, if the material is less abrasive or if the surface of the planks 42 is equipped sufficiently resistant to wear. In this way, one can influence the coefficient of friction between rust and good. This can also be done in different ways across the width of the ash support plate 40, if one wishes that the ash in certain width ranges is more influenced by the friction of the adjacent ash than by the underlying plank 42.
  • a cooling device 3 with a blower 30 is designed so that a subspace 37 is subjected to overpressure and thus the cooling air from the subspace 37 through the air passage openings 32 and through the ash bed 9 is pressed. So that about falling down through the openings 32 ash particles do not enter the subspace 37, 32 known catch profiles (not shown) can be located under the openings, the eventual diarrhea catch and give him the opportunity by the air flow back up into the ash to be returned.
  • a gap 46 can penetrate through the ash down.
  • a U-shaped channel 45 is stationary, which receives the falling ash.
  • a downwardly projecting bar 47 is arranged, which dives into the channel 45 and whose lower edge only a small distance from the bottom of the channel 45 has. This represents a seal against the passage of goods through the grate subspace 37.
  • the ratio between the distance formed between the lower edge of the strip 47 and the bottom of the channel 45 and the gap between the strip is dependent on the type of ash, it is expediently 3 to 20 times as large as said distance, more preferably about 8 to 12 times as large.
  • the distance between the lower edge of the strip 47 and the bottom of the groove 45 is 2 to 5 mm and the height of the side leg of the U-shaped groove 45 is about 80 mm.
  • the controller 5 is designed to determine the thickness of the ash layer on the support plate 40 via a height sensor 51, and depending on the ash attack by means of the drive system 55, the speed in the conveying direction 99 or via the fan 30, the amount of through the openings 32nd to change into the ash blown cooling gas.
  • a sensitive adaptation to the respective operating state of the firing boiler 1 can be achieved.
  • the planks 42 can also be connected in total or in sections via flexible channels (not shown) to a central compressed air source 50. This gives the possibility to cool the ashes in different latitude and longitude areas differently.
  • the transport function as achieved by the movement of the planks 42
  • the cooling function as is achieved by the cooling gas passage openings 32 in the planks 42, integrated into each other so that a protection of the planks 42 from too high a temperature and further protection of the sensitive drive 55 of the planks 42 (thanks to its arrangement in the ashless subspace 37) is achieved.
  • the planks 42 are thus both thermally and mechanically loaded only comparatively low. The maintenance cycles can be significantly reduced compared to the known arrangement of a conveyor belt in the cooler, in which the returning strand also runs in the hot area.
  • the invention thus enables a safe and efficient transport of the ash while good cooling.
  • the post-processing can readily take place, for example by means of the illustrated crusher 8.
  • the ash is then so fine that it can be removed easily with a pneumatic conveying system 88 known per se.
  • a second embodiment of the plant according to the invention is in the FIGS. 4 and 5 shown. It is different from the one in the FIGS. 1 to 3 illustrated first embodiment substantially in that the planks are arranged overlapping each other in the transverse direction.
  • the drive means 55 ' is formed such that the movable planks 42''are moved back and forth simultaneously and at the same speed.
  • this is not absolutely necessary, it may also follow a segmental movement, for example, first in one front segment near the inlet 21 and only thereafter in a middle and then thereafter in a rear segment near the outlet 28 and / or different speeds for the forward stroke and the backward stroke of the movable planks 42 ', 42 "may be set.
  • FIG. 1 Another embodiment of the inlet of the arrangement of the radiator 2 'with respect to the Feuerungskessel 1 is shown.
  • the feed takes place via a connection 20 'designed as an exhaust pipe into the inlet 21 of the cooler 2'.
  • the type of inlet is not limited to the respective embodiment, but it may also be the inlet to the vertical connecting pipe 20 are arranged in the second embodiment and vice versa.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasification And Melting Of Waste (AREA)
EP08018893A 2008-10-29 2008-10-29 Système d'évacuation et de refroidissement de cendres d'installations de chauffe Withdrawn EP2182280A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08018893A EP2182280A1 (fr) 2008-10-29 2008-10-29 Système d'évacuation et de refroidissement de cendres d'installations de chauffe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08018893A EP2182280A1 (fr) 2008-10-29 2008-10-29 Système d'évacuation et de refroidissement de cendres d'installations de chauffe

Publications (1)

Publication Number Publication Date
EP2182280A1 true EP2182280A1 (fr) 2010-05-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010024020A1 (de) * 2010-06-16 2011-12-22 Clyde Bergemann Drycon Gmbh Fördermittel und Verfahren zum Fördern von heißem Material
EP2620706A3 (fr) * 2012-01-26 2015-09-30 Babcock Borsig Steinmüller GmbH Installation de production de vapeur avec chambre postcombustion

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634660A1 (de) 1986-10-10 1988-04-14 Krupp Polysius Ag Schubrostkuehler
EP0836697B1 (fr) 1995-06-19 1999-08-25 Magaldi Ricerche E Brevetti S.R.L. Convoyeur/refroidisseur de materiaux en vrac
EP0972988B1 (fr) 1998-07-14 2003-02-12 Von Roll Umwelttechnik AG Procédé et dispositif pour enlever l'eau des résidus de combustion évacués mécaniquement d'un dispositif d'enlèvement du laitier par voie humide
WO2003085323A1 (fr) 2002-04-09 2003-10-16 Magaldi Ricerche E Brevetti S.R.L. Convoyeur/refroidisseur a air et eau pour des matieres en vrac chaudes
JP2003302040A (ja) * 2002-04-12 2003-10-24 Takuma Co Ltd 焼却灰排出装置およびその制御方法
EP1509737A1 (fr) 2003-05-08 2005-03-02 Claudius Peters Technologies GmbH Procede et dispositif pour le transport de matiere en vrac sur une grille
WO2006005574A1 (fr) * 2004-07-09 2006-01-19 Magaldi Power S.P.A. Systeme integre servant a extraire des cendres lourdes, leur conversion en cendres legeres et reduction de matieres non brulees

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634660A1 (de) 1986-10-10 1988-04-14 Krupp Polysius Ag Schubrostkuehler
EP0836697B1 (fr) 1995-06-19 1999-08-25 Magaldi Ricerche E Brevetti S.R.L. Convoyeur/refroidisseur de materiaux en vrac
EP0972988B1 (fr) 1998-07-14 2003-02-12 Von Roll Umwelttechnik AG Procédé et dispositif pour enlever l'eau des résidus de combustion évacués mécaniquement d'un dispositif d'enlèvement du laitier par voie humide
WO2003085323A1 (fr) 2002-04-09 2003-10-16 Magaldi Ricerche E Brevetti S.R.L. Convoyeur/refroidisseur a air et eau pour des matieres en vrac chaudes
JP2003302040A (ja) * 2002-04-12 2003-10-24 Takuma Co Ltd 焼却灰排出装置およびその制御方法
EP1509737A1 (fr) 2003-05-08 2005-03-02 Claudius Peters Technologies GmbH Procede et dispositif pour le transport de matiere en vrac sur une grille
WO2006005574A1 (fr) * 2004-07-09 2006-01-19 Magaldi Power S.P.A. Systeme integre servant a extraire des cendres lourdes, leur conversion en cendres legeres et reduction de matieres non brulees

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010024020A1 (de) * 2010-06-16 2011-12-22 Clyde Bergemann Drycon Gmbh Fördermittel und Verfahren zum Fördern von heißem Material
CN102297434A (zh) * 2010-06-16 2011-12-28 克莱德贝尔格曼干控制有限公司 用于输送热材料的输送装置及方法
US8733255B2 (en) 2010-06-16 2014-05-27 Clyde Bergemann Drycon Gmbh Conveying means and method for conveying hot material
CN102297434B (zh) * 2010-06-16 2016-02-24 克莱德贝尔格曼干控制有限公司 用于燃烧残余物的输送装置和方法及具有该装置的燃烧设备
DE102010024020B4 (de) * 2010-06-16 2019-08-01 Clyde Bergemann Drycon Gmbh Fördermittel und Verfahren zum Fördern von heißem Material
EP2620706A3 (fr) * 2012-01-26 2015-09-30 Babcock Borsig Steinmüller GmbH Installation de production de vapeur avec chambre postcombustion

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