EP1085264B1 - Procédé et dispositif pour le refroidissement par eau d'une grille de combustion - Google Patents

Procédé et dispositif pour le refroidissement par eau d'une grille de combustion Download PDF

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Publication number
EP1085264B1
EP1085264B1 EP00810789A EP00810789A EP1085264B1 EP 1085264 B1 EP1085264 B1 EP 1085264B1 EP 00810789 A EP00810789 A EP 00810789A EP 00810789 A EP00810789 A EP 00810789A EP 1085264 B1 EP1085264 B1 EP 1085264B1
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EP
European Patent Office
Prior art keywords
cooling
water
feedwater
grate
cooling water
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
EP00810789A
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German (de)
English (en)
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EP1085264A1 (fr
Inventor
Max Künzli
Hans Rüegg
Georg Ziegler
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.)
Martin GmbH fuer Umwelt und Energietechnik
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Martin GmbH fuer Umwelt und Energietechnik
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Publication of EP1085264A1 publication Critical patent/EP1085264A1/fr
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Publication of EP1085264B1 publication Critical patent/EP1085264B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H3/00—Grates with hollow bars
    • F23H3/04—Grates with hollow bars externally cooled, e.g. with water, steam or air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/002—Incineration of waste; Incinerator constructions; Details, accessories or control therefor characterised by their grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H3/00—Grates with hollow bars
    • F23H3/02—Grates with hollow bars internally cooled

Definitions

  • the invention relates to a method for the cooling of with cooling channels provided parts of a Feuerungsrostes, the be heated during operation of the Feuerungsrostes can.
  • the invention relates to a furnace grate for a combustion plant for carrying out the method.
  • DE 808263 C is still a rust for the combustion of solids discloses, in which a waste heat boiler is connected downstream, over a Feedwater line with feedwater pump and feedwater control valve Feed water is supplied. This will be additional pumping systems superfluous.
  • the object of the invention is a simple method for better Cooling a firing grate of an incinerator to create and cooling a firing grate in a plant to burn Feststeffen to improve.
  • this is achieved in a method according to claim 1, with a portion of the feedwater after the feedwater pump and before the Feedwater control valve removed from the feedwater line and under Use of a defined pressure reduction is fed to the cooling channels, the control of the pressure of the cooling water and the Flow rate in the cooling channels is set so that the Cooling water when flowing through the cooling channels to saturated steam temperature is heated and thus a part of the cooling water is evaporated and subsequently supplied to a customer is to improve in an antitank to the burning of Feststeffen and then a customer.
  • the cooling channels have a comparatively small inner diameter, whose maximum size is designed so that no segregation of water and steam takes place, and that the lines to the cooling channels, which moved in Rostbelagin opposition lie, tubes are with an inner diameter, which is less than the inner diameter of the cooling channels, and wherein the Supply lines between feedwater pump and feedwater valve with the Feed water line are connected and in the supply lines at least one Valve is arranged, which controls the amount of cooling water to be supplied via a automatic temperature control system regulates.
  • This grate has the advantage that it has cooling channels having small diameter, which in larger numbers with uniform distribution within the grate bar and the further rust parts can be poured. Another Advantage is that the cooling system with little Water is operable, since all the sensible heat and a Part of the heat of evaporation can be used.
  • cooling water / steam mixture a Steam separator is fed, the vapor deposited in the drum is passed and the remaining saturated water in the feed water is returned. In addition, it can be used to preheat the cooling water.
  • a pressure drop is generated in the cooling water, which is at least 1 ⁇ 4 of the pressure drop between the exit from the feedwater pump and the entrance into the drum. In this way, an approximately constant in all cooling circuits Cooling water flow reached.
  • Fig. 1 shows a longitudinal section of a schematically illustrated Waste incineration plant, which essentially consists of a water-cooled Combustion grate 1, an overlying combustion chamber 2 and a downstream boiler 3 with vertical Leermann 4 and a horizontal Bundle 5 consists.
  • the kiln 6, in this case waste, is on the grate 1 abandoned and burned with supply of primary air 7 and secondary air 8.
  • the Resulting flue gases 9 enter the boiler 3, they flow under Release of heat through the vertical empties 4 and the horizontal Bundle 5 of the boiler 3 and then one not shown Flue gas cleaning system supplied. In that regard, such systems are known.
  • Fig. 2 shows a schematic representation of the cooling system of water-cooled grate 1 with downstream boiler 3 in a first Embodiment variant of the invention.
  • the grate 1 consists essentially of several rows (10.1, 10.2, 10.3 ...) arranged side by side Rostbelagin whatsoever 11.
  • Fig. 2 are an example of a thermally highly stressed Row 10.1 and two thermally low loaded rows 10.2 and 10.3 are shown, where the 10.2 series has a fixed grate coating unit row and row 10.3 is to represent a moving row of grate units and the two rows 10.2 and 10.3 are connected by a flexible connecting line 38.
  • the Rostbelaginiganudge 11 may be narrow grate bars or wider grate plates. Adjacent rows overlap each other like a tile. It can be longitudinally be arranged alternately moving and fixed rows of the grate or all rows can be moved.
  • the grate 1 also has side walls 12 on.
  • the cooling channels 14 are preferably in the Rostbelagin institution 11 cast-in coils, which with supply lines 16 and discharge lines 17 are in communication, the Lines 16, 17 are thin tubes, each having a stretch circle 18th can have.
  • the cooling channels 14 have a comparatively small Inner diameter, for example 14 mm.
  • Inner diameter of the supply lines 16 is substantially lower than that Inner diameter of the cooling channels 14, for example 8 mm.
  • Inner diameter of the discharge lines 17 is because of the forming Vapor phase slightly larger than that of the supply lines 16, but still much smaller than the diameter of the cooling channels 14 in the Grating units 11.
  • each supply line 16 are a three-way valve 19 and at least one Valve 20 installed.
  • the supply lines 16 all branch off from a line 21, which in turn branches off from the feedwater line 22, in which boiler feedwater 23 from Feedwater tank 24 via the feedwater pump 25 and the Feedwater control valve 26 via the economizer 27 into the drum 28 of the Boiler 3 is passed.
  • the branch of the line 21 from the line 22 takes place doing so after the feedwater pump 25 and before the feedwater control valve 26th
  • the discharge lines 17 of the cooling systems each have check valves 29 and open into a manifold 30, which to the drum 28 of the boiler. 3 connected.
  • the drum 28 is further provided with an evaporator 31 and a superheater 32 with a water injection 33, which via a Injector 36 is controlled, in conjunction.
  • the cooling system of the grate consists of several parallel connected Subsystems.
  • Fig. 2 are exemplified a subsystem for cooling the side walls 12, a subsystem for cooling a RostbelaginRICRIA 10.1 in the thermally highly stressed part of the grate 1, a subsystem for the Cooling of two rows 10.2 and 10.3 of grate in thermally lower loaded part of the grate 1 and a subsystem for the cooling of the central beams 13th
  • cooling water 15 is used, which is a partial flow of demineralized degassing feedwater 23 for the operation of the boiler is 3.
  • This cooling water 15 bypasst the economizer 27, it is after the feedwater pump 25 and before the feedwater control valve 26 is removed from the feed line 22 and flows via the line 15 in the supply lines 16 of the parallel subsystems of the Cooling system.
  • the grate cooling is thus parallel to the economiser operation.
  • cooling water 15 stands for the grate cooling always enough water available, which also a flawless Quality and sufficient pressure.
  • throttle valve 20 causes a pressure drop, which at least 1 ⁇ 4 of the pressure drop between the exit from the Feedwater pump 25 and the entry into the drum 28 is.
  • the cooling water 15 is in the cooling of Rostbelagajien 11, the Side walls 12 and the center bar 13 at least close to the Saturated steam temperature heated. Normally, the cooling water is 15 down to the Saturated temperature heated so that a portion of the water 15 evaporates.
  • the Cooling water can also be completely or to a large extent (steam content> 0.3) evaporate, d. H. the cooling takes place according to the single-pipe boiler principle.
  • the heated cooling water or water / steam mixture over the lines 17 in a manifold 30 and from there into the drum 28th guided.
  • the cooling is thus at a pressure and temperature level, the only slightly above the drum 28 is located. The advantage is that the delivery of the dissipated amount of heat in the drum 28 is always possible.
  • a temperature control system TCA measures the outlet temperature of the heated cooling medium in line 17. The corresponding signals are directed to the valve 20, which depends on the respective Temperature level, the amount of the supplied cooling water 15 controls, d. H. at a high temperature value, the valve 20 will open further, so that more Cooling water 15 is passed into the respective cooling channels 14 than at a lower temperature. In this way, the cooling can be optimized in which case slightly superheated steam is generated (single-tube boiler principle).
  • Fig. 3 shows a schematic representation of the cooling system of a water-cooled grate with downstream boiler. This differs from that in FIG. 1 shown and described above only in that as Pressure drop points 20 apertures are used. Similarly, thin tubes or manually operated needle valves can be used.
  • the heated cooling water or the resulting during cooling to pass steam to another customer.
  • Fig. 4 shows a variant of the invention analogous to FIG. 2 at which as a buyer of the heated cooling water 15 and the water / steam mixture not the boiler 28, but the feedwater tank 24 acts.
  • the customer is the Air preheater (Economiser 27) or as shown in dashed lines, a District heating supply device 34.
  • the resulting vapor pressure can be lower be as the drum pressure, which is advantageously a deeper Grate unit temperature causes.
  • the manifold 30 in a vapor separator 35th to lead, so that the water / steam mixture enters the vapor separator, the separated steam then into the drum 28 of the boiler 3 to guide and the remaining saturated water in the feedwater tank 24th attributed, which thus additionally the cooling water 15 via a Heat exchanger 37 can be preheated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Furnace Details (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Fertilizers (AREA)
  • Baking, Grill, Roasting (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Claims (10)

  1. Procédé de refroidissement par eau (15) d'une grille (1) d'une chambre de combustion (2), dans lequel, en aval de la chambre de combustion (2) est montée une chaudière à chaleur perdue (3), à laquelle de l'eau d'alimentation (23) est acheminée par le biais d'une conduite d'alimentation (22) avec une pompe d'eau d'alimentation (25) et une soupape de régulation d'eau d'alimentation (26), et la grille (1) se compose essentiellement de plusieurs unités de garniture de grille (11) disposées en rangées (10) les unes à côté des autres ainsi que de parois latérales (12) et éventuellement de poutres centrales (13) et de supports, à l'intérieur desquels l'eau de refroidissement (15) est guidée dans des canaux de refroidissement (14), une partie de l'eau d'alimentation (23) étant prélevée de la conduite d'eau d'alimentation (22) après la pompe d'eau d'alimentation (25) et avant la soupape de régulation d'eau d'alimentation (26) et étant acheminée en utilisant une chute de pression définie (20) aux canaux de refroidissement (14), la régulation de la pression de l'eau de refroidissement (15) et de la vitesse d'écoulement dans les canaux de refroidissement (14) étant ajustée de telle sorte que l'eau de refroidissement (15) soit réchauffée à la température de vapeur saturée par son écoulement à travers les canaux de refroidissement (14) et qu'ainsi une partie de l'eau de refroidissement (15) soit évaporée, et qu'ensuite elle soit acheminée à un dispositif de prélèvement (24, 27, 28, 34, 35).
  2. Procédé selon la revendication 1, caractérisé en ce que l'eau de refroidissement réchauffée ou le mélange d'eau de refroidissement et de vapeur est acheminé(e) au tambour (28) de la chaudière à chaleur perdue (3).
  3. Procédé selon la revendication 1, caractérisé en ce que l'eau de refroidissement réchauffée ou le mélange d'eau de refroidissement et de vapeur est acheminé(e) à une partie du réseau de vapeur dans lequel la pression est plus basse que la pression du tambour.
  4. Procédé selon la revendication 1, caractérisé en ce que le mélange d'eau de refroidissement et de vapeur est acheminé à un séparateur de vapeur (35), la vapeur séparée est guidée dans le tambour (28) et l'eau de saturation restante est ramenée dans le réservoir d'eau d'alimentation (24).
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que dans l'au moins un endroit de chute de pression (20), une chute de pression est produite dans l'eau de refroidissement (15), laquelle constitue au moins 1/4 de la chute de pression entre la sortie de la pompe d'eau d'alimentation (25) et l'entrée dans le dispositif de prélèvement (24, 27, 28, 34, 35).
  6. Installation de combustion de matières solides (6) comprenant une grille, qui est refroidie selon le procédé selon l'une quelconque des revendications 1 à 5, dans laquelle la grille (1) se compose essentiellement de plusieurs unités de garniture de grille (11) qui sont réalisées de manière fixe et/ou mobile en alternance dans la direction longitudinale de la grille, disposées en rangées (10) les unes à côté des autres ainsi que de parois latérales (12) et éventuellement de poutres centrales (13) et de supports avec des canaux de refroidissement (14) disposés respectivement dans ceux-ci pour la sollicitation avec de l'eau de refroidissement (15), et de conduites d'amenée (16) et d'évacuation (17) ainsi que de conduites de connexion flexibles (38) pour les canaux de refroidissement (14), et une chaudière à chaleur perdue (3) étant montée après la grille (1), à laquelle de l'eau d'alimentation (23) peut être acheminée par le biais d'une conduite d'eau d'alimentation (22) avec une pompe d'eau d'alimentation (25) et une soupape de régulation d'eau d'alimentation (26), les canaux de refroidissement (24) présentant un diamètre intérieur comparativement petit, dont la dimension maximale est conçue de telle sorte qu'aucune dissociation d'eau et de vapeur n'ait lieu, et de telle sorte que les conduites (16, 17, 38) allant aux canaux de refroidissement (14), qui se situent dans des unités de garniture de grille (11) déplacées, soient des tubes ayant un diamètre intérieur qui est inférieur au diamètre intérieur des canaux de refroidissement (14), et les conduite d'amenée (16) entre la pompe d'eau d'alimentation (25) et la soupape de régulation d'eau d'alimentation (26) étant connectées à la conduite d'eau d'alimentation (22) et au moins une soupape (20) étant disposée dans les conduites d'amenée (16), laquelle régule la quantité d'eau de refroidissement à acheminer par le biais d'un système de contrôle de température automatique (TCA).
  7. Installation selon la revendication 6, caractérisée en ce que les canaux de refroidissement (14) sont des serpentins tubulaires coulés.
  8. Installation selon la revendication 6, caractérisée en ce que les conduites d'amenée (16) et d'évacuation (17) pour l'eau de refroidissement (15) sont réalisées avec au moins un circuit d'extension (18).
  9. Installation selon la revendication 6, caractérisée en ce que plusieurs systèmes partiels parallèles du système de refroidissement sont prévus, dont le nombre dépend de la sollicitation thermique des pièces à refroidir.
  10. Installation selon la revendication 6, caractérisée en ce que la conduite d'amenée (16) de l'eau de refroidissement (15) est connectée à une rangée d'unités de garniture de grille déplacée (10.3), qui est à son tour connectée à une rangée d'unités de garniture de grille fixe (10.2) par le biais d'une conduite de liaison flexible (38).
EP00810789A 1999-09-13 2000-09-01 Procédé et dispositif pour le refroidissement par eau d'une grille de combustion Expired - Lifetime EP1085264B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19943665 1999-09-13
DE19943665A DE19943665B4 (de) 1999-09-13 1999-09-13 Verfahren zur Kühlung eines Rostes für einen Feuerraum mittels Wasser sowie Rost zur Verbrennung von Feststoffen

Publications (2)

Publication Number Publication Date
EP1085264A1 EP1085264A1 (fr) 2001-03-21
EP1085264B1 true EP1085264B1 (fr) 2005-11-16

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EP00810789A Expired - Lifetime EP1085264B1 (fr) 1999-09-13 2000-09-01 Procédé et dispositif pour le refroidissement par eau d'une grille de combustion

Country Status (7)

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EP (1) EP1085264B1 (fr)
JP (1) JP2001124324A (fr)
KR (1) KR100659956B1 (fr)
AT (1) ATE310209T1 (fr)
DE (2) DE19943665B4 (fr)
NO (1) NO323854B1 (fr)
TW (1) TW550362B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9109794B2 (en) 2005-07-19 2015-08-18 Ceramic Fuel Cells Limited Steam generator
CN101956984A (zh) * 2010-11-04 2011-01-26 无锡太湖锅炉有限公司 一种单锅筒三通道链条锅炉
JP5530007B2 (ja) * 2013-07-24 2014-06-25 有限会社春日サービス 固形燃料焚きボイラー燃焼装置及び産業廃棄物用の焼却炉装置
DE102014008858A1 (de) 2014-06-16 2015-12-17 Joachim Kümmel Verfahren zur Verbrennung von Abfall und Biomassen auf einem Flossenwand-Stufenrost sowie Vorrichtung zur Durchführung des Verfahrens
CN105180143A (zh) * 2015-08-12 2015-12-23 神华集团有限责任公司 一种用于循环流化床锅炉的乏汽回收设备及系统
CN106195987A (zh) * 2016-08-30 2016-12-07 江苏太湖锅炉股份有限公司 高灰分低温余热锅炉
CN115751347B (zh) * 2023-02-13 2023-04-07 光大环保技术装备（常州）有限公司 水冷炉排温度和流量检测系统及其检测方法

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Publication number Priority date Publication date Assignee Title
FR739654A (fr) * 1900-01-01
DE493854C (de) * 1930-03-14 Babcock & Wilcox Dampfkessel W Aus wassergekuehlten, sich kreuzenden Rohren bestehender Rost fuer Kohlenstaubfeuerungen
DE561099C (de) * 1929-08-11 1932-10-10 Willi Thieme Feuerungsrost aus laengsliegenden Roststaeben, die zur Foerderung des Brennstoffes in Gruppen herausgezogen und in Richtung auf die Feuerbruecke zurueckgeschoben werden
DE808263C (de) * 1948-10-02 1951-07-12 Steinmueller Gmbh L & C Selbstfoerdernder, wassergekuehlter Planrost
US3599609A (en) * 1969-09-05 1971-08-17 Charles L Wellons Oven for burning waste wood products
DE3207433A1 (de) * 1982-03-02 1983-09-08 Rudolf Dr. 6800 Mannheim Wieser Wasserrohrkessel mit rostfeuerung
JPH0231523Y2 (fr) * 1985-04-23 1990-08-27
ES2137361T3 (es) * 1993-02-12 1999-12-16 L David Ostlie Parrilla apilada de refrigeracion y sistema de proporcionar energia termica para una planta de energia.
CH684118A5 (de) * 1993-04-20 1994-07-15 Doikos Investments Ltd Verfahren zum Verbrennen von Kehricht auf einem Verbrennungsrost sowie Verbrennungsrost zur Ausübung des Verfahrens und Rostplatte für einen solchen Verbrennungsrost.
JPH07180824A (ja) * 1993-12-22 1995-07-18 Mitsubishi Heavy Ind Ltd ストーカ
DE4400992C1 (de) * 1994-01-14 1995-05-11 Noell Abfall & Energietech Roststab und Rost mit Kühleinrichtung
DE19508899C2 (de) * 1995-03-11 1998-07-02 Erk Eckrohrkessel Wassergekühlter Schrägrost mit mechanischem Brennstoff- und Aschetransport
US6422161B2 (en) * 1995-03-23 2002-07-23 Theodor Koch Combustion grate and process for optimizing its operation
DE19528310A1 (de) * 1995-08-02 1997-02-06 Abb Management Ag Rost für eine Feuerungsanlage
JPH116613A (ja) * 1997-06-17 1999-01-12 Kubota Corp 火格子冷却機構

Also Published As

Publication number Publication date
KR20010030387A (ko) 2001-04-16
JP2001124324A (ja) 2001-05-11
ATE310209T1 (de) 2005-12-15
DE19943665A1 (de) 2001-03-15
NO20004547D0 (no) 2000-09-12
TW550362B (en) 2003-09-01
EP1085264A1 (fr) 2001-03-21
DE19943665B4 (de) 2006-04-13
DE50011615D1 (de) 2005-12-22
KR100659956B1 (ko) 2006-12-22
NO323854B1 (no) 2007-07-16
NO20004547L (no) 2001-03-14

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