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WO1999057490A1 - Chaudiere a charbon - Google Patents

Chaudiere a charbon Download PDF

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Publication number
WO1999057490A1
WO1999057490A1 PCT/KR1998/000337 KR9800337W WO9957490A1 WO 1999057490 A1 WO1999057490 A1 WO 1999057490A1 KR 9800337 W KR9800337 W KR 9800337W WO 9957490 A1 WO9957490 A1 WO 9957490A1
Authority
WO
WIPO (PCT)
Prior art keywords
ash
duct portion
boiler
duct
unit
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.)
Ceased
Application number
PCT/KR1998/000337
Other languages
English (en)
Inventor
Dong Suk Choi
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.)
CHEON HAE BOILER Co Ltd
Original Assignee
CHEON HAE BOILER Co Ltd
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
Priority claimed from KR2019980007097U external-priority patent/KR19980025082U/ko
Priority claimed from KR1019980015821A external-priority patent/KR19980033627A/ko
Priority claimed from KR2019980007098U external-priority patent/KR19980025083U/ko
Priority claimed from KR2019980007099U external-priority patent/KR200204159Y1/ko
Application filed by CHEON HAE BOILER Co Ltd filed Critical CHEON HAE BOILER Co Ltd
Publication of WO1999057490A1 publication Critical patent/WO1999057490A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/16—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support
    • 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
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/10—Under-feed arrangements
    • F23K3/12—Under-feed arrangements feeding by piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/44—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40

Definitions

  • This invention relates to a coal-fueling boiler, particularly to an improved coal boiler with high thermal efficiency and much less environment pollution by improving the structure of a heat exchanging duct, an ash crushing unit to crush coal ash into a certain size and an ash discharging unit to discharge the crushed ash.
  • the boilers can be classified by their fuel, for instance, oil, gas or coal.
  • a coal boiler is proper for heating larger space, e. g., big-sized vinyl greenhouse, for its high thermal efficiency and economic advantage for cheap fuel.
  • a coal boiler is described in the Korean Patent Publication No. 93-8819.
  • the published boiler comprises; a water path(12) wherein water circulates, a duct portion(20) where heat exhanging occurs in contact with the water path(12), a heating unit(30) to provide heat into the duct portion(20), a coal feeding unit(40) to feed coal to the heating unit(30) from a coal storage(l), an ash crushing unit (50) to crush the ash produced in the heating unit and a ash discharging unit(60) to discharge the crushed ash from the boiler.
  • the coal feeding unit(40) comprises a piston(42) which slidingly moves at l the outlet of the coal storage(l), a first link(43) driven by a motor(41) for reciprocally moving the piston(42), a switching panel(44) to open and close the outlet of the coal storage(l) according to the reciprocal movement of the piston(42) and a second link(45) powered by the motor(41) to operate the switching panel(44).
  • the boiler has, however, some defects as below.
  • the thermal efficiency of the boiler is limited by area of the duct portion (20) since the heat exchanging occurs only at the surface of the duct portion(20) no matter how the duct portion(20) is arranged. Secondly, it pollutes air with powder ash which is emitted out along with the discharged heated air through the duct portion(20).
  • the life of the crusher is shortened because the edges of the crusher are damaged in crushing the coal ash which usually contains some unburned coal .
  • the present invention is made for solving the above problems of the prior art.
  • a boiler comprising a heat exchanging portion having an water path wherein water circulates and a duct portion installed in contact the water path with a plurality of water tubes penetrating the duct portion in which the water moves, a heating unit to provide heat by burning solid fuel into the duct portion where heat-exchange occurs, a fuel feeding unit having fuel storage to feed fuel to the heating unit, an ash crushing unit to crush the ash produced from the heating unit into a certain size, and an ash discharging unit to discharge the crushed ash.
  • the duct portion comprises a first duct section which extends upwardly from
  • the heating unit a second duct section which extend downwardly from the first duct section and a third duct section which extends upwardly again from the second duct section.
  • a plurality of impeding plates are installed in a certain interval on the inner surface of the duct portion.
  • the fuel feeding unit comprises a piston slidingly moves at the outlet of the fuel storage, a plurality of links to operate the piston in reciprocating motion powered by a motor, a switching panel to rotate to open and shut the outlet corresponding to the motion of the piston, and a chain to connect a sprocket of the switching panel with the sprocket of the motor .
  • the heating unit comprises a fire grate on which fuel is placed, a fan under the fire grate to provide air to the fire grate, a subhousing having a guiding panel attached to the fire grate to guide air provided by the fan to the duct portion.
  • the ash crushing unit comprises a supporting member rotatably supported by the boiler body, a shaft extended from the supporting member having a polygonal setting part; a movable axle slidingly movable along the setting part; and a plurality of blades with plural edges installed on the movable axle in a certain interval.
  • the point angle of the edges is formed to be acute angle so that the coal ash is easily crushed with less impact force.
  • the ash discharging unit where coal ash stacks dropping from the ash crushing unit, comprises an ash collecting bucket having an outlet on its side wall , a screw conveyer rotatably supported by the ash collecting bucket , a fixing plate fixed on one side wall of the ash collecting bucket having
  • thermal efficiency increases a lot by installing a plurality of water tubes to pass through the duct portion and emission of ash powder is restrained to prevent air pollution by a plurality of impeding plates installed on the inner surface of the duct portion.
  • the blades are combined to the movable axle to decrease impact shock in crushing coal ash so that the edge's life is lengthened.
  • Fig. 1 and Fig 2 are cross sectional view and a perspective view partly broken away of a conventional coal burning boiler.
  • Fig.3 is a cross sectional view of a coal burning boiler according to the present invention.
  • Fig. 4a and 4b illustrate the operation of the fuel feeding unit of the boiler according to the present invention.
  • Fig. 5 is a perspective view of the ash crushing unit and ash discharging unit of the boiler according to the present invention.
  • Fig 6 is an assembling view showing how the ash crushing unit of the boiler according to the present invention is assembled.
  • Fig. 7 is a sectional view of the ash crushing unit and ash discharging unit of the boiler according to the present invention.
  • Fig.8 is a perspective view showing the ash discharging unit of the boiler according to the present invention. Best Mode for Carrying Out the Invention
  • the boiler according to the present invention comprises a heat exchanging portion(ll ⁇ ) having a water path(lll) where water circulates and a duct portion(120) in contact with the water path(lll) accomodating a plurality of water tubes installed in a certain interval to penetrate the duct port ion(120) so that heat-exchanging occurs; a heating unit (130) to provide heat to the duct port ion(120); a fuel feeding unit(160) to provide coal to the heating unit(130); an ash crushing unit to crush the coal ash produced from the heating unit(130); and an ash discharging unit(150) to discharge the crushed coal ash.
  • the duct portion(120) has a first duct portion(121) upwardly extended from the heating unit(130), a second duct portion(122) downwardly extended from the first duct portion(121), and a third duct portion(123) upwardly extended from the second duct portion(122) .
  • the second duct portion(122) comprises a plurality of impeding plates(125) installed in a certain interval to prevent the powdered ash traveling along with combustion gas. Each impeding plate(125) has a hole(125a) through which the combustion gas passes. The neighbouring holes(125a) are arranged in zigzag.
  • the fuel feeding unit (160) comprises apiston(161) slidingly moving at the outlet of the fuel storage(170), a plurality of links(162) powered by a motor(200) to operate the piston(161) to reciprocate, and a switching panel (171) to open or shut the outlet of the fuel storage(170) simultaneously to the reciprocating motion of the ⁇ iston(161).
  • a sprocket of the axle(171a) of the switching panel (171) is connected with a sprocket(201) of the motor(200) by a chain(202) so that the switching
  • FIG. 6 panel(171) is rotated by the motor(200). As illustrated in Fig. 4a, the switching panel (171) shut the outlet of the fuel storage(170) when the piston(161) moves back from the heating unit(130).
  • Fig.4b shows that the switching panel(171) opens the outlet when the piston(161) moves toward the heating unit (130) and then a certain amount of the coal moves down onto the piston(161). When the piston(161) moves back as shown in Fig.4a, the coal on the piston(161) falls down ahead of the piston(161).
  • the heating unit(130) comprises a fire grate(131) whereon the coal provided from the fuel feeding unit(160), a fan(135) installed below the fire grate(131) to provide air to the fire grate(131), and a subhousing(133) to support the fire grate(131).
  • a guiding panel(132) is further installed in the subhousing(133) to lead air to the duct portion(120) via the fire grate(131).
  • the ash crushing unit(140) as shown in the Fig. 4 and 5, comprises a supporting member(141a) rotatably supported by the body of the boiler, a shaft(141) having a setting part(141b) of polygonal shape, a movable axle(142) connected with the setting part(141b) to be slidable along the axle, and blades(143) combined with the movable axle(142) in a certain interval having a plurality of edges(143a).
  • Each of the blades(143) could be directly connected with the setting part (141b).
  • the hem of the edges is formed to make an acute angle so that crushing the ash is easi ly performed with less impact shock.
  • the ash discharging unit(150) referring to the Figs. 6 and 7, comprises an ash collecting bucket (151) to receive the coal ash falling from the ash crushing unit(140), a screw conveyer(153) rotatably installed in the ash collecting bucket(151), a fixing plate(152) fixed at a side wall of the ash collecting bucket(151) having a ash discharging hole(152a), a
  • the boiler of the present invention having the above structure works as below.
  • a certain amount of the coal dropped from the fuel storage(170) is provided to the fire grate(131) by the fuel feeding unit(160).
  • the switching panel (171) shuts the outlet of the fuel storage(170) when the piston(l ⁇ l) moves back from the heating unit (130) and, as shown in the Fig. 4b, the switching panel (171) opens the outlet when the piston(l ⁇ l) moves toward the heating unit(130) so that a certain amount of coal is provided to the upper plate of the piston(161).
  • the coal provided to the upper plate of the piston(161) drops ahead of the piston(l ⁇ l) when the piston(161) moves back, as shown in the Fig.4a.
  • the coal dropped ahead of the piston(161) is carried to the heating unit(130) as the ⁇ iston(161) moves forward.
  • the coal provided as above is burned on the fire grate(131) and the heat generated from the burning coal is provided to the duct port ion(120) .
  • the air from the fan(135) helps the coal burnt and facilitates the circulation of the heat in the duct portion(120).
  • the air is guided to the burning coal by the guiding panel (132).
  • the thermal transfer occurs between the heat guided along the duct portion(120) and the water circulating through the water tubes(124) and the heat exchanging ⁇ ortion(ll ⁇ ).
  • the powdered dust like coal ash included in the combust ion gas is restrained from being emitted by the impeding plate(125) in the duct portion(120) .
  • the efficiency of thermal exchange in the duct portion(120) is improved since the impeding plate(125) having the hole(125a) makes turbulence of the hot air moving along the duct portion(120) .
  • the fuel feeding unit(160) provides coal in a certain interval of time and the newly provided coal pushes the burnt coal toward the ash crushing unit (140).
  • the burnt or partially-burnt coal ash is crushed by the rotating blades(143).
  • the acute angled edges(143a) of the blades(143) easily crushes the coal ash.
  • the impact shock is reduced as the movable axle(142) slides along the shaft (141) so that the damage to the edges(143a) is consequent ly reduced to improve the durabi 1 i ty of the edges(143a).
  • the crushed coal ash falls down to the ash collecting bucket(151) and then is discharged through the ash discharging hole(152a) by the rotating screw conveyer( 153) .
  • the operation of the screw conveyer(153) is stabilized as the screw conveyer(153) is supported by the supporter(154) at the middle of the screw conveyer to produce less noise and vibration.
  • the boiler of the present invention has the following advantages.
  • the boiler of the present invention highly improves the thermal efficiency for a plurality of water tubes are placed to pass the duct portion. Consequently the boiler is more economical than the conventional one.
  • the boiler improves environmental protection for the impeding
  • the life of the edges of the blades is lengthened for the blades combined to the movable axle which is movable along the shaft diminishing direct impact shock in crushing the coal ash.
  • the operation of the boiler is performed with much less noise and vibration for the screw conveyer of the ash discharging unit is supported by the supporter.
  • the structure of the boiler is simple and requires less power for the switching panel is linked by chain with the motor which operates the piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)

Abstract

L'invention concerne une chaudière perfectionnée permettant un rendement thermique amélioré et une pollution atmosphérique moindre. Cette chaudière comporte une portion échangeuse de chaleur (110) possédant un trajet d'eau (111) dans lequel l'eau circule, et une portion conduit (120) se trouvant en contact avec le trajet d'eau (111), une pluralité de tubes d'eau (124) pénétrant dans la portion conduit (120) et dans lesquels l'eau circule; une unité de chauffage (130) destinée à fournir de la chaleur, en brûlant du combustible solide, dans la partie conduit (120) où s'effectue l'échange de chaleur; une unité d'alimentation en combustible (160) disposant d'une réserve de combustible pour alimenter en combustible l'unité de chauffage (130); une unité de broyage de cendres (140) destinée à réduire à une certaine dimension les cendres produites par l'unité de chauffage; et une unité d'évacuation de cendres (150) destinée à évacuer les cendres broyées. La portion conduit (120) comprend une première section de conduit (121) s'étendant vers le haut depuis l'unité de chauffage (130), une deuxième section de conduit (122) s'étendant vers le bas depuis la première section de conduit (121), et une troisième section de conduit (123) s'étendant vers le haut depuis la deuxième section de conduit (122).
PCT/KR1998/000337 1998-05-01 1998-10-27 Chaudiere a charbon Ceased WO1999057490A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
KR1998/7099U 1998-05-01
KR2019980007097U KR19980025082U (ko) 1998-05-01 1998-05-01 석탄 보일러
KR1019980015821A KR19980033627A (ko) 1998-05-01 1998-05-01 석탄 보일러
KR1998/15821 1998-05-01
KR2019980007098U KR19980025083U (ko) 1998-05-01 1998-05-01 보일러의 탄재배출장치
KR2019980007099U KR200204159Y1 (ko) 1998-05-01 1998-05-01 파쇄기
KR1998/7097U 1998-05-01
KR1998/7098U 1998-05-01

Publications (1)

Publication Number Publication Date
WO1999057490A1 true WO1999057490A1 (fr) 1999-11-11

Family

ID=69570454

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1998/000337 Ceased WO1999057490A1 (fr) 1998-05-01 1998-10-27 Chaudiere a charbon

Country Status (2)

Country Link
CN (1) CN1115520C (fr)
WO (1) WO1999057490A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006203642B2 (en) * 2006-01-24 2010-05-13 Beijing Guodian Futong Science And Technology Development Co. Ltd Dry slag discharge device for coal-fired boiler
AU2006203646B2 (en) * 2006-01-24 2010-05-13 Beijing Guodian Futong Science And Technology Development Co. Ltd Dry slag discharge device for coal-fired boiler
EP2884200A1 (fr) 2013-12-13 2015-06-17 Marian Strzelczyk Chaudière de chauffage central
EP2375154A3 (fr) * 2010-04-07 2017-12-27 KWB - Kraft und Wärme aus Biomasse Gesellschaft m.b.H. Dispositif de chauffage
CN108731007A (zh) * 2018-06-28 2018-11-02 西安交通大学 一种电站锅炉灰斗破焦防止锅炉灭火装置
CN113390098A (zh) * 2021-06-21 2021-09-14 华能巢湖发电有限责任公司 一种锅炉疏水扩容器汽水热量回收方法及设备

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1299081C (zh) * 2002-12-11 2007-02-07 刘毅 蹲式锅炉
CA2824229A1 (fr) * 2010-12-28 2012-07-05 Zhuhong Wang Poele a prevention de collage de scories
CN102788358A (zh) * 2011-05-17 2012-11-21 李中庆 风冷式干排渣系统机械排渣机
CN103776048A (zh) * 2014-02-11 2014-05-07 武安市嘉恒节能科技有限公司 生物质燃料炉加料机构
US9890344B2 (en) * 2014-06-17 2018-02-13 Hankook Technology Inc. Apparatus for dust reduction and dispersion supply of input coal in system for drying coal using reheat steam
CN105864812B (zh) * 2016-04-07 2018-04-10 广西贵港市宏利生物能源科技有限公司 燃烧机的燃料输送装置
CN105733814A (zh) * 2016-04-07 2016-07-06 广西贵港市宏利生物能源科技有限公司 檀香精油的蒸馏生产方法及设备
CN107062289A (zh) * 2017-04-09 2017-08-18 贵州大学 一种回风炉半自动给料装置
CN107327858B (zh) * 2017-05-16 2020-03-20 北京国电富通科技发展有限责任公司 燃煤锅炉炉底排渣装置、排渣方法及排渣系统
CN111023159A (zh) * 2019-12-26 2020-04-17 兖矿集团有限公司 一种供暖炉具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474117A (en) * 1981-04-28 1984-10-02 Paul Marollaud Boiler using a solid granulated fuel
WO1984004955A1 (fr) * 1983-06-08 1984-12-20 Rheinische Braunkohlenw Ag Convoyeur a vis pour l'evacuation de residus solides a temperature elevee et en surpression

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474117A (en) * 1981-04-28 1984-10-02 Paul Marollaud Boiler using a solid granulated fuel
WO1984004955A1 (fr) * 1983-06-08 1984-12-20 Rheinische Braunkohlenw Ag Convoyeur a vis pour l'evacuation de residus solides a temperature elevee et en surpression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LEDINEGG, Maximilian, Dampferzeugung, Vienna: Springer Verslg, 1952, page 57, fig. 70a; page 69, fig. 85. *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006203642B2 (en) * 2006-01-24 2010-05-13 Beijing Guodian Futong Science And Technology Development Co. Ltd Dry slag discharge device for coal-fired boiler
AU2006203646B2 (en) * 2006-01-24 2010-05-13 Beijing Guodian Futong Science And Technology Development Co. Ltd Dry slag discharge device for coal-fired boiler
EP2375154A3 (fr) * 2010-04-07 2017-12-27 KWB - Kraft und Wärme aus Biomasse Gesellschaft m.b.H. Dispositif de chauffage
EP2884200A1 (fr) 2013-12-13 2015-06-17 Marian Strzelczyk Chaudière de chauffage central
CN108731007A (zh) * 2018-06-28 2018-11-02 西安交通大学 一种电站锅炉灰斗破焦防止锅炉灭火装置
CN108731007B (zh) * 2018-06-28 2023-07-25 西安交通大学 一种电站锅炉灰斗破焦防止锅炉灭火装置
CN113390098A (zh) * 2021-06-21 2021-09-14 华能巢湖发电有限责任公司 一种锅炉疏水扩容器汽水热量回收方法及设备
CN113390098B (zh) * 2021-06-21 2024-06-07 华能巢湖发电有限责任公司 一种锅炉疏水扩容器汽水热量回收方法及设备

Also Published As

Publication number Publication date
CN1261949A (zh) 2000-08-02
CN1115520C (zh) 2003-07-23

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