EP0242097A1 - Solid fuel boiler - Google Patents

Solid fuel boiler Download PDF

Info

Publication number
EP0242097A1
EP0242097A1 EP87302963A EP87302963A EP0242097A1 EP 0242097 A1 EP0242097 A1 EP 0242097A1 EP 87302963 A EP87302963 A EP 87302963A EP 87302963 A EP87302963 A EP 87302963A EP 0242097 A1 EP0242097 A1 EP 0242097A1
Authority
EP
European Patent Office
Prior art keywords
frame
solid fuel
tubes
boiler
fuel boiler
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Withdrawn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
EP87302963A
Other languages
German (de)
English (en)
French (fr)
Inventor
William John Holden
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.)
HOLDEN HEAT (UK) Ltd
Original Assignee
HOLDEN HEAT (UK) 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
Application filed by HOLDEN HEAT (UK) Ltd filed Critical HOLDEN HEAT (UK) Ltd
Publication of EP0242097A1 publication Critical patent/EP0242097A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G3/00—Rotary appliances
    • F28G3/06—Rotary appliances having articulated tools, e.g. assembled in chain manner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/04—Non-rotary, e.g. reciprocated, appliances having articulated tools, e.g. assembled in chain manner

Definitions

  • This invention relates to a solid fuel boiler.
  • a solid fuel boiler which has a heat exchanger above the fuel bed.
  • the heat exchanger comprises a plurality of vertically disposed tubes within each of which is an elongate means (for example, a chain) which depends from a support member which can be driven, at will, by a motor in order to cause said elongate means to scrape off or dislodge any soot or other powdery deposits from the inner surfaces of the tubes.
  • the support member is mounted on four eccentric cranks, and said support member and its eccentric cranks are located in a chamber into which the upper ends of the tubes open and which is also in communication with the boiler flue.
  • the support Upon operation of the motor, the support is moved horizontally on its cranks in an orbital path by said motor with consequent dis­lodgement of all of the fly ash and soot from the tubes by the elongate means.
  • Other features of the solid fuel boiler are disclosed in said Specifications but it is not considered to be necessary to describe all of them in the present Specification.
  • the solid fuel boiler described and claimed in said Specifications works very well but it is now considered that it will be an advantage to remove all (or a considerable proportion) of the bearing elements, which are associated with the support member, from the area in which they are or are liable to be subjected to high temperatures and/or to foul chemical/abrasive conditions.
  • the principal aim of the present invention is, therefore, to provide a solid fuel boiler which obtains the advantage mentioned in the preceding paragraph and which does so in a simple, effective and cheap manner.
  • a solid fuel boiler comprising: a boiler framework; parts of said boiler framework defining a chamber; vertically disposed tubes mounted in said boiler to act as a heat exchanger, each of said tubes having an inside surface and upper and lower ends; a frame disposed above the upper ends of said tubes and within said chamber which is in direct communication both with said tubes and with a flue by means of which hot air and combustion products are vented from the boiler; flexible means connected between said frame­work and said frame; chains inside said tubes, each chain consist­ing of interconnected links and extending lengthways of the respective one of said tubes, and each chain having a first end attached to said frame and hanging downwardly from said frame; drive means located wholly outside said chamber and connected by a coupling device to said frame and operable to move said frame in an horizontal orbital path such that each chain is caused to move in a corresponding orbital path in order to scrape the whole of the inside surface of the respective tube, said flexible means contributing to
  • the drive means preferably include a motor drivingly connected to a train of gears of which at least one gear has an eccentric connection to one end of a rod whose other end is fixed to said frame.
  • said one end of the rod may be fixed to a driving arm which is connected eccentrically to each of two spur gears of said train, said train further including a pinion attached to the driving shaft of said motor and meshing with the teeth of intermediate idler gears each of which is also in mesh with a respective one of said spur gears, whereby the rotation of the spur gears is converted into orbital movement of the rod.
  • said first ends of said chains may be connected to said frame by swivel devices each of which permits (during operation of said drive means) random rotation of the respective chain within the respective tube relatively to said frame.
  • a boiler as described in any one of the three preceding paragraphs may include a pot type underfeed stoker, a rotatable conveyor screw driven to feed coal along a tube to a retort surmounted by tuyeres which are connected by way of a plenum chamber to forced-draught means which supply primary air to said retort, and a device by means of which secondary air is directed onto the fuel bed (which is supported by said retort) from above.
  • Said device preferably takes the form of or is included in a so-­called reflective arch, at least some of said chains being long enough to make contact with and thus to clean at least the top of the reflective arch.
  • the flexible means preferably consist of at least one depending chain whose upper end is connected to said framework and whose lower end is connected to the frame; in a preferred embodiment, two such chains will be provided, these being connected to horizontally spaced points on the framework and to corners of the frame.
  • the flexible means may consist of flexible spring mountings connected between the underside of the frame and the framework; indeed, said mountings could be connected to suitable parts of the heat exchanger between the adjacent open upper ends of the tubes.
  • a solid fuel boiler 5 which has a multi-component framework of which one component is indicated by the reference numeral 6 in Figure 2.
  • the boiler 5 includes a heat exchanger 10 having vertically arranged tubes 11 through which flue gases (gas-­borne dust and other products of combustion) will pass from the fuel bed (not illustrated) to a flue pipe connection 12.
  • flue gases gas-­borne dust and other products of combustion
  • the frame 13 consists of two sets of parallel rods 15 so arranged that the rods of one set cross those of the other set, the rods being welded or otherwise secured to one another at the crossing points.
  • a chain 40 ( Figure 1) is suspended from each crossing point of the sets of rods 15, thereby providing twenty-five chains in the illustrated embodiment, and it will be understood from what is disclosed in said Specifications that each crossing point is so placed (relatively to the respective tube 11 beneath the frame 13) that each chain hangs down into a respective one of the tubes 11 and is in contact with the inside surface of said tube over the entire length of said tube.
  • the chains 40 are illustrated diagrammati­cally by interrupted lines in Figure 1, it being well understood both from said Specifications and generally what is meant by a chain. Moreover, it has been discovered during use of the boiler that it is desirable to connect each chain to the respective crossing point by means of a swivel device which is not shown in the accompanying drawings but which is shown in said Specifications and which is well-known in itself and which comprises two closed eyes or rings which are so interconnected as to be capable of rotation through 360° one relatively to the other.
  • the retiform frame 13 has a plate 16 secured thereto and one end portion of a rod 17 is secured to the plate.
  • the rod 17 extends through a rectangular slot 18 formed in a wall 19 which forms part of the heat exchanger.
  • a bracket 20 is mounted on said wall 19 in any suitable manner (for example, by welding) and a motor 21, preferably an electric motor, is secured to said bracket by screws or bolts 22.
  • the motor has a driving shaft 23 to which is connected a pinion 24 which meshes, at diametrically opposed positions thereon, with two identical idler gears 25.
  • Each idler gear 25 meshes, at a point diametrically opposite to the one at which it meshes with the pinion 24, with a respective one of two spur gears 26.
  • An appropriately apertured L-shaped driving arm 27 is connected at two points 28 to the spur gears 26, the connection being made in each case by a drive pin 29 of which one screw-threaded end is screwed into a tapped hole formed in the respective gear 26 and of which the other screw-threaded end extends through the respective aperture in the arm 27 and has a washer and nut placed thereon.
  • the free end of the short limb of the L-­shaped arm 27 is secured, as indicated by the reference numeral 31, to that end of the rod 17 which is remote from the plate 16.
  • a flexible gaiter 32 encircles the rod 17 at 33 and provides a gas-tight seal therewith and is fixed (as illustrated and as indicated by the reference numeral 34) to the wall 19 in a gas-tight manner, the fixing at 34 preferably following the rectangular shape of the slot 18.
  • the actual shape of the slot may be other than rectangular.
  • That side of the frame 13 which is remote from the plate 16 is connected to the framework 6 by a pair of chains 35 of which one can be most clearly seen in Figure 1; the upper end of each chain is connected to a hook 36 which is secured to the framework 6 and the lower end of each chain is connected to the hooked free end 37 of a respective one of the rods 15.
  • the motor 21 is energised in order to rotate the pinion 24.
  • Rotation of said pinion rotates the two idler gears 25 which, in turn, rotate the two spur gears 26.
  • Rotation of the gears 26 causes the eccentric points 28 to rotate about the respective axes of rotation of said gears 26 and this causes the driving arm 27 to move horizontally in an orbital path. Therefore, the rod 17 and the frame 13 are also caused to move horizontally in an orbital path, with the consequence that the several chains depending from the frame scrape over the inner surfaces of the tubes 11 and clean them.
  • the chains 35 have the desired flexibility to keep the frame in its proper attitude whilst said frame moves orbitally. The gas-borne dust and other products of combustion are prevented from reaching the gear train by the gaiter 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP87302963A 1986-04-17 1987-04-06 Solid fuel boiler Withdrawn EP0242097A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8609370A GB2189305B (en) 1986-04-17 1986-04-17 Solid fuel boiler
GB8609370 1986-04-17

Publications (1)

Publication Number Publication Date
EP0242097A1 true EP0242097A1 (en) 1987-10-21

Family

ID=10596353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302963A Withdrawn EP0242097A1 (en) 1986-04-17 1987-04-06 Solid fuel boiler

Country Status (3)

Country Link
EP (1) EP0242097A1 (da)
DK (1) DK199687A (da)
GB (1) GB2189305B (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017200677A3 (en) * 2016-05-16 2017-12-28 General Electric Company Self-cleaning heat exchange assembly
JP2021038874A (ja) * 2019-09-02 2021-03-11 株式会社Ｈｉｎｏ−Ｔｅｃ ダスト除去装置及びダスト除去装置付きチューブ式熱交換器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513698A (en) * 1994-06-20 1996-05-07 Paul Mueller Company Balanced drive for orbital tube whip rod heat exchanger
DE19623108A1 (de) * 1996-06-10 1997-12-11 Konrad Weigel Abgaswärmetauscher
CN101907420B (zh) * 2010-08-06 2012-07-04 北京化工大学 换热管内多孔组合式挂件

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE242423C (da) *
DE1003905B (de) * 1953-08-25 1957-03-07 Rudolf Hingst Dipl Ing Vorrichtung zur rauchgasseitigen Reinigung der Rohre von Waermeaustauschern mittels Ketten
GB774299A (en) * 1954-05-20 1957-05-08 William Herbert Smith Improvements in boilers
GB1123741A (en) * 1965-02-13 1968-08-14 Svenska Carbon Black Aktiebola Improvements relating to coolers for mixtures of gases and solid particles
GB2124322A (en) * 1982-07-20 1984-02-15 Holden William J Heat exchanger cleaner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE242423C (da) *
DE1003905B (de) * 1953-08-25 1957-03-07 Rudolf Hingst Dipl Ing Vorrichtung zur rauchgasseitigen Reinigung der Rohre von Waermeaustauschern mittels Ketten
GB774299A (en) * 1954-05-20 1957-05-08 William Herbert Smith Improvements in boilers
GB1123741A (en) * 1965-02-13 1968-08-14 Svenska Carbon Black Aktiebola Improvements relating to coolers for mixtures of gases and solid particles
GB2124322A (en) * 1982-07-20 1984-02-15 Holden William J Heat exchanger cleaner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017200677A3 (en) * 2016-05-16 2017-12-28 General Electric Company Self-cleaning heat exchange assembly
US10365052B2 (en) 2016-05-16 2019-07-30 General Electric Company Self-cleaning heat exchange assembly
JP2021038874A (ja) * 2019-09-02 2021-03-11 株式会社Ｈｉｎｏ−Ｔｅｃ ダスト除去装置及びダスト除去装置付きチューブ式熱交換器

Also Published As

Publication number Publication date
GB8609370D0 (en) 1986-05-21
DK199687D0 (da) 1987-04-15
DK199687A (da) 1987-10-18
GB2189305A (en) 1987-10-21
GB2189305B (en) 1990-01-04

Similar Documents

Publication Publication Date Title
EP0242097A1 (en) Solid fuel boiler
TW283098B (en) Single impact rapping hammer system and method for cleaning tube units
US5001992A (en) Apparatus for regulating air flow through an air port of a chemical recovery furnace
CN110142267A (zh) 一种管内清扫机器人
US4471725A (en) Heat exchanger cleaner
US4505000A (en) Chimney cleaning apparatus
US4748004A (en) Apparatus for cleaning air ports of a chemical recovery furnace
GB2124322A (en) Heat exchanger cleaner
JPS5844163B2 (ja) 廃熱ボイラの除塵用振動装置
CN212057332U (zh) 一种可实现煤部分气化燃烧的链条炉排
PT790464E (pt) Grelha de combustao especialmente para instalacoes de incineracao de residuos solidos
US4594745A (en) Apparatus for cleaning chimneys
US3447289A (en) Collector tube rapper system
KR200144179Y1 (ko) 여과포의 교환이 용이한 백 필터식 집진기
CA2130367C (en) Modular chimney cleaning apparatus
CN220229228U (zh) 一种丝杆传动的机械清灰装置
CN220282449U (zh) 一种火电厂锅炉的落煤管
CN213543250U (zh) 火焰漂浮炉余热利用装置
CN216307850U (zh) 一种组合式耐低温腐蚀空气预热器
CN219913040U (zh) 一种流化床锅炉的飞灰回送装置
RU1835304C (ru) Аппарат дл очистки отход щих газов
CN217899903U (zh) 一种焚烧炉进气管结构
CN213995180U (zh) 一种防雨型的布袋除尘设备用的声波抑尘装置
WO2024114010A1 (zh) 带粉尘清理输送功能的烧结炉
SU1431876A1 (ru) Устройство дл очистки внутренней поверхности труб

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19870413

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19880422

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HOLDEN, WILLIAM JOHN