WO2006119777A1 - A stepped grate for a waste incineration plant - Google Patents
A stepped grate for a waste incineration plant Download PDFInfo
- Publication number
- WO2006119777A1 WO2006119777A1 PCT/DK2006/000257 DK2006000257W WO2006119777A1 WO 2006119777 A1 WO2006119777 A1 WO 2006119777A1 DK 2006000257 W DK2006000257 W DK 2006000257W WO 2006119777 A1 WO2006119777 A1 WO 2006119777A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grate
- stepped
- bars
- accordance
- primary air
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H7/00—Inclined or stepped grates
- F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
- F23H7/08—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding reciprocating along their axes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/02—End fittings on bars
- F23H17/04—End fittings on bars of travelling-grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H1/00—Grates with solid bars
- F23H1/02—Grates with solid bars having provision for air supply or air preheating, e.g. air-supply or blast fittings which form a part of the grate structure or serve as supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/02—End fittings on bars
Definitions
- the present invention relates to a stepped grate for a waste incineration plant of the kind set forth in the preamble of claim 1.
- GB 1566382 shows a grate system with replaceable wear elements in which only part of the upper surface in contact with the burning material is replaceable and said wear elements are fixed to the grate system by means of relatively complex fixation means, comprising sliding grooves and bolts which are subjected to wear and contamination by grate screenings, such wear and contamination impeding the efficient function of the fixation means.
- Fig. 1 shows a vertical section through three succeeding stepped grates of an incineration plant
- Fig. shows a grate block in perspective
- Fig 3. shows a grate bar seen from the side
- Fig 4. shows a grate bar of Fig. 3 seen from above
- Fig 5. shows a grate bar of Fig. 3 and 4 seen in cross section along the line V-V, and
- Fig. 6 shows a grate bar for use in the upper row of a grate section.
- the stepped grate for a waste incineration plant shown in fig. 1 consists of three sections, each section comprising stationery and reciprocating grate girders.
- Each girder consists of a grate beam (2), on which grate blocks (1) are fixed. Every second grate girder is adapted to make reciprocating movements while the intermediate girders are stationary.
- Each grate block as shown in fig. 2, consists of two cast stringers (3, 4) mutually connected by two or four transverse steel rods (5).
- the grate block (1) is filled up with cast grate bars (6) which are resting on the steel rods (5).
- the grate bars are as shown in figs. 3-5, provided with suitable bearing elements for supporting the grate bars on the transverse steel rods (5).
- the fixation of the grate bars is provided by suitably forming the bearing elements with indentations at the bottom side of the grate bars, such that the insertion of the grate bars is made in an inclined direction onto the transverse steel rods (5).
- the next upper row of the grate bars provides a locking of the grate bars when inserted.
- the inclined insertion is provided by an angle ⁇ between a line through the transverse steel rods (5) and the insertion indentations, as indicated in Fig. 3, said angle preferably being between 80 ° and 45 °.
- the primary air for the combustion which enters into the furnace from below as seen in fig.
- the openings in the grate bars have an opening slope ⁇ down along the longitudinal sides, which in the preferred embodiment is approx. 14 °.
- the openings in the grate bars have an opening slope ⁇ down along the narrow end side, which in the preferred embodiment is approx. 14 °.
- the grate bars (6) are provided with indentations providing elongate openings and the grate block stringers (3, 4) have indentations which together can be optimised in order to provide a suitable level of cooling of the grate bar and a suitable pressure drop across the grate bars in order to avoid the tendency of ashes blocking the openings.
- the width of the grate bars is within the range 45-70 mm. and in the preferred embodiments shown in the drawings the width is 60 mm, other preferred widths are 55 mm, 55,5 mm and 60,5 mm.
- the broader grate bars provide a reduction in total weight of cast steel in the grate blocks of 15-20% whereby the cost price is reduced correspondingly.
- the intrinsic pressure drop over the grate in typical use condition is between 75 and 300 Pa.
- This relatively high pressure drop over the grate corresponds to a relatively high air velocity, whereby the primary air openings are kept open and free of ashes and waste material.
- the grate in accordance with the invention is suited to be used in connection with furnaces and grates which are designed to be used for incinerating waste for supplying heat to steam boilers with or without steam turbines for electric power generation.
- the upper row of grate bars are provided with an upstanding lip (8) providing an airtight connection to the transition plate to the next grate section or the inlet section of the waste incineration plant.
- the grate bars are mounted on the grate section starting from the lower end thereof and each subsequently mounted grate bar above a previously mounted grate bar locks the preceding grate bar in position due to the formation of the engagement means.
- the upper row of grate bars (6) on a grate beam (2) is inserted by tilting the grate beam (2), e.g. using a crow bar to lift the lower end of the grate beam (2) or by using a pulley tackle.
- the tilting of the grate beam (2) provides sufficient room for inserting the upper grate bars (1) in the inclined direction underneath the transition plate, and when the grate beam (2) is moved back to its mounting position the upper row of grate bars (1) are locked in position by engagement between the upstanding lip (8) and the transition plate.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008510413A JP2008540991A (en) | 2005-05-13 | 2006-05-15 | Stair grate for waste incineration plant |
EP06722943A EP1886066A1 (en) | 2005-05-13 | 2006-05-15 | A stepped grate for a waste incineration plant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200500702 | 2005-05-13 | ||
DKPA200500702 | 2005-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006119777A1 true WO2006119777A1 (en) | 2006-11-16 |
Family
ID=36644916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK2006/000257 WO2006119777A1 (en) | 2005-05-13 | 2006-05-15 | A stepped grate for a waste incineration plant |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1886066A1 (en) |
JP (1) | JP2008540991A (en) |
KR (1) | KR20080093855A (en) |
CN (1) | CN101198823A (en) |
TW (1) | TW200706808A (en) |
WO (1) | WO2006119777A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3779278A1 (en) | 2019-08-13 | 2021-02-17 | Saretco | Grid unit with tier for furnace grate of an incinerator, and corresponding support |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1566382A (en) * | 1977-03-09 | 1980-04-30 | Peters Ag Claudius | Grate plate |
FR2519738A1 (en) * | 1982-01-14 | 1983-07-18 | Von Roll Ag | GRID BAR FOR HOUSEHOLD GARBAGE INCINERATION PLANT |
US4494469A (en) * | 1982-05-13 | 1985-01-22 | Volund Miljoteknik A/S | Stepped grate for an incinerator plant |
EP1036986A1 (en) * | 1999-03-17 | 2000-09-20 | Ansaldo Voelund A/S | Stepped grate for a waste incineration plant |
US20040261674A1 (en) * | 2003-06-30 | 2004-12-30 | Halcyon Mechanical Services, Inc. | Grate block for a refuse incineration grate |
-
2006
- 2006-05-12 TW TW095116849A patent/TW200706808A/en unknown
- 2006-05-15 WO PCT/DK2006/000257 patent/WO2006119777A1/en not_active Application Discontinuation
- 2006-05-15 CN CNA2006800211260A patent/CN101198823A/en active Pending
- 2006-05-15 KR KR1020077029018A patent/KR20080093855A/en not_active Application Discontinuation
- 2006-05-15 EP EP06722943A patent/EP1886066A1/en not_active Withdrawn
- 2006-05-15 JP JP2008510413A patent/JP2008540991A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1566382A (en) * | 1977-03-09 | 1980-04-30 | Peters Ag Claudius | Grate plate |
FR2519738A1 (en) * | 1982-01-14 | 1983-07-18 | Von Roll Ag | GRID BAR FOR HOUSEHOLD GARBAGE INCINERATION PLANT |
US4494469A (en) * | 1982-05-13 | 1985-01-22 | Volund Miljoteknik A/S | Stepped grate for an incinerator plant |
EP1036986A1 (en) * | 1999-03-17 | 2000-09-20 | Ansaldo Voelund A/S | Stepped grate for a waste incineration plant |
US20040261674A1 (en) * | 2003-06-30 | 2004-12-30 | Halcyon Mechanical Services, Inc. | Grate block for a refuse incineration grate |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3779278A1 (en) | 2019-08-13 | 2021-02-17 | Saretco | Grid unit with tier for furnace grate of an incinerator, and corresponding support |
FR3099949A1 (en) | 2019-08-13 | 2021-02-19 | Saretco | Stepped grate block for incinerator furnace hearth, and corresponding support |
Also Published As
Publication number | Publication date |
---|---|
TW200706808A (en) | 2007-02-16 |
KR20080093855A (en) | 2008-10-22 |
JP2008540991A (en) | 2008-11-20 |
CN101198823A (en) | 2008-06-11 |
EP1886066A1 (en) | 2008-02-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10670266B2 (en) | Grate bar for a furnace comprising engaging means | |
US4676176A (en) | Furnace grate | |
CA1285182C (en) | Inclined grate apparatus for use in the combustion chamber of a combustion furnace | |
US6964237B2 (en) | Grate block for a refuse incineration grate | |
US4569437A (en) | Inclined furnace grate with at least one movable grate bar | |
EP1886066A1 (en) | A stepped grate for a waste incineration plant | |
US4475468A (en) | Incinerator with moving-bed stoker | |
EP1036986B1 (en) | Stepped grate for a waste incineration plant | |
US20060000396A1 (en) | Grate panel, as well as corresponding incineration grate and waste incineration plant | |
US6155184A (en) | Process for incinerating solids on a water-cooled thrust combustion grate, and a grate plate and grate for accomplishing the process | |
JP2012507688A (en) | Air-cooled grate block | |
CZ249297A3 (en) | Grate plate | |
KR102599299B1 (en) | Air-cooled grate for incinerator | |
KR100231495B1 (en) | Grate for incineration of domestic waste | |
CA2070980C (en) | Sidewall guide for combustion grates | |
CA1224975A (en) | Inclined grate for furnaces | |
KR101501369B1 (en) | Arrangement structure of grates in incinerator | |
US6196143B1 (en) | Clip having sloped sides | |
RU1770707C (en) | Fire bar of roasting and sintering conveyer machines | |
CN210425066U (en) | Grate sliding frame | |
CN110686262B (en) | Fire grate for garbage incineration and garbage incineration treatment device | |
KR200439983Y1 (en) | Fire grate and bar supporting the same | |
KR960004892Y1 (en) | Grate | |
RU2212585C2 (en) | Fire grate | |
CN112610955A (en) | Combined grate bar structure of incinerator grate |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2008510413 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006722943 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020077029018 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: RU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200680021126.0 Country of ref document: CN |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: RU |
|
WWP | Wipo information: published in national office |
Ref document number: 2006722943 Country of ref document: EP |