CN101198823A - A stepped grate for a waste incineration plant - Google Patents
A stepped grate for a waste incineration plant Download PDFInfo
- Publication number
- CN101198823A CN101198823A CNA2006800211260A CN200680021126A CN101198823A CN 101198823 A CN101198823 A CN 101198823A CN A2006800211260 A CNA2006800211260 A CN A2006800211260A CN 200680021126 A CN200680021126 A CN 200680021126A CN 101198823 A CN101198823 A CN 101198823A
- Authority
- CN
- China
- Prior art keywords
- grate
- stepped
- bar
- fire grate
- primary air
- 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.)
- Pending
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Classifications
-
- 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
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
Grate bar (6) for use in a stepped grate for a waste incineration plant, said stepped grated consisting of grate blocks (1 ) placed in adjacent rows and in succession in the advancing, direction of the waste and resting on parallel grate beams (2) in which every second row of grate blocks (1) are adapted to make a reciprocating movement while the intermediate rows of grate blocks (1) are stationary, each grate block, comprising: two stringers (3, 4) mutually connected by two (half blocks) or four transverse steel rods (5) and each grate block (1) being filled up with loose, vertically hanging cast grate bars (6) resting on said steel rods (5), said grate bars (6) comprising indentations along their abutting sides forming openings for admitting primary air for the combustion, said primary air also providing the necessary cooling of the grate bars (6).The indentations along the abutting sides are formed as one single elongate indentation positioned centrally on at least one side of each grate bar (6). This provides a grate bar of simple construction at a reduced price.
Description
Technical field
The present invention relates to a kind of at the illustrated stepped grate that is used for apparatus for incinerating waste material of claim 1 preamble.
Background technology
GB1566382 has shown a kind of fire grate system that has removable abrasive element, it is removable wherein to have only the upper surface portion that contacts with incendiary material to be only, described abrasive element is fixed in the fire grate system by means of complicated fixture, described fixture comprises sliding recess and the bolt that stands fire grate screen mill damage and pollute, and this wearing and tearing and pollution are unfavorable for that fixture acts on expeditiously.
Known such stepped grate from EP1036986, wherein fire grate bar and grate block longeron (stringer) have the depression along adjacent sides, the size of depression becomes with Position Design several holes are provided on the longitudinal direction of fire grate bar, the average distance in hole is 30-70mm, and the aperture is greater than 70mm
2, preferably about 100mm
2These fire grate bars are arranged to some different width, and for example width is respectively 25mm and 30mm.As can be seen, one of them defective is in this structure, and some fire grate bars will be set on each grate block, and along the formation more complicated of several depressions of the side of described fire grate bar.
Summary of the invention
Target of the present invention provides a kind of stepped grate of type as mentioned above, by fire grate, can make fire grate bar fixing simply.According to the present invention, this target is to realize by the stepped grate of described type, and described stepped grate comprises the feature that the characteristic of claim 1 is set forth.Like this, can fire grate bar be installed in the grate block in more effective mode.In addition, the primary air opening is arranged to the single elongated opening and is had such advantage, because higher air velocity is upwards by opening, so the ashes that fall by described opening trend towards reducing.The preferred embodiments of the present invention disclose in the dependent claims, are conspicuous after the detailed description of the present invention of the character of preferred embodiment below reading.
Description of drawings
In the detailed part, according to the exemplary embodiment of fire grate bar of the present invention, the present invention is explained on details ground more with reference to as shown in drawings below this specification, wherein:
Fig. 1 is the sectional elevation figure of three successive steps shape fire grates of incinerating apparatus,
Fig. 2 is the perspective view of grate block,
Fig. 3 is the side view of fire grate bar,
Fig. 4 is the vertical view of fire grate bar among Fig. 3,
Fig. 5 be among Fig. 3 and Fig. 4 fire grate bar along line V-V cut open the cross-sectional view got and
Fig. 6 keeps supplying the fire grate bar that grate furnace is combed and partly used.
The specific embodiment
The stepped grate that is used for apparatus for incinerating waste material shown in Figure 1 is made of three parts, and each part comprises static grate beams (girders) and moves back and forth grate beams.Each beam comprises grate beam 2, and grate block 1 is fixed on the described grate beam 2.Be suitable for moving back and forth every a grate beams, and intermediate beam is motionless.As shown in Figure 2, each grate block is made of two casting longerons 3,4 that interconnect by two or four horizontal steel poles 5.Grate block 1 is filled with the foundry furnace grid section 6 that is shelved on the steel pole 5.Shown in Fig. 3-5, fire grate bar is provided with suitable being used for fire grate bar is supported on supporting member on the horizontal steel pole 5.
By making supporting member form depression suitably in the bottom side of fire grate bar, carry out the fixing of fire grate bar, like this, fire grate bar is inserted on the horizontal steel pole 5 along the direction that tilts.When inserting, the grate furnace grid section provides the locking to fire grate bar on next.According to by the straight line of horizontal steel pole 5 and the angle γ between the insertion depression, insert obliquely, as shown in Figure 3, described angle is preferably between 80 ° to 45 °.As shown in Figure 1, the primary air that is used to burn passes stepped grate and enters smelting furnace from below, flows through along the side of fire grate bar, and these sides are provided with the depression shown in Fig. 3-5.Depression in fire grate bar is positioned to form elongated open, and described elongated open typical case has the longitudinal size of 100mm, and has the width of typical 3-5mm.Shown in Fig. 3-5, the opening in the fire grate bar has the opening gradient α under the side direction along the longitudinal, and in a preferred embodiment, opening gradient α is approximately 14 °.Correspondingly, the opening in the fire grate bar has along narrow distolateral downward opening gradient β, and in a preferred embodiment, opening gradient β is approximately 14 °.
According to the present invention, the depression of the elongated open of providing is provided fire grate bar 6, grate block longeron 3,4 have depression, these depressions can be optimised together, so that provide the cooling of the suitable degree of fire grate bar and the suitable pressure drop of crossing fire grate bar is provided, in order to avoid ashes trend towards blocking opening.
Preferably, the width of fire grate bar is within the 45-70mm scope, and in preferred embodiment shown in the drawings, this width is 60mm, and other preferable width is 55mm, 55.5mm and 60.5mm.Compare with the typical sizes of existing fire grate bar,, can reduce the cost that uses fire grate bar to cover a certain zone of stepped grate by these fire grate bars than broad are provided with about 20-30mm size.The fire grate bar of broad can reduce the 15-20% of cast steel gross weight in the grate block, the corresponding minimizing of cost price thus.
In addition, can see that further advantage is the wearing and tearing that reduce on the fire grate bar 6.This is considered to produce following result, promptly, wearing and tearing on fire grate bar 6 sides can not be arranged in each grate block 1 with narrower, more fire grate bar 6 and compare, and same degree ground influences total side path sizes of combination stove grid section in the grate block 1, thereby causes longer service life.
Utilization is according to grate block longeron 3,4 of the present invention and fire grate bar 6, and the intrinsic pressure drop on fire grate both sides is between 75 to 300Pa when typical service condition.This higher pressure drop on fire grate both sides is equivalent to higher air velocity, and thus, the primary air opening stays open, and avoids ashes and waste material pollution.Be applicable to smelting furnace according to fire grate of the present invention to be connected, and fire grate be designed to by or do not incinerate waste material to the steam boiler heat supply by the steam turbine that is used to generate electricity.
As shown in Figure 6, last grate furnace grid section is provided with upright lip 8, and upright lip 8 provides and being tightly connected of the intake section of the rebound of next fire grate part or apparatus for incinerating waste material.
Fire grate bar begins to be installed on the fire grate part from the lower end, because the formation of engagement device, the fire grate bar of installing subsequently on each fire grate bar of formerly installing is locked in last fire grate bar on the appropriate location.
Last grate furnace grid section 6 on the grate beam 2 is inserted into by dump grate crossbeam 2, for example, uses ripping bar lifting grate beam 2 lower ends or passes through to use tackle pulley.The inclination of grate beam 2 is along inclined direction inserted rebound below and is gone up fire grate bar 1 sufficient space is provided, and when grate beam 2 was back to its installation site, last grate furnace grid section 1 was locked in the appropriate location by engaging between upright lip 8 and the rebound.
Claims (10)
1. stepped grate that is used for apparatus for incinerating waste material, described stepped grate is made of grate block (1), grate block (1) with adjacent rows and on the waste material direction of advance continuous mode place, described stepped grate is shelved on the parallel grate beams (2), wherein be suitable for moving back and forth every a grate furnace comb section (1), and middle grate furnace comb section (1) is motionless, and each grate block comprises:
By two (half blocks) or interconnective two longerons (3 of four horizontal steel poles (5), 4), each grate block (1) is filled with loosely, vertically suspended foundry furnace grid section (6), described foundry furnace grid section (6) is shelved on the described steel pole (5), described fire grate bar (6) comprises the depression along adjacent sides, described being recessed to form is used to the opening of allowing that burning enters with primary air, described primary air also provides necessity cooling to fire grate bar (6), be recessed to form a single elongated depression along adjacent sides described, it is positioned at the center of at least one side of each fire grate bar (6), it is characterized in that, by making supporting member suitably form depression on fire grate bar (6) bottom side, fire grate bar (6) is fixed on the steel pole (5), like this, fire grate bar can along inclined direction be inserted on the horizontal steel pole (5), and is locked in the appropriate location by next higher grate furnace grid section (6) subsequently.
2. stepped grate as claimed in claim 1 is characterized in that supporting member is formed with semicircle area supported.
3. stepped grate as claimed in claim 1 or 2 is characterized in that, the straight line by steel pole (5) and insert angle γ between the direction of depression between 80 to 45 °.
4. each described stepped grate in the claim as described above is characterized in that described elongated recess is arranged on the both sides of described fire grate bar (6).
5. each described stepped grate in the claim as described above is characterized in that, the aperture area that is used for primary air add up to fire grate bar (6) total upper surface area 3 to 7% between.
6. each described stepped grate in the claim as described above is characterized in that the width of described fire grate bar (6) is 45-70mm, is preferably 55-60mm.
7. each described stepped grate in the claim as described above is characterized in that described primary air opening has the longitudinal size of about 100mm, and has the width of about 3-5mm.
8. each described stepped grate in the claim as described above is characterized in that, is used to allow that opening that primary air enters has the opening gradient (α) under the side direction along the longitudinal, and described opening gradient (α) preferably is about 14 ° greater than 10 °.
9. each described stepped grate in the claim as described above is characterized in that be used to allow that the opening that primary air enters has along narrow distolateral downward opening gradient (β), described opening gradient (β) preferably is about 14 ° greater than 6 °.
10. each described stepped grate in the claim as described above is characterized in that the pressure drop of crossing the primary air opening is within the scope of 75-300Pa, preferably in the scope of 150-250Pa.
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 |
|---|---|
| CN101198823A true CN101198823A (en) | 2008-06-11 |
Family
ID=36644916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800211260A Pending CN101198823A (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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3099949B1 (en) | 2019-08-13 | 2021-11-19 | Saretco | Stepped grate block for incinerator furnace hearth, and corresponding support |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1566382A (en) * | 1977-03-09 | 1980-04-30 | Peters Ag Claudius | Grate plate |
| CH656692B (en) * | 1982-01-14 | 1986-07-15 | ||
| GB2120764B (en) * | 1982-05-13 | 1985-08-14 | Voelund Miljoeteknik | A stepped grate for an incinerator plant |
| EP1036986B1 (en) * | 1999-03-17 | 2004-09-15 | Babcock & Wilcox Voelund ApS | Stepped grate for a waste incineration plant |
| US6964237B2 (en) * | 2003-06-30 | 2005-11-15 | Mark P. Hepp | Grate block for a refuse incineration grate |
-
2006
- 2006-05-12 TW TW095116849A patent/TW200706808A/en unknown
- 2006-05-15 CN CNA2006800211260A patent/CN101198823A/en active Pending
- 2006-05-15 WO PCT/DK2006/000257 patent/WO2006119777A1/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
- 2006-05-15 KR KR1020077029018A patent/KR20080093855A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP1886066A1 (en) | 2008-02-13 |
| KR20080093855A (en) | 2008-10-22 |
| TW200706808A (en) | 2007-02-16 |
| WO2006119777A1 (en) | 2006-11-16 |
| JP2008540991A (en) | 2008-11-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080611 |