EP2314916A2 - Ensemble de grille de combustion - Google Patents

Ensemble de grille de combustion Download PDF

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Publication number
EP2314916A2
EP2314916A2 EP10187551A EP10187551A EP2314916A2 EP 2314916 A2 EP2314916 A2 EP 2314916A2 EP 10187551 A EP10187551 A EP 10187551A EP 10187551 A EP10187551 A EP 10187551A EP 2314916 A2 EP2314916 A2 EP 2314916A2
Authority
EP
European Patent Office
Prior art keywords
nozzle tubes
receiving
grate
nozzle
parts
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.)
Granted
Application number
EP10187551A
Other languages
German (de)
English (en)
Other versions
EP2314916A3 (fr
EP2314916B1 (fr
Inventor
Heribert Posch
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2314916A2 publication Critical patent/EP2314916A2/fr
Publication of EP2314916A3 publication Critical patent/EP2314916A3/fr
Application granted granted Critical
Publication of EP2314916B1 publication Critical patent/EP2314916B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B50/00—Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone
    • F23B50/02—Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone the fuel forming a column, stack or thick layer with the combustion zone at its bottom
    • F23B50/06—Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone the fuel forming a column, stack or thick layer with the combustion zone at its bottom the flue gases being removed downwards through one or more openings in the fuel-supporting surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B7/00—Combustion techniques; Other solid-fuel combustion apparatus
    • F23B7/002—Combustion techniques; Other solid-fuel combustion apparatus characterised by gas flow arrangements
    • F23B7/005—Combustion techniques; Other solid-fuel combustion apparatus characterised by gas flow arrangements with downdraught through fuel bed and grate
    • 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 combustion grate through which the combustion of the fuel usually takes place from top to bottom, is one of the most stressed components and is to be regarded as a wearing part.
  • the combustion grate is formed from adjacent, hollow nozzle tubes, which have in their flanks in the longitudinal extension side by side many outlet openings for combustion air, which the fuel gases when flowing through the combustion grate, which is usually from top to bottom, is fed to achieve the most complete combustion and a low pollutant and particulate matter content.
  • the air is supplied via the trained as a nozzle tubes rods of the combustion grate, so that the air is very evenly distributed in the afterburner and delivered directly at the transition from the main combustion chamber to Nachbrennraum and thereby achieves optimum combustion.
  • this receiving part consists of a lower part and a shell, between the z. B. half shells, the air supply channels are formed, the air supply channels are accessible at any time by the decrease in the intake tops. Also, the nozzle tubes can be easily removed in this way.
  • the combustion grate also transversely to the direction of the nozzle tubes and there to provide a support surface for the solid to be burned, there is a spacer used between the receiving parts, which fill the distance between the opposite receiving parts, if not the last nozzle tube immediately at the end a spacer is arranged.
  • at least the receiving upper parts are fixed positively in the running direction of the nozzle tubes by the spacer parts.
  • the air supply channels go through the entire area of the nozzle tubes and in particular over the entire length of the receiving parts. If the air supply channels have two open ends, one of the open ends of the air supply channels is closed by a closure piece, since the air supply is usually only from the one end side.
  • the receiving parts, the spacer parts and the closure pieces are usually made of a high-temperature fired material, such as silicon carbide, while the nozzle tubes are made of steel, and preferably folded and welded from a sheet metal Tubes with a polygonal cross section are to prevent twisting in the correspondingly shaped recesses of the receiving parts.
  • a high-temperature fired material such as silicon carbide
  • the nozzle tubes are made of steel, and preferably folded and welded from a sheet metal Tubes with a polygonal cross section are to prevent twisting in the correspondingly shaped recesses of the receiving parts.
  • an additional anti-rotation is necessary, for example, a radially projecting from the nozzle tube projection which projects into a corresponding recess of the surrounding receiving female part.
  • the nozzle tubes are therefore made of steel, as they must be able to withstand bending, even under high heat, as they sag freely in the middle and are only supported at the ends.
  • the many, relatively small air outlet openings must be introduced in the steel tubes, which is not possible with burned and sintered particular material such as the other parts with this precision.
  • the air outlet openings in the nozzle tubes should be located very precisely just below the point of the largest cross section of the nozzle tubes, so the smallest distance between the nozzle tubes, which would also be difficult to achieve in the fired material.
  • these are positively connected to one another in the longitudinal direction of the nozzle tubes, for example by a longitudinal stop for the nozzle tubes formed in the receiving part, in particular the receiving upper part, or an outwardly protruding projection of the nozzle tubes which fits into a corresponding positioning recess of the receiving part.
  • the nozzle pipes are sealed to the receiving parts by wrapping with a heat-resistant sealing tape in the area where the nozzle pipes are enclosed by the receiving parts.
  • the stacked upper and lower parts of the receiving parts are sealed against each other, which instead or additionally may be formed as a labyrinth seal on the contact surfaces, as well as the inserted into the receiving parts closure pieces.
  • the receiving upper part contains a positive fixation with respect to the receiving base in all transverse directions, e.g. by correspondingly shaped projections, which can also be part of the labyrinth seal at the same time.
  • the spacer will also have a positive connection with the components underneath, so that it can not be moved unintentionally in the direction transverse to its longitudinal extent relative to the receiving parts.
  • the spacer locked by simply inserting between the receiving parts form-fitting manner with respect to these, and thereby also fixed the receiving shell positively between the spacer and the surrounding housing.
  • such a combustion grate will only have a grate area formed by nozzle tubes, but in special constructions several such grate areas formed by nozzle tubes may be arranged side by side, which are then interrupted by receiving parts running therebetween.
  • the components described can be used as a modular system for producing burner grids of different sizes, the modular system comprising in the simplest case only one type of nozzle tube, and at least one type of spacer element.
  • the kit contains receiving parts that have not only on one, but also on both opposite sides openings for nozzle tubes, so both the kit has both one-sided and two-sided receiving parts.
  • FIG. 1a shows the grate 1 in the assembled state in perspective view
  • FIG. 1b a vertical section transverse to the direction 10 of the nozzle tubes 2
  • Figure 1c a vertical section in the direction 10 of the nozzle tubes 2 shows.
  • FIG. 1a shows that viewed in the plan view in the center of a grate area 3 is formed, which consists of spaced apart side by side, hollow nozzle tubes 2, so that in the space between the nozzle tubes 2 through - as best in FIG. 1b to recognize - the combustion gases of the combustion of resting on the grate area 3, not shown, burning material can be removed down.
  • FIG. 5b shows are for this purpose along the course direction 10 of each nozzle tube 2 a plurality of periodically spaced air outlet openings 13 present, which penetrate the wall of the nozzle tube 2, in accordance with FIG. 5b just below the point of the greatest width of the cross-section 14 of the nozzle tube 2, which in this case is a pentagonal, center-symmetrical cross-section, which is directed with the tip upwards.
  • the nozzle tubes 2 have a polygonal cross section so that they can not be unintentionally rotated in the likewise polygonal, precisely fitting recesses 22, whereby the position of the air outlet openings 13 would change.
  • FIG. 1b is formed by two oppositely directed, convex bulbous, in this case angled side walls of two adjacent nozzle tubes 2, a passage from top to bottom, which - viewed from top to bottom - initially greatly narrowed and then expands again, so a nozzle shape forms.
  • the nozzle tubes 2 are folded from a sheet metal and at one point, here the center of the flat bottom, welded together, in particular Laserversch dipt.
  • the air outlet openings 13 can be introduced very inexpensively and quickly before edging and welding in the still flat sheet in this way, be it by punching, drilling or cutting by laser or water jet, which is much faster and cheaper possible than the introduction z. B. in the rounding of a drawn tube, quite apart from the fact that the deformation of a drawn tube to a polygon is also not without problems.
  • This central grate area 3 is surrounded by a non-permeable support area 13, on which the firing material can also rest, but preferably forms a firing point only above the grate area 3, since only there are the combustion gases discharged downwards.
  • the recess 22, ie in the upper part and lower part each about half of the recess 22, formed, which corresponds to the outer periphery of the nozzle tube 2, so that this with its end 2a, b in each case one of the recesses 22 rests.
  • a circumferentially enclosed air supply channel 5a, b is formed, in which the lower part 6a is designed trough-shaped and the upper part 6b closes this tub as an applied cover.
  • the lower part 6a protrudes upward on the outer end facing away from the nozzle tubes 2 next to the upper part 6b and together with the latter forms the support region 13.
  • the ends 2a, b of the nozzle tubes 2 do not or only slightly into the free space of the air supply channels 5a, b in order to hinder the air flow as little as possible, from which the nozzle tubes 2 relate their secondary air.
  • a stop 24 for the upper tip 15 of the front end of the nozzle tube 2 is formed in the receiving upper parts 6b in order to positively prevent a longitudinal displacement of the nozzle tube 2.
  • the upper side of the receiving parts 6, in the illustrated case only the receiving upper part 6b, is sloping inclined towards the center, ie the nozzle tubes 2 and the grate area 3, in order to allow the firing area lying on this supporting area 13 to slip better in the direction of the grate area 3 during the burnup ,
  • the grate area 3 is surrounded on all sides by a dense support area 13.
  • the nozzle tubes 2 are not arranged side by side up to the ends of the receiving parts 6, but in the region of the front ends of the receiving parts 6 there are no more nozzle tubes 2 between them, but there is the distance 9 between the receiving parts 6 by a suitable , solid spacer 8 closed.
  • the receiving part is wedge-shaped with a decreasing from top to bottom cross section, so that it can be used in a simple manner from above between the receiving parts.
  • the spacer 8 protrudes beyond the joint between receiving lower part 6a and receiving upper part 6b, and thereby locks the receiving upper part 6b in a form-fitting manner in at least one horizontal direction.
  • a groove-shaped positioning recess 17 can be seen in the underside of the spacer 8, which extends in the direction 10 of the nozzle tubes 2 and into which a component of the surrounding combustion device engages to prevent displacement of the spacer 8 on the nozzle tubes 2 to or away from them ,
  • the nozzle tubes 2 may have, for example, from the bottom downwardly projecting projection 16 in a corresponding recess 20 of the z. B. receiving lower part 6a engages and a displacement of the nozzle tubes 2 in their direction of travel relative to the Prevents receiving parts or even with round pipes would provide a backup against unwanted rotation.
  • FIG. 2 shows separately the receiving base 6a in a perspective view, with the in its longitudinal direction, the transverse direction 11 of the grate 1, continuous and both sides end-like open trough-shaped channel which forms the air supply channel 5a in the nozzle tubes 2.
  • the upper part 6b is not displaceable relative to the lower part 6a in the transverse direction 11 due to the positive connection, which then cause the inserted nozzle tubes 2 between these two components.
  • a positive connection between upper part 6b and lower part 6a in the direction 10 of the nozzle tubes 2 can be provided by the contact surface between the upper part 6b and lower part 6a is formed as a labyrinth seal with zigzag cross-section, ie consist of tongue and groove, which is not shown in the drawings ,
  • a displacement of the receiving lower part 6a in its longitudinal direction, the transverse direction 11 of the burner grate 1, with respect to the surrounding components is positively prevented by each transverse to its longitudinal direction, ie in the direction 10 of the nozzle tubes 2, shoulder 23 in the bottom of the receiving part 6a, with it is held positively in a surrounding component.
  • the components of the support area 13, so receiving base 6a, receiving shell 6b, spacer 8 and optionally the closure pieces are massive, at least very thick-walled, components, which consist of a fired at high temperature material, in particular silicon carbide.
  • nozzle tubes 2 are made of steel, are also exposed to a higher temperature load due to the immediately above ember bed, and therefore form a wearing part in the grate 1, which one on simple Must be able to change way.
  • FIG. 1a shows, this is possible in a few steps, for this purpose only the spacers 8 and receiving tops 6b must be lifted upwards, whereupon you can also remove the nozzle tubes 2 upwards and replace them with new ones.
  • the ends of the nozzle tubes 2 may be wrapped on the outside, in the region in which they are received between the receiving upper part 6b and receiving base 6a, so that these two parts lie close to the nozzle tube 2.
  • closure pieces 12 arranged in the ends of an air supply channel 5a, b can be wound around and sealed by sealing tape 18 and likewise a fitting piece 19 in a recess 22, not required for a nozzle pipe 2, of a receiving part 6.
  • Fig. 6 shows - in the same direction as Fig. 1c This is made possible by the fact that the outer receiving parts 6 are designed as described above, whereas the middle receiving part is formed on both sides for receiving the ends 2b of the nozzle tubes 2 projecting there.
  • mittsymmetrisch formed receiving parts 6 - can be prepared with a plurality of spaced grate sections 3 spaced apart grate sections 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Incineration Of Waste (AREA)
  • Solid-Fuel Combustion (AREA)
EP10187551.6A 2009-10-23 2010-10-14 Ensemble de grille de combustion Not-in-force EP2314916B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009050517A DE102009050517B4 (de) 2009-10-23 2009-10-23 Brennrost-Bausatz

Publications (3)

Publication Number Publication Date
EP2314916A2 true EP2314916A2 (fr) 2011-04-27
EP2314916A3 EP2314916A3 (fr) 2013-09-04
EP2314916B1 EP2314916B1 (fr) 2017-08-30

Family

ID=43532759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10187551.6A Not-in-force EP2314916B1 (fr) 2009-10-23 2010-10-14 Ensemble de grille de combustion

Country Status (2)

Country Link
EP (1) EP2314916B1 (fr)
DE (1) DE102009050517B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2458276A3 (fr) * 2010-11-30 2014-08-06 Robert Bosch GmbH Chaudière

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2592944A1 (fr) * 1986-01-13 1987-07-17 Etude Applic Gle Elements Meca Chaudiere a combustible solide et plus particulierement chaudiere a bois
DE4435749C2 (de) * 1994-10-06 1998-05-28 Heribert Posch Heizvorrichtung für feste Brennstoffe
DE10148686C1 (de) * 2001-10-02 2003-07-10 Heribert Posch Brennvorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2458276A3 (fr) * 2010-11-30 2014-08-06 Robert Bosch GmbH Chaudière

Also Published As

Publication number Publication date
EP2314916A3 (fr) 2013-09-04
DE102009050517A1 (de) 2011-05-05
EP2314916B1 (fr) 2017-08-30
DE102009050517B4 (de) 2012-05-31

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