Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
  • F23M5/00—Casings; Linings; Walls
  • F23M5/08—Cooling thereof; Tube walls
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F22—STEAM GENERATION
  • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
  • F22B37/00—Component parts or details of steam boilers
  • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
  • F22B37/10—Water tubes; Accessories therefor
  • F22B37/107—Protection of water tubes
  • F22B37/108—Protection of water tube walls
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
  • F23M5/00—Casings; Linings; Walls
  • F23M5/04—Supports for linings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F27—FURNACES; KILNS; OVENS; RETORTS
  • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
  • F27D1/00—Casings; Linings; Walls; Roofs
  • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements

Definitions

• the invention relates to a plate for a protection system for a boiler tube wall with a rear, a front and the sides connecting the back and front, and a protection system for a boiler tube wall with a holding element fastened to the boiler tube wall with a through hole, a plate and an anchoring element penetrating through the through hole ,
• Such plates and protection systems are used in incineration plants to protect boiler tube walls from flue gas.
• Such a plate and such a system are described for example in DE 40 07 662 Cl.
• the system described has holding elements welded to the boiler tube wall in a horizontal row on which the plates are supported. Due to the thickness of the holding element, there is always a horizontal gap between two plates arranged vertically one above the other.
• Each plate is held on the holding element by an anchoring element.
• the anchoring element engages in a recess on one side of the plate.
• the anchoring element is already in a through hole in the holding element, the plate being inserted in such a way that the anchoring element engages in the recess.
• it is attached using mortar attached to the wall.
• the gaps between the plates and the recesses in the plates are also filled with mortar.
• the invention is based on the technical problem of simplifying the known protection system and making it more stable.
• a plate for a protection system for a boiler tube wall with a rear, a front and sides connecting the rear and front, wherein - A recess for receiving a holding element is provided on the back and
• a hole leads from one side to the recess.
• the plate of the invention has a recess on its rear side for receiving a holding element. Installed in a protection system, the plate is therefore not supported with its lower side on the holding element but is suspended with the recess on the holding element. The holding element is completely protected from the flue gas by the plate. Furthermore, if there are several panels installed next to or on top of each other, no gaps remain through the holding elements. The panels can be placed directly next to each other without a gap, so that either no or very little mortar or joint filling material is used to fill the gap between the panels. This increases the stability of the protection system.
• the plate according to the invention has a bore which leads from one side to the recess.
• this hole serves to introduce an anchoring element which anchors the plate to the holding element. Since the anchoring element is inserted from one side, a full-surface front surface remains which is in contact with the flue gas. Even if the hole is built in Is filled with mortar, this mortar is not in direct contact with the flue gas.
• the plates can be installed directly on top of each other so that there is no gap through which flue gas can flow from the front along the sides.
• a plate is understood to mean any body which is used in protective systems of boiler tube walls to protect the boiler tube walls, namely any body which is attached to the side of the boiler tube wall facing the flue gas to protect it from flue gas.
• These are in particular stones made of refractory materials.
• the plate can have any shape. It is essential that it has a defined rear side, which faces the boiler tube wall in the installed state and into which a recess can be made, in which the holding element is protected from smoke gas contact by the plate in the installed state.
• the front and sides can be designed in any way and merge seamlessly. The front and sides of the plate differ from the rear in that they do not face the boiler tube wall when installed. Their shape is determined by the location of the plate. It is essential that a side is provided which, when installed, is not in direct contact with the flue gas into which the bore is made.
• the plate is a flat body with a flat front, flat sides perpendicular to the front and a back. The surface of the front is in the Usually larger than the area of a page.
• the front side particularly preferably has a rectangular shape. However, other shapes are also conceivable (e.g. hexagonal, triangular or octagonal shapes.
• a recess is understood to mean any contour of the back of the plate which allows the plate to be hung on a holding element projecting from a boiler tube wall. Hooking in means placing the plate with its recess on a holding element. Depending on the installation position of the plate, this can protrude from a vertical or at an angle to the vertical tube wall.
• the recess in the planes parallel to the front surface preferably has a rectangular cross section, with the surfaces adjacent to the rear, delimiting the recess, running perpendicular to the front.
• a hole is understood to mean any breakthrough of the plate from one side to the recess. This can be a passage created by actually drilling into the stone. However, it can also be, for example, a passage already produced during the production of the basic shape of the plate. It is essential that the bore allows an anchoring element to be pushed through from the side to the recess.
• a particularly good stability of a protective wall composed of these plates for a boiler tube wall is achieved if one side is at an angle of less than 90 ° or more than 270 ° to Front is aligned, especially at an angle of 45 ° or 315 °.
• the beveled side is placed on another, opposite beveled side, so that these beveled sides lie flat on each other.
• the plates support one another and counteract rotation of the plate.
• the installation of the plates is simplified by the bevel.
• the plates can also be arranged partially overlapping via a step-shaped joint.
• the sides can be formed as surfaces that run essentially perpendicular to the front.
• the stability advantages and ease of installation and removal of the plate, as are achieved with plates with bevelled sides, can be achieved with plates with sides running perpendicular to the front side if these sides have a step running essentially parallel to the front side. Similar to how the angled sides interlock to stabilize and position the panel, panels with stepped sides interlock.
• the heat transfer between the flue gas and the liquid in the tubes of the boiler tube wall is improved the closer the plate is to the boiler tube wall and the narrower the gap between the plate and the boiler tube wall. It is therefore advantageous if the back of the plate is shaped like a Boiler tube wall is adapted, in particular semi-cylindrical areas for the tubes and surfaces for the tube fins connecting the tubes.
• the plate can have a blind bore that continues from the recess.
• a protection system for a boiler tube wall with a holding element fastened to the boiler tube wall with a through hole, a plate and an anchoring element penetrating through the through hole is designed in such a way that the plate has a recess on the rear side facing the boiler tube wall that has a recess that holds the holding element the plate has a bore which leads from one side of the plate to the recess and that one end of the anchoring element projects into the bore.
• Holding elements in the sense of the invention are any elements which can be attached to a boiler tube wall and which can carry a plate pushed with their recess on it if this plate is anchored by an anchoring element in a through bore of this element.
• the holding elements are flat, prism-shaped, elongated steels which are welded onto the boiler tube wall (webs). Above all, the steels can have rectangular surfaces, but they can also have trapezoidal surfaces on two opposing surfaces or several opposing surfaces.
• the holding element is preferably attached to tube fins, which between the tubes of the Boiler tube wall are arranged.
• the longitudinal axis of the holding element is arranged perpendicular to the surface of the boiler tube wall, in particular the tube fin.
• the advantages of the invention are achieved in protective systems which have only one plate. As a rule, however, a boiler tube wall is protected by a wall of plates arranged one above the other and next to one another.
• the advantages according to the invention are achieved here in particular when all the plates of the protection system are fastened to the boiler tube wall according to the principle according to the invention.
• the plates can be placed directly on and next to one another without a substantial gap. But they can also be set with a gap.
• the possibly existing gap between the plates, the gap between a plate and the boiler tube wall, the bore and the recess can be filled with mortar to improve the heat transfer and the protection against flue gas.
• the panels When assembled, the panels can also be back-poured with concrete or mortar. However, mortar-free installation is also possible.
• the cross section of the recess in each plane perpendicular to the longitudinal axis of the holding element is many times larger than the cross section of the holding element in the same plane.
• the area of a rectangle surrounded by boundary surfaces of the recess adjoining the rear is many times larger than the cross section of the holding element lying in the same plane.
• the plate can then, when pushed onto the holding element, be pushed into the desired position perpendicular to the longitudinal axis of the holding element in the longitudinal direction of the recess.
• the area of the recess defined in this way is preferably more than one and a half times, in particular more than three times larger than the cross section of the holding element.
• the hold of the plate on the holding element is improved if a blind hole continues from the recess and a further end of the anchoring element projects into the blind hole.
• the anchoring element can be pushed through the hole in the plate and the through-hole of the holding element into the blind hole. This ensures stable anchoring because the anchoring element is inserted into the plate at both ends.
• a cylindrical or conical pin is used. This ensures a particularly good fit of the pin in the blind hole.
• the anchoring element can be made of metal or ceramic, for example. The stability of the anchoring is particularly great if the anchoring element is wedge-shaped.
• Fig. 1 shows a protection system for a boiler tube wall with a plate in a perspective, partially sectioned view
• Fig. 2 shows the protection system of Fig. 1 in an exploded view.
• a plate 1 is connected to a holding element 3 via an anchoring element 2.
• the holding element 3 is welded onto the tube fin 4 of a boiler tube wall 5.
• the holding element 3 is seated in a recess 6 of the plate 1.
• the anchoring element 2 is inserted in a through hole 7 arranged in the region of the recess 6 in the holding element 3.
• One end 2a of the anchoring element 2 projects into a hole 8 which extends from the recess 6 to one Page 9 of plate 1 leads.
• the other end 2b of the pin-shaped anchoring element 2 protrudes into a blind hole 10 which continues from the recess 6.
• the plate 1 has a front side 11, a rear side 12 and, in addition to the side 9, further sides 9a, 9b connecting the front side 11 and rear side 12 (the side 9c can be seen in FIG. 2).
• the backside 12 is adapted to the shape of the boiler tube wall 5. It has semi-cylindrical regions 14 for the tubes 13 and a surface 15 which is adapted to the shape of the tube fin 4.
• the sides 9, 9a, 9b, 9c consist of surfaces 16, 17 running perpendicular to the front 11 and a step 18 which is essentially parallel to the front 11. The transitions between the surfaces 16, 17 and the step 18 are rounded.
• the step 18 is oriented on two sides 9b, 9c of the plate 1 from the front 11 towards the center of the plate and on the sides 9,9a opposite these sides 9b, 9c from the center of the plate.
• the holding element 3 is designed as a flat, elongated web, the longitudinal axis of which is oriented perpendicular to the tube fin 4 and thus the boiler tube wall 5.
• the holding element 3 is rounded at its outer end.
• the surface of the recess 6 has the shape of a rectangle in a plane parallel to the front side 11, bounded by boundary surfaces adjacent to the rear side 12.
• the base of the recess 6 is semi-cylindrical.
• the width B of the recess 6 is insignificantly larger than the width B of the holding element 3 in order to enable the holding element 3 to be inserted easily into the recess 6.
• the length L of the recess is many times greater than the thickness d of the holding element 3.
• the plate 1 To assemble the plate 1, it is hung on the holding element 3 in such a way that the holding element 3 is inserted into the recess 6.
• the plate 1 sits with its lower side 9b on the upper side of the next lower plate, not shown, and with its right side 9c on the left side of the next right plate, also not shown.
• the steps in the sides of the panels ensure that the panels fit snugly.
• the holding element 3 can, however, be attached somewhat above or below the desired position on the tubular fin 4. Because, in addition to the desired position, the holding element 3 can also be inserted well into the recess 6 due to the much longer length L of the recess 6 in relation to the thickness d of the holding element 3.
• the plate 1 can also be suspended on the holding element 3 during assembly in the vertical installation position. Then the upper, in the longitudinal direction L, delimiting surface of the recess 6 rests on the upper surface of the holding element 3 (cf. FIG. 1). The gap possibly remaining between the plate 1 thus suspended on the holding element 3 and the next lower plate is filled with mortar.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Thermal Sciences (AREA)
• Physics & Mathematics (AREA)
• Furnace Housings, Linings, Walls, And Ceilings (AREA)
• Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
• Supports For Pipes And Cables (AREA)
• Finishing Walls (AREA)
• Fluidized-Bed Combustion And Resonant Combustion (AREA)
• Rigid Pipes And Flexible Pipes (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=27588267

Family Applications (1)

Country Status (5)

Families Citing this family (6)

Family Cites Families (5)

• 2002
  • 2002-02-02 DE DE10204240A patent/DE10204240B4/de not_active Expired - Fee Related
• 2003
  • 2003-01-29 AT AT03704487T patent/ATE374907T1/de not_active IP Right Cessation
  • 2003-01-29 AU AU2003206794A patent/AU2003206794A1/en not_active Abandoned
  • 2003-01-29 WO PCT/EP2003/000871 patent/WO2003067154A1/fr not_active Ceased
  • 2003-01-29 EP EP03704487A patent/EP1470367B1/fr not_active Expired - Lifetime
  • 2003-01-29 DE DE50308319T patent/DE50308319D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events