Classifications

• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23H—GRATES; CLEANING OR RAKING GRATES
  • F23H2900/00—Special features of combustion grates
  • F23H2900/03021—Liquid cooled grates

Definitions

• the invention relates to one of several fluid-cooled
• Pressure-tight coupling element for coupling the cooling systems of grate elements according to the preamble of claim 14.
• a combustion grate has at least one grate row with a plurality of fluid-cooled grate elements, which
• Cooling fluid is passed through a conduit or channel of the grate element.
• the channels of the grate elements are usually coupled together in series.
• Grate elements are also referred to as grate bars or grate plates.
• a grate may comprise a plurality of grate rows, which are usually brick-like, at least in places are arranged one above the other. The thermal expansion of a grate row is absorbed by arranged at the ends of the rows of rust expansion boxes. In the bars are openings for the supply of combustion air. The juxtaposed
• Grate elements are combined into rows and every other such grate element row is in terms of the feed of the combustion material - ie the periodic execution of Schürh Weg Weg GmbH Weg Weg GmbH Weg GmbH Weg GmbH Weg GmbH Weg GmbH Weg GmbH Weg GmbH Weg GmbH GmbH - movably mounted and connected to an oscillating drive. Since these grate elements for the most part in
• Composition of the combustion material e.g. in
• Combustion heat released are the rust elements constantly both of the chemical corrosion, as well as the
• Rust rows from the fluid inlet from grate element to grate element reaches the fluid outlet.
• EP 1760400 and EP 0663565 show a grate element made of cast steel, which is part of a
• the grate element through which the cooling water flows has two or more cast steel cooling channels running virtually parallel.
• the inputs and Outlet openings are preferably arranged directly at the foot-side end of the cooling channel, emerging from the bottom of the grate element.
• the cooling channels of the grate elements are connected to each other by means of screwed to the grate elements fittings and pipe sections, for example. So-called manifold.
• Each grate row has a main inlet pipe and a
• Main drain line for supply and removal of the cooling fluid.
• the document EP 1219898 AI shows a grate block, which is part of a grate within a system for
• the flow through the cooling water pipe is here between the created as a cast grate block and a separate holding part
• Pipe systems which are arranged in the region of the grate element carrier to the rear.
• the supply takes place from a common distribution system and the connection takes place via pipelines with screw connections or weldings.
• Document EP 1315936 A1 describes a grate element cooled with liquid with cast-in cooling coils. The liquid coolant is added to each grate element from below
• Pipe cross-sections can be realized in the connection points, which leads to high pressure losses and low amounts of cooling water. Pressure losses are also due to the required fittings and pipe manifold unfavorably increased.
• Fluid channels are proposed, extending through a
• the coupling of the fluid channels of grate elements is also referred to below as a fluid connection.
• Cooling water flow area allows higher flow rates with less pressure loss. This leads to a better cooling of the grate elements.
• Another advantage of the invention is that with a corresponding design of the cooling connections the
• Fluid connection for water-cooled cast iron grate elements with cast cooling channels and grate elements with inserted or cast-in cooling elements can be used.
• Another advantage of the invention is that the chosen embodiment of the fluid connection eliminates all welds in hard to reach places with difficult weld preparation and the risk of stress and crack formation.
• An advantage of the invention is also that the execution of the grate elements for receiving the fluid connection takes place in connection with the production of the cast grate elements or with mechanical finishing.
• Another advantage of the invention is that the material quality of the seals installed in the power bypass also meet the emergency running properties in case of failure of the grate cooling.
• An advantage of the invention is that the fluid connection is made of stainless material and therefore insensitive to chemical corrosion and mechanical wear.
• the inventive coupling element ensures a detachable, pressure-tight and self-centering fluid connection between adjacent grate elements at large
• Cooling water flow and low pressure loss The invention will be explained in more detail below with reference to the embodiment shown m the figures.
• Fig. 1 shows a perspective view of an imple mentation form of a grate element with laterally disposed channel mouth region of a fluid channel;
• Fig. 2 shows a sectional detail view of a
• Fig. 3 shows a broken view of a
• Cooling duct guide is visible
• Fig. 4 shows two juxtaposed grate elements in a view from below and fluidly with each other
• Fig. 5 shows two juxtaposed grate elements in a view from above and fluid moderately with each other
• the grate element 2 shown in perspective in Fig. 1 has on both sides of the long for receiving the
• a coupling element 1 is shown, which m the
• the position of receiving the fluid connection is directed to the full length of the grate element side.
• the position of the screw connections are taken into account.
• the openings are taken into account.
• coupling element 1 is sealed by a seal 8 against the grate elements 2.
• the coupling element 1 has a centering part 12, and subsequent in both axial directions
• FIG. 2 shows a cooling water flow area 5 and a wall thickness 6, which are not limited in dimension and embodiment.
• the embodiment shown is also not on the Design and shape of the guide, centering and sealing parts limited.
• the coupling element 1 couples the respective fluid or cooling channel laterally adjacent grate elements.
• the length of the coupling element 1 is formed so that its free ends at least partially penetrate the side wall of a grate element 2.
• the coupling element 1 preferably has one
• Coupling element 1 can be carried out in but also in polygonal shape. The choice of 6 wall thickness
• Coupling element 1 depends on the respective
• the guide parts 11 have a relation to the
• the guide parts 11 are conically shaped with a conicity which corresponds to a formed in the respective mouth region 3 of the grate elements inner cone.
• the centering part 12 of the coupling element 1 is used to stabilize and center the grate elements 2 to each other.
• the centering part is also in both directions
• Coupling element 1 serves as a base for receiving a temperature-resistant annular or polygonal
• the space or space for receiving the seal 8 is preferably integrally formed on the grate element 2 in the mouth region as a seat or recess, so that a ring-shaped or polygonal sealing chamber is present.
• the coupling element 1 is pressed in the assembled state against the deformable seal 8, which in the
• the seal 8 seals the
• the volume of the seal 8 is chosen larger by a certain factor than the available
• FIG. 3 illustrates a broken view of a grate row 10 of the grate 100 in a sectional view from below, in which the connection of the coupled fluid channels two grate elements 2 of the grate row 10 and the
• Cooling duct guide is visible.
• the cooled grate element 2 shown in FIG. 3 is thus to be turned by 180 °.
• Figure 5 shows cooled grate elements connected together, top view.
• Figure 4 illustrates the cooled grate elements 2 from below in the assembled state, wherein the rigid
• Screw connections are the grate elements on block
• Screw is the coupling element 1 in the
• a so-called diarrhea gap is formed, which is preferably kept small by the mechanical reworking, so that solid or burning particles and ash do not fall through the gap.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Incineration Of Waste (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Priority Applications (4)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

Country Status (4)

Citations (11)

Family Cites Families (3)

• 2011
  • 2011-09-01 SI SI201131524T patent/SI2751488T1/en unknown
  • 2011-09-01 EP EP11752202.9A patent/EP2751488B1/de active Active
  • 2011-09-01 ES ES11752202.9T patent/ES2677016T3/es active Active
  • 2011-09-01 WO PCT/EP2011/065081 patent/WO2013029680A1/de active Application Filing

Patent Citations (11)

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