EP3887738A1 - Ofen mit einem schutzsegment am ofenauslauf - Google Patents
Ofen mit einem schutzsegment am ofenauslaufInfo
- Publication number
- EP3887738A1 EP3887738A1 EP19809445.0A EP19809445A EP3887738A1 EP 3887738 A1 EP3887738 A1 EP 3887738A1 EP 19809445 A EP19809445 A EP 19809445A EP 3887738 A1 EP3887738 A1 EP 3887738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- profile
- furnace
- oven
- cooling surface
- 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
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 53
- 238000001816 cooling Methods 0.000 claims abstract description 184
- 239000004568 cement Substances 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims description 2
- 238000010304 firing Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 55
- 239000004575 stone Substances 0.000 description 12
- 230000003068 static effect Effects 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 235000012054 meals Nutrition 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
- F27B7/22—Rotary drums; Supports therefor
- F27B7/224—Discharge ends
-
- 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
- F27D9/00—Cooling of furnaces or of charges therein
-
- 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
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/0002—Cooling of furnaces
- F27D2009/0005—Cooling of furnaces the cooling medium being a gas
- F27D2009/0008—Ways to inject gases against surfaces
Definitions
- the invention relates to a kiln for burning cement clinker with at least one protective segment at the discharge end of the kiln.
- protective segments are usually used to seal the kiln wall and to hold the inner lining of the kiln.
- Such protective segments are provided at the end area of the kiln where the fired clinker leaves the kiln. Extremely high temperatures of around 1200 ° C to 1450 ° C prevail in this area, which is why cooling of the protective segments is necessary.
- Known air cooling systems are, however, not sufficient for protective segments made of cast steel, for example, so that thermally induced abrasive wear occurs after about a year and leads to high maintenance costs and long downtimes of the furnace.
- a kiln for firing cement clinker comprises a tubular rotary tube which is rotatable about its central axis, the rotary tube having a discharge end at which the cement clinker leaves the furnace, a protective segment attached to the discharge end, which has an outwardly facing wear surface and having an inwardly facing cooling surface, the furnace having cooling means for generating a flow of cooling air along the The cooling surface of the protective segment flows.
- the cooling surface has profile bodies which are designed in the form of a pin, so that they preferably cause turbulence in the cooling air flow.
- a burner for burning the clinker is preferably installed in the furnace, which burner is at least partially installed within the rotary tube.
- the burner is preferably mounted in the vicinity of the discharge end of the rotary tube, so that the material to be burned is moved towards the burner within the rotary tube and is slowly heated.
- the clinker therefore has a very high temperature of around 1200 - 1400 ° C.
- the furnace preferably has a plurality of protective segments which are arranged next to one another in a ring and preferably form the end face of the discharge end of the rotary tube.
- the cooling air flow is used to cool the protective segments.
- the cooling device preferably generates a cooling air flow which flows radially and / or in the circumferential direction of the rotary tube, in particular the discharge end of the rotary tube.
- the cooling air flow preferably flows along the cooling surface of the protective segment, in particular parallel to the cooling surface.
- the wear surface of the protective segment points outwards, in particular in the axial direction outwards with respect to the rotary tube, and is preferably arranged in such a way that the clinker flows along the wear surface of the protective segment when it leaves the furnace.
- the cooling surface faces inwards, in particular in the axial direction of the rotary tube, and does not come into direct contact with the clinker.
- the cooling surface preferably points in the direction of the cooling device.
- the cooling device has in particular a cooling duct for guiding the cooling air, the cooling surface preferably pointing in the direction of the cooling duct and in particular forming a wall surface of the cooling duct.
- the cooling surface has pin-shaped profile bodies which preferably extend orthogonally to the cooling surface, in particular in the axial direction of the rotary tube.
- the pin-shaped profile bodies are optionally connected to one another, for example via connecting webs which are arranged between two adjacent profile bodies.
- connecting webs which are arranged between two adjacent profile bodies.
- the profile bodies preferably have a length that is greater than the thickness and width of the profile body.
- Turbulence is understood to mean areas of turbulent flow. In contrast to laminar flow, turbulent flow ensures better mixing of the flow. This means that the cooling air flowing past the cooling surface can better absorb and remove the heat emitted by the cooling surface. Overall, the pin-shaped profile bodies ensure more efficient cooling of the cooling surface of the protective segment.
- the profile bodies have an angular, in particular quadrangular, diamond-shaped or rectangular cross section.
- profile elements with an angular cross section redirect the cooling air flow so that turbulence is generated within the flow.
- the profile bodies have a round, in particular circular, cross section.
- the cooling surface with the profile bodies has a surface which is at least twice as large compared to a cooling surface without a profile body.
- An enlarged surface of the cooling surface ensures improved heat transfer from the cooling surface to the cooling air.
- the profile bodies are evenly spaced from one another. It is also conceivable that the profile bodies were at different distances from one another.
- the profile body according to a further embodiment arranged parallel to each other. This enables the cooling surface to be produced easily and leads to low pressure losses in the gap area.
- the profile bodies are spaced apart from one another, so that a gap is formed between two profile bodies.
- the cooling air preferably flows along that formed between the profile bodies Column and is deflected within this by the profile body, so that turbulence is generated within the cooling air flow.
- the gaps between the profile bodies form an undulating profile.
- the profile bodies are preferably arranged such that the gaps between the profile bodies run in an undulating manner. This enables a reliable generation of turbulence within the cooling air flow.
- the cooling surface has a plurality of profile bodies, some profile bodies having a round, in particular circular, cross section and some profile bodies having an angular, in particular square, diamond-shaped or rectangular cross section.
- the profile bodies with the angular cross section are preferably offset from the profile bodies with the round cross section.
- the profile bodies have an angular cross section, with one edge of each angular profile body pointing in the flow direction of the cooling air flow.
- the cooling air flow is deflected at the edge of the profile body, so that an at least partially turbulent flow is generated.
- the cooling device has a cooling channel for guiding the cooling air in the direction of the cooling surface.
- the cooling channel preferably extends in the circumferential direction of the rotary tube around the discharge end of the rotary tube and is arranged concentrically with the rotary tube.
- the preferably annular cooling duct borders in particular in the axial direction on the cooling surface of the protective segment.
- the cooling device preferably has a fan which blows cooling air into the cooling duct.
- the cooling device has a guide element which divides the cooling duct into a supply duct for supplying cool cooling air and a discharge duct for discharging heated cooling air.
- the guide element is preferably arranged at a distance from the cooling surface of the protective segment, so that cooling air flows from the supply duct along the cooling surface and subsequently into the discharge duct.
- the protective segment preferably has a fastening area which is fixedly connected, in particular screwed, to the discharge end of the furnace. The fastening area extends, for example, at an angle of approximately 30-90 °, preferably 40-85 °, in particular 50-80 °, to the cooling surface.
- An inner lining which comprises a plurality of stones and in which the fastening region lies against at least one stone and is firmly connected to it, is arranged in particular within the rotary tube.
- Fig. 1 shows a schematic representation of a furnace of a cement manufacturing plant with a protective segment in a sectional view according to an embodiment.
- FIG. 2 shows a schematic illustration of a section of a discharge end of the rotary tube of a furnace in a sectional illustration according to FIG. 1.
- FIG. 3 shows a schematic illustration of a section of a discharge end of the rotary tube of a furnace in a sectional illustration according to a further exemplary embodiment.
- FIG. 4 shows a schematic illustration of a protective segment of a furnace in a sectional view and a partial top view according to an exemplary embodiment.
- FIG. 5 shows a schematic illustration of a profile of a cooling surface of a protective segment in a plan view according to an exemplary embodiment.
- 6 shows a schematic illustration of a profile of a cooling surface of a protective segment in a top view according to a further exemplary embodiment.
- FIG. 7 shows a schematic illustration of a profile of a cooling surface of a protective segment in a top view according to a further exemplary embodiment.
- the furnace 10 has an outlet region 14, at which the fired clinker leaves the furnace 10 and enters the cooler 12, for example the clinker falls into the cooler 12 due to gravity, which is arranged below the furnace 10, preferably the outlet region 14. Of the furnace 10, only the rear region of the furnace 10 in the flow direction of the clinker is shown in FIG. 1.
- the furnace 10 is preferably a rotary tube furnace with a tubular rotary tube 22 which has a slight inclination to the horizontal of, for example, 1-10 °, in particular 2-5 °, preferably 3 °, and rotates about its central axis.
- the material to be burned preferably raw meal preheated in a preheater, not shown, is moved in the direction of the outlet region 14 by the rotation of the furnace 10. Inside the furnace 10, this has a combustion chamber 20 in which the raw meal is burned to clinker.
- a combustion device 16 is arranged in the outlet area 14, of which a fuel line 18 for guiding fuel, such as gas, to a burner is shown only schematically in FIG. 1.
- the fuel line 18 is arranged at least partially outside the combustion chamber 20, the burner being arranged inside the combustion chamber 20, preferably at the right end of the furnace 10 in FIG. 1, in the outlet region 14.
- the hottest region of the furnace 10 is therefore in the region in which the burner is arranged, which is why the temperatures in the outlet region 14 during operation of the furnace 10 are approximately 1200 ° C. to 1450 ° C.
- the outlet area 14 comprises the discharge end 24 of the rotary tube 22, in particular the outer edge of the rotary tube 22, via which the fired clinker is conveyed and leaves the furnace 10.
- the furnace also has a cooling device 26 for cooling the discharge end 24 of the rotary tube 22.
- the cooling device 26 comprises a blower 28, preferably a fan, for generating cooling air.
- the cooling air is passed through a line shown schematically in FIG. 1 to the discharge end 24 of the rotary tube 22 in order to cool it.
- a detailed illustration of the discharge end 24 of the rotary tube 22 is shown in FIG. 2.
- FIG. 1 also shows a cooler 12 connected downstream of the furnace 10, which preferably has a static grate 30 which is arranged below the discharge end 24 of the rotary kiln 22, so that the clinker falls from the discharge end 24 onto the static grate 30.
- the static grate 30 has an angle of approximately 5-30 °, preferably 10-20 °, to the horizontal, so that the clinker slips off the static grate 30.
- the static grate 30 is followed, for example, by a conveyor unit 32, which for example runs horizontally.
- the conveying unit 32 is used to transport the clinker in the conveying direction (from left to right in FIG. 1), cooling air flowing through the clinker during transport in a crossflow from below the conveying unit 32.
- the conveyor unit 32 is, for example, a moving floor conveyor with a plurality of parallel grate planks which can be moved simultaneously in the conveying direction and at the same time against the conveying direction.
- the grate planks serve to receive the clinker and cooling air flows through them from below, so that the clinker lying on the grate planks is cooled and simultaneously transported in the conveying direction.
- the conveyor unit can also be a push conveyor which has a stationary ventilation floor, preferably a grate, and a plurality of conveyor elements arranged above the ventilation floor.
- the conveying elements are arranged, for example, in planks and parallel to one another and at the same time can be moved in the conveying direction and at the same time counter to the conveying direction.
- a comminution device 34 connects to the conveying unit 32 of the cooler 12.
- the comminution device 34 is, for example, a crusher, preferably a roll crusher, or a mill, preferably a roll mill.
- preheated raw meal is introduced into the furnace 10 and transported in the latter by the rotation of the rotary tube 22 in the direction of the discharge end 24 and the burner, so that the raw meal is preferably heated uniformly and burned to cement clinker.
- the fired clinker falls over the discharge end 24 of the rotary tube 22 onto the static grate 30 of the cooler 12 arranged underneath and slips from it in the direction of the conveying unit 32.
- the conveying unit 32 the clinker is transported in the conveying direction and falls from the cooler at the end of the conveying unit 12 into the shredding device 34, in which the clinker is shredded.
- a conveyor belt on which the clinker falls is arranged after the cooler 12.
- the comminution device 34 is only optional.
- FIG. 2 shows a detailed illustration of the discharge end 24 of the rotary tube 22 of the cooler 10 according to FIG. 1, the same elements being provided with the same reference symbols.
- the rotary tube 22 has an inner lining, which preferably extends along the entire inner wall of the rotary tube 22 and comprises a lining with a plurality of stones 36, which are preferably made of refractory material, such as magnesia spinel.
- the stones 36 are arranged next to one another in such a way that they cover the entire inner wall of the rotary tube and form the contact surface for the material to be burned.
- the stones 36 preferably lie directly on the inner wall of the rotary tube 22 and are arranged next to one another in circumferential rows, for example.
- the discharge end 24 of the rotary tube 22 has, for example, two circumferential rows of stones 36, which are arranged elevated relative to the other stones 36 of the inner lining.
- a protective segment 38 is arranged between the at least one stone 36 and the rotary tube 22, for example.
- the protective segment 38 in particular a plurality of protective segments, forms the discharge edge of the rotary tube 22, via which the clinker is conveyed and from which the clinker falls into the cooler 12.
- the furnace 10 comprises a plurality of protective segments 38 which are arranged circumferentially next to one another and together form the entire circumferential circumferential discharge edge of the rotary tube 22.
- Around the discharge end 24 of the rotary tube 22 is a cooling channel 40 for cooling the Throwing end 24 of the rotary tube 22 arranged.
- the cooling channel 40 has a wall 42 which extends at a distance around the discharge end 24 of the rotary tube 22.
- the wall 42 extends at least partially concentrically to the rotary tube 22 and has an end region 48 which extends radially outward at an angle of, for example, 20-50 °, preferably 30-40 °, in particular 45 °, to the central axis of the rotary tube 22.
- the cooling duct 40 is connected to the fan 28, so that cooling air is conducted from the fan 28, for example via a line 50, preferably in the axial direction of the rotary tube 22, into the cooling duct 40.
- Each protective segment 38 has an outwardly facing wear surface 44 and an inwardly facing cooling surface 46.
- the wear surface 44 preferably points in the direction of the burner, in particular in the direction of the outlet area 14 of the furnace 10, in which temperatures of approximately 1200 ° C. to 1450 ° C. are present, the wear surface 44 being in direct contact with the temperatures in the outlet area 14.
- the clinker emerging from the rotary tube 12 flows along the wear surface 44 into the cooler 12.
- the wear surface 44 extends, for example, vertically, in particular in the radial direction of the rotary tube 22.
- the protective segment preferably forms the outermost surface in the axial direction of the rotary tube 22, in particular the End face of the rotary tube 22.
- the cooling surface 46 points in the direction of the cooling duct 40 and forms the end wall of the cooling duct 40, the cooling air initially flowing axially in the cooling duct 40 striking the cooling surface 46 of the protective segment 38 and being deflected thereon in such a way that it flows at least partially or completely in the circumferential direction of the rotary tube 22 and preferably directly along the cooling surface 46 of the protective segment 38.
- the cooling air absorbs the heat of the cooling surface 46 and then flows out of the cooling surface 46 in the axial direction of the rotary tube 22 out of the cooling channel 40.
- the protective segment 38 is preferably in contact with at least one stone 36 with the upper end and with the lower end against the wall 42 of the cooling duct 40, so that the cooling duct 40 is separated from the ambient air by the protective segment 38.
- the protective segment 38 is preferably fastened to the wall 42 by means of a fastening element 52.
- the fastening element 52 is, for example, a sleeve or a sleeve segment with an edge pointing radially inwards, the fastening element 52 being screwed to the wall 42.
- the edge of the sleeve or the sleeve segment lies on the outside of the protective segment 38 and clamps it between the wall 42 and the edge, so that movement in particular in the axial direction of the rotary tube 22 is prevented.
- the protective segment 38 and the wall 42 of the cooling channel 40 are firmly connected to the rotary tube 22, so that the protective segment 38 and the wall 42 of the cooling channel 40 rotate with the rotary tube 22.
- the furnace 10 also has, for example, an outer wall 54, which is preferably part of the outlet region 14 of the furnace 10 and extends, for example, in the vertical direction in FIG. 2. Between the outer wall 54 and the wall 42 of the cooling channel 40, a seal 56, preferably a simple gap seal, is attached, which prevents clinker from the outlet area 14 of the furnace 10 from passing between the stationary outer wall 54 and the rotating rotary tube 22. Other embodiments of the seal are possible.
- the seal has, for example, a first sealing segment fastened to the wall 42, which rotates with the rotary tube 22, and a second sealing segment fastened to the outer wall 54, which is stationary.
- the sealing segments are arranged relative to one another in such a way that there is a gap between them, which preferably has a size of 5-10 mm, in order to prevent sliding contact between the sealing segments and nevertheless prevent clinker from escaping.
- FIG. 3 shows a detailed illustration of the discharge end 24 of the rotary tube 22 of the cooler 10, which essentially corresponds to FIG. 2 and the same elements are provided with the same reference symbols.
- the cooling channel 40 of FIG. 3 has a guide element 45 which divides the cooling channel 40 into two channels, preferably a feed channel 41 and a discharge channel 43.
- the guide element 45 is, for example, a separating plate which is in the center is attached within the cooling channel 40 and extends in the axial direction of the rotary tube 22.
- the guide element 45 preferably extends over the entire width, in particular in the circumferential direction, of the cooling channel 40.
- a gap is formed between the guide element 45 and the cooling surface 46, through which the cooling air flows from the supply channel 41 along the cooling surface 46 into the discharge channel 43.
- the cooling air preferably flows along the cooling surface 46 in the radial direction, in particular from the inside to the outside.
- the Supply duct 41 is preferably connected directly to the fan 28 via the line 50 and serves to supply cool cooling air to the cooling surface 46 of the protective segment 38.
- the discharge duct 43 connects to the supply duct 41 in the flow direction of the cooling air and serves to discharge the other Cooling surface 46 heated cooling air from the duct 40.
- the discharge duct 43 is preferably connected to the ambient air, so that the heated cooling air is supplied to the surroundings.
- the feed channel 41 is arranged radially inward, in the direction of the rotary tube 22 relative to the discharge channel 43.
- the guide element 45 is preferably fastened by means of a static connection.
- FIG. 4 shows a protective segment 38 as described with reference to FIGS. 2 and 3.
- the protective segment 38 has a T-profile which comprises three legs which are essentially plate-shaped.
- a first leg is a fastening area 60 of the protective segment 38, which bears against the inner lining of the rotary tube 22, in particular against a stone 36, and is fastened to this by means of a fastening means such as a screw.
- the fastening area 60 is, for example, plate-shaped and extends in particular orthogonally to the wear surface 44.
- the fastening area 60 of the protective segment 38 lies in the installation position, for example in FIGS screwed. With the lower surface, the fastening area 60 bears against the inside of the rotary tube 22 and is screwed to it, for example.
- a second leg of the protective segment 38 extends orthogonally to the fastening region 60 and lies against a stone 36 in the installation position of FIGS. 2 and 3.
- a third leg of the protective segment 38 extends in FIG. 4 by way of example at an angle of approximately 45-90 °, in particular 60-80 °, preferably 70 ° to the fastening area 60, in particular below the fastening area. It is also conceivable for the second and third legs to be arranged parallel to one another, preferably in each case orthogonally to the fastening region 60.
- the wear region 44 extends over the outward-facing side of the second and the third leg of the protective segment 38.
- the third leg has the cooling surface 46 on the inward-facing side.
- the cooling surface 46 has a profile which comprises a plurality of profile bodies 58 which are designed as elevations and extend in the direction of the cooling channel 40, in particular parallel to the fastening region 60 of the protective segment 38.
- the profile bodies 58 are each pin-shaped and have a square, for example diamond-shaped cross section.
- the profile bodies 58 are arranged parallel to one another and, for example, all have the same orientation.
- the cooling air flows in the circumferential direction (FIG. 2) or in the radial direction of the rotary tube (FIG. 3), preferably from the inside outward, along the cooling surface 46.
- the profile bodies 58 preferably extend orthogonally to the flow direction of the cooling air.
- the profile bodies 58 are arranged at a distance from one another, so that a gap is formed between each two adjacent profile bodies 58 through which cooling air can flow.
- the profile bodies 58 all have the same cross section and preferably the same length. It is also conceivable that the size of the cross section of the profile body 58 varies.
- the profile bodies 58 are preferably evenly spaced from one another, so that the width of the respective gap between two profile bodies 58 is constant over the entire cooling surface.
- the profile bodies 58 are preferably arranged so as to be uniformly offset from one another.
- a profile body preferably has a length of at least 30 mm.
- the profile bodies 58 can also be connected to one another by webs, so that a wave-shaped gap is formed.
- Fig. 4 also shows the fan 28 which generates the cooling air flow.
- the arrows represent the direction of flow of the cooling air.
- the cooling air flows, preferably in the axial direction of the rotary tube 22, through the cooling channel 40.
- the cooling air hits the cooling surface 46, it is preferably deflected in the radial direction of the rotary tube 22 , so that the cooling air flows radially outward along the cooling surface 46.
- the cooling air flows in the circumferential direction of the rotary tube 22 along the cooling surface.
- the arrows represent the respective flow direction of the cooling air Profile body 58 aligned such that an edge of the square cross section points in the flow direction of the cooling air, so that the cooling air impinges on the edge of the profile body and is deflected thereon.
- FIG. 5 also shows a profile of the cooling surface 46 with a plurality of profile bodies 58, the cooling surface 46 essentially corresponding to the cooling surface 46 shown in FIG. 3.
- the same elements have the same reference numerals.
- the profile bodies 58 have a round, in particular circular, cross section.
- FIG. 6 also shows a profile of the cooling surface 46 with a plurality of profile bodies 58, the cooling surface 46 essentially corresponding to the cooling surface 46 shown in FIG. 4 or 5.
- the same elements have the same reference numerals.
- two different types of profile bodies 58 are shown in FIG. 6.
- a first type of profile body 58 has a square, in particular diamond-shaped cross section, and a second type of profile body 58 has a round, in particular circular cross section.
- the two types of profile bodies 58 are preferably arranged uniformly distributed over the cooling surface 46. In each case a round profile body 58 is arranged adjacent to a square profile body.
- FIG. 7 also shows a profile of the cooling surface 46 with a plurality of profile bodies 58, the cooling surface 46 essentially corresponding to the cooling surface 46 shown in FIG. 4, 5 or 6.
- the profile bodies 58 of FIG. 7 have a rectangular cross section. All the profile bodies 58 preferably have a rectangular cross section, the profile bodies 58 being designed in the form of a plate.
- the profile bodies 58 are arranged relative to one another in such a way that a gap is formed in each case between two adjacent profile bodies 58, the gaps forming a wavy pattern over the cooling surface 46.
- the profile bodies 58 are preferably arranged in a wave shape with respect to one another.
- the cooling air flows in the direction of the arrow along the profile bodies 58, these being arranged in such a way that turbulence is caused in the cooling air flow.
- the profile bodies 58 of the previously described profiles of FIGS. 4-7 are preferably arranged such that cooling air flowing along the profile bodies 58, preferably along the cooling surface 46, is deflected such that turbulence occurs in the cooling air flow. Turbulence is understood to mean areas of turbulent flow.
- the profile bodies 58 are arranged such that at least one area is formed in the cooling air flow in which there is a turbulent flow. In contrast to a laminar flow, a turbulent flow ensures better mixing of the cooling air flow. The distances must be set so that an optimum of better mixing and low pressure loss is achieved. This leads to a more effective cooling of the protective segment 38, in particular the cooling surface 46, since the heated cooling air is mixed quickly and efficiently with the cooler cooling air and the full volume flow is available.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018220727.5A DE102018220727A1 (de) | 2018-11-30 | 2018-11-30 | Ofen mit einem Schutzsegment am Ofenauslauf |
| PCT/EP2019/082348 WO2020109199A1 (de) | 2018-11-30 | 2019-11-25 | Ofen mit einem schutzsegment am ofenauslauf |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3887738A1 true EP3887738A1 (de) | 2021-10-06 |
Family
ID=68696419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19809445.0A Pending EP3887738A1 (de) | 2018-11-30 | 2019-11-25 | Ofen mit einem schutzsegment am ofenauslauf |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12018890B2 (de) |
| EP (1) | EP3887738A1 (de) |
| CN (1) | CN113167532B (de) |
| DE (1) | DE102018220727A1 (de) |
| WO (1) | WO2020109199A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018220727A1 (de) * | 2018-11-30 | 2020-06-04 | Thyssenkrupp Ag | Ofen mit einem Schutzsegment am Ofenauslauf |
| CN114646222B (zh) * | 2022-03-25 | 2023-07-21 | 上海宝冶冶金工程有限公司 | 一种环形冷却梁及双膛窑 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29618528U1 (de) * | 1996-10-24 | 1997-01-02 | GESTAGUSS Gesellschaft für Stahl- und Gußerzeugnisse mbH, 42551 Velbert | Schutzsegmente aus Stahlguß für die Zement-, Kalk- und Gipsindustrie |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3682453A (en) * | 1970-11-23 | 1972-08-08 | California Portland Cement Co | Rotary kiln nose ring |
| DE2229951C2 (de) * | 1972-06-20 | 1974-02-14 | Karl Steffens Gmbh, 4032 Lintorf | Verfahren und Vorrichtung zum Kühlen von aus metallenen Segmenten bestehenden Auslaufringen an Drehrohröfen, insbesondere zur Zementherstellung |
| US4212632A (en) * | 1979-05-02 | 1980-07-15 | Allis-Chalmers Corporation | Cooling arrangement for rotary kiln |
| GB9615077D0 (en) * | 1996-07-18 | 1996-09-04 | Blue Circle Ind Plc | Improvements in rotary kilns |
| US6942025B2 (en) * | 2000-09-20 | 2005-09-13 | Degree Controls, Inc. | Uniform heat dissipating and cooling heat sink |
| DE10317307B4 (de) * | 2003-04-14 | 2007-11-15 | Rheinkalk Gmbh | Vorrichtung sowie Verfahren zum Brennen von Kalkstein oder Dolomit |
| DE102004014872A1 (de) * | 2004-03-26 | 2005-10-13 | Khd Humboldt Wedag Ag | Auslaufende eines Drehrohrofens |
| CN101984318A (zh) * | 2010-12-01 | 2011-03-09 | 新兴河北工程技术有限公司 | 一种球团回转窑窑尾 |
| JP5455962B2 (ja) | 2011-04-06 | 2014-03-26 | 三菱重工業株式会社 | 冷却構造の製造方法 |
| US9746243B2 (en) * | 2011-12-23 | 2017-08-29 | Fives Fcb | Device for cooling the opening of a rotary kiln by means of cool air-blowing |
| JP6262422B2 (ja) | 2012-10-02 | 2018-01-17 | 昭和電工株式会社 | 冷却装置および半導体装置 |
| CN105674730B (zh) * | 2015-12-31 | 2017-12-12 | 张英华 | 铁矿烧结与筛选一体机 |
| DE102018220727A1 (de) * | 2018-11-30 | 2020-06-04 | Thyssenkrupp Ag | Ofen mit einem Schutzsegment am Ofenauslauf |
-
2018
- 2018-11-30 DE DE102018220727.5A patent/DE102018220727A1/de active Pending
-
2019
- 2019-11-25 EP EP19809445.0A patent/EP3887738A1/de active Pending
- 2019-11-25 WO PCT/EP2019/082348 patent/WO2020109199A1/de not_active Ceased
- 2019-11-25 CN CN201980078673.XA patent/CN113167532B/zh active Active
- 2019-11-25 US US17/295,684 patent/US12018890B2/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29618528U1 (de) * | 1996-10-24 | 1997-01-02 | GESTAGUSS Gesellschaft für Stahl- und Gußerzeugnisse mbH, 42551 Velbert | Schutzsegmente aus Stahlguß für die Zement-, Kalk- und Gipsindustrie |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020109199A1 (de) | 2020-06-04 |
| US20220018599A1 (en) | 2022-01-20 |
| DE102018220727A1 (de) | 2020-06-04 |
| US12018890B2 (en) | 2024-06-25 |
| CN113167532B (zh) | 2023-09-01 |
| CN113167532A (zh) | 2021-07-23 |
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