EP0801721A1 - Austauschbare düse für feuerfest ausgekleidete hochtemperaturreaktoren - Google Patents
Austauschbare düse für feuerfest ausgekleidete hochtemperaturreaktorenInfo
- Publication number
- EP0801721A1 EP0801721A1 EP96900301A EP96900301A EP0801721A1 EP 0801721 A1 EP0801721 A1 EP 0801721A1 EP 96900301 A EP96900301 A EP 96900301A EP 96900301 A EP96900301 A EP 96900301A EP 0801721 A1 EP0801721 A1 EP 0801721A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- reactor
- block
- lining
- stone
- 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
Links
Classifications
-
- 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
- F27D1/14—Supports for linings
- F27D1/145—Assembling elements
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
Definitions
- the invention relates to an exchangeable nozzle according to the preamble of claim 1.
- fan angle nozzles or fan nozzles are used in the interior of heat exchangers for cement rotary kilns parallel or perpendicular to the bricked-up or plastered wall.
- the regular caking of raw cement flour is removed by air blows, so that an optimal heat exchange process / material flow is achieved.
- the alternative, accident-prone labor-intensive removal by hand with air lances or poking rods through openings in the heat exchanger wall is avoided. If the mouthpiece of the fan nozzles wears out or is consumed by chemical reaction, the large-scale cleaning effect drops. Then, or at the latest when the stove is stopped, each of the heat exchangers must be equipped, the stoneware and the old nozzle removed, a new nozzle welded in and the cavity filled with fireclay mortar.
- the object of the invention is to provide an interchangeable nozzle or an interchangeable nozzle system which enables simple replacement of nozzles, in particular cleaning air jet nozzles, in high-temperature reactors.
- the invention allows a simple change of the nozzle from the outside without internal setup and possibly even without complete cooling of the high-temperature reactor or heat exchanger.
- a replaceable nozzle according to the invention thus comprises, in addition to the nozzle body penetrating the reactor wall and the fluid supply pipe connected to it (at least insofar as a corresponding pipe section penetrates the reactor wall), a nozzle block enveloping the nozzle body over its entire circumference and at least partially over its length, with its radial side walls having an exact fit can be used in the high-temperature lining of the reactor, a separating layer serving as an expansion collar being provided between the nozzle body and the nozzle block and a further separating layer between the nozzle block and the contoured reactor lining thereon, which separates the nozzle block from the reactor lining in the event of a nozzle replacement allowed.
- the envelope shape of the reactor lining in which the nozzle block is inserted with a precise fit can be used both on site, ie. H. be produced immediately during the installation of the nozzle block and nozzle body, as well as be prefabricated, in order to fit into a correspondingly large opening in the reactor lining, e.g. B. with the interposition of a layer of mortar to be installed.
- a third possibility for the production of the envelope mold for the precisely fitting reception of the nozzle block is the production of the envelope mold described further below while the reactor lining is being produced.
- the nozzle block preferably consists essentially of high-temperature-resistant silicon carbide.
- the preferably metallic nozzle body which is installed in the nozzle block with a precise fit and protected, can be detached from the nozzle block, ie scaling or incrustations preventing loosening do not occur on. Rather, the different materials (material pair silicon carbide / steel) allow a comparatively easy disassembly even after use.
- the nozzle stone can be removed from its envelope shape after use, in particular pulled out, so that a new unit consisting of nozzle body and nozzle stone as an exchange package in the envelope can be quickly replaced.
- silicon carbide for the nozzle block can advantageously be used irrespective of the features of the exchangeable nozzle or of the interchangeable nozzle system.
- the use of silicon carbide as the material for the nozzle block is also advantageous because it has a high wear resistance and a low tendency to bake on the surface facing the inside of the reactor.
- a stiffening or fastening frame such as an angular frame, enables the nozzle body and nozzle block to be easily attached to the reactor wall, in particular when using a flange plate according to the invention.
- a frame of this type enables the flange plate to be easily positioned, the opening in the Reactor wall and provides the necessary free space for mounting the nozzle.
- the expansion collar according to the invention serves, on the one hand, to seal between the nozzle block and the metallic nozzle body, and on the other hand to compensate for the various coefficients of thermal expansion and is preferably composed of approximately 10 mm thick ceramic fiber fleece or glass fiber needle felt.
- Fan angle nozzles known from the prior art protrude with their metallic nozzle body into the reaction space.
- the metallic nozzle body can be opened up to the outlet opening of the nozzle Protective stone surrounding the inside of the reaction chamber can be provided.
- a separating layer is likewise arranged between the protective stone and the metallic nozzle body.
- the protective stone can grip around the metallic nozzle body and be held in a form-fitting manner by the metallic nozzle body. Since the blow-out direction of the fan nozzles generally points essentially downwards, the protective stone can be designed such that it can be plugged onto the metallic nozzle body parallel to the reaction chamber wall from above. The positive connection prevents slipping downwards, to the side and in the direction of the center of the reactor, while gravity and generally also the direction of material flow in the reactor prevent slipping upwards.
- the size of the protective stone or the opening in the reaction chamber wall are preferably adapted such that the protective stone with the nozzle can be removed from the reaction chamber wall.
- the fan nozzle is arranged in such a way that the protective stone is not held in position by gravity, by choosing suitable geometrical relationships of the nozzle stone, protective stone and cover stone in the installation position, a positive connection can be formed between cover stone and cover stone, which slips off of the protective stone against the direction of attachment prevented.
- FIG. 1 shows a first embodiment of an interchangeable fan angle nozzle according to the invention, installed in a reactor wall, in axial section through the nozzle body - section along line A-A according to FIG. 2;
- FIG. 2 shows the same fan angle nozzle in a sectional view - section along the line B-B according to FIG. 1 and FIG. 3;
- Fig. 4 shows a second embodiment of an inventive
- FIG. 5 shows a further sectional representation of the same fan nozzle (corresponding to the sectional representation in FIG. 2) - section along the line B'-B 'according to FIG. 4 and 6;
- FIGS. 4 and 5 shows the same fan nozzle in section along the line CC according to FIGS. 4 and 5 (corresponding to the type of representation in Fig. 3) and
- FIG. 7 shows a third embodiment of an exchangeable fan nozzle - corresponding to the representation in FIG. 5.
- the interchangeable nozzle ie the entire exchangeable nozzle system
- a metallic nozzle body 2 is a so-called Fan nozzle designed, wherein in the embodiment according to Figures 1 to 3, the blow-out direction of the nozzle through the air outlet gap 20 is tangential to the brick lining 6 on the reactor inside 10 of the reactor wall 11.
- the blow-out direction is inclined only slightly with respect to the normal direction of the reactor wall 11.
- the nozzle body 2 penetrates the lining, i. H.
- the lining 6 of the reactor wall 11 in the area located towards the reactor interior 10.
- the metallic nozzle body 2 and at least that area of the tube 21 which faces the reactor interior 10 are closely enclosed by an expansion collar 3.
- This expansion collar consists of a circumferential band made of elastic, high-temperature-resistant material, in particular of an approximately 10 mm thick ceramic fiber fleece or a glass fiber needle felt.
- the part of the nozzle body 2 and the tube 21 penetrating the reactor wall 11 is at least in the area facing the reactor interior 10 positively surrounded by a so-called nozzle stone 4, which essentially consists of high-temperature resistant silicon carbide.
- the surface of the nozzle block 4 pointing radially outward with respect to the nozzle body 2 and the tube 21 forms a trapezoidal plan in the embodiment according to FIGS. 1 to 3 and a rectangular plan with the corner areas in the embodiments according to FIGS. the surfaces pointing radially outwards are inclined slightly conically towards one another in the direction of the reactor interior 10.
- the enveloping mold 60 is part of an independent component, namely a so-called enveloping brick 60, which can be retrofitted into an already existing and bricked-up reactor, which will be explained in more detail below.
- the embodiment according to FIG. 7 differs from this in that, in the exemplary embodiment according to FIG. 7, the cladding stone 60 is already provided in the lining 6 from the beginning or is even an integral part of the lining 6 or is procured "in situ" in the lining 6.
- the opening in the opening which enables the replacement of the nozzle block together with the nozzle body
- Reactor wall surrounded by an angle frame 74, which takes over the function of a stiffening and / or fastening frame.
- this angle frame 74 is inserted into an opening of the metallic outer wall of the reactor which is shaped in accordance with the outer contour of the angle frame, in such a way that the wall-parallel angle frame flange is offset inwards parallel to the outer surface of the reactor wall.
- the opening in the metallic outer wall of the reactor corresponds to the clear opening of the angular frame 74.
- the angular frame 74 is firmly connected to the metallic outer wall of the reactor by a weld seam 75. the.
- a flange plate 7 which can be firmly screwed to the wall-parallel leg of the angular frame 74 via retaining screws 73 carries - in all exemplary embodiments - the nozzle body 2 and the nozzle block 4.
- the exact positioning of the one or more nozzles necessary in a reactor is determined, eg. B. to prevent caking at certain points in the reactor. If external stiffeners are provided on the outer steel jacket of the furnace in the area provided for the nozzle, these are first removed. A hole is then cut in the steel jacket, for the precise dimensioning of which the angle frame 74 serves as a template. Then the brick lining of the furnace is broken in the area of the opening in the steel jacket, e.g. B. determined by means of a core hole and the actual wall thickness of the lining at the intended installation position for the nozzle. The lining in the area of the nozzle installation location is then removed in such a way that the wall opening corresponds to the outer contour of a prefabricated cover stone 60. This is preferably stepped or tapered towards the inside of the reactor, so that from the outside it is possible to install the cladding stone in the lining with the best possible fit and good fit.
- the cladding stone is provided at its front end opposite the inside of the furnace with retaining brackets 61 protruding from it, in particular made of stainless steel.
- This bracket 61 can also form a peripheral frame.
- the depth of the enveloping stone 60 is 180 mm, while the depth of the leg of the holding bracket 61 projecting beyond it is additionally 70 mm, so that there is a total installation depth of 250 mm. This can also be varied if necessary.
- the aim is that the furnace-side end face of the cladding stone is flush with the inside of the reactor walls. If the masonry in the furnace does not run parallel to the steel wall on the outside, B. may be the case in the lower furnace area, the cladding stone 60 and / or its holding frame 61 is lengthened or shortened in accordance with the requirements for parallel installation for lining.
- Threaded rods 44 are used for the installation of the enveloping block, which are or are inserted into the receptacle or adjusting bores 62 of the enveloping block 60 and penetrate bores in the wall-parallel flange of the angle frame 64. The positioning of the enveloping stone 60 in its normal direction
- the insertion direction extending across the reactor wall is set by means of the threaded rods 44 or threaded nuts rotatably arranged thereon.
- Pierced flat bars serve as the so-called setting angle 45, through the bore of which a threaded rod 44 runs.
- These so-called setting angle 45 can be pivoted about the threaded rod axis and serve u. a. as an assembly aid when inserting the nozzle block 4 together with the nozzle body 2 into the conical opening in the enveloping block 60.
- the legs of the envelope-holding frame 61 which are oriented transversely to the reactor wall are dimensioned such that they abut under the angle frame 74 and can be welded to it by longitudinal seams 25. Only after inserting the casing 60 with the casing holder frame 61 attached to it and the angle frame 74 welded to it into the prepared reactor wall opening is the angle frame 74 welded to the steel jacket of the reactor wall 11 in the manner described above. This creates the prerequisites for the installation and the subsequent replacement of the nozzle block 4 together with the nozzle body 2.
- the conical nozzle stone circumference is covered with approximately 3 mm thick ceramic fiber paper, which extends over the entire nozzle stone height.
- a nozzle block screw connection 40 is provided with respect to the flange plate 7, which holds the nozzle body 2 together with the nozzle block 4.
- the tube 21 of the nozzle body 2 which penetrates a correspondingly large bore in the flange plate 7, is welded to the flange plate 7 in a circumferentially tight manner.
- the unit consisting of flange plate 7, nozzle body 2 and casing 4 can then be pulled out of the reactor wall opening or reinserted into it, if necessary.
- an elastic seal 71 is preferably used for sealing and releasable connection between the flange plate 7 and the wall-parallel leg of the angle frame 74.
- This interchangeable nozzle system allows defective nozzles to be exchanged from the outside in a very short downtime of the reactor. It is not necessary to walk inside the reactor. The change can be made within about 1 hour.
- the free space remaining between the flange plate 7 and the outer end face of the nozzle block 4 and the cladding block 60 can be filled with insulating wool 8 or chamotte mortar.
- the nozzle block can also be divided and wrapped with a circumferential band for better assembly.
- the shell mold 60 can also be provided by mortaring the cavity between the nozzle block and the brick lining from the inside of the reactor.
- the fan nozzle is dismantled together with the nozzle block and the flange plate.
- the reactor does not need to be completely cooled down first.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29500061U | 1995-01-05 | ||
DE29500061 | 1995-01-05 | ||
PCT/EP1996/000034 WO1996021132A1 (de) | 1995-01-05 | 1996-01-05 | Austauschbare düse für feuerfest ausgekleidete hochtemperaturreaktoren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0801721A1 true EP0801721A1 (de) | 1997-10-22 |
EP0801721B1 EP0801721B1 (de) | 1999-09-08 |
Family
ID=8002152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96900301A Expired - Lifetime EP0801721B1 (de) | 1995-01-05 | 1996-01-05 | Austauschbare düse für feuerfest ausgekleidete hochtemperaturreaktoren |
Country Status (4)
Country | Link |
---|---|
US (1) | US5865617A (de) |
EP (1) | EP0801721B1 (de) |
DE (1) | DE59602998D1 (de) |
WO (1) | WO1996021132A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29518283U1 (de) * | 1995-11-17 | 1996-01-04 | Agrichema Materialflußtechnik GmbH, 55257 Budenheim | Heißbranddüse mit Wechselrohr |
US7968047B2 (en) * | 2005-02-10 | 2011-06-28 | Wahl Refractory Solutions, Llc | Blaster nozzle |
US8236235B2 (en) | 2007-04-27 | 2012-08-07 | Martin Engineering Company | Removable nozzle for use with air cannons and aerators and method for replacing same |
DE102008060876B4 (de) * | 2008-12-09 | 2011-06-22 | Sentürk, Meryem, 59071 | Anschlusstechnik für Luftdüsen in Brennkammern mit Wirbelschichtfeuerungen |
DE202010001227U1 (de) | 2010-01-20 | 2011-06-01 | VSR Industrietechnik GmbH, 47198 | Behälter mit Fluideinlassvorrichtung und Wechseldüse für Fluideinlassvorrichtung |
US20130087633A1 (en) * | 2011-10-11 | 2013-04-11 | Hirotaka Fukanuma | Cold spray gun |
CN109798792B (zh) * | 2019-03-22 | 2024-04-12 | 山东恒辉节能技术集团有限公司 | 一种余热回收的换热设备 |
CN117643979B (zh) * | 2024-01-26 | 2024-04-16 | 山东硅瓷新材料有限公司 | 一种碳化硅喷嘴 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1477517A (en) * | 1921-02-05 | 1923-12-11 | Andrew W Newberry | Apparatus for burning cement material |
SE325092B (de) * | 1965-09-15 | 1970-06-22 | Landsverk Ab | |
US3735906A (en) * | 1971-03-15 | 1973-05-29 | Juten M A Washington | Replaceable molten metal nozzle structure |
US3784107A (en) * | 1972-10-25 | 1974-01-08 | Allis Chalmers | Nozzle for rotary kiln |
US3946949A (en) * | 1974-09-04 | 1976-03-30 | Allis-Chalmers Corporation | Nozzle for rotary kiln |
JPS5830485B2 (ja) * | 1978-06-14 | 1983-06-29 | 品川白煉瓦株式会社 | セラミツクス製のエアノズルを有するバ−ナ |
DE2952275A1 (de) * | 1979-12-24 | 1981-07-02 | Fried. Krupp Gmbh, 4300 Essen | Vorrichtung zur begasung eines drehrohrofens |
DE3137122A1 (de) * | 1981-09-18 | 1983-04-07 | Metallgesellschaft Ag, 6000 Frankfurt | Duesenstein fuer drehrohroefen |
US4373909A (en) * | 1981-11-23 | 1983-02-15 | Allis-Chalmers Corporation | Gas injecting kiln shell nozzle with particle entry barriers |
DE3674035D1 (de) * | 1985-03-06 | 1990-10-18 | Agrichema Materialflusstechnik | Einrichtung zum auswechselbaren einbau von ins innere eines reaktionsgefaesses gerichteten betriebselementen. |
DE4009301C1 (en) * | 1990-03-23 | 1991-05-23 | Juenger + Graeter Gmbh & Co. Feuerfestbau, 6830 Schwetzingen, De | Nozzle plate for refuse incinerator - with air channels in nozzle block leading to combustion space to register with outlet bores |
-
1996
- 1996-01-05 EP EP96900301A patent/EP0801721B1/de not_active Expired - Lifetime
- 1996-01-05 WO PCT/EP1996/000034 patent/WO1996021132A1/de active IP Right Grant
- 1996-01-05 US US08/860,607 patent/US5865617A/en not_active Expired - Fee Related
- 1996-01-05 DE DE59602998T patent/DE59602998D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9621132A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59602998D1 (de) | 1999-10-14 |
EP0801721B1 (de) | 1999-09-08 |
WO1996021132A1 (de) | 1996-07-11 |
US5865617A (en) | 1999-02-02 |
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