AU634201B2

AU634201B2 - Outer refractory wall for heating or heat transfer apparatus and a panel therefor

Info

Publication number: AU634201B2
Application number: AU48704/90A
Authority: AU
Inventors: Donald Edward Curt Colley
Original assignee: REFRACTORY NOMINEES Pty Ltd
Current assignee: REFRACTORY NOMINEES Pty Ltd
Priority date: 1989-01-20
Filing date: 1990-01-22
Publication date: 1993-02-18
Anticipated expiration: 2010-01-22
Also published as: AU4870490A

Description

PATENTS ACT 1952 COMPLETE SPECIFICATION (ORI GINAL) FOR OFFICE USE: 4~Ob Application Number: Lodged: Class Int. Class Complete Specification Lodged: Acrccpted: Published: Pricr~u': Rdlaied Art: 'a 'a, Name of Applicant(s): REF-CRE 1 k111W.V- I MTTE-P Cj if's e el-" 113VI Address of Applicant(s): Actualrfnventor(s): 27 Stebbing Road

MADDIINGTON

Western Australia AUSTRALI A DONALD EDWARD CURT COLLEY Address for Service-, Kelvin Lord Co., 4 Douro Place, WEST PERTH, Western A'astralia 6005.

e z 1 8, 1 Complete Specification for the invention entitled: "OUTER REFRACTORY WALL FOR HEATING OR HEAT TRANSFER APPARATUS AND PANEL THEREFOR" The following statement is a full description of this invention, including tho, best method of performing it known to me/us

II

2 The present invention relates to a panel for an outer refractory wall. An outer refractory wall for the exterior of a large scale heating or heat transfer apparatus, and a method of installation of an outer refractory wall on the exterior of a large scale heating or heat transfer apparatus.

Large scale heating or heat transfer apparatus is generally provided with a refractory wall therearound to reduce or 0 contain heat transfer from the apparatus. Typically, the 10 large scale heating or heat transfer apparatus may be a boiler or kiln.

Conventional refractory walls are often free standing tile or brick walls. Such walls are susceptibli problems.

Movement and vibration of the heating or heat transfer apparatus may cause tiles or bricks to become dislodged an.

cause breaking down of the jointing between such materials. This allows tiles or bricks to fall against the heating or heat exchange apparatus which may create restriction of gases, hot spots on the steelwork where hot 20 gases penetrate, and in some cases where tile or brick pieces actually fall down between the refractory wall and tubes or contents of the apparatus, a possibility of bending of such tubes and/or collapses of content, and forming of a fracture.

Down time can also be significant to repair damage, and repair work is often difficult.

In accordarce with a first aspect of the present invention there is provided -a pano- for a- r-ractory wall eemp.r-i gipla~e- me-ns-a&nd-a- -tOee--le-£- e- t a-y-e e e P j 1 2 3 4 6 7 8 9 11 S.2 13 14 16 S17 18 19 21 22 23 24 26 27 28 29 t' y3 0 4'\ 2a a panel for a refractory wall comprising plate means, a layer of material comprising heat insulating material and a layer of material comprising refractory castable material, said layer of material comprising heat insulating material being intermediate said plate means and said layer of material comprising refractory castable material.

In accordance with a second aspect of the present invention there is provided an outer refractory wall for the exterior of a large scale he Lting or heat transfer apparatus comprising a pl'-.ality of panels connected to existing support framework of said heating or heat transfer apparatus, each of said panels comprising a panel for a refractory wall comprising plate means, a layer of material comprising heat insulating material and a layer of material comprising refractory castable material, said layer of material comprising heat insulating material being intermediate said plate means and said layer of material comprising refractory castable material.

In accordance with a third aspect of the present invention there is provided a method of installation of an outer refractory wall on the exterior of a large scale heating or heat transfer apparatus comprising connecting a plurality of panels to existing support framework of said heating or heat transfer apparatus, each of said panels comprising a panel for a refractory wall comprising plate means, a layer of material comprising heat insulating material and a layer of material comprising refractory castable material, said layer of material comprising heat insulating material being intermediate said plate means and said layer of material I -1 41" r~l~lggl~dgIL~ 1 2b 2 comprising refractory castable material.

3 4 6 7 8 9 11 12 13 14 .16 17 18 19 21 22 :24 26 27 28 29 ~;li~Bi~Bi~i~WrBBL~ -3- -I-n-a-Gc-or-d-a-e-w-i- ha-s-end-a-&pe et-o -t -~r-esent-i--n--iGn-.t-he-r-e- s-p-r-o-v--i e-a n-ou a-tx -la-r~-escal-e-~cea-i~-ng----- he-at *t-r-a-n-s-f-er-a-ppa-r-a-tu-s-- comp-r--ing- i a-ne-Is -ata-ched-to-exi-sti-ng---su-ppe-r-t---f-ram e&-s-a-id-ke-ating or heat -t-r-a-n-sf-e-r---appa-r-at-u-s-r--s-a-i- l---eompr-s-i-ng--p-l-a- -t-me-a-n-s -and--a-t-l-e-a-s-t-one-l-aye-r--of--- -east---one- othe r material.

In accordance -with-a t-h. d aspect-- -the p-r-esent invention -there is prov-ided-a e-thod of- installation of an outer 99** .e 1 ref ractor-y- wall n -the exte-r-ior--of--a--arge -scale--heating or heat--- tran-sf apparatus comprising attaching- a plurality of .9~*pane4.s- _i heat ransfer apparatus, said panels comprising plate -means -at---le -t--o-ne---l-aye of-at-- a-s-t--e-ne-othe-r- -a~t-e i-- The present invention will now be described, by way of example, with reference to the accompanyiag drawings, wherein: Figure 1 is a.perspective view of a panel in accordance with one aspect of the present invention; 20 Figure 2 is a cross-secitonal end view of the panel shown in Figure 1 along the line A-A; Figure is an elevation view of an outer refractory wall, formed of paeLels shown I i Figure 1, on the exterior ot a large scale heating or heat transfer apparatus in accordance with another aspect of the present invention; Figure 4 is cross-sectional. view through the line B-B shown in Figure 3; Figure 5 is a cross-sectronal view through the line C-C shown in Figure 3 but also showing how an existing tile l~ B~ 4 wall can be accommodated; and, Figure 6 is a detailed view of the region of the expansion joint between adjacent panels shown in Figure In Figures 1 and 2, there is shown a panel 10 for a refractory wall.

The panel 10 comprises a plate 12.

The plate 12 has a plurality of anchor memberF 14 extending from one face thereof.

Preferably, the plate 12 and anchor members 14 are 10 comprised of steel, with the ancho,r members 14 being of stainless steel.

The anchor members 14 may be welded to the plate 12.

The panel 10 also comprises a layer of refractory castable material 16.

The anchor members 14 are embedded in the layer of refractory castable material 16, as can be best seen in Figure 2.

Preferably, the layer of refractory castable material 16 comprises a Geme-ntaeaeus material.

20 The panel 10 further comprises a layer of heat insulating material 18 located adjacent the face of the plate 12 having the anchor members 14 extending therefrom. The layer of heat insulating material 18 is sandwiched between the plate 12 and the layer of refractory castable material 16, which is held by the anchor members 14.

The layer of heat insulating material 18 may, for example, be ceramic fibre and/or insulating monolithic.

At a pair of opposed edges of the panel 10, the plate 12 extends beyond the edges of the layer of refractory ~slr..wr~n~ars~ l -r l ~smrsllP~ castable material 16 and the layer of heat insulating material 18 to form extended portions 20 of the panel The panel 10 may be substantially rectangular with the extended portions 20 formed on the two opposed edges of lesser dimension.

The panel 10 may be made by first laying the plate 12 horizontally with the anchor members 14 extending upright and then placing a mould frame around the edges of the plate 12 such that it sits on the portions of the plate 12 10 that form the extended portions 20 of the plate 12 and adjacent the edges formed without the extended portions A layer of insulaLing material 18 is then placed adjacent the face of the plate 12 and a layer of refractory castable material 16 is placed over the layer of insulating material 16. The layer of refractory castable material 16 is allowed to set and then the mould frame may removed from around the completed panel The completed panel 10 is of the form shown in Figures 1 and 2 having extended portions 20 formed by the plate 12.

20 These extended portions 20 are formed since the mould frame o prevents the material layers 16 and 18 covering these portions of the plate 12.

The panels 10 may be used to form an outer refractory wall on the exterior of a large scale heating or heat transfer apparatus as shown in Figure 3.

In an alternative embodiment, the panel 10 may be made without the extended portions A panel of this alternative embodiment may be formed by placing a mould frame around the edges of the p- te 12 and .asnsrnaearnaaamr.~narsrsrr~lsclEBa~~ 1 6 2 then placing the material layers 18 and 16 over the plate 3 12. Additionally, the plate 12 of the alternative 4 embodiment panel is of a shorter length by the amount of the two extended portions 20 of the panel 6 Thus, the panel of the alternative embodiment 1s of the same 7 form as the panel 10 shown in Figures 1 and 2, except that 8 the extended portions 20 are omitted therefrom.

9 The heating or heat transfer apparatus is provided with a support framework which compris- beam members 22 at spaced 11 intervals, which may be disposed horizontally.

12 The panels 10 are connected to the support framework between 13 successive pairs of beam members 22.

14 The panels 10 are arranged in a side by side one row above another arrangement, as shown in Figures 3 to 6.

I. 16 The panels 10 arc connected to pairs of beam members 22 by 17 way c the extended portions 20 at opposed ends of the 18 panels 10 as is best seen in Figures 3 and 4. This may be 19 done by welding the extended portions 20 to the beam members 22.

21 As shown in Figure 4, the upper extended portion 20b of the 22 pail.l lOb and the lower extended portion 20a of the panel 23 10a are connected to a beam member 22. The lower edges of 24 the layers of refractory castable material 16 and heat insulating material 18 sit on the beam members 22, as best 26 seen in Figure 4.

27 A sealing monolithic material 24 is placed in the region of 28 the beam members 22 between adjacent panels 10 to act as a 29 heat insulating medium.

0 The panels 10 are connected \o the beam members 22 such .1 1 7 2 that an expansion joint is formed between the edges 28 of 3 adjoining panels 10 which are not provided with extended 4 portions 20. These edges 28 are shown in Figure 6 and also in Figures 1 and 3. The expansion joints are filled with a 6 heat insulating material, e.g. compressed fibre. The 7 expansion joints filled with heat insulating material 26 are 8 best seen in Figures 5 and 6.

9 Sealing strips 30 are connected over the edges of the plates 12 of adjacent panels 10 to reduce heat transfer through 11 open joints between edges of adjacent panels 12 Preferably, the sealing strips 30 are steel and are welded 13 to the plates 12 of adjacent panels 14 Figure 5 also shows how the panels 10 of the present invention can accommodate an existing tile, brick or 16 monolithic refractory wall 32. As shown, a rebate 34 can be 17 formed in the layer of refractory castable material 18 of 18 selected panels 10 to accommodate the existing tile, brick 19 or monolithic refractory will 32.

20 The panel 10d, along with any panels 10 above or below the 21 panel 10d for the height of the existing refractory wall 3?, S: 22 are provided with a *ebate 34. The rebate 34 accommodates 23 the existing refractory wall 32, as can be seen in Figure 24 An existing refractory wall 32 is typically made of tiles, bricks or monolithic material and Is free standing.

26 Panels of the alternative embodiment, as hereinbefore 27 described, may be connected to Fpirs of beam members 22 by 28 connection strips (nut shown). These connection strips are 29 connected to the opposed ends of the plate 12 (of the panel of the alternative embodiment) that are adjacent the 7a 2 respective pair of beam members 22. These connection strips 3 are then connected to the beam members 22. This may 4 6 7 8 9 11 12 13 14 16 18 19 21 23 1924 26 27 28 aa~lna~lAllll~a~l~ 8 0*0 0 00 0 00 00 0 0 9 be dcne by welding.

Alternatively, a series of panels of the alternative embodiment may be connected to pairs of beam members with an elongate connection strip. This avoids the need to have to attach individual connection strips to each panel.

Individual elongate connectionXa-&ps may be attached to a series of panels and these panels are then connected to the beam members 22 via the elongate connection strips.

These connection strips/used with the panel of the 10 alternative embodiment are thus functionally equivalent to the extended porticns 20 of the panel 10 shown in Figures 1 and 2.

A refractory wall made with panels of the alternative embodiment is otherwide the same as the refractory wall 15 made from the panels 10 as hereinbefore described.

Modifications and variations such as would be apparent to a skilled addressee are deemed v'thin the scope of the present invention.

Claims

1. A panel according to any one of Claims 1 to 3, wherein 16 said refractory castable material comprises a cementitious 17 material. 18 5. A panel according to any one of Claims 1 to 4, wherein 19 said heat insulating material comprises ceramic fibre and/or S 20 insulating monolithic material. 21 6. A panel according to any one of Claims 1 to 5, wherein 22 extended portions extend from said plate means beyond the 23 edges of said layer of material comprising h-at insulating 24 material and said layer of material comprising refractory S 25 castable material on at least a pair of opposed ends of said 26 panel. 27 7 A panel according to Claim 6, wherein said extended 28 portions are formed integral with said plate means. 29 8. A panel according to Claim 6 or 7, wherein said extended portions are attached to said plate means. -t i j_ ~asD~e~e~Z~b~s_ 10

9. A panel according to any one of Claims 6 to 8, wherein, said panel is substantially rectangular and said extended portions are located on the opposed ends of lesser dimension of said panel. A panel according to any one of Claims 1 to 9, wherein said plate means is made of steel.

11. A panel according to any one of Claims 2 to 10, wherein said anchor means J made of steel.

12. An outer refractory wall for the exterior of a large scale heating or heat transfer apparatus comprising a plurality of panels connected to existing support framework of said heating or heat transfer apparatus, each of said panels comprising a panel for a refractory wall comprising plate means, a Layer of material comprising heat insulating material and a layer of material comprising refractory castable material, said layer of material comprising heat insulating material being intermediate said platu weans and said layer of material comprising refractory castable material.

13. An outer refractory wall according to Claim 12, wherein said panels are provided in a side by side one row above another arrangement and first sealing means is provided to seal open joints between edges of substantially adjacent panels.

14. An outer refractory wall according to Claim 13, wherein said first sealing means comprises sealing strips that are connected to said adjacent panels.

15. An outer refractory wall according to Claim 14, wherein said sealing strips extend longitudinally to seal said open tt t tt r "i It tt t tt 1. I I it r I" r e. Y 11 r r 4i 0 f 2 3 4 6 7 8 9 11 12 13 14 16 17 18 S 19 21 22 23 S 24 26 27 28 29 t j|30 joints.

16. An outer refractory wall according to any one of Claims 12 to 15, wherein second sealing means is provided in substantially the region where said panels are connected to said support framework.

17. An outer refractory wall according to Claim 16, wherein said secona sealing means comprises a sealing monolithic material.

18. An outer refractory wall according to any one of Claims 12 to 17, wherein said panels are connected to said existing support framework by connection means.

19. An outer refractory wall according to Claim 18, wherein said connection means comprises elongate connection strips which are connected to at least a pair of opposed ends of said plate means of at least two adjacent panels.

20. An outer refractory wall accordina to Claim 18, wherein said connection means comprises connection strips which are connected to said plate means of a respective said panel to form extended portions thereof to extend from at least a pair of opposed ends of said panel.

21. An outer refractory wall according to Claim 18, wherein said connection means comprises extended portions which extend from at least a pair of opposed ends of said plate means.

22. An outer refractory wall according to any one of Claims 12 to 21, wherein expansion joints are formed between selected edges of adjacent panels and heat insulating means is provided in said expansion joints.

23. An outer refractory wall according to Claim 22, wherein 12 said heat insulating means comprises compressed fibre and/or insulating monolithic material.

24. An outer refractory wall according to any one of Claims 12 to 23, wherein said panel is as defined in any one of Claims 2 to 11. A method of installation of an outer refractory wall on the exterior of a large scale heating or heat transfer apparatus comprising connecting a plurality of panels co existing support framework of said heating or heat transfer apparatus, each of said panels comprising a panel for a refractory wall comprising plate means, a layer of material comprising heat insulating material and a layer of materiel comprising refractcry castable material, said layer of material comprising heat insulating material being intermediate said plate means and said layer of material comprising refractory castable material.

26. A method according to Claim 25, further comprising arranging said panels in a side by side one row above another arrangement and providing first sealing means to seal open joints between edges of adjacent panels.

27. A method according to Claim 26, wherein said first sealing means comprises sealing strips, and connecting said sealing strips to said adjacent panels.

28. A method according to Claim 27, further comprising providing said sealing strips to extend longitudinally to seal said open joints.

29. A method according to any one of Claims 25 to 28, further comprising placing second sealing means in substantially the region where said panels are connected to .4 S S I S4 S. SI I'l T 3 i-QIIII~I~ 1 13 2 said support framework. 3 30. A method according to any one of Claims 25 to 29, 4 further comprising connecting said panels to said support framework via connection means. 6 31. A method according to Claim 30, wherein said connection 7 means comprises elongate connection strips, and connecting 8 said elongate connection strips to at least a pair of 9 opposed ends of said plate means of at least two adjacent panels. 11 32. A method according to Claim 30, wherein said connection 12 means comprises connection strips, and connecting said 13 connection strips to said plate means of a respective said 14 panel to form extended portions thereof to extend from at 15 least a pair of opposed ends of said panel. 16 33. A method accord ng to Claim 30, wherein said connection 17 means comprises extended portions which extend from at least 18 a pair of opposed ends of said plate means. 19 34. A method according to any one of Claims 25 to 33, further comprising placing heat insulating means in 21 expansion joints formed between selected edges of adjacent I. 22 panels. 23 35. A method according to any one of Claims 25 to 34, 24 wherein said panel is as defined in any one of Claims 1 to 11. 26 36. 3 panel for a refractory wall substantially as 27 herei,nbefore described with reference to the accompanying 28 drawings. 2 1 17. An outer refractory wall for the exterior of a large j 0 scale heating or heat transfer apparatus substantially as I I I L 1 2 3 4 6 7 8 9 11 12 13 14 S 16 S17 18 S 19 S 21 22 23 24 26 27 28 29 *y r 14 hereinbefore described with reference to the accompanying drawings.

38. A method of installation of an outer refractory wall on the exterior of a large scale heating or heat transfer apparatus substantially as hereinbefore described with reference to the accompanying drawings. DATED OCTOBER 20 1992 REFRACTORY NOMINEES PTY LTD (ACN NO. 008 835 989) By their Patent Attorneys KELVIN LORD AND COMPANY PERTH, WESTERN AUSTRALIA. J r *7n;ur~-