AU8953282A

AU8953282A - Rod-anchored, accordian-fold, full-lining module

Info

Publication number: AU8953282A
Application number: AU89532/82A
Authority: AU
Inventors: Alan C. Ferguson; Melvyn L. Gordon; Roger C. Oxford
Original assignee: Thermal Ceram Inc; Thermal Ceramics Inc
Current assignee: Thermal Ceramics Inc
Priority date: 1981-10-16
Filing date: 1982-09-02
Publication date: 1983-05-05
Anticipated expiration: 2002-09-02
Also published as: PH24054A; ES516527A0; WO1983001475A1; JPH0239200Y2; JPS58501593A; ES8403605A1; EP0077608B1; IN162731B; MX161643A; ZA826725B; CA1210239A; DE3274678D1; AU557614B2; EP0077608A1; BR8207875A; AR230514A1; JPS6163696U

Description

ROD-ANCHORED, ACCORDION-FOLD, FULL-LININGMODULE

BACKGROUD OF THE INVENTION

The present invention relates to a rod-anchored, accordion foid modular refractory fiber blanket for lining a furnace or like equipment.

Several ceramic fiber modular designs for furnace linings presently exist. Many modules consist of individual strips of refractory fiber blanket stacked edgewise and either cemented to an expanded metal substrate by means of ceramic cement or mortar, or held together by retainer members having a base portion running the length of the individual strips, as exemplified in Sauder, et al U.S. Patent No. 3,940,244 and Balaz, et al U.S. Patent No. 3,832,815. Other known modular designs are composed of a compressed continuous strip of pleated insulating blanket with two of the outer pleats (cold face pleats) mechanically supported by its metal frame. The supports run substantially the length of the fold or pleat. The module's metal frame allows it to successively attach to the adjacent modules. Once attached, the modules are mounted to the furnace walls using studs or fastening clips affixed to the walls as exemplified by U.S. Patent Nos. 4,001,996 (Byrd) and 4,103,469 (Byrd).

However, problems still exist with certain types of insulation modules. Ceramic fiber blankets and, therefore, the modules made thereof are not mechanically strong and must be handled with great care to avoid tearing. Ceramic fiber blanket material is known to shrink when exposed to temperatures in excess of 2000°F. Known modules utilizing blanket of such material for lining of furnaces have encountered difficulties caused by said shrinkage of the material. Shrinkage has caused separations between folds within a module and between modules themselves, thereby exposing the furnace shell and critical retainer members to the heat of the interior of the furnace. Shrinkage has also caused the pleats of a folded blanket configuration to unfold and hence sag since not all cold faced pleats were supported.

SUMMARY

The present invention is an improved refractory fiber blanket module used to line furnace walls and ceilings. ϊt is comprised of a support bracket having a base portion and a bracket mounting member and a protected blanket retaining member at each end thereof. An insulating blanket is folded into a plurality of inner and outer foids which occur at the hot and cold face of the module respectively. The plurality of outer folds of the blanket is positioned between the retaining members of the support brackets. A pleat support rod extends through the outer plurality of folds of the insulating blanket. Each end of the pleat s:upport rod is attached to a retaining member. Hence, each outer pleat is mechanically held in place by means of the pleat support rod orientated parallel to the cold face of the module. The bracketed module is then attached to the furnae wall or ceiling having threaded studs and other fastening devices. The mounting members cf the bracket can either have slotted ends or holes to be used in conjunction with the threaded studs.

It is an object of this invention to produce a new and improved insulating block module for lining a funace.

It is a further object of this invention to provide an insulating block module wherein the module blanket is under compression before and after installation.

It is a final object to provide an insulating module which resists uravelling and/or lamination of the layers of insulating blanket. BRIEF DSESCRIPTION OF THE DRAWINGS

Figure 1 is an isometric view of a module embodying features αf this invention.

Figure 2 is a isometric view of an alternative module of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to the drawings, illustrated is a rod-anchored, accordion-fold, full-lining module to be used for insulating a furnace or other high temperature equipment. The insulating module 10 is preformed from a folded or pleated insulating blanket 12 and a support bracket 20. Folds or pleats 14 and 16 exist at both the hot and cold faces of the module. The support bracket 20 has a base 22 and a protected upturned retaining member 24 and a mounting member 26 at each end thereof. A pleat support rod 30 extends between the retaining member 24 of each support bracket 20. The rod 30 is threaded perpendicularly through each cold face pleat 16 and is located near the outer or cooler face of the module 10.

The cold face of module 10 is defined as that surface of the module which comes into contact with the furnace wall. The hot face is defined as that surface of the module which is exposed to the interior of the furnace. Therefore, the module 10 has both hot face or inner pleats 14 and cold face or outer pleats 16. The pleat support rod 30 not only holds the ceramic fiber blanket 12 In compression, but also serves to retain each pleat 16 within the module 10. Each end of the pleat support rod 30 is attached to a support bracket retaining member 24. The retaining member 24 is situated between the outer fold and end flap of the module, thereby protecting member 24 from the detrimental effects of the furnace environment. Any conventional means of attachment can be used. However, typically an end-threaded rod will be used so that a nut at each end of the rod 30 will keep the rod secured to the support bracket 20.

The folded ceramic fiber Insulating blanket 12 is formed from a suitable corrmercial ly available ceramic fiber sheet such as the type known under the trademark KACWOOL sold by The Babcock & Wilcox Company. It should be understood that the particular type of insulating blanket used is selected based on the range of temperatures in the high temperature equipment in which the apparatus Is to be installed.

The folded blanket 12 is compressed prior to being placed within the support members 24 of support bracket 20. This compression is calculated to compensate for thermal shrinkage of the blanket material that occurs during use of the module. Banding material (not shown) is then placed around the module 10 at or aear the two ends so that the banding material is in parallel relationship to the support rod 30. The banding material insures that the folds and end flaps of the modules remain substantially square and compressed during package, shipping, and placement. Once installation ox the furnace wall or ceiling is complete, the banding material is removed.

The modular block fiber lining is typically installed in parquet fashion such that adjacent modules are turned 90° before installation. The present modular design represents a full furnace lining and as such can be used alone. If desired, a safety iiner layer of wallpaper insulation blanket can be used behind the module as further protection for the furnace shell.

While in accordance with the provisions of the status there is illustrated and described herein a specific embodiment of the invention and those skilled in the art will understand that charges may be made in the form of the invention covered by the claims, and that certain features of the invention may sometimes be used to advantage without corresponding use of other features.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

Claims

IN THE CLAIMS

1. An insulating module for lining a furnace and like equipment comprising: a) a support bracket having a base portioα and a bracket mounting member and a protected bracket retaining member at each end thereof,

b) an insulating blanket folded into a plurality of inner and outer folds, said plurality of outer folds positioned between the retaining members of the support bracket, and

c) a fold support τoά extending through the outer plurality of folds of the insulating blanket and attached to each of the bracket retaining members.

2) The insulating module according τo Claim 1 wherein the bracket mounting members are end-slotted.

3) The insulating module according to Claim 1 wherein each bracket mounting member has at least one hole therein.

4) The insulating module according to Claim 2 or 3 wherein the, bracket mounting member is sized to accept threaded studs mounted to the furnace.

5) The insulating module according to Claim 1 wherein the plurality of outer folds is compressed within the two retaining members.

6) A furnace lining comprising:

a) a module component having a support bracket having a base portion and a bracket mounting member and a protected bracket retaining member at each end thereof, and insulating blanket folded into a plurality of inner and outer folds, said plurality of outer folds positioned between the retaining members of the support bracket and a fold support rod extending through the outer plurality of folds and attached to each protected bracket retaining member, and

b) an attachment means securing each mounting member of the module component to the furnace, adjacent modules being mounted such that said plurality of inner folds of one module is in compressive contact with the plurality of inner folds of each adjacent module.

7) The furnace lining according to Claim 6 further comprising a safety liner backup blanket mounted to the furnace behind each modular component.

8) The furnace lining according to Claim 6 wherein each modular component is mounted at a 90° rotation with respect to adjacent modules.