Патент USA US2408729код для вставки
Oc't. s, 1945; A. BOWLAND HoT-??LAsT STOVE Filed Aug. 3, 1942 2 Sheet's-'Sheet 1 INVENTOR: ' ?/VDEEW ÖOWLÂ/VD, BY: H?S ATTORNE . Oct. 8, 1946. _ A. BOWLAND 2,408,728 HOT-BLAST STOVE 'Filed Aug. 3, 1942 2 Sheets-Sh?et 2 F?E- 2 . INVENTOR I ;Jy/Eylem Baz/mmm, &408328 Patented Oct. 8, 1946 2,408328 4'-HOT-'BLAST 7 5 ;AndrewBowla??dg-Mount Lebano??vgPagassignorto ._ „W?ll?am M. Baileyrcompany,yarco?äporation of ?lApplicationAugust 3, 1942,i-SeriaLNo;‹4532353 ` i 3 Claíms. (01163419) 'This inventionv-relates ;to hot-_blast-?stoves, 'of i idomes- 2~and?=s~ -by this' shell 'I . "I'hermal 'eXpan ision šspace?is-provid?d;between the outside?of the ;lining 'I ?Land the inside' ofíthe shell-1 ,?andithere «ist room;*insidetheidome *2' for 'all the »brickwork `thetic rubber?industry with a stove?of this 'type to thërmally jexpand without moving›` »this deme. ?capable of Operating_ at the high; temperatures 5 Bothíthesteel domes =2:,and<6 support'brick :linings .required by this industry,~which _are considerably 134 andi 1 .4;: respectively, “these ?linings: Testing› on higher than ;the `safe ,Operating limits of prior -inwardly? extending ??anges? of the' cylindrical dome ;the type used toheatthe blast _of ?an iron?blast -furnace, the object /beingto ,provide the syn .art blast-furnace ?hot-blast stoves. :Ingaddition «sid?s r 3 `and 5,; respec'tively, -' and thermal -expan to Kits special ?eld, a stove embodying the ;inven :sion' spaces :being provided_ between the sout'sides 10 .tioncan be used whereveritstype is required. of the :brick linings" .and :the '?insides 'of :the -'- two ~' ?A speci?c example?of ~a hot-blast stove con steel sdomes. The ~~interconnecting ;steel 'du'cts 4 -structed-according› to ?the ;principles of this' in rare'vprovided 'with t?at-šbottonis, :straight *vertical ?ventiomis 'illustrated by the accompanyíng ,draw sides :and rarched Proofs; this* permittingthem ::to ings, the various ?gures being as follows: , 15 'be lined 'with ?standard "size'd ,bricks "formin'g »Figure-lgisa vertical section'ofthe stove; Figure?z isa horizontal cross-section ;from the .line II-IIin Big-,ure 1pn~an~en1arged scale; and -Figure :3 is ;ai vertical :cross-.section ' from the line› III-'III ' inø lí'igure 1 on › a,›.sti1l:further=„en -larged scale; _ . ~More speci?cally, :these ,drawings show. a 'verti cal ?substantiallyvcylindrical _steelshell I support ing a› steel dome--Z oníits top, _this „dome ,12 %having v a vcylindrical.?stee1°;side_:3 from rwhichrtwo verti cally elongatedxlaterally'spaced steel?ducts 4?'ex tend substantiallyv horizontally :With: their `en'ds converging andconnecting fwith .the cylindrical ;side-5 -of ;aásmaller` secondsteel .dome 6 sothat 'this second deme íis i supported :by the :?rst "dome :2 :which is, in turn, 'supportedby?thestéel shell I, vthe?atter, of_?course,vrestingson-the?ground. :The 'ducts ?4 'function vertically.,as?cantilevers _carrying the weight of the dome 6, and functionä'laterally aswstruts.providingíilateral rigidity. i The ducts 4 provide greater rigidity as cantilevers by reason of being made .with Vertically elongated cross sections. This second dome 6 connects through ~ a thermal expansion connection "I with a second Vertical substantially cylindrical steel shell 8 hav 'arched-?-topped: ducts r 1:5 which i constitute :brick linings ifor :the rstee'l ductsr'4, these, brick ilinin'gs .or durcts? l??ib'eing' "bu?tëintoiihe liníngs“ l 3 and3`1I4 so they are also supported by „the domeiiside “?'anges, *and :having expansion "spaces between ítheir'outsides andi-,he insides of the 'steeiducts'at their ähottoms, :sides and tops. - "The-;second 'steel?domere andíits brick lining !4 *are much smaller! 'than 'thetzste'etdome'?z and -its jbrick'ilinir?g '513, "the second `steel :shell ~8 being ?likewiseaconsiderably smaller than :the steel shell Il 'and ;containinga brick. lining 16 the weight of which-is? carrie'd'?byrthe support: 9 and which has -its :outside 'spaced ,from'the iinside “of the steel r'shellssa ?toprovide atherm'arexpansion space. .The brick ilining 116 -ofíthis .second cylinderše 'is provided with a burner-.connection '-`|`1 andmcor? stitutes the stove's combustion chamber.“^'Thus, ;the íst'ovei is ?sof?'thesexternai combustionëchamber štype,atheäcdmbustion-ichamber lbei'ng entirely?out' side of .the checkerwork ?n and the lining i l, and V laterally spaced therefrom as an independent unit. i v v In operation, a burner is connected at the con nection !1, and combustion ovccurs inside the lin ing its own supporting means› in the form of a 40 ing !6 in the manner necessary to produce the platform 9 on which its bottom rests. high temperatures required by the'synthetic rub The above Construction involves the advantage ber industry. This introduces no complications that thermal expansion vertically is balanced throughout the structure, the two domes 2 and 6 mOV?ng Vertically as a unit when the shell I moves vertically, the shell 8 being unaffected by this because the vertical combustion chamber brick' lining !E can thermally expand without affecting any of the other stove parts, this likewise being true of the combustion chamber steel shell 8. This isimportant because these 'are the hottest parts of the stove. The top of the Vertical brick 50 lining !6 telescopes inside the bottom of the brick lining !4 of the deme side 5, to an extent su?l movement since it is working through the expan sion connection 1, this also “meaning that the shell 8 is free to move vertically independently of the shell l and the two domes. Inside the shell I is the stove's vertical brick cient for safety purposes, there being no `connec- i checkerwork ?o with its laterally enclosing ver tion between the two, however. tical brick lining I I, all this brickwork being car The combustion products exhaust into the brick ried by the stove bottom ?z independently of the ?ining I 4 of the steel dome E and travel from there shell l and being relieved of the weight of the 55 3 2,4os,728 4 through the brick linings !5 of the ducts 4 so as to having a sheet metal housing spaced from the introduce parallel horizontal ?ows of combustion outer wall thereof, a, combustion chamber spaced products into the brick lining !3 of the steel dome from said checker tile structure having an in 2› at positions spaced circumferentially of the side sulating Wall and a sheet metal lining spaced from of this lining, the e?ect being a distributed hori CI the outer wall thereof, domes mounted on the re zontal introduction of the combustion products spective checkerwork and combustion chamber v into the checkerwork dome so as to avoid local damage, particularly, to the top of the checker work. To enhance this protection, the top of the structures having communicating ducts laterally spaced to deliver the products of combustion from the combustion chamber over substantially checkerwork is positioned well below the level of 10 the entire area above the Checker tile, said ducts the ducts, this, in conjunction with the vertical being of a greater horizontal cross-sectional area cylindrical sides of the checkerwork dome,Apro-› ' viding a large expansion space for the combus- „ tion products. The combustion products then travel evenly down through the checkerwork m `than the dome above the combustion chamber, said domes and ducts having a sheet metal outer housing connected to the housing of the com bustionchamber by a thermal expansion joint whereby the duct connected domes are vertically and out through the bottom of the stove. During the necessary cyclic operation, the teme movable as a. unit in response to thermal expan sion of the checkerwork wall. tremes, but this does not upset the balanced con 2. In a hot blast stove comprising a checker struction of the stove. Thus, the checkerwork ID 20 work unit and a, combustion unit communicating perature of the checkerwork varies between ex and the brick lin?'ng H may thermally expand without affecting the steel shell I, and the latter can likewise thermally expand, it carrying both the domes 2 and 5 which can move independently of the steel combustion chamber steel shell 8, by l reason of the thermal expansion connection 1. to deliver the products of combustion to the top of „the checkerwork unit, oía plurality of domes mounted on top of said units joined by laterally spaced ducts of greater horizontal cross-sectional area than the dome above the combustion unit, 'said ducts being spaced to distribute the prod This independence is important because of the ucts of combustion substantially uniformly over temperature differentials, such as those existing the entire area of the checkerwork in the cham between the combustion chamber and checker ber formed by the checkerwork unit dome, the work, for instance. As in the case of the lining 30 combustion unit dome having thermal expansion |6 in the combustion chamber, the lining l l eX connection with the wall of the combustion unit tends upwardly into safe telescoping relationship and said checkerwork and combustion unit domes inside the depending lining of the checkerwork and communicating ducts having sheet metal dome, the two parts being entirely free for rela housings_ tive movement. In no instance is any of the 3. In a, hot blast stove a checkerwork unit and brickwork required to support anything other than its own weight, and there is no instance where the thermal expansion of the brickwork is a combustion unit having domes forming cham bers at the top thereof communicating through a plurality of laterally spaced ducts, the longi restrained in any manner. It is because of these constructional details 40 tudinal cross-sectional area of which is greater than the dome above the combustion unit and which permit the stove to operate as a balanced being spaced to distribute the products of com Construction with all of its parts free to thermally expand to the varying extents resulting from their varying temperatures, that the stove can operate safely at the hightemperatures required by the synthetic rubber industry. Before closing, attention is called to Patent No. 2,257,453 showing a stove shell and thermal insulation particularly adapted for incorporation in the present inven tion, this not being illustrated by the drawings in the present instance, to avoid confusion with the fundamentals here involved. I claim: 1. In a hot blast stove comprising an insulating bustion substantially uniformly over the entire area at the top of the checkerwork, said checker work, combustion unit and domes having refrac tory linings and sheet metal housings interacting to be independently movable responsive to ther ma1 expansion, the dome and duct structures con stituting a monolithic wall with the duct walls 50 functioning vertically as cantilevers carrying the weight of the combustion unit dome to adapt the dome units for thermal movement independently of the checkerwork and combustion unit walls and wall having checker tile mounted therein and 55 housings. i ` ANDREW BOWLAND.