CA1085816A - Regenerative heater - Google Patents
Regenerative heaterInfo
- Publication number
- CA1085816A CA1085816A CA287,941A CA287941A CA1085816A CA 1085816 A CA1085816 A CA 1085816A CA 287941 A CA287941 A CA 287941A CA 1085816 A CA1085816 A CA 1085816A
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- CA
- Canada
- Prior art keywords
- sections
- course
- section
- brickwork
- transition
- 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.)
- Expired
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Regenerative Heater Abstract of the Disclosure The regenerative heater comprises a brickwork of the walls and checker of refractory materials with different coefficients of linear expansion enclosed within a jacket and composed of superimposed horizontal sections corresponding to the distribu-tion of the internal operating temperature. Each of the hori-zontal sections consists of a homogeneous refractory material.
Arranged between the horizontal sections are transition sections, each consisting of the refractory materials of the contiguous sections, the materials being uniformly distributed in each course and superimposed so that the content of the material in one of the contiguous section gradually diminishes from course to course toward the other section.
Arranged between the horizontal sections are transition sections, each consisting of the refractory materials of the contiguous sections, the materials being uniformly distributed in each course and superimposed so that the content of the material in one of the contiguous section gradually diminishes from course to course toward the other section.
Description
~31 35gil~6 The presen~ inve~tion re~ates to heater~ and in particular, to regenerative heaters.
The present inven-tion can also be utilized in heat exchan-gers in which gases are conducted through the open brickwork of regenexa~iv~ chamber~, permitting the brickworL~ to heat, then another gas is passed through the brickwork to raise the gas temperature due to contact with the heated bricks.
The present in~ention is of particular advantage in case of ironmaking ~or heating the b~ast, therefore it wil~ b0 des-cribed i~ terms o~ this speci~ic embodime~t~ however it is not intended that the inve~tion be limited to the disclosed embodi-me~tO
'l'he heaters under the term of high-temperature hot air stove~ for blast furnaces are wel~ known in ironmaking. ~hese -heaters oomprise , a wall and checker brickwork of refractor~
materia~s having different coe~ficients of linear expansion, said wall and checker bric~work being encaæed within a jacket and comprising superimposed horizontal sections corresponding to the distribution of i~ternal operating temperature of the rege~er~ti~e heater, each of the sections consisting of a homo-geneous refractor~ materia~
~ he checkers of commonly used regenerative heaters are made of bricks in such a way that vertical channels are formed ~hroughout the e~tire height o~ the checkers.
The c~cle o~ blast heating in the regenera-tl~a heaters con-sists of two stages. During the first staga a mixture of gas `~
. ~ .. .
. . ,.. , , ~., .
. .
. ., , :, . . ~, .
.
~ s~
with air ~s burn-t ~nd the hot combus-~ion pro~uc-ts are conducted through the checkers chamber, thus heating the brickwork up to a high temperature. During the.second stage air, with the pur-pose of being heated to the required temperature~ is passed through the heated checker brickwork.
In conventionaL regenerative heat~rs the temperature under the dome reaches 1600C~ and tempera~ure gradient in hot blast heati~g is of the order o~ 150C in the upper zones and of the order of 300C in the lower zonesO In accordance with the dis-tribution of the i~ternal operating temperature by zones, thebrickwork of the walls and checker in con~entional heaters is made of ~arious refractories, such as dinas brick, high-alumina and fireclay materialsO ~hus9 in the high-temperature zone the brickwork is made of hard-burnt high-strength dinas brick, whereas in the lower ~onss, of a relatively low temperature kaolin, high-alumina and fireclay re~ractories are used. Thus, in each temperature zone characterized by a certain temperature r~n~e th~ horizontal section is laid from a refractory best suitable by its strength characteristics for the operating con-ditions of the given zon~.
In heating~ the contiguous areas of the horizontal sections develop relative radial shifts of the brickwork due to the diffe-rence in the coe~icients o~ linear expansion of the re~racto-ries. ~or e~a~ple~ ~or dinas brick the coe~ficient of linear --expa~sion is on the a~erage 12-10-S 1/deg9 while for kaolin ref-ractories it is 6 10 6 1/deg. In heating to 1000C of brickwork .
of radius 500 cm -this results in a relati~e shift of the con~igu-ous horizontal sections ~ R = ~1~R ~ 2~R' - coefficient o~ linear expansion of dinas brick
The present inven-tion can also be utilized in heat exchan-gers in which gases are conducted through the open brickwork of regenexa~iv~ chamber~, permitting the brickworL~ to heat, then another gas is passed through the brickwork to raise the gas temperature due to contact with the heated bricks.
The present in~ention is of particular advantage in case of ironmaking ~or heating the b~ast, therefore it wil~ b0 des-cribed i~ terms o~ this speci~ic embodime~t~ however it is not intended that the inve~tion be limited to the disclosed embodi-me~tO
'l'he heaters under the term of high-temperature hot air stove~ for blast furnaces are wel~ known in ironmaking. ~hese -heaters oomprise , a wall and checker brickwork of refractor~
materia~s having different coe~ficients of linear expansion, said wall and checker bric~work being encaæed within a jacket and comprising superimposed horizontal sections corresponding to the distribution of i~ternal operating temperature of the rege~er~ti~e heater, each of the sections consisting of a homo-geneous refractor~ materia~
~ he checkers of commonly used regenerative heaters are made of bricks in such a way that vertical channels are formed ~hroughout the e~tire height o~ the checkers.
The c~cle o~ blast heating in the regenera-tl~a heaters con-sists of two stages. During the first staga a mixture of gas `~
. ~ .. .
. . ,.. , , ~., .
. .
. ., , :, . . ~, .
.
~ s~
with air ~s burn-t ~nd the hot combus-~ion pro~uc-ts are conducted through the checkers chamber, thus heating the brickwork up to a high temperature. During the.second stage air, with the pur-pose of being heated to the required temperature~ is passed through the heated checker brickwork.
In conventionaL regenerative heat~rs the temperature under the dome reaches 1600C~ and tempera~ure gradient in hot blast heati~g is of the order o~ 150C in the upper zones and of the order of 300C in the lower zonesO In accordance with the dis-tribution of the i~ternal operating temperature by zones, thebrickwork of the walls and checker in con~entional heaters is made of ~arious refractories, such as dinas brick, high-alumina and fireclay materialsO ~hus9 in the high-temperature zone the brickwork is made of hard-burnt high-strength dinas brick, whereas in the lower ~onss, of a relatively low temperature kaolin, high-alumina and fireclay re~ractories are used. Thus, in each temperature zone characterized by a certain temperature r~n~e th~ horizontal section is laid from a refractory best suitable by its strength characteristics for the operating con-ditions of the given zon~.
In heating~ the contiguous areas of the horizontal sections develop relative radial shifts of the brickwork due to the diffe-rence in the coe~icients o~ linear expansion of the re~racto-ries. ~or e~a~ple~ ~or dinas brick the coe~ficient of linear --expa~sion is on the a~erage 12-10-S 1/deg9 while for kaolin ref-ractories it is 6 10 6 1/deg. In heating to 1000C of brickwork .
of radius 500 cm -this results in a relati~e shift of the con~igu-ous horizontal sections ~ R = ~1~R ~ 2~R' - coefficient o~ linear expansion of dinas brick
2 = coefficient of linear expansion ofkaolin refractories T ~ temperature in the area of conjugation of horizontal sections R = average brickwork radius, which makes 20-30 mm on the radius.
As a result o~ such shift the peripheral flues of 40 mm dia-meter in the checker brickwork in the p~ane of conj~gation of the horizo~-tal sections will be overlapped up to 50-75~, and on the average in the brickwork section by 30-40%, which wi~l cause a respective loss of efficiency of the regenerative heater,hence~
of the blast furnace.
The relativo shift of the brickwork in the areas of conjuga-tion of the horizontal sections increases in direct proportion to the increas0 in the brickwork diameter and haating tempera-~ure.
~ he contemporary s-tage o~ blast furnace co~struction is characterized b~ a substantia~ increase in the volume of blast fu~naces ~up to 5000 m~) and hot blast temperature above 1400C~
Respecti~el~9 the dimensions of heaters rise up to 14 m in dia-meter, 50 m in height, while dome heating increases to 1600C.
All this entails the need to employ fox them néw materials, possessi~g higher re~ractoriness, who~e coefficien-t of linear ~:
axpansion signi~icantly di~fers ~rom that of commonly used xef- ;
ractor~ material~. ~hus, the danger o~ reduction in the effici-~ L!-- .. ~; ~ . ...
:, :, :
. . . . .
.
.
ency o~ modern l~r~e heater~ for the above rcason~ ~rows consi-derablyO
The principal object of the pxesent in~ention is to provi de a regenerative heater with such an arrangeme~t of the brick-work of the walls and checkers that would substantial~y reduce radial shi~t~ between conjugated horizonta~ sections.
A~other object of the inventio~ is to pro~ide a regenerati-ve heater with substantially constant clea~ opening of the ver-tical gas flues.
Still anothcr object o* the invention is to provide a rege-nerative heater with increased supporting power o~ the brick-work o~ the walls and checkers.
A ~urther object of the invention is to provide a regenera-tive,heater with uniform distribution of tensi~e and compres-sion strains ~aused by alternate heating and coolingO
~ hese and other object~ are attained in a regenerative heater comprisi~g a ~all and checker brickwork o~ refractory materials ha~ing di~erent coe~icient o~ linear expansion~
said wall and checker brickwork bei~g encased within a jacket and composed of superimposed horizontal sections corresponding to the distribution of internal operating temperature o~ the regene-rative heater~ each of the sections consisting of a homogeneous refractor~ material according to the invention, between the horizontal sections there are transition sections, each,being formed b~ at least one course of refractory materials of conti-guous horizontal sections~ the material of one sectio~ being . . . ~
. . , , , :
.: ... - .. .. . .
. . ~
uniforml~ dis-~ributed within that o~ the other section.
Such a construction o~ the re~erative heater is considerab-~y less susceptible to radial shif-ts in each course between the contiguous horizontal sections, due to which the clear opening of the vertical flue~ changes respectively less, which, in turn, makes it possible to increase the e~iciency of the heat-ers, hence, the furnaces they serve. Additionally, the uniform distribution o~ re~ractories of two contiguous horizontal section in each course o~ the walls and checker provides ~or a uniform distribution of strains over the entire cross-sectional area o~ the transition section .~nd for a smaller specific shift of the courses. The reduction in the shi~t betweer. the horizonta~
sections also contributes to the strength o~ the brickwork of the wal~s and checker, since the refractory materials will bQ charac-terized by a longer service life and the strained state o~ the 3acket of the regenerative heater will be improved in the areas of conjugation of the horizontal sections.
It is es~ecially advantageous to lay each transition sec tion o~ severa~ courses of both the contiguous horizontal secti-ons with a gra~ual reduction therein of the refractory material of one horizo~tal s~ction towards the other, which will co~tri-bute to smoothing the pro~i~e of the gas flues9 i.e~, to equa~
zing the cle.qr opening o~ the ~lues throughout the entire height of each transition sèction~ .
It has been established that the optimum height of the transitio~ section with respect to the total height of the regenerative heater make~ ~rom 0.15 to 5%~
. . . .
- : .. , . - ;
. . ~, .. . .: .
. .
. . . . . .
i35~6 Other objects and ad~antages o~ the present inv~ntion will become evident ~rom the following description o~ it3 one er~o-di;nent with re~erence to the accompan~ing drawingrs in which:
Fig~ 1 is an axia~ cross sectional view of the regenerati-ve heater, according to this invention;
Fig. 2 is a fragment o~ brickwork of the wall and checker in pre-heated state according to Fig. 1, enlarged for clarity of~epresentation;
~ ig~ 3 is same as ~ig. 2 as shown in a heated state;
~ ig~ 4 is a fràgment o~ the radial section on the line IV-IV -o~ part o~ the regenerative heater i~lustrated in ~ig. 1; and Fig~ 5 is a fragme~t of the radial section on the line V-V
o~ part of the regenerative heater i~lustrated in Figr 1 A~ it is evident ~rom Fig. 1 ~ the regenerative heater com-prises a jacket 1 made as a steel c~linder with a dome at the top, which encloses the brickwork o~ walls 2 and checker 3 mado of refractory materials with different coefficients of linear ~æpa~sion and ~ormed by superimposed horizontal sections corres-po~d~ng to the distribution o~ the heater interna~ operating te~perature, each o~ the horizontal sections consisting o~ a homogeneous re~ractory material.
The brickwork o~ the walls and checker consists o~ a plura-lit~ o~ superimposed courses ~o that vertical flues 4 shown in Figs 2 a~d 3 are ~ormed in the checker 3 for passage of gases.
In accordance with the distribution of the heater internal operating temperature, several superimposed courses of homogene~
ous material ~orm horizo~tal section~ 5, 6, 7~ 8. ~or e~carnple, - . . ~
, ' ' ; ~ ~ .' ` .
~8~8~L~
the top sec-tion 5 is made o~ dinas brick; the ne~t one, o~ high-alumina refractories and further of firecla~.
Disposed between the contiguous sections are transition sections 9 whichg according to the invention, contain at least one course from the refractor~ materials of the contiguous hori~
zontal sections with a uniform distribution therein of one mate-rial among the other.
Fig. 2 represents a fragment of the brickwork of the wall and check0r of the regenerative heater, according to Fig. 1, prior to operation. V0rtical ~lues 4 o~ checker 3 are rectilinear over the entire height both in the horizontal and transition sec-tions.
~ ach transition section 9, according to the preferred embo-diment of the invention, comprises, as shown in ~ig~ 2, several courses consisting of bricks of the contiguous sections.
~ he bricks in each course aro distributed uniformly over the entire radia~ sectiona~ area of the brickwor~ (~ig. 4 and 5) in such a wa~ that the number of bricks fxom material M for in-stance, of the horizontal section 5 gradually diminishes from course to course towards the horizontal section 6, whereas the number of bricks from material N o~ the contiguous horizontal ; section 6 increases respectively, that is the total number of bricks ~n each of the courses is constant, whereas the ratio of bricks made from the material of the contiguous sections varies as said above. ~he above condition is valid for all the horizontal sections.
In the course of operation of the heater the bric~Jork of , ;; . ~ , - 1 ;
.. ~ ;.......... .. - . , , -, .: : ... '; . , . ~ ,. ~ ,. . ; , .
1~85i8~1L6 the walls 2 and the checker ~ sustains tension and cornpression strains resultin~ in a shi~t of each course. With the number K
of the courses in the transition sections the relatlve shift o-f each course diminishes K times with respect to the common brick-work construction, hence the overlapping of the vertica'l f'lues ~
caused by the shift of the courses will be K times less~ Increas-ing K, it is possible to bring the over'lapping to an acceptible magnituae at which only some bending of the vertical flues will occur 'without reduction in the cross sectional area of the latter within the transition sections 9 (~ig. 3) due to which the rated efficienc~ of the re~enerative heatex wil~ be assured.
~ he height of each o~ the transition sections 9 is selected with due account o~ the planned e~ficiency, thermal characteris-tics, and design ~eatures of the regenerative heaters and will amount to Oc15 to 5% o~ the total height of the heater, i.e~, a value dependent o~ the brick height and the number of courses in each transition section.
Thus, due to the transition sections a gradual bending of tho vertical ~lues occurs at the conjugating areas o~ the hori-zontal sec~ions without diminishing the cross sectional areas o~
the flues which provides for the rated efficiency o~' the heaters9 increased brickwork strength and seruice life. ~he brickwork o~ ;~
the walls9 bending gradually, improves the s-trained state of the jacket in the areas of conjugation o~ the horizontal sections,~
rules out the appearance o~ large cracks in the brickwork and respectively enhances the operational reliability of the regene-rative heater. ?
, .
i . . . ..
.
. . ; .
,~ ; ,
As a result o~ such shift the peripheral flues of 40 mm dia-meter in the checker brickwork in the p~ane of conj~gation of the horizo~-tal sections will be overlapped up to 50-75~, and on the average in the brickwork section by 30-40%, which wi~l cause a respective loss of efficiency of the regenerative heater,hence~
of the blast furnace.
The relativo shift of the brickwork in the areas of conjuga-tion of the horizontal sections increases in direct proportion to the increas0 in the brickwork diameter and haating tempera-~ure.
~ he contemporary s-tage o~ blast furnace co~struction is characterized b~ a substantia~ increase in the volume of blast fu~naces ~up to 5000 m~) and hot blast temperature above 1400C~
Respecti~el~9 the dimensions of heaters rise up to 14 m in dia-meter, 50 m in height, while dome heating increases to 1600C.
All this entails the need to employ fox them néw materials, possessi~g higher re~ractoriness, who~e coefficien-t of linear ~:
axpansion signi~icantly di~fers ~rom that of commonly used xef- ;
ractor~ material~. ~hus, the danger o~ reduction in the effici-~ L!-- .. ~; ~ . ...
:, :, :
. . . . .
.
.
ency o~ modern l~r~e heater~ for the above rcason~ ~rows consi-derablyO
The principal object of the pxesent in~ention is to provi de a regenerative heater with such an arrangeme~t of the brick-work of the walls and checkers that would substantial~y reduce radial shi~t~ between conjugated horizonta~ sections.
A~other object of the inventio~ is to pro~ide a regenerati-ve heater with substantially constant clea~ opening of the ver-tical gas flues.
Still anothcr object o* the invention is to provide a rege-nerative heater with increased supporting power o~ the brick-work o~ the walls and checkers.
A ~urther object of the invention is to provide a regenera-tive,heater with uniform distribution of tensi~e and compres-sion strains ~aused by alternate heating and coolingO
~ hese and other object~ are attained in a regenerative heater comprisi~g a ~all and checker brickwork o~ refractory materials ha~ing di~erent coe~icient o~ linear expansion~
said wall and checker brickwork bei~g encased within a jacket and composed of superimposed horizontal sections corresponding to the distribution of internal operating temperature o~ the regene-rative heater~ each of the sections consisting of a homogeneous refractor~ material according to the invention, between the horizontal sections there are transition sections, each,being formed b~ at least one course of refractory materials of conti-guous horizontal sections~ the material of one sectio~ being . . . ~
. . , , , :
.: ... - .. .. . .
. . ~
uniforml~ dis-~ributed within that o~ the other section.
Such a construction o~ the re~erative heater is considerab-~y less susceptible to radial shif-ts in each course between the contiguous horizontal sections, due to which the clear opening of the vertical flue~ changes respectively less, which, in turn, makes it possible to increase the e~iciency of the heat-ers, hence, the furnaces they serve. Additionally, the uniform distribution o~ re~ractories of two contiguous horizontal section in each course o~ the walls and checker provides ~or a uniform distribution of strains over the entire cross-sectional area o~ the transition section .~nd for a smaller specific shift of the courses. The reduction in the shi~t betweer. the horizonta~
sections also contributes to the strength o~ the brickwork of the wal~s and checker, since the refractory materials will bQ charac-terized by a longer service life and the strained state o~ the 3acket of the regenerative heater will be improved in the areas of conjugation of the horizontal sections.
It is es~ecially advantageous to lay each transition sec tion o~ severa~ courses of both the contiguous horizontal secti-ons with a gra~ual reduction therein of the refractory material of one horizo~tal s~ction towards the other, which will co~tri-bute to smoothing the pro~i~e of the gas flues9 i.e~, to equa~
zing the cle.qr opening o~ the ~lues throughout the entire height of each transition sèction~ .
It has been established that the optimum height of the transitio~ section with respect to the total height of the regenerative heater make~ ~rom 0.15 to 5%~
. . . .
- : .. , . - ;
. . ~, .. . .: .
. .
. . . . . .
i35~6 Other objects and ad~antages o~ the present inv~ntion will become evident ~rom the following description o~ it3 one er~o-di;nent with re~erence to the accompan~ing drawingrs in which:
Fig~ 1 is an axia~ cross sectional view of the regenerati-ve heater, according to this invention;
Fig. 2 is a fragment o~ brickwork of the wall and checker in pre-heated state according to Fig. 1, enlarged for clarity of~epresentation;
~ ig~ 3 is same as ~ig. 2 as shown in a heated state;
~ ig~ 4 is a fràgment o~ the radial section on the line IV-IV -o~ part o~ the regenerative heater i~lustrated in ~ig. 1; and Fig~ 5 is a fragme~t of the radial section on the line V-V
o~ part of the regenerative heater i~lustrated in Figr 1 A~ it is evident ~rom Fig. 1 ~ the regenerative heater com-prises a jacket 1 made as a steel c~linder with a dome at the top, which encloses the brickwork o~ walls 2 and checker 3 mado of refractory materials with different coefficients of linear ~æpa~sion and ~ormed by superimposed horizontal sections corres-po~d~ng to the distribution o~ the heater interna~ operating te~perature, each o~ the horizontal sections consisting o~ a homogeneous re~ractory material.
The brickwork o~ the walls and checker consists o~ a plura-lit~ o~ superimposed courses ~o that vertical flues 4 shown in Figs 2 a~d 3 are ~ormed in the checker 3 for passage of gases.
In accordance with the distribution of the heater internal operating temperature, several superimposed courses of homogene~
ous material ~orm horizo~tal section~ 5, 6, 7~ 8. ~or e~carnple, - . . ~
, ' ' ; ~ ~ .' ` .
~8~8~L~
the top sec-tion 5 is made o~ dinas brick; the ne~t one, o~ high-alumina refractories and further of firecla~.
Disposed between the contiguous sections are transition sections 9 whichg according to the invention, contain at least one course from the refractor~ materials of the contiguous hori~
zontal sections with a uniform distribution therein of one mate-rial among the other.
Fig. 2 represents a fragment of the brickwork of the wall and check0r of the regenerative heater, according to Fig. 1, prior to operation. V0rtical ~lues 4 o~ checker 3 are rectilinear over the entire height both in the horizontal and transition sec-tions.
~ ach transition section 9, according to the preferred embo-diment of the invention, comprises, as shown in ~ig~ 2, several courses consisting of bricks of the contiguous sections.
~ he bricks in each course aro distributed uniformly over the entire radia~ sectiona~ area of the brickwor~ (~ig. 4 and 5) in such a wa~ that the number of bricks fxom material M for in-stance, of the horizontal section 5 gradually diminishes from course to course towards the horizontal section 6, whereas the number of bricks from material N o~ the contiguous horizontal ; section 6 increases respectively, that is the total number of bricks ~n each of the courses is constant, whereas the ratio of bricks made from the material of the contiguous sections varies as said above. ~he above condition is valid for all the horizontal sections.
In the course of operation of the heater the bric~Jork of , ;; . ~ , - 1 ;
.. ~ ;.......... .. - . , , -, .: : ... '; . , . ~ ,. ~ ,. . ; , .
1~85i8~1L6 the walls 2 and the checker ~ sustains tension and cornpression strains resultin~ in a shi~t of each course. With the number K
of the courses in the transition sections the relatlve shift o-f each course diminishes K times with respect to the common brick-work construction, hence the overlapping of the vertica'l f'lues ~
caused by the shift of the courses will be K times less~ Increas-ing K, it is possible to bring the over'lapping to an acceptible magnituae at which only some bending of the vertical flues will occur 'without reduction in the cross sectional area of the latter within the transition sections 9 (~ig. 3) due to which the rated efficienc~ of the re~enerative heatex wil~ be assured.
~ he height of each o~ the transition sections 9 is selected with due account o~ the planned e~ficiency, thermal characteris-tics, and design ~eatures of the regenerative heaters and will amount to Oc15 to 5% o~ the total height of the heater, i.e~, a value dependent o~ the brick height and the number of courses in each transition section.
Thus, due to the transition sections a gradual bending of tho vertical ~lues occurs at the conjugating areas o~ the hori-zontal sec~ions without diminishing the cross sectional areas o~
the flues which provides for the rated efficiency o~' the heaters9 increased brickwork strength and seruice life. ~he brickwork o~ ;~
the walls9 bending gradually, improves the s-trained state of the jacket in the areas of conjugation o~ the horizontal sections,~
rules out the appearance o~ large cracks in the brickwork and respectively enhances the operational reliability of the regene-rative heater. ?
, .
i . . . ..
.
. . ; .
,~ ; ,
Claims (3)
1. A regenerative heater, comprising a wall and checker brickwork of refractory materials having different coefficients of linear expansion, said wall and checker brickwork being encased within a jacket and comprising superimposed horizontal sections corresponding to the distribution of internal operat-ing temperature of the regenerative heater and transition sections; each of said horizontal sections being made of a homogeneous refractory material; each of said transition sections being disposed between said horizontal sections and formed by at least one course of refractory materials of horizontal sections contiguous to said transition section, the refractory material of one section being uniformly distributed within that of the other section.
2. A regenerative heater according to claim 1, wherein the transition section is formed by several courses made of the refractory materials of the contiguous sections, the materials being uniformly distributed in each course and superimposed so that the content of the material in one of the contiguous horizontal sections gradually diminishes from course to course toward the other section.
3. A regenerative heater according to claim 1, wherein the height of each of the transition sections ranges from 0.15 to 5% of the total height of the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA287,941A CA1085816A (en) | 1977-10-03 | 1977-10-03 | Regenerative heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA287,941A CA1085816A (en) | 1977-10-03 | 1977-10-03 | Regenerative heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1085816A true CA1085816A (en) | 1980-09-16 |
Family
ID=4109680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA287,941A Expired CA1085816A (en) | 1977-10-03 | 1977-10-03 | Regenerative heater |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1085816A (en) |
-
1977
- 1977-10-03 CA CA287,941A patent/CA1085816A/en not_active Expired
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |