CN102382973A - Heating mantle for hood type annealing furnace - Google Patents
Heating mantle for hood type annealing furnace Download PDFInfo
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- CN102382973A CN102382973A CN2011103208633A CN201110320863A CN102382973A CN 102382973 A CN102382973 A CN 102382973A CN 2011103208633 A CN2011103208633 A CN 2011103208633A CN 201110320863 A CN201110320863 A CN 201110320863A CN 102382973 A CN102382973 A CN 102382973A
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Abstract
The invention discloses a heating mantle for a hood type annealing furnace, which comprises a heating mantle shell and at least one combustor group arranged on the shell, wherein each combustor group comprises two heat accumulating type combustors; each heat accumulating type combustor comprises a combustion gas runner, a fuel gas inlet, a heat accumulating type heat exchanger and a burner; one end of the fuel gas inlet is connected with an external fuel gas branch pipe by a solenoid valve, and the other end of the fuel gas inlet is communicated with the burner after penetrating through the heat accumulating type heat exchanger; the combustion gas runners of the two heat accumulating type combustors are respectively connected with an inlet of a four-way reversing valve, the other two inlets of the four-way reserving valve are respectively communicated with an external air pipeline and an external waste gas pipeline; and by the switching on the four-way reversing valve, the two combustion gas runners are alternatively communicated with the air pipeline and the waste gas pipeline, so that the alternated combustion of the two combustors in the combustor group can be realized. The heating mantle can cause the heating temperature of a heating chamber to be uniform, and simultaneously reduces the temperature difference and the annealing time in steel coil annealing, improves the steel coil annealing quality, saves fuel, prolongs the service life of an inner hood, and is easy to control the heating state of the annealing furnace.
Description
Technical field
The invention belongs to the bell-type annealing furnace apparatus in a kind of heat treatment process, be specifically related to a kind of heating mantles that is used for bell type annealing furnace.
Background technology
Bell type annealing furnace is the normal a kind of cyclical heat treatment facility that uses in cold-rolled steel coils or other metallic substance annealing process, mainly is made up of table, inner cover, heating mantles, cooling cowl etc.The bell type annealing furnace heating mantles generally is made up of parts such as cover body, burner, interchanger, airline, gas line, flue gas pipeline, burner blowers.In its working process, burner is in the heating of heating mantles combust fuel, and high-temperature flue gas reduces through temperature behind the interchanger, discharges outside the heating mantles, simultaneously combustion air is heated.
The burner of existing bell type annealing furnace heating mantles is arranged in the heating mantles bottom more, is divided into two rows or three row's staggered arrangement, and burner burns simultaneously and heats; Flue gas is discharged from the smoke outlet on heating mantles top, and this makes that in the bell type annealing furnace heat-processed, its underpart is near burner region; Temperature is higher, makes inner cover lower section temperature higher, and this has caused the stacking coil of strip bottom steel roll temperature in the inner cover higher; Steel roll temperature is inhomogeneous, has the big temperature difference, causes the phenomenon of steel roll binding easily; Simultaneously, it is temperature required to exist the bottom coil of strip to reach annealing, but the phenomenon that the top steel roll temperature does not also reach requires temperature in order to make the top coil of strip reach annealing, makes funnel temperature very high, and prolong heat-up time, caused the huge waste of fuel.
Summary of the invention
Shortcoming to above-mentioned existing bell type annealing furnace heating mantles; The present invention proposes a kind of heating mantles that is used for bell type annealing furnace, through the packet layout of burner on heating mantles and the combustion system of cross beat, makes that the interior temperature field of heating mantles is more even; Improved the coil annealing quality; Reduce bell type annealing furnace heat-up time, reduced the bell type annealing furnace funnel temperature, have simple in structure, floor space is little, working cost is low, fuel saving and the good advantage of heats.
Realize that the concrete technical scheme that the object of the invention adopted is following:
A kind of heating mantles that is used for bell type annealing furnace; Comprise the heating mantles housing and be arranged at least one sets of burners on this housing; Wherein, each said sets of burners comprises two heat-storage type burners of paired layout, and said heat-storage type burner comprises combustion gases runner, fuel gas inlet, heat regenerator and burner; Said fuel gas inlet one end is connected through SV with outside combustion gas arm; With the input of control combustion gas, the other end is communicated with burner after passing heat regenerator, the combustion gases runner of two heat-storage type burners) be connected respectively to inlet of four-way change-over valve separately; This four-way change-over valve) other two inlets are communicated with external air duct and exhaust pipeline respectively; Through switching, realize alternately being communicated with of two combustion gases runners and air line and exhaust pipeline, thereby realize the alternate combustion of two burners in each sets of burners four-way change-over valve.
Burner is installed on heating mantles; Bell type annealing furnace is when heating coil of strip; Each burner burns respectively or as the flue gas exhaust channel, flue gas is in passing through the process of burner, with the heat storage heating of burner latter half; Simultaneously, combustion air is heated by its heat storage through participation incendiary burner the time; Through the effect of pipeline shifter, each burner is done the cross beat burning.
Burner is installed on heating mantles, is divided into some groups, and 2 of every group of burner numbers are evenly arranged on the bell type annealing furnace heating mantles; Each burner has the angle of a tangential, makes flame tangential heating inner cover, prevents that thermal-flame is directly over against inner cover.
The interchanger of each burner is installed in the burner back, and during heating mantles work, airflow is heated through interchanger and gets into burner participation burning then, and perhaps high-temperature flue gas passes through interchanger through burner, with the heat transferred interchanger.
The flue gas heat of the bell type annealing furnace heating mantles among the present invention reclaims by the heat regenerator of each burner back and accomplishes, and has replaced the metal heat exchanger of original bell type annealing furnace, has heat exchange efficiency height, volume is little, in light weight, cost is low characteristics.
The pipeline shifter is made up of air switching valve, flue gas switching valve and combustion gas switching valve, switches the flow direction of air and flue gas and combustion gas respectively.
Bell type annealing furnace is when heating coil of strip; Each burner hockets respectively and burns and smoke evacuation, and flue gas is in passing through the process of burner, with the interchanger heating of burner latter half; Simultaneously, combustion air is heated by its interchanger through participation incendiary burner the time; Through the effect of pipeline shifter, each burner is done the cross beat burning, and switching time is by the system control that configures in advance.
Two burners in every group among the present invention take turns to operate, and do the cross beat burning, and flue gas back and forth flows internally to cover in stove and heats, and makes that the inner cover temperature is more even, has improved fuel combustion efficiency and furnace heat transfer efficient.
The interchanger that burner adopted among the present invention adopts ceramic heat storage body to make; Withstand corrosion and can fully absorb the waste heat of flue gas; Funnel temperature is reduced to below 150 ℃, even can reaches normal temperature, after funnel temperature drops to below 150 ℃, can produce the dew point lye; Sour gas such as the oxynitride in the flue gas can be attracted in the dew point lye, can alleviate the pollution to environment.
Description of drawings
Fig. 1 is a kind of heating mantles outside view that is used for bell type annealing furnace of the present invention.
Fig. 2 is a kind of heating mantles principle of work synoptic diagram that is used for bell type annealing furnace of the present invention.
Fig. 3 is the sets of burners structural representation among the present invention.
Fig. 4 is the structural representation of employed burner among the present invention.
Fig. 5 is a kind of typical burner arrangement form synoptic diagram on a certain height among the present invention.
Embodiment
Further specify the present invention below in conjunction with specific embodiment and accompanying drawing.
Shown in Fig. 2-5, used for hood-type annealing furnace heating mantles of the present invention is located on the table 11 of bell type annealing furnace, and set inside has inner cover 12 and coil of strip 13.
Heating mantles comprises heating mantles housing 1 and is arranged at least one sets of burners on the housing 1, is preferably 4 in the present embodiment.
By shown in Figure 3, each sets of burners includes the two paired heat-storage type burners of arranging 2.By shown in Figure 4; Each heat-storage type burner 2 comprises combustion gases runner 15, fuel gas inlet 17, heat regenerator 16 and burner 18; Wherein, Heat regenerator is positioned at burner 18 rear portions, combustion gases runner 15 heat regenerator 16 of flowing through, and fuel gas inlet 17 is connected to burner 18 after passing heat regenerator 16.
When the bell type annealing furnace heating mantles was worked, when the burner operation state heated for burning, combustion air was heated then through heat storage and participates in burning through burner; When the burner operation state was accumulation of heat, the flue gas of stove internal combustion got into heat storage through burner, and its heat is absorbed by heat storage.
The smoke discharging pipe place is equipped with induced draft fan, and the air line place is equipped with gas blower.
By shown in Figure 4; Combustion gases runner 15 links to each other with smoke discharging pipe or air line 5 through four-way change-over valve 3; This makes the combustion gases runner both can serve as the air runner, can serve as flue gas again and discharge runner, and the conversion of these two kinds of functions is regulated four-way change-over valve through system and realized; Be provided with SV 14 before the gas pipeline, by the circulation of system control fuel.The working order of burner is divided into two kinds, and a kind of is the smoke evacuation state, and a kind of is burning state.In the smoke evacuation state,, combustion gases runner 15 is linked to each other with smoke discharging pipe 9 through four-way change-over valve 3; System is closed the SV above the gas pipeline simultaneously, and by the combustion gas circulation, burner 18 places do not have fuel gas buring; High-temperature flue gas in the bell type annealing furnace heating mantles is owing to pressure, through burner 18, the heat storage of flowing through, with passing through smoke discharge tube road 9 discharge systems behind the heat transferred heat storage; This process flue-gas temperature reduces, and regenerator temperature raises; After the smoke evacuation process continued for some time, system made combustion gases runner 15 link to each other with air line 5 through regulating four-way change-over valve 3; Control SV simultaneously and open, make combustion gas get into burner 18, air admission combustion gases runner 15; The heat storage of flowing through is burnt at burner 18 places and combustion gas mixing by high-temperature heat accumulation body heating back, in this process; Heat storage with the heat transferred air, self temperature reduces gradually.In the working process of this bell type annealing furnace, each burner all is under the adjusting of system, to do the cross beat burning.
Each sets of burners can be arranged on arranged crosswise on the sustained height or different heights when on the bell type annealing furnace heating mantles, arranging a plurality of sets of burners, and links together through pipeline and four-way valve, SV.Fig. 5 is a kind of typical burner arrangement figure on a certain height, and is as shown in Figure 5, and each burner avoids burner flame directly to wash away the inner cover wall all along the inner cover arranged tangential, prolongs inner cover work-ing life.
As shown in Figure 2; 4 sets of burners A, B, C and D have been arranged on the heating mantles of present embodiment altogether; Every group has two burners, is respectively burner A1, burner A2, burner B1, burner B2, burner C1, burner C2, burner D1, burner D2.In working order shown in Figure 2, the SV of each burner front of system control burner control makes burner A2, B2, C2, D2 place have combustion gas to feed; Simultaneously; The control four-way change-over valve makes air pass through pipeline and four-way change-over valve, gets into burner A2, B2, C2, D2; Heat storage through these 4 burner rear portions is heated to certain temperature, in burner place and combustion gas mixing burning; The interior reason of stove owing to pressure; Make high-temperature flue gas get into these four burners by the burner place of burner A1, B1, C1, D1, the heat storage of flowing through, heat storage carries out waste heat recovery to high-temperature flue gas; Flue gas self temperature is reduced to below 150 ℃, flows to smoke discharging pipe 9 through four-way change-over valve.Keep such working order after for some time, system is regulated the SV before each burner, makes before burner A1, B1, C1, the D1 that combustion gas feeds again; And other four burners do not have combustion gas to feed; Regulate four-way change-over valve simultaneously, make air pass through pipeline and four-way change-over valve, get into burner A1, B1, C1, D1; Heat storage through these 4 burner rear portions is heated to certain temperature, in burner place and combustion gas mixing burning; The interior reason of stove owing to pressure; Make high-temperature flue gas get into these four burners by the burner place of burner A2, B2, C2, D2, the heat storage of flowing through, heat storage carries out waste heat recovery to high-temperature flue gas; Flue gas self temperature is reduced to below 150 ℃, flows to smoke discharging pipe 9 through four-way change-over valve.Under this operating mode, every group of burner carries out the cross beat burning like this.
More than narration is a kind of typical condition of this novel crossed intermittent combustion bell type annealing furnace.Because in the practical work process of bell type annealing furnace, the temperature of coil of strip is changing always, therefore needed heated condition is also changing always; Therefore, system can be controlled the working condition of each burner of each group respectively, such as; When needs added the big operating mode of heat, four groups of burners among Fig. 2 all had one to burn for every group, and one is carried out accumulation of heat; Add the heat demand little in, can close one group or many group burners, neither burn; Also do not carry out accumulation of heat, everything can have system to regulate according to the sequence of control that designs in advance automatically according to actual condition.
In order to simplify the workflow of this bell type annealing furnace of narration, have only 4 groups of burners among Fig. 2, this bell type annealing furnace in the reality can be the sets of burners that arbitrary number is arranged, and specifically can confirm according to practical situation such as bell type annealing furnace size and demand for heat.
Claims (4)
1. heating mantles that is used for bell type annealing furnace; Comprise heating mantles housing (1) and be arranged at least one sets of burners on this housing (1); Wherein, Each said sets of burners comprises two heat-storage type burners (2) of paired layout; Said heat-storage type burner (2) comprises combustion gases runner (15), fuel gas inlet (17), heat regenerator (16) and burner (18), and said fuel gas inlet (17) one ends are connected through SV (14) with outside combustion gas arm (4), with the input of control combustion gas; The other end passes heat regenerator (16) back and is communicated with burner (18); The combustion gases runner (15) of two heat-storage type burners (2) is connected respectively to (3) inlets of four-way change-over valve separately, and other two inlets of this four-way change-over valve (3) are communicated with external air duct (5) and exhaust pipeline (6) respectively, through the switching to four-way change-over valve (3); Realize alternately being communicated with of two combustion gases runners (15) and air line (5) and exhaust pipeline (6), thereby realize the alternate combustion of two burners (2) in each sets of burners.
2. heating mantles according to claim 1 is characterized in that, described fume emission pipeline (9) locates to be equipped with induced draft fan, and air line (8) locates to be equipped with gas blower.
3. heating mantles according to claim 1 and 2 is characterized in that, said sets of burners is 4.
4. according to the described heating mantles of one of claim 1-3; It is characterized in that; When one of them combustion gases runner is communicated with air line; Another combustion gases runner is communicated with exhaust pipeline, and when switching four-way change-over valve (3), the combustion gases runner that is communicated with air line then switches to exhaust pipeline and is communicated with; Be communicated with the combustion gases runner with exhaust pipeline and switch to air line and be communicated with, realize two combustion gases runners alternately being communicated with through this four-way change-over valve (3) and air line and exhaust pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320863.3A CN102382973B (en) | 2011-10-20 | 2011-10-20 | Heating mantle for hood type annealing furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320863.3A CN102382973B (en) | 2011-10-20 | 2011-10-20 | Heating mantle for hood type annealing furnace |
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| CN102382973A true CN102382973A (en) | 2012-03-21 |
| CN102382973B CN102382973B (en) | 2014-07-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514868A (en) * | 2009-03-03 | 2009-08-26 | 无锡鹰普精密铸造有限公司 | Roasting industrial furnace |
| CN201778080U (en) * | 2010-08-18 | 2011-03-30 | 宝山钢铁股份有限公司 | Heat accumulating type soaking pit furnace |
| CN201926297U (en) * | 2010-12-01 | 2011-08-10 | 自贡佳源炉业有限公司 | Novel heat accumulating type burner heating furnace |
| CN202380054U (en) * | 2011-12-15 | 2012-08-15 | 华中科技大学 | Heating hood for hood-type annealing furnace |
-
2011
- 2011-10-20 CN CN201110320863.3A patent/CN102382973B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514868A (en) * | 2009-03-03 | 2009-08-26 | 无锡鹰普精密铸造有限公司 | Roasting industrial furnace |
| CN201778080U (en) * | 2010-08-18 | 2011-03-30 | 宝山钢铁股份有限公司 | Heat accumulating type soaking pit furnace |
| CN201926297U (en) * | 2010-12-01 | 2011-08-10 | 自贡佳源炉业有限公司 | Novel heat accumulating type burner heating furnace |
| CN202380054U (en) * | 2011-12-15 | 2012-08-15 | 华中科技大学 | Heating hood for hood-type annealing furnace |
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| Publication number | Publication date |
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| CN102382973B (en) | 2014-07-23 |
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