CN205933926U - Whole heat treatment system is changed on line to large -scale hot -blast furnace vault - Google Patents
Whole heat treatment system is changed on line to large -scale hot -blast furnace vault Download PDFInfo
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- CN205933926U CN205933926U CN201620910912.7U CN201620910912U CN205933926U CN 205933926 U CN205933926 U CN 205933926U CN 201620910912 U CN201620910912 U CN 201620910912U CN 205933926 U CN205933926 U CN 205933926U
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Abstract
The utility model relates to a whole heat treatment system is changed on line to large -scale hot -blast furnace vault. The heating part includes electric heater, and the cage frame of installing support for arranging hot -blast furnace vault inner chamber in is echelon layering installation several electric heater on the cage frame, and the heating output that the power cord was connected to intelligent temperature controller is drawn forth in the grouping of several electric heater, temperature measurement and accuse temperature part are including thermocouple, intelligent temperature controller, and several thermocouple laminate arrangement is outside in the hot -blast furnace vault, the anti - feeder line connected intelligent temperature controller of thermocouple, and the temperature -sensing element and the surperficial spot welding of hot -blast furnace vault of thermocouple are connected, and intelligent temperature controller's power supply is portable diesel power genration car, the heat preservation is laid to hot -blast furnace vault outer wall, and the port passes through knee wall buttress and sets up steel structure platform, the last heat preservation of laying of steel structure platform under the hot -blast furnace vault. The utility model discloses a whole electricity adds thermal treatment technology, can eliminate welding stress, prevents that welding seam hydrogen embrittlement and crackle from producing, reaches reduction hardness, improves plasticity and toughness purpose.
Description
Technical field
This utility model is related to heat treatment system, and bulk heat treatmet system changed online by specifically a kind of large-scale air stove vault
System.
Background technology
At present, large-scale（4000 cubic metres）Blast furnace internal combustion stove, in use, because dome temperature is high, makes
With ill-conditioned, in the case of intergranular stress corrosion, can cracking in many places in mother metal, now then needs integral replacing vault.But
Air stove vault always weighs about 111 tons, maximum gauge 12200mm, furnace roof absolute altitude 47470mm, changes position absolute altitude 37334mm, that is,
Change 10 meters of vaults in 37 meters of absolute altitudes.Except guarantee welding quality is it is necessary to carry out bulk heat treatmet, that is, eliminate welding stress, and
Avoid the generation of intergranular stress corrosion（Occur under stress and acid medium collective effect）.In addition, scene has other hot blasts
Stove normally uses, and is coal gas deathtrap, does not allow naked light, the conventional fuel oil heat-treatment protocol of exclusion, weld seam local heat treatmet, by
It is welding rigid body in air stove, differential annealing eliminates stress and will produce larger thermograde stress to housing, affects housing
Precision and safe handling situation, do not allow adopt.As hot heat treatment is electrolysed using whole interior, due to the air stove useful space
About 820 cubic metres, 111 tons of weight, need 2100 kilowatts of heats by thermodynamic computing, scene cannot solve so big electricity.
Utility model content
This utility model is directed to the problems referred to above that prior art exists, and provides a kind of online replacing of large-scale air stove vault whole
Body heat processing system, considers from safe mass, using overall electric-heating heat treatment method, eliminates welding stress, it is to avoid intergranular splits
The generation of stricture of vagina.
This utility model solves its technical problem and employed technical scheme comprise that：
Bulk heat treatmet system changed online by a kind of large-scale air stove vault, including：Heating part, thermometric and temperature control portion
Point, insulating sections；
（1）Heating part includes electric heater, the mounting bracket of electric heater, and described mounting bracket is to be placed in air stove
The caged framework of vault inner chamber, the periphery of caged framework, near vault medial wall, is in that echelon is layered on the periphery of caged framework
Several electric heaters are installed, are respectively mounted several electric heaters in the above and below of caged framework, several electric heater packets are drawn
Power line connects to the heating outfan of intelligent temperature controller；
（2）Thermometric and temperature control part include thermocouple, intelligent temperature controller, and several thermocouple layered arrangement, including end socket top
Thermocouple, upper strata thermocouple, middle level thermocouple and lower floor's thermocouple, the feedback line of thermocouple connects intelligent temperature controller, thermocouple
Temperature-sensing element be connected with air stove vault housing outer surface spot welding, the power supply of intelligent temperature controller is portable diesel generation
Car；
（3）Insulating sections include the heat-insulation layer of air stove vault outer wall laying, the sealing structure of air stove vault lower port,
Described sealing structure includes supporting pier, being placed in the steel structure platform supporting on pier, be laid on steel structure platform of bottom
On heat-insulation layer.
Using this utility model of technique scheme, compared with prior art, its advantage is：
（1）Heat treatment is carried out using electrical heating method, in air stove vault cavity arrangements heat source, the laying of vault outer wall is protected
Warm adiabator, using heat radiation and hot-air convection heating, has reached the purpose of uniform heating；
（2）Heat treatment process passes through intelligent temperature controller, realizes multiple spot team control；Each point temperature is shown by instrument, automatically repaiies
Positive heating power coefficient, record temperature curve is it can be ensured that temperature-controlled precision automatically；
（3）This utility model can be improved with the residual stress of abatement apparatus assembling and welding, the physical dimension of stabilizing equipment
The tissue of welding point and heat affected area and performance, reduce the purpose of hardness, raising plasticity and toughness, further release weldering
Harmful gass in seam, prevent the hydrogen embrittlement of weld seam and the generation of crackle.
Further, this utility model preferred version is：
The caged framework that the mounting bracket of electric heater is welded for angle steel.
Electric heater is NJ type frame-type heater, and electric heater quantity is 210, and every heating power is 10KW, electricity
Heater general power is 2100KW；The top surface of caged framework installs 24 electric heaters, and 42 electricity are installed in the bottom surface of caged framework
Heater, the periphery of caged framework divides from bottom to top 4 layers of installation electric heater in echelon, and ground floor installs 48 electrical heating
Device, second and third layer is respectively mounted 36 electric heaters, 24 electric heaters of the 4th layer of installation.
The stove interior power line of electric heater is made up of the round steel of ∮ 6.5 and the alumina ceramic tube of round steel overcoat, stove interior power line
External cable is connected after drawing outside stove, then the heating outfan being connected to intelligent temperature controller by external cable；The zero of electric heater
Line connects the caged framework of steel construction, and caged framework is connected as public zero curve with furnace shell.
Thermocouple is the plainly-packed thermocouple of K-type, and thermocouple divides three layers of arrangement, and on end socket top, arrangement 3, upper strata arrange 8, in
Layer arrangement 12, lower floor arrange 10, arrange 33 thermocouples altogether.
Intelligent temperature controller is ZWK type computer temperature control instrument, and output is 360KW；Intelligent temperature controller arranges 6, for intelligence
The peak power of the portable diesel-oil electric generator wagon output that temperature controller is powered is 2100kw.
Heat-insulation layer is configured by the two-layer super glass wool being superimposed, and insulation layer thickness is 100mm.
Brief description
Fig. 1 is the structural representation of this utility model embodiment；
Fig. 2 is that the heat treatment of embodiment heats process curve；
In figure：Air stove vault 1；Heat-insulation layer 2；Stove interior power line 3；External cable 4；Thermocouple 5；Thermocouple feedback line 6；
Caged framework 7；Top electric heater 8；4th layer of electric heater 9；Third layer electric heater 10；Second layer electric heater 11；The
One layer of electric heater 12；Bottom electric heater 13；Support pier 14；Steel structure platform 15；Portable diesel-oil electric generator wagon 16；Intelligence
Temperature controller 17.
Specific embodiment
Below in conjunction with drawings and Examples in detail this utility model is described in detail, but the present embodiment does not constitute any limit to this utility model
System.
Referring to Fig. 1, the present embodiment is to be diameter 12200mm to nominal dimension（10600mm/10213mm）×101360mm
（High）× 45/28mm, weight are that 110 tons of blast funnace hot blast stove furnace roof is changed, the overall heat online of postwelding carrying out by design requirement
Processing system, is made up of heating part, thermometric and temperature control part, insulating sections and power supply.
Heating part：
Calculated according to hot merit, heating power needed for Technology for Heating Processing is 2100KW.Therefore, the electric heater of heating part is adopted
With 210 NJ type frame-type electric heaters, the heating power of every electric heater is 10KW, overall dimensions 1000 × 400 ×
90mm, electric heater general power is 2100KW；
The caged framework 7 of one angle steel welding is installed in the inner chamber of air stove vault 1, the periphery of caged framework 7 is near warm
The medial wall of wind furnace vault 1, all electric heaters are all arranged on caged framework 7, and concrete arrangement is：Caged framework 7
Top surface installs 24 top electric heaters 8, and 42 bottom electric heaters 13, the week of caged framework 7 are installed in the bottom surface of caged framework 7
4 layers of arrangement are divided in echelon on edge, ground floor electric heater 12 is 48 from bottom to top, the second electric heater 11 and third layer electricity add
Hot device 10 is respectively 36, and the 4th layer of electric heater 9 is 24；All electric heaters are pressed triplet and are drawn a power line,
Stove interior power line 3 is made up of the round steel of ∮ 6.5 and the alumina ceramic tube of round steel overcoat, and stove interior power line 3 connects outer after drawing outside stove
Portion's cable 4, then it is connected to the heating outfan of intelligent temperature controller 17 by external cable 4；The zero line of all electric heaters welds as one
Body, is connected with caged framework 7 as public zero curve, and caged framework 7 is connected with furnace shell；
It is distributed in the electric heater in air stove vault 1 inner chamber in echelon, every three one group, each self-forming isolated power network,
Institute's having heaters all using star connection, synchronous electrified regulation.Using the heating technique of heat radiation and thermal convection current, make hot blast chimney arch
Top 1 reaches the purpose of uniform heating anneal.
Thermometric and temperature control part：
Using thermocouple 5 thermometric, thermocouple 5 is the plainly-packed thermocouple of K-type, and 5 points three layers of thermocouple is arranged in air stove vault 1
Outside, wherein, end socket top thermocouple arranges 3, upper strata thermocouple arrangement 8, and middle level thermocouple arranges 12, lower floor's thermocouple
Arrangement 10, arranges 33 thermocouples 5 altogether；Thermocouple feedback line 6 adopts copper-constantan compensating conductor, and each thermocouple 5 all passes through
Thermocouple feedback line 6 is connected with intelligent temperature controller 17, and the temperature-sensing element of thermocouple 5 is connected with air stove vault 1 outer surface spot welding,
The actual heating-up temperature of air stove vault 1 can really be reacted；
Using intelligent temperature controller 17 temperature control, intelligent temperature controller 17 is ZWK type computer temperature control instrument, arranges 6 intelligent temperature controls altogether
Instrument 17, the output of every intelligent temperature controller 17 is 360KW, 0 1000 DEG C of temperature controlling range, and control accuracy is ± 1 DEG C；
Air stove vault 1 each point temperature passes to intelligent temperature controller 17 by the thermocouple 5 of each point, monitors control by intelligent temperature controller 17
System, the suitable microcomputer of every intelligent temperature controller 17, it is previously entered technological parameter, the temperature coming by temperature sensor and setting
Constant temperature degree calculates, by PID, the heating that corresponding power controls heater more afterwards, and temperature control process is automatically performed, and by continuous way
Monitor records process curve automatically.
Insulating sections：
Including the sealing structure of the heat-insulation layer 2 of air stove vault 1 outer wall laying, air stove vault 1 lower port, this sealing is tied
Structure supporting pier 14, being placed in the steel structure platform 15 supporting on pier 14, the guarantor being laid on steel structure platform 15 by bottom
Warm layer 2 is constituted, and heat-insulation layer 2 is the two-layer superfine glass cotton-wadded quilt being superimposed, and superfine glass cotton-wadded quilt meets QJ/GN30-89 mark
Standard, good heat insulating, heat conductivity is low, and unit weight is light, not higher than 60 DEG C of exospheric temperature during heating；In order to reduce heat loss, insulation
The thickness of layer 2 cannot be less than 100mm；Between two-layer superfine glass cotton-wadded quilt, seam staggers overlap joint tightly, and is tightened with iron wire, prevents
Heat scatters and disappears and causes local temperature difference excessive and form thermal stress.
Power supply：
Due to the irreversibility of heat treatment, power supply and the safety utilization of electric power of heat treatment on spot must be guaranteed.According to above hot merit meter
Calculate, bulk heat treatmet needs 6 ZWK type intelligent temperature controllers 17, that is, the peak power of electric power system output is permissible during 2100kw
Meet heat demand during heat treatment.Therefore, power supply adopts portable diesel-oil electric generator wagon 17, from portable diesel-oil electric generator wagon
17 to heat treatment job site arranges 6 DZ-600/600 automatic air-break switches, 6 transmission pressures（Centre is through air switch）Point
Wei not 3 × 150+l × 70mm2 copper stamen cable.
At air stove vault 1 lower port, the steel structure platform 15 of setting, during bulk heat treatmet, also has reduction end
The function of mouth position distortions.
This online replacing bulk heat treatmet system of this utility model, it is necessary to strict implement heating technological specification, is incubated face
Insulation when at segmentation downward 1.5 meters it is ensured that in heat treatment each position temperature difference reach process specifications, prevent the temperature difference should
The excessive deformation causing of power, its heat treatment heats technological specification is：
570 ± 20 DEG C of thermostat temperature；
Constant temperature time 4.5 hours；
200-250 DEG C, the dehydrogenation that insulation controls for 2 hours；
Programming rate≤108 DEG C/h（Can not control before 200 DEG C）；
Cooling rate phase≤140 DEG C/h（Can not control after 400 DEG C）；
Maximum temperature difference ± 20 DEG C during constant temperature（≤40℃）Maximum temperature difference≤120 DEG C during heating, cooling；
Heat treatment heating process curve is as shown in Figure 2.
The foregoing is only the preferably feasible embodiment of this utility model, not thereby limit to power of the present utility model
The equivalent structure change that sharp scope, all utilization this utility model description and accompanying drawing content are made, is both contained in this utility model
Interest field within.
Claims (7)
1. bulk heat treatmet system changed online by a kind of large-scale air stove vault, including heating part, thermometric and temperature control part, guarantor
Isothermal segment it is characterised in that：
（1）Heating part includes electric heater, the mounting bracket of electric heater, and described mounting bracket is to be placed in air stove vault
The caged framework of inner chamber, the periphery of caged framework, near vault medial wall, is in that echelon layering is installed on the periphery of caged framework
Several electric heaters, are respectively mounted several electric heaters in the above and below of caged framework, and power supply is drawn in several electric heater packets
Line connects to the heating outfan of intelligent temperature controller；
（2）Thermometric and temperature control part include thermocouple, intelligent temperature controller, and several thermocouple layered arrangement, including end socket top thermoelectricity
Even, upper strata thermocouple, middle level thermocouple and lower floor's thermocouple, the feedback line of thermocouple connects intelligent temperature controller, the sense of thermocouple
Warm element is connected with air stove vault housing outer surface spot welding, and the power supply of intelligent temperature controller is portable diesel-oil electric generator wagon；
（3）Insulating sections include the heat-insulation layer of air stove vault outer wall laying, the sealing structure of air stove vault lower port, described
Sealing structure include bottom support pier, be placed in support pier on steel structure platform, be laid on steel structure platform
Heat-insulation layer.
2. large-scale air stove vault according to claim 1 change bulk heat treatmet system online it is characterised in that：Electricity adds
The caged framework that the mounting bracket of hot device is welded for angle steel.
3. large-scale air stove vault according to claim 1 change bulk heat treatmet system online it is characterised in that：Electricity adds
Hot device is NJ type frame-type heater, and electric heater quantity is 210, and every heating power is 10KW, electric heater general power
For 2100KW；The top surface of caged framework installs 24 electric heaters, and 42 electric heaters, cage frame are installed in the bottom surface of caged framework
4 layers of installation electric heater are divided in echelon on the periphery of frame, ground floor installs 48 electric heaters from bottom to top, second and third layer divides
Not An Zhuan 36 electric heaters, the 4th layer installation 24 electric heaters.
4. the large-scale air stove vault according to Claims 2 or 3 change bulk heat treatmet system online it is characterised in that：
The stove interior power line of electric heater is made up of the round steel of ∮ 6.5 and the alumina ceramic tube of round steel overcoat, and stove interior power line is drawn outside stove
Connect external cable afterwards, then the heating outfan being connected to intelligent temperature controller by external cable；The zero line of electric heater connects steel
The caged framework of structure, caged framework is connected as public zero curve with furnace shell.
5. large-scale air stove vault according to claim 1 change bulk heat treatmet system online it is characterised in that：Thermoelectricity
Even is the plainly-packed thermocouple of K-type, and thermocouple divides three layers of arrangement, and on end socket top, arrangement 3, upper strata arrange 8, middle level arrangement 12,
Lower floor arranges 10, arranges 33 thermocouples altogether.
6. large-scale air stove vault according to claim 1 change bulk heat treatmet system online it is characterised in that：Intelligence
Temperature controller is ZWK type computer temperature control instrument, and output is 360KW；Intelligent temperature controller arranges 6, is that intelligent temperature controller is powered
The peak power of portable diesel-oil electric generator wagon output is 2100kw.
7. large-scale air stove vault according to claim 1 change bulk heat treatmet system online it is characterised in that：Insulation
Layer is configured by the two-layer super glass wool being superimposed, and insulation layer thickness is 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620910912.7U CN205933926U (en) | 2016-08-22 | 2016-08-22 | Whole heat treatment system is changed on line to large -scale hot -blast furnace vault |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620910912.7U CN205933926U (en) | 2016-08-22 | 2016-08-22 | Whole heat treatment system is changed on line to large -scale hot -blast furnace vault |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086365A (en) * | 2016-08-22 | 2016-11-09 | 首钢股份公司迁安钢铁公司 | Bulk heat treatmet system changed online by large-scale air stove vault |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086365A (en) * | 2016-08-22 | 2016-11-09 | 首钢股份公司迁安钢铁公司 | Bulk heat treatmet system changed online by large-scale air stove vault |
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