CN1074049C - Air flow controller - Google Patents
Air flow controller Download PDFInfo
- Publication number
- CN1074049C CN1074049C CN97108774A CN97108774A CN1074049C CN 1074049 C CN1074049 C CN 1074049C CN 97108774 A CN97108774 A CN 97108774A CN 97108774 A CN97108774 A CN 97108774A CN 1074049 C CN1074049 C CN 1074049C
- Authority
- CN
- China
- Prior art keywords
- gas
- furnace
- air
- stove
- heating zone
- 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 - Fee Related
Links
- 239000002184 metal Substances 0.000 claims description 16
- 230000003068 static effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 41
- 238000004880 explosion Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 39
- 238000004320 controlled atmosphere Methods 0.000 description 20
- 238000001816 cooling Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/63—Continuous furnaces for strip or wire the strip being supported by a cushion of gas
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
Abstract
In a strip continuous heat treatment furnace, gas flow in a furnace in the longitudinal direction of the furnace is controlled, to improve quality of heat treatment, to save consumption of atmospheric gas, to eliminate danger of explosion. At both sides of a metallic strip 6 shifted in the furnace, seal device 10 for controlling the flowing of gas in the furnace in the longitudinal direction of the furnace, are arranged. Furthermore, one pair of gas pressure holding parts 18, 19 partitioned with gas curtains 16a, 16b, 17a, 17b at the front and the rear parts of the seal devices 10, respectively, are arranged. The gas in the furnace sucked from the gas pressure holding parts 18, 19 with circulating fan 20, is spouted into the furnace as the gas curtain. The gas in the furnace is made to flow in a prescribed quantity in the longitudinal direction of the furnace by adjusting the flow rate of gas in the furnace.
Description
The present invention relates in the continuous heat treating furnace of sheet metal strip in the control stove gas to the mobile device of furnace superintendent direction.
As shown in Figure 1, when for example sheet metal strip being carried out anneal continuously, use the heat treatment furnace that is provided with direct flame-type heating zone 1, controlled atmosphere heating zone 2 and cooling zone 3 continuously.Directly flame-type heating zone 1 possesses the gas fuel burning device as thermal source, and controlled atmosphere heating zone 2 possesses the radiation pipe burner as thermal source.From the bomb 4 of outside to cooling zone 3 weight feed nitrogen, from producer gas generator 5 to controlled atmosphere heating zone 2 weight feeds by the angry body of reductibility that nitrogen and hydrogen generate, sheet metal strip 6 is moved continuously to the direction of arrow.In this case, by outlet tightness systems 7,7 such as roller contact or air curtain are set respectively and prevent the outflow of gas in the stove and the inflow of extraneous gas at the inlet of direct flame-type heating zone 1 and cooling zone 3, and, between direct flame-type heating zone 1 and controlled atmosphere heating zone 2, and the moving tightness systems such as air curtain 8,8 of restriction gas stream in the stove are set also between controlled atmosphere heating zone 2 and the cooling zone 3.Supplying with the nitrogen of cooling zone 3 and the reducing gas of supply controlled atmosphere heating zone 2 discharges from venting port 9 by direct flame-type heating zone 1.
But in tightness system in the past, air pressure in air pressure in the controlled atmosphere heating zone 2 and the cooling zone 3 does not exceed certain pressure when above usually than direct flame-type heating zone 1, gas just has adverse current or also has phase blended possibility in the stove, have owing to adverse current or mixing make sheet metal strip 6 oxidations, perhaps react and the danger that sets off an explosion with oxygen.
In addition, even in tightness system 7,7 in the past, in the time can not making the stove internal gas pressure high as far as possible, owing to can not prevent the intrusion of extraneous gas effectively, the consumption of gas must increase, and influences cost.
Air flow controller of the present invention can solve the shortcoming of above-mentioned prior art, it is characterized in that, be arranged on the tightness system that a pair of plenum chamber that the both sides of the sheet metal strip that moves in the stove are oppositely arranged constitutes, the gas that blows out by spout from this plenum chamber and sheet metal strip between form high static pressure air cushion stop that gas flows to the furnace superintendent direction in the stove, and, form respectively by the isolated a pair of air pressure maintaining part of air curtain in the front and back of sealing device, make and be blown out to the spout that forms above-mentioned plenum chamber in the stove with gas and above-mentioned air curtain from gas in the stove of these air pressure maintaining parts by air-circulating fan suction, and, make by adjusting flow by the air-circulating fan suction that gas flows with specified amount in the furnace superintendent direction in the stove from gas in the stove of above-mentioned air pressure maintaining part.
Fig. 1 is the concept map of band continuous heat treating furnace.
Fig. 2 is the longitudinal diagram of relevant air flow controller of the present invention.
Fig. 3 is the cross-sectional view of Fig. 2 major portion.
Fig. 4 is the figure of expression variations in flow.
Below with reference to Fig. 2 and Fig. 3 example of the present invention is described.Fig. 2 is arranged on the direct flame-type heating zone 1 of the heat treatment furnace shown in Fig. 1 and the air flow controller between the controlled atmosphere heating zone 2 longitudinal diagram along the furnace superintendent direction.Fig. 3 is its cross-sectional view.In Fig. 2 and Fig. 3, Reference numeral 10 is a pair of plenum chamber 10a that are oppositely arranged by in sheet metal strip 6 both sides, the tightness system that 10b constitutes, plenum chamber 10a, 10b is provided with intilted spout 12 at two end edge portion places of the leveling board face 11 relative with sheet metal strip 6,12, from spout 12,12 form the air cushion 13 of high static pressure to the gas that sheet metal strip 6 blows out between the surface of leveling board face 11 and sheet metal strip 6,13, it is supported that air cushion 13,13 makes the load of sheet metal strip 6 be in suspended state, stops gas flowing to the furnace superintendent direction in the stove simultaneously as far as possible.
In addition, at the place ahead and the rear of tightness system 10, the interval that separates regulation in the both sides of sheet metal strip 6 inwardly is provided with relative spout 14a, 14b and 15a, 15b.The gas that blows out from these spouts forms air curtain 16a, 16b and 17a, and 17b passes through these air curtains and isolated air pressure maintaining part 18,19 in the formation of the front and back of tightness system 10.
Like this, adjust the flow of gas in the stove of being extracted out from air pressure maintaining part 18,19 respectively by the aperture of regulating air register 23 and air register 24, just can control the air pressure of two air pressure maintaining parts 18,19 freely.Therefore, the aperture of the air register 23 by making a side diminishes, it is big that the aperture of the air register 24 of opposite side becomes, and just can be adjusted to air pressure P2 height than the air pressure maintaining part 19 of opposite side to the air pressure P1 of the air pressure maintaining part 18 of a side, at this moment, the reducing gas that contains hydrogen of controlled atmosphere heating zone 2 just flows into air pressure maintaining part 19 lentamente, and the gas of this inflow is pressed to spout 12,14a, 14b by air-circulating fan 20 suctions, 15a is among the 15b.In addition, aspirate though the gas of air pressure maintaining part 18 is recycled fan 20, its part flows out to direct flame-type heating zone 1 lentamente.Promptly, because air cushion 13,13 gases that produced cut off energy force rate air curtain 16a, 16b, 17a, it is high that the gas partition ability that 17b produced is wanted, so when establishing P1＞P2 as mentioned above, reducing gas can only flow into air pressure maintaining part 19 from controlled atmosphere heating zone 2, and that a part of gas can flow out to direct flame-type heating zone 1 from 18 of air pressure maintaining parts.
Fig. 4 show the draught head (P1-P2) that is illustrated in two air pressure maintaining parts 18,19 in Fig. 2 and the device shown in Figure 3 and from controlled atmosphere heating zone 2 to the figure of the relation of direct flame-type heating zone 1 airflow flowing amount.Can judge that in view of the above above-mentioned pressure reduction is big more, airshed increases more.Therefore, according to the amount of producer gas generator shown in Figure 15 to the reducing gas of controlled atmosphere heating zone 2 supplies, by determining these two air pressure maintaining parts 18, poor (P1-P2) of 19 air pressure just can control often from controlled atmosphere heating zone 2 to the gas of direct flame-type heating zone 1 mobile specified amount.During this time, because the air pressure that can set air pressure maintaining part 18 for is than direct flame-type heating zone 1 height, and the air pressure of air pressure maintaining part 19 is lower than the air pressure of controlled atmosphere heating zone 2, so can prevent that gas is from direct flame-type heating zone 1 adverse current to controlled atmosphere heating zone 2 in the stove.
Mix owing to can prevent gas and the gas in the controlled atmosphere heating zone in the direct flame-type heating zone,, can seek to improve the quality of converted products so can prevent the oxidation of the sheet metal strip in the controlled atmosphere heating zone.In addition and since can prevent controlled atmosphere the heating zone in hydrogen and directly the oxygen in the flame-type heating zone react, can prevent the blast of hydrogen, can carry out safety operation.
This air flow controller is not only between direct flame-type heating zone 1 shown in this example and controlled atmosphere heating zone 2, between controlled atmosphere heating zone 2 and cooling zone 3, or the inlet of direct flame-type heating zone 1, the outlet of cooling zone 3 etc. are located also can be provided with.
In addition, in this example, only to by the plenum chamber 10a as tightness system, 10b forms air cushion 13,13 are illustrated, but also can use a pair of revolving roll to contact with the two sides of sheet metal strip 6 and the tightness system of the contact of air seal.
According to air flow controller of the present invention, have the invalid outflow that can prevent gas in the stove, move, reduce the beneficial effect of gas consumption, effect in possible trouble in addition prevents to explode.
Claims (1)
1. air flow controller, it is characterized in that, be arranged on the tightness system that a pair of plenum chamber that the both sides of the sheet metal strip that moves in the stove are oppositely arranged constitutes, the gas that blows out by spout from this plenum chamber and sheet metal strip between form high static pressure air cushion stop that gas flows to the furnace superintendent direction in the stove, and, form respectively by the isolated a pair of air pressure maintaining part of air curtain in the front and back of sealing device, make and be blown out to the spout that forms above-mentioned plenum chamber in the stove with gas and above-mentioned air curtain from gas in the stove of these air pressure maintaining parts by air-circulating fan suction, and, make by adjusting flow by the air-circulating fan suction that gas flows with specified amount in the furnace superintendent direction in the stove from gas in the stove of above-mentioned air pressure maintaining part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35604296A JP4000612B2 (en) | 1996-12-24 | 1996-12-24 | Gas flow control device |
| JP356042/1996 | 1996-12-24 | ||
| JP356042/96 | 1996-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1190675A CN1190675A (en) | 1998-08-19 |
| CN1074049C true CN1074049C (en) | 2001-10-31 |
Family
ID=18447035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97108774A Expired - Fee Related CN1074049C (en) | 1996-12-24 | 1997-12-20 | Air flow controller |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4000612B2 (en) |
| KR (1) | KR19980063545A (en) |
| CN (1) | CN1074049C (en) |
| TW (1) | TW430690B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210775B (en) * | 2007-12-21 | 2012-07-04 | 湖南华联瓷业股份有限公司 | Method and device for pre-cooling domestic roller-way kiln |
| JP5663186B2 (en) * | 2010-03-31 | 2015-02-04 | 光洋サーモシステム株式会社 | Carburizing equipment |
| JP2013047357A (en) * | 2011-08-29 | 2013-03-07 | Daido Steel Co Ltd | Gas seal device for heat treatment furnace |
| CN102363834A (en) * | 2011-11-22 | 2012-02-29 | 武汉钢铁(集团)公司 | Gas seal device for multi-hearth heat treatment furnace |
| JP6518943B2 (en) * | 2015-12-09 | 2019-05-29 | Ｊｆｅスチール株式会社 | Sealing apparatus and sealing method in continuous annealing furnace |
| JP6261662B2 (en) * | 2016-06-28 | 2018-01-17 | 中外炉工業株式会社 | Processing furnace |
| JP2020041737A (en) * | 2018-09-10 | 2020-03-19 | 光洋サーモシステム株式会社 | Heat treatment device |
| CN111519005B (en) * | 2020-04-14 | 2021-12-10 | 中国科学院合肥物质科学研究院 | Large D-shaped Nb3Sn superconducting coil heat treatment equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1117313A (en) * | 1993-12-15 | 1996-02-21 | 日新制钢株式会社 | Sealing device for area entrances and exits of continuous annealing furnaces, continuous coating equipment, etc. |
-
1996
- 1996-12-24 JP JP35604296A patent/JP4000612B2/en not_active Expired - Fee Related
-
1997
- 1997-10-24 KR KR1019970054944A patent/KR19980063545A/en not_active Ceased
- 1997-11-11 TW TW086116791A patent/TW430690B/en not_active IP Right Cessation
- 1997-12-20 CN CN97108774A patent/CN1074049C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1117313A (en) * | 1993-12-15 | 1996-02-21 | 日新制钢株式会社 | Sealing device for area entrances and exits of continuous annealing furnaces, continuous coating equipment, etc. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1190675A (en) | 1998-08-19 |
| TW430690B (en) | 2001-04-21 |
| JP4000612B2 (en) | 2007-10-31 |
| JPH10183258A (en) | 1998-07-14 |
| KR19980063545A (en) | 1998-10-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |