CN103014309B - Cooling air supply device for cold-strip steel continuous annealing furnace - Google Patents
Cooling air supply device for cold-strip steel continuous annealing furnace Download PDFInfo
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- CN103014309B CN103014309B CN201210514406.2A CN201210514406A CN103014309B CN 103014309 B CN103014309 B CN 103014309B CN 201210514406 A CN201210514406 A CN 201210514406A CN 103014309 B CN103014309 B CN 103014309B
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- pipeline
- recirculation blower
- annealing furnace
- heat exchanger
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Abstract
The invention provides a cooling air supply device for a cold-strip steel continuous annealing furnace. The cooling air supply device for the cold-strip steel continuous annealing furnace comprises a water cooled heat exchanger, and a circulating fan, wherein the outlet of the water cooled heat exchanger is connected with the inlet of the circulating fan through a front pipeline of the circulating fan; the outlet of the circulating fan is connected with a blowing cooling bellow inside the annealing furnace body through a high-hydrogen protective gas injection pipeline; the inlet of the water-cooled heat exchanger is connected with an exhaust port of the annealing furnace body through a protective gas extracting pipeline; a negative pressure-proof pipeline is arranged between the outlet and the inlet of the circulating fan; and the flow direction of the gas in the negative pressure-proof pipeline is the direction from the outlet of the circulating fan to the inlet of the circulating fan. By using the device, leakage of high-hydrogen concentration gas is reduced to the maximal extent by matching with a few of detecting instruments; energy consumption is reduced; expenses are saved; the operational safety of personnel around a circulating air duct is ensured; the chance that the air enters inside the air duct is reduced; and the security of high-hydrogen gas inside the circulating air duct is increased.
Description
Technical field
The invention belongs to cold-rolled steel strip continuous annealing stove technical field, relate in particular to a kind of cooling blasting device for cold-rolled steel strip continuous annealing stove.
Background technology
In cold rolled strip annealing furnace; for obtaining higher rate of cooling; in rapid cooling section, utilize the nitrogen hydrogen protection gas of high hydrogen richness to jet cooling; particularly in large-scale vertical annealing furnace; strip speed is fast; for reaching rate of cooling, in the protection gas of some annealing furnace rapid cooling sections, density of hydrogen has reached 50%.When density of hydrogen improves, brought the requirement to circulation air path resistance to air loss and anti-leak, on the one hand, reduce the leakage of high hydrogen protection gas as far as possible, to reduce the consumption of hydrogen, reduce running cost; Meanwhile, prevent that high hydrogen from leaking into the danger bringing to operator in the surrounding environment of air channel.On the other hand, more to prevent that outside air from entering in air channel, causing the risk of gaseous detonation in air channel from pipe leakage point.
At present, the conventional high hydrogen concentration gas safety comprehensive means such as monitoring, density of hydrogen detection alarm instrument that mainly make-up gas is injected flow in the monitoring by air channel internal pressure, air channel have judged whether to leak and reminding alarm.But the reliability of instrument has certain risk in different occasions and time, how to improve air channel structure and reduce leakage point or increase to leak security measures, to reduce, the dependency degree of instrument is considered to have higher requirement to design.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of and reduce high hydrogen concentration gas leakage in circulation air path, and excluding air is inhaled into the cooling blasting device for cold-rolled steel strip continuous annealing stove of circulation air path potential safety hazard.
The present invention solves the problems of the technologies described above taked technical scheme to be:
Cooling blasting device for cold-rolled steel strip continuous annealing stove, it comprises water cooling heat exchanger and recirculation blower, the outlet of described water cooling heat exchanger is connected by recirculation blower preceding pipeline with the import of described recirculation blower, the outlet of described recirculation blower is connected with the winding-up cool wind box in annealing furnace body of heater by high hydrogen protection gas flow in pipes, and the import of described water cooling heat exchanger is extracted pipeline out by protection gas and is connected with the venting port of annealing furnace body of heater; It is characterized in that, be provided with anti-negative-pressure pipeline between the outlet of described recirculation blower and entrance, in described anti-negative-pressure pipeline, the flow direction of gas is the Way in that is exported to recirculation blower from recirculation blower.
In such scheme, described protection gas is extracted out on pipeline and is provided with volume control damper.
In such scheme, on described anti-negative-pressure pipeline, be provided with anti-negative-pressure pipeline variable valve.
In such scheme, described cooling blasting device is also provided with the gassing pipe that connects bearing seal place of described recirculation blower.
In such scheme, described water cooling heat exchanger and recirculation blower are connected on pipeline by flange welding.
Compared with prior art, the beneficial effect that the present invention obtains is: by the use of this device, then coordinate some measuring instruments, will reduce to greatest extent the leakage of high hydrogen concentration gas, reduce and consume, cost saving; Guarantee circulation air path personnel's operational safety around; Reduce air and enter the chance in air channel, increase the security of high hydrogen in circulation air path.
Accompanying drawing explanation
The structural representation of the cooling blasting device for cold-rolled steel strip continuous annealing stove that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and certain following embodiment should not be construed as limitation of the present invention.
As shown in Figure 1, the invention provides a kind of cooling blasting device for cold-rolled steel strip continuous annealing stove, it comprises water cooling heat exchanger 6 and recirculation blower 2.The outlet of water cooling heat exchanger 6 is connected by recirculation blower preceding pipeline 1 with the import of recirculation blower 2.The outlet of recirculation blower 2 is connected with the winding-up cool wind box 11 in annealing furnace body of heater 10 by high hydrogen protection gas flow in pipes 3.The import of water cooling heat exchanger 6 is extracted pipeline 4 out by protection gas and is connected with the venting port of annealing furnace body of heater 10.Protection gas is extracted out on pipeline 4 and is provided with volume control damper 5.Between the outlet of recirculation blower 2 and entrance, be provided with anti-negative-pressure pipeline 7, in anti-negative-pressure pipeline 7, the flow direction of gas is the Way in that is exported to recirculation blower 2 from recirculation blower 2.On anti-negative-pressure pipeline 7, be provided with anti-negative-pressure pipeline variable valve 8.This cooling blasting device is also provided with the gassing pipe 9 that connects recirculation blower 2 bearing seals place.
The working process of this cooling blasting device is as follows:
Through the cooled high hydrogen shielding gas of water cooling heat exchanger 6 heat exchange, through recirculation blower preceding pipeline 1, enter recirculation blower 2; the winding-up cool wind box 11 that recirculation blower 2 is blown into high hydrogen protection gas in body of heater 10 by high hydrogen protection gas flow in pipes 3; winding-up, to belt steel surface, reaches the effect of quick cooling zone steel.Gas after cooling zone steel is extracted pipeline 4 out from the interior extraction of body of heater 10 through protection gas, and enters water cooling heat exchanger 6, is cooled after water for cooling, again by recirculation blower 2, blasts in winding-up cool wind box 11, and high hydrogen protection gas like this is at air channel internal recycle.
According to the demand of rate of cooling, the open degree of volume control damper 5 coordinates the rotating speed acting in conjunction of recirculation blower 2, to regulate cold blast rate.The equipment of the connecting tubes such as water cooling heat exchanger 6, recirculation blower 2 and volume control damper 5 is all connected on pipeline by flange welding, to reduce to greatest extent leakage point.After pipeline welding has connected, permeate detection to each weld seam, guarantee the resistance to air loss of weld seam.Gassing pipe 9 is used nitrogen to jet, and this pipeline 9 is connected to recirculation blower 2 bearing seals place, and bearing seal position is purged and supercharging, reduces the leakage of fan bearing position, prevents that air from entering in air channel from bearing seal simultaneously.For preventing that recirculation blower 2 is when the high speed rotating, in air inlet position, because aspirating, blower fan produces large Negative Pressure Difference, use anti-negative-pressure pipeline 7 that the portion gas of blower fan 2 outlets is withdrawn into blower fan ingress, play from supercharging, to reduce blower fan 2 ingresss, because negative pressure causes air, from this position leakage point, enter the danger in air channel.Variable valve 8 is set on anti-negative-pressure pipeline 7 can be regulated the gas volume of drawing back of anti-negative pressure.
By this cooling blasting device, then coordinate the monitoring of the instrument such as pressure, flow, density of hydrogen warning, will improve greatly the safety precaution of high hydrogen circulation air path, reduce the leakage of hydrogen.
It should be noted that, those of ordinary skill in the art should be appreciated that and can modify or be equal to replacement technical scheme of the present invention, and do not depart from aim and the scope of technical solution of the present invention, and it all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. for the cooling blasting device of cold-rolled steel strip continuous annealing stove, it comprises water cooling heat exchanger and recirculation blower, the outlet of described water cooling heat exchanger is connected by recirculation blower preceding pipeline with the import of described recirculation blower, the outlet of described recirculation blower is connected with the winding-up cool wind box in annealing furnace body of heater by high hydrogen protection gas flow in pipes, and the import of described water cooling heat exchanger is extracted pipeline out by protection gas and is connected with the venting port of annealing furnace body of heater; It is characterized in that, be provided with anti-negative-pressure pipeline between the outlet of described recirculation blower and entrance, in described anti-negative-pressure pipeline, the flow direction of gas is the Way in that is exported to recirculation blower from recirculation blower.
2. cooling blasting device as claimed in claim 1, is characterized in that, described protection gas is extracted out on pipeline and is provided with volume control damper.
3. cooling blasting device as claimed in claim 1, is characterized in that, is provided with anti-negative-pressure pipeline variable valve on described anti-negative-pressure pipeline.
4. cooling blasting device as claimed in claim 1, is characterized in that, described cooling blasting device is also provided with the gassing pipe that connects bearing seal place of described recirculation blower.
5. cooling blasting device as claimed in claim 1, is characterized in that, described water cooling heat exchanger and recirculation blower are connected on pipeline by flange welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210514406.2A CN103014309B (en) | 2012-12-05 | 2012-12-05 | Cooling air supply device for cold-strip steel continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210514406.2A CN103014309B (en) | 2012-12-05 | 2012-12-05 | Cooling air supply device for cold-strip steel continuous annealing furnace |
Publications (2)
| Publication Number | Publication Date |
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| CN103014309A CN103014309A (en) | 2013-04-03 |
| CN103014309B true CN103014309B (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210514406.2A Expired - Fee Related CN103014309B (en) | 2012-12-05 | 2012-12-05 | Cooling air supply device for cold-strip steel continuous annealing furnace |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651599A (en) * | 2015-03-17 | 2015-05-27 | 中冶南方(武汉)威仕工业炉有限公司 | Spray box device for inhibiting vibration of strip steel in gas cooling process |
| CN107746928B (en) * | 2017-11-21 | 2024-04-12 | 上海信鹏印刷器材有限公司 | Continuous tempering device and method for die-cutting knife steel belt |
| CN112129914A (en) * | 2019-06-24 | 2020-12-25 | 上海宝信软件股份有限公司 | Rapid cooling device of strip steel heat treatment process simulation experiment device and working method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286729A (en) * | 1998-03-26 | 2001-03-07 | 川崎制铁株式会社 | Continuous heat treatment furnace and atmosphere control method and cooling method in continuous heat treatment furnace |
| CN1704486A (en) * | 2004-05-31 | 2005-12-07 | 株式会社神户制钢所 | Gas jet cooling device |
| CN1705759A (en) * | 2002-09-27 | 2005-12-07 | 新日本制铁株式会社 | Cooling device for steel strip |
| CN202989243U (en) * | 2012-12-05 | 2013-06-12 | 中冶南方(武汉)威仕工业炉有限公司 | Cooling air supply device used for cold-strip steel continuous annealing furnace |
-
2012
- 2012-12-05 CN CN201210514406.2A patent/CN103014309B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286729A (en) * | 1998-03-26 | 2001-03-07 | 川崎制铁株式会社 | Continuous heat treatment furnace and atmosphere control method and cooling method in continuous heat treatment furnace |
| CN1705759A (en) * | 2002-09-27 | 2005-12-07 | 新日本制铁株式会社 | Cooling device for steel strip |
| CN1704486A (en) * | 2004-05-31 | 2005-12-07 | 株式会社神户制钢所 | Gas jet cooling device |
| CN202989243U (en) * | 2012-12-05 | 2013-06-12 | 中冶南方(武汉)威仕工业炉有限公司 | Cooling air supply device used for cold-strip steel continuous annealing furnace |
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| CN103014309A (en) | 2013-04-03 |
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