CN103014309A - 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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- CN103014309A CN103014309A CN2012105144062A CN201210514406A CN103014309A CN 103014309 A CN103014309 A CN 103014309A CN 2012105144062 A CN2012105144062 A CN 2012105144062A CN 201210514406 A CN201210514406 A CN 201210514406A CN 103014309 A CN103014309 A CN 103014309A
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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 the cold-rolled steel strip continuous annealing stove.
Background technology
In the cold rolled strip annealing furnace; for obtaining higher rate of cooling; in the cooling of jetting of fast cold section nitrogen hydrogen protection gas that utilizes high hydrogen richness; particularly in the large-scale vertical annealing furnace; strip speed is fast; for reaching rate of cooling, density of hydrogen has reached 50% in the protection gas that some annealing furnaces are fast cold section.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, reduce running cost with the consumption that reduces hydrogen; Simultaneously, prevent that high hydrogen from leaking into the danger that brings to operator in the surrounding environment of air channel.On the other hand, to prevent that more outside air from entering in the air channel, causing the risk of gaseous detonation in the air channel from the pipe leakage point.
At present, the high hydrogen concentration gas safety commonly used comprehensive means such as monitoring, density of hydrogen detection alarm instrument that mainly make-up gas is injected flow in the monitoring by the air channel internal pressure, the 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 reduces 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 the circulation air path, and excluding air is inhaled into the cooling blasting device that is used for the 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 the technical scheme of taking to be:
The cooling blasting device that is used for the 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 the recirculation blower preceding pipeline with the import of described recirculation blower, the outlet of described recirculation blower is connected by the interior winding-up cool wind box of high hydrogen protection gas flow in pipes and annealing furnace body of heater, 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 the entrance, the flow direction of gas is the Way in that is exported to recirculation blower from recirculation blower in the described anti-negative-pressure pipeline.
In the such scheme, described protection gas is extracted out on the pipeline and is provided with volume control damper.
In the such scheme, be provided with anti-negative-pressure pipeline variable valve on the described anti-negative-pressure pipeline.
In the such scheme, described cooling blasting device also is provided with the gassing pipe that connects bearing seal place of described recirculation blower.
In the such scheme, described water cooling heat exchanger and recirculation blower are connected on the pipeline by flange welding.
Compared with prior art, the beneficial effect that the present invention obtains is: by the use of this device, cooperate some measuring instruments again, will reduce to greatest extent the leakage of high hydrogen concentration gas, reduce consuming cost saving; Guarantee circulation air path personnel operation safety on every side; Reduce air and enter chance in the air channel, increase the security of high hydrogen in the circulation air path.
Description of drawings
The structural representation of the cooling blasting device that is used for the cold-rolled steel strip continuous annealing stove that Fig. 1 provides for the embodiment of the invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples, 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 the 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 by high hydrogen protection gas flow in pipes 3 and annealing furnace body of heater 10 interior winding-up cool wind box 11.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 the pipeline 4 and is provided with volume control damper 5.Be provided with anti-negative-pressure pipeline 7 between the outlet of recirculation blower 2 and the entrance, the flow direction of gas is the Way in that is exported to recirculation blower 2 from recirculation blower 2 in the anti-negative-pressure pipeline 7.Be provided with anti-negative-pressure pipeline variable valve 8 on the anti-negative-pressure pipeline 7.This cooling blasting device also is 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:
Enter recirculation blower 2 through the cooled high hydrogen shielding gas of water cooling heat exchanger 6 heat exchange through recirculation blower preceding pipeline 1; the winding-up cool wind box 11 that recirculation blower 2 is blown into high hydrogen protection gas in the body of heater 10 by high hydrogen protection gas flow in pipes 3; winding-up reaches the effect of quick cooling zone steel to belt steel surface.Gas behind the cooling zone steel is extracted pipeline 4 out from body of heater 10 interior extractions through protection gas, goes forward side by side into water cooling heat exchanger 6, behind the water for cooling that is cooled, again blasts in the winding-up cool wind box 11 by recirculation blower 2, and high hydrogen protection gas like this is at the air channel internal recycle.
According to the demand of rate of cooling, the open degree of volume control damper 5 cooperates the rotating speed acting in conjunction of recirculation blower 2, to regulate cold blast rate.Water cooling heat exchanger 6, recirculation blower 2, and the equipment of the connecting tube such as volume control damper 5 all be connected on the pipeline by flange welding, to reduce to greatest extent leakage point.After the pipeline welding connection is finished, permeate detection to each weld seam, guarantee the resistance to air loss of weld seam.Gassing pipe 9 uses nitrogen to jet, and this pipeline 9 is connected recirculation blower 2 bearing seals place, and the bearing seal position is purged and supercharging, reduces the leakage of fan bearing position, prevents that simultaneously air from entering in the air channel from bearing seal.For preventing that recirculation blower 2 is when the high speed rotating, produce large Negative Pressure Difference in the air inlet position because of the blower fan suction, use anti-negative-pressure pipeline 7 that the portion gas of blower fan 2 outlets is withdrawn into blower fan ingress, play from supercharging, enter danger air channel in because negative pressure causes air from this position leakage point to reduce blower fan 2 ingresss.Variable valve 8 is set on the anti-negative-pressure pipeline 7 can be regulated the gas volume of drawing back of anti-negative pressure.
By this cooling blasting device, cooperate again the monitoring of the instrument such as pressure, flow, density of hydrogen warning, will improve greatly the safety precaution to high hydrogen circulation air path, the leakage of minimizing hydrogen.
Need to prove that those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. the cooling blasting device that is used for the 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 the recirculation blower preceding pipeline with the import of described recirculation blower, the outlet of described recirculation blower is connected by the interior winding-up cool wind box of high hydrogen protection gas flow in pipes and annealing furnace body of heater, 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 the entrance, the flow direction of gas is the Way in that is exported to recirculation blower from recirculation blower in the described anti-negative-pressure pipeline.
2. cooling blasting device as claimed in claim 1 is characterized in that, described protection gas is extracted out on the 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 the described anti-negative-pressure pipeline.
4. cooling blasting device as claimed in claim 1 is characterized in that, described cooling blasting device also is 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 the 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 |
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| CN103014309A true CN103014309A (en) | 2013-04-03 |
| CN103014309B 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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Cited By (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 |
| CN107746928A (en) * | 2017-11-21 | 2018-03-02 | 上海信鹏印刷器材有限公司 | Die-cutting rule steel band continuous refining device and method |
| 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 |
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| 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 |
Cited By (4)
| 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 |
| CN107746928A (en) * | 2017-11-21 | 2018-03-02 | 上海信鹏印刷器材有限公司 | Die-cutting rule steel band continuous refining device and method |
| 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 |
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| CN103014309B (en) | 2014-08-06 |
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