CN104250678A - Slow-cooling section device of horizontal annealing furnace radiation cooling system and control method thereof - Google Patents
Slow-cooling section device of horizontal annealing furnace radiation cooling system and control method thereof Download PDFInfo
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- CN104250678A CN104250678A CN201310257345.0A CN201310257345A CN104250678A CN 104250678 A CN104250678 A CN 104250678A CN 201310257345 A CN201310257345 A CN 201310257345A CN 104250678 A CN104250678 A CN 104250678A
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Abstract
The invention discloses a slow-cooling section device of a horizontal annealing furnace radiation cooling system and a control method thereof. The slow-cooling section device comprises 4-8 sections. Each one of the sections is provided with an air flow control valve (3) and a temperature detector, and when the temperature detector detects a temperature in a furnace, a feedback controller (11) adjusts the air flow control valve (3) according to the information. In each one of the sections, radiation casing pipes (2) are crosswisely arranged respectively above and below strip steel, the strip steel is cooled by radiation of cold air in the radiation casing pipes, the air flow control valves (3) for connecting all the sections are connected to an exhaust fan (5) by air pipes (4), and then gas is discharged by an exhaust chimney (6). According to the device, the slow-cooling section production processes can be set according to an original object temperature, and according to a real temperature in a hearth, gas flows in the radiation cooling pipes can be automatically adjusted with hearth temperature demand change. The control method is simple, has good operationality and is convenient for daily maintenance.
Description
Technical field
The present invention relates to metallurgical heat-treatment of annealing field, especially, relate to Horizental annealer radiation cooling system slow cooling section device and control method thereof that the annealing of cold rolling tandem mill needs the continuous annealing production line of Slow cooling.
Background technology
In heat-treatment of annealing technique, generally all there is the production technique such as heating zone, soaking zone, slow cooling section, rapid cooling section and air cooling section; The hot drawing annealing unit of certain iron and steel enterprise's share silicon steel portion oriented silicon steel first phase have employed above-mentioned technique too.Product is in enforcement annealing process, and there is vital effect slow cooling section, and the plate shape impact of slow cooling speed on belt steel surface is very large.The method of cooling that the slow cooling section of certain iron and steel enterprise's oriented silicon steel first phase hot drawing annealing unit adopts is that bellows purge cooling, as shown in Fig. 1 steel enterprise orientation first phase annealing furnace slow cooling schematic diagram.
As shown in Figure 1, in annealing furnace, band steel adopts upper and lower bellows purging to cool in annealing process, adopts this method to cool, all has certain negative impact to the control of product plate shape and the control of annealing furnace furnace pressure:
1) cool wind box is arranged in the upper and lower surface of band steel, adopts the method purging cooling, is unfavorable for being with the homogeneity of steel when cooling, and is equally also unfavorable for improving plate shape.
2) method of cooling that belt steel surface is directly purged is adopted, be unfavorable for the relatively stable of annealing furnace furnace pressure, if carry out dynamic adjustments to cooling air quantity, the easy vibration of atmosphere between each section in stove, cannot reach the stability contorting of each section of atmosphere in annealing furnace.
3) bellows cooling is adopted, must carry out the configuration of relevant device to each bellows, each bellows must configure a recirculation blower, then configure a heat exchanger, thus add equipment structure input, and to maintenance from now on and maintenance also very unfavorable.
Open (bulletin) number is " CN102016410A ", denomination of invention is that " topcoating of radiation cooling " patent discloses a kind of technical scheme, by providing a kind of topcoating to containing adding microballoon in the composition of solar reflective pigment, this topcoating has the low sun and absorbs, and in infrared region to correspond to the wavelength preferential emission of atmospheric window.But this radiation cools the drying be mainly used in coating, does not have cognation with heat-treatment of annealing technique.
Denomination of invention is a kind of assembling radiant coolers 57 for " radiant coolers and assembly method thereof " patent discloses, and comprise, provide vessel shell 100, this vessel shell 100 comprises the gas channel roughly extending axially through vessel shell be defined in wherein; Multiple cooling tube 124 and multiple downtake 150 are linked together to form pipe cage 120, it is adjacent and between the downtake separated that at least one wherein in multiple cooling tube is circumferentially positioned at a pair circumference; And in vessel shell, pipe cage is oriented so that pipe cage is communicated with circulation road stream.Described method comprises: provide vessel shell, and described vessel shell comprises the gas channel roughly extending axially through described vessel shell be defined in described vessel shell; Multiple cooling tube and multiple downtake are linked together to form pipe cage, wherein, it is adjacent and between the downtake separated that at least one in described multiple cooling tube is circumferentially positioned at a pair circumference; And in described vessel shell, described pipe cage is oriented so that described pipe cage is communicated with described circulation road stream.
But what this art solutions was set forth is a kind of assemble method of radiant coolers, and the structure of this radiant coolers and this problem radiant coolers and thorough fare do not have dependency.
Open (bulletin) number is " CN1560522 ", denomination of invention patent discloses a kind of displacement ventilation radiator for " displacement ventilation radiator ", belongs to HVAC & R field.The present invention includes radiator, permutation ventilator two portions, radiator is arranged on the wooden partition of the indoor side of permutation ventilator, and the base plate using the wooden partition of permutation ventilator as it, radiator and permutation ventilator lean against and be set together privately.Have the feature of replacement aeration and radiation cooling heating technique concurrently, new wind can not only be carried in replacement aeration mode to room, remove indoor humidity load, meet the fresh air needs of personnel; Also by radiator room cooled or heat, bearing indoor aobvious cold or sensible heat load, improve thermal comfort level and the air quality of indoor, save air conditioning energy consumption and space.And apparatus of the present invention directly use the refrigerated water of usual design temperature 7 DEG C, the structure of device itself can ensure that radiator surface no longer condenses.
But this patent is mainly used in factory building dehumidifying, pre-antisweat, and its structure does not associate with this problem with using method.
Summary of the invention
For this reason, this area needs a kind of annealing furnace radiation cooling system slow cooling section device and control method, to improve the stability of continuous annealing unit slow cooling section technique, avoid the drawback produced when directly purging cooling, simultaneously, can stablize and improve plate shape and stable furnace pressure, the stability contorting for unit continuous seepage and quality product serves the effect of guarantee.
For overcoming the problems referred to above, the object of the invention is, a kind of annealing furnace radiation cooling system slow cooling section device and control method are provided, according to described a kind of annealing furnace radiation cooling system and control method, oriented silicon steel continuous annealing unit in process of production, the adverse consequences that the method for cooling adopting " annealing furnace radiation cooling system and control method " that the slow cooling section in annealing furnace can be avoided directly to purge band steel is brought, by the reasonable Arrangement of radiator tube, can carry out evenly cooling slowly to the upper and lower surface of band steel; Meanwhile, adopt the Temperature Feedback in burner hearth, make cooling air delivery and temperature in radiator tube control interlocking and realize closed-loop control, this control method stabilizes the fire box temperature in annealing furnace and the rate of cooling to band steel, has ensured the effect of Slow cooling.
According to the present invention, the production technique of slow cooling section can be set by original target temperature, according to the actual temperature in burner hearth, gas flow in radiation cooled tube regulates automatically along with the demand of fire box temperature, its control method is fairly simple, workable, and daily being convenient to is safeguarded.
The following technical scheme of technical scheme of annealing furnace radiation cooling system slow cooling section of the present invention device is as follows:
A kind of annealing furnace radiation cooling system slow cooling section device, is characterized in that,
A kind of annealing furnace radiation cooling system slow cooling section device, is characterized in that,
Described slow cooling section device is set to 4--8 section, and each section arranges an air flow control valve 3 and temperature monitor respectively, and when temperature monitor detects in-furnace temperature, information regulates air flow rate adjustment valve by feedback controller 11;
Each section, all at the upper and lower arranged crosswise radiation sleeve pipe 2 of band steel, carries out cooling down by the freezing air radiation in radiation sleeve pipe to band steel,
The flow control valve 3 connecting each section is connected to after vacuum fan 5 through air line 4 is discharged by gas shaft 6.
Wherein, stove (1): the slow cooling section only representing annealing furnace in this programme.
Chimney (6): be that irradiated waste gas is discharged by air line (4) by vacuum fan outside factory building, avoid the envrionment temperature affecting on-site.
Vacuum fan (5): be the driving original paper that radiation process of cooling air flow moves, adopts the mode of exhausting to circulate, and warm air can be made in pipeline (4) to concentrate discharge.
Flow control valve (3): freezing air is by the flow of all radiation sleeve pipes for controlling in each section, and final purpose controls the temperature in burner hearth, guarantees the cooling temperature to band steel and rate of cooling.
Temperature monitor (7,8,9,10): be the actual furnace temperature detecting each section in stove.
Feedback controller (11): the in-furnace temperature detected and set(ting)value are compared, controls by programed interlocking instruction flow control valve being sent to adjustment.
According to a kind of annealing furnace radiation cooling system slow cooling section of the present invention device, it is characterized in that,
The flow control valve 3 connecting each section is connected to after vacuum fan 5 through air line 4 is discharged by gas shaft 6.
According to a kind of annealing furnace radiation cooling system slow cooling section of the present invention device, it is characterized in that, described radiation sleeve pipe 2 is that a kind of top-bottom cross is arranged, adopted vacuum fan to carry out the assembled casing of radiation displacement.Be illustrated in fig. 3 shown below.
Described radiation sleeve pipe 2 is evenly reasonably arranged in annealing furnace by cooling radiator tube, and be that top-bottom cross is arranged; Adopt vacuum fan to carry out radiation displacement, and the exhausting amount of each section air line all there is battery valve automatically to control, all relevant control of its air flow quantity and fire box temperature.
According to a kind of annealing furnace radiation cooling system slow cooling section of the present invention device, it is characterized in that, all radiation sleeve pipes are all connected with air line, are provided with cold air inlet (101) in described radiation sleeve pipe 2, arrange an air outlet 103 on the top of inner sleeve.
According to a kind of annealing furnace radiation cooling system slow cooling section of the present invention device, it is characterized in that, described slow cooling section device 1 arranges four sections.
According to a kind of annealing furnace radiation cooling system slow cooling section of the present invention device, it is characterized in that, the described radiation sleeve pipe that cools up and down controls at 50MM--150MM with the spacing of band steel.
A kind of annealing furnace radiation cooling system slow cooling section control method, is characterized in that,
Annealing furnace radiation cooling system slow cooling section device is set, described slow cooling section device 1 is set to 4-8 section, each section arranges an air flow control valve 3, each stove district set temperature detector respectively of slow cooling section, when temperature monitor detects in-furnace temperature, information is regulated air flow rate adjustment valve by feedback controller 11; Each section, all at the upper and lower arranged crosswise radiation sleeve pipe 2 of band steel, carries out cooling down by freezing air radiation in radiation sleeve pipe to band steel.
According to a kind of annealing furnace radiation cooling system slow cooling section of the present invention control method, it is characterized in that,
Described radiation sleeve pipe 2 is that a kind of top-bottom cross is arranged, adopted vacuum fan to carry out the assembled casing of radiation displacement,
The exhausting amount of each section air line controls automatically by battery valve, to associate control air flow quantity with fire box temperature.
According to described a kind of annealing furnace radiation cooling system slow cooling section of the present invention control method, it is characterized in that, all radiation sleeve pipes are all connected with air line, are provided with cold air inlet (101) in described radiation sleeve pipe 2, arrange an air outlet 103 on the top of inner sleeve.
According to described a kind of annealing furnace radiation cooling system slow cooling section of the present invention control method, it is characterized in that, described slow cooling section device 1 arranges four sections.
According to described a kind of annealing furnace radiation cooling system slow cooling section of the present invention control method, it is characterized in that, the described radiation sleeve pipe that cools up and down controls at 50MM--150MM with the spacing of band steel.
According to a kind of annealing furnace radiation cooling system slow cooling section of the present invention device, it is characterized in that, described radiation sleeve pipe 2 is that a kind of top-bottom cross is arranged, adopted vacuum fan to carry out radiation Permutations combination sleeve pipe.
According to the present invention, air outlet 106 is connected with the air line 4 in diagram 2, and all radiation sleeve pipes are all connected with air line, realize the flowing of gas eventually through vacuum fan, and discharges outside factory.
Inner sleeve 102 is the sleeve pipes entering freezing air, gas temperature in the process of entering will slightly rise, an air outlet 103 is set on the top of inner sleeve, can makes freezing air that the temperature of whole radiator tube in stove is reduced, thus reach the effect to the cold emission of band steel.
According to a kind of annealing furnace radiation cooling system slow cooling section of the present invention device, it is characterized in that, whole radiation cooling jacket is consistent with annealing furnace at width, and being convenient to two ends can be fixed with furnace wall.
The technical scheme of annealing furnace radiation cooling system slow cooling section of the present invention control method is as follows:
A kind of annealing furnace radiation cooling system slow cooling section control method, is characterized in that,
Annealing furnace radiation cooling system slow cooling section device is set, described slow cooling section device 1 is set to multiple section, each section arranges an air flow control valve 3, each stove district set temperature detector respectively of slow cooling section, when temperature monitor detects in-furnace temperature, information is regulated air flow rate adjustment valve by feedback controller 11; Each section, all at the upper and lower arranged crosswise radiation sleeve pipe 2 of band steel, carries out cooling down by freezing air radiation in radiation sleeve pipe to band steel.
According to the present invention, oriented silicon steel continuous annealing unit in process of production, the adverse consequences that the method for cooling adopting " annealing furnace radiation cooling system and control method " that the slow cooling section in annealing furnace can be avoided directly to purge band steel is brought, by the reasonable Arrangement of radiator tube, can carry out evenly cooling slowly to the upper and lower surface of band steel; Meanwhile, adopt the Temperature Feedback in burner hearth, make cooling air delivery and temperature in radiator tube control interlocking and realize closed-loop control, this control method stabilizes the fire box temperature in annealing furnace and the rate of cooling to band steel, has ensured the effect of Slow cooling.
According to the present invention, the production technique of slow cooling section can be set by original target temperature, according to the actual temperature in burner hearth, gas flow in radiation cooled tube regulates automatically along with the demand of fire box temperature, its control method is fairly simple, workable, and daily being convenient to is safeguarded.
As shown in Figure 2, system solution mainly contains and forms with lower component, slow cooling section 1 is set to four sections, this programme for four sections according to processing requirement, can increase the section quantity of slow cooling section, each section arranges an air flow control valve 3, and each stove district of slow cooling section sets temperature monitor 7,8,9,10 respectively, when temperature monitor detects in-furnace temperature, information is regulated air flow rate adjustment valve by feedback controller 11; Each section all arranges radiation sleeve pipe 2 at the top-bottom cross of band steel, carries out cooling down by the freezing air radiation in radiation sleeve pipe to band steel.In this system, the major function of associated components is as follows:
Chimney (6): be that irradiated waste gas is discharged by air line (4) by vacuum fan outside factory building, avoid the envrionment temperature affecting on-site.
Vacuum fan (5): be the driving original paper that radiation process of cooling air flow moves, adopts the mode of exhausting to circulate, and warm air can be made in pipeline (4) to concentrate discharge.
Flow control valve (3): freezing air is by the flow of all radiation sleeve pipes for controlling in each section, and final purpose controls the temperature in burner hearth, guarantees the cooling temperature to band steel and rate of cooling.
Temperature monitor (7,8,9,10): be the actual furnace temperature detecting each section in stove.
Feedback controller (11): the in-furnace temperature detected and set(ting)value are compared, controls by programed interlocking instruction flow control valve being sent to adjustment.
Stove (1): the slow cooling section only representing annealing furnace in this programme.
Radiation sleeve pipe (2): be a kind of assembled casing, be illustrated in fig. 3 shown below:
Cold air inlet (101) is the suction port of freezing air.
Air outlet (106) is connected with the air line (4) in diagram 2, and all radiation sleeve pipes are all connected with air line, realize the flowing of gas eventually through vacuum fan, and discharges outside factory.
Inner sleeve (102) is the sleeve pipe entering freezing air, gas temperature in the process of entering will slightly rise, an air outlet (103) is set on the top of inner sleeve, can makes freezing air that the temperature of whole radiator tube in stove is reduced, thus reach the effect to the cold emission of band steel.
Whole radiation cooling jacket is consistent with annealing furnace at width, and being convenient to two ends can be fixed with furnace wall.
Accompanying drawing explanation
The bellows that the slow cooling section that Fig. 1 is certain steel enterprise oriented silicon steel first phase hot drawing annealing unit adopts purge method of cooling.
Fig. 2 is annealing furnace slow cooling section of the present invention schematic diagram.
Fig. 3 is radiation sleeve pipe schematic diagram of the present invention.
Fig. 4 is cooling radiator tube of the present invention schematic layout pattern in stove.
In figure, 1 is (annealing furnace) slow cooling section, and 2 is radiation sleeve pipe, and 3 is air flow control valve, 4 is air line, and 5 is vacuum fan, and 6 is gas shaft, 7-10 is temperature monitor, and 11 is feedback controller, carries out cooling down by the freezing air radiation in radiation sleeve pipe to band steel.101 is cold air inlet, and 102 is inner sleeve, and inner sleeve 103 is air outlet, and 104 is outer tube, and 105 is bracing frame, and 106 is air outlet, and 107 is furnace wall.202 is band steel, and 203 is upper radiator tube, and 204 is lower radiator tube.301 is upper bellows, and 302 is overdraught, and 303 is lower bellows, and 304 is downstream.
Embodiment
Below, for embodiment, illustrate the present invention.
Embodiment 1
Enforcement control method of the present invention is:
Whole slow cooling section can be divided into 4--8 section, and each section (or two sections) can configure a vacuum fan, can according to actual needs, the blower fan of configuration different capacity.
According to cooling requirement, in each section, configure the radiation cooling jacket of some amount, and by the upper and lower surface of radiation cooled tube arranged crosswise at band steel.
Cool radiation sleeve pipe up and down to control at 50MM--150MM with the spacing of band steel.
At each section set temperature detector, air discharge duct arranges flow control valve, is regulated the air flow quantity of radiator tube by information feedback control device, thus realize the object regulating in-furnace temperature.
In stove, radiator tube is arranged as shown in Figure 4.
As shown in the figure, according to band steel in the physical location of stove interior passageway line, radiation sleeve pipe is installed respectively in the furnace wall of annealing furnace both sides, and makes sleeve pipe spaced apart up and down, be conducive to the homogeneity in process of cooling and stability.
According to the present invention, combine oriented silicon steel first phase insulating coating annealing unit improve bad the plate shape that annealing process exists and propose, by after oriented silicon steel second phase this method of cooling of 2#FCL units, the allround fastness rate of cooling of slow cooling section, also stabilizes the atmosphere content of in annealing furnace each section simultaneously.Avoiding bellows examination, directly to purge cooling be that caused inhomogeneous cooling is even, furnace pressure is unstable, template improves the consequences such as bad, for the continuous seepage of insulating coating annealing unit and the stability contorting of technique are laid a good foundation.
Air flow quantity solenoid electric valve involved in the present invention is all controlled automatically by program, and establish relevant interlocking to your actual temperature in each section in slow cooling section, when in-furnace temperature needs conversion or adjustment time, the change of state will be there is in corresponding solenoid electric valve thereupon, guaranteed the temperature in burner hearth by the change of air flow quantity, also ensure that the requirement of band steel rate of cooling equally.
Its specification of radiation cooling jacket involved in the present invention and size unrestricted, but, when mounted must firmly on the furnace wall of both sides; Meanwhile, must guarantee that the flow of all radiator tubes is consistent, like this, be convenient to the temperature controlling each section.
Discharge blower fan involved in the present invention can adopt conventional determines frequency motor, if adopt variable-frequency motor, then cannot the flow of Balance route waste gas header, and controlling the temperature in stove will be more complicated.
The present invention, at certain share silicon steel portion of iron and steel enterprise second phase 2#FCL unit Successful utilization, realizes the slow cooling section cooling-production technology of different production rate, variant production specification, avoids and that cause many adverse consequencess bad due to rate of cooling.And there is the feature of simple in equipment, convenient operating maintenance, in the today of carrying forward vigorously low-carbon emission reduction, its feasibility and promotional value space very large.
Claims (10)
1. an annealing furnace radiation cooling system slow cooling section device, is characterized in that,
Described slow cooling section device is set to 4--8 section, and each section arranges an air flow control valve (3) and temperature monitor respectively, and when temperature monitor detects in-furnace temperature, information regulates air flow rate adjustment valve by feedback controller (11);
Each section, all in upper and lower arranged crosswise radiation sleeve pipe (2) of band steel, carries out cooling down by the freezing air radiation in radiation sleeve pipe to band steel,
The flow control valve (3) connecting each section is connected to after vacuum fan (5) through air line (4) is discharged by gas shaft (6).
2. a kind of annealing furnace radiation cooling system slow cooling section device as claimed in claim 1, is characterized in that, described radiation sleeve pipe (2) is that a kind of top-bottom cross is arranged, adopted vacuum fan to carry out the assembled casing of radiation displacement,
The exhausting amount of each section air line controls automatically by battery valve, to associate control air flow quantity with fire box temperature.
3. a kind of annealing furnace radiation cooling system slow cooling section device as claimed in claim 1, it is characterized in that, all radiation sleeve pipes are all connected with air line, are provided with cold air inlet (101) in described radiation sleeve pipe (2), arrange an air outlet (103) on the top of inner sleeve.
4. a kind of annealing furnace radiation cooling system slow cooling section device as claimed in claim 1, it is characterized in that, described slow cooling section device (1) arranges four sections.
5. a kind of annealing furnace radiation cooling system slow cooling section device as claimed in claim 1, is characterized in that, the described radiation sleeve pipe that cools up and down controls at 50MM--150MM with the spacing of band steel.
6. an annealing furnace radiation cooling system slow cooling section control method, it is characterized in that, annealing furnace radiation cooling system slow cooling section device is set, described slow cooling section device (1) is set to 4-8 section, each section arranges an air flow control valve (3), each stove district set temperature detector respectively of slow cooling section, when temperature monitor detects in-furnace temperature, regulates air flow rate adjustment valve by information by feedback controller (11); Each section, all in upper and lower arranged crosswise radiation sleeve pipe (2) of band steel, carries out cooling down by freezing air radiation in radiation sleeve pipe to band steel.
7. a kind of annealing furnace radiation cooling system slow cooling section control method as claimed in claim 6, is characterized in that,
Described radiation sleeve pipe (2) is that a kind of top-bottom cross is arranged, adopted vacuum fan to carry out the assembled casing of radiation displacement, and the exhausting amount of each section air line controls automatically by battery valve, to associate control air flow quantity with fire box temperature.
8. a kind of annealing furnace radiation cooling system slow cooling section control method as claimed in claim 6, it is characterized in that, all radiation sleeve pipes are all connected with air line, be provided with cold air inlet (101) in described radiation sleeve pipe (2), an air outlet (103) is set on the top of inner sleeve.
9. a kind of annealing furnace radiation cooling system slow cooling section control method as claimed in claim 6, it is characterized in that, described slow cooling section device (1) arranges four sections.
10. a kind of annealing furnace radiation cooling system slow cooling section control method as claimed in claim 6, is characterized in that, the described radiation sleeve pipe that cools up and down controls at 50MM--150MM with the spacing of band steel.
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| CN201310257345.0A CN104250678B (en) | 2013-06-25 | 2013-06-25 | Horizental annealer radiation cooling system slow cooling section device and control method |
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| CN201310257345.0A CN104250678B (en) | 2013-06-25 | 2013-06-25 | Horizental annealer radiation cooling system slow cooling section device and control method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570300Y (en) * | 2002-09-11 | 2003-09-03 | 陆峥 | Speed regulation and controlled blowing cooling device |
| CN201512565U (en) * | 2009-08-21 | 2010-06-23 | 武汉钢铁(集团)公司 | Jet flow slow cooling device of electric heating cover type furnace |
| CN202595217U (en) * | 2012-02-17 | 2012-12-12 | 宝山钢铁股份有限公司 | Band steel cooling system |
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2013
- 2013-06-25 CN CN201310257345.0A patent/CN104250678B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570300Y (en) * | 2002-09-11 | 2003-09-03 | 陆峥 | Speed regulation and controlled blowing cooling device |
| CN201512565U (en) * | 2009-08-21 | 2010-06-23 | 武汉钢铁(集团)公司 | Jet flow slow cooling device of electric heating cover type furnace |
| CN202595217U (en) * | 2012-02-17 | 2012-12-12 | 宝山钢铁股份有限公司 | Band steel cooling system |
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