CN101915505A - Device and method for rapidly reducing temperature of heat treatment furnace - Google Patents
Device and method for rapidly reducing temperature of heat treatment furnace Download PDFInfo
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- CN101915505A CN101915505A CN 201010261732 CN201010261732A CN101915505A CN 101915505 A CN101915505 A CN 101915505A CN 201010261732 CN201010261732 CN 201010261732 CN 201010261732 A CN201010261732 A CN 201010261732A CN 101915505 A CN101915505 A CN 101915505A
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Abstract
The invention provides a device and a method for rapidly reducing the temperature of a heat treatment furnace. The device comprises a burner nozzle controller 5, a gas valve bank, an air valve bank and a heating/cooling tube bank. The burner nozzle controller 5 is connected to the control ends of the gas valve bank and the air valve bank, and the outlet ends of the gas valve bank and the air valve bank are connected to the heating/cooling tube bank. The burner nozzle controller 5 controls the ignition of the heating/cooling tube bank through a burner nozzle ignition electrode and an ignition transformer 10, and monitors the flame condition of the heating/cooling tube bank through a flame monitoring device 11. During the cooling condition of a hearth, the burner nozzle controller 5 or an independent control signal source opens an air solenoid valve 7 independently, so that combustion-supporting air enters an I-shaped radiant tube 1 to take away heat in the radiant tube so as to further cool the hearth. The invention rapidly reduces the temperature of the roller-hearth type heat treatment furnace under protective atmosphereby using the existing conditions, and can quicken the temperature reduction process of the heat treatment furnace for shutting-down overhaul.
Description
Technical field
The present invention relates to steel plate heat treatment field, particularly steel plate radiant tube heated protective atmosphere heat treatment stove field.
Background technology
The protective atmosphere roller hearth heat-treated furnace is the key equipment on the cut deal heat-treatment lines, its adopt purity be 99.99% nitrogen as protective atmosphere, by I type radiant tube indirect, adopt low NO
X(x represents an oxygen atomicity in the nitrogen oxide molecule) self preheating burner carries out pulse-combustion control, carries out frequency conversion drive and control separately by hearth roll, realizes flexible and changeable speed control.Heat-treatment furnace has the output height, and furnace temperature is even, the automaticity height, and advantage such as properties of product are stable, evenly, and surface quality is good is subjected to the favor of vast Heavy Plate Production factory, has obtained extensive use.
Just because of protective atmosphere heat-treatment furnace excellent sealing performance, be full of stanch air nitrogen, adopt reasons such as radiant tube indirect, cause the heat-treatment furnace heat-sinking capability seriously to be slackened, its cooling rate is slower.For example, under natural cooling condition, furnace temperature is reduced to 150 ℃ by 900 ℃, needs the time at three days three nights (72h).Have a strong impact on the stove operating rate.
Cut deal heat treatment has the characteristics of " small lot, many kinds ", and the Technology for Heating Processing that different types of steel plate requires may have nothing in common with each other.Therefore, in the cut deal heat treatment process, need kinds of processes temperature-fall period (for example, furnace temperature is reduced to 650 ℃ by 900 ℃, or furnace temperature is reduced to 450 ℃ by 900 ℃) inevitably.The technology temperature-fall period generally adopts the mode of cooling off naturally behind the empty stove at present.This mode not only cool time long, and empty stove process also needs long time, finally causes the prolongation of whole technology temperature-fall period.
In addition, accident blowing out or quality blowing out (for example, the hearth roll dross will have a strong impact on plate quality, need the blowing out grinding roller) can appear in heat-treatment furnace unavoidably.In order to shorten the blowing out temperature fall time, operating personnel adopt air blast in burner hearth, pack into cold steel plate in stove continuously mode such as operation lower the temperature, these modes to a certain extent, can accelerate cooling rate, but the discharging of burner hearth high temperature air that air blast produces, heated cold steel plate uses and deposits and perplexing operating personnel always.
As seen low cooling rate is unfavorable for that promptly the adjustment of production technology changes, and also is unfavorable for the shutdown maintenance under the accident condition, has influenced the production flexibility of heat-treatment furnace and the raising of operating rate to a great extent.
Summary of the invention
Technical problem to be solved by this invention is: a kind of apparatus and method that realize rapidly reducing temperature of heat treatment furnace are provided, the present invention is under the situation that does not change furnace atmosphere, utilize existence conditions to realize the fast cooling of protective atmosphere roller hearth heat-treated furnace, to accelerate heat-treatment furnace technology temperature-fall period, promote the flexibility of producing; The present invention can also accelerate the temperature-fall period of heat-treatment furnace shutdown maintenance, shortens the cooling repair time, improves heat-treatment furnace effective operation rate.
The technical solution adopted in the present invention is: a kind of device of realizing rapidly reducing temperature of heat treatment furnace, it comprises burner controller 5, gas valve group, air valve group and heat supply/cooling tube group, burner controller 5 is connected to the control end of gas valve group and air valve group, the port of export of gas valve group and air valve group is connected to heat supply/cooling tube group, burner controller 5 carries out IGNITION CONTROL by burner ignitor and 10 pairs of heat supplies of ignition transformer/cooling tube group, and burner controller 5 is monitored by the flame situation of 11 pairs of heat supplies of flame monitoring apparatus/cooling tube group.
Under the burner hearth cooling condition, air magnetic valve 7 is opened in burner controller 5 or independent control signal source separately, and combustion air is entered in the I type radiant tube 1, the heat of radiant tube is taken away, and then made the burner hearth cooling.
Compare with the natural type of cooling behind the empty stove, rapidly reducing temperature of heat treatment furnace device and method provided by the present invention has the following advantages:
1. cooling velocity is fast
2. can realize subregion cooling, reduce or avoid empty stove in the heat-treatment furnace technology temperature-fall period
3. the technology temperature fall time shortens greatly, has improved the operating rate of heat-treatment furnace
In the shutdown maintenance process, continuous operation method is compared in burner hearth air blast, the cold steel plate stove, and rapidly reducing temperature of heat treatment furnace method provided by the present invention and device have the following advantages:
1. the hot-air that cooled hearth produced is directly discharged outside the factory building by the heat-treatment furnace smoke evacuation system
2. do not need allocation and transportation, deposit to cool off and use steel plate, production management is simple
3. in addition, this method is only carried out upgrading to the control section of combustion system, can not increase extra cost; Since in the process of cooling air in entering radiant tube,, can not cause the damage of ceramic inner pipe in the radiant tube because of chilling at first by the self-preheating device preheating of burner, safe and reliable.
The experiment proved that, adopt this cool-down method and device, the heat-treatment furnace temperature is reduced to 450 ℃ by 900 ℃ and shortens to 10 hours, reduces to 150 ℃ by 450 ℃ and shortens to 18 hours.
Description of drawings
Fig. 1 is the radiant tube heater structural representation.
Fig. 2 is the A-A view of accompanying drawing 1.
Fig. 3 is radiant tube heater control principle figure ().
Fig. 4 is radiant tube heater control principle figure (two).
Among the figure, 1:I type radiant tube; 2: low NO
XSelf preheating burner; 3: pipe in the carborundum; 4: fin convection air preheater; 5: burner controller; 6: combustion gas is pneumatic/magnetic valve (it adopts pneumatic operated valve or magnetic valve); 7: the air magnetic valve; 8: the manual open and close valve of combustion gas; 9: the manual open and close valve of air; 10: burner ignitor and ignition transformer; 11: flame monitoring apparatus; 12: the combustion gas manual modulation valve.
The specific embodiment
A kind of device of realizing rapidly reducing temperature of heat treatment furnace, it comprises burner controller 5, gas valve group, air valve group and heat supply/cooling tube group, burner controller 5 is connected to the control end of gas valve group and air valve group, the port of export of gas valve group and air valve group is connected to heat supply/cooling tube group, burner controller 5 carries out IGNITION CONTROL by burner ignitor and 10 pairs of heat supplies of ignition transformer/cooling tube group, and burner controller 5 is monitored by the flame situation of 11 pairs of heat supplies of flame monitoring apparatus/cooling tube group.
In preferred embodiment, as shown in Figure 3, the gas valve group comprise combustion gas pneumatic/magnetic valve 6, the manual open and close valve 8 of combustion gas and combustion gas manual modulation valve 12, the control terminal of burner controller 5 is connected to combustion gas pneumatic/magnetic valve 6, combustion gas is pneumatic/and the arrival end of magnetic valve 6 is connected to gas entry by the manual open and close valve 8 of combustion gas, and combustion gas is pneumatic/and the port of export of magnetic valve 6 is connected to the gas entry of heat supply/cooling tube group by combustion gas manual modulation valve 12.
In preferred embodiment, as shown in Figure 3, the air valve group comprises air magnetic valve 7 and the manual open and close valve 9 of air, burner controller 5 is connected to the control terminal of air magnetic valve 7, the arrival end of air magnetic valve 7 is connected to air intake by the manual open and close valve 9 of air, and the port of export of air magnetic valve 7 is connected to the air intake of heat supply/cooling tube group.
In preferred embodiment, as depicted in figs. 1 and 2, heat supply/cooling tube group comprises the low NO that links successively
X Self preheating burner 2, fin convection air preheater 4 and I type radiant tube 1, I type radiant tube 1 inside are equipped with pipe 3 in the carborundum, the outlet of gas valve group and air valve group and low NO
XSelf preheating burner 2 joins.
In preferred embodiment, as shown in Figure 3 and Figure 4, burner controller 5 adopts BCU controller or IES258 type controller, and when adopting the IES258 type controller, the control end of air magnetic valve 7 also is connected to independent control signal source.
A kind of method that realizes rapidly reducing temperature of heat treatment furnace: under the burner hearth cooling condition, air magnetic valve 7 is opened in burner controller 5 or independent control signal source separately, the manual open and close valve 9 of air is in open mode, the gas valve group is in closed condition, combustion air is entered in the I type radiant tube 1, the heat of radiant tube is taken away, and then made the burner hearth cooling.
Under burner hearth heat supply condition, burner controller 5 control combustion gas are pneumatic/magnetic valve 6, air magnetic valve 7, burner ignitor 10 interlocking actions, make heat supply/cooling tube group combustion heat supplying.
Operation principle of the present invention: shown in Fig. 1～4, heat-treatment furnace heating system of the present invention is made of some cover radiant tube heaters.Every cover radiant tube heater includes burner controller 5, low NO
X Self preheating burner 2, fin convection air preheater 4, combustion gas be pneumatic/and magnetic valve 6, air magnetic valve 7, the manual open and close valve 8 of combustion gas (use during plant maintenance, usually open), combustion gas manual modulation valve 12 (uses during debugging, usually open), pipe 3 in the manual open and close valve 9 of air (usefulness during plant maintenance is opened usually), burner ignitor and ignition transformer 10, I type radiant tube 1, the carborundum.
The operation principle of radiant tube heater: after burner controller 5 obtains work order, open combustion gas pneumatic operated valve/magnetic valve 6 and air magnetic valve 7, burner ignitor and ignition transformer 10 will hang down NO simultaneously
XThe empty fuel gas mixture of ceramic-lined chamber is lighted in the self preheating burner 2, and forms continual and steady flame; Flame is from the ejection of burner mouth, and high-temperature flue gas directly enters the interior pipe 3 of carborundum and moves to I type radiant tube 1 end; And reverse flow in the gap that pipe 3 forms in I type radiant tube 1 and carborundum, and finally pass through after the fin convection air preheater 4, by low NO
XThe smoke discharging pipe of self preheating burner 2 is discharged.At low NO
XUnder the effect of self preheating burner 2, I type radiant tube 1 forms the hyperthermia radiation source, and the steel plate in the burner hearth is heated.
Radiant tube heater involved in the present invention, the function that not only has the burner hearth heat supply, the function that also has burner hearth cooling (from the burner hearth heat absorption), be characterized in: by original pipe-line system, in I type radiant tube 1, supply the former combustion-supporting cooling air of using separately, mode with cooling air cooling radiant tube finally realizes rapidly reducing temperature of heat treatment furnace.
Air magnetic valve 7 involved in the present invention is control magnetic valve separately, when promptly burner controller 5 has independent control air magnetic valve 7 functions, by burner controller 5 controls; When burner controller 5 does not possess independent control air magnetic valve 7 functions, introduce independent control signal, carry out open and close controlling.
Fig. 1 is the radiant tube heater structural representation.Fig. 2 is the A-A view of Fig. 1, and the gas of "+" expression burner ejection is along flowing from outside to inside perpendicular to the paper direction; " " expression runs into radiant tube end face gas, reverse flow, that is, and along flowing from inside to outside perpendicular to the paper direction.
Fig. 3 is radiant tube heater control principle figure (), and burner controller 5 adopts universal BCU burner controller among this figure, and it has the function of independent control air magnetic valve 7.In off working state following time,, " 2 " of burner controller 5, " 4 ", " 5 " position are in electronegative potential, and combustion gas is pneumatic/and magnetic valve 6, air magnetic valve 7, burner ignitor 10 all be in closed condition; When being in the heating furnace state, " 2 " of burner controller 5, " 4 ", " 5 " position are in high potential, and combustion gas is pneumatic/magnetic valve 6, air magnetic valve 7, burner ignitor 10 interlocking actions, burner is continued to light; When being in the cooled hearth state, " 2 " of burner controller 5 position is in high potential, and " 4 ", " 5 " position is in electronegative potential, has only air magnetic valve 7 to open, and realizes reaching the purpose that reduces fire box temperature toward I type radiant tube 1 interior drum cold wind.
Fig. 4 is radiant tube heater control principle figure (two), and burner controller 5 adopts universal I ES258 burner controller among this figure, and it does not have the function of independent control air magnetic valve 7.In off working state following time,, " 2 " of burner controller 5, " 4 ", " 5 " position are in electronegative potential, and combustion gas is pneumatic/and magnetic valve 6, air magnetic valve 7, burner ignitor 10 all be in closed condition; When being in the heating furnace state, " 2 " of burner controller 5, " 4 ", " 5 " position are in high potential, and combustion gas is pneumatic/magnetic valve 6, air magnetic valve 7, burner ignitor 10 interlocking actions, burner is continued to light; When being in the cooled hearth state, " 2 " of burner controller, " 4 ", " 5 " position all are in electronegative potential, and the extraneous signal in independent control signal source is opened air magnetic valve 7, realizes rousing cold wind in I type radiant tube 1, reaches the purpose that reduces fire box temperature.
Claims (6)
1. device of realizing rapidly reducing temperature of heat treatment furnace, it is characterized in that: it comprises burner controller (5), gas valve group, air valve group and heat supply/cooling tube group, burner controller (5) is connected to the control end of gas valve group and air valve group, the port of export of gas valve group and air valve group is connected to heat supply/cooling tube group, burner controller (5) carries out IGNITION CONTROL by burner ignitor and ignition transformer (10) to heat supply/cooling tube group, and burner controller (5) is monitored the flame situation of heat supply/cooling tube group by flame monitoring apparatus (11).
2. device according to claim 1, it is characterized in that: the gas valve group comprise combustion gas pneumatic/magnetic valve (6), the manual open and close valve of combustion gas (8) and combustion gas manual modulation valve (12), the control terminal of burner controller (5) is connected to combustion gas pneumatic/magnetic valve (6), combustion gas is pneumatic/and the arrival end of magnetic valve (6) is connected to gas entry by the manual open and close valve of combustion gas (8), and combustion gas is pneumatic/and the port of export of magnetic valve (6) is connected to the gas entry of heat supply/cooling tube group by combustion gas manual modulation valve (12).
3. device according to claim 1, it is characterized in that: the air valve group comprises air magnetic valve (7) and the manual open and close valve of air (9), burner controller (5) is connected to the control terminal of air magnetic valve (7), the arrival end of air magnetic valve (7) is connected to air intake by the manual open and close valve of air (9), and the port of export of air magnetic valve (7) is connected to the air intake of heat supply/cooling tube group.
4. device according to claim 1 is characterized in that: heat supply/cooling tube group comprises the low NO that links successively
XSelf preheating burner (2), fin convection air preheater (4) and I type radiant tube (1), I type radiant tube (1) inside are equipped with pipe (3) in the carborundum, the outlet of gas valve group and air valve group and low NO
XSelf preheating burner (2) joins.
5. according to each described device in the claim 1～4, it is characterized in that: burner controller (5) adopts BCU controller or IES258 type controller, and when adopting the IES258 type controller, the control end of air magnetic valve (7) also is connected to independent control signal source.
6. method that realizes rapidly reducing temperature of heat treatment furnace, it is characterized in that: under the burner hearth cooling condition, air magnetic valve (7) is opened in burner controller (5) or independent control signal source separately, and combustion air is entered in the I type radiant tube (1), the heat of radiant tube is taken away, and then made the burner hearth cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010261732 CN101915505A (en) | 2010-08-25 | 2010-08-25 | Device and method for rapidly reducing temperature of heat treatment furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010261732 CN101915505A (en) | 2010-08-25 | 2010-08-25 | Device and method for rapidly reducing temperature of heat treatment furnace |
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| CN101915505A true CN101915505A (en) | 2010-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010261732 Pending CN101915505A (en) | 2010-08-25 | 2010-08-25 | Device and method for rapidly reducing temperature of heat treatment furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221221A (en) * | 2011-03-29 | 2011-10-19 | 上海宝钢工业检测公司 | Gas pressure layering control method of pulse-combustion industrial furnace |
| CN102676842A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Ignition control system for oxygen top-blown smelting furnace |
| CN114807572A (en) * | 2021-01-28 | 2022-07-29 | 张正 | Novel stainless steel solid solution heat treatment furnace |
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| CN1807661A (en) * | 2005-12-29 | 2006-07-26 | 上海交通大学 | Heat treatment furnace employing heat pipe to quickly lower temperature |
| CN200967829Y (en) * | 2006-10-31 | 2007-10-31 | 黄石山力科技发展有限公司 | Radiation heating and cooling tube device for strip steel continuous annealing furnace |
| CN201793663U (en) * | 2010-08-25 | 2011-04-13 | 中冶南方(武汉)威仕工业炉有限公司 | Device for realizing quick temperature reduction of heat treatment furnace |
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2010
- 2010-08-25 CN CN 201010261732 patent/CN101915505A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1807661A (en) * | 2005-12-29 | 2006-07-26 | 上海交通大学 | Heat treatment furnace employing heat pipe to quickly lower temperature |
| CN200967829Y (en) * | 2006-10-31 | 2007-10-31 | 黄石山力科技发展有限公司 | Radiation heating and cooling tube device for strip steel continuous annealing furnace |
| CN201793663U (en) * | 2010-08-25 | 2011-04-13 | 中冶南方(武汉)威仕工业炉有限公司 | Device for realizing quick temperature reduction of heat treatment furnace |
Non-Patent Citations (2)
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| 《工业炉》 200809 魏军广 辊底式炉在中厚板热处理中的应用 第32-34页 第30卷, 第05期 2 * |
| 《金属热处理》 2007 景国荣等 燃气加热托辊型网带炉生产线的研制与应用 第89-91页 第32卷, 第01期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676842A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Ignition control system for oxygen top-blown smelting furnace |
| CN102676842B (en) * | 2011-03-10 | 2016-01-27 | 中国恩菲工程技术有限公司 | The Iganition control system of oxygen top-blown smelting furnace |
| CN102221221A (en) * | 2011-03-29 | 2011-10-19 | 上海宝钢工业检测公司 | Gas pressure layering control method of pulse-combustion industrial furnace |
| CN102221221B (en) * | 2011-03-29 | 2016-01-20 | 宝钢工业炉工程技术有限公司 | The industrial furnace gaseous-pressure hierarchical control method of pulse-combustion |
| CN114807572A (en) * | 2021-01-28 | 2022-07-29 | 张正 | Novel stainless steel solid solution heat treatment furnace |
| CN114807572B (en) * | 2021-01-28 | 2023-12-01 | 丽水龙东不锈钢有限公司 | Stainless steel solid solution heat treatment furnace |
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Application publication date: 20101215 |