CN205537166U - Steel rolling heating furnace furnace pressure control type exhaust -heat boiler system - Google Patents
Steel rolling heating furnace furnace pressure control type exhaust -heat boiler system Download PDFInfo
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- CN205537166U CN205537166U CN201620401059.6U CN201620401059U CN205537166U CN 205537166 U CN205537166 U CN 205537166U CN 201620401059 U CN201620401059 U CN 201620401059U CN 205537166 U CN205537166 U CN 205537166U
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- heater
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- rolling steel
- flue gas
- boiler
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The utility model provides a steel rolling heating furnace furnace pressure control type exhaust -heat boiler system, include: combustion air pre -heater, over heater, evaporimeter, the economizer that connects gradually and the device that induced drafts, pressure sensor, pressure sensor set up in the steel rolling heating furnace, first control ware, first control ware are connected with the device electricity that induced drafts with pressure sensor respectively. The utility model discloses an over heater, proceed the heat exchange to exhaust flue gas in the combustion air pre -heater, recycle the water steam heating in the over heater to superheated steam to improve the energy utilization of high temperature flue gas. Simultaneously, the device rotational speed that induced drafts is controlled according to received pressure value to the first control ware to the regulation is to the mobile speed of flue gas, and then the furnace pressure of control steel rolling heating furnace. The utility model provides a device that induced drafts provides mobile outside power for steel rolling heating furnace exhaust flue gas, can accelerate the mobile speed of flue gas to shorten the response time of regulation.
Description
Technical field
This utility model relates to waste gas heat utilization technical field, specially heater for rolling steel controling of the pressure of the oven type afterheat boiler system.
Background technology
At present, the steel billet that steel mill produces is still that semi-finished product, need to be sent to steel rolling mill to roll, after the qualified steel such as sheet material (such as coil of strip and ingot formula plate) and long material (shaped steel, rail, bar, round steel) of making certain thickness and shape, just can apply to various rings territory.Heater for rolling steel is the important device in steel rolling mill's hot rolling technology, and its effect is to the temperature of rolling uniform, applicable by heating steel billet, to improve the plasticity of steel billet, reduces the resistance of deformation of steel billet, makes steel billet be easier to deform upon.In hot rolling technology, the furnace pressure (including combustion air pressure and gas pressure) of heater for rolling steel is one of important factor in order affecting steel rolling effect, and furnace pressure is too high or too low being all unfavorable for keeps being smoothed out of burning.If furnace pressure is too high, easily there is flame phenomenon in the fire door of heater for rolling steel, damages body of heater or other relevant devices, and then affects being normally carried out of hot rolling technology；If furnace pressure is too low, in stove, easily suck cool exterior air, and then the burning quality and effect on heater for rolling steel causes certain impact, increases the oxidation burn of steel embryo, affects the economic benefit of steel rolling mill.On the other hand, combustion air, after heater for rolling steel heats, produces a large amount of high-temperature flue gas, and along with carrying forward vigorously of China's energy-saving and emission-reduction, effective utilization of high-temperature flue gas is also one of related personnel's focus of attention.
Refer to Fig. 1, at present, existing heater for rolling steel controling of the pressure of the oven type afterheat boiler system is typically to arrange combustion-supporting air preheater at the exhanst gas outlet of heater for rolling steel, utilize the waste-heat combustion air of flue gas, heater for rolling steel it is passed through again after combustion air is preheated, thus improve the heater for rolling steel efficiency of heating surface, and then improve energy utilization rate.High-temperature flue gas is after combustion-supporting air preheater carries out heat exchange, and temperature is down to 350 DEG C-500 DEG C, and flue gas after cooling is connected with chimney through the underground flue preset, after in smoke stack emission to air.The gas baffle valve typically utilizing chimney import department to arrange in prior art controls the furnace pressure of heater for rolling steel.Concrete, utilize heater for rolling steel furnace pressure signal to control the aperture of gas baffle valve, i.e. when furnace pressure is less than predetermined threshold value, turn the aperture of gas baffle valve down；When furnace pressure is higher than predetermined threshold value, tunes up the aperture of gas baffle valve, and then control the furnace pressure of heater for rolling steel.
But, even if high-temperature flue gas and combustion air carry out heat exchange, the flue-gas temperature of discharge also up to 350 DEG C-500 DEG C, temperature is the highest relative to the air under room temperature, and the utilization rate of energy is relatively low.Meanwhile, by the way of regulation gas baffle valve, the furnace pressure of heater for rolling steel is controlled, owing to underground flue length is longer, easily cause response phenomenon not in time, such as, according to furnace pressure signal, the furnace pressure of heater for rolling steel is bigger, now tune up the aperture of gas baffle valve, the flue gas being emitted into air increases, and flue gas improves at the flow velocity of underground flue, but owing to underground flue length is longer, the furnace pressure of heater for rolling steel can not be changed faster, cause regulating there is bigger time delay.
Summary of the invention
The purpose of this utility model is, overcomes the deficiencies in the prior art, it is provided that a kind of higher afterheat boiler system of flue gas utilization rate.
For solving above-mentioned technical problem, the technical solution of the utility model is:
This utility model provides a kind of heater for rolling steel controling of the pressure of the oven type afterheat boiler system, and described system includes:
Combustion-supporting air preheater, superheater, vaporizer, economizer and the air intake device being sequentially connected with, wherein, combustion-supporting air preheater is connected with heater for rolling steel, and air intake device is connected with chimney；
Pressure transducer, described pressure transducer is arranged in described heater for rolling steel；
First controller, described first controller electrically connects with described pressure transducer and air intake device respectively, for controlling the rotating speed of air intake device.
Preferably, described system also includes:
Underground flue stop valve it is provided with described combustion-supporting air preheater and described chimney inside the underground flue being connected respectively, and described underground flue；
It is arranged at the gas proportioning damper of described chimney import；
The gas baffle valve being arranged between described underground flue and chimney, for controlling the aperture of described gas proportioning damper；
Second controller, described second controller electrically connects with described pressure transducer and gas baffle valve respectively, for controlling the aperture of gas baffle valve, thus controls the aperture of gas proportioning damper.
Preferably, described system also includes: boiler smoke inlet valve, and described boiler smoke inlet valve is arranged between described combustion-supporting air preheater and described superheater.
Preferably, described system also includes: boiler flue gas outlet valve, and described boiler flue gas outlet valve is arranged between described air intake device and described chimney.
Preferably, described system also includes:
Softening water tank, oxygen-eliminating device and drum generator, wherein,
Described oxygen-eliminating device is between described softening water tank and described economizer；
The input of described drum generator connects described economizer, and the outfan of described drum generator connects described superheater, and described drum generator is also connected by tedge and down-comer circulation with described vaporizer.
Preferably, described system also includes:
Softening water pump between described softening water tank and described oxygen-eliminating device；
And the boiler feed pump between described oxygen-eliminating device and described economizer.
The technical scheme that this utility model embodiment provides can comprise following beneficial effect:
This utility model provides a kind of heater for rolling steel controling of the pressure of the oven type afterheat boiler system, described system includes: combustion-supporting air preheater, superheater, vaporizer, economizer and the air intake device being sequentially connected with, wherein, combustion-supporting air preheater is connected with heater for rolling steel, and air intake device is connected with chimney；Pressure transducer, described pressure transducer is arranged in described heater for rolling steel；First controller, described first controller electrically connects with described pressure transducer and air intake device respectively, for controlling the rotating speed of air intake device.This utility model proceeds heat exchange by superheater to the flue gas discharged in combustion-supporting air preheater, the steam in superheater is heated to superheated steam and recycles, thus improve the capacity usage ratio of high-temperature flue gas.Simultaneously, native system also includes pressure transducer, air intake device and the first controller, pressure transducer is for gathering the force value in heater for rolling steel stove, and force value is transmitted to the first controller, first controller controls air intake device rotating speed according to the force value received, thus the flowing velocity that regulation is to flue gas, and then control the furnace pressure of heater for rolling steel.The air intake device that this utility model provides provides the external impetus of flowing for the flue gas that heater for rolling steel is discharged, and can accelerate the flowing velocity of flue gas, thus shorten the response time of regulation.
Accompanying drawing explanation
For clearer explanation this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, obviously, to those skilled in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of existing heater for rolling steel controling of the pressure of the oven type afterheat boiler system；
Fig. 2 is the structural representation of the first heater for rolling steel controling of the pressure of the oven type afterheat boiler system that this utility model provides；
Fig. 3 is the structural representation of the second heater for rolling steel controling of the pressure of the oven type afterheat boiler system that this utility model provides；
Fig. 4 is the structural representation of the third heater for rolling steel controling of the pressure of the oven type afterheat boiler system that this utility model provides.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in this utility model, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is purged, is fully described by, obviously, described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those skilled in the art are obtained under not making creative work premise, all should belong to protection domain of the present utility model.
Refer to Fig. 1, show the structural representation of the first heater for rolling steel controling of the pressure of the oven type afterheat boiler system that this utility model provides.
As seen from Figure 1, this utility model provides a kind of heater for rolling steel controling of the pressure of the oven type afterheat boiler system, and described system includes:
Combustion-supporting air preheater, superheater, vaporizer, economizer and the air intake device being sequentially connected with, wherein, combustion-supporting air preheater is connected with heater for rolling steel, and air intake device is connected with chimney, wherein, air intake device can be the relevant apparatus that air exhauster etc. has air draught effect；
Pressure transducer, described pressure transducer is arranged in described heater for rolling steel；
First controller, described first controller electrically connects with described pressure transducer and air intake device respectively, for controlling the rotating speed of air intake device.
This utility model proceeds heat exchange by superheater, vaporizer and economizer to the flue gas discharged in combustion-supporting air preheater, the steam in superheater is heated to superheated steam and recycles, thus improve the capacity usage ratio of high-temperature flue gas.Simultaneously, native system also includes pressure transducer, air intake device and the first controller, pressure transducer is for gathering the force value in heater for rolling steel stove, and force value is transmitted to the first controller, first controller controls air intake device rotating speed according to the force value received, thus the flowing velocity that regulation is to flue gas, and then control the furnace pressure of heater for rolling steel.The air intake device that this utility model provides provides the external impetus of flowing for the flue gas that heater for rolling steel is discharged, and can accelerate the flowing velocity of flue gas, thus shorten the response time of regulation.
Refer to Fig. 2, show the structural representation of the second heater for rolling steel controling of the pressure of the oven type afterheat boiler system that this utility model provides.
From Figure 2 it can be seen that described system also includes: the underground flue not being connected with described combustion-supporting air preheater and described chimney, and inside described underground flue, it is provided with underground flue stop valve；It is arranged at the gas proportioning damper of described chimney entrance；The gas baffle valve being arranged between described underground flue and chimney；Second controller, described second controller electrically connects with described pressure transducer and gas baffle valve respectively, for controlling the aperture of gas baffle valve, thus controls the aperture of gas proportioning damper.
In the present embodiment, when heater for rolling steel is properly functioning, closes underground flue stop valve, make flue gas pass sequentially through superheater, vaporizer and economizer, it is achieved flue gas and the heat exchange of steam, produce superheated steam at superheater.At this point it is possible to gas baffle valve is set to full-gear, it is, only the control action of air intake device to be regulated with the first controller the furnace pressure of heater for rolling steel, in order to reduce influence factor, improve control accuracy.
When the devices such as superheater, vaporizer and economizer break down, then close down air intake device and the first controller, open underground flue stop valve and second controller simultaneously, flue gas is made to enter underground flue smoothly, and utilize second controller to control the aperture of gas baffle valve, to regulate the furnace pressure of heater for rolling steel, and then guarantee the properly functioning of heater for rolling steel.
The present embodiment provides two flue gas paths of more parallel, can still guarantee the properly functioning of heater for rolling steel when there is plant failure.
Further, described system also includes: boiler smoke inlet valve, and described boiler smoke inlet valve is arranged between described combustion-supporting air preheater and described superheater.In the present embodiment, boiler smoke inlet valve can be boiler smoke import butterfly valve.
When the devices such as superheater, vaporizer and economizer break down, boiler smoke inlet valve is closed down while closing down air intake device and the first controller, open underground flue stop valve and second controller simultaneously, flue gas is made while entering underground flue smoothly, to avoid flue gas to enter superheater, prevent the flue gas in superheater, vaporizer and economizer from flowing backward in underground flue, affect the control effect of second controller.
Further, described system also includes: boiler flue gas outlet valve, and described boiler flue gas outlet valve is arranged between described air intake device and described chimney.In the present embodiment, boiler flue gas outlet valve can be boiler flue gas outlet butterfly valve.
When the devices such as superheater, vaporizer and economizer break down, boiler smoke inlet valve and boiler flue gas outlet valve is closed down while closing down air intake device and the first controller, while preventing the flue gas in superheater, vaporizer and economizer from flowing backward in underground flue, guarantee that remaining in the flue gas in the devices such as superheater, vaporizer and economizer does not discharges from chimney, it is to avoid the waste of energy in residual flue gas.
The present embodiment comprises boiler smoke inlet valve and boiler flue gas outlet valve, can switch flexibly between two parallel flue gas paths, it is ensured that normal, the safe operation of heater for rolling steel, make afterheat boiler system not affect the technological process of heating furnace.
Boiler flue gas outlet valve in another embodiment can also be arranged between air intake device and gas baffle valve.When occurring due to plant failure, residual flue gas belongs to uncontrollable gas, the flow velocity and the flow direction that namely remain flue gas are X factor, and when remaining exhaust gas volumn and being bigger, flue gas easily spreads to outside, produce bigger pressure, and the furnace pressure controlling foundation only heater for rolling steel of second controller, the pressure that residual flue gas produces will have a strong impact on the control accuracy of second controller, therefore, when plant failure occurs, gas baffle valve should be closed in time.
Certainly, the first controller and second controller in the present embodiment can also be an ICU, after i.e. ICU gathers heater for rolling steel force value, can control air intake device and gas baffle valve respectively.Corresponding with ICU, native system also should arrange boiler smoke inlet valve induction apparatus and underground flue stop valve induction apparatus.When boiler smoke inlet valve induction apparatus senses that boiler smoke inlet valve is opened, ICU utilizes the force value gathered to control the rotating speed of air intake device；When underground flue stop valve induction apparatus senses that underground flue stop valve is opened, ICU utilizes the force value gathered to control gas baffle valve opening, finally realizes the control to heater for rolling steel furnace pressure.
Refer to Fig. 3, show the structural representation of the third heater for rolling steel controling of the pressure of the oven type afterheat boiler system that this utility model provides.
As seen from Figure 3, described system also includes: softening water tank, oxygen-eliminating device and drum generator, and wherein, described oxygen-eliminating device is between described softening water tank and described economizer；The input of described drum generator connects described economizer, and the outfan of described drum generator connects described superheater, and described drum generator is also connected by tedge and down-comer circulation with described vaporizer.
The softening water entrance softening water tank that system is external, and softened water tank enters oxygen-eliminating device and carries out deoxygenation, after economizer heats, drum generator is entered after and, drum generator is connected by tedge and down-comer with vaporizer, forms natural circulation boiler system, produces saturated vapor, and saturated vapor is delivered to superheater, saturated vapor carries out heat exchange in the superheater with flue gas, forms supersaturated vapor, sends outside.It addition, fraction saturated vapor can also be delivered to oxygen-eliminating device soft water is carried out deoxygenation.
Further, described system also includes: the softening water pump between described softening water tank and described oxygen-eliminating device and the boiler feed pump between described oxygen-eliminating device and described economizer.Soften water pump for pressurizeing for the softening water in softening water tank so that it is enter the oxygen-eliminating device being connected with softening water tank smoothly；Boiler feed pump is for pressurizeing to the softening water within oxygen-eliminating device so that it is enter the economizer being connected with oxygen-eliminating device smoothly.In the present embodiment, soften water pump and boiler feed pump can be one, it is also possible to be multiple, depending on the quantity of softening water pump and boiler feed pump is because of needs.
The above is only detailed description of the invention of the present utility model; it should be pointed out that, for a person skilled in the art, on the premise of without departing from this utility model principle; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (6)
1. a heater for rolling steel controling of the pressure of the oven type afterheat boiler system, including the combustion-supporting air preheater being connected with heater for rolling steel, it is characterized in that, described system also includes superheater, vaporizer, economizer and the air intake device being sequentially connected with combustion-supporting air preheater, and air intake device is connected with chimney；
Pressure transducer, described pressure transducer is arranged in described heater for rolling steel；
First controller, described first controller electrically connects with described pressure transducer and air intake device respectively, for controlling the rotating speed of air intake device.
Heater for rolling steel controling of the pressure of the oven type afterheat boiler system the most according to claim 1, it is characterised in that described system also includes:
Underground flue stop valve it is provided with inside the underground flue being connected with described combustion-supporting air preheater and described chimney, and described underground flue；
It is arranged at the gas proportioning damper of described chimney import；
The gas baffle valve being arranged between described underground flue and chimney；
Second controller, described second controller electrically connects with described pressure transducer and gas baffle valve respectively, for controlling the aperture of gas baffle valve.
Heater for rolling steel controling of the pressure of the oven type afterheat boiler system the most according to claim 2, it is characterised in that described system also includes:
Boiler smoke inlet valve, described boiler smoke inlet valve is arranged between described combustion-supporting air preheater and described superheater.
Heater for rolling steel controling of the pressure of the oven type afterheat boiler system the most according to claim 3, it is characterised in that described system also includes:
Boiler flue gas outlet valve, described boiler flue gas outlet valve is arranged between described air intake device and described chimney.
Heater for rolling steel controling of the pressure of the oven type afterheat boiler system the most according to claim 1, it is characterised in that described system also includes:
Softening water tank, oxygen-eliminating device and drum generator, wherein,
Described oxygen-eliminating device is between described softening water tank and described economizer；
The input of described drum generator connects described economizer, and the outfan of described drum generator connects described superheater, and described drum generator is also connected by tedge and down-comer circulation with described vaporizer.
Heater for rolling steel controling of the pressure of the oven type afterheat boiler system the most according to claim 5, it is characterised in that described system also includes:
Softening water pump between described softening water tank and described oxygen-eliminating device；
And the boiler feed pump between described oxygen-eliminating device and described economizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620401059.6U CN205537166U (en) | 2016-05-03 | 2016-05-03 | Steel rolling heating furnace furnace pressure control type exhaust -heat boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620401059.6U CN205537166U (en) | 2016-05-03 | 2016-05-03 | Steel rolling heating furnace furnace pressure control type exhaust -heat boiler system |
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| CN205537166U true CN205537166U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620401059.6U Expired - Fee Related CN205537166U (en) | 2016-05-03 | 2016-05-03 | Steel rolling heating furnace furnace pressure control type exhaust -heat boiler system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253809A (en) * | 2018-01-15 | 2018-07-06 | 鞍钢集团工程技术有限公司 | A kind of walking beam furnace controling of the pressure of the oven method |
| CN113048801A (en) * | 2021-03-15 | 2021-06-29 | 首钢集团有限公司 | Waste heat recovery control system and method for hot rolling heating furnace |
-
2016
- 2016-05-03 CN CN201620401059.6U patent/CN205537166U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253809A (en) * | 2018-01-15 | 2018-07-06 | 鞍钢集团工程技术有限公司 | A kind of walking beam furnace controling of the pressure of the oven method |
| CN113048801A (en) * | 2021-03-15 | 2021-06-29 | 首钢集团有限公司 | Waste heat recovery control system and method for hot rolling heating furnace |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20200503 |
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| CF01 | Termination of patent right due to non-payment of annual fee |