CN103234366A - Automatic control method for cool-constant-temperature ore discharging of sinter ore furnace - Google Patents
Automatic control method for cool-constant-temperature ore discharging of sinter ore furnace Download PDFInfo
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- CN103234366A CN103234366A CN2013101277619A CN201310127761A CN103234366A CN 103234366 A CN103234366 A CN 103234366A CN 2013101277619 A CN2013101277619 A CN 2013101277619A CN 201310127761 A CN201310127761 A CN 201310127761A CN 103234366 A CN103234366 A CN 103234366A
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Abstract
An automatic control method for the cool-constant-temperature ore discharging of a sinter ore furnace comprises the steps of crushing sinter ore discharged from a sintering machine through a crushing device, screening the crushed sinter ore through a screening device, transporting the sinter ore into a cooling furnace through a sinter ore transportation device for cooling, and discharging the sinter ore outside the cooling furnace through a discharging device. When the sinter ore is cooled and discharged, a temperature detection device detects ore discharging temperature, and by adjusting the air quantity of an induced draft fan and a blowing fan, the ore discharging temperature is adjusted and stabilized at 90-200 DEG C. According to the automatic control method for the cool-constant-temperature ore discharging of the sinter ore furnace, the ventilation quantities and the air temperature of the fans can be adjusted according to the feedforward of the air temperature and the ore temperature of an air outlet, so that the ore discharging temperature, the waste heat air temperature and the waste heat air quantity can be controlled within certain ranges, the waste heat utilization system can be guaranteed to operate normally, and the normal ore discharging can be guaranteed; and overhigh or overlow ore discharging temperature can be prevented, the stable operation can be achieved, and the sinter ore quality can be enhanced.
Description
Technical field
The present invention relates to the UTILIZATION OF VESIDUAL HEAT IN technical field,, especially relate to a kind of autocontrol method for the cold constant temperature ore discharge of sintering deposit stove.
Background technology
Steel and iron industry is national economy important foundation industry, and energy-output ratio accounts for 15% of national industrial total energy consumption, is the key industry of energy-saving and emission-reduction.In steel manufacture process, the energy consumption of sintering circuit is higher, is generally the 10-15% of iron and steel enterprise's total energy consumption.At present, sintering deposit is to utilize air dielectric to cool off through straight line cooler or circular cooler, and sintering deposit is in the process of cooling, and heat energy becomes the waste gas sensible heat, and EGT is between 100-400 ℃.In the sintering circuit total energy consumption, nearly 50% heat energy is arranged with sintering device flue gas and the discharging of cooling machine waste gas sensible heat form.
Stove cold sinter waste heat power generation process flow and equipment configuration have the waste heat that discharges in the sintering deposit cooling procedure is fully utilized, and generated energy obviously improves, and sintering system obviously reduces from power consumption rate, the tangible characteristics of energy-saving effect.Belt or encircle cold sintering machine afterheat generating system and have the system heat sources instability in the past, operating mode is changeable, the waste heat instability, the sintering machine temporary stoppage causes waste heat parameter fluctuation and generating set to be shut down.
Summary of the invention
The objective of the invention is the deficiency for solving the problems of the technologies described above, a kind of autocontrol method for the cold constant temperature ore discharge of sintering deposit stove is provided, the ventilation of the feed-forward regulation blower fan by air outlet wind-warm syndrome and ore deposit temperature among the present invention, to the wind-warm syndrome degree, thereby ore discharge temperature, waste heat wind-warm syndrome, waste heat air quantity are controlled within limits, guarantee that bootstrap system normally moves, guarantee normal ore discharge, adopt this control method, can accomplish to prevent in advance the too high or too low situation of ore discharge ore deposit temperature, realize stable operation, improve the purpose of sintering deposit quality.
The present invention is the deficiency that solves the problems of the technologies described above, and the technical scheme that adopts is:
A kind of autocontrol method for the cold constant temperature ore discharge of sintering deposit stove, comprise that the sintering deposit of discharging from sintering machine passes through the fragmentation of breaker and the screening step of screening plant, enter the cooling step of cool furnace by the sintering deposit conveying device, discharge the step of cool furnace then by drawing mechanism, along with the sintering deposit cooling is discharged, detect the ore discharge temperature by temperature-detecting device, when the ore discharge temperature is higher than design temperature, by reducing the air-introduced machine air quantity and strengthening the air blast air quantity, strengthen cooling air quantity and reduce the cooling wind-warm syndrome; When the ore discharge temperature is lower than design temperature, by increasing the air-introduced machine air quantity and reducing the air blast air quantity, reduce cooling air quantity, improve the cooling wind-warm syndrome, adjusting the ore discharge temperature stabilization is 90 ℃-200 ℃.
Also comprise the early warning regulating step in the described autocontrol method.
Described temperature-detecting device is any one in radiation thermometer, fibre optic thermometer or the quartz crystal thermometer.
The mixing wind wind-warm syndrome of described air blast and air-introduced machine is regulated the cooling air that can export arbitrary temperature in-10 ℃ to 300 ℃ by air flow rate proportioning.
Described early warning regulating step comprises the wind-warm syndrome of cool furnace air outlet and air quantity detects and the feed-forward regulation of air outlet wind-warm syndrome air quantity testing result.
The invention has the beneficial effects as follows:
1, prevent in advance ore discharge ore deposit temperature too high, cross the low or unsettled situation of air outlet wind-warm syndrome, accomplish stable operation, ordinary production.
Gu the excessive blower fan that causes of airtight cooling furnace gas-fluid resistance loss is jumped the situation of stopping in the time of 2, can preventing high temperature sintering ore deposit stove cold, also can utilize waste heat as much as possible simultaneously, reaches the maximization of UTILIZATION OF VESIDUAL HEAT IN, realizes the unit safety economical operation.
3, pass through the ventilation of the feed-forward regulation blower fan of air outlet wind-warm syndrome and ore deposit temperature, thereby the ore discharge temperature is fixed in the scope, guarantee that cooling ore deposit system and bootstrap system normally move.
4, the heat sinter chilling temperature is improper easily causes crackedly, influences sinter strength, uses the present invention the ore discharge temperature can be fixed in the scope, is beneficial to and improves the sintering deposit quality, reduces quantity of return mines, improves finished product ore deposit amount.
Description of drawings
Fig. 1 is control flow schematic diagram of the present invention.
Fig. 2 is the structure diagram of sintering deposit cool furnace.
Graphical indicia: 1, temperature-detecting device; 2, discharging opening; 3, cool furnace; 4, charging aperture; 5, air outlet; 6, checkout gear; 7, air inlet; 8, air-introduced machine; 9, air blast.
The specific embodiment
Shown in the figure, the specific embodiment is as follows:
A kind of autocontrol method for the cold constant temperature ore discharge of sintering deposit stove, comprise that the sintering deposit of discharging from sintering machine passes through the fragmentation of breaker and the screening step of screening plant, enter cooling step in the cool furnace 3 by the sintering deposit conveying device through cool furnace 3 charging apertures 4, by drawing mechanism mineral aggregate is discharged the step of cool furnace 3 then from discharging opening 2, along with the sintering deposit cooling is discharged, by being arranged on the temperature-detecting device 1 detection ore discharge temperature that cool furnace 3 discharging openings go out, and the temperature value of temperature and setting compared, the temperature value of setting can be according to the size of cool furnace 3, the setting of how much adjusting with the ore discharge amount, general design temperature is 100 ℃, when the ore discharge temperature is higher than design temperature, by reducing air-introduced machine 8 air quantity and strengthening air blast 9 air quantity, strengthen cooling air quantity and reduce the cooling wind-warm syndrome, be to reduce air-introduced machine 8 air quantity specifically, air-introduced machine 8 used wind are circulated air, temperature is higher, strengthen air blast 9 air quantity, air blast 9 used wind are ambient wind, temperature is ambient air temperature, reduced the high temperature air quantity, increased the low temperature air quantity, the wind-warm syndrome of cooling sintering deposit is reduced, thereby reach faster cooling sintering deposit, stable purpose of discharging the sintering deposit temperature; When the ore discharge temperature is lower than design temperature, by increasing air-introduced machine 8 air quantity and reducing air blast 9 air quantity, reduce cooling air quantity, improve the cooling wind-warm syndrome, in adjustment process, can also be according to the EAT of how much adjusting of ore discharge temperature departure setting value, if namely to be higher than design temperature a lot of for the ore discharge temperature, just significantly strengthen the air blast air quantity, if the ore discharge temperature is higher than design temperature still near design temperature, just an amount of increasing air blast air quantity is stablized the purpose of discharging the sintering deposit temperature thereby reach, and uses this method of adjustment, adjust the ore discharge temperature stabilization between 90 ℃-200 ℃, guarantee that so not only cooling ore deposit system and bootstrap system normally move, solid and also can prevent high temperature sintering ore deposit stove cold the time the excessive blower fan that causes of airtight cooling furnace gas-fluid resistance loss jump the situation of stopping, raising UTILIZATION OF VESIDUAL HEAT IN efficient.
Also comprise the early warning regulating step in the described autocontrol method, described early warning regulating step, comprise the wind-warm syndrome of cool furnace 3 air outlets 5 and the feed-forward regulation of air quantity detection and air outlet wind-warm syndrome air quantity testing result, refer to that specifically detecting the constant wind-warm syndrome of air outlet 5 air quantity by checkout gear 6 raises, perhaps air quantity and wind-warm syndrome increase simultaneously, at this moment just the variation that measure in the ore deposit is advanced in monitoring simultaneously, as advance ore deposit amount and temperature increases simultaneously, this just means that required cooling air quantity will increase, cooling off wind-warm syndrome simultaneously will reduce, can take to reduce air-introduced machine 8 air quantity and namely reduce fan frequency conversion, turn down the blower fan outlet damper, strengthen air blast 9 air quantity at double and strengthen fan frequency conversion, the way of opening big blower fan outlet damper reduces cool furnace 3 air inlets 7 wind-warm syndrome, increase intake, reach sintering deposit in the abundant cool furnace, guarantee stable purpose of discharging sintering deposit ore deposit temperature, if monitor cool furnace air outlet wind-warm syndrome air quantity opposite variation tendency is arranged, then can act in a diametrically opposite way, regulate round about, also can guarantee to have reached the sintering deposit ore deposit temperature of discharging and prevented ore discharge ore deposit temperature too high in advance, cross low or the unsettled situation of air outlet wind-warm syndrome, accomplish stable operation, ordinary production.
Described temperature-detecting device 1 is any one in radiation thermometer, fibre optic thermometer or the quartz crystal thermometer.
The air flow rate proportioning that passes through of described air blast 9 and air-introduced machine 8 is regulated the cooling air that can export arbitrary temperature in-10 ℃ to 200 ℃.
Claims (5)
1. autocontrol method that is used for the cold constant temperature ore discharge of sintering deposit stove, comprise the step that sintering deposit is broken by breaker and screening plant sieves of discharging from sintering machine, enter the cooling step of cool furnace by the sintering deposit conveying device, discharge the step of cool furnace then by drawing mechanism, it is characterized in that: along with the sintering deposit cooling is discharged, detect the ore discharge temperature by temperature-detecting device, when the ore discharge temperature is higher than design temperature, by reducing the air-introduced machine air quantity and strengthening the air blast air quantity, strengthen cooling air quantity and reduce the cooling wind-warm syndrome; When the ore discharge temperature is lower than design temperature, by increasing the air-introduced machine air quantity and reducing the air blast air quantity, reduce cooling air quantity, improve the cooling wind-warm syndrome, adjusting the ore discharge temperature stabilization is 90 ℃-200 ℃.
2. a kind of autocontrol method for the cold constant temperature ore discharge of sintering deposit stove according to claim 1 is characterized in that: also comprise the early warning regulating step in the described autocontrol method.
3. a kind of autocontrol method for the cold constant temperature ore discharge of sintering deposit stove according to claim 2, it is characterized in that: described early warning regulating step comprises the feedback regulation of wind-warm syndrome and air quantity detection and the air outlet wind-warm syndrome air quantity testing result of cool furnace air outlet.
4. a kind of autocontrol method for the cold constant temperature ore discharge of sintering deposit stove according to claim 1, it is characterized in that: described temperature-detecting device is any one in radiation thermometer, fibre optic thermometer or the quartz crystal thermometer.
5. a kind of autocontrol method for the cold constant temperature ore discharge of sintering deposit stove according to claim 1 is characterized in that: the mixing wind wind-warm syndrome of described air blast and air-introduced machine is regulated the cooling air that can export arbitrary temperature in-10 ℃ to 200 ℃ by air flow rate proportioning.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108411106A (en) * | 2017-02-09 | 2018-08-17 | 东芝三菱电机产业***株式会社 | The air quantity controller of cooling equipment |
| CN108662906A (en) * | 2017-03-30 | 2018-10-16 | 中冶长天国际工程有限责任公司 | A kind of vertical cooling machine flow controlling method of air and device |
| CN109682220A (en) * | 2017-10-18 | 2019-04-26 | 东芝三菱电机产业***株式会社 | It is sintered the air quantity controller of cooling equipment |
| CN114279210A (en) * | 2022-01-07 | 2022-04-05 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Novel automatic control method for air supply of vertical cooling kiln |
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| US4168951A (en) * | 1976-10-15 | 1979-09-25 | Luossavaara-Kiirunavaara Aktiebolag | Method of sintering and apparatus for carrying out the method |
| JP2007263500A (en) * | 2006-03-29 | 2007-10-11 | Jfe Steel Kk | Method for utilization of exhaust heat |
| CN101424484A (en) * | 2008-11-12 | 2009-05-06 | 昆明阳光基业股份有限公司 | Control method for stabilizing and enhancing sintered ring cooling wind temperature while smelting steel |
| CN201463613U (en) * | 2009-07-27 | 2010-05-12 | 重庆钢铁(集团)有限责任公司 | Sintered ore cooling system |
| CN102022915A (en) * | 2009-09-16 | 2011-04-20 | 中冶长天国际工程有限责任公司 | Power control method and power control system for sintering machine |
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2013
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| US4168951A (en) * | 1976-10-15 | 1979-09-25 | Luossavaara-Kiirunavaara Aktiebolag | Method of sintering and apparatus for carrying out the method |
| JP2007263500A (en) * | 2006-03-29 | 2007-10-11 | Jfe Steel Kk | Method for utilization of exhaust heat |
| CN101424484A (en) * | 2008-11-12 | 2009-05-06 | 昆明阳光基业股份有限公司 | Control method for stabilizing and enhancing sintered ring cooling wind temperature while smelting steel |
| CN201463613U (en) * | 2009-07-27 | 2010-05-12 | 重庆钢铁(集团)有限责任公司 | Sintered ore cooling system |
| CN102022915A (en) * | 2009-09-16 | 2011-04-20 | 中冶长天国际工程有限责任公司 | Power control method and power control system for sintering machine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108411106A (en) * | 2017-02-09 | 2018-08-17 | 东芝三菱电机产业***株式会社 | The air quantity controller of cooling equipment |
| CN108662906A (en) * | 2017-03-30 | 2018-10-16 | 中冶长天国际工程有限责任公司 | A kind of vertical cooling machine flow controlling method of air and device |
| CN108662906B (en) * | 2017-03-30 | 2019-11-19 | 中冶长天国际工程有限责任公司 | A kind of vertical cooling machine flow controlling method of air and device |
| CN109682220A (en) * | 2017-10-18 | 2019-04-26 | 东芝三菱电机产业***株式会社 | It is sintered the air quantity controller of cooling equipment |
| CN109682220B (en) * | 2017-10-18 | 2020-04-14 | 东芝三菱电机产业***株式会社 | Air volume control device of sintering cooling equipment |
| CN114279210A (en) * | 2022-01-07 | 2022-04-05 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Novel automatic control method for air supply of vertical cooling kiln |
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| CN103234366B (en) | 2015-03-11 |
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