CN112444125A - Temperature accurate control system of walking beam furnace of hot rolling mill - Google Patents
Temperature accurate control system of walking beam furnace of hot rolling mill Download PDFInfo
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- CN112444125A CN112444125A CN201910812690.3A CN201910812690A CN112444125A CN 112444125 A CN112444125 A CN 112444125A CN 201910812690 A CN201910812690 A CN 201910812690A CN 112444125 A CN112444125 A CN 112444125A
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- temperature
- heating section
- infrared thermometer
- main plc
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
Abstract
The invention discloses a temperature accurate control system of a stepping heating furnace of a hot rolling mill, which can accurately measure the surface temperature of a steel billet through an infrared thermometer, wherein the temperature measured by a first, a second and a fourth infrared thermometers arranged in sequence and the time form a temperature rise curve, the temperature rise curve is compared with a standard temperature rise curve in a main plc, an optimal pid adjusting parameter is obtained through a combustion control pid module and a signal is output to the main plc, the main plc controls a burner adjusting valve to adjust the air-fuel ratio, so that the flame intensity of a burner is adjusted, the surface temperature of the steel billet is controlled, the discharging quality of the steel billet is ensured, fuel gas is saved, and the service life of the furnace is prolonged.
Description
Technical Field
The invention relates to a temperature accurate control system of a walking beam furnace of a hot rolling mill.
Background
In a hot rolling mill, furnace combustion control is typically implemented using computer models, and the steel slab is heated by the furnace to a predetermined temperature to meet the rolling requirements. Because a large amount of iron scales are quickly formed after the plate temperature is discharged from the furnace and cannot be measured, the temperature of the plate is calculated by adopting the furnace temperature in the heating model, the plate temperature and the plate temperature are actually different and are difficult to accurately control, in the actual operation process, the temperature rise curves of the steel billets entering the furnace and discharged from the furnace are difficult to control, the quality of the steel billets is different, a large amount of fuel gas is wasted, the overburning in the furnace is caused, and the service life of the furnace is shortened.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a temperature accurate control system of a stepping heating furnace of a hot rolling mill.
The technical scheme of the invention is as follows: the accurate temperature control system comprises a stepping heating furnace and a main plc, wherein a first heating section, a second heating section, a third heating section and a soaking section are sequentially arranged in the stepping heating furnace according to the motion direction of a slab, a plurality of burners are arranged on the first heating section, the second heating section, the third heating section and the soaking section, the burners control the air-fuel ratio through burner regulating valves to regulate the flame intensity of the burners, the accurate temperature control system also comprises a temperature measurement assembly and a combustion control pid module, the temperature measurement assembly comprises a first infrared thermometer arranged in the middle of the top of the second heating section, a second infrared thermometer arranged in the middle of the top of the third heating section, a third infrared thermometer arranged on the left side of the top of the soaking section, a fourth infrared thermometer arranged in the middle of the top of the soaking section and a fifth infrared thermometer arranged on the right side of the top of the soaking section, the temperature measured by the temperature measuring component is transmitted to the combustion control pid module and the temperature rise is calculated, the temperature rise calculated by the combustion control pid module is compared with the standard temperature rise in the main plc, the optimal pid adjusting parameter is obtained through the combustion control pid module, a signal is output to the main plc, and the main plc controls the burner adjusting valve to adjust the air-fuel ratio.
The invention has the beneficial effects that: the surface temperature of the steel billet can be accurately measured through the infrared thermometer, the steel billet is placed in sequence firstly, secondly, the temperature measured by the fourth infrared thermometer forms a temperature rise curve with time, the temperature rise curve is compared with a standard temperature rise curve in the main plc, the optimal pid adjusting parameter is obtained through the combustion control pid module, the output signal is given to the main plc, the main plc controls the burner regulating valve to regulate the air-fuel ratio, the flame intensity of the burner is regulated, the surface temperature of the steel billet is controlled, the discharging quality of the steel billet is guaranteed, fuel gas is saved, and the service life of the furnace is prolonged.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view showing the placement of a temperature measuring unit in the furnace according to the present invention.
Fig. 2 is a block diagram of a diagram of the present invention.
Wherein: 1-a first heating section; 2-a second heating section; 3-a third heating section; 4-soaking section; 5-a first infrared thermometer; 6-a second infrared thermometer; 7-a third infrared thermometer; 8-a fourth infrared thermometer; 9-a fifth infrared thermometer;
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The specific implementation mode is as follows: referring to fig. 1-2, a temperature accurate control system of a walking beam furnace of a hot rolling mill comprises a walking beam furnace and a main plc, wherein a first heating section 1, a second heating section 2, a third heating section 3 and a soaking section 4 are sequentially arranged in the walking beam furnace according to the moving direction of a slab, a plurality of burners are arranged on the first heating section 1, the second heating section 2, the third heating section 3 and the soaking section 4, the burners control the air-fuel ratio through burner regulating valves to regulate the flame intensity of the burners, and the temperature measurement system further comprises a temperature measurement assembly and a combustion control pid module, wherein the temperature measurement assembly comprises a first infrared thermometer 5 arranged in the middle of the top of the second heating section 2, a second infrared thermometer 6 arranged in the middle of the top of the third heating section 3, a third infrared thermometer 7 arranged on the left side of the top of the soaking section 4, a fourth infrared thermometer 8 arranged in the middle of the top of the soaking section 4 and a fifth infrared thermometer 9 arranged on the right side of the top of the soaking section 4, the temperature measured by the temperature measuring component is transmitted to the combustion control pid module and the temperature rise is calculated, the temperature rise calculated by the combustion control pid module is compared with the standard temperature rise in the main plc, the optimal pid adjusting parameter is obtained through the combustion control pid module, a signal is output to the main plc, and the main plc controls the burner adjusting valve to adjust the air-fuel ratio.
In the in-service use process, the surface temperature of the steel billet can be accurately measured through the infrared thermometers, the first and second infrared thermometers are arranged in sequence, the temperature measured by the fourth infrared thermometers forms a temperature rise curve with time, the temperature rise curve is compared with a standard temperature rise curve in the main plc, the optimal pid adjusting parameter is obtained through the combustion control pid module, a signal is output to the main plc, the main plc controls the burner regulating valve to regulate the air-fuel ratio, the flame intensity of the burner is regulated, the surface temperature of the steel billet is controlled, the discharging quality of the steel billet is guaranteed, fuel gas is saved, and the service life of the furnace is prolonged.
The drawings and examples are only for the purpose of illustrating the invention and any suitable changes or modifications thereof which may occur to those skilled in the art should be considered as not departing from the scope of the invention.
Claims (1)
1. The utility model provides a hot rolling mill marching type heating furnace accurate control system of temperature, includes marching type heating furnace and main plc, be equipped with first heating section in proper order according to the direction of motion of slab in the marching type heating furnace, the second heating section, third heating section and soaking section, first heating section, the second heating section all is equipped with a plurality of nozzles on third heating section and the soaking section, the nozzle mediates nozzle flame intensity through nozzle governing valve control air-fuel ratio, its characterized in that: still include temperature measuring component and fire accuse pid module, temperature measuring component is including setting up the first infrared thermometer at second heating section furnace roof middle part, sets up the second infrared thermometer at third heating section furnace roof middle part, sets up the third infrared thermometer at soaking section furnace roof left side, sets up the fourth infrared thermometer in the middle of soaking section furnace roof and sets up the fifth infrared thermometer on soaking section furnace roof right side, the temperature that temperature measuring component recorded is given the fire accuse pid module and is calculated and draw the temperature rise, and the temperature rise that the fire accuse pid module calculated and is drawn is compared with the standard temperature rise in the main plc, draws best pid adjusting parameter and output signal for main plc through the fire accuse pid module, main plc control nozzle governing valve mediates the air-fuel ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812690.3A CN112444125A (en) | 2019-08-29 | 2019-08-29 | Temperature accurate control system of walking beam furnace of hot rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812690.3A CN112444125A (en) | 2019-08-29 | 2019-08-29 | Temperature accurate control system of walking beam furnace of hot rolling mill |
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| Publication Number | Publication Date |
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| CN112444125A true CN112444125A (en) | 2021-03-05 |
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| CN201910812690.3A Pending CN112444125A (en) | 2019-08-29 | 2019-08-29 | Temperature accurate control system of walking beam furnace of hot rolling mill |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046529A (en) * | 2021-03-12 | 2021-06-29 | 广东韶钢松山股份有限公司 | Steel billet heating system and method |
| CN113295016A (en) * | 2021-06-04 | 2021-08-24 | 安徽淮光智能科技有限公司 | Heating furnace combustion control method based on temperature measurement curve |
| CN115065710A (en) * | 2022-04-29 | 2022-09-16 | 燕山大学 | Heating furnace wisdom control by temperature change PC end and remote cloud system of observing and controling of removal end |
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| CN102886500A (en) * | 2012-10-18 | 2013-01-23 | 中钢集团鞍山热能研究院有限公司 | Method and device for rapidly and accurately detecting and controlling baking temperature of ladle |
| CN104060080A (en) * | 2013-11-01 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Heating control method and system of steel rolling heating furnace plate blank |
| CN206975423U (en) * | 2017-06-16 | 2018-02-06 | 河钢股份有限公司承德分公司 | A kind of temperature control equipment |
| CN107764076A (en) * | 2017-11-20 | 2018-03-06 | 马鞍山钢铁股份有限公司 | A kind of heater for rolling steel combustion control system and control method |
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2019
- 2019-08-29 CN CN201910812690.3A patent/CN112444125A/en active Pending
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| CN101221428A (en) * | 2007-12-20 | 2008-07-16 | 济南钢铁股份有限公司 | On-line three-dimensional temperature field D/A system of step type bar plate heating stove |
| CN102886500A (en) * | 2012-10-18 | 2013-01-23 | 中钢集团鞍山热能研究院有限公司 | Method and device for rapidly and accurately detecting and controlling baking temperature of ladle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046529A (en) * | 2021-03-12 | 2021-06-29 | 广东韶钢松山股份有限公司 | Steel billet heating system and method |
| CN113295016A (en) * | 2021-06-04 | 2021-08-24 | 安徽淮光智能科技有限公司 | Heating furnace combustion control method based on temperature measurement curve |
| CN115065710A (en) * | 2022-04-29 | 2022-09-16 | 燕山大学 | Heating furnace wisdom control by temperature change PC end and remote cloud system of observing and controling of removal end |
| CN115065710B (en) * | 2022-04-29 | 2023-07-25 | 燕山大学 | Intelligent temperature control PC end and mobile end remote cloud measurement and control system of heating furnace |
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Application publication date: 20210305 |