EP3215642A1 - Method and apparatus for controlling the pressure in the exhaust gas duct of a converter - Google Patents
Method and apparatus for controlling the pressure in the exhaust gas duct of a converterInfo
- Publication number
- EP3215642A1 EP3215642A1 EP15791539.8A EP15791539A EP3215642A1 EP 3215642 A1 EP3215642 A1 EP 3215642A1 EP 15791539 A EP15791539 A EP 15791539A EP 3215642 A1 EP3215642 A1 EP 3215642A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- converter
- pressure
- mouth
- raw value
- smoke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000779 smoke Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims 1
- 230000006978 adaptation Effects 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 239000012080 ambient air Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000001408 Carbon monoxide poisoning Diseases 0.000 description 1
- 101001017827 Mus musculus Leucine-rich repeat flightless-interacting protein 1 Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/32—Blowing from above
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4673—Measuring and sampling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/02—Observation or illuminating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0071—Regulation using position sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/02—Observation or illuminating devices
- F27D2021/026—Observation or illuminating devices using a video installation
Definitions
- the invention relates to a method and a device for regulating the pressure in the exhaust duct of a converter in a steel mill to a predetermined
- Converter steelworks which have an exhaust gas recirculation system, it is known to regulate the pressure, more precisely, the negative pressure in the exhaust passage.
- the known pressure control works in such a way that when the actual pressure rises at one of the mentioned measuring points, the suction power of a suction fan in the exhaust gas duct is increased and vice versa.
- predetermined pressure setpoint more specifically, the predetermined negative pressure setpoint deliberately deliberately set too low for safety reasons, whereby the suction power of the fan is deliberately set stronger than would actually be required.
- increasing the suction power has the disadvantage that not only process gases, but also more ambient air is sucked into the exhaust gas duct, whereby carbon monoxide increasingly burns to carbon dioxide and therefore the calorific value of the process gas drops considerably.
- JP 1 165712 and JP 58177412 each disclose a method according to which the degree of opening of the converter mouth is controlled or regulated at the transition to the exhaust duct depending on the extent of flame formation at the converter mouth.
- the extent of flame formation is detected by means of a suitable camera in the form of pictorial material, which for the purpose of the control or regulation with regard to the extent of
- WO 2007/109875 A1 discloses the use of infrared sensors or filters in the recording of the
- the pressure setpoint is specified as a function of the current position or the current opening degree of the adjusting ring on the converter mouth.
- the opening position of the adjusting ring is specifically detected by means of a position measuring device and with the aid of a conversion device into a suitable
- the conversion device traditionally simply assigns the measured opening positions of the adjusting ring to specific pressure setpoints with the aid of its conversion table.
- Such a simple tabular assignment of opening positions of the adjusting ring to pressure setpoints usually provides optimal results for the time of commissioning and the creation of this table.
- the pressure situation at the converter collar changes. This is characterized among other things by
- the invention has the object, a known method and a known device for controlling the pressure in the exhaust passage of a converter to the effect that the pressure setpoint for the pressure control in the exhaust duct of the converter and regardless of the age or the operating hours of the Converter is always optimally specified.
- this object is achieved by the method according to claim 1. Specifically, this method for determining the pressure setpoint provides the following steps: Specifying a raw value for the pressure setpoint and determining the
- Pressure setpoint by adaptation of the raw value depending on the extent of smoke or flame formation at the mouth of the converter.
- raw value means that value predefined for the desired pressure value, which alone, typically with the aid of a conversion table from the detected opening position of the adjusting ring on
- the invention advantageously provides that not simply the raw value according to the conversion table, but the raw value is used only after adaptation to the current process events as a pressure setpoint for the pressure control in the exhaust duct.
- the adaptation of the raw value takes place as a function of the extent of smoke or flame formation at the mouth of the converter.
- This claimed adaptation offers the advantage that the pressure setpoint, also for safety reasons, does not have to be set lower than would be required depending on the current process situation in the converter. In this way, the external entry of ambient air is minimized by the converter mouth and thus the undesired afterburning of process gas.
- the extent of smoke or flame formation is determined by evaluating image material, which represents the respectively current smoke or flame formation at the mouth of the converter during the converter operation. In the evaluation of the image material is the
- Smoke formation equated to flame formation. It is therefore not distinguished between smoke formation and flame formation. Rather, the extent of smoke or flame formation alone is evaluated in comparison with a situation in which neither smoke nor flame formation takes place at the converter mouth.
- the evaluation of the image material essentially only components in the infrared spectral range are evaluated and interference signals in the visible spectral range are suppressed.
- the raw value is increased when the extent of smoke or flame formation is reduced, and vice versa.
- the invention provides
- the raw value is adapted not only in dependence on the extent of smoke or flame, but also by an additional consideration of the amount of active oxygen supplied to the converter.
- the supply of active oxygen in the converter is typically carried out in two ways: first by supplying a lance, especially when fresh, and secondly by supplying iron ore in which large amounts of active oxygen are bound, but during the combustion process free become.
- the supplied amount of active oxygen from both parts is calculated.
- the raw value for the pressure setpoint decreases when the amount of oxygen supplied is increased and vice versa.
- the raw value for the pressure setpoint is dependent on the measured opening degree of a collar or a hood on
- the manipulated variables which are varied within the scope of the pressure control, in order to keep the pressure in the exhaust duct constant to the specified pressure setpoint, serve either for the sole control of a flap or for the simultaneous
- the invention is attached to a figure which shows the device according to the invention.
- the figure shows a converter 100 for melting metallic material 300, typically scrap or iron ore.
- the converter 100 has at its upper end a converter mouth 120 as a transition to an exhaust passage 1 10.
- flaps 1 12 and / or a suction fan 1 14 are arranged as actuators for regulating the pressure in the exhaust passage 1 10.
- the converter term 120 is sealed off from the ambient air by a variably positionable adjusting ring 122.
- the degree of opening of the adjusting ring is z. B. with the help of hydraulic cylinders 124 variably adjustable.
- one is Blow lance 126 to detect the supply of active oxygen into the interior of the converter. So far, the technical elements described state of the art and subject of a steel plant.
- the inventive device comprises a pressure control circuit 200 for controlling the pressure in the exhaust passage 1 10 of the converter 100.
- the control is performed on a predetermined pressure setpoint P SO II.
- the scheme is the set pressure setpoint is compared with the measured respectively currently of a pressure measuring device 128 Actual pressure P
- the present invention provides that the pressure setpoint P SO II, as it is used as input for the pressure control loop 200, is formed by adapting a predetermined raw value R for the pressure setpoint. To determine the raw value, first a position measuring device 150 is provided for detecting the opening position of the adjusting ring 122 on the converter mouth 120. The thus detected opening position of the adjusting ring 122 is in a
- Conversion device 160 using a table in the raw value R for the pressure setpoint converted.
- Image capture device 130 typically a CMOS camera, preferably with an infrared filter, provided for creating image material, which Converter mouth and possibly its environment during operation of the converter shows.
- the image capture device 130 serves to detect smoke and flame formation on the converter mouth 120.
- the image material thus obtained is evaluated by an image evaluation device 132 with regard to the extent of smoke or flame formation.
- the current extent of smoke or flame formation determined in this way is fed to a pressure setpoint calculation unit 210, also called a raw value adaptation unit, for calculating the pressure setpoint value to be supplied to the pressure control loop 200 by adapting the raw value.
- the pressure setpoint calculation unit 210 performs an adaptation of the raw value likewise supplied to it, depending on the extent of smoke or flame formation on
- the adaptation of the raw value R can be further optimized by the adaptation not to the extent of smoke or flame formation, but in addition also the amount of the converter 100 active oxygen supplied with
- an acid detector 140 is provided for detecting the amount of active oxygen supplied to the converter.
- the total amount of oxygen fed in is composed, on the one hand, of the amount of oxygen fed in via the lance 126 and, on the other hand, of the amount of oxygen fed in via the iron ore, which is bound in the iron ore and released as part of the combustion.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014222788.7A DE102014222788A1 (en) | 2014-11-07 | 2014-11-07 | Method and device for regulating the pressure in the exhaust duct of a converter |
PCT/EP2015/074789 WO2016071145A1 (en) | 2014-11-07 | 2015-10-27 | Method and apparatus for controlling the pressure in the exhaust gas duct of a converter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3215642A1 true EP3215642A1 (en) | 2017-09-13 |
EP3215642B1 EP3215642B1 (en) | 2018-06-20 |
Family
ID=54478723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15791539.8A Active EP3215642B1 (en) | 2014-11-07 | 2015-10-27 | Method and apparatus for controlling the pressure in the exhaust gas duct of a converter |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170335417A1 (en) |
EP (1) | EP3215642B1 (en) |
DE (1) | DE102014222788A1 (en) |
WO (1) | WO2016071145A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MX2021012622A (en) | 2019-04-15 | 2021-11-12 | Arcelormittal | Method to control exhaust fumes aspiration during a steelmaking process. |
DE102022207976A1 (en) | 2022-08-02 | 2024-02-08 | Sms Group Gmbh | Process for producing steel in a metallurgical vessel |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3528800A (en) * | 1966-02-14 | 1970-09-15 | Leeds & Northrup Co | Optimized blowing control for basic oxygen furnaces |
JPS56160583A (en) * | 1980-05-15 | 1981-12-10 | Nippon Steel Corp | Application and control of exhaust gas |
US4415412A (en) * | 1981-10-08 | 1983-11-15 | The United States Of America As Represented By The United States Department Of Energy | Production of anhydrous aluminum chloride composition and process for electrolysis thereof |
JPS58177412A (en) | 1982-04-12 | 1983-10-18 | Kawasaki Steel Corp | Method for controlling pressure in hood of treating equipment of converter waste gas |
JPH1165712A (en) | 1997-08-11 | 1999-03-09 | Nec Gumma Ltd | Information processor |
JP4768729B2 (en) * | 2004-05-07 | 2011-09-07 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Method for distributed reservation of medium in wireless communication network |
CA2541092A1 (en) | 2006-03-28 | 2007-09-28 | Murray Thomson | Infrared light sensors for diagnosis and control of industrial furnace gases |
AT509866B1 (en) * | 2010-06-02 | 2011-12-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR DETERMINING THE TIME OF IGNITION IN THE INFLATION METHOD |
-
2014
- 2014-11-07 DE DE102014222788.7A patent/DE102014222788A1/en not_active Withdrawn
-
2015
- 2015-10-27 US US15/523,964 patent/US20170335417A1/en not_active Abandoned
- 2015-10-27 EP EP15791539.8A patent/EP3215642B1/en active Active
- 2015-10-27 WO PCT/EP2015/074789 patent/WO2016071145A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US20170335417A1 (en) | 2017-11-23 |
WO2016071145A1 (en) | 2016-05-12 |
DE102014222788A1 (en) | 2016-05-12 |
EP3215642B1 (en) | 2018-06-20 |
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