EP3938549A1 - Vorrichtung und verfahren zum kühlen und/oder reinigen eines aus einem konverter austretenden prozessgases - Google Patents
Vorrichtung und verfahren zum kühlen und/oder reinigen eines aus einem konverter austretenden prozessgasesInfo
- Publication number
- EP3938549A1 EP3938549A1 EP20706156.5A EP20706156A EP3938549A1 EP 3938549 A1 EP3938549 A1 EP 3938549A1 EP 20706156 A EP20706156 A EP 20706156A EP 3938549 A1 EP3938549 A1 EP 3938549A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- process gas
- cooling unit
- waste heat
- temperature
- heat boiler
- 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.)
- Pending
Links
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
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
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- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- 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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/18—Arrangements of dust collectors
-
- 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
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/22—Arrangements of heat-exchange apparatus
-
- 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
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/26—Arrangements of heat-exchange apparatus
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- 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
Definitions
- the invention relates to a device for cooling and / or cleaning a process gas emerging from a converter, having at least one evaporation cooling unit and at least one waste heat boiler connected downstream of the evaporation cooling unit with respect to a process gas flow through the device.
- the invention relates to a system for cooling and / or cleaning a process gas emerging from a converter, having at least one cooling chimney that can be connected to the converter and at least one electrostatic dust collector.
- the invention also relates to a method for cooling and / or cleaning a process gas exiting a converter, the process gas exiting the converter being cooled and / or cleaned by means of at least one evaporation cooling unit and the process gas exiting the evaporation cooling unit being cooled and / or by means of at least one waste heat boiler or cleaned.
- the process gas is cooled to a temperature of around 750 ° C to around 1,100 ° C by means of an evaporation-cooled chimney while an oxygen jet is being blown into the converter.
- the correspondingly cooled process gas is then cooled to a temperature of about 200 ° C. by means of an evaporation cooling unit, for which purpose cooling water is sprayed or injected directly into the process gas by means of the evaporation cooling unit.
- a large amount of water is injected into the hot process gas. The inherent heat of the process gas entering the evaporative cooling unit is not used.
- the process gas mass flow rate is increased by about 29% to about 36% due to the water injection.
- another conventional cooling and cleaning of a process gas emerging from a metallurgical converter is between the cooling chimney and the Evaporative cooling unit connected a waste heat boiler with which the temperature of the process gas is initially reduced to about 500 ° C to about 400 ° C before it is fed to the evaporative cooling unit.
- DE 1 279 275 A discloses a method for the automatic control and / or regulation of induced draft fans for boilers with rapidly changing heat supply, in particular for waste heat boilers in metallurgical furnaces, e.g. B. Oxygen top-up converter. The temperature of the flue gases is continuously measured in the boiler and converted in a transducer.
- WO 89/1 1904 A1 discloses a method for the simultaneous dry separation of solid and gaseous substances from flue gases or systems that generate corresponding pollutant-containing waste gases, such as furnace boilers, converters, rotary kilns or the like. Absorbents are added to the flue gas flow, which react with pollutants and which are separated out in a filter together with the solids carried along by the flue gas flow. The absorbents are added to the flue gas flow at temperatures above 250 ° C.
- CN 105 648 141 A discloses a system and a method for recovering waste gas heat from a converter.
- the system includes an evaporative cooling tower for cooling a converter exhaust gas to a temperature of 300 ° C to 500 ° C, a waste heat recovery device connected to an outlet of the evaporative cooling tower, and an electrical dust collector connected to an outlet of the waste heat recovery device.
- the waste heat recovery device has a waste heat boiler, which is connected to a pipeline and a boiler tube, a vent, a smoke outlet, has a medium pressure evaporator, a low pressure evaporator and a coal preheater.
- the converter flue gas successively exchanges heat with the medium pressure evaporator, the low pressure evaporator and the coal preheater, with a saturated steam being generated.
- the device has a waste heat boiler, an evaporation cooling unit connected downstream of the waste heat boiler with regard to a process gas flow through the device, and an electrostatic filter connected downstream of the evaporation cooling unit with regard to the process gas flow.
- the device has an evaporative cooling unit and an electrostatic filter connected downstream of the evaporative cooling unit with regard to a process gas flow through the device.
- the process gas at the outlet of the evaporative cooling unit has a temperature of 200 ° C.
- One object of the invention is to improve the cooling and / or cleaning of a process gas emerging from a converter.
- the process gas temperature is only cooled to a temperature in the range from 400 ° C. to 850 ° C. instead of - as is conventional - to around 200 ° C. by means of the evaporation cooling unit.
- the temperature of the process gas to be fed to the evaporative cooling unit can be increased from an initial temperature, which can be in a range from 1800 ° C. to 2100 ° C., by means of a cooling stack connected to the converter, to a temperature in a range from 1,100 ° C. to 750 ° C can be cooled.
- the temperature of the process gas leaving the evaporative cooling unit depends on the temperature of the process gas to be supplied to the evaporative cooling unit.
- the temperature of the process gas which is in the range from 400 ° C. to 850 ° C., can be reduced to a temperature in the range from 170 ° C. to 280 ° C. by means of the waste heat boiler.
- the temperature of the process gas leaving the waste heat boiler depends on the temperature of the process gas to be supplied to the waste heat boiler.
- the evaporation cooling unit according to the invention can be operated with a lower consumption of injection water.
- the moisture of the process gas that can be generated by means of the evaporative cooling unit ensures, in particular, optimal operation of an electrostatic dust separator connected downstream of the device.
- the amount of water injected into the process gas by means of the evaporative cooling unit can be determined as a function of a process gas humidity required for the operation of the electrostatic dust separator, in particular as a further cooling of the process gas takes place by means of the downstream waste heat boiler, so that there is greater freedom to inject the water into the process gas.
- the water Since no waste heat boiler or the like is connected upstream of the evaporation cooling unit, the water is injected into a process gas at a significantly higher temperature by means of the evaporation cooling unit. In this way, complete evaporation of the water can be guaranteed, even when the process gas temperatures are slightly lower.
- the waste heat boiler generates saturated steam in addition to steam generated by means of a cooling stack connected to the converter.
- the waste heat boiler is an integral part of a steam generation system, with which about 25% to about 40% more steam can be generated than with a conventional steam generation system.
- the waste heat boiler can in particular be a convection waste heat boiler.
- the waste heat boiler functions as a buffer between the evaporative cooling unit and an electrostatic dust collector.
- the process gas cooled and / or purified by means of the device according to the invention can be discharged or reused for another purpose.
- the device can be used as part of a metallurgical steelmaking plant.
- the evaporation cooling unit and / or the waste heat boiler are or is set up to reduce a proportion of coarse dust in the process gas.
- the coarse dust content of the process gas to be fed to the waste heat boiler can thus be reduced by means of the evaporative cooling unit.
- the heating surfaces of the waste heat boiler exposed to the process gas are less soiled with coarse dust, so that the effectiveness of the waste heat boiler heating surfaces is improved.
- the coarse dust separated from the process gas can be landfilled or reused in a steel production process.
- the device has at least one firing unit, connected upstream of the evaporation cooling unit with respect to the process gas flow, for heating the process gas to be supplied to the evaporation cooling unit.
- the firing unit can be activated if the converter is operated discontinuously (batch process), so that it can be ensured that the device is supplied with a process gas at a sufficiently high temperature.
- the process gas cooled and / or purified by the device can be fed to the firing unit in order to burn it by means of the firing unit.
- a system for cooling and / or cleaning a process gas emerging from a converter has at least one cooling chimney that can be connected to the converter, at least one electrostatic dust collector and at least one device according to one of the above-mentioned configurations or a combination of at least two of these configurations with one another, wherein the evaporation cooling unit and the waste heat boiler are connected between the cooling chimney and the electrostatic dust collector with respect to a process gas flow through the system.
- the advantages mentioned above with reference to the device are correspondingly associated with the system.
- the system can have a suction fan downstream of the electrostatic dust separator. In particular, fine dust can be separated from the process gas by means of the electrostatic dust separator.
- the firing unit is arranged on the cooling chimney.
- the process gas flowing through the cooling chimney can be heated by means of the firing unit.
- the process gas emerging from the converter is cooled by means of at least one evaporative cooling unit and / or cleaned, if the process gas emerging from the evaporative cooling unit is cooled and / or cleaned by means of at least one waste heat boiler, a temperature of the process gas is lowered by means of the evaporative cooling unit to a temperature in a range from 400 ° C to 850 ° C, and a temperature of the process gas is lowered by means of the waste heat boiler to a temperature which is in a range from 170 ° C to 280 ° C.
- the device can be used according to one of the above-mentioned configurations or a combination of at least two of these configurations with one another to carry out the method.
- a coarse dust fraction of the process gas is reduced by means of the evaporation cooling unit and / or by means of the waste heat boiler.
- the process gas emerging from the converter is heated by means of at least one furnace unit before it is fed to the evaporative cooling unit.
- FIG. 1 shows a block diagram of an exemplary embodiment for a system according to the invention
- FIG. 2 a basic diagram of an exemplary embodiment for a system according to the invention.
- FIG. 1 shows a block diagram of an exemplary embodiment for a system 1 according to the invention for cooling and / or cleaning a process gas emerging from a converter 2
- the system 1 has a cooling chimney 3 connected to the converter 2, with which the process gas is cooled from a temperature in a range from 1800 ° C. to 2100 ° C. to a temperature in a range from 1100 ° C. to 750 ° C. and thereby a saturated steam 4 is generated.
- the system 1 has a device 5 connected downstream of the cooling chimney 3 for cooling and / or cleaning the from a
- the system 1 has a (dry) electrostatic dust separator 6 connected downstream of the device 5 and a suction fan 7 connected downstream of this, with which the cooled and / or cleaned process gas is suctioned off.
- the device 5 has an evaporation cooling unit 8 in the form of an evaporation cooling tower and a waste heat boiler 10 connected downstream of the evaporation cooling unit 8 with respect to a process gas flow indicated by an arrow 9 through the device 5.
- the evaporative cooling unit 8 is set up to lower a temperature of the process gas supplied to the evaporative cooling unit 8 to a temperature which is in a range from 400 ° C. to 850 ° C.
- the waste heat boiler 10 is set up to lower a temperature of the process gas supplied to the waste heat boiler 10 to a temperature which is in a range from 170 ° C. to 280 ° C.
- the evaporation cooling unit 8 and the waste heat boiler 10 are each set up to reduce a coarse dust fraction of the process gas by each removing coarse dust 11 from the process gas.
- the waste heat boiler 10 generates a saturated steam 12, which by means of the Cooling chimney 3 generated steam 4 is supplied.
- An injection water 13 is supplied to the evaporative cooling unit 8.
- the process gas leaving the evaporative cooling unit 8 can have a water content of less than 20%.
- the evaporation cooling unit 8 and the waste heat boiler 10 are connected between the cooling chimney 3 and the electrostatic dust separator 6 with respect to a direction of the process gas flow also indicated by the arrow 9 through the system 1.
- the device 5 also has a firing unit 14, connected upstream of the evaporation cooling unit 8 with respect to the process gas flow, for heating the process gas to be supplied to the evaporation cooling unit 8.
- the firing unit 14 is arranged on the cooling chimney 3.
- FIG. 2 shows a basic diagram of an exemplary embodiment for a system 1 according to the invention for cooling and / or cleaning a process gas emerging from a converter 2.
- the system 1 has a cooling chimney 3 connected to the converter 2, with which the process gas is cooled from a temperature in a range from 1800 ° C. to 2100 ° C. to a temperature in a range from 1100 ° C. to 750 ° C. and thereby a saturated steam is generated.
- the system 1 has a device 5, connected downstream of the cooling chimney 3, for cooling and / or cleaning the process gas emerging from a converter 2.
- the system 1 has a (dry) electrostatic dust separator 6 connected downstream of the device 5 and a suction fan (not shown) connected downstream of this, with which the cooled and / or cleaned process gas is suctioned off.
- the electrostatic dust separator 6 separates fine dust 18 from the process gas.
- the device 5 has an evaporation cooling unit 8 and a waste heat boiler 10, which is connected downstream of the evaporation cooling unit 8 with respect to a direction indicated by an arrow 9 of the process gas flow through the device 5, and which has several heat exchangers 17 connected in series.
- the evaporative cooling unit 8 is set up, a temperature of the Reduce evaporation cooling unit 8 supplied process gas to a temperature which is in a range of 400 ° C to 850 ° C.
- the waste heat boiler 10 is set up to lower a temperature of the process gas supplied to the waste heat boiler 10 to a temperature which is in a range from 170 ° C. to 280 ° C.
- the evaporation cooling unit 8 and the waste heat boiler 10 are each set up to reduce a coarse dust fraction of the process gas by removing coarse dust from the process gas.
- the waste heat boiler 10 generates a saturated steam, which is fed to the steam generated by the cooling stack 3.
- An injection water 13 is supplied to the evaporative cooling unit 8.
- the process gas leaving the evaporative cooling unit 8 can have a water content of less than 20%.
- the evaporation cooling unit 8 and the waste heat boiler 10 are connected between the cooling chimney 3 and the electrostatic dust separator 6 with respect to a direction of the process gas flow also indicated by the arrow 9 through the system 1.
- the device 5 also has a firing unit 14, connected upstream of the evaporation cooling unit 8 with respect to the process gas flow, for heating the process gas to be supplied to the evaporation cooling unit 8.
- the firing unit 14 is arranged on the cooling chimney 3.
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019203223 | 2019-03-11 | ||
DE102019212314.7A DE102019212314A1 (de) | 2019-03-11 | 2019-08-16 | Vorrichtung und Verfahren zum Kühlen und/oder Reinigen eines aus einem Konverter austretenden Prozessgases |
PCT/EP2020/053691 WO2020182404A1 (de) | 2019-03-11 | 2020-02-13 | Vorrichtung und verfahren zum kühlen und/oder reinigen eines aus einem konverter austretenden prozessgases |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3938549A1 true EP3938549A1 (de) | 2022-01-19 |
Family
ID=72241090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20706156.5A Pending EP3938549A1 (de) | 2019-03-11 | 2020-02-13 | Vorrichtung und verfahren zum kühlen und/oder reinigen eines aus einem konverter austretenden prozessgases |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3938549A1 (de) |
DE (1) | DE102019212314A1 (de) |
WO (1) | WO2020182404A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112725558A (zh) * | 2020-12-23 | 2021-04-30 | 苏州航明环保节能科技有限公司 | 转炉煤气干法除尘装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1279275B (de) | 1964-11-07 | 1968-10-03 | Babcock & Wilcox Dampfkessel W | Verfahren zur Steuerung und/oder Regelung von Saugzuggeblaesen |
DE3818630A1 (de) | 1988-06-01 | 1989-12-14 | Thyssen Industrie | Verfahren zur trockenabscheidung von schadstoffen aus rauchgasen und anlage zur durchfuehrung des verfahrens |
DE19521321A1 (de) | 1995-06-12 | 1996-12-19 | Abb Management Ag | Verfahren und Vorrichtung zur Reduktion des Staubgehaltes der Abgase eines Dampferzeugers |
EP2562270A4 (de) * | 2010-04-20 | 2018-07-04 | JP Steel Plantech Co. | Abgaswärmegewinnungsanlage für einen lichtbogenofen zur stahlherstellung, lichtbogenofenanlage zur stahlherstellung und abgaswärmegewinnungsverfahren für einen lichtbogenofen zur stahlherstellung |
AT510419B1 (de) * | 2011-04-22 | 2012-04-15 | Siemens Vai Metals Tech Gmbh | Verfahren und vorrichtung zur rückgewinnung von konvertergas |
CN105648141A (zh) | 2015-12-30 | 2016-06-08 | 中冶华天工程技术有限公司 | 转炉低温段烟气余热回收***及工艺 |
CN106906331A (zh) * | 2017-03-30 | 2017-06-30 | 河北华奥节能科技有限公司 | 一种回收转炉烟气余热的干法除尘装置及方法 |
CN107893143B (zh) * | 2017-12-18 | 2023-01-13 | 北京京诚泽宇能源环保工程技术有限公司 | 一种转炉煤气干法除尘余热回收***和工艺 |
-
2019
- 2019-08-16 DE DE102019212314.7A patent/DE102019212314A1/de active Pending
-
2020
- 2020-02-13 WO PCT/EP2020/053691 patent/WO2020182404A1/de unknown
- 2020-02-13 EP EP20706156.5A patent/EP3938549A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2020182404A1 (de) | 2020-09-17 |
DE102019212314A1 (de) | 2020-09-17 |
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