CN108655383B - System and method for recovering waste heat of damaged hot metal ladle - Google Patents
System and method for recovering waste heat of damaged hot metal ladle Download PDFInfo
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- CN108655383B CN108655383B CN201710196162.0A CN201710196162A CN108655383B CN 108655383 B CN108655383 B CN 108655383B CN 201710196162 A CN201710196162 A CN 201710196162A CN 108655383 B CN108655383 B CN 108655383B
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- tank
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- waste heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
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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
- F27D17/004—Systems for reclaiming waste heat
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a system for efficiently recovering waste heat of a damaged hot metal ladle, which comprises a hot metal ladle, a hot metal ladle car, a hoisting device, a recovery device tank cover, a partition plate, a cold air inflow nozzle, a hot air outflow device, a cold air system and a hot air recovery system, wherein the hot metal ladle is provided with a hot metal tank; the recovery device tank cover is lifted through the hoisting device, a partition plate is arranged in the middle of the recovery device tank cover, a cold air inflow nozzle is arranged on one side of the partition plate, a hot air outflow device is arranged on the other side of the partition plate, the cold air inflow nozzle is connected with a cold air system, and the hot air outflow device is connected with a hot air recovery system; the hot metal ladle and the hot metal ladle car are arranged below the recovery device tank cover. The method and the device recover the residual heat and energy of the damaged molten iron tank body waiting for maintenance, save the time of waiting for the molten iron tank body to be placed in the air for cooling, shorten the maintenance time of the molten iron tank, and improve the turnover efficiency of the molten iron tank. The problem that energy carried by the hot metal ladle which is damaged and waits for maintenance cannot be recycled can be solved, and the energy utilization efficiency is improved.
Description
Technical Field
The invention relates to a system and a method for recycling waste heat and complementary energy of a damaged molten iron tank body to be repaired. The hot metal bottle is suitable for offline maintenance of metallurgical enterprises, and belongs to the field of waste heat and complementary energy resource recycling of metallurgical industry.
Background
With the development of society, energy problems are particularly important. The reasonable utilization of a large amount of abundant waste heat and complementary energy resources generated by metallurgical enterprises becomes a problem to be solved urgently. The iron-making process in iron and steel enterprises is a major energy-consuming household, and the energy consumption of the iron and steel enterprises accounts for more than 50% of the total energy consumption. In the production operation process, although the hot metal ladle is not energy consumption equipment, the damaged hot metal ladle carries high-temperature heat before maintenance, and the damaged hot metal ladle is not recycled at present. Therefore, the method has important significance in recycling the heat carried by the damaged hot metal ladle.
After the converter is charged with iron, the requirements of normally carrying molten iron cannot be met due to the fact that a part of the molten iron tank is damaged at different degrees at the tank opening or the tank body. It can only be sent to a hot metal ladle repair shop for maintenance. At present, after a damaged molten iron tank is transported to a repair workshop, the damaged part cannot be repaired at once due to overhigh temperature of the tank body, and the damaged molten iron tank can only be placed in the air and naturally cooled for a long time for repair. This not only affects the operating efficiency of the hot-metal bottle, but also causes waste of residual heat resources in the hot-metal bottle.
Disclosure of Invention
The invention aims to solve the technical problem of providing a system and a method for recovering waste heat of a damaged hot metal ladle, so that a large amount of waste heat and residual energy carried by the damaged hot metal ladle body waiting for maintenance can be effectively and reasonably utilized, a large amount of waste heat and residual energy resources carried by the damaged hot metal ladle body waiting for maintenance can be effectively recovered and utilized, the maintenance time of the hot metal ladle can be shortened, and the turnover efficiency of the hot metal ladle can be improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a system for recovering waste heat of a damaged hot metal ladle comprises a hot metal ladle, a hot metal ladle car, a hoisting device, a recovery device tank cover, a partition plate, a cold air inflow nozzle, a hot air outflow device, a cold air system and a hot air recovery system; the recovery device tank cover is lifted through the hoisting device, a partition plate is arranged in the middle of the recovery device tank cover, a cold air inflow nozzle is arranged on one side of the partition plate, a hot air outflow device is arranged on the other side of the partition plate, the cold air inflow nozzle is connected with a cold air system, and the hot air outflow device is connected with a hot air recovery system; the hot metal ladle and the hot metal ladle car are arranged below the recovery device tank cover; the cold air system comprises a blower, a lower section cold air pipeline and an upper section cold air pipeline which are sequentially connected along the cold air flowing direction, and the lower section cold air pipeline and the upper section cold air pipeline are connected through a flange; the hot air recovery system comprises an upper section hot air pipeline, a lower section hot air pipeline, a dust remover, a waste heat recovery device, a draught fan and an exhaust pipe which are sequentially connected along the flowing direction of hot air, wherein the upper section hot air pipeline and the lower section hot air pipeline are connected through a flange.
The hoisting device comprises stand columns arranged on two sides of the recovery device tank cover, wherein the stand columns are provided with recovery device lifting mechanisms, and the recovery device lifting mechanisms are connected with the recovery device tank cover.
The hoisting device is a crown block.
The partition board is a high-temperature resistant metal plate wrapped with asbestos fibers at the periphery.
And a tank cover connecting device for hoisting is arranged above the tank cover of the recovery device.
The waste heat recovery device is in a vehicle-mounted form or a fixed form and is externally connected with heat utilization equipment.
A method for recovering waste heat of a damaged hot metal ladle is characterized in that after the iron adding of a converter is finished, a hot metal ladle car and the hot metal ladle judged to be damaged to be repaired return to a hot metal ladle repairing room together, and the hot metal ladle car carrying the hot metal ladle stops under a tank cover of a waste heat recovery device; the method comprises the following steps of (1) dropping a tank cover of the waste heat recovery device, enabling the tank cover to be in tight contact with a hot metal tank, dividing the hot metal tank into two areas by a partition plate, connecting and fixing an upper-section cold air pipeline and a lower-section cold air pipeline by using a flange, connecting and fixing an upper-section hot air pipeline and a lower-section hot air pipeline by using a flange, enabling cold air to flow into the hot metal tank from a cold air inflow nozzle through an air blower via the lower-section cold air pipeline and the upper-section cold air pipeline, exchanging heat with the tank wall on one side of the hot metal tank, enabling the cold air to flow into the other side of the hot metal tank from the bottom of the partition plate, exchanging heat with the tank wall on the other side, and enabling hot air to sequentially flow; the hot air enters the waste heat recovery device after being dedusted in the hot air outflow device and the deduster, and exchanges heat with a heat exchange medium in the waste heat recovery device, so that the heat is recycled, the hot air is cooled and is discharged into the air through the exhaust pipe, and the recycled heat is replaced by the waste heat recovery device through a phase change heat storage technology or a heat conduction oil mode and is used for heating heat utilization equipment.
Compared with the prior art, the invention has the beneficial effects that:
the method and the device recover the residual heat and energy of the damaged molten iron tank body waiting for maintenance, save the time of waiting for the molten iron tank body to be placed in the air for cooling, shorten the maintenance time of the molten iron tank, and improve the turnover efficiency of the molten iron tank. The problem that energy carried by the hot metal ladle which is damaged and waits for maintenance cannot be recycled can be solved, and the energy utilization efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a system for recovering waste heat of a damaged hot metal ladle.
FIG. 2 is a schematic view of an apparatus for recovering a damaged cover of a molten iron tank.
In the figure: 1-a hot metal ladle; 2-cold air flows into the nozzle; 3-hot air outflow device; 4-a partition board; 5-recovery device pot cover; 6-lifting mechanism of recovery device; 7-upright post; 8, an upper section cold air pipeline; 9-a blower; 10-upper hot air duct; 11-a dust remover; 12-a draught fan; 13-a waste heat recovery device; 14-ladle car; 15-tank cover connecting device; 16-a flange; 17-lower section cold air pipeline; 18-lower segment hot air duct; 19-exhaust pipe.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
referring to fig. 1-2, a system for recovering waste heat of a damaged hot metal ladle comprises a hot metal ladle 1, a hot metal ladle car 14, a hoisting device, a recovery device tank cover 5, a partition plate 4, a cold air inflow nozzle 2, a hot air outflow device 3, a cold air system and a hot air recovery system; the recovery device tank cover 5 is connected with the hoisting device through a tank cover connecting device 15 arranged above the recovery device tank cover 5 and is lifted by the hoisting device.
The hoisting device comprises upright posts 7 arranged on two sides of the recovery device tank cover 5, a recovery device lifting mechanism 6 is arranged on the upright posts 7, and the recovery device lifting mechanism 6 is connected with the recovery device tank cover 5.
The middle part of the recovery device tank cover 5 is provided with a clapboard 4, and the clapboard 4 is a high temperature resistant metal plate wrapped with asbestos fiber at the periphery. A cold air inflow nozzle 2 is arranged on one side of the partition plate 4, a hot air outflow device 3 is arranged on the other side of the partition plate, the cold air inflow nozzle 2 is connected with a cold air system, and the hot air outflow device 3 is connected with a hot air recovery system; the hot metal ladle 1 and the hot metal ladle car 14 are disposed below the recovery device tank cover 5. The hot metal ladle 1 is a broken hot metal ladle.
The cold air system comprises a blower 9, a lower section cold air pipeline 17 and an upper section cold air pipeline 8 which are sequentially connected along the flow direction of cold air, wherein the lower section cold air pipeline 17 is connected with the upper section cold air pipeline 8 through a flange 16; the hot air recovery system comprises an upper section hot air pipeline 10, a lower section hot air pipeline 18, a dust remover 11, a waste heat recovery device 13, a draught fan 12 and an exhaust pipe 19 which are sequentially connected along the flowing direction of hot air, wherein the upper section hot air pipeline 10 and the lower section hot air pipeline 18 are connected through a flange 16; the waste heat recovery device 13 is in a vehicle-mounted form or a fixed form and is externally connected with a heat utilization device.
The hoisting device can also adopt a crown block, and the recovery device tank cover 5 is connected with the crown block through the tank cover connecting device 15 by utilizing a steel wire rope.
A method for recovering the afterheat of damaged hot-metal ladle features that after the iron is added to converter, the hot-metal ladle car and the damaged hot-metal ladle 1 are returned to the workshop for repairing the hot-metal ladle. The ladle car 14 carrying the ladle 1 is stopped under the waste heat recovery device tank cover 5. The waste heat recovery device cover 5 is dropped down and is in close contact with the hot metal ladle 1. The partition plate 4 divides the hot metal ladle 1 into two regions. The upper section cold air pipeline 8 and the lower section cold air pipeline 17 are fixedly connected through a flange 16, and the upper section hot air pipeline 10 and the lower section hot air pipeline 18 are fixedly connected through a flange 16. The blower 9 blows the cold air into the hot metal ladle 1 from the cold air inflow nozzle 2 through the lower cold air duct 17 and the upper cold air duct 8. After exchanging heat with the wall of one side of the hot metal ladle 1, the hot metal flows into the other side of the hot metal ladle 1 from the bottom of the partition plate 4, and exchanges heat with the wall of the other side. After heat exchange, hot air enters the dust remover 11 through the hot air outflow device 3, the upper hot air pipeline 10 and the lower hot air pipeline 18 in sequence under the action of the induced draft fan 12. Wherein, the hot air outflow device 3 plays a certain role in dust removal. The hot air enters the waste heat recovery device 13 after being dedusted in the deduster 11, exchanges heat with the heat exchange medium in the waste heat recovery device 13, recovers and utilizes the heat, is cooled, and is discharged to the air through the exhaust pipe 19. The waste heat recovery device 13 replaces the recovered heat with a phase change heat storage technology or a heat transfer oil and the like, and is used for heating hot water or heating in winter in small plants and venues.
Example 1:
1 hot metal tank with 100 tons of molten iron in balance weight, and after the converter is charged with iron, the converter is damaged and needs to be overhauled. The temperature of the tank wall is about 1400 ℃, the waste heat of the tank wall is recovered by a waste heat system, the temperature is reduced to 300 ℃, and the recovered heat is about 548615.4 kJ; the air is heated to 200 ℃ from normal temperature, and 2756.3m is generated3Is heated. The heat of air at 200 ℃ is recovered by adopting a phase change heat storage technology, the heat is used for heating bath hot water, water is heated to 42 ℃ from 15 ℃, about 4.86 tons of water is heated, about 761kg of steam used in a traditional heating mode taking 0.8MPa saturated steam as a heat source is saved, and about 58 yuan is saved in each hot metal tank weighing 100 tons of molten iron according to the calculation of 28 yuan/GJ steam price.
Example 2:
1 hot metal tank with 120 tons of molten iron in balance weight, and after the converter is charged with iron, the converter is damaged and needs to be overhauled. The temperature of the tank wall is about 1400 ℃, the waste heat of the tank wall is recovered by a waste heat system, the temperature is reduced to 300 ℃, and the recovered heat is about 658338.5 kJ; the air is heated to 200 ℃ from normal temperature, and 3307.6m is generated3Is heated. The heat of air at 200 ℃ is recovered by adopting a phase change heat storage technology, the heat is used for heating bath hot water, water is heated to 42 ℃ from 15 ℃, about 5.82 tons of water is heated, about 914kg of steam used in a traditional heating mode with 0.8MPa saturated steam as a heat source is saved, and about 70 yuan is saved in each hot metal tank with 120 tons of molten iron weighted according to the calculation of 28 yuan/GJ steam price.
The foregoing is considered as illustrative only of the principles of the invention and is not to be in any way limiting, since all equivalent changes and modifications are intended to be included within the scope of the appended claims.
Claims (7)
1. A system for recovering waste heat of a damaged hot metal ladle is characterized by comprising a hot metal ladle, a hot metal ladle car, a hoisting device, a recovery device tank cover, a partition plate, a cold air inflow nozzle, a hot air outflow device, a cold air system and a hot air recovery system; the recovery device tank cover is lifted through the hoisting device, a partition plate is arranged in the middle of the recovery device tank cover, a cold air inflow nozzle is arranged on one side of the partition plate, a hot air outflow device is arranged on the other side of the partition plate, the cold air inflow nozzle is connected with a cold air system, and the hot air outflow device is connected with a hot air recovery system; the hot metal ladle and the hot metal ladle car are arranged below the recovery device tank cover; the cold air system comprises a blower, a lower section cold air pipeline and an upper section cold air pipeline which are sequentially connected along the cold air flowing direction, and the lower section cold air pipeline and the upper section cold air pipeline are connected through a flange; the hot air recovery system comprises an upper section hot air pipeline, a lower section hot air pipeline, a dust remover, a waste heat recovery device, a draught fan and an exhaust pipe which are sequentially connected along the flowing direction of hot air, wherein the upper section hot air pipeline and the lower section hot air pipeline are connected through a flange.
2. The system for recycling the waste heat of the damaged molten iron tank as claimed in claim 1, wherein the hoisting device comprises vertical posts arranged at two sides of the recycling device tank cover, and a recycling device lifting mechanism is arranged on the vertical posts and connected with the recycling device tank cover.
3. The system for recycling the waste heat of a damaged molten iron tank of claim 1, wherein the hoisting device is a crown block.
4. The system for recycling waste heat of a damaged molten iron tank according to claim 1, wherein the partition plate is a high temperature resistant metal plate surrounded by asbestos fiber.
5. The system for recycling the waste heat of the damaged molten iron tank as claimed in claim 1, wherein a tank cover connecting device for hoisting is arranged above the tank cover of the recycling device.
6. The system for recovering the waste heat of the damaged molten iron tank according to claim 1, wherein the waste heat recovery device is in a vehicle-mounted form or a fixed form and is externally connected with a heat utilization device.
7. The use method of the system for recovering the waste heat of the damaged molten iron tank as claimed in claim 1, wherein after the converter is finished with iron adding, the molten iron tank car and the molten iron tank judged to be required to be overhauled are returned to the molten iron tank overhaul room, and the molten iron tank car carrying the molten iron tank is stopped under the tank cover of the waste heat recovery device; the method comprises the following steps of (1) dropping a tank cover of the waste heat recovery device, enabling the tank cover to be in tight contact with a hot metal tank, dividing the hot metal tank into two areas by a partition plate, connecting and fixing an upper-section cold air pipeline and a lower-section cold air pipeline by using a flange, connecting and fixing an upper-section hot air pipeline and a lower-section hot air pipeline by using a flange, enabling cold air to flow into the hot metal tank from a cold air inflow nozzle through an air blower via the lower-section cold air pipeline and the upper-section cold air pipeline, exchanging heat with the tank wall on one side of the hot metal tank, enabling the cold air to flow into the other side of the hot metal tank from the bottom of the partition plate, exchanging heat with the tank wall on the other side, and enabling hot air to sequentially flow; the hot air enters the waste heat recovery device after being dedusted in the hot air outflow device and the deduster, and exchanges heat with a heat exchange medium in the waste heat recovery device, so that the heat is recycled, the hot air is cooled and is discharged into the air through the exhaust pipe, and the recycled heat is replaced by the waste heat recovery device through a phase change heat storage technology or a heat conduction oil mode and is used for heating heat utilization equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710196162.0A CN108655383B (en) | 2017-03-29 | 2017-03-29 | System and method for recovering waste heat of damaged hot metal ladle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710196162.0A CN108655383B (en) | 2017-03-29 | 2017-03-29 | System and method for recovering waste heat of damaged hot metal ladle |
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| CN108655383A CN108655383A (en) | 2018-10-16 |
| CN108655383B true CN108655383B (en) | 2020-02-18 |
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| CN201710196162.0A Active CN108655383B (en) | 2017-03-29 | 2017-03-29 | System and method for recovering waste heat of damaged hot metal ladle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2139217Y (en) * | 1992-08-12 | 1993-07-28 | 丁宝太 | Firing self-combustion type refuse incinerator |
| CN100480605C (en) * | 2007-04-27 | 2009-04-22 | 鞍山绿冶热能工程技术有限公司 | Sintering machine cooling circulation exhaust gas residual heat utilization system |
| CN101614484B (en) * | 2008-05-20 | 2011-09-07 | 杨栋 | Method and device for recovering waste heat of non-ferrous metal smelting furnace |
| DE102008042540B4 (en) * | 2008-10-01 | 2010-08-26 | Gvp Gesellschaft Zur Vermarktung Der Porenbrennertechnik Mbh | Device for receiving a molten metal |
| CN102719622B (en) * | 2011-03-29 | 2014-11-05 | 鞍钢股份有限公司 | Method for recycle of steel-making casting-remnant heat-state steel slag |
| CN103234373B (en) * | 2013-03-26 | 2015-12-02 | 中山市多创电器设备有限公司 | Boiler energy-saving waste heat recovery air heater |
| CN205026636U (en) * | 2015-08-02 | 2016-02-10 | 冯培永 | Energy -concerving and environment -protective equipment of boiler waste heat recovery |
| CN205869457U (en) * | 2016-07-19 | 2017-01-11 | 中冶长天国际工程有限责任公司 | Recoverable radiating hot metal bottle conveyer |
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| CN108655383A (en) | 2018-10-16 |
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