CN113046504A - Blast furnace production system utilizing waste heat, residual pressure and residual cooling - Google Patents
Blast furnace production system utilizing waste heat, residual pressure and residual cooling Download PDFInfo
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- CN113046504A CN113046504A CN202110288907.2A CN202110288907A CN113046504A CN 113046504 A CN113046504 A CN 113046504A CN 202110288907 A CN202110288907 A CN 202110288907A CN 113046504 A CN113046504 A CN 113046504A
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- heat exchanger
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- residual
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000002918 waste heat Substances 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 80
- 238000002156 mixing Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000000498 cooling water Substances 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 239000002699 waste material Substances 0.000 abstract description 27
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 2
- 239000002893 slag Substances 0.000 description 14
- 238000011010 flushing procedure Methods 0.000 description 12
- 239000003034 coal gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/14—Preheating the combustion air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a blast furnace production system utilizing waste heat, waste pressure and waste cooling, which comprises: the system comprises a blast furnace, a mixing heat exchanger, a sprayer, a turbine, a generator set, a blast furnace gas heat exchanger, an air heat exchanger, a hot blast furnace and an induced draft fan; the blast furnace gas outlet is connected with a mixing heat exchanger, the mixing heat exchanger is sequentially connected with a sprayer and a turbine, and the turbine is coaxially connected with a generator set; the turbine is sequentially connected with a blast furnace gas heat exchanger, a mixing heat exchanger and a hot blast furnace inlet, a hot blast furnace outlet is connected with the blast furnace inlet, and a draught fan is connected with an air inlet of the hot blast furnace; the water-cooled wall heat exchange tube is sequentially connected with the air heat exchanger and the blast furnace gas heat exchanger; the air heat exchanger is connected with the mixing heat exchanger and the inlet of the hot blast stove in sequence. The invention realizes the co-production and co-supply of cold, heat and electricity multistrand energy by reasonably recycling the heat energy of the blast furnace gas, saves resources, protects the environment and has great economic and ecological benefits.
Description
Technical Field
The invention belongs to the technical field of blast furnace energy systems, and relates to a blast furnace production system utilizing waste heat, waste pressure and waste cooling.
Background
In the blast furnace smelting production process, about 0.3t of blast furnace slag is generated every 1t of molten iron, and the heat taken away by the blast furnace slag accounts for about 18 percent of the total energy consumption of the blast furnace. Most of steel plants in China utilize slag flushing water for cooling treatment, so that the slag flushing water takes away a large amount of heat, the temperature of the slag flushing water can reach about 85-110 ℃, and the slag flushing water not only causes a large amount of energy waste but also causes water resource waste and heat pollution in the circulating process.
At present, the technologies for recycling the waste heat of the slag flushing water mainly comprise the following types:
open slag flushing water waste heat utilization system: the system is used for heating after filtering the slag flushing water, and due to the characteristics of high hardness and alkalinity of the slag flushing water, after the system is operated for a period of time, a pipe network and a terminal facility are easy to block and corrode, the heating time for most of China is short, the system investment return rate is low, and the system is not easy to popularize.
Chinese patent 201210135630.0 discloses a method and a system for recovering waste heat of INBA slag flushing water of a blast furnace. The system provides that slag flushing water enters a heat exchanger after being filtered and pressurized to exchange heat with water for hot users. Although the user terminal is protected, the introduced heat exchanger still has the problems of blockage and corrosion, the temperature of the slag flushing water is not high originally, the temperature of hot user water is lower after heat exchange, and the water is difficult to be effectively utilized, meanwhile, a blast furnace generates a large amount of waste heat, and simultaneously, a large amount of residual pressure and residual cold are not utilized, so that the energy waste is caused, and the system does not solve the problem.
Chinese patent 200810157561.7 proposes a closed slag flushing water waste heat heating system. The system provides that the plate-fin heat absorber is arranged in a hot water tank, absorbs the heat of the hot water tank and then is sent out for heating through a water pump and a steam reheater. The heat absorption gas in the hot water tank adopts immersion, so that the surface water flow speed is low, the heat exchange effect is poor, and the problems of scaling and corrosion also exist on the surface of the heat absorber. This system also does not address the problem of excess pressure and cold not being utilized.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a blast furnace production system utilizing waste heat, waste pressure and waste cooling, which utilizes the novel technology of generating power by utilizing the waste pressure and cooling in a furnace by utilizing the waste cooling while recovering the waste heat, improves the energy utilization rate and plays a positive environmental protection role to the environment.
The invention provides a blast furnace production system utilizing waste heat, waste pressure and waste cooling, which comprises: the system comprises a blast furnace, a mixing heat exchanger, a sprayer, a turbine, a generator set, a blast furnace gas heat exchanger, an air heat exchanger, a hot blast furnace and an induced draft fan; the gas outlet of the blast furnace is connected with a gas side inlet of the blast furnace of the mixed heat exchanger through a pipeline, a gas side outlet of the blast furnace of the mixed heat exchanger is connected with a sprayer and a turbine through pipelines in sequence, and the turbine is coaxially connected with a generator set; the exhaust gas outlet of the turbine is connected with a blast furnace gas side inlet of a blast furnace gas heat exchanger through a pipeline, the blast furnace gas side outlet of the blast furnace gas heat exchanger is connected with an external gas side inlet of a mixing heat exchanger through a pipeline, the external gas side outlet of the mixing heat exchanger is connected with an inlet of a hot blast stove through a pipeline, the outlet of the hot blast stove is connected with the inlet at the bottom of the blast furnace, and a draught fan is connected with an air inlet of the hot blast stove; the outlet of the water-cooled wall heat exchange tube in the blast furnace is sequentially connected with the cooling water sides of the air heat exchanger and the blast furnace gas heat exchanger through pipelines, and the outlet of the cooling water side of the blast furnace gas heat exchanger is connected with the inlet of the water-cooled wall heat exchange tube; the air side outlet of the air heat exchanger is connected with the air side inlet of the mixing heat exchanger through a pipeline, and the air side outlet of the mixing heat exchanger is connected with the inlet of the hot blast stove through a pipeline.
In the blast furnace production system utilizing the waste heat, the waste pressure and the waste cooling, a first regulating valve is arranged on a pipeline connecting the blast furnace and the mixed heat exchanger.
In the blast furnace production system utilizing the waste heat, the waste pressure and the waste cooling, a second regulating valve is arranged on a pipeline connecting the blast furnace gas heat exchanger and the water-cooled wall heat exchange tube of the blast furnace.
In the blast furnace production system utilizing the waste heat, the waste pressure and the waste cooling, a third regulating valve is arranged on a pipeline connecting the external gas side of the mixing heat exchanger and the hot blast stove; and a fourth regulating valve is arranged on a pipeline connecting the air side of the mixing heat exchanger and the hot blast stove.
In the blast furnace production system utilizing the waste heat, the waste pressure and the waste cooling, a heat source of the mixed heat exchanger is blast furnace gas entering the blast furnace gas side of the mixed heat exchanger, and a cold source of the mixed heat exchanger is cold air entering the air side of the mixed heat exchanger from an air heat exchanger and low-temperature low-pressure blast furnace gas entering the external gas side of the mixed heat exchanger from the blast furnace heat exchanger.
In the blast furnace production system utilizing the waste heat, the waste pressure and the waste cold, the heat sources of the blast furnace heat exchanger and the air heat exchanger are furnace wall cooling water in the water-cooled wall heat exchange pipe.
In the blast furnace production system utilizing waste heat, waste pressure and waste cooling, the turbine is a screw turbine.
The blast furnace production system utilizing the residual heat, the residual pressure and the residual cold has the following beneficial effects:
1. the blast furnace production system of the invention takes the heat energy of the medium-low temperature blast furnace gas and the cooling water of the furnace wall as heat sources, and realizes the reasonable utilization of the waste heat, reduces the consumption of non-renewable energy sources and avoids the pollution to the environment by preheating the air and the blast furnace gas;
2. the blast furnace production system takes the low-temperature blast furnace gas expanded by the turbine as a cold source, improves the efficiency of a refrigeration system, and realizes the low-temperature cooling of furnace wall cooling water;
3. the blast furnace production system of the invention takes the cooling water of the middle-low temperature furnace wall as the heat source, improves the utilization efficiency of the waste heat and realizes the primary preheating of the air and the coal gas;
4. the blast furnace production system of the invention takes the medium-low temperature blast furnace gas as a heat source, improves the utilization efficiency of waste heat, and realizes secondary preheating of air and gas;
5. the air and the coal gas introduced into the hot blast stove in the blast furnace production system are the gas subjected to primary preheating and secondary preheating, so that the combustion effect is enhanced, and the expected combustion temperature is more easily reached.
Drawings
FIG. 1 is a schematic diagram of a blast furnace production system utilizing residual heat, residual pressure and residual cooling according to the present invention.
The system comprises a blast furnace 1, a water-cooled wall heat exchange tube 2, a gas outlet 3, a first regulating valve 5, a mixed heat exchanger 6, a sprayer 7, a turbine 8, a generator set 9, a blast furnace gas heat exchanger 10, an air heat exchanger 11, a second regulating valve 12, an induced draft fan 13, a third regulating valve 14, a fourth regulating valve 15 and a hot blast furnace 16.
Detailed Description
The blast furnace production system using residual heat, residual pressure and residual cooling of the present invention as shown in fig. 1 comprises: the system comprises a blast furnace 1, a mixing heat exchanger 6, a sprayer 7, a turbine 8, a generator set 9, a blast furnace gas heat exchanger 10, an air heat exchanger 11, a hot blast stove 16 and an induced draft fan 13. The gas outlet 3 of the blast furnace 1 is connected with a blast furnace gas side inlet of a mixed heat exchanger 6 through a pipeline, a blast furnace gas side outlet of the mixed heat exchanger 6 is connected with a sprayer 7 and a turbine 8 through pipelines in sequence, the turbine 8 is coaxially connected with a generator set 9, and the turbine adopts a screw type turbine. The exhaust gas outlet of the turbine 8 is connected with the blast furnace gas side inlet of the blast furnace gas heat exchanger 10 through a pipeline, the blast furnace gas side outlet of the blast furnace gas heat exchanger 10 is connected with the external gas side inlet of the mixing heat exchanger 6 through a pipeline, the external gas side outlet of the mixing heat exchanger 6 is connected with the inlet of the hot blast stove 16 through a pipeline, the outlet of the hot blast stove 16 is connected with the inlet at the bottom of the blast furnace 1, and the induced draft fan 13 is connected with the air inlet of the hot blast stove 16. The outlet of the water-cooled wall heat exchange tube 2 in the blast furnace 1 is sequentially connected with the cooling water sides of the air heat exchanger 11 and the blast furnace gas heat exchanger 10 through pipelines, and the outlet of the cooling water side of the blast furnace gas heat exchanger 10 is connected with the inlet of the water-cooled wall heat exchange tube 2. The air side outlet of the air heat exchanger 11 is connected with the air side inlet of the mixing heat exchanger 6 through a pipeline, and the air side outlet of the mixing heat exchanger 6 is connected with the inlet of the hot blast stove 16 through a pipeline.
In specific implementation, a first regulating valve 5 is arranged on a pipeline connecting the blast furnace 1 and the mixed heat exchanger 6. And a second regulating valve 12 is arranged on a pipeline connecting the blast furnace gas heat exchanger 10 and the water-cooled wall heat exchange tube 2 of the blast furnace. A third regulating valve 14 is arranged on a pipeline connecting the external gas side of the mixing heat exchanger 6 with the hot blast stove 16; a fourth regulating valve 15 is arranged on a pipeline connecting the air side of the mixing heat exchanger 6 with the hot blast stove 16.
The heat source of the mixed heat exchanger 6 is low-temperature high-pressure coal gas entering the blast furnace gas side of the mixed heat exchanger, and the cold source is cold air entering the air side of the mixed heat exchanger from the air heat exchanger 11 and low-temperature low-pressure high-pressure coal gas entering the external coal gas side of the mixed heat exchanger from the blast furnace heat exchanger 10. The heat source of the blast furnace heat exchanger 10 and the air heat exchanger 11 is furnace wall cooling water in the water wall heat exchange tube 2.
The working process is as follows:
(1) the blast furnace gas reaches a gas outlet hearth opening 3 from a reduction chamber of a blast furnace 1, enters a first regulating valve 5 at the temperature of 140 ℃, then is subjected to secondary heat exchange with low-temperature low-pressure blast furnace gas and cold air through a mixed heat exchanger 6, enters a spray chamber 7 after being combusted for wet dust removal, the blast furnace gas after dust removal enters a turbine 8 for expansion and work application, a generator set 9 converts the blast furnace gas into electric energy, the pressure of the blast furnace gas is reduced to 0.03MPa, and low-temperature low-pressure exhaust gas after the temperature is reduced to 5 ℃ enters a blast furnace gas heat exchanger 10 through an exhaust gas outlet of the turbine to absorb the waste heat of furnace wall cooling water. Then the mixture is preheated for the second time by the mixing heat exchanger 6, enters the hot blast stove 16 for combustion, and finally the heated hot blast is conveyed into the blast furnace 1 through the hot blast heater 13 for oxidation-reduction reaction. (2) The furnace wall cooling water in the water-cooled wall heat exchange tube 2 flows through the air heat exchanger 11 after absorbing heat by the furnace wall, the cold air at the ambient temperature is heated and then flows through the blast furnace gas heat exchanger 10, the low-temperature low-pressure blast furnace gas at the temperature of 4 ℃ is heated, the temperature of the furnace wall cooling water is reduced to the specified temperature, and the furnace wall cooling water flows into the water-cooled wall heat exchange tube 2 again through the second regulating valve 12 to be cooled, so that the furnace wall cooling water can be recycled. (3) After absorbing heat from the air heat exchanger 11 and raising the temperature, the air flows into the mixing preheater 6 for secondary preheating and raising the temperature, and finally enters the hot blast stove 16 for combustion. The recycling process of the waste heat, the waste pressure and the waste cold in the system is completed through the processes.
The blast furnace production system utilizing the residual heat, the residual pressure and the residual cold realizes the green and efficient blast furnace production system for the combined supply of cold, heat and electricity multi-strand energy sources by reasonably utilizing the heat of the medium-low temperature blast furnace gas and the furnace wall cooling water. The problems of environmental pollution, high energy, low use, low efficiency and the like of the traditional energy system are solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined by the appended claims.
Claims (7)
1. The utility model provides an utilize blast furnace production system of waste heat, excess pressure, excess cold which characterized in that includes: the system comprises a blast furnace, a mixing heat exchanger, a sprayer, a turbine, a generator set, a blast furnace gas heat exchanger, an air heat exchanger, a hot blast furnace and an induced draft fan; the gas outlet of the blast furnace is connected with a gas side inlet of the blast furnace of the mixed heat exchanger through a pipeline, a gas side outlet of the blast furnace of the mixed heat exchanger is connected with a sprayer and a turbine through pipelines in sequence, and the turbine is coaxially connected with a generator set; the exhaust gas outlet of the turbine is connected with a blast furnace gas side inlet of a blast furnace gas heat exchanger through a pipeline, the blast furnace gas side outlet of the blast furnace gas heat exchanger is connected with an external gas side inlet of a mixing heat exchanger through a pipeline, the external gas side outlet of the mixing heat exchanger is connected with an inlet of a hot blast stove through a pipeline, the outlet of the hot blast stove is connected with the inlet at the bottom of the blast furnace, and a draught fan is connected with an air inlet of the hot blast stove; the outlet of the water-cooled wall heat exchange tube in the blast furnace is sequentially connected with the cooling water sides of the air heat exchanger and the blast furnace gas heat exchanger through pipelines, and the outlet of the cooling water side of the blast furnace gas heat exchanger is connected with the inlet of the water-cooled wall heat exchange tube; the air side outlet of the air heat exchanger is connected with the air side inlet of the mixing heat exchanger through a pipeline, and the air side outlet of the mixing heat exchanger is connected with the inlet of the hot blast stove through a pipeline.
2. The blast furnace production system utilizing residual heat, residual pressure and residual cold according to claim 1, wherein a first regulating valve is arranged on a pipeline connecting the blast furnace and the mixing heat exchanger.
3. The blast furnace production system utilizing residual heat, residual pressure and residual cold as claimed in claim 1, wherein a second regulating valve is arranged on a pipeline connecting the blast furnace gas heat exchanger and the water-cooled wall heat exchange tube of the blast furnace.
4. The blast furnace production system utilizing residual heat, residual pressure and residual cold according to claim 1, wherein a third regulating valve is arranged on a pipeline connecting an external gas side of the mixing heat exchanger with the hot blast stove; and a fourth regulating valve is arranged on a pipeline connecting the air side of the mixing heat exchanger and the hot blast stove.
5. The blast furnace production system using residual heat, residual pressure and residual cold according to claim 1, wherein the heat source of the hybrid heat exchanger is blast furnace gas entering the blast furnace gas side thereof, and the heat source is cold air entering the air side thereof from the air heat exchanger and low-temperature low-pressure blast furnace gas entering the external gas side thereof from the blast furnace heat exchanger.
6. The blast furnace production system utilizing residual heat, residual pressure and residual cold according to claim 1, wherein the heat source of the blast furnace heat exchanger and the air heat exchanger is furnace wall cooling water in a water wall heat exchange pipe.
7. The blast furnace production system using residual heat, pressure and cooling according to claim 1, wherein the turbine is a screw turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110288907.2A CN113046504B (en) | 2021-03-18 | 2021-03-18 | Blast furnace production system utilizing waste heat, residual pressure and residual cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110288907.2A CN113046504B (en) | 2021-03-18 | 2021-03-18 | Blast furnace production system utilizing waste heat, residual pressure and residual cooling |
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| CN113046504A true CN113046504A (en) | 2021-06-29 |
| CN113046504B CN113046504B (en) | 2022-06-21 |
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| CN202110288907.2A Expired - Fee Related CN113046504B (en) | 2021-03-18 | 2021-03-18 | Blast furnace production system utilizing waste heat, residual pressure and residual cooling |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144848A (en) * | 1996-09-13 | 1997-03-12 | 冶金工业部钢铁研究总院 | Whole-dry type dust removing device and method for blast furnace gas |
| KR20030018157A (en) * | 2001-08-27 | 2003-03-06 | 재단법인 포항산업과학연구원 | System for High Temperature Waste Heat Recovery from Molten Slag in Cooling Process |
| CN200955054Y (en) * | 2006-09-13 | 2007-10-03 | 童裳慧 | Novel blast-furnace after-heat recovering-utilizing system |
| CN102851420A (en) * | 2012-09-12 | 2013-01-02 | 首钢总公司 | Steelmaking residual heat step recycling method |
| CN102876824A (en) * | 2012-09-12 | 2013-01-16 | 首钢总公司 | Method for guaranteeing high blast temperature by using blast furnace gas |
| CN102994677A (en) * | 2012-08-22 | 2013-03-27 | 浙江西子联合工程有限公司 | System and method for power generation utilizing waste heat of tail waste gas of blast-furnace hot blast stove |
| CN103866070A (en) * | 2014-04-09 | 2014-06-18 | 陕西三沅重工发展股份有限公司 | Low-grade waste heat recycling system and method for flue gas of hot blast stove |
| CN105385801A (en) * | 2015-11-27 | 2016-03-09 | 中冶南方工程技术有限公司 | Waste heat utilization system for cooling wall of blast furnace and application method of waste heat utilization system |
| CN105695649A (en) * | 2016-04-15 | 2016-06-22 | 中冶华天工程技术有限公司 | Distributed energy source system based on blast furnace iron making |
-
2021
- 2021-03-18 CN CN202110288907.2A patent/CN113046504B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144848A (en) * | 1996-09-13 | 1997-03-12 | 冶金工业部钢铁研究总院 | Whole-dry type dust removing device and method for blast furnace gas |
| KR20030018157A (en) * | 2001-08-27 | 2003-03-06 | 재단법인 포항산업과학연구원 | System for High Temperature Waste Heat Recovery from Molten Slag in Cooling Process |
| CN200955054Y (en) * | 2006-09-13 | 2007-10-03 | 童裳慧 | Novel blast-furnace after-heat recovering-utilizing system |
| CN102994677A (en) * | 2012-08-22 | 2013-03-27 | 浙江西子联合工程有限公司 | System and method for power generation utilizing waste heat of tail waste gas of blast-furnace hot blast stove |
| CN102851420A (en) * | 2012-09-12 | 2013-01-02 | 首钢总公司 | Steelmaking residual heat step recycling method |
| CN102876824A (en) * | 2012-09-12 | 2013-01-16 | 首钢总公司 | Method for guaranteeing high blast temperature by using blast furnace gas |
| CN103866070A (en) * | 2014-04-09 | 2014-06-18 | 陕西三沅重工发展股份有限公司 | Low-grade waste heat recycling system and method for flue gas of hot blast stove |
| CN105385801A (en) * | 2015-11-27 | 2016-03-09 | 中冶南方工程技术有限公司 | Waste heat utilization system for cooling wall of blast furnace and application method of waste heat utilization system |
| CN105695649A (en) * | 2016-04-15 | 2016-06-22 | 中冶华天工程技术有限公司 | Distributed energy source system based on blast furnace iron making |
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| CN113046504B (en) | 2022-06-21 |
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Granted publication date: 20220621 |