CN110628978B - Europeanism top gas cooling waste heat recovery device - Google Patents
Europeanism top gas cooling waste heat recovery device Download PDFInfo
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- CN110628978B CN110628978B CN201911060366.7A CN201911060366A CN110628978B CN 110628978 B CN110628978 B CN 110628978B CN 201911060366 A CN201911060366 A CN 201911060366A CN 110628978 B CN110628978 B CN 110628978B
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- gas
- pipe
- steam
- water heat
- water
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- 239000007789 gas Substances 0.000 title claims abstract description 46
- 238000011084 recovery Methods 0.000 title claims abstract description 9
- 239000002918 waste heat Substances 0.000 title claims abstract description 9
- 238000001816 cooling Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000000428 dust Substances 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 238000003723 Smelting Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 239000003034 coal gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 238000001465 metallisation Methods 0.000 description 4
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/66—Heat exchange
-
- 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
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
The invention discloses a cooling waste heat recovery device for European and metallurgical furnace top gas, wherein a gas pipe of the European and metallurgical furnace is divided into a main pipe and a branch pipe, the tail end of the main pipe is connected with a bag-type dust collector box body, the branch pipe is connected with a gas-water heat exchange device, and a gas outlet at the lower end of the gas-water heat exchange device is communicated with the main pipe through the branch pipe, a gate valve and a metal closed butterfly valve; the steam pipe arranged on the upper portion of one side wall of the steam-water heat exchange device is communicated with a user steam system through an electric regulating valve, a middle water inlet pipe and a middle water return pipe are arranged on one side wall of the steam-water heat exchange device below the steam pipe and are communicated with a heating system to form a circulation loop, a lower water return pipe is respectively arranged on two side walls of the lower portion of the steam-water heat exchange device, the lower water return pipe on one side is communicated with the heating system through a pipeline, and the lower water return pipe on the other side is communicated with the water tank. The invention can reduce the temperature of the gas and simultaneously recover the heat in the gas with reduced temperature to generate steam.
Description
Technical Field
The invention relates to a cooling waste heat recovery device for high-temperature coal gas in dry dedusting of an European smelting furnace.
Background
The front body of the European smelting furnace is a COREX furnace, which is the most advanced COREX in the world, and after being moved from Bao steel to eight steel and modified by a series of process technologies, the European smelting furnace has the technical characteristics of the technology, so the COREX furnace is named as the European smelting furnace. In order to realize the functions of energy conservation and environmental protection, the Er-Mey furnace reforms a COREX top gas filler washer and an adjustable venturi scrubber into a gravity dust removal and dry dust removal system. The dry dedusting gas purification process is adopted to replace the original COREX shaft furnace gas wet dedusting process, the shaft furnace is a process of reducing and releasing heat of CO to reduce ferric oxide, the metallization rate of the shaft furnace is high, and the temperature of top gas is higher. The European smelting furnace technology is a shaft furnace for reducing iron oxide by using high-temperature coal gas, and the temperature of top coal gas reaches 380-400 ℃ after the reduction of the high-yield reduction shaft furnace. In order to adapt to the safe and stable operation of a cloth bag system, the operation of the shaft furnace controls the flow of top gas, reduces the unit consumption of 1180-1200 m/ton of ore gas to 900-1050 m/ton of ore gas, and indirectly reduces the reduction metallization efficiency of the shaft furnace by 5%. The normal working temperature range of the furnace top of the shaft furnace is 150-280 ℃, if the furnace condition fluctuates, the temperature of the gas at the furnace top can reach 600 ℃ under the abnormal working condition, and the dry dust removing cloth bag can only adapt to the working condition of about 200 ℃, otherwise, the cloth bag is burnt or the service life of the cloth bag dust remover is shortened, and the gas quality and the normal production of the European and metallurgical furnace are affected.
Disclosure of Invention
The invention aims to provide a cooling waste heat recovery device for European and metallurgical top gas, which can reduce the temperature of the gas and recover the heat in the gas with reduced temperature to generate steam. The device has simple structure, and can meet the requirements of improving the top temperature of the shaft furnace, improving the metallization rate and the unit consumption of top gas, and reducing the coke ratio and the cost of the European smelting furnace.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a ouye furnace roof gas cooling waste heat recovery device, includes ouye stove, heating system, user steam system and booster pump, deaerator, water tank, sack cleaner, gas-water heat transfer device, and ouye stove gas pipe divide into main pipe and branch pipe, is installed push-pull valve, metal airtight butterfly valve and bypass control valve on the main pipe in proper order, and main pipe end connection sack cleaner box, metal airtight butterfly valve exit end be connected with the branch pipe, the branch pipe is connected with a gas-water heat transfer device, gas-water heat transfer device lower extreme gas outlet is linked together with main pipe through branch pipe and push-pull valve, metal airtight butterfly valve; the steam pipe that is setting up on air-water heat transfer device lateral wall upper portion is linked together with user steam system through electric control valve, is setting up middle part inlet tube and middle part wet return on air-water heat transfer device lateral wall of steam pipe below, middle part inlet tube and middle part wet return with heating system be linked together and constitute the circulation loop, be setting up a lower part wet return on air-water heat transfer device lower part both sides wall respectively, the lower part wet return of one side is linked together through the pipeline with heating system, the lower part wet return of opposite side is linked together through high-pressure pump, deaerator, booster pump in proper order with the water tank.
The device can ensure that the temperature of the inlet gas entering the gas bag dust collector is controllable between 150 ℃ and 240 ℃, the facility has the capability of resisting abrasion of gas dust, corrosion of chloride ions and sulfides in the gas and the influence of gas temperature fluctuation, can be safely cut out in maintenance without influencing the normal production of the system, has an adjusting function on the stable operation of a gas system of the European smelting furnace, and is beneficial to perfecting the technology of the ironmaking process of the European smelting furnace.
When the temperature of the top gas in the abnormal process such as emptying of the shaft furnace is lower than 120 ℃, the gas directly enters the cloth bag system without passing through the branch pipe, so that the temperature of the gas is always above the dew point, and the problem of water precipitation is prevented. The invention can prolong the service life of the filter bag of the bag-type dust collector from 1 year to 1.5 years; the service life of a sealing ring of the gas equipment is prolonged from 15 days to 3 months; the top temperature control of the shaft furnace is relaxed, the metallization rate is improved by 5%, the fuel ratio is reduced by 20kg/tHM, and the safe operation of the system is ensured.
The invention adopts advanced gas waste heat recovery technology, the heat exchange tube in the gas-water heat exchange device adopts a light tube, the gas flow rate is more than 20m/s along the vertical direction, ash deposition is avoided, and the gas-water heat exchange device has certain self-cleaning capability. The steam outlet is provided with an electric regulating valve, so that the steam pressure can be regulated according to the requirements of users, and the gas temperature at the outlet of the heat exchanger can be regulated. And the design optimization of the internal circulation pipeline ensures that the natural circulation of water vapor is smooth under different working conditions. In the gas-water heat exchange device, high-temperature gas flows into a heat exchange tube, water-water vapor is outside the heat exchange tube (in a shell), the high-temperature gas transfers heat through a dividing wall type, water in the shell pass of the heat exchange tube is heated, water vapor is generated, and the water vapor is naturally circulated into a steam drum through an internal circulation pipeline, so that the aim of controlling the high-temperature gas within a process requirement range and simultaneously producing byproduct steam is fulfilled.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a front view structure of the present invention.
Detailed Description
The utility model provides a ouye furnace roof gas cooling waste heat recovery device, as shown in fig. 1, including ouye furnace 1, heating system 9, user steam system 8 and booster pump 13, deaerator 10, water tank 14, sack cleaner 5, gas-water heat transfer device 6 is prior art, vertical evenly spaced has set up the coal gas passageway in the long cylindrical casing, seal between coal gas passageway and the gas-water heat transfer device casing and set up water-water vapor chamber, the circulating water in the high temperature gas heating water-water vapor chamber that passes in the coal gas passageway, heated water can heat, boiling water produces high temperature steam and gets into user steam system. The gas pipe of the European smelting furnace is divided into a main pipe 3 and a branch pipe 15, a gate valve, a metal closed butterfly valve 2 and a bypass control valve 4 are sequentially arranged on the main pipe 3, the tail end of the main pipe 3 is connected with a box body of a bag-type dust collector 5, the outlet end of the metal closed butterfly valve 2 is connected with the branch pipe 15, the branch pipe 15 is connected with a gas-water heat exchange device 6, and the gas outlet at the lower end of the gas-water heat exchange device 6 is communicated with the main pipe 3 through the branch pipe, the gate valve and the metal closed butterfly valve 12; the steam pipe arranged on the upper part of one side wall of the air-water heat exchange device 6 is communicated with a user steam system 8 through an electric regulating valve 7, and the middle water inlet pipe and the middle water return pipe are arranged on one side wall of the air-water heat exchange device below the steam pipe and are communicated with a heating system 9 to form a circulation loop. The two side walls of the lower part of the air-water heat exchange device 6 are respectively provided with a lower return pipe, the lower return pipe on one side is communicated with the heating system 9 through a pipeline 16, and the lower return pipe on the other side is communicated with the water tank 14 through a high-pressure pump 11, a deaerator 10 and a booster pump 13 in sequence.
Claims (1)
1. The utility model provides a ouye top gas cooling waste heat recovery device, includes ouye stove, heating system, user steam system and booster pump, deaerator, water tank, sack cleaner, gas-water heat transfer device, characterized by: the gas pipe of the European smelting furnace is divided into a main pipe and a branch pipe, a gate valve, a metal closed butterfly valve and a bypass control valve are sequentially arranged on the main pipe, the tail end of the main pipe is connected with a box body of the bag-type dust collector, the outlet end of the metal closed butterfly valve is connected with the branch pipe, the branch pipe is connected with a gas-water heat exchange device, and a gas outlet at the lower end of the gas-water heat exchange device is communicated with the main pipe through the branch pipe, the gate valve and the metal closed butterfly valve; the steam pipe that is setting up on air-water heat transfer device lateral wall upper portion is linked together with user steam system through electric control valve, is setting up middle part inlet tube and middle part wet return on air-water heat transfer device lateral wall of steam pipe below, middle part inlet tube and middle part wet return with heating system be linked together and constitute the circulation loop, be setting up a lower part wet return on air-water heat transfer device lower part both sides wall respectively, the lower part wet return of one side is linked together through the pipeline with heating system, the lower part wet return of opposite side is linked together through high-pressure pump, deaerator, booster pump in proper order with the water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911060366.7A CN110628978B (en) | 2019-11-01 | 2019-11-01 | Europeanism top gas cooling waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911060366.7A CN110628978B (en) | 2019-11-01 | 2019-11-01 | Europeanism top gas cooling waste heat recovery device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110628978A CN110628978A (en) | 2019-12-31 |
| CN110628978B true CN110628978B (en) | 2024-05-14 |
Family
ID=68978852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911060366.7A Active CN110628978B (en) | 2019-11-01 | 2019-11-01 | Europeanism top gas cooling waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110628978B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115921498A (en) * | 2022-10-18 | 2023-04-07 | 新疆八一钢铁股份有限公司 | Method for harmless treatment of hazardous waste desulfurizer by using Europe smelting furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570807A (en) * | 2009-05-31 | 2009-11-04 | 中冶京诚工程技术有限公司 | Steelmaking converter gas purification and waste heat recovery system |
| CN102851420A (en) * | 2012-09-12 | 2013-01-02 | 首钢总公司 | Steelmaking residual heat step recycling method |
| CN106929626A (en) * | 2017-02-25 | 2017-07-07 | 秦皇岛同力达环保能源股份有限公司 | Coal gas of steel-smelting revolving furnace dedusting waste heat reclaiming process and system |
| CN210886094U (en) * | 2019-11-01 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Ou ye furnace roof coal gas cooling waste heat recovery device |
-
2019
- 2019-11-01 CN CN201911060366.7A patent/CN110628978B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570807A (en) * | 2009-05-31 | 2009-11-04 | 中冶京诚工程技术有限公司 | Steelmaking converter gas purification and waste heat recovery system |
| CN102851420A (en) * | 2012-09-12 | 2013-01-02 | 首钢总公司 | Steelmaking residual heat step recycling method |
| CN106929626A (en) * | 2017-02-25 | 2017-07-07 | 秦皇岛同力达环保能源股份有限公司 | Coal gas of steel-smelting revolving furnace dedusting waste heat reclaiming process and system |
| CN210886094U (en) * | 2019-11-01 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Ou ye furnace roof coal gas cooling waste heat recovery device |
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| Publication number | Publication date |
|---|---|
| CN110628978A (en) | 2019-12-31 |
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