CN104894310A - Blast furnace slag-flushing waste heat recovery steam-flue gas heat exchange technology - Google Patents
Blast furnace slag-flushing waste heat recovery steam-flue gas heat exchange technology Download PDFInfo
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- CN104894310A CN104894310A CN201510159225.6A CN201510159225A CN104894310A CN 104894310 A CN104894310 A CN 104894310A CN 201510159225 A CN201510159225 A CN 201510159225A CN 104894310 A CN104894310 A CN 104894310A
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- 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
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Abstract
The invention relates to a blast furnace slag-flushing waste heat recovery steam-flue gas heat exchange technology, which belongs to the technical field of blast furnace ironmaking slag waste heat recovery. The technology comprises the following steps: while working, an electric gate valve is closed, a first electric gate valve is opened for introducing the water slag steam, a second electric gate valve is opened for introducing high temperature flue gas in a hot-blast stove; steam generated in a water slag-washing process passes through a steam pipeline, is purified through a steam purifier, harmful impurity is removed; steam and high temperature flue gas in the hot-blast stove are introduced in a steam-flue gas heat exchanger, temperature of the water slag steam is increased, the steam is finally introduced into a steam jet heat pump, and then is mixed with high temperature steam in a pipe network to form the steam which can be used. The technology has the advantages that production cost of a steel factory is reduced, and energy saving and consumption reduction effects are realized.
Description
Technical field
The invention belongs to blast furnace ironmaking melting slag waste heat recovery technology field, particularly a kind of blast furnace slag flushing heat recovery steam-flue gas heat exchange technique.The blast furnace slag flushing system waste heat being applicable to any rank reclaims.
Background technology
In blast furnace ironmaking smelting process, the slag temperature of generation is approximately 1500 DEG C, and the high velocity flow that this slag is provided by slag-washing-out pump in Punched box is granulated rapidly and is cooled to grain slag fast.The steam of a large amount of 100 DEG C and temperature can be produced at the low-temperature water heating of 80-95 DEG C in this process.In current grain slag production technique, steam is all directly diffuse, and wastes a large amount of heats.And washing slag water is in order to ensure the safe operation of system, be then generally enter cooling tower after sedimentation and filtration, circulate after cooling flushing cinder again.Make so again a part of heat run off in cooling tower, both wasted the energy, and polluted environment again.Blast furnace slag heat recovery technology is subject to the attention of countries in the world day by day, and its main direction of studying is dry Slag treatment method, but due to its produce dry slag temperature high, equipment repair and maintenance difficulty, the waste residue of generation stores nowhere, is not unanimously promoted and applies.And reclaiming because its temperature is lower for the Low Temperature Steam that flush slag produces, heat energy utilization difficulty, also never has new progress.
Summary of the invention
The object of the present invention is to provide a kind of blast furnace slag flushing heat recovery steam-flue gas heat exchange technique, solve the problem that low temperature and low pressure steam is not easy to reclaim.
A kind of blast furnace slag flushing heat recovery steam-flue gas heat exchange technique, concrete steps are as follows:
1, during work, electric gate valve 1 is closed, and stop the discharge of steam in grain slag chimney, the first electric gate valve 2 is opened, and allows water granulated slag steam enter, and the second electric gate valve 6 is opened, and allows hotblast stove high-temperature flue gas enter;
S and S compound in steam, by steam-pipe, through steam purifier 3 by after steam purification, is removed, is removed detrimental impurity by the steam 2, produced in flush slag process;
3, the steam that produces of flush slag and the high-temperature flue gas of hotblast stove enter steam-flue gas heat-exchange unit 5 jointly, and water granulated slag steam is by the heat absorption of flue gas, and the complete flue gas of heat exchange is through hotblast stove smoke stack emission;
4, water granulated slag steam temperature finally enters steam jet heat pump 4 after improving, and with mixing of pipe network high temperature and high pressure steam, forms utilizable steam.
5, under idle state, electric gate valve 1 is opened, and washing slag water is directly discharged from grain slag chimney, and the first electric gate valve 2, second electric gate valve 6 is closed.
The invention has the advantages that:
1, design steam purifier, S and the S compound in steam is removed, prevents the corrosion to system.
2, the higher steam of temperature can be obtained by steam flue gas heat-exchange unit.
3, the steam with certain pressure can be obtained by steam jet heat pump.
4, reduce the production cost of Steel Plant, play energy-saving and cost-reducing effect.
Accompanying drawing explanation
Fig. 1 is steam-smoke heat exchanging system process flow sheet.Wherein, electric gate valve 1, first electric gate valve 2, steam purifier 3, steam jet heat pump 4, steam flue gas heat-exchange unit 5, second electric gate valve 6.
Embodiment
Embodiment 1
A kind of blast furnace slag flushing heat recovery steam-flue gas heat exchange technique, concrete steps are as follows:
1, during work, electric gate valve 1 is closed, and stop the discharge of steam in grain slag chimney, the first electric gate valve 2 is opened, and allows water granulated slag steam enter, and the second electric gate valve 6 is opened, and allows hotblast stove high-temperature flue gas enter;
S and S compound in steam, by steam-pipe, through steam purifier 3 by after steam purification, is removed, is removed detrimental impurity by the steam 2, produced in flush slag process;
3, the steam that produces of flush slag and the high-temperature flue gas of hotblast stove enter steam-flue gas heat-exchange unit 5 jointly, and water granulated slag steam is by the heat absorption of flue gas, and the complete flue gas of heat exchange is through hotblast stove smoke stack emission;
4, temperature finally enters steam jet heat pump 4 after improving, and with mixing of pipe network high temperature and high pressure steam, forms utilizable steam.
Claims (1)
1. blast furnace slag flushing heat recovery steam-flue gas heat exchange technique, it is characterized in that, concrete steps are as follows:
1) during work, electric gate valve (1) is closed, and stops the discharge of steam in grain slag chimney, first electric gate valve (2) is opened, allow water granulated slag steam enter, the second electric gate valve (6) is opened, and allows hotblast stove high-temperature flue gas enter;
2) S and the S compound in steam, by steam-pipe, through steam purifier (3) by after steam purification, is removed, is removed detrimental impurity by the steam produced in flush slag process;
3) steam that produces of flush slag and the high-temperature flue gas of hotblast stove enter steam-flue gas heat-exchange unit (5) jointly, and water granulated slag steam is by the heat absorption of flue gas, and the complete flue gas of heat exchange is through hotblast stove smoke stack emission;
4) water granulated slag steam temperature finally enters steam jet heat pump (4) after improving, and with mixing of pipe network high temperature and high pressure steam, forms utilizable steam;
5) under idle state, electric gate valve (1) is opened, and washing slag water is directly discharged from grain slag chimney, the first electric gate valve (2), and the second electric gate valve (6) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510159225.6A CN104894310B (en) | 2015-04-06 | 2015-04-06 | Blast furnace slag-flushing waste heat recovery steam-flue gas heat exchange technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510159225.6A CN104894310B (en) | 2015-04-06 | 2015-04-06 | Blast furnace slag-flushing waste heat recovery steam-flue gas heat exchange technology |
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| Publication Number | Publication Date |
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| CN104894310A true CN104894310A (en) | 2015-09-09 |
| CN104894310B CN104894310B (en) | 2017-04-19 |
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| CN201510159225.6A Active CN104894310B (en) | 2015-04-06 | 2015-04-06 | Blast furnace slag-flushing waste heat recovery steam-flue gas heat exchange technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107815514A (en) * | 2017-12-07 | 2018-03-20 | 中冶京诚工程技术有限公司 | The system and recovery method of washing slag water Steam Recovery and the white haze that disappears |
| CN109182626A (en) * | 2018-10-08 | 2019-01-11 | 哈尔滨工大金涛科技股份有限公司 | Flue gas type slag steam of quenching disappears white device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363067A (en) * | 2008-09-27 | 2009-02-11 | 袁长胜 | Combined double preheating device |
| WO2011023455A1 (en) * | 2009-08-24 | 2011-03-03 | Polysius Ag | Method for producing slag granulate and for recuperating heat from liquid melts |
| CN102424868A (en) * | 2012-01-12 | 2012-04-25 | 安徽工业大学 | Blast furnace smelting slag water quenching waste steam waste heat recovery system |
| CN103981306A (en) * | 2014-05-25 | 2014-08-13 | 北京首钢国际工程技术有限公司 | Method and device for recycling waste heat in molten slag water quenching and granulating process of ironmaking blast furnace |
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2015
- 2015-04-06 CN CN201510159225.6A patent/CN104894310B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363067A (en) * | 2008-09-27 | 2009-02-11 | 袁长胜 | Combined double preheating device |
| WO2011023455A1 (en) * | 2009-08-24 | 2011-03-03 | Polysius Ag | Method for producing slag granulate and for recuperating heat from liquid melts |
| CN102424868A (en) * | 2012-01-12 | 2012-04-25 | 安徽工业大学 | Blast furnace smelting slag water quenching waste steam waste heat recovery system |
| CN103981306A (en) * | 2014-05-25 | 2014-08-13 | 北京首钢国际工程技术有限公司 | Method and device for recycling waste heat in molten slag water quenching and granulating process of ironmaking blast furnace |
Non-Patent Citations (1)
| Title |
|---|
| 王铁民: "高炉冲渣余热回收的试验研究与利用分析", 《冶金动力》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107815514A (en) * | 2017-12-07 | 2018-03-20 | 中冶京诚工程技术有限公司 | The system and recovery method of washing slag water Steam Recovery and the white haze that disappears |
| CN109182626A (en) * | 2018-10-08 | 2019-01-11 | 哈尔滨工大金涛科技股份有限公司 | Flue gas type slag steam of quenching disappears white device |
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| Publication number | Publication date |
|---|---|
| CN104894310B (en) | 2017-04-19 |
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