CN104894310B - 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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- CN104894310B CN104894310B CN201510159225.6A CN201510159225A CN104894310B CN 104894310 B CN104894310 B CN 104894310B CN 201510159225 A CN201510159225 A CN 201510159225A CN 104894310 B CN104894310 B CN 104894310B
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- steam
- flue gas
- slag
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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, more particularly to a kind of blast furnace slag flushing waste heat recovery steaming
Vapour-flue gas heat exchange technique.Reclaim suitable for the blast furnace slag flushing system waste heat of any rank.
Background technology
In blast furnace ironmaking smelting process, the slag temperature of generation is about 1500 DEG C, and this slag is in the Punched box by rushing
The high-velocity flow that pulp water pump is provided rapidly is granulated and is quickly cooled to grain slag.A large amount of 100 DEG C of steaming can be produced during this
Vapour and temperature are in 80-95 DEG C of low-temperature water heating.In current grain slag production technology, steam is all directly to diffuse, and is wasted a large amount of
Heat.And washing slag water is then that cooling tower is entered after precipitation is filtered in order to ensure the safe operation of system, typically, after cooling again
Secondary circulation flushing cinder.A part of heat is lost in cooling tower again, both wasted the energy, polluted environment again.Blast furnace
Melting slag waste heat recovery technology is increasingly subject to the attention of countries in the world, and its main direction of studying is dry Slag treatment method, but due to which
The dry slag temperature for producing is high, and equipment repair and maintenance are difficult, and the waste residue of generation nowhere stores, is not unanimously promoted and applies.
And for the Low Temperature Steam that flush slag is produced is reclaimed as its temperature is relatively low, heat energy utilization is difficult, also never new progress.
The content of the invention
It is an object of the invention to provide a kind of blast furnace slag flushing heat recovery steam-flue gas heat exchange technique, solves low temperature
Low-pressure steam is not easy to the problem for reclaiming.
A kind of blast furnace slag flushing heat recovery steam-flue gas heat exchange technique, comprises the following steps that：
When the 1st, working, electric gate valve 1 is closed, and prevents the discharge of steam in grain slag chimney, the first electric gate valve 2 from opening,
Allow water granulated slag steam to enter, the second electric gate valve 6 is opened, allow air stove high-temperature flue gas to enter；
2nd, the steam produced during flush slag is by jet chimney, Jing after steam purifier 3 is by steam purification, will steam
S and S compounds in vapour are removed, and remove objectionable impurities；
3rd, the steam and the high-temperature flue gas of air stove that flush slag is produced enters steam-flue gas heat-exchange unit 5 jointly, and grain slag steams
Vapour is by the heat absorption of flue gas, the flue gas Jing air stove smoke stack emissions for having exchanged heat；
4th, water granulated slag steam temperature eventually enters into steam jet heat pump 4 after improving, the mixing with pipe network high temperature and high pressure steam,
Form utilizable steam.
5th, under idle state, electric gate valve 1 is opened, and washing slag water is directly discharged from grain slag chimney, and first is electronic
Gate valve 2, the second electric gate valve 6 are closed.
It is an advantage of the current invention that：
1st, steam purifier is designed, S the and S compounds in steam is removed, the corrosion to system is prevented.
2nd, the higher steam of temperature can be obtained by steam flue gas heat-exchange unit.
3rd, the steam with certain pressure can be obtained by steam jet heat pump.
4th, the production cost of steel plant is reduced, energy-saving effect is played.
Description of the drawings
Fig. 1 is steam-smoke heat exchanging system process chart.Wherein, electric gate valve 1, the first electric gate valve 2, steam
Purifier 3, steam jet heat pump 4, steam flue gas heat-exchange unit 5, the second electric gate valve 6.
Specific embodiment
Embodiment 1
A kind of blast furnace slag flushing heat recovery steam-flue gas heat exchange technique, comprises the following steps that：
When the 1st, working, electric gate valve 1 is closed, and prevents the discharge of steam in grain slag chimney, the first electric gate valve 2 from opening,
Allow water granulated slag steam to enter, the second electric gate valve 6 is opened, allow air stove high-temperature flue gas to enter；
2nd, the steam produced during flush slag is by jet chimney, Jing after steam purifier 3 is by steam purification, will steam
S and S compounds in vapour are removed, and remove objectionable impurities；
3rd, the steam and the high-temperature flue gas of air stove that flush slag is produced enters steam-flue gas heat-exchange unit 5 jointly, and grain slag steams
Vapour is by the heat absorption of flue gas, the flue gas Jing air stove smoke stack emissions for having exchanged heat；
4th, temperature eventually enters into steam jet heat pump 4 after improving, the mixing with pipe network high temperature and high pressure steam, and formation can be with
The steam for utilizing.
Claims (1)
1. a kind of blast furnace slag flushing heat recovery steam-flue gas heat exchange technique, it is characterised in that comprise the following steps that：
1) when working, electric gate valve (1) is closed, and prevents the discharge of steam in grain slag chimney, the first electric gate valve (2) from opening,
Allow water granulated slag steam to enter, the second electric gate valve (6) is opened, allow air stove high-temperature flue gas to enter；
2) steam for producing during flush slag passes through jet chimney, Jing after steam purifier (3) is by steam purification, by steam
In S and S compounds remove, remove objectionable impurities；
3) steam and the high-temperature flue gas of air stove that flush slag is produced enters steam-flue gas heat-exchange unit (5), water granulated slag steam jointly
By the heat absorption of flue gas, the flue gas Jing air stove smoke stack emissions for having exchanged heat；
4) water granulated slag steam temperature eventually enters into steam jet heat pump (4), the mixing with pipe network high temperature and high pressure steam, shape after improving
Into 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 brake
Valve (2), the second electric gate valve (6) are 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 |
Publications (2)
| Publication Number | Publication Date |
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| CN104894310A CN104894310A (en) | 2015-09-09 |
| CN104894310B true 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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Families Citing this family (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 | Slag flushing water vapor recovery and white mist elimination system and recovery method |
| 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 |
|---|
| 高炉冲渣余热回收的试验研究与利用分析;王铁民;《冶金动力》;20130731(第7期);第43-46页 * |
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