CN202779668U - Waste heat recovery device of continuous casting secondary cooling section - Google Patents
Waste heat recovery device of continuous casting secondary cooling section Download PDFInfo
- Publication number
- CN202779668U CN202779668U CN2012204301199U CN201220430119U CN202779668U CN 202779668 U CN202779668 U CN 202779668U CN 2012204301199 U CN2012204301199 U CN 2012204301199U CN 201220430119 U CN201220430119 U CN 201220430119U CN 202779668 U CN202779668 U CN 202779668U
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- heat recovery
- continuous casting
- waste heat
- recovery device
- steam
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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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- 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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model discloses a waste heat recovery device of a continuous casting secondary cooling section. The waste heat recovery device of the continuous casting secondary cooling section comprises a waste heat recovery system and a steam production system, wherein the waste heat recovery system comprises a medium-temperature salt bath pond (3) and a medium-temperature molten salt furnace (5), wherein the interior of the medium-temperature salt bath pond (3) is provided with a roller (2); the medium-temperature molten salt furnace (5) is mutually connected with the medium-temperature salt bath pond; and fused salt is used as a heat transferring medium by the waste heat recovery system. The steam production system comprises a water tank (9), a feed pump (10), a deaerator (11), a heat exchanger (6), a steam pocket (12) and a steam accumulator (13), wherein the water tank (9), the feed pump (10), the deaerator (11), the heat exchanger (6), the steam pocket (12) and the steam accumulator (13) are mutually connected in sequence. Moreover, the heat exchanger is also respectively and mutually connected with the medium-temperature salt bath pond and the medium-temperature molten salt furnace in the waste heat recovery system. After such a system is adopted, the waste heat recovery device of the continuous casting secondary cooling section can be obtained. The waste heat recovery device of the continuous casting secondary cooling section is capable of converting the heat energy of a billet into steam heat energy and is higher in heat energy recovery rate.
Description
Technical field
The utility model relates to the device field that utilizes waste heat, relates in particular to a kind of device that utilizes the waste heat production steam of continuous casting two cold section.
Background technology
In continuous casting process, for strand being solidified faster and smooth throwing, after crystallizer, be provided with secondary cooling system.The secondary cooling mainly is that cooling water is directly injected on the surface of strand, make the rapid cooled and solidified of strand, its intensity of cooling, nozzle arrangements form and configuration all are directly connected to the Quality and yield of strand, and therefore the alternative light water cooling system of air water cooling system has become inevitable in modern strand production.In continuous casting two cold section operation, liquid molten steel forms duricrust through preliminary cooling in appearance, and temperature drops to about 1300 ℃, and then further cooling is until slab solidifies water spray fully, and this moment, temperature was about 900 ℃.Temperature by 1300 ℃ to 900 ℃ process in, the cooling of steel billet discharges a large amount of heats.If this heat for the production of steam or generating, can be saved mass energy, economic benefit is very considerable.And only the heat of low-temperature zone is recycled at present, still belong to blank for the recovery and utilization technology of this high temperature section waste heat.In addition, heat exchange mode mainly adopts traditional radiation heat transfer or gas-solid heat exchange, and the grade of recovery waste heat is lower, and the coefficient of heat transfer is all high not as the liquid-solid coefficient of heat transfer.
Summary of the invention
The technical problems to be solved in the utility model is for overcoming the shortcomings such as existing heat recovery device is low at the high temperature section utilization rate of waste heat, heat transfer effect is not good, and existing heat recovery device is improved design, obtain a kind ofly steel billet heat energy to be converted into steam thermal energy, the heat recovery device of the continuous casting two cold section that high temperature section heat energy recycle rate is high.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of heat recovery device of continuous casting two cold section is provided, and it comprises residual neat recovering system and production of steam system.Residual neat recovering system comprises that inside is provided with the middle thermohaline bathing pool of Kun axle and the middle temperature molten salt stove that links to each other with thermohaline bathing pool in this, and it is heat transferring medium that this residual neat recovering system adopts fuse salt.The production of steam system comprises water tank, feed pump, oxygen-eliminating device, heat exchanger, drum and the steam accumulator that links to each other successively, and heat exchanger also links to each other with middle temperature molten salt stove with the middle thermohaline bathing pool of residual neat recovering system respectively.
The first preferred version of the present utility model is that fuse salt adopts zinc chloride.
The second preferred version of the present utility model is that the temperature of the outlet of control heat exchanger is higher than the fusing point of fuse salt.
The 3rd preferred version of the present utility model is, middle thermohaline bathing pool is connected with collecting tank, and this collecting tank is connected with middle temperature molten salt stove.
Technical advantage of the present utility model is: what the slab of fuse salt and secondary cooling zone carried out is liquid-solid forced heat-exchanging, and its heat exchange efficiency is higher than traditional radiation heat transfer and gas-solid heat exchange.Because the exchange capability of heat of fuse salt surpasses the heat dissipation capacity of slab, can guarantee that slab fully cools off, the high temperature section waste heat heat energy of secondary cooling zone enough effectively reclaims.Wherein, preferentially select zinc chloride that the temperature of fusing point and boiling point differs greatly as fuse salt, its wider temperature scope of application not only can satisfy the needs of high temperature heat absorption and middle temperature heat release, and can keep liquid in the waste heat recovery process, and this facilitates the cycling and reutilization of zinc chloride.In addition, zinc chloride is cheap, stable in properties, and its security is better than other allied substances, thereby has reduced the heat exchange cost, helps of the present utility model applying.Because a large amount of waste heats of the high temperature section that reclaims continue on for the production of steam system, obtain high-grade saturated vapor again, take full advantage of the discarded energy, improved economic benefit.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the structural representation of the heat recovery device embodiment of the utility model continuous casting two cold section.
The specific embodiment
By the structural representation of the heat recovery device embodiment of continuous casting two cold section shown in Figure 1 as can be known, it comprises residual neat recovering system and production of steam system, residual neat recovering system comprises that inside is provided with the middle thermohaline bathing pool 3 of Kun axle 2 and the middle temperature molten salt stove 5 that links to each other with thermohaline bathing pool 3 in this, and it is heat transferring medium that this residual neat recovering system adopts fuse salt.And the production of steam system comprises water tank 9, feed pump 10, oxygen-eliminating device 11, heat exchanger 6, drum 12 and the steam accumulator 13 that links to each other successively, and heat exchanger 6 also links to each other with middle temperature molten salt stove 5 with the middle thermohaline bathing pool 3 of residual neat recovering system respectively.In addition, middle thermohaline bathing pool 3 is connected with collecting tank 8, and this collecting tank 8 is connected with middle temperature molten salt stove 5.
During opening device, at first, by middle temperature molten salt stove 5 fuse salt is melted, this fuse salt can be selected zinc chloride.After zinc chloride melted, valve 142 was opened, and valve 143 is closed, and liquid zinc chloride can be injected in the middle thermohaline bathing pool 3.Then, start continuous casting process, zinc chloride is just to reclaiming by the waste heat of Kun axle 2 by the strand 1 of middle thermohaline bathing pool 3 inside.When the temperature in the central thermohaline bathing pool 3 reaches 630 ℃ of left and right sides, the feed pump 10 of temperature molten salt pump 4, heat exchanger 6 and production of steam system, oxygen-eliminating device 11, heat exchanger 6, drum 12 and steam accumulator 13 in the startup.When middle temperature molten salt pump 4 is introduced heat exchanger 6 with the liquid zinc chloride in the middle thermohaline bathing pool 3, Open valve 145.Feed pump 10 is also introduced the water in the water tank 9 among the heat exchanger 6, and water and liquid zinc chloride carry out sufficient heat exchange and become the high-grade saturated vapor.At last, Open valve 141, through the zinc chloride thermohaline bathing pool 3 from heat exchanger 6 is back to after the heat exchange, the steam drum 12 of then flowing through is stored in the steam accumulator 13.
When continuous casting process stopped to produce, valve 141 and valve 142 were closed, and valve 143 is opened.The temperature of outlet of control heat exchanger 6 is higher than the fusing point of zinc chloride, makes zinc chloride keep liquid state in the waste heat recovery process, thereby has guaranteed that zinc chloride can from heat exchanger 6 is back in the temperature molten salt stove 5, be convenient to cycling and reutilization.In addition, leak for the zinc chloride liquation that causes in the slab course of conveying, collect with collecting tank 8, then Open valve 144 returns the leakage fluid foldback to middle temperature molten salt stove 5 continuation utilizations with returning liquid pump 7, has saved the cost of waste heat recovery.
The utility model is not limited to the above-described embodiment and examples, in the ken that the art personnel possess, can also make a variety of changes without departing from the inventive concept of the premise.
Claims (4)
1. the heat recovery device of a continuous casting two cold section, it is characterized in that: comprise residual neat recovering system and production of steam system, described residual neat recovering system comprises that inside is provided with the middle thermohaline bathing pool (3) of Kun axle (2) and the middle temperature molten salt stove (5) that links to each other with thermohaline bathing pool (3) in this, and it is heat transferring medium that this residual neat recovering system adopts fuse salt; Described production of steam system comprises water tank (9), feed pump (10), oxygen-eliminating device (11), heat exchanger (6), drum (12) and the steam accumulator (13) that links to each other successively, and this heat exchanger (6) also links to each other with middle temperature molten salt stove (5) with the middle thermohaline bathing pool (3) of described residual neat recovering system respectively.
2. according to the heat recovery device of the described continuous casting two cold section of claim 1, it is characterized in that: described fuse salt adopts zinc chloride.
3. according to the heat recovery device of claim 1 or 2 described continuous casting two cold sections, it is characterized in that: the temperature of the outlet of described heat exchanger (6) is higher than the fusing point of described fuse salt.
4. according to the heat recovery device of the described continuous casting two cold section of claim 1, it is characterized in that: described middle thermohaline bathing pool (3) is connected with collecting tank (8), and this collecting tank (8) is connected with described middle temperature molten salt stove (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204301199U CN202779668U (en) | 2012-08-28 | 2012-08-28 | Waste heat recovery device of continuous casting secondary cooling section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204301199U CN202779668U (en) | 2012-08-28 | 2012-08-28 | Waste heat recovery device of continuous casting secondary cooling section |
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| Publication Number | Publication Date |
|---|---|
| CN202779668U true CN202779668U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012204301199U Withdrawn - After Issue CN202779668U (en) | 2012-08-28 | 2012-08-28 | Waste heat recovery device of continuous casting secondary cooling section |
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| CN (1) | CN202779668U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773441A (en) * | 2012-08-28 | 2012-11-14 | 无锡市东方环境工程设计研究所有限公司 | Afterheat recycling device for continuous cast secondary cooling section |
| CN106247811A (en) * | 2016-08-09 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of waste heat of flue gas of heating furnace recovery system |
| CN107617727A (en) * | 2017-08-23 | 2018-01-23 | 南通迪瓦特节能风机有限公司 | Steel billet cold bed heat reclaim unit and its system |
-
2012
- 2012-08-28 CN CN2012204301199U patent/CN202779668U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773441A (en) * | 2012-08-28 | 2012-11-14 | 无锡市东方环境工程设计研究所有限公司 | Afterheat recycling device for continuous cast secondary cooling section |
| CN102773441B (en) * | 2012-08-28 | 2015-10-07 | 无锡市东方环境工程设计研究所有限公司 | The waste heat recovery device of continuous casting two cold section |
| CN106247811A (en) * | 2016-08-09 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of waste heat of flue gas of heating furnace recovery system |
| CN107617727A (en) * | 2017-08-23 | 2018-01-23 | 南通迪瓦特节能风机有限公司 | Steel billet cold bed heat reclaim unit and its system |
| CN107617727B (en) * | 2017-08-23 | 2019-08-23 | 南通迪瓦特节能风机有限公司 | Steel billet cold bed heat reclaim unit and its system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20151007 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |