CN104033872A - Method and system for recycling waste heat of continuous casting machine - Google Patents
Method and system for recycling waste heat of continuous casting machine Download PDFInfo
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- CN104033872A CN104033872A CN201410260333.8A CN201410260333A CN104033872A CN 104033872 A CN104033872 A CN 104033872A CN 201410260333 A CN201410260333 A CN 201410260333A CN 104033872 A CN104033872 A CN 104033872A
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Abstract
The invention discloses a method for recycling waste heat of a continuous casting machine. By the aid of the method, problems of high running pressures, severe damage to equipment, low quality of obtained steam and incapability of effectively converting and utilizing the obtained steam due to a direct soft water heating mode in the prior art can be solved. The method includes capturing and absorbing heat in a field with the continuous casting machine by the aid of non-water heat-conducting media at first; enabling heat to be exchanged among water and the high-temperature non-water heat-conducting media to finally obtain high-temperature and high-pressure steam capable of being converted and utilized. The invention further provides a system for recycling the waste heat of the continuous casting machine. The system comprises a heat collection device, a boiler heat exchange device, a water and heat storage device and an application system. The boiler heat exchange device comprises a heat exchange chamber and a steam chamber, and a first heat exchanger is arranged in the heat exchange chamber; the heat collection device is connected with the first heat exchanger, and the steam chamber is connected with the water and heat storage device and the application system respectively. The method and the system have the advantages that soft water manufacturing devices can be omitted, the non-water heat-conducting media run under low pressures, accordingly, air resistance can be prevented, the obtained steam is stable and is high in quality, and power generation requirements can be met.
Description
Technical field
The present invention relates to metallurgy industry technical field, refer to especially a kind of conticaster exhaust heat recovering method and recovery system.
Background technology
Today of energy scarcity, energy-conservation, consumption reduction, reduce discharging be the steel industry problem demanding prompt solution that each enterprise, especially energy consumption are large, cost is high.At present, most of iron and steel enterprise is in the time producing steel billet, and a series of equipment in continuous casting steel machine are that conticaster is exposed to workshop mostly, the cooling such as the traditional approach that leans on radiation, conducts heat or fetch water, and do not take any covering or waste heat recovery measure.Conticaster is as an energy releaser, and in the time of smelting molten steel, its temperature reaches as high as 1500～1600 DEG C, and it is even lower that appearance temperature is generally 700～800 DEG C of left and right, and the waste of the consequent energy is very outstanding.In addition, the strong heat radiation of steel billet makes the environment temperature in workshop high especially, causes workshop shop floor worker condition of work to worsen.If continuous casting steel billet heats that discharge from High-temperature cooling to room temperature effectively can be collected more, recycle in production, such as with the first heating water of these heats, obtain water vapour, recycling water vapour pushing turbine or screw machine, and then drive generator generating, the waste heat of conticaster is converted into electric energy, build recycling economy, can greatly cut the waste, improve heat recovery rate.
Patent 1 (application number 201210405642.0) has proposed a kind of conticaster steel blank residual heat reclamation device, for conticaster various piece, modularized design goes out multiple heating surfaces for recovering energy, then the running water after softening is flowed into after preheater waste heat, aqueous water is pressurizeed and is entered each heating surface absorption billet residual heat by forced circulation pump, and then changes into the water vapour of certain pressure.Both can recovery waste heat, can improve again shopwork environment.But described technology adopts soft water directly to heat and have following problem: (1) operating pressure is high, easily leaks; (2) go out easy formation vapour lock at bend pipe pipeline when water vapor, cause hot-spot to damage; (3) need soft water preparation device, have soft water loss; (4) steam producing is low-quality water vapour, is difficult to be converted into the available energy.
Summary of the invention
The present invention proposes a kind of conticaster exhaust heat recovering method and recovery system, for solving the problems referred to above of background technology.
Technical scheme of the present invention is achieved in that
A kind of conticaster exhaust heat recovering method, first uses non-water heat-conducting medium that the heat at conticaster scene is flutterred and caught absorption, then water and the non-water heat-conducting medium of high temperature is carried out to heat exchange, finally obtain can trans-utilization high-temperature high-pressure steam.
Preferably, non-water heat-conducting medium comprises conduction oil and fused salt.
Preferably, conduction oil comprises that alkylbenzene type conduction oil, Fluhyzon type conduction oil, alkyl biphenyl type conduction oil or biphenyl and Biphenyl Ether support the one in eutectic mixture conduction oil; Fused salt is the ternary eutectic mixture of potassium nitrate, natrium nitrosum and sodium nitrate.
The invention allows for a kind of conticaster residual neat recovering system, comprise following functional device: heat harvester, boiler heat-exchanging device, retaining regenerative apparatus, application system, boiler heat-exchanging device comprises Heat Room and vaporium, is provided with First Heat Exchanger in Heat Room; Heat harvester is connected with First Heat Exchanger, and vaporium is connected with retaining regenerative apparatus, application system respectively.
Preferably, application system comprises electricity generation system and recovery system.
Preferably, also comprise atmospheric water tank, atmospheric water tank is connected with retaining regenerative apparatus.
Preferably, be also provided with the second heat exchanger in retaining regenerative apparatus, second heat exchanger one end is connected with electricity generation system, and the other end is connected with atmospheric water tank.
Preferably, on vaporium, be provided with Safety relief valve, steam exit pressure control valve and water-level gauge.
Preferably, in vaporium, be provided with steam trap.
Preferably, First Heat Exchanger and the second heat exchanger are coiled or the helix tube type heat exchanger of red copper material.
Compared with prior art, the present invention has following beneficial effect:
1, adopt high boiling non-water heat-conducting medium, low pressure operation does not produce leakage, does not produce vapour lock, avoids dielectric leakage to produce potential safety hazard, has avoided hot-spot to burn out pipeline yet;
2, the steam producing is stablized, quality is high, can meet generating needs;
3,, without soft water preparation device, save cost of investment and long service life;
4, system is reasonable, compact, takes up an area less, cost is low.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of conticaster residual neat recovering system of the present invention.
In figure:
1, heat harvester; 2, boiler heat-exchanging device; 21, Heat Room; 211, First Heat Exchanger; 22, vaporium; 3, retaining regenerative apparatus; 31, the second heat exchanger; 4, atmospheric water tank; 5, electricity generation system; 6, recovery system.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The present invention proposes a kind of conticaster exhaust heat recovering method, first use non-water heat-conducting medium that the heat at conticaster scene is flutterred and caught absorption, then water and the non-water heat-conducting medium of high temperature are carried out to heat exchange, finally obtain can trans-utilization high-temperature high-pressure steam.
As the preferred technical scheme of one, an embodiment more of the present invention, non-water heat-conducting medium comprises conduction oil and fused salt.
As the preferred technical scheme of one, another embodiment of the present invention, conduction oil comprises that alkylbenzene type conduction oil, Fluhyzon type conduction oil, alkyl biphenyl type conduction oil or biphenyl and Biphenyl Ether support the one in eutectic mixture conduction oil; Fused salt is the ternary eutectic mixture of potassium nitrate, natrium nitrosum and sodium nitrate.
Conduction oil, claim again heat medium oil, there is the performance of heat resistanceheat resistant cracking and chemical oxidation, heat transfer efficiency is high, rapid heat dissipation and heat endurance fine, under the condition of normal pressure almost, can obtain very high operating temperature, can greatly reduce operating pressure and the safety requirements of high-temperature systems, improve the reliability of system and equipment.Use in the art, can also omit the water treatment system that traditional water heating needs, improved system heat transfer efficiency, reduced the maintenance work of equipment and pipeline.Conduction oil and fused salt are worked under low pressure condition, and processing safety will be higher than water and steam system.
The invention allows for a kind of conticaster residual neat recovering system, comprise following functional device: heat harvester 1, boiler heat-exchanging device 2, retaining regenerative apparatus 3, application system, boiler heat-exchanging device 2 comprises Heat Room 21 and vaporium 22, is provided with First Heat Exchanger 211 in Heat Room 21; Heat harvester 1 is connected with First Heat Exchanger 211, and vaporium 22 is connected with retaining regenerative apparatus 3, application system respectively.
Operation principle is: heat harvester 1 catches for flutterring the heat that absorbs conticaster scene, enters in First Heat Exchanger 211 afterwards after the heat of non-water heat-conducting medium absorption heat harvester 1; Retaining regenerative apparatus 3 (being provided with inlet channel on retaining regenerative apparatus 3) can provide water in Heat Room 21, transform through First Heat Exchanger 211, water absorbs the heat of high temperature non-water heat-conducting medium and is converted to steam and enters vaporium 22, then enters and in application system, is converted utilization.
Heat harvester 1 can design according to the concrete parts of conticaster, comprises the heat acquisition component of multiple dispersions, these heat acquisition component all adopt the good material of heat conduction as heat-absorbent surface, be incubated good material as the back of the body hot side.Such as: withdrawal straightening machine front, in view of behind two cold houses to Non-water-cooled, unshielded before withdrawal straightening machine, steel billet just goes out two cold house's temperature very high (1100～1200 DEG C of left and right), and belongs to dummy ingot on segmental arc, therefore adopts packaging type or semi-packing type or barrel-shaped heat acquisition component; Withdrawal straightening machine part, existing withdrawal straightening machine adopts the both sides water-cooled setting of lower aperture mostly, and the form that upside adds thermal insulation board prevents that it from being baked badly, and therefore this part heat acquisition component is conduction oil absorber plate, not only can protect equipment but also can effectively absorb heat; Withdrawal straightening machine rear portion is sheared anterior, it after the complete steel billet base of this regional processing head, is a level and smooth high-temperature region that is close to constant temperature, temperature reaches 1000～1100 DEG C, owing to processing the needs of base head, base tail, can not be designed to fixed acquisition component, therefore adopt table roller gap to adopt absorber plate form, absorb the heat of high temperature of steel billet both sides, the dull and stereotyped heat sink of lift entirety conduction oil is made at top; Cut rear roller-way, this part steel billet will pass through fast, in order effectively to gather heat, the active tunnel formula collection cover of FX can be set according to steel billet length; Cold bed part, steel billet focuses mostly in this region, and therefore heat is concentrated, bottom plate formula acquisition component in employing.
Non-water heat-conducting medium enters heat harvester 1 by pipeline, and pipeline and the form that all adopts high-temperature valve (not marking) with snap joint (not marking) being connected of heat harvester 1, to facilitate the on-the-spot problem of processing; Except heat harvester 1, other pipelines all adopt steel pipe, and steel pipe is outside equipped with heat-insulation layer.
As the preferred technical scheme of one, an embodiment more of the present invention, application system comprises electricity generation system 5 and recovery system 6.
As the preferred technical scheme of one, an embodiment more of the present invention, also comprises atmospheric water tank 4, and atmospheric water tank 4 is connected with retaining regenerative apparatus 3.
As the preferred technical scheme of one, another embodiment of the present invention, is also provided with second heat exchanger 31, the second heat exchanger 31 one end and is connected with electricity generation system 5 in retaining regenerative apparatus 3, and the other end is connected with atmospheric water tank 4.
In order to ensure generating efficiency, the present invention is also provided with atmospheric water tank 4, and atmospheric water tank 4 is connected with retaining regenerative apparatus 3; In order further to reclaim heat, the water after generating has also carried out heat recovery by the second heat exchanger 31.Gas-vapor mix after generating is through the second heat exchanger 31 in retaining regenerative apparatus 3, heat is transferred to the water in retaining regenerative apparatus 3, current return atmospheric water tank 4, use water pump (not marking) to be pressed into retaining regenerative apparatus 3 after arriving certain water level again; Or the high-temperature high-pressure steam obtaining is separately used as him by the grid-connected recovery system 6 that enters.
As the preferred technical scheme of one, another embodiment of the present invention, is provided with Safety relief valve (not marking), steam exit pressure control valve (not marking) and water-level gauge (not marking) on vaporium 22.
As the preferred technical scheme of one, an embodiment more of the present invention, is provided with steam trap (not marking) in vaporium 22.
In order to ensure the quality of water vapour, in vaporium 22, be provided with the steam trap that carries out steam separation, the high-temperature high-pressure steam after separation enters in electricity generation system 5 and generates electricity through pipeline again.Electricity generation system 5 comprises steam turbine (or screw machine, all do not mark) and generator (not marking).
As the preferred technical scheme of one, another embodiment of the present invention, First Heat Exchanger 211 and the second heat exchanger 31 are coiled or the helix tube type heat exchanger of red copper material, and material or the shape of heat exchanger can be also other materials or shape certainly, as long as have good heat exchange efficiency.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a conticaster exhaust heat recovering method, is characterized in that: first use non-water heat-conducting medium that the heat at conticaster scene is flutterred and caught absorption, then water and the non-water heat-conducting medium of high temperature carried out to heat exchange, finally obtain can trans-utilization high-temperature high-pressure steam.
2. conticaster exhaust heat recovering method according to claim 1, is characterized in that: described non-water heat-conducting medium comprises conduction oil and fused salt.
3. conticaster exhaust heat recovering method according to claim 2, is characterized in that: described conduction oil comprises that alkylbenzene type conduction oil, Fluhyzon type conduction oil, alkyl biphenyl type conduction oil or biphenyl and Biphenyl Ether support the one in eutectic mixture conduction oil; Described fused salt is the ternary eutectic mixture of potassium nitrate, natrium nitrosum and sodium nitrate.
4. the conticaster exhaust heat recovering method described in right to use requirement 1-3 any one reclaims a system for conticaster waste heat, it is characterized in that:
Comprise following functional device: heat harvester (1), boiler heat-exchanging device (2), retaining regenerative apparatus (3) and application system, described boiler heat-exchanging device (2) comprises Heat Room (21) and vaporium (22), is provided with First Heat Exchanger (211) in described Heat Room (21);
Described heat harvester (1) is connected by water circulating pump station system with described First Heat Exchanger (211), and described vaporium (22) is connected with described retaining regenerative apparatus (3), described application system respectively.
5. conticaster residual neat recovering system according to claim 4, is characterized in that: described application system comprises electricity generation system (5) and recovery system (6).
6. conticaster residual neat recovering system according to claim 5, is characterized in that: also comprise atmospheric water tank (4), described atmospheric water tank (4) is connected with described retaining regenerative apparatus (3).
7. conticaster residual neat recovering system according to claim 6, it is characterized in that: in described retaining regenerative apparatus (3), be also provided with the second heat exchanger (31), described the second heat exchanger (31) one end is connected with described electricity generation system (5), and the other end is connected with described atmospheric water tank (4).
8. conticaster residual neat recovering system according to claim 4, is characterized in that: described vaporium is provided with Safety relief valve, steam exit pressure control valve and water-level gauge on (22).
9. conticaster residual neat recovering system according to claim 4, is characterized in that: described vaporium is provided with steam trap in (22).
10. conticaster residual neat recovering system according to claim 7, is characterized in that: described First Heat Exchanger (211) and described the second heat exchanger (31) are coiled or the helix tube type heat exchanger of red copper material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410260333.8A CN104033872B (en) | 2014-06-12 | Conticaster exhaust heat recovering method and recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410260333.8A CN104033872B (en) | 2014-06-12 | Conticaster exhaust heat recovering method and recovery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104033872A true CN104033872A (en) | 2014-09-10 |
| CN104033872B CN104033872B (en) | 2016-11-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104324955A (en) * | 2014-10-24 | 2015-02-04 | 陕西钢铁集团有限公司 | Cold bed afterheat recovery collection and utilization device |
| CN109995272A (en) * | 2019-03-15 | 2019-07-09 | 宁波中科远东催化工程技术有限公司 | A kind of chemical industry evaporator using waste heat thermo-electric generation |
| CN116241854A (en) * | 2023-03-08 | 2023-06-09 | 江苏省镔鑫钢铁集团有限公司 | Continuous casting and direct rolling heat preservation screw power generation system and method |
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| CN101260816A (en) * | 2008-04-18 | 2008-09-10 | 朱学仪 | Method and device for reclaiming and utilizing billet residual heat |
| US20120118526A1 (en) * | 2009-03-02 | 2012-05-17 | Peter Sudau | Energy recovery in hot strip mills by converting the cooling heat of the continuous casting plant and the residual heat of slabs and coils into electrical enery or otherwise utilizing the captured process heat |
| 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 |
| CN102914173A (en) * | 2012-11-16 | 2013-02-06 | 宁夏光合能源科技有限公司 | Method and device for recovering and storing ferroalloy furnace molten iron waste heat to generate electricity |
Patent Citations (6)
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|---|---|---|---|---|
| CN2650052Y (en) * | 2003-08-13 | 2004-10-20 | 韩文琦 | Apparatus for recovering high temperature radiation waste heat with intermittent discharge |
| CN2779071Y (en) * | 2005-04-06 | 2006-05-10 | 王文君 | Roller way kiln residual heat electricity generating device |
| CN101260816A (en) * | 2008-04-18 | 2008-09-10 | 朱学仪 | Method and device for reclaiming and utilizing billet residual heat |
| US20120118526A1 (en) * | 2009-03-02 | 2012-05-17 | Peter Sudau | Energy recovery in hot strip mills by converting the cooling heat of the continuous casting plant and the residual heat of slabs and coils into electrical enery or otherwise utilizing the captured process heat |
| 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 |
| CN102914173A (en) * | 2012-11-16 | 2013-02-06 | 宁夏光合能源科技有限公司 | Method and device for recovering and storing ferroalloy furnace molten iron waste heat to generate electricity |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104324955A (en) * | 2014-10-24 | 2015-02-04 | 陕西钢铁集团有限公司 | Cold bed afterheat recovery collection and utilization device |
| CN104324955B (en) * | 2014-10-24 | 2016-08-31 | 陕西钢铁集团有限公司 | A kind of cold bed waste heat recovery collection and utilization device |
| CN109995272A (en) * | 2019-03-15 | 2019-07-09 | 宁波中科远东催化工程技术有限公司 | A kind of chemical industry evaporator using waste heat thermo-electric generation |
| CN116241854A (en) * | 2023-03-08 | 2023-06-09 | 江苏省镔鑫钢铁集团有限公司 | Continuous casting and direct rolling heat preservation screw power generation system and method |
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