CN103063041B - ISP (imperial smelting process) cooling chute waste heat boiler system - Google Patents
ISP (imperial smelting process) cooling chute waste heat boiler system Download PDFInfo
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- CN103063041B CN103063041B CN201310005614.4A CN201310005614A CN103063041B CN 103063041 B CN103063041 B CN 103063041B CN 201310005614 A CN201310005614 A CN 201310005614A CN 103063041 B CN103063041 B CN 103063041B
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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 invention discloses an ISP (imperial smelting process) cooling chute waste heat boiler system comprising a steam manifold and a plurality of parallelly arranged chute heat exchangers. Each chute heat exchanger comprises a lead and zinc chute, a comb-shaped heat exchange box and a heat exchange tube, lead and zinc meltwater is filled in the lead and zinc chute, the lower portion of the comb-shaped heat exchange box is immerged into the lead and zinc meltwater, low-melting-point alloy meltwater is filled in the comb-shaped heat exchange box, and the heat exchange tube is immerged into the low-melting-point alloy meltwater. Further, the steam manifold is communicated with a water inlet of the heat exchange tube through a descending tube to supply water to the heat exchange tube, and a steam outlet of the heat exchange tube is communicated with the steam manifold through an ascending tube to discharge steam to the steam manifold. By the ISP cooling chute waste heat boiler system, waste heat of the lead and zinc meltwater from 550 DEG C to 450 DEG C during cooling is effectively recovered, corrosion to the heat exchangers from the lead and zinc meltwater can be avoided by corrosion-resistant insulation layers which are adopted in the chute waste heat exchangers, waste heat is recovered by saturated steam, modification of an original technical process body is omitted, and engineering application is easy to realize. Energy saving level of melting of a closed blast furnace can be improved and technical energy consumption is reduced.
Description
Technical field
The present invention relates to the power-saving technology in lead-zinc smelting technical process, especially Pb-Zn separation cooling chute afterheat boiler system in closed blast furnace zinc process (ISP method).
Background technology
Closed blast furnace zinc process is also called ISP method, and it incorporates plumbous and zinc two kinds of pyrometallurgical smelting flow processs, is current topmost pyrometallurgy of zinc method in the world.Lead and zinc concentrate and flux are baked with agglomeration after preparing burden on sintering machine, agglomerate adds blast furnace together with the coke through preheating, agglomerate is heated directly to after ZnO starts the temperature of reducing in stove, and ZnO is reduced and obtains zinc fume, and zinc fume and tuyere area burn the CO produced
2lead-splash condenser is entered from furnace roof together with CO gas, zinc fume by lead splash condensing to plumbous liquid phase with temperature, and the plumbous liquid of cooling medium is also heated to about 500 ~ 530 DEG C by furnace gas, form plumbous zinc fused solution, cooling chute is squeezed into pump, plumbous zinc fused solution is cooled is water-cooled to 440 DEG C ~ 450 DEG C, then enters in separating tank and complete Lead separation from zinc.
In ISP technique, Pb-Zn separation cooling chute absorbed from the waste heat that 530 DEG C the drop to 440 DEG C water that is cooled and entered air by cooling tower in the past, not only wasted valuable residual heat resources, and consumed a lot of recirculated cooling water for heat radiation, waste water resource.
Mitsui metal engineering company releases and utilizes ISP to cool chute and cogeneration technology, and the chute boiler designing a kind of particular design reclaims these waste heats with superheated steam form (1.6MPa, 420 DEG C), and supporting power generating equipment.This chute boiler is made up of protective sleeve, outside low-melting alloy, interior case, inner side low-melting alloy, heat-transfer pipe; heat-transfer pipe makes evaporimeter, the superheater of flap-like; boiler immerses in the fusion of lead zinc solution of cooling chute; carry out heat exchange; hot water becomes superheated steam, delivers to steam turbine and becomes electric energy.This chute boiler does not have extensive use and Qian Xin enterprise, reason have following some: (1) chute boiler is made up of superheater and evaporimeter, system complex.Superheater is steam heat-exchanging, and the coefficient of heat transfer differs several order of magnitude compared with evaporimeter, needs larger heating surface, and original water-cooled cooling chute space is inadequate, need expand chute sectional area and volume.According to which recovery waste heat, need transform cooling trough apparatus body; (2) although employing protective sleeve, alloy melt liquid, fundamentally do not solve the etching problem that plumbous zinc melts liquid, chute boiler is respectively heated bobbin carriage within operation a period of time, and still can be subject to the corrosion that plumbous zinc melts liquid, the life-span is too short, needs periodic replacement.(3) heat-transfer pipe adopts finned heat exchanger, and superheated steam parameters of temperature is higher, and no matter require very high to device fabrication, welded steel, can only realize exemplary engineering, its investment is high, installs complicated, cannot realize the through engineering approaches application of scale.
Summary of the invention
For prior art Problems existing, the object of the present invention is to provide a kind ofly can improve energy-saving horizontal that closed blast furnace smelts, the ISP that reduces process energy consumption cools chute afterheat boiler system.
For achieving the above object, a kind of ISP of the present invention cools chute afterheat boiler system, comprise drum, the some groups of chute heat exchangers be arranged side by side, chute heat exchanger comprises plumbous zinc chute, pectination heat exchange box and heat exchanger tube, wherein, plumbous zinc chute melts liquid built with plumbous zinc, the bottom of pectination heat exchange box is immersed plumbous zinc and is melted in liquid, pectination heat exchange box melts liquid built with low-melting alloy, heat exchanger tube is immersed in low-melting alloy and melts in liquid, and drum is communicated with to feed water to it with the water inlet of heat exchanger tube by down-comer, the gas outlet of heat exchanger tube is communicated with to come to its exhaust steam with drum by tedge.
Further, described pectination heat exchange box adopts stainless steel material to make.
Further, the lateral wall of described pectination heat exchange box is provided with corrosion resistant insulating segment, this corrosion resistant insulating segment is be arranged on the insulating protective layer that faying face place that described pectination heat exchange box and described plumbous zinc melts liquid has Zinc-corrosion resistant.
Further, described insulating protective layer adopts Inorganic Non-metallic Materials to make.
Further, described heat exchanger tube adopts steel pipe to make, and steel pipe is coiled into bellows structure.
Further, be provided with the device for monitoring liquid level of the level change for monitoring described low-melting alloy in described pectination heat exchange box, this device for monitoring liquid level is arranged on the top of pectination heat exchange box inner chamber.
Further, the original water inlet of described drum, after oxygen-eliminating device deoxygenation, is squeezed in drum by feed pump.
Further, the feedwater of described drum is assigned in chute heat exchanger described in several by forced circulation pump.
The present invention has effectively reclaimed plumbous zinc in chute and has melted liquid is cooled to 450 DEG C waste heat from 550 DEG C, chute afterheat heat exchanger adopts anti-corrosion insulating layer to solve the corrosion that plumbous zinc melts liquid heat exchanger, adopt the form recovery waste heat of saturated vapor, without the need to changing original technological process body, more easily realize through engineering approaches application.This system can improve the energy-saving horizontal that closed blast furnace is smelted, and reduces process energy consumption.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is chute heat exchanger structure schematic diagram one;
Fig. 3 is heat exchange tube structure schematic diagram;
Fig. 4 is chute heat exchanger structure schematic diagram two.
Detailed description of the invention
Below, with reference to accompanying drawing, the present invention is more fully illustrated, shown in the drawings of exemplary embodiment of the present invention.But the present invention can be presented as multiple multi-form, and should not be construed as the exemplary embodiment being confined to describe here.But, these embodiments are provided, thus make the present invention comprehensively with complete, and scope of the present invention is fully conveyed to those of ordinary skill in the art.
For ease of illustrating, here can use such as " on ", the space relative terms such as D score " left side " " right side ", for illustration of the element of shown in figure or the feature relation relative to another element or feature.It should be understood that except the orientation shown in figure, spatial terminology is intended to comprise device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as the element being positioned at other elements or feature D score will be positioned at other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise be located (90-degree rotation or be positioned at other orientation), and space used here illustrates relatively can correspondingly explain.
As shown in Figures 1 to 4, a kind of ISP of the present invention cools chute afterheat boiler system, comprises some groups of the chute heat exchangers 1 be arranged side by side, corrosion resistant insulating segment, drum 3, forced circulation pump 5, lifting device 7, liquid level sensors 8.Chute heat exchanger 1 comprises plumbous zinc chute 10, pectination heat exchange box 6 and heat exchanger tube 14, wherein, plumbous zinc chute 10 melts liquid built with plumbous zinc, the bottom of pectination heat exchange box 6 is immersed plumbous zinc and is melted in liquid, pectination heat exchange box 6 melts liquid built with low-melting alloy 13, heat exchanger tube 14 is immersed in low-melting alloy 13 and melts in liquid, and drum 3 is communicated with to feed water to it with the water inlet of heat exchanger tube 14 by down-comer 2, and the gas outlet of heat exchanger tube 14 is communicated with to come to its exhaust steam with drum 3 by tedge 4.
Pectination heat exchange box 6 adopts stainless steel material, is immersed in high-temperature lead zinc and melts in liquid and absorb heat.The pectination heat exchange box 6 of stainless steel has good thermal conductivity and thermal shock resistance, has again sufficiently high intensity and toughness simultaneously.Be filled to low-melting alloy 13 in casing and melt liquid as intermediate heat transfer medium, the thermal conductivity of low-melting alloy 13 is good, exchange heat pipe and pectination heat exchange box 6 corrosion-free, heat exchanger tube is avoided to reveal because the corrosion being subject to zinc produces, water drains to plumbous zinc and melts generation moment explosive evaporation in liquid, decreases the danger that heat exchanger runs.
The lateral wall of pectination heat exchange box 6 is provided with corrosion resistant insulating segment; this corrosion resistant insulating segment refers to that pectination heat exchange box 6 have employed the insulating protective layer 9 of Zinc-corrosion resistant at the faying face (i.e. surperficial zinc layers) that plumbous zinc melts liquid; a circle diaphragm of resistance to zinc is formed at pectination heat exchange box 6 surperficial zinc liquid liquid level place; insulating protective layer 9 adopts the best Inorganic Non-metallic Materials of current refractory zinc to make, and can solve etching problem.The severe corrosive of plumbous zinc fused solution is mainly derived from zinc, because the activity of zinc is too strong, and substantially can with all metal generation displacement reactions.In the plumbous zinc fused solution of plumbous zinc chute 10, Zn content is little; generally be no more than 5%; because the liquid-tight degree of zinc is lower than plumbous liquid; zinc liquid floats on plumbous liquid surface; form surperficial zinc layers, test proves corrosion corrosion of metal mainly being come to surperficial zinc layers, if adopt insulating protective layer 9; then fundamentally solve the problem of zine corrosion, greatly can extend the service life of pectination heat exchange box 6.Corrosion resistant insulating segment only arranges a circle at liquid level place, only takies one section that pectination heat exchange box 6 upper area is very little, takies heating surface area less, very little to the overall heat exchange performance impact of chute heat exchanger 1.
Chute afterheat boiler system of the present invention only establishes evaporating surface, and institute's producing steam is saturated vapor, and steam pressure is set to low pressure parameter.Only establish evaporating surface, relative to existing chute body construction size constancy.
Heat exchanger tube 14 adopts steel pipe, and heat exchange property is good, and system is simple and reliable.
Low-melting alloy 13 in pectination heat exchange box 6 pairs of casings have employed liquid level monitoring, is provided with device for monitoring liquid level 8 in pectination heat exchange box 6, by learning whether pectination heat exchange box 6 is corroded to the level change monitoring of low-melting alloy in casing 13.Adopt this mode mainly from security standpoint, prevent due to run time heat exchanger tube 14 occur corrosion cause water enter plumbous zinc melt liquid boiling blast special circumstances.Adopt liquid level monitoring system to realize remote monitoring, decrease the labour intensity of operations staff, be reduced in the risk of deathtrap operation.
Drum 3 collects the steam water interface that each pectination heat exchange box 6 produces, and is separated in drum 3, produces saturated vapor.
In the present invention, boiler feedwater is after oxygen-eliminating device 11 deoxygenation, squeeze in drum 3 by feed pump 12, and then enter down-comer 2, by forced circulation pump 5, boiler feedwater is assigned in multiple chute heat exchanger 1 by down-comer 2 again, feedwater absorbs the waste heat of plumbous zinc fused solution in plumbous zinc chute 10 in chute heat exchanger 1, saturation water and steam is become after intensification, steam water interface enters tedge 4 and turns back in drum 3, in drum 3, carry out carbonated drink separation create saturated vapor, according to the needs of user, steam can have multiple use.
Chute heat exchanger 1 is immersed in plumbous zinc chute 10 by pectination heat exchange box 6 and absorbs heat; melt on the liquid level of liquid at plumbous zinc, pectination heat exchange box 6 arranges a circle insulating protective layer of resistance to zinc 9, and insulating protective layer 9 adopts non-thermally conductive material; do not participate in heat exchange, therefore can adopt nonmetallic materials manufacture.In addition, consider safe operation, in the casing of chute heat exchanger 1, have employed low-melting alloy 13, prevent because the reasons such as corrosion make water enter plumbous zinc melt liquid.In addition, although adopt insulating barrier to solve etching problem, but because the corrosivity that zinc is strong, adopt the slow corrosion after all unavoidable Long-Time Service of which kind of material, therefore, device for monitoring liquid level 8 is set in pectination heat exchange box 6, if there is corrosion in pectination heat exchange box 6 after longtime running, low-melting alloy 13 liquid level then in pectination heat exchange box 6 will change, during design, the liquid level of low-melting alloy 13 is by the liquid level far above plumbous zinc chute 10, once there is corrosion in chute pectination heat exchange box 6, then the liquid level of low-melting alloy 13 will reduce, then can judge to need more switching heat-exchanger 1, lifting device 7 by top promotes pectination heat exchange box 6, opened and closed by valve combination and change online.
The present invention is than the superiority of original chute boiler:
1., owing to present invention employs liquid level insulation corrosion resistant layer, fundamentally solve the problem that plumbous zinc melts corrosion, and the impact of heat exchanging is very little.
2., owing to present invention employs saturated vapor recovery waste heat, without the need to adopting the superheating system of bulky complex, the simple controllability of system is strong, and without the need to transforming original chuting system.
3. because the present invention adopts light pipe heat exchanger, steam parameter is also lower, and without the need to finned tube, system is simple, can realize the engineer applied of scale.
Claims (7)
1. an ISP cools chute afterheat boiler system, it is characterized in that, this system comprises drum, the some groups of chute heat exchangers be arranged side by side, chute heat exchanger comprises plumbous zinc chute, pectination heat exchange box and heat exchanger tube, wherein, plumbous zinc chute melts liquid built with plumbous zinc, the bottom of pectination heat exchange box is immersed plumbous zinc and is melted in liquid, pectination heat exchange box melts liquid built with low-melting alloy, heat exchanger tube is immersed in low-melting alloy and melts in liquid, and drum is communicated with to feed water to heat exchanger tube with the water inlet of heat exchanger tube by down-comer, the gas outlet of heat exchanger tube is communicated with to come to drum exhaust steam with drum by tedge, the lateral wall of described pectination heat exchange box is provided with corrosion resistant insulating segment, this corrosion resistant insulating segment is be arranged on the insulating protective layer that faying face place that described pectination heat exchange box and described plumbous zinc melts liquid has Zinc-corrosion resistant, chute afterheat boiler system only establishes evaporating surface, and institute's producing steam is saturated vapor, and steam pressure is set to low pressure parameter.
2. ISP as claimed in claim 1 cools chute afterheat boiler system, it is characterized in that, described pectination heat exchange box adopts stainless steel material to make.
3. ISP as claimed in claim 1 cools chute afterheat boiler system, it is characterized in that, described insulating protective layer adopts Inorganic Non-metallic Materials to make.
4. ISP as claimed in claim 1 cools chute afterheat boiler system, it is characterized in that, described heat exchanger tube adopts steel pipe to make, and steel pipe is coiled into bellows structure.
5. ISP as claimed in claim 1 cools chute afterheat boiler system, it is characterized in that, be provided with the device for monitoring liquid level of the level change for monitoring described low-melting alloy in described pectination heat exchange box, this device for monitoring liquid level is arranged on the top of pectination heat exchange box inner chamber.
6. ISP as claimed in claim 1 cools chute afterheat boiler system, and it is characterized in that, the original water inlet of described drum, after oxygen-eliminating device deoxygenation, is squeezed in drum by feed pump.
7. ISP as claimed in claim 1 cools chute afterheat boiler system, and it is characterized in that, the feedwater of described drum is assigned in chute heat exchanger described in several by forced circulation pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005614.4A CN103063041B (en) | 2013-01-08 | 2013-01-08 | ISP (imperial smelting process) cooling chute waste heat boiler system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310005614.4A CN103063041B (en) | 2013-01-08 | 2013-01-08 | ISP (imperial smelting process) cooling chute waste heat boiler system |
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| CN103063041B true CN103063041B (en) | 2015-02-04 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10035830A1 (en) * | 2000-07-22 | 2002-02-07 | Reflex Winkelmann & Pannhoff G | Apparatus for cooling exothermally operating production plants, e.g. blast and cupola furnaces, comprises cooling water cycle with cooling water supply container and degassing device for degassing cooling water |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010047004A1 (en) * | 2008-10-21 | 2010-04-29 | スチールプランテック株式会社 | Waste heat recovery facility of arc furnace for steel-making and method for recovering waste heat |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10035830A1 (en) * | 2000-07-22 | 2002-02-07 | Reflex Winkelmann & Pannhoff G | Apparatus for cooling exothermally operating production plants, e.g. blast and cupola furnaces, comprises cooling water cycle with cooling water supply container and degassing device for degassing cooling water |
Non-Patent Citations (2)
| Title |
|---|
| 溜槽锅炉-利用ISP冷却溜槽的余热发电;高宪有;《中国有色冶金》;19851231(第4期);40-43 * |
| 耐液锌腐蚀材料的研究进展;赵磊等;《材料保护》;20080531;第41卷(第5期);62-64 * |
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