CN102994668A - Utilization method for waste heat of blast furnace slag - Google Patents
Utilization method for waste heat of blast furnace slag Download PDFInfo
- Publication number
- CN102994668A CN102994668A CN2012105201258A CN201210520125A CN102994668A CN 102994668 A CN102994668 A CN 102994668A CN 2012105201258 A CN2012105201258 A CN 2012105201258A CN 201210520125 A CN201210520125 A CN 201210520125A CN 102994668 A CN102994668 A CN 102994668A
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- China
- Prior art keywords
- water
- flushing
- slag
- heat
- heat exchanger
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
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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
- Y02P10/20—Recycling
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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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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a utilization method for the waste heat of blast furnace slag, belonging to the technical field of utilization of the waste heat of furnace slag. A heat exchange station (6) is built nearby a sedimentation basin (1), and used for installing a spiral slag-flushing water special heat exchanger and a steam-water shell-and-tube head exchanger; the slag-flushing water of a blast furnace enters in a water suction well (3) through a water overflow basin (2), and is conveyed to the heat exchange station (6) from a slag-flushing water supply tube (5) through a slag-flushing pump room (4) at first, heating hot water returns to a slag-flushing main water supply pipeline after heat release, and enters in the slag opening of the blast furnace to perform slag-flushing; and the water-slag mixture enters in a stirring cage machine along a slag groove, enters in the sedimentation basin after being separated, enters in the water suction well (3) through sedimentation, overflow and a slag baffle, so as to form a slag-flushing water circulation system. The utilization method has the advantage that the sensible heat of the blast furnace slag is adequately utilized, thus achieving the purposes of energy conservation and emission reduction.
Description
Technical field:
The invention belongs to afterheat of slags and utilize technical field, a kind of blast furnace slag residual-heat utilization method particularly is provided, based on the UTILIZATION OF VESIDUAL HEAT IN of the steam of flushing cinder of the flushing cinder water that uses in the Ming Tefa blast furnace slag flushing technique and generation.
Background technology
Most domestic steel mill is aspect the blast furnace slag UTILIZATION OF VESIDUAL HEAT IN, UTILIZATION OF VESIDUAL HEAT IN efficient is low, and the equipment operation is loaded down with trivial details, and majority carries out waste heat recovery based on filter tank, end slag flushing process, and there is the obstruction interchanger based on the UTILIZATION OF VESIDUAL HEAT IN of Ming Tefa slag flushing process, the problem such as heat exchange efficiency is not high.The metallurgical magazine in Shandong directly adopts blast furnace slag quenching water to carry out heating once about pointing out in " application of blast furnace slag quenching water residual-heat heating ".Although the method UTILIZATION OF VESIDUAL HEAT IN efficient is higher, the equipment operation is simple, and have following drawback: 1, the fine-fibered in the pulp water stops up heating network easily; 2, affected by conditions of blast furnace for thermal conditions; 3, later stage running cost and pipe network maintenance cost are higher.The invention solves the problem and the drawback that exist in the general blast furnace slag flushing UTILIZATION OF VESIDUAL HEAT IN, fully guarantee the stable of equipment and heating continuously, reclaim to greatest extent the sensible heat of blast furnace slag.
Summary of the invention
The object of the present invention is to provide a kind of blast furnace slag residual-heat utilization method, use spiral flushing pulp water dedicated heat exchanger and vapour-water hull tubular heat exchanger that the sensible heat of blast furnace slag is carried out resident's heating by heat exchange to greatest extent, blast-furnace cement sensible heat is fully utilized, reaches the purpose of energy-saving and emission-reduction.
Near distance settling tank 1, build heat exchange station 6, in order to spiral flushing pulp water dedicated heat exchanger to be installed, model LXBG/W-0.6/1.2-III and vapour-water hull tubular heat exchanger, blast furnace slag quenching water at first is sent to heat exchange station 6 through flushing cinder pump house 4 by flushing cinder water-supply pipe 5 to suction well 3 through spillway basin 2, after the heating hot water heat release, return flushing cinder main-supply road, enter cinder monkey and carry out flushing cinder.The grain slag mixture enters processing machine along slag chute, enters settling tank after the initial gross separation, enters suction well through precipitation overflow and skimming plate, forms slag flushing water circulation system.Vapour-water circulation system (causes vapour-water hull tubular heat exchanger with the steam that produces in the flushing cinder process, condensed water after the steam heat release is condensed, as the flushing cinder moisturizing, formation vapour-water circulation system) after the vapour of middle steam of flushing cinder process heat exchange station 6 interior settings-water hull tubular heat exchanger heat release recovery, enter the flushing cinder water-supply line, as shown in Figure 1.
In heat exchange station, arrange spiral flushing pulp water dedicated heat exchanger and vapour-water hull tubular heat exchanger.The thermal source of spiral flushing pulp water dedicated heat exchanger is the flushing cinder water that contains a large amount of suspended substances, and the arc design of spiral flushing pulp water dedicated heat exchanger internal heat exchange tubes ingress has solved the blockage problem of heat exchanger tube sheet, as shown in Figure 2.The spirane structure design of spiral flushing pulp water dedicated heat exchanger internal heat exchange tubes is destroyed the frictional belt, and flow boundary layer and thermal boundary layer attenuate have been strengthened heat-transfer effect, have solved the blockage problem of heat transfer tube.Vapour-water hull tubular heat exchanger low-temperature receiver is heating water, and thermal source is steam of flushing cinder (temperature is up to more than 94 ℃), by the condensation heat release, reclaims water of condensation in the latent heat of vaporization in reclaiming steam of flushing cinder.Not only reclaim most of heat in the steam, reclaimed simultaneously water of condensation, reduced rate of water make-up.
, flow low according to the blast furnace slag flushing water temp is large, the vitrifying fiber is more, easily block up, have the characteristic such as corrodibility.The present invention according to fluid mechanics principle, breaks heat transfer tube inner laminar flow frictional belt on spiral flushing pulp water dedicated heat exchanger, not only increased surface film thermal conductance, strengthened heat transfer effect, simultaneously, the pulse eddy flow that spiral flushing pulp water dedicated heat exchanger produces has fundamentally solved the pipe network blockage problem.Heating system independent operating among the present invention, later stage running cost and pipe network maintenance cost are lower, and flushing cinder water and steam of flushing cinder complement one another, and heating stability is higher.Simultaneously, utilize vapour-water hull tubular heat exchanger, the recovered steam rate takes full advantage of heat up to 70%, and water of condensation is recycled to the flushing cinder pond, has greatly reduced flushing cinder water rate of water make-up.See by practical operation situation, stable, heat recovery rate is high.
Description of drawings
Fig. 1 is blast furnace slag residual-heat utilization method synoptic diagram.
Fig. 2 is spiral flushing pulp water dedicated heat exchanger principle.
Fig. 3 is spiral flushing pulp water dedicated heat exchanger heat exchange principle.
Embodiment
Near newly-built heat exchange station 6 distance settling tank 1, in order to spiral flushing pulp water dedicated heat exchanger and vapour-water hull tubular heat exchanger to be installed, blast furnace slag quenching water 5. at first is sent to heat exchange station 6 through flushing cinder pump house 4 by the flushing cinder water-supply pipe to suction well 3 through spillway basin 2, after the heating hot water heat release, return flushing cinder main-supply road, enter cinder monkey and carry out flushing cinder.The grain slag mixture enters processing machine along slag chute, enters settling tank after the initial gross separation, enters suction well through precipitation overflow and ad hoc skimming plate, forms slag flushing water circulation system.In vapour-water circulation system steam of flushing cinder through heat exchange station arrange in 6. after vapour-heat release of water hull tubular heat exchanger is reclaimed, enter the flushing cinder water-supply line, such as accompanying drawing 1.
In heat exchange station, arrange spiral flushing pulp water dedicated heat exchanger and vapour-water hull tubular heat exchanger.The thermal source of spiral flushing pulp water dedicated heat exchanger is the flushing cinder water that contains a large amount of suspended substances, arc design when flushing cinder water enters tube sheet has solved the blockage problem of tube sheet, shown in Fig. 2 spiral flushing pulp water dedicated heat exchanger principle, through the helical design structure, the frictional belt is destroyed, flow boundary layer and thermal boundary layer attenuate have been strengthened heat-transfer effect.The house steward place of flushing cinder water before entering interchanger, pulse power device regularly carries out disturbance to current, has stoped the formation of the impurity such as suspended substance in the frictional belt, further prevents the purpose stopped up thereby reached.Vapour-water hull tubular heat exchanger low-temperature receiver is heating water, and thermal source is steam of flushing cinder (temperature is up to more than 94 ℃), by the condensation heat release, reclaims the latent heat of vaporization in the steam of flushing cinder.Not only reclaim most of heat in the steam, reclaimed simultaneously water of condensation, reduced rate of water make-up.
According to data statistics, Ming Tefa blast furnace slag flushing technique, slag water ratio is pressed 1:8 and is calculated, the physics sensible heat heat content of blast furnace slag is 430-470kcal/kg, take away respectively the formal transformations such as physical thermal, other thermosteresis with flushing cinder water, steam of flushing cinder, slag, wherein, flushing cinder water accounts for 47%, steam of flushing cinder 42%, slag are taken away physical thermal and other thermosteresis accounts for 11%.The present invention reclaims sensible heat and the latent heat of vaporization of flushing cinder water, steam of flushing cinder respectively by spiral flushing pulp water dedicated heat exchanger and vapour-water hull tubular heat exchanger, and in order to heating nearby, the blast-furnace cement sensible heat rate of recovery surpasses 55%.
Claims (2)
1. a blast furnace slag residual-heat utilization method is characterized in that, processing step is:
Near distance settling tank (1), build heat exchange station (6), in order to spiral flushing pulp water dedicated heat exchanger to be installed, and vapour-water hull tubular heat exchanger, blast furnace slag quenching water at first is sent to heat exchange station (6) through flushing cinder pump house (4) by flushing cinder water-supply pipe (5) to suction well (3) through spillway basin (2), after the heating hot water heat release, return flushing cinder main-supply road, enter cinder monkey and carry out flushing cinder; The grain slag mixture enters processing machine along slag chute, enters settling tank after the separation, enters suction well (3) through precipitation overflow and skimming plate, forms slag flushing water circulation system;
The steam that produces in the flushing cinder process is caused vapour-water hull tubular heat exchanger, and the condensed water after the steam heat release is condensed as the flushing cinder moisturizing, forms vapour-water circulation system;
Steam of flushing cinder enters the flushing cinder water-supply line through after the interior vapour that arranges of heat exchange station (6)-heat release of water hull tubular heat exchanger is reclaimed in vapour-water circulation system;
The thermal source of spiral flushing pulp water dedicated heat exchanger is the flushing cinder water that contains a large amount of suspended substances, the arc design of spiral flushing pulp water dedicated heat exchanger internal heat exchange tubes ingress has solved the blockage problem of heat exchanger tube sheet, the spirane structure design of spiral flushing pulp water dedicated heat exchanger internal heat exchange tubes, the frictional belt is destroyed, flow boundary layer and thermal boundary layer attenuate, strengthen heat-transfer effect, solved the blockage problem of heat transfer tube; Vapour-water hull tubular heat exchanger low-temperature receiver is heating water, and thermal source is steam of flushing cinder, and temperature by the condensation heat release, reclaims water of condensation up to more than 94 ℃ in the latent heat of vaporization in reclaiming steam of flushing cinder.
2. blast furnace slag residual-heat utilization method according to claim 1 is characterized in that, the model of spiral flushing pulp water dedicated heat exchanger is LXBG/W-0.6/1.2-III.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105201258A CN102994668A (en) | 2012-12-06 | 2012-12-06 | Utilization method for waste heat of blast furnace slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105201258A CN102994668A (en) | 2012-12-06 | 2012-12-06 | Utilization method for waste heat of blast furnace slag |
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| CN102994668A true CN102994668A (en) | 2013-03-27 |
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| CN2012105201258A Pending CN102994668A (en) | 2012-12-06 | 2012-12-06 | Utilization method for waste heat of blast furnace slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278116A (en) * | 2013-07-11 | 2015-01-14 | 北京亿玮坤节能科技有限公司 | Blast furnace slag steam recovery method and system |
| CN107435971A (en) * | 2017-08-02 | 2017-12-05 | 中清源环保节能有限公司 | One kind utilizes directly-heated machine recovery steel mill exhaust heat of slag flushing water system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10130040A (en) * | 1996-10-25 | 1998-05-19 | Nkk Corp | Waste heat recovery method for water granulated slag production equipment and apparatus therefor |
| CN2748467Y (en) * | 2004-11-05 | 2005-12-28 | 马鞍山钢铁股份有限公司 | Water-quenching slag-washing water treatment device for blast furnace slag |
| LU91088B1 (en) * | 2004-07-14 | 2006-01-16 | Wurth Paul Sa | Method and device for granulating a melt |
| CN102392085A (en) * | 2011-11-21 | 2012-03-28 | 济南钢铁股份有限公司 | Blast furnace slag waste heat recycling system |
| 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 |
| CN102517411A (en) * | 2011-12-20 | 2012-06-27 | 青岛理工大学 | System and method for heating by using waste heat of blast furnace slag flushing water |
| CN102605114A (en) * | 2011-12-09 | 2012-07-25 | 河北省首钢迁安钢铁有限责任公司 | Slag flushing process and system for ironmaking |
| CN202482332U (en) * | 2012-01-21 | 2012-10-10 | 北京华泰润达节能科技有限公司 | System for recovering waste heat of slag flushing water of blast furnace |
| CN202530099U (en) * | 2012-04-23 | 2012-11-14 | 四平市欧森热工设备有限公司 | Heat exchanger for remained hot water of blast furnace |
-
2012
- 2012-12-06 CN CN2012105201258A patent/CN102994668A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10130040A (en) * | 1996-10-25 | 1998-05-19 | Nkk Corp | Waste heat recovery method for water granulated slag production equipment and apparatus therefor |
| LU91088B1 (en) * | 2004-07-14 | 2006-01-16 | Wurth Paul Sa | Method and device for granulating a melt |
| CN2748467Y (en) * | 2004-11-05 | 2005-12-28 | 马鞍山钢铁股份有限公司 | Water-quenching slag-washing water treatment device for blast furnace slag |
| CN102392085A (en) * | 2011-11-21 | 2012-03-28 | 济南钢铁股份有限公司 | Blast furnace slag waste heat recycling system |
| CN102605114A (en) * | 2011-12-09 | 2012-07-25 | 河北省首钢迁安钢铁有限责任公司 | Slag flushing process and system for ironmaking |
| CN102517411A (en) * | 2011-12-20 | 2012-06-27 | 青岛理工大学 | System and method for heating by using waste heat of blast furnace slag flushing water |
| 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 |
| CN202482332U (en) * | 2012-01-21 | 2012-10-10 | 北京华泰润达节能科技有限公司 | System for recovering waste heat of slag flushing water of blast furnace |
| CN202530099U (en) * | 2012-04-23 | 2012-11-14 | 四平市欧森热工设备有限公司 | Heat exchanger for remained hot water of blast furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278116A (en) * | 2013-07-11 | 2015-01-14 | 北京亿玮坤节能科技有限公司 | Blast furnace slag steam recovery method and system |
| CN107435971A (en) * | 2017-08-02 | 2017-12-05 | 中清源环保节能有限公司 | One kind utilizes directly-heated machine recovery steel mill exhaust heat of slag flushing water system |
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Application publication date: 20130327 |