CN203159633U - Device for efficiently utilizing blast furnace slag sensible heat - Google Patents

Device for efficiently utilizing blast furnace slag sensible heat Download PDF

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Publication number
CN203159633U
CN203159633U CN2013200987796U CN201320098779U CN203159633U CN 203159633 U CN203159633 U CN 203159633U CN 2013200987796 U CN2013200987796 U CN 2013200987796U CN 201320098779 U CN201320098779 U CN 201320098779U CN 203159633 U CN203159633 U CN 203159633U
Authority
CN
China
Prior art keywords
blast furnace
sensible heat
slag
furnace slag
fluidized bed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN2013200987796U
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Chinese (zh)
Inventor
赵海浩
华玉龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU YITONG ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd
Original Assignee
JIANGSU YITONG ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU YITONG ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd filed Critical JIANGSU YITONG ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co Ltd
Priority to CN2013200987796U priority Critical patent/CN203159633U/en
Application granted granted Critical
Publication of CN203159633U publication Critical patent/CN203159633U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2400/00Treatment of slags originating from iron or steel processes
    • C21B2400/02Physical or chemical treatment of slags
    • C21B2400/022Methods of cooling or quenching molten slag
    • C21B2400/026Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2400/00Treatment of slags originating from iron or steel processes
    • C21B2400/05Apparatus features
    • C21B2400/066Receptacle features where the slag is treated
    • C21B2400/076Fluidised bed for cooling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2400/00Treatment of slags originating from iron or steel processes
    • C21B2400/08Treatment of slags originating from iron or steel processes with energy recovery
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies

Abstract

The utility model relates to a device for efficiently utilizing blast furnace slag sensible heat. The device is characterized by comprising a blast furnace (1), a circulating fluid bed (3) and a steam turbine (5), wherein a sealed flow chute (2) is arranged at an outlet of the blast furnace (1) and an inlet of the circulating fluid bed (3); the upper part of the circulating fluid bed (3) is connected with the steam turbine (5); and the circulating fluid bed (3) is provided with a secondary air port (6) and a feed port (7). The device for efficiently utilizing blast furnace slag sensible heat has the advantages that under the condition that recycling utilization of blast furnace slag is ensured, the sensible heat of hot molten slag is used as much as possible, and relatively good economic benefit and environmental benefit are achieved.

Description

A kind of device that efficiently utilizes blast-furnace cement sensible heat
Technical field
The utility model relates to a kind of device that utilizes blast-furnace cement sensible heat.The field that belongs to UTILIZATION OF VESIDUAL HEAT IN.
Background technology
At present, iron and steel enterprise whenever produces 1 ton of pig iron and produces the 300kg liquid blast furnace approximately in blast furnace production process, and the temperature of these hot slag is about 1400 ~ 1600 ℃, and hot slag per ton contains the sensible heat of 1700MJ approximately, is equivalent to the calorific value of 58kg standard coal.With 1 3200m 3Blast furnace be example, per hour produce the 100t hot slag approximately, be equivalent to the calorific value of 5.8t standard coal, be enough to produce the high-grade steam of 40t/h.From the eighties in 20th century, in the world some developed countries as Japan, the U.S., Britain, Germany etc. just from the angle of energy-conservation and environmental protection, active development hot slag sensible heat resource.At present the sensible heat recovery method of hot slag roughly is divided into two classes: a class is to utilize recirculated air to reclaim the slag sensible heat, reclaims sensible heat by waste heat boiler with the form of steam then, as the wind method of quenching; Another kind of is that high temperature furnace slag is injected in the container, and around container cools off with water cycle, reclaims the slag sensible heat with vapor form, as annular bed method.No matter above-mentioned which kind of method still is in the type approval test stage at present abroad, its heat recuperation rate reaches as high as about 70%, but because economic return is relatively poor, the equipment enlarging difficulty is bigger, all sensible heat utilization technology all fail to realize industrial applications.Most of Steel Plant of China then adopt water quenching, and hot slag is at high temperature handled with the water at low temperature chilling, obtain the high added value slag particle of 90% above vitrifying rate, for the additive of products such as cement.The shortcoming of water quenching is: the sensible heat of blast furnace slag can't utilize, and causes a large amount of wastes of water resources, and atmosphere, water and soil earth have also been caused pollution in various degree, aggravating working environment.Therefore, it is the technical bottleneck that the Sustainable development of present steel industry demands urgently breaking through that blast furnace slag granulation and efficient higher-grade sensible heat reclaim, and also is the focus of China's energy-saving and emission-reduction.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of device that efficiently utilizes blast-furnace cement sensible heat is provided, and solves the unserviceable problem of blast-furnace cement sensible heat, solves the various pollution problems that existing water quenching exists simultaneously.
The purpose of this utility model is achieved in that a kind of device that efficiently utilizes blast-furnace cement sensible heat, it comprises blast furnace, circulating fluidized bed and steam turbine, be provided with the sealing chute in the exit of described blast furnace and the ingress of circulating fluidized bed, described circulating fluidized bed top links to each other with steam turbine, and described circulating fluidized bed is provided with overfiren air port and material inlet.
The hot slag more than 1400 ℃ that blast furnace is discharged is by the bottom of introducing circular fluid bed by the sealing chute; upwards sent into through air distribution plate by the blast furnace bottom by pressurized air; high-speed air is with hot slag winding-up, granulation; the sensible heat of hot slag is brought burner hearth inside into by air and grain slag; and pass to the water pipe heating surface of burner hearth internal layout; sensible heat more than 90% is all changed into the superheated vapour of High Temperature High Pressure by hot slag, send into steam turbine power generation.
Velocity of compressed air and pressure can be according to the flow adjustment of hot slag, to guarantee the effect of hot slag granulation.Because blast furnace slag is to discharge from blast furnace off and on, in order to realize the continuity of boiler producing steam, on blast furnace 1, also be provided with an overfiren air port 6 and a material inlet 7, when blast furnace slag interruption or decrement, can pass through the material inlet postcombustion, increase combustion air at overfiren air port simultaneously, continuous, stable to guarantee the burner hearth internal heat resource.
Compared with prior art, the utlity model has following beneficial effect:
1, the hot slag sensible heat that is interrupted is converted into continuous superheated vapour, and generating;
2, hot slag is admitted to burner hearth fully, sensible heat utilization rate height;
3, hot slag compressed air quick cooling at high temperature, slag particleization is effective, and diameter is even, and glassy phase can be used in productions such as cement fully greater than 90% in the product;
4, in circulating fluidized bed inside, grain slag and burner hearth internal surface good effect of heat exchange, equipment investment cost is low.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Wherein: blast furnace 1
Sealing chute 2
Circulating fluidized bed 3
Pressurized air 4
Steam turbine 5
Overfiren air port 6
Material inlet 7.
Embodiment
Referring to Fig. 1, the utility model relates to a kind of device that efficiently utilizes blast-furnace cement sensible heat, comprise blast furnace 1, circulating fluidized bed 3 and steam turbine 5, be provided with sealing chute 2 in the exit of described blast furnace 1 and the ingress of circulating fluidized bed 3, the top of described circulating fluidized bed 3 links to each other with steam turbine 5, and described circulating fluidized bed 3 is provided with overfiren air port 6 and material inlet 7.
Certain blast furnace is 3200m 3, on average per hour produce the 100t hot slag approximately, to slag tap once in per 2.5 hours, the time length of slagging tap is 2 hours, interrupts 0.5 hour.After adopting the utility model, 90% hot slag sensible heat is converted into superheated vapour, when slagging tap interruption, replenish with steel mill's blast furnace gas, circular fluid bed per hour produces higher-grade superheated vapour 42t, the scale of auxiliary generator group is 8MW, calculates with the electricity price of 0.5 yuan/kWh, and annual income can reach 3,200 ten thousand yuan.Under the prerequisite of the use value that does not influence grain slag, can also avoid water resource waste and environmental pollution, not only had high economic benefit, but also good environmental benefit arranged.

Claims (1)

1. device that efficiently utilizes blast-furnace cement sensible heat, it is characterized in that it comprises blast furnace (1), circulating fluidized bed (3) and steam turbine (5), be provided with sealing chute (2) in the exit of described blast furnace (1) and the ingress of circulating fluidized bed (3), described circulating fluidized bed (3) top links to each other with steam turbine (5), and described circulating fluidized bed (3) is provided with overfiren air port (6) and material inlet (7).
CN2013200987796U 2013-03-05 2013-03-05 Device for efficiently utilizing blast furnace slag sensible heat Withdrawn - After Issue CN203159633U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013200987796U CN203159633U (en) 2013-03-05 2013-03-05 Device for efficiently utilizing blast furnace slag sensible heat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013200987796U CN203159633U (en) 2013-03-05 2013-03-05 Device for efficiently utilizing blast furnace slag sensible heat

Publications (1)

Publication Number Publication Date
CN203159633U true CN203159633U (en) 2013-08-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013200987796U Withdrawn - After Issue CN203159633U (en) 2013-03-05 2013-03-05 Device for efficiently utilizing blast furnace slag sensible heat

Country Status (1)

Country Link
CN (1) CN203159633U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103160624A (en) * 2013-03-05 2013-06-19 江苏一同环保工程技术有限公司 Device for using sensible heat of blast furnace slag with high efficiency
CN106636501A (en) * 2017-02-27 2017-05-10 安徽工业大学 Blast furnace slag granulation engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103160624A (en) * 2013-03-05 2013-06-19 江苏一同环保工程技术有限公司 Device for using sensible heat of blast furnace slag with high efficiency
CN103160624B (en) * 2013-03-05 2015-02-11 江苏一同环保工程技术有限公司 Device for using sensible heat of blast furnace slag with high efficiency
CN106636501A (en) * 2017-02-27 2017-05-10 安徽工业大学 Blast furnace slag granulation engine
CN106636501B (en) * 2017-02-27 2019-03-05 安徽工业大学 A kind of blast furnace slag granulation engine

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20130828

Effective date of abandoning: 20150211

RGAV Abandon patent right to avoid regrant