CN202808832U - Blast furnace cinder flushing water and waste steam low-temperature waste heat thermoelectric dual-supply system - Google Patents

Blast furnace cinder flushing water and waste steam low-temperature waste heat thermoelectric dual-supply system Download PDF

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Publication number
CN202808832U
CN202808832U CN2012204406379U CN201220440637U CN202808832U CN 202808832 U CN202808832 U CN 202808832U CN 2012204406379 U CN2012204406379 U CN 2012204406379U CN 201220440637 U CN201220440637 U CN 201220440637U CN 202808832 U CN202808832 U CN 202808832U
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water
hot water
blast furnace
subsystem
heat
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Expired - Fee Related
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CN2012204406379U
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曹先常
王芳
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Shanghai Baosteel Energy Service Co Ltd
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Shanghai Baosteel Energy Service Co Ltd
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    • 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
    • C21B2400/024Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • 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

Abstract

The utility model discloses a blast furnace cinder flushing water and waste steam low-temperature waste heat thermoelectric dual-supply system which comprises a blast furnace cinder flushing subsystem, a precipitation heat exchange subsystem, a hot water supply subsystem and a hot water power generation subsystem, wherein the blast furnace cinder flushing subsystem, the precipitation heat exchange subsystem and the hot water supply subsystem are connected for carrying out heat exchange between cinder flushing water and clear water; and the hot water supply subsystem is connected with the hot water power generation subsystem, so that the clear water enters the hot water power generation subsystem to be taken as a heat source for generating electricity after heat exchange. Compared with the prior art, when being used for recovering and utilizing the low-temperature waste heat of the blast furnace cinder flushing water and the waste steam, the system has the beneficial effects that 1, the function of thermoelectric dual co-production is provided by the system, so that good condition is provided for a heat consumer who uses heat power; meanwhile, the heat of the cinder flushing system can be recovered in an omnibearing way, so that the efficiency of the power generation system can be improved; and 2, the waste heat resource of the blast furnace cinder flushing water and the waste steam is recovered by the system, so that the energy is saved, the emission is reduced, and good economic benefit and social benefit can be obtained.

Description

The thermoelectric duplex of a kind of blast furnace slag quenching water and weary steam low-temperature waste heat is for system
Technical field
The utility model relates to a kind of waste heat of coke-oven flue gas recovery and utilization technology field, and particularly the thermoelectric duplex of a kind of blast furnace slag quenching water and weary steam low-temperature waste heat is for system.
Background technology
Produce temperature in the blast furnace ironmaking process up to 1450 ℃ of high-temperature molten slags, contain a large amount of residual heat resources.Existing technique mainly adopts the shrend mode to carry out recycling treatment, produce a large amount of weary steam and hot flushing cinder water during furnace slag granulating, heat of slags is discharged in the environment via weary steam and hot flushing cinder water, needs a large amount of electric power during simultaneously flushing cinder water cycle cooling, causes heat energy, the waste of electric power equal energy source.Iron and steel enterprise needs a large amount of higher-grade steam to use as hot user simultaneously, the un-reasonable phenomenon that high-quality energy low-quality is used occurs.
Furnace slag granulating technique is very ripe, and " grain slag " of generation has very high activity, not only can be used as the grog of cement, can be used as very much construction industry concrete " additive ".Northeastern University and some scientific research institution once recycled research with quench method and additive method of wind to the blast-furnace slag waste heat, but made slag be difficult to recycling because this method has changed the final activity of slag, therefore can't promotion and implementation.
There is at present a small amount of blast furnace slag quenching water waste heat recovery to be mainly used in warming or daily having a bath, but because blast furnace slag quenching water water quality is subjected to the factor affecting such as blast furnace mineral aggregate, water quality is changeable, can't directly use, more flushing cinder water and weary steam low-temperature residual heat resources directly are discharged in the atmospheric environment by cooling tower.Even to blast furnace slag quenching water and waste heat recovery that weary steam is with and utilization, but the recovery that exists the slag system institute heat content that liquidates is used not thorough, a large amount of bands have surplus heat weary steam by chimney discharged to atmosphere, increase thermal pollution that weary steam chimney causes and the problem of visual pollution; Simultaneously, blast furnace slag quenching water and weary steam are with a large amount of residual heat resources wastes, and discharging enters atmosphere and pollutes, and produces serious society and environmental problem.
The utility model content
The utility model purpose is to provide a kind of blast furnace slag quenching water and the thermoelectric duplex of weary steam low-temperature waste heat for system, even to solve in the prior art blast furnace slag quenching water and waste heat recovery that weary steam is with and utilization, but the recovery that exists the slag system institute heat content that liquidates is used not thorough, a large amount of bands have surplus heat weary steam by chimney discharged to atmosphere, increase thermal pollution that weary steam chimney causes and the problem of visual pollution, simultaneously, blast furnace slag quenching water and weary steam are with a large amount of residual heat resources wastes, discharging enters atmosphere and pollutes, and produces serious society and the technical matters of environmental problem.
The utility model purpose is achieved through the following technical solutions:
The thermoelectric duplex of a kind of blast furnace slag quenching water and weary steam low-temperature waste heat is for system, comprise the blast furnace slag flushing subsystem, precipitation heat exchange subsystem, hot water service subsystem and hot water power generation sub-system, the blast furnace slag flushing subsystem comprises quenching of the blast furnace slag prilling granulator that produces weary steam and high temperature flushing cinder water, precipitation heat exchange subsystem further comprises settling tank and lack steam thermal amount withdrawer, the high temperature flushing cinder water out of quenching of blast furnace slag prilling granulator connects settling tank, the outlet of settling tank connects lack steam thermal amount withdrawer, the weary vapour outlet of quenching of blast furnace slag prilling granulator is connected to described settling tank by lack steam thermal amount withdrawer, the outlet of lack steam thermal amount withdrawer is connected to described hot water service subsystem, described hot water service subsystem comprises the water purification interchanger, flushing cinder water cooling tower and heat preservation hot water tank, described water purification interchanger flushing cinder water inlet end is connected with lack steam thermal amount withdrawer flushing cinder water out, described water purification interchanger flushing cinder water out is connected with the cooling tower import, the cooling tower outlet is connected to quenching of blast furnace slag prilling granulator flushing cinder water inlet, described water purification interchanger water supplement port connects the water purification water supplement port, water purification exchanger heat water out connects the heat preservation hot water tank hot water inlet, the heat preservation hot water tank hot water outlet is connected with the hot water power generation sub-system with hot water user import respectively, described hot water power generation sub-system comprises vaporizer, the dynamic power unit, condenser and working medium pump, described vaporizer, the dynamic power unit, condenser and working medium pump connect to form the low boiling working fluid low-temperature generation device successively, described vaporizer hot water inlet connects the heat preservation hot water tank hot water outlet, the vaporizer hot water outlet connects water purification interchanger water supplement port, and system comprises following circulation passage.
Weary steam became water of condensation after the weary steam process lack steam thermal amount withdrawer that described quenching of blast furnace slag prilling granulator produces and flushing cinder water carried out heat exchange, then enter settling tank, quenching of blast furnace slag prilling granulator, lack steam thermal amount withdrawer and settling tank form weary vapour stream circulation passage thus; The flushing cinder water that described quenching of blast furnace slag prilling granulator produces purifies through settling tank, again through the heat exchange of lack steam thermal amount withdrawer, send into and enter the cooling tower cooling after water purification interchanger and water purification carry out heat exchange, cooling backlash pulp water send quenching of blast furnace slag prilling granulator flushing cinder water inlet to continue flushing cinder again, and quenching of blast furnace slag prilling granulator, settling tank, lack steam thermal amount withdrawer, water purification interchanger and cooling tower form the whole recycle passage of flushing cinder water successively; After entering heat preservation hot water tank after described water purification is overheated by water purification interchanger water supplement port, a part send the hot water user to use, another part is sent into the low boiling working fluid low-temperature generation device and is utilized its heat generating, it continues the heat exchange use through entering the water purification interchanger after the power generation system, and the vaporizer of described water purification interchanger, heat preservation hot water tank and power generation system forms water purification recycle passage.
Valuably, the thermoelectric two method of combined supply of a kind of blast furnace slag quenching water and weary steam low-temperature waste heat is characterized in that, may further comprise the steps:
(1) produce a large amount of weary steam and certain temperature flushing cinder water during quenching of blast furnace slag prilling granulator flushing cinder, the weary steam chimney of weary steam flow, flushing cinder water are removed contained macrobead in the water behind sedimentation tank filter;
(2) flushing cinder water is sent into lack steam thermal amount withdrawer by water pump, and the heat that lack steam thermal amount withdrawer reclaims weary steam from weary steam chimney continues as flushing cinder water extraction intensification degree, and vapor condenses is that water flows into settling tank after the heat exchange;
(3) the flushing cinder water after the temperature increase enters the flushing cinder water cooling tower after sending the heat release of water purification interchanger, and cooling send quenching of blast furnace slag prilling granulator to continue flushing cinder by water pump;
(4) water purification enters the water purification interchanger by the moisturizing entrance and flushing cinder water carries out sending heat preservation hot water tank after the heat exchange;
(5) a hot water part flows to hot water user use through water pump in the heat preservation hot water tank;
(6) another part hot water enters in the vaporizer of power generation system and the organic working medium heat exchange through water pump in the heat preservation hot water tank, returns the water purification interchanger after the heat exchange and continues heating;
(7) heated organic working medium is used by the dynamic power unit acting generating user that transmits electric power.
Compared with prior art, the utility model has following beneficial effect:
1, the thermoelectric duplex of a kind of blast furnace slag quenching water of the present utility model and weary steam low-temperature waste heat provides the function of thermoelectric duplex product for system, for the good condition that provides is provided for hot user's heating power, simultaneously, the comprehensive recovery of slag system institute heat content that liquidates, thus improved power generation system efficient;
2, the thermoelectric duplex of a kind of blast furnace slag quenching water of the present utility model and weary steam low-temperature waste heat for system recoveries blast furnace slag quenching water and weary steam waste heat resource, save energy reduces discharging, produces good economic and social benefit.
Description of drawings
Fig. 1 is that the thermoelectric duplex of a kind of blast furnace slag quenching water of the present utility model and weary steam low-temperature waste heat is for the process flow sheet of system.
Embodiment
Below in conjunction with accompanying drawing, describe the utility model in detail.
See also accompanying drawing 1, the thermoelectric duplex of a kind of blast furnace slag quenching water and weary steam low-temperature waste heat is for system, comprise blast furnace slag flushing subsystem 1, precipitation heat exchange subsystem 2, hot water service subsystem 3 and hot water power generation sub-system 4, blast furnace slag flushing subsystem 1 comprises quenching of the blast furnace slag prilling granulator 11 that produces weary steam and high temperature flushing cinder water, precipitation heat exchange subsystem 2 further comprises settling tank 21 and lack steam thermal amount withdrawer 22, the high temperature flushing cinder water out of quenching of blast furnace slag prilling granulator 11 connects settling tank 21, the outlet of settling tank 21 connects lack steam thermal amount withdrawer 22, the weary vapour outlet of quenching of blast furnace slag prilling granulator 11 is connected to described settling tank 21 by lack steam thermal amount withdrawer 22,22 outlets of lack steam thermal amount withdrawer are connected to described hot water service subsystem 3, described hot water service subsystem 3 comprises water purification interchanger 31, flushing cinder water cooling tower 32 and heat preservation hot water tank 33, described water purification interchanger 31 flushing cinder water inlet ends are connected with lack steam thermal amount withdrawer 22 flushing cinder water outs, described water purification interchanger 31 flushing cinder water outs are connected with cooling tower 32 imports, cooling tower 32 outlets are connected to quenching of blast furnace slag prilling granulator 11 flushing cinder water inlets, described water purification interchanger 31 water supplement ports connect water purification water supplement port 34, water purification interchanger 31 hot water outlets connect heat preservation hot water tank 33 hot water inlets, heat preservation hot water tank 33 hot water outlets are connected with the hot water power generation sub-system with hot water user import 35 respectively and are connected, described hot water power generation sub-system 4 comprises vaporizer 41, dynamic power unit 42, condenser 43 and working medium pump 44, described vaporizer 41, dynamic power unit 42, condenser 43 connects to form the low boiling working fluid low-temperature generation device successively with working medium pump 44, described vaporizer 41 hot water inlets connect heat preservation hot water tank 33 hot water outlets, and vaporizer 41 hot water outlets connect water purification interchanger 31 water supplement ports.
System comprises following circulation passage, weary steam became water of condensation after the weary steam that described quenching of blast furnace slag prilling granulator 11 produces carried out heat exchange through lack steam thermal amount withdrawer 22 with flushing cinder water, then enter settling tank 21, quenching of blast furnace slag prilling granulator 11, lack steam thermal amount withdrawer 22 and settling tank 21 form weary vapour stream circulation passage thus; The flushing cinder water that described quenching of blast furnace slag prilling granulator 11 produces purifies through settling tank 21, again through the heat exchange of lack steam thermal amount withdrawer 22, send into and enter cooling tower 32 coolings after water purification interchanger 31 carries out heat exchange with water purification, cooling backlash pulp water send quenching of blast furnace slag prilling granulator 11 flushing cinder water inlets to continue flushing cinder again, and quenching of blast furnace slag prilling granulator 11, settling tank 21, lack steam thermal amount withdrawer 22, water purification interchanger 31 form the whole recycle passage of flushing cinder water with cooling tower 32 successively; After entering heat preservation hot water tank 33 after described water purification is overheated by water purification interchanger 31 water supplement ports, a part send the hot water user to use, another part is sent into the low boiling working fluid low-temperature generation device and is utilized its heat generating, it continues the heat exchange use through entering water purification interchanger 31 after the power generation system, and described water purification interchanger 31, heat preservation hot water tank 33 form water purification recycle passages with the vaporizer 41 of power generation system.
In addition, native system also comprises some water pumps 5, described water pump 5 is arranged at respectively outlet and lack steam thermal amount withdrawer 22 junctions, heat preservation hot water tank 33 hot water outlets and hot water user import 34 junctions, heat preservation hot water tank 33 hot water outlets and vaporizer 41 hot water inlet junctions, cooling tower 32 and quenching of the blast furnace slag prilling granulator 11 flushing cinder water inlet junctions of settling tank 21, and some water pumps of setting can make system's operation more smooth.
With reference to accompanying drawing 1, further implementation method of the present utility model is described.
This example may further comprise the steps:
(1) produce a large amount of weary steam and certain temperature flushing cinder water during quenching of blast furnace slag prilling granulator 11 flushing cinder, the weary steam chimney of weary steam flow, flushing cinder water is removed contained macrobead in the water after settling tank 21 filters;
(2) flushing cinder water is sent into lack steam thermal amount withdrawer 22 by water pump 5, and the heat that lack steam thermal amount withdrawer 22 reclaims weary steam from weary steam chimney continues as flushing cinder water extraction intensification degree, and vapor condenses is that water flows into settling tank 21 after the heat exchange;
(3) the flushing cinder water after the temperature increase enters flushing cinder water cooling tower 32 after sending 31 heat releases of water purification interchanger, and cooling send quenching of blast furnace slag prilling granulator 11 to continue flushing cinder by water pump 5;
(4) water purification enters water purification interchanger 31 by moisturizing entrance 34 and carries out sending heat preservation hot water tank 33 after the heat exchange with flushing cinder water;
(5) a hot water part flows to hot water user use through water pump 5 in the heat preservation hot water tank 33;
(6) another part hot water enters in the vaporizer 41 of power generation system and the organic working medium heat exchange through water pump 5 in the heat preservation hot water tank 33, returns water purification interchanger 31 after the heat exchange and continues heating;
(7) heated organic working medium is used by the dynamic power unit 42 acting generating user that transmits electric power.
Comprehensive the above the utility model structure and implementation method are as can be known, the thermoelectric duplex of a kind of blast furnace slag quenching water of the present utility model and weary steam low-temperature waste heat has following beneficial effect for system when recycling blast furnace slag quenching water and weary steam low-temperature waste heat: the one, and the function that system provides thermoelectric duplex to produce, for the good condition that provides is provided for hot user's heating power, simultaneously, the comprehensive recovery of slag system institute heat content that liquidates, thus power generation system efficient improved; The 2nd, system recoveries blast furnace slag quenching water and weary steam waste heat resource, save energy reduces discharging, produces good economic and social benefit.
More than disclosed only be several specific embodiments of the application, but the application is not limited thereto, the changes that any person skilled in the art can think of all should drop in the application's the protection domain.

Claims (1)

1. the thermoelectric duplex of a blast furnace slag quenching water and weary steam low-temperature waste heat is characterized in that for system, comprises blast furnace slag flushing subsystem, precipitation heat exchange subsystem, hot water service subsystem and hot water power generation sub-system,
The blast furnace slag flushing subsystem comprises quenching of the blast furnace slag prilling granulator that produces weary steam and high temperature flushing cinder water,
Precipitation heat exchange subsystem further comprises settling tank and lack steam thermal amount withdrawer, the high temperature flushing cinder water out of quenching of blast furnace slag prilling granulator connects settling tank, the outlet of settling tank connects lack steam thermal amount withdrawer, the weary vapour outlet of quenching of blast furnace slag prilling granulator is connected to described settling tank by lack steam thermal amount withdrawer, the outlet of lack steam thermal amount withdrawer is connected to described hot water service subsystem
Described hot water service subsystem comprises the water purification interchanger, flushing cinder water cooling tower and heat preservation hot water tank, described water purification interchanger flushing cinder water inlet end is connected with lack steam thermal amount withdrawer flushing cinder water out, described water purification interchanger flushing cinder water out is connected with the cooling tower import, the cooling tower outlet is connected to quenching of blast furnace slag prilling granulator flushing cinder water inlet, described water purification interchanger water supplement port connects the water purification water supplement port, water purification exchanger heat water out connects the heat preservation hot water tank hot water inlet, the heat preservation hot water tank hot water outlet is connected with the hot water power generation sub-system with hot water user import respectively, described hot water power generation sub-system comprises vaporizer, the dynamic power unit, condenser and working medium pump, described vaporizer, the dynamic power unit, condenser and working medium pump connect to form the low boiling working fluid low-temperature generation device successively, described vaporizer hot water inlet connects the heat preservation hot water tank hot water outlet, and the vaporizer hot water outlet connects water purification interchanger water supplement port.
CN2012204406379U 2012-08-31 2012-08-31 Blast furnace cinder flushing water and waste steam low-temperature waste heat thermoelectric dual-supply system Expired - Fee Related CN202808832U (en)

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CN2012204406379U CN202808832U (en) 2012-08-31 2012-08-31 Blast furnace cinder flushing water and waste steam low-temperature waste heat thermoelectric dual-supply system

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CN2012204406379U CN202808832U (en) 2012-08-31 2012-08-31 Blast furnace cinder flushing water and waste steam low-temperature waste heat thermoelectric dual-supply system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019174287A1 (en) * 2018-03-16 2019-09-19 南京有荣节能科技有限公司 Slag residual heat utilization device and molten slag granulation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019174287A1 (en) * 2018-03-16 2019-09-19 南京有荣节能科技有限公司 Slag residual heat utilization device and molten slag granulation method

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Address after: 201999 Baoshan District, G Road, Lane No. 550, No. 7, business building, floor 2, level 3, level

Patentee after: SHANGHAI BAOSTEEL ENERGY-SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD.

Address before: 201999, room 1813, No. 3245, Mudanjiang Road, Baoshan District, Shanghai, Baoshan District

Patentee before: Shanghai Baosteel Energy Tech Co., Ltd.

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Owner name: SHANGHAI BAOSTEEL ENERGY-SAVING + ENVIRONMENTAL-PR

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