CN202658165U - System for processing blast-furnace slag by dry method and continuously adopting waste heat - Google Patents

System for processing blast-furnace slag by dry method and continuously adopting waste heat Download PDF

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Publication number
CN202658165U
CN202658165U CN2012202527097U CN201220252709U CN202658165U CN 202658165 U CN202658165 U CN 202658165U CN 2012202527097 U CN2012202527097 U CN 2012202527097U CN 201220252709 U CN201220252709 U CN 201220252709U CN 202658165 U CN202658165 U CN 202658165U
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China
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waste heat
blast
furnace slag
boiler device
granulation
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Inventor
汪建业
李辉
刘福兰
王麟
肖闯
李天丽
吴定房
蒋鼎琮
杨浩
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SICHUAN CHUANRUN CO Ltd
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SICHUAN CHUANRUN 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
    • C21B2400/026Methods 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
    • C21B2400/052Apparatus features including rotating parts
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B2400/00Treatment of slags originating from iron or steel processes
    • C21B2400/05Apparatus features
    • C21B2400/052Apparatus features including rotating parts
    • C21B2400/054Disc-shaped or conical parts for cooling, dispersing or atomising of molten slag rotating along vertical axis
    • 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
    • C21B2400/074Tower structures for cooling, being confined but not sealed
    • 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
    • Y02P10/25Process 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

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Abstract

The utility model discloses a system for processing blast-furnace slag by a dry method and continuously adopting waste heat, and belongs to a blast-furnace slag processing and waste heat utilizing system in an iron-smelting industry. The system comprises a pelletizing heat exchanging unit and a waste heat utilizing unit, wherein the pelletizing heat exchanging unit at least comprises a pelletizing cooling device, a heat exchanging device and a waste heat boiler device; the pelletizing cooling device is communicated with the heat exchanging device; the heat exchanging device is communicated with the waste heat boiler device; and the waste heat boiler device is communicated with the waste heat utilizing unit. According to the system, the blast-furnace slag after being pelletized and primarily cooled is conveyed to the heat exchanging device by the pelletizing cooling device to carry out heat exchanging with air flow, the hot air flow after being subjected to the heat exchanging enters into the waste heat boiler device to generate vapors, and the vapors enter into the waste heat utilizing unit to do dynamic works. According to the system for processing the blast-furnace slag by the dry method and continuously adopting the waste heat, the high-efficient waste heat recycle of the high-temperature blast-furnace slag is realized, and the technical problem that the cooling velocity and the waste heat recycling effect are required to be both considered in a blast-furnace slag waste heat recycling technique in the dry method pelletizing processing is solved.

Description

A kind of blast-furnace slag dry process waste heat utilizes system continuously
Technical field
The utility model relates to a kind of iron industry blast-furnace slag to be processed and bootstrap system, and in particular, the utility model relates generally to a kind of blast-furnace slag dry process waste heat and utilizes continuously system.
Background technology
Blast-furnace slag is a kind of byproduct that blast furnace ironmaking produces, and is a kind of well behaved silicate material, through processing treatment, is mainly used in making the raw material of material of construction and chemical fertilizer.Simultaneously, in the blast furnace production process, enter various former, the fuel of stove after smelting, except obtaining molten iron (conversion pig or foundry iron) and byproduct blast furnace gas, gangue in the iron ore, ash content in the fuel and flux merge and just form liquid slag, and its general temperature is 1450~1650 ℃, regularly discharge from cinder notch, iron mouth.Usually will be called from the slag that cinder notch is discharged " upper slag ", from be called " the lower slag " of iron mouth in company with the molten iron discharge, often be mixed with a small amount of molten iron in the lower slag.The chemical ingredients of blast-furnace slag depends on that the working of a furnace in material composition, smelt iron kind, working method and the smelting process changes.Main component is CaO, MgO, SiO in the blast furnace slag 2And Al 2O 3, accounting for more than 95% of total amount, these four kinds of compositions can determine the metallurgical performance of blast furnace slag substantially.The Flos Bombacis Malabarici vanadium titano-magnetite contains more TiO 2, the packet header baiyuneboite contains more CaF 2, with these particular iron ore smeltings, corresponding TiO in the slag 2, CaF 2More.In addition, also containing a small amount of FeO, MnO and CaS and some minor compounds in the slag, O.9 its basicity be generally~and 1.25.When blast-furnace smelting normally carried out, slag composition changed little, but sometimes needs to adjust in process of production charge composition, this moment the slag composition respective change, the working of a furnace changes slag composition and also can change, Feo, SiO in the slag when stove is cold 2Content can slightly have and increases.1 ton of pig iron of every production is wanted by-product 300~400kg slag, and outflow temperature is at 1450~1650 ℃, and the 1t blast furnace slag contains the heat of 1800MJ approximately, amounts to the 64kg standard coal.The blase furnace cast iron output of China in 2011 is 6.3 hundred million t, and the generation of blast furnace slag is about 2.14 hundred million t, and institute's heat content is amounted to 1,370 ten thousand t standard coals.
At present, the liquid blast-furnace slag of China adopts water quenching to produce grain slag more than 90%, and the blast-furnace slag after the water-cooled can be used for making the material of construction such as cement, and water treating method commonly used has Yin Bafa, figure daraf(reciprocal of farad), Lhasa method etc.The method Main Problems has: water consumption is serious, processes 1 ton of slag water consumption per ton, and a large amount of H that produce 2S and SO XGas enters atmosphere with water vapor, causes environmental pollution.Process the 1t slag and produce 800m 3Water vapor, wherein H2S content 19mg/m 3, SO2 content 4.319mg/m 3The waste heat of slag is not effectively recycled; The grain slag water ratio is high simultaneously, still needs drying treatment as cement raw material, needs to consume certain energy; The investment of system and running cost are high, and the blast furnace of a daily output 2500t will be built two cover flush slag equipment, and generally about 4,000 ten thousand yuan, in the flush slag process, the slag that iron content is higher easily sets off an explosion in construction investment; And the grain slag purposes is more single.The H that produces 2S and SO XEnter atmosphere Deng obnoxious flavour with steam, promote the formation of acid rain, the accumulation of Water Quenching Slag has taken a large amount of land areas, even sand can occur, and aggravating working environment causes serious environmental pollution.Domestic blast furnace slag heat recovery only limits to the using exhaust heat of slag flushing water heating.There was the report that adopts using exhaust heat of slag flushing water to solve plant area's part heating or bathroom supplying hot water in the enterprises such as Shoudu Iron and Steel Co, Ji steel, Xuan Gang, Anshan iron and steel plant, this steel, Laigang, An Gang.But this utilization only accounts for the seldom part of blast furnace slag complete sensible heat, and the waste heat recovery rate is low, only is about 10%, and is subjected to time and regional limits, and in summer with without the southern area of warming installation, this part energy can only be wasted, and therefore applies being restricted.Shortcoming for the blast-furnace slag water quenching; 20 century 70s, the method for the dry granulation slag that begun one's study both at home and abroad mainly contains wind quench method and centrifugal granulation method; both first with liquid blast-furnace slag quick crashing, be solidified as small-particle, adopt again the method for technique means recovery waste heat.The wind method of quenching be with high-power granulation blower fan produce high pressure, high velocity air with slag dispel, the method for granulation, main drawback is that power consumption is large, equipment bulky complex, floor space are large, investment and working cost are high, and produces secondary dust and pollute.Centrifugal granulation is to rely on centrifugal force that the high speed rotating of rotating disk or revolving cup produces with liquid blast furnace slag granulation; have that the granulation energy consumption is low, the size distribution of grain slag is even; be easy to realize the characteristics such as sensible heat recovery; it is the hot research direction that current blast furnace slag is processed; it is theoretical many granulating to have occurred, and has obtained the part Experiment Result.But in the above-mentioned Treating Methods for BF Slag, the heat that enriches that blast furnace slag is contained also is not fully used, the report that does not also have the entity device industrial applications, the mature industry utilisation technology does not form, the main difficulty that exists has: the speed of cooling of (1) molten blast furnace slag requires high, and its speed of cooling requires greater than 10 ℃/s; (2) high furnace slag discharge has intermittence, and residual neat recovering system requires heat exchange to have continuity; (3) blast furnace slag forms the secondary caking phenomenon easily in process of cooling; (4) there is secondary pollution in the scheme device, dust pollution for example, groundwater pollution etc.
The utility model content
One of the purpose of this utility model is to solve above-mentioned deficiency; provide a kind of blast-furnace slag dry process waste heat to utilize continuously system; solve in the prior art still indeterminable dry granulation with expectation and process in the blast-furnace slag heat recovery technology, need take into account simultaneously the rate of cooling of granulated slag and the technical problem of waste heat recovery effect.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
It is that a kind of blast-furnace slag dry process waste heat utilizes system continuously that the utility model provides; comprise granulation heat exchange unit and UTILIZATION OF VESIDUAL HEAT IN unit in the described system; at least comprise the granulation refrigerating unit in the described granulation heat exchange unit; heat-exchanger rig and waste heat boiler device; wherein the granulation refrigerating unit is connected with heat-exchanger rig; and heat-exchanger rig is connected with waste heat boiler device; described waste heat boiler device is connected with the UTILIZATION OF VESIDUAL HEAT IN unit; the granulation refrigerating unit is delivered to granulation and preliminary cooled blast-furnace slag and carries out the air-flow heat exchange in the heat-exchanger rig; hot gas flow after the heat exchange enters and produces steam in the waste heat boiler device, and steam enters the acting that is used as power in the UTILIZATION OF VESIDUAL HEAT IN unit.
Further technical scheme is: described UTILIZATION OF VESIDUAL HEAT IN comprises steam turbine and generator in the unit at least, the output terminal of steam turbine is connected with generator, waste heat boiler device is connected with steam turbine by pipeline, and waste heat boiler device generates electricity delivery of steam to the steam turbine pushing turbine drive generator rotation of its generation.
Further technical scheme is: the slag particle entrance top of the granulation refrigerating unit in the described granulation heat exchange unit is provided with tundish device and excess flow slag chute, be provided with e Foerderanlage near the slag particle outlet, blast-furnace slag at first enters the excess flow slag chute and enters the tundish device again, by the tundish device blast-furnace slag is entered in the granulation refrigerating unit, the granulation refrigerating unit exports granulation and preliminary cooled blast-furnace slag in the heat-exchanger rig to by e Foerderanlage; Also be provided with exhanst gas outlet on the described granulation refrigerating unit; The inboard of described granulation refrigerating unit also is provided with one or more spiral of air nozzles; the spiral of air nozzle accesses air compression plant by air line; the spiral of air nozzle is used for forming spiral air flow at the granulation refrigerating unit, to accelerate the cooling of granulation blast-furnace slag.
Further technical scheme is: described heat-exchanger rig is that inside is cellular fluidized-bed; the bottom of fluidized-bed and top are respectively arranged with outlet and the entrance of blast-furnace slag; and its bottom is attached with blower fan; its top is connected with waste heat boiler device by pipeline; the granulation blast-furnace slag that is delivered in the heat-exchanger rig by the granulation refrigerating unit enters fluidized-bed inside by entrance; after heat exchange, discharged by the outlet of bottom, behind the heat that absorbs the granulation blast-furnace slag, become hot gas flow by the air-flow of blower fan manufacturing and entered in the waste heat boiler device by pipeline.
Further technical scheme is: the exhanst gas outlet that arranges on the described granulation refrigerating unit also is connected with waste heat boiler device by pipeline, and this pipeline coincides with the pipeline that is connected between heat-exchanger rig and the waste heat boiler device, and the flue gas in the granulation refrigerating unit and the hot gas flow in the fluidized-bed are successively or together enter in the waste heat boiler device.
Further technical scheme is: the pipeline between described granulation refrigerating unit and the waste heat boiler device, and being provided with cleaning apparatus on the pipeline between heat-exchanger rig and the waste heat boiler device, cleaning apparatus is used for filtering the dust of the air-flow that enters waste heat boiler device.
Further technical scheme is: comprise drum, economizer, vaporizer and superheater in the described waste heat boiler device, and also be provided with waste stack on the waste heat boiler device; Described economizer, vaporizer and superheater inside all are provided with the circulating line that is interconnected, and the circulating line of superheater inside is connected with the pipeline that waste heat boiler device is communicated with steam turbine; The circulating line of described economizer, vaporizer and superheater inside all respectively through and be communicated with drum, mobile vaporised liquid is arranged in the described circulating line, the hot gas flow that comes from the heat-exchanger rig enters superheater, vaporizer and economizer successively, is discharged by waste stack at last.
Further technical scheme is: described steam turbine also is connected by the circulating line in the economizer in another pipeline and the waste heat boiler device, enters steam after the steam turbine acting and flow in the economizer in the waste heat boiler device by back of pipeline and be recycled.
Further technical scheme is: be disposed with condenser, liquid de-aerator plant and service pump on the pipeline in described steam turbine and the waste heat boiler device between the economizer; The vaporised liquid that flows in the circulating line in described economizer, vaporizer and the superheater is deaerated water, and deaerated water is sent into circulating line in the economizer by service pump, and it is interior temporary to enter drum, and then enters successively the circulating line in superheater and the vaporizer.
Further technical scheme is: the economizer in described heat-exchanger rig, steam turbine and the waste heat boiler device, superheater and vaporizer form the heating power recovery system, after being come from deaerated water steam after the hot gas flow gasification in the heat-exchanger rig and in entering steam turbine, doing work, discharged by the pipeline between steam turbine and the economizer, after condensing into water through condenser again, by the de-aerator plant deoxygenation, at last send into circulating line in the economizer by service pump, circulate with this.
Compared with prior art; one of the beneficial effects of the utility model are: combine with heat-exchanger rig by the granulation refrigerating unit; the mode of segmentation cooling down high-temperature blast-furnace slag; make one section freezing air in the granulation refrigerating unit satisfy in the blast-furnace slag dry granulation technology requirement to the high speed of cooling of granulation slag particle; two sections freezing airs in the heat-exchanger rig satisfy the requirement that high quality reclaims heat in the hot gas flow; the introducing waste heat boiler device of the flue gas in the last granulation refrigerating unit and the while of the hot gas flow in the heat-exchanger rig or successively segmentation; realized the blast-furnace slag waste heat high efficiente callback utilization of high temperature; solve dry granulation and processed the technical barrier that blast-furnace slag heat recovery technology need be taken into account rate of cooling and the waste heat recovery effect of granulated slag; and blast-furnace slag also is easy to process more after the cooling of being discharged by heat-exchanger rig and the granulation; minimizing is to the pollution of environment; a kind of blast-furnace slag dry process waste heat provided by the utility model utilizes the system element modular division clear and definite continuously simultaneously; be easy to assembling; it is suitable for the various blast furnace founding of dry process slag, and range of application is wide.
Description of drawings
Fig. 1 is for being used for the system architecture synoptic diagram of a kind of embodiment of explanation the utility model;
Fig. 2 is for being used for system's station synoptic diagram of the another kind of embodiment of explanation the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further elaborated.
Fig. 1 shows the utility model system architecture overall condition; referring to shown in Figure 1; the first embodiment of the present utility model is that a kind of blast-furnace slag dry process waste heat utilizes system continuously; comprise granulation heat exchange unit 1 and UTILIZATION OF VESIDUAL HEAT IN unit 2 in the described system; and comprise granulation refrigerating unit 11, heat-exchanger rig 12 and waste heat boiler device 13 in the granulation heat exchange unit 1; wherein granulation refrigerating unit 11 is connected with heat-exchanger rig 12, and heat-exchanger rig 12 is connected with waste heat boiler device 13.Waste heat boiler device 13 is connected with UTILIZATION OF VESIDUAL HEAT IN unit 2; the effect of granulation refrigerating unit 11 is granulation and preliminary cooled blast-furnace slag to be delivered to carry out the air-flow heat exchange in the heat-exchanger rig 12; hot gas flow after the heat exchange enters in the waste heat boiler device 13 and produces steam, and the steam that produces then enters in the UTILIZATION OF VESIDUAL HEAT IN unit 2 and does work as power.The aforementioned steam of mentioning enters acting in the UTILIZATION OF VESIDUAL HEAT IN unit 2; can adopt realization way more common in this area; namely in UTILIZATION OF VESIDUAL HEAT IN unit 2, steam power plant is set; utilizing steam to drive steam power plant realizes generating or utilizes this power drive other machine equipment operation; therefore what the structure that is connected with UTILIZATION OF VESIDUAL HEAT IN unit 2 of above-mentioned waste heat boiler device 13 should be understood to that waste heat boiler device 13 is communicated with is steam power plant; certainly residual heat using device can also comprise other equipment for the operation of auxiliary steam power device; by aforesaid technical scheme; can be with blast-furnace slag granulation and cooling heat transferring; reclaim simultaneously the heat that heat exchange obtains and do work, so this technical scheme can be used as comparatively a kind of embodiment on basis of the utility model.
On the basis of above-described embodiment, the utility model is to improve for UTILIZATION OF VESIDUAL HEAT IN unit 2 in conjunction with the preferred embodiment of above-mentioned basic embodiment, adopt steam turbine 21 and generator 22 and auxiliary other installation composition UTILIZATION OF VESIDUAL HEAT IN unit 2 that their move, again as shown in Figure 1, the output terminal of steam turbine 21 is connected with generator 22, waste heat boiler device 13 is connected with steam turbine 21 by pipeline, and waste heat boiler device 13 rotates the delivery of steam of its generation and generates electricity to steam turbine 21 pushing turbines 21 drive generators 22, clearly, at the middle steam turbine 21 that adopted of present embodiment as the steam power plant in the above-mentioned UTILIZATION OF VESIDUAL HEAT IN unit 2, and because steam turbine has been a kind of steam power plant of development comparative maturity in the prior art, method and structural principle about its use can directly with reference to prior art, seldom be done detailed description herein.
Simultaneously; for guaranteeing that those of ordinary skill in the art implements the utility model and can obtain better technique effect; the contriver with it in the process of utility model experiment; think that the concrete ins and outs that comprise each device in above-mentioned granulation heat exchange unit 1 and the UTILIZATION OF VESIDUAL HEAT IN unit 2 are described below; any one following ins and outs combine with above-mentioned two embodiment, all can be configured to other embodiment that the utility model is better than these two kinds of embodiment:
With reference to shown in Figure 1, slag particle entrance 113 tops of the granulation refrigerating unit 11 in the above-mentioned granulation heat exchange unit 1 are provided with tundish device 111 and excess flow slag chute 112 again.And Fig. 2 shows system of the present utility model station orthographic plan, with reference to shown in Figure 2, the effect of excess flow slag chute 112 is when a plurality of tundish device 111 has been installed in system, after large batch of blast-furnace slag is transported by transportation tipper 4, when centre packing put 111 move to specified location after, blast-furnace slag flows into respectively a plurality of tundish devices 111 by excess flow slag chute 112 from transportation tipper 4, the effect of tundish device 111 then is the blast-furnace slag that temporary transient storage is entered by excess flow slag chute 112, a plurality of tundish devices 111 enter the blast-furnace slag of the storage of its inside the inside of granulation refrigerating unit successively, and can be by regulating the middle hopper 117 of its below, to guarantee the stable and continuous inside that enters granulation refrigerating unit 11 of blast-furnace slag.And being provided with e Foerderanlage 115 near the granulation refrigerating unit 11 slag particles outlet 114, the effect of e Foerderanlage 115 is that granulation refrigerating unit 11 granulations and preliminary cooled blast-furnace slag are exported in the heat-exchanger rig 12; Also be provided with exhanst gas outlet 116 on the described granulation refrigerating unit 11, the effect of exhanst gas outlet 116 is the high-temperature flue gas that produce when granulation refrigerating unit 11 internal cooling for discharging blast-furnace slag, and exhanst gas outlet 16 is connected with waste heat boiler device 13 devices by pipeline, exports the high temperature gas flow of discharging to waste heat boiler device 13 and utilizes.And be the cooling performance that further promotes 11 pairs of granulation blast-furnace slags of granulation refrigerating unit herein; prevent that the blast-furnace slag generation secondary after the granulation from boning; can be provided with in granulation refrigerating unit 11 inboards one or more spiral of air nozzle (not shown)s; the spiral of air nozzle is by air line access air compression plant (not shown); as aforementioned said; the effect of spiral of air nozzle is for forming spiral air flow at granulation refrigerating unit 11; to accelerate the rate of cooling of granulation blast-furnace slag in granulation refrigerating unit 11; and delay the speed that slag particle descends, can prevent that also slag particle from boning at the inwall of granulation refrigerating unit 11.
Technical scheme in conjunction with above-mentioned granulation refrigerating unit 11 concrete structures; enter in the heat-exchanger rig 12 owing to be transported to that after the blast-furnace slag after the granulation tentatively cools off in granulation refrigerating unit 11; and still very high in the slag particle temperature that enters in the heat-exchanger rig 12; and in heat-exchanger rig 12, need slag particle is carried out the secondary heat exchange cooling; therefore its inner structure needs better to adapt to this operation; the contriver thinks for the specific requirement of aforementioned secondary heat exchange; think that the structure of heat-exchanger rig 12 comparative optimizations is that its inside is set to be cellular fluidized-bed 124; the bottom of fluidized-bed 124 and top are respectively arranged with the outlet 121 and entrance 122 of blast-furnace slag; and its bottom is attached with gas blower 123; its top is connected with waste heat boiler device 13 by pipeline; enter fluidized-bed 124 inside by the slag particle that e Foerderanlage 115 is delivered in the heat-exchanger rig 12 by entrance 122 by granulation refrigerating unit 11; blast-furnace slag after heat exchange is discharged by the outlet 121 of bottom; and the effect of aforementioned gas blower 123 is to make air-flow, and air-flow becomes hot gas flow and entered in the waste heat boiler device 13 by pipeline behind the heat that absorbs the high temperature slag particle.
Be connected with waste heat boiler device 13 by pipeline at the above-mentioned exhanst gas outlet 116 of also mentioning 11 settings of granulation refrigerating unit; consider the simplification of pipeline in the volume of system and the granulation heat exchange unit 1 herein; furthermore; this pipeline is that essence is identical with heat-exchanger rig 12 with pipeline effect between the waste heat boiler device 13; therefore the pipeline that is connected between granulation refrigerating unit 11 and the waste heat boiler device 13 can be set coincide with the pipeline that is connected between heat-exchanger rig 12 and the waste heat boiler device 13; again with reference to shown in Figure 1; definite says; aforesaid two merge into a pipeline with pipeline is connected with waste heat boiler device 13, and the hot gas flow in the flue gas in the granulation refrigerating unit 11 and the fluidized-bed 124 is successively or together enters in the waste heat boiler device 13.
Simultaneously for controlling the dust content in the hot gas flow that enters in the waste heat boiler device 13, prevent from resulting in blockage after too many dust from entering waste heat boiler device 13 inside, being preferably in above-mentioned granulation refrigerating unit 11, heat-exchanger rig 12 and waste heat boiler device 13 merges on one the pipeline cleaning apparatus 14 is set, effect as aforementioned said cleaning apparatus 14 is the dust that enters the air-flow of waste heat boiler device 13 for filtration, on the specification of fly-ash separator 14, what adopt when the contriver tests is tornado dust collector.
Refer again to shown in Figure 1, and for the waste heat boiler device 13 of repeatedly mentioning in the above-mentioned technology contents, the contriver is on the structure of traditional waste heat boiler, also done following improvement, drum 131, economizer 132, vaporizer 133 and superheater 134 namely are set in waste heat boiler device 13, and also are provided with the waste stack (not shown) on the waste heat boiler device 13; Described economizer 132, vaporizer 133 all are provided with the circulating line 135 that is interconnected with superheater 134 inside, and the circulating line 135 of superheater 134 inside is connected with the pipeline that waste heat boiler device 13 is communicated with steam turbine 21.The circulating line 135 of described economizer 132, vaporizer 133 and superheater 134 inside all respectively through and be communicated with drum 131, in the described circulating line 135 mobile vaporised liquid is arranged, the hot gas flow that comes from the heat-exchanger rig 12 enters superheater 134, vaporizer 133 and economizer 132 successively, is discharged by waste stack at last.
And the utility model is on above-mentioned various embodiment basis; for strengthening the degree of contact between UTILIZATION OF VESIDUAL HEAT IN unit 2 and the granulation heat exchange unit 1; also done improvement for aforesaid technical scheme; it is specially steam turbine 21 is connected by the circulating line 135 in the economizer 132 in another pipeline and the waste heat boiler device 13, enters steam after steam turbine 21 actings and flow in the economizer 132 in the waste heat boiler device 13 by back of pipeline and be recycled.By aforesaid technical scheme also can so that the vaporize water major part in the waste heat boiler device 13 all can be recycled, consumption greatly reduces, and be the smooth enforcement that cooperates this technique means, and the oxygen level in the control vaporize water, the technique means that is more preferably is that the pipeline between the economizer 132 sets gradually condenser 23, liquid de-aerator plant 24 and service pump 25 in steam turbine 21 and waste heat boiler device 13, and the setting position of these part parts can be referring to shown in Figure 1.Condenser 23, liquid de-aerator plant 24 and service pump 25 namely can be used as other devices of the auxiliary turbine 21 mentioned in above-described embodiment and generator 22 operations.Because the liquid de-aerator plant 24 between steam turbine 21 and waste heat boiler device 13 exists, so that economizer 132, circulating line 135 interior mobile vaporised liquids are deaerated water in vaporizer 133 and the superheater 134, and the effect of service pump 25 is that deaerated water is sent into circulating line 135 in the economizer 132, and the power that provides deaerated water in circulating line 135 and pipeline, to flow, it is interior temporary that deaerated water enters drum 131 by circulating line, and then entering successively circulating line 135 in superheater 134 and the vaporizer 133, the circulating line 135 that is evaporated to behind the steam by superheater 134 inside enters in the steam turbine 21 through piping.
Again with reference to shown in Figure 1, according to two pipelines between above-mentioned steam turbine 21 and the waste heat boiler device 13, cooperate with high temperature hot gas flow transmission between the waste heat boiler device 13 with heat-exchanger rig 13, so that the heat-exchanger rig 12 of mentioning in above-described embodiment, economizer 132 in steam turbine 21 and the waste heat boiler device 13, superheater 134 and vaporizer 133 have formed heating power recovery system 3, under the thermodynamic activity of the high temperature hot gas stream of deaerated water in coming from heat-exchanger rig 12, in circulating line 135, be vaporized, after the form of water vapor enters and does work in the steam turbine 21 later on, discharged by the pipeline between steam turbine 21 and the economizer 132, after condensing into water through condenser 23 again, by de-aerator plant 24 deoxygenations, at last send into circulating line 135 in the economizer 132 by service pump 25, circulate with this.
By the described above-described embodiment of the utility model, also need to prove, " embodiment " who speaks of in this manual, " another embodiment ", " embodiment ", etc., refer to specific features, structure or the characteristics described in conjunction with this embodiment and be included among at least one embodiment that the application's generality describes.A plurality of local appearance statement of the same race is not necessarily to refer to same embodiment in specification sheets.Furthermore, when describing a specific features, structure or characteristics in conjunction with arbitrary embodiment, what advocate is to realize that in conjunction with other embodiment this feature, structure or characteristics also drop in the scope of the present utility model.
Although with reference to a plurality of explanatory embodiment of the present utility model the utility model is described here, but, should be appreciated that, those skilled in the art can design a lot of other modification and embodiments, and these are revised and embodiment will drop within the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to building block and/or the layout of subject combination layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes also will be obvious.

Claims (10)

1. a blast-furnace slag dry process waste heat utilizes system continuously; comprise granulation heat exchange unit (1) and UTILIZATION OF VESIDUAL HEAT IN unit (2) in the described system; it is characterized in that: comprise at least granulation refrigerating unit (11), heat-exchanger rig (12) and waste heat boiler device (13) in the described granulation heat exchange unit (1); wherein granulation refrigerating unit (11) is connected with heat-exchanger rig (12); and heat-exchanger rig (12) is connected with waste heat boiler device (13), and described waste heat boiler device (13) is connected with UTILIZATION OF VESIDUAL HEAT IN unit (2).
2. blast-furnace slag dry process waste heat according to claim 1 utilizes system continuously, it is characterized in that: comprise at least steam turbine (21) and generator (22) in the described UTILIZATION OF VESIDUAL HEAT IN unit (2), the output terminal of steam turbine (21) is connected with generator (22), and waste heat boiler device (13) is connected with steam turbine (21) by pipeline.
3. blast-furnace slag dry process waste heat according to claim 1 utilizes system continuously, it is characterized in that: slag particle entrance (113) top of the granulation refrigerating unit (11) in the described granulation heat exchange unit (1) is provided with tundish device (111) and excess flow slag chute (112), be provided with e Foerderanlage (115) near its slag particle outlet (114), blast-furnace slag at first enters excess flow slag chute (112) and enters tundish device (111) again, by tundish device (111) blast-furnace slag is entered in the granulation refrigerating unit (11), granulation refrigerating unit (11) exports granulation and preliminary cooled blast-furnace slag in the heat-exchanger rig (12) to by e Foerderanlage (115); Also be provided with exhanst gas outlet (116) on the described granulation refrigerating unit (11); The inboard of described granulation refrigerating unit (11) also is provided with one or more spiral of air nozzles, and the spiral of air nozzle accesses air compression plant by air line.
4. blast-furnace slag dry process waste heat according to claim 3 utilizes system continuously, it is characterized in that: described heat-exchanger rig (12) is cellular fluidized-bed for inside, the bottom of fluidized-bed and top are respectively arranged with the outlet (121) and entrance (122) of blast-furnace slag, and its bottom is attached with gas blower (123), and its top is connected with waste heat boiler device (13) by pipeline.
5. blast-furnace slag dry process waste heat according to claim 4 utilizes system continuously, it is characterized in that: the upper exhanst gas outlet (116) that arranges of described granulation refrigerating unit (11) also is connected with waste heat boiler device (13) by pipeline, and this pipeline coincides with the pipeline that is connected between heat-exchanger rig (12) and the waste heat boiler device (13).
6. blast-furnace slag dry process waste heat according to claim 5 utilizes system continuously, it is characterized in that: the pipeline between described granulation refrigerating unit (11) and the waste heat boiler device (13), and be provided with cleaning apparatus (14) on the pipeline between heat-exchanger rig (12) and the waste heat boiler device (13).
7. blast-furnace slag dry process waste heat according to claim 2 utilizes system continuously, it is characterized in that: comprise drum (131), economizer (132), vaporizer (133) and superheater (134) in the described waste heat boiler device (13), and also be provided with waste stack on the waste heat boiler device (13); Described economizer (132), vaporizer (133) all are provided with the circulating line (135) that is interconnected with superheater (134) inside, and the inner circulating line (135) of superheater (134) is connected with the pipeline that waste heat boiler device (13) is communicated with steam turbine (21); The inner circulating line (135) of described economizer (132), vaporizer (133) and superheater (134) all respectively through and be communicated with drum (131).
8. blast-furnace slag dry process waste heat according to claim 7 utilizes system continuously, it is characterized in that: described steam turbine (21) also is connected by the circulating line (135) in the middle economizer (132) of another pipeline and waste heat boiler device (13).
9. blast-furnace slag dry process waste heat according to claim 8 utilizes system continuously, it is characterized in that: be disposed with condenser (23), liquid de-aerator plant (24) and service pump (25) on the pipeline in described steam turbine (21) and the waste heat boiler device (13) between the economizer (132); Described economizer (132), vaporizer (133) are deaerated water with the interior vaporised liquid that flows of the middle circulating line (135) of superheater (134).
10. blast-furnace slag dry process waste heat according to claim 9 utilizes system continuously, it is characterized in that: the economizer (132) in described heat-exchanger rig (12), steam turbine (21) and the waste heat boiler device (13), superheater (134) and vaporizer (133) form the heating power recovery system.
CN2012202527097U 2012-05-31 2012-05-31 System for processing blast-furnace slag by dry method and continuously adopting waste heat Withdrawn - After Issue CN202658165U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102690910A (en) * 2012-05-31 2012-09-26 四川川润股份有限公司 Dry-method treatment and waste heat continuous utilization system for blast-furnace slag
CN103088209A (en) * 2013-03-01 2013-05-08 中南大学 Floating and smelting combined method for air-granulating lead smelting slag and utilizing waste heat
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
CN106989608A (en) * 2017-04-18 2017-07-28 南京工业大学 A kind of metallurgical liquid slag residual neat recovering system of hot blast dynamical type granulation and method
CN115141901A (en) * 2022-06-02 2022-10-04 中节能工业节能有限公司 Slag recovery system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102690910A (en) * 2012-05-31 2012-09-26 四川川润股份有限公司 Dry-method treatment and waste heat continuous utilization system for blast-furnace slag
CN103088209A (en) * 2013-03-01 2013-05-08 中南大学 Floating and smelting combined method for air-granulating lead smelting slag and utilizing waste heat
CN103088209B (en) * 2013-03-01 2014-08-27 中南大学 Floating and smelting combined method for air-granulating lead smelting slag and utilizing waste heat
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
CN106989608A (en) * 2017-04-18 2017-07-28 南京工业大学 A kind of metallurgical liquid slag residual neat recovering system of hot blast dynamical type granulation and method
CN106989608B (en) * 2017-04-18 2023-04-28 南京工业大学 Hot air power type granulating metallurgical liquid slag waste heat recovery system and method
CN115141901A (en) * 2022-06-02 2022-10-04 中节能工业节能有限公司 Slag recovery system
CN115141901B (en) * 2022-06-02 2024-02-20 中节能工业节能有限公司 Slag recovery system

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