CN102228774A - Method and device for sensible heat reclaiming of blast furnace slag and desulfurization of sintering flue gas - Google Patents
Method and device for sensible heat reclaiming of blast furnace slag and desulfurization of sintering flue gas Download PDFInfo
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- CN102228774A CN102228774A CN201110140832XA CN201110140832A CN102228774A CN 102228774 A CN102228774 A CN 102228774A CN 201110140832X A CN201110140832X A CN 201110140832XA CN 201110140832 A CN201110140832 A CN 201110140832A CN 102228774 A CN102228774 A CN 102228774A
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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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- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention relates to a method and a device for sensible heat reclaiming of blast furnace slag and desulfurization of sintering flue gas, which is characterized by that: by introducing sintering flue gas to the technology process of sensible heat reclaiming of blast furnace slag, the environmental pollution of the sintering flue gas is reduced, and the processed blast furnace slag and desulphurization by-products are used for producing cement and gypsum respectively. The device comprises a granulation reactor, a vibration bed, a cooling pond, an exhaust-heat boiler, a generator and a filter No.1, wherein, the feed inlet of the granulation reactor is connected with the slag runner of the blast furnace, and the granulation reactor is connected with the vibration bed and cooling pond in order. Compared with the prior art, the invention has the beneficial effects that: according to a theory of using waste treat waste, by the three processes of desulphurization, sensible heat reclaiming and energy conversion, the purpose of using waste heat steam to generating power and removing SO2 from the sintering flue gas at the same time is realized, the prepared blast furnace slag and desulphurization by-products can be used for producing cement and gypsum respectively, the sensible heat of blast furnace slag is recovered effectively, and the sulfide is removed from sintering flue gas. The invention has a great social meaning.
Description
Technical field
The present invention relates to processing of sulfur-bearing pernicious gas and energy recovery and utilize the field, relate in particular to a kind of blast-furnace cement sensible heat and reclaim method and the device that carries out sintering flue gas desulfurization simultaneously.
Background technology
At present, the SO that produces in the steel industry production process
2Total amount accounts for more than 11% of national total emission volumn, is only second to electric power enterprise, is positioned at the whole nation the second, and its discharge capacity is greatly about 1,500,000 t/a～1,800,000 t/a, wherein the sintering SO that (containing pelletizing), operation effluxed
2Account for about 85%～90% of total amount in the production process.By in by the end of May, 2009, China has built up sintered flue gas desulfurization device 35 covers, and 40 of the sintering machines of realization desulfurization form sintering desulfuration ability 8.2 ten thousand t.The sintering flue gas desulfurization technology that adopts mainly contains lime-gypsum method, ammonia-ammonia sulfate method, dense flow absorber method, recirculating fluidized bed method and activated carbon method at present, but ubiquity equipment operating cost is high and the expensive shortcoming of desulfurizing agent.
Molten blast furnace slag is the byproduct of blast furnace ironmaking, and its discharge temperature is 1400～1600 ℃, and heat content is about standard coal 60Kg/t (slag).China produced 5.43 hundred million tons of the pig iron in 2009, produced 0.35 ton of slag by iron per ton and calculated, and the quantum of output of blast furnace slag is 1.9 hundred million tons.But it is handled and adopts water quenching mostly at present, and the shortcoming of this method is: not only the sensible heat of blast furnace slag can't utilize, and causes a large amount of wastes of water resource, and atmosphere, water and soil earth have also been caused serious pollution, aggravating working environment.
Summary of the invention
The purpose of this invention is to provide a kind of blast-furnace cement sensible heat and reclaim method and the device that carries out sintering flue gas desulfurization simultaneously, overcome the deficiencies in the prior art, sinter fume is introduced in the technological process of blast-furnace cement sensible heat recovery, reduce the pollution of sinter fume to environment, blast furnace slag after the processing and desulfurization product are made cement and gypsum respectively.
For solving the problems of the technologies described above, technical scheme of the present invention is:
Blast-furnace cement sensible heat reclaims the method for carrying out sintering flue gas desulfurization simultaneously; molten blast furnace slag carries out first desulphurization reaction and exchange heat for the first time with the sinter fume of sintering waste heat boiler after the fragmentation of granulation reactor; and then carry out the secondary desulphurization reaction and heat reclaims for the second time through vibrated bed; in cooling bay, carry out at last the recovery for the third time of heat; the heat energy that reclaims utilizes with the form of generating again; blast furnace slag and desulfurization product are used for making cement and gypsum respectively, and the step of its realization is as follows:
1) temperature reaches 1400～1450 ℃ molten blast furnace slag and flows into the granulation reactor through slag runner; be to be broken into the drop that diameter is 1～5mm under 1800～2000 rev/mins the centrifugal action at rotating speed; 140～150 ℃ of sinter fumes that the sintering waste heat boiler is discharged blast in the granulation reactor and finish exchange heat for the first time with the high temperature drop simultaneously; the blast furnace slag particle temperature is reduced to 800 ℃～850 ℃, the SO in the sinter fume
2Fully contact with alkaline components CaO in the high temperature drop and to carry out first desulphurization reaction and generate desulfurization product CaSO
4
2) under the effect of gravity and exciting force, above-mentioned high temperature blast furnace slag particle and desulfurization product flow down and carry out the exchange heat second time with upstream sinter fume along vibrated bed, the blast furnace slag particle temperature is reduced to 200 ℃～210 ℃, and carries out desulphurization reaction generation second time desulfurization product CaSO
4
3) above-mentioned blast furnace slag particle and desulfurization reaction product enter cooling bay and water is finished exchange heat for the third time, and the cooling bay water temperature is promoted to 70 ℃～80 ℃;
4) solidliquid mixture in the cooling bay enters filter one, be used to make cement after the isolated graininess blast furnace slag drying device drying, isolated pulpous state gypsum, through the concentrated gypsum baffle-box that enters in cyclone separator dehydration back, be pressed into moisture 10% solid-state gypsum again through vacuum belt press filter dehydration, send waste heat boiler to produce steam after the water that cyclone separator is taken off purifies through filter two and be used for generating;
5) the desulfurization flue gas through granulation reactor and vibrated bed heat exchange desulfurization is warming up to 500～550 ℃, enters waste heat boiler through deduster and produces 1.0MPa, 194 ℃ steam, and steam imports generator for electricity generation, and heat energy is converted into electric energy so that store and utilize.
Blast-furnace cement sensible heat reclaims the device that carries out sintering flue gas desulfurization simultaneously, comprise the granulation reactor, vibrated bed, cooling bay, waste heat boiler, generator and filter one, granulation reactor feed mouth is connected with the slag runner of blast furnace, the granulation reactor successively with vibrated bed, cooling bay is connected, air-introduced machine is respectively by pipeline and granulation reactor bottom, the vibrated bed afterbody is connected, the exhaust opening of granulation reactor successively with deduster, waste heat boiler, chimney is connected, be provided with filter two and back water pump between waste heat boiler water inlet and the cyclone separator, the waste heat boiler steam pipe is connected with generator;
Described cooling bay links to each other with filter one, and filter one is connected with drier, cyclone separator respectively, and cyclone separator is connected with vacuum belt press filter with the gypsum baffle-box successively.
Described vibrated bed bottom is provided with vibrator.
Compared with prior art, the invention has the beneficial effects as follows: according to the theory of " treatment of wastes with processes of wastes against one another ", reclaim and three processes of power conversion, remove SO in the sinter fume when having realized the afterheat steam generating by desulfurization, sensible heat
2Purpose, blast furnace slag that obtains and desulfurization product can be made cement and gypsum respectively, have both reclaimed blast-furnace cement sensible heat effectively, have removed the sulfide in the sinter fume again, energy-saving and emission-reduction and control are polluted have great social effect.
Description of drawings
Fig. 1 is an embodiment of the invention flowage structure schematic diagram.
Among the figure: 1-sintering waste heat boiler 2-air-introduced machine 3-blast furnace 4-slag runner 5-fume pipe one 6-fume pipe two 7-vibrator 8-granulation reactor 9-deduster 10-chimney 11-vibrated bed 12-cooling bay 13-drier 14-filters one 15-cyclone separator 16-filter two 17-back water pump 18-waste heat boiler 19-generator 20-gypsum baffle-box 21-vacuum belt press filters
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
See Fig. 1; be that blast-furnace cement sensible heat of the present invention reclaims the method embodiment flowage structure schematic diagram that carries out sintering flue gas desulfurization simultaneously; molten blast furnace slag through the sinter fume of the broken back of granulation reactor 8 and sintering waste heat boiler 1 carry out first desulphurization reaction and the first time exchange heat; and then carry out the secondary desulphurization reaction and heat reclaims for the second time through vibrated bed 11; in cooling bay 12, carry out at last the recovery for the third time of heat; the heat energy that reclaims utilizes with the form of generating again; blast furnace slag and desulfurization product are used for making cement and gypsum respectively, and the step of its realization is as follows:
1) temperature reaches 1400～1450 ℃ molten blast furnace slag and flows into granulation reactors 8 through slag runner 4; be to be broken into the drop that diameter is 1～5mm under 1800～2000 rev/mins the centrifugal action at rotating speed; the sinter fume that sintering waste heat boiler 1 is discharged 140～150 ℃ blasts in the granulation reactor 8 and finishes exchange heat for the first time with the high temperature drop simultaneously; the blast furnace slag particle temperature is reduced to 800 ℃～850 ℃, the SO in the sinter fume
2Fully contact with alkaline components CaO in the high temperature drop and to carry out first desulphurization reaction and generate desulfurization product CaSO
4
2) under the effect of gravity and exciting force, above-mentioned high temperature blast furnace slag particle and desulfurization product flow down and carry out the exchange heat second time with upstream sinter fume along vibrated bed 11, the blast furnace slag particle temperature is reduced to 200 ℃～210 ℃, and carries out desulphurization reaction generation second time desulfurization product CaSO
4, twice pair of sinter fume carries out desulfurization, greatly reduced the harmful components in the flue gas;
3) above-mentioned blast furnace slag particle and desulfurization reaction product enter cooling bay 12 and finish exchange heat for the third time with water, and the cooling bay water temperature is promoted to 70 ℃～80 ℃;
4) solidliquid mixture in the cooling bay 12 enters filter 1, deliver to the cement plant after isolated graininess blast furnace slag drying device 13 dryings and be used to make cement, isolated pulpous state gypsum, after cyclone separator 15 dehydrations, concentrate and enter in the gypsum baffle-box 20, be pressed into the solid-state gypsum of moisture 10% (purity can reach more than 90%) again through vacuum belt press filter 21 dehydrations, be provided with filter 2 16 and back water pump 17 between waste heat boiler 18 water inlets and the cyclone separator 15;
5) the desulfurization flue gas through granulation reactor 8 and vibrated bed 11 heat exchange desulfurization is warming up to 500～550 ℃, enters waste heat boiler 18 through deduster 9 and produces 1.0MPa, 194 ℃ steam, and steam imports generator 19 generatings, and heat energy is converted into electric energy so that store and utilize.
This blast-furnace cement sensible heat reclaims the device that carries out sintering flue gas desulfurization simultaneously, comprise granulation reactor 8, vibrated bed 11, cooling bay 12, waste heat boiler 18, generator 19 and filter 1, granulation reactor 8 charging apertures are connected with the slag runner 4 of blast furnace 3, granulation reactor 8 successively with vibrated bed 11, cooling bay 12 is connected, sintering waste heat boiler 1 passes through fume pipe 1 and fume pipe 26 and granulation reactor 8 bottoms respectively through air-introduced machine 2, vibrated bed 11 afterbodys are connected, the exhaust opening of granulation reactor 8 successively with deduster 9, waste heat boiler 18, chimney 10 is connected, be provided with filter 2 16 and back water pump 17 between waste heat boiler 18 water inlets and the cyclone separator 15, waste heat boiler 18 steam pipes are connected with generator 19; Cooling bay 12 links to each other with filter 1, and filter 1 is connected with drier 13, cyclone separator 15 respectively, and cyclone separator 15 is connected with vacuum belt press filter 21 with gypsum baffle-box 20 successively.Vibrated bed 11 bottoms are provided with vibrator 7.Granulation reactor 8 utilizes centrifugal force to carry out the fragmentation of slag dry type, and the conserve water consumption reduces pollutant emission.
Claims (3)
1. blast-furnace cement sensible heat reclaims the method for carrying out sintering flue gas desulfurization simultaneously; it is characterized in that; molten blast furnace slag carries out first desulphurization reaction and exchange heat for the first time with the sinter fume of sintering waste heat boiler after the fragmentation of granulation reactor; and then carry out the secondary desulphurization reaction and heat reclaims for the second time through vibrated bed; in cooling bay, carry out at last the recovery for the third time of heat; the heat energy that reclaims utilizes with the form of generating again; blast furnace slag and desulfurization product are used for making cement and gypsum respectively, and the step of its realization is as follows:
1) temperature reaches 1400～1450 ℃ molten blast furnace slag and flows into the granulation reactor through slag runner; be to be broken into the drop that diameter is 1～5mm under 1800～2000 rev/mins the centrifugal action at rotating speed; 140～150 ℃ of sinter fumes that the sintering waste heat boiler is discharged blast in the granulation reactor and finish exchange heat for the first time with the high temperature drop simultaneously; the blast furnace slag particle temperature is reduced to 800 ℃～850 ℃, the SO in the sinter fume
2Fully contact with alkaline components CaO in the high temperature drop and to carry out first desulphurization reaction and generate desulfurization product CaSO
4
2) under the effect of gravity and exciting force, above-mentioned high temperature blast furnace slag particle and desulfurization product flow down and carry out the exchange heat second time with upstream sinter fume along vibrated bed, the blast furnace slag particle temperature is reduced to 200 ℃～210 ℃, and carries out desulphurization reaction generation second time desulfurization product CaSO
4
3) above-mentioned blast furnace slag particle and desulfurization reaction product enter cooling bay and water is finished exchange heat for the third time, and the cooling bay water temperature is promoted to 70 ℃～80 ℃;
4) solidliquid mixture in the cooling bay enters filter one, be used to make cement after the isolated graininess blast furnace slag drying device drying, isolated pulpous state gypsum, through the concentrated gypsum baffle-box that enters in cyclone separator dehydration back, be pressed into moisture 10% solid-state gypsum again through vacuum belt press filter dehydration, send waste heat boiler to produce steam after the water that cyclone separator is taken off purifies through filter two and be used for generating;
5) the desulfurization flue gas through granulation reactor and vibrated bed heat exchange desulfurization is warming up to 500～550 ℃, enters waste heat boiler through deduster and produces 1.0MPa, 194 ℃ steam, and steam imports generator for electricity generation, and heat energy is converted into electric energy so that store and utilize.
2. blast-furnace cement sensible heat reclaims the device that carries out sintering flue gas desulfurization simultaneously, it is characterized in that, comprise the granulation reactor, vibrated bed, cooling bay, waste heat boiler, generator and filter one, granulation reactor feed mouth is connected with the slag runner of blast furnace, the granulation reactor successively with vibrated bed, cooling bay is connected, air-introduced machine is respectively by pipeline and granulation reactor bottom, the vibrated bed afterbody is connected, the exhaust opening of granulation reactor successively with deduster, waste heat boiler, chimney is connected, be provided with filter two and back water pump between waste heat boiler water inlet and the cyclone separator, the waste heat boiler steam pipe is connected with generator;
Described cooling bay links to each other with filter one, and filter one is connected with drier, cyclone separator respectively, and cyclone separator is connected with vacuum belt press filter with the gypsum baffle-box successively.
3. blast-furnace cement sensible heat according to claim 2 reclaims the device that carries out sintering flue gas desulfurization simultaneously, it is characterized in that, described vibrated bed bottom is provided with vibrator.
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Cited By (12)
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| CN102605116A (en) * | 2012-04-09 | 2012-07-25 | 刘犇 | Blast furnace slag sensible heat recovery and generating method |
| CN102766706A (en) * | 2012-07-17 | 2012-11-07 | 北京科技大学 | Coal gasification system for waste heat of blast furnace slag |
| CN103787277A (en) * | 2014-01-15 | 2014-05-14 | 中钢集团鞍山热能研究院有限公司 | Method and device for producing synthesis gas through methane reforming with blast furnace slag sensible heat |
| CN104988264A (en) * | 2015-05-28 | 2015-10-21 | 北京科技大学 | Treatment and utilization method for sintering flue gas |
| CN105688667A (en) * | 2016-01-22 | 2016-06-22 | 钢研晟华工程技术有限公司 | Method for carrying out denitration on sintering flue gas by utilizing sensible heat of blast furnace slag |
| CN106582268A (en) * | 2016-11-15 | 2017-04-26 | 北京科技大学 | Flue gas multi-pollutant collaborative purification process using blast furnace slag sensible heat |
| CN106636500A (en) * | 2016-12-27 | 2017-05-10 | 中钢集团鞍山热能研究院有限公司 | Method and device for treating coking sewage by using blast furnace slag |
| CN106823774A (en) * | 2017-02-14 | 2017-06-13 | 河钢股份有限公司 | A kind of utilization blast furnace slag fixes carbon dioxide and the apparatus and method for reclaiming sensible heat |
| CN107281932A (en) * | 2017-08-11 | 2017-10-24 | 钢研晟华科技股份有限公司 | The process of denitrating flue gas is sintered using slag sensible heat and active ingredient |
| CN108302953A (en) * | 2018-03-27 | 2018-07-20 | 中山大学 | A kind of industrial high temperature solid granule residual neat recovering system and method |
| CN110240431A (en) * | 2019-07-24 | 2019-09-17 | 山东永正水泥有限公司 | Mineral slag and desulfurized method and its application in production slag powders |
| CN108302953B (en) * | 2018-03-27 | 2024-04-30 | 中山大学 | Industrial high-temperature solid bulk waste heat recovery system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605116B (en) * | 2012-04-09 | 2013-11-13 | 刘犇 | Blast furnace slag sensible heat recovery and generating method |
| CN102605116A (en) * | 2012-04-09 | 2012-07-25 | 刘犇 | Blast furnace slag sensible heat recovery and generating method |
| CN102766706A (en) * | 2012-07-17 | 2012-11-07 | 北京科技大学 | Coal gasification system for waste heat of blast furnace slag |
| CN102766706B (en) * | 2012-07-17 | 2014-05-07 | 北京科技大学 | Coal gasification system for waste heat of blast furnace slag |
| CN103787277A (en) * | 2014-01-15 | 2014-05-14 | 中钢集团鞍山热能研究院有限公司 | Method and device for producing synthesis gas through methane reforming with blast furnace slag sensible heat |
| CN103787277B (en) * | 2014-01-15 | 2015-09-30 | 中钢集团鞍山热能研究院有限公司 | A kind of utilize blast-furnace cement sensible heat to carry out reforming of methane on Ni-Ce method and device |
| CN104988264B (en) * | 2015-05-28 | 2017-07-18 | 北京科技大学 | A kind of method for sintering fume treatment and utilizing |
| CN104988264A (en) * | 2015-05-28 | 2015-10-21 | 北京科技大学 | Treatment and utilization method for sintering flue gas |
| CN105688667A (en) * | 2016-01-22 | 2016-06-22 | 钢研晟华工程技术有限公司 | Method for carrying out denitration on sintering flue gas by utilizing sensible heat of blast furnace slag |
| CN106582268A (en) * | 2016-11-15 | 2017-04-26 | 北京科技大学 | Flue gas multi-pollutant collaborative purification process using blast furnace slag sensible heat |
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| CN106823774A (en) * | 2017-02-14 | 2017-06-13 | 河钢股份有限公司 | A kind of utilization blast furnace slag fixes carbon dioxide and the apparatus and method for reclaiming sensible heat |
| CN106823774B (en) * | 2017-02-14 | 2023-03-21 | 河钢股份有限公司 | Device and method for fixing carbon dioxide and recovering sensible heat by using blast furnace slag |
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| CN108302953B (en) * | 2018-03-27 | 2024-04-30 | 中山大学 | Industrial high-temperature solid bulk waste heat recovery system and method |
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