CN103396823B - Method for preparing biomass oil by using waste heat of granulated blast furnace slag - Google Patents
Method for preparing biomass oil by using waste heat of granulated blast furnace slag Download PDFInfo
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- CN103396823B CN103396823B CN201310349224.9A CN201310349224A CN103396823B CN 103396823 B CN103396823 B CN 103396823B CN 201310349224 A CN201310349224 A CN 201310349224A CN 103396823 B CN103396823 B CN 103396823B
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- 239000002893 slag Substances 0.000 title claims abstract description 55
- 239000002028 Biomass Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000002918 waste heat Substances 0.000 title claims abstract description 16
- 239000002245 particle Substances 0.000 claims description 47
- 239000012075 bio-oil Substances 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000197 pyrolysis Methods 0.000 claims description 12
- 239000000571 coke Substances 0.000 claims description 9
- 239000008187 granular material Substances 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 230000007017 scission Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000003776 cleavage reaction Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000007710 freezing Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 2
- 235000011613 Pinus brutia Nutrition 0.000 claims description 2
- 241000018646 Pinus brutia Species 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000002309 gasification Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000000446 fuel Substances 0.000 abstract description 5
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical group [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 238000005469 granulation Methods 0.000 description 5
- 230000003179 granulation Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000019634 flavors Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010504 bond cleavage reaction Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000007908 dry granulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001722 flash pyrolysis Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a device and a method for preparing biomass oil by using waste heat of blast furnace granulated slag. The technical scheme of the invention furthest utilizes a large amount of waste heat rich in the high-temperature granulated slag to prepare the biomass oil, provides free energy for the production of the biomass energy, can provide sufficient heat energy, reduces the production cost of biomass liquefaction by recycling the waste heat, solves the main bottleneck restricting the industrial production of the biomass energy at present, and effectively solves the difficult problem restricting the industrialization of the biomass fuel, namely the overhigh production cost of the biomass fuel.
Description
Technical field
The invention belongs to and produce bio-oil field, be specifically related to a kind of method utilizing granulated blast-furnace slag waste heat to produce bio-oil.
Background technology
Traditional biomass pyrolysis for liquid production technique, needs to provide energy to make biological particles be reached the high temperature of pyrolysis needs at short notice by lesser temps using electrically heated as thermal source, and meanwhile, the drying of biomass material, cooling also need to consume certain energy.Research shows, often produces 1kg bio-oil (calorific value is about 5000kcal/kg), need consume the heat of about 600kcal.According to conventional energy resources as mineral substance fuel, electric energy etc., then add the production cost of biomass energy, cause new pollution simultaneously.In biomass energy production process, consume energy excessive, production cost is high, is the Main Bottleneck of restriction biomass energy suitability for industrialized production and application.
Metallurgical production energy consumption accounts for more than 20% of Chinese national economy total energy consumption.The byproduct blast furnace slag produced for iron-making production, often produces the blast furnace slag that 1 ton of pig iron wants by-product 0.3 ~ 0.6 ton about 1350 DEG C, about containing 7 × 10
5the sensible heat of kJ.All adopt at present both at home and abroad flush slag technique to reclaim slag, the waste of this mode not only a large amount of thermal resource and water resources, flush slag art production process also can produce SO
2and H
2the obnoxious flavoures such as S, cause environmental pollution.
Utilize granulated blast-furnace slag waste heat to produce biomass liquid fuel by pyrolytic technique, melt ward off an effective way for the utilization of China's blast furnace slag waste heat and acceleration realize bio-energy industry.
Summary of the invention
A kind of apparatus and method utilizing granulated blast-furnace slag waste heat to produce bio-oil are the object of this invention is to provide; the present invention utilizes granulated blast-furnace particle to carry particle as the heat of gasifying biomass and produces bio-oil by lysed biomass particle; the present invention can make full use of the waste heat of high temperature grain slag to produce bio-oil; save cost; be applicable to industrialization scale operation, there is excellent market application foreground.
For achieving the above object, the present invention adopts following technical proposals to be achieved:
A kind of device utilizing granulated blast-furnace slag waste heat to produce bio-oil; it comprises pelletizer, the blower fan be connected with pelletizer and rotating cone reactor; described rotating cone reactor is provided with opening for feed, air outlet and discharge port; the air outlet of described rotating cone reactor is connected with the first separator and condenser in turn; the discharge port of described rotating cone reactor is connected with the second separator and interchanger in turn; the high-temperature steam that described interchanger produces drives refrigerator work, and described refrigerator is connected with condenser with pipeline by water pump.
Further, be provided with the first motor driving pelletizer to rotate in described pelletizer, described rotating cone reactor has the second motor that rotating cone reactor rotates.
Further, described condenser is also connected with the storage tank storing bio-oil.
Further, described refrigerator is lithium bromide chiller.
Further, described pelletizer is connected with interchanger by the pipeline of transmission high-temperature flue gas.
The device that present invention also offers described in utilization produces the method for bio-oil, and it comprises the following steps:
(1) molten slag of 1400-1550 DEG C that blast furnace is discharged enters in pelletizer, and blower fan is blown into freezing air in pelletizer, molten slag is granulated into particle diameter 2-3mm, temperature is the solid-state blast furnace slag particle of 800-1000 DEG C;
Biomass are broken into the biological particles of particle diameter 1-2mm;
(2) temperature after lost partial heat is become the described solid-state blast furnace slag particle of 650-750 DEG C and biological particles to be conveyed into rotating cone reactor according to the ratio that mass ratio is 1.5-3:1 and to mix, biological particles is generated Pyrolysis Gas From Biomass, solid-state blast furnace slag particles generation coke and slag granules by rapid cleavage gasification;
(3) described Pyrolysis Gas From Biomass enters condenser after described first separator is separated, bio oil is obtained after cooling fast, the waste heat of described interchanger absorption furnace solid impurity particle produces high-temperature steam and drives refrigerator work, high-temperature steam is condensed into water of condensation by refrigerator, and water of condensation flows into condenser in order to cool bio-oil through water pump.
Further, described interchanger also absorbs the high-temperature flue gas driving refrigerator work that pelletizer produces.
Further, described biological particles carries out entering rotating cone reactor after drying and preheating through hot blast.
Further, described biological particles is stalk, pine.
Compared with prior art; advantage of the present invention and positively effect are: first blast furnace slag is granulated by the present invention; mix with biological particles; enter in rotating cone reactor and carry out heat scission reaction; its product filters out slag granules and coke through cyclonic separator; gaseous product enters in condenser and is condensed into bio oil; condensable gases is not as carrier gas recycle; afterheat of slags after separation is used to produce steam driven lithium bromide absorbing type refrigeration device further, and the cold of generation cools biomass gas fast for condenser.The blast furnace slag simultaneously produced can be used as the cement raw material of high-quality, coke recoverable.
The present invention, using blast furnace slag granulation particle as thermal barrier, has the advantages that temperature is high, heat storage capacity is strong, in biomass liquefying process, biomass flash pyrolysis can be formed bio-oil.
Liquid blast furnace slag granulation is being become solid granulates process by the present invention, employing be dry granulation technology, with existing flush slag technique first than, avoid causing water resource waste and SO
2and H
2the discharge of the obnoxious flavoures such as S.
High temperature air after cyclonic separation also can be used for dry and preheating biological particles, and for heating and conveying high temperature furnace slag particle, technique of the present invention does not produce noxious gas emission.
Technical scheme of the present invention maximally utilises a large amount of waste heats that high-temperature metallurgical slag is rich in and produces bio-oil, for the production of biomass energy provides " freely " energy, and sufficient heat energy can be provided, remaining pick up the heat also reduces the production cost of biomass liquefying, solve the Main Bottleneck of restricting current biomass energy suitability for industrialized production, efficiently solve a difficult problem for biomass fuel production cost this its industrialization of restriction too high.
After reading the specific embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the Structure and energy schema producing bio-oil device of the present invention, wherein 1. blast furnaces, 2. pelletizer, 3. the first motor, 4. blower fan, 5. rotating cone reactor, 6. the second motor, 7 interchanger, 8 lithium bromide chiller, 9 water pumps, 10 condensers, 11 first separators, 12 second separators, 13 storage tank, 14. slag chutes.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail.
Embodiment 1
One, the device producing bio-oil of the present invention
The granulated blast-furnace slag waste heat that utilizes of the present invention produces the apparatus structure of bio-oil as shown in Figure 1; described device comprises pelletizer 2, the blower fan 4 be connected with pelletizer 2 and rotatable rotating cone reactor 5; described rotating cone reactor 5 is provided with the discharge port of the opening for feed of upper end, the air outlet of upper end and lower end; the air outlet of described rotating cone reactor is connected with the first separator 11 and condenser 10 in turn, and described condenser 10 is also connected with the storage tank 13 storing bio-oil.
The discharge port of described rotating cone reactor is connected with the second separator 12 and interchanger 7 in turn; described pelletizer 2 is connected with interchanger 7 by the pipeline of transmission high-temperature flue gas; described interchanger 7 absorbs the heat through the waste heat of the isolated slag granules of the second separator and the high-temperature flue gas of pelletizer generation; thus producing the work of high-temperature steam driving refrigerator, refrigerator described in the present embodiment is lithium bromide chiller 8.Described refrigerator 8 is connected with condenser 10 with pipeline by water pump 9.
Be provided with the first motor 3 driving pelletizer to rotate in described pelletizer 2, described rotating cone reactor 5 has the second motor 6 that rotating cone reactor rotates.
Two, device of the present invention is utilized to produce the method for bio-oil
As shown in Figure 1, the method utilizing device of the present invention to produce bio-oil comprises the following steps:
1, the molten slag of about 1450 DEG C that blast furnace 1 is discharged flows in pelletizer 2 through slag chute 14, pelletizer 2 high speed rotating under the drive of the first motor 3, rotating speed is 2500 revs/min, by the molten slag granulation flowed into, spheroidal particle after granulation is solidified by the freezing air that blower fan 4 is blown in flight course, forms the high-temperature solid blast furnace slag particle of particle diameter 2mm, temperature 800-1000 DEG C;
Biomass are broken into the biological particles of particle diameter 1-2mm simultaneously, and the hot blast utilizing external source hot blast or systemic circulation to produce dry and preheating by biological particles.
2, described solid-state blast furnace slag particle is admitted to rotating cone reactor 5 inside as thermal barrier together with biological particles, rotating cone reactor 5 high speed rotating under the drive of the second motor 6 makes biological particles and thermal barrier rise along spiral curve, the two is mixing fully, biological particles, by rapid cleavage, mainly forms coke, condensable gases, non-condensable gases three kinds of products; Solid-state blast furnace slag particles generation coke and slag granules.
3, thermo-cracking produce after a part of product-gas to derive from the air outlet of rotating cone reactor through delivery line and enter after the first separator 11 (cyclonic separator) carries out revolving point, through condenser 10 condensation, condensable gas becomes bio-oil, preserves to storage tank 13 through Cemented filling.
Another part product-coke after thermo-cracking produces and the lower slag granules of temperature obtain coke and slag granules after the second separator 12 (cyclonic separator) revolves point; Interchanger 7 absorb high-temperature flue gas that liquid slag granulating process produces and separator 12 to revolve point after the waste heat of slag granules; produce high-temperature steam to work for driving refrigerator (lithium bromide chiller 8), the water coolant that lithium bromide chiller 8 produces delivers into condenser 10 through water pump 9 and forms bio-oil for cooling condensable gases.Slag in this process after interchanger 7 heat exchange can be used as the cement raw material of high-quality, and the solidification coke of the flue gas after heat exchange for grain slag particle after revolving point is recovered utilization.
Three, the present invention also by experiment confirmatory reaction temperature on the impact of biomass pyrolytic oil yield rate
The principal element affecting biomass through pyrolysis process comprises chemistry and physics two broad aspect.Chemical factor comprise series of complex once with secondary chemical reaction; The physical property etc. of the heat transfer of physical factor mainly in reaction process, mass transfer and raw material.According to different processing condition, thermal cracking processes can be controlled by chemical factor and physical factor.Generally believe, the most important factor affecting biomass through pyrolysis process and product composition is temperature of reaction, the gas phase residence time, particle size, biomass kind etc., and Different factor is not independent action in biomass through pyrolysis process, often intersect, reduction as particle diameter can accelerate the temperature rise rate of particle, so should consider the impact that duty parameter causes biomass through pyrolysis comprehensively.The present invention mainly verifies the impact of temperature on biomass pyrolytic oil yield rate.
Temperature lower than the reaction of 400 DEG C of biomass through pyrolysis carry out very slow, split product is charcoal and non-condensable gas mainly, so temperature of reaction is from 450 DEG C.
Table 1 differing temps is on the impact of biomass produce oil
As can be seen from the experimental result of table 1, in the temperature range of 450-600 DEG C, the output of bio oil first increases with the rising of temperature, and the continuation again with temperature after reaching maximum value raises and reduces, and the output of gas raises with temperature and increases; When temperature is higher than 500 DEG C, gas becomes primary product.Therefore, maximum to oil yield rate, then the temperature of biomass through pyrolysis selection is generally at 500 DEG C.
In the process of blast furnace slag and biomass heat exchange; have calorific loss; according to heat and mass rule, the blast furnace slag particle temperature entering rotating cone reactor should than biomass pyrolytic temperature height 150-200 DEG C, and the blast furnace slag particle temperature therefore entering rotating cone reactor after granulation selects 650-750 DEG C.
Above embodiment only in order to technical scheme of the present invention to be described, but not is limited; Although with reference to previous embodiment to invention has been detailed description, for the person of ordinary skill of the art, still can modify to the technical scheme described in previous embodiment, or equivalent replacement is carried out to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention's technical scheme required for protection.
Claims (4)
1. produce a method for bio-oil, it is characterized in that it comprises the following steps:
(1) molten slag of 1400-1550 DEG C that blast furnace is discharged enters in pelletizer, and blower fan is blown into freezing air in pelletizer, molten slag is granulated into particle diameter 2-3mm, temperature is the solid-state blast furnace slag particle of 800-1000 DEG C;
Biomass are broken into the biological particles of particle diameter 1-2mm;
(2) temperature after lost partial heat is become the described solid-state blast furnace slag particle of 650-750 DEG C and biological particles to be conveyed into rotating cone reactor according to the ratio that mass ratio is 1.5-3:1 and to mix, biological particles is generated Pyrolysis Gas From Biomass, solid-state blast furnace slag particles generation coke and slag granules by rapid cleavage gasification;
(3) described Pyrolysis Gas From Biomass enters condenser after the first separator is separated, bio oil is obtained after cooling fast, the waste heat of interchanger absorption furnace solid impurity particle produces high-temperature steam and drives refrigerator work, high-temperature steam is condensed into water of condensation by refrigerator, and water of condensation flows into condenser in order to cool bio-oil through water pump.
2. the method producing bio-oil according to claim 1, is characterized in that: described interchanger also absorbs the high-temperature flue gas driving refrigerator work that pelletizer produces.
3. the method producing bio-oil according to claim 1, is characterized in that: described biological particles carries out entering rotating cone reactor after drying and preheating through hot blast.
4. the method producing bio-oil according to claim 1, is characterized in that: described biological particles is stalk, pine.
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| CN201310349224.9A CN103396823B (en) | 2013-08-12 | 2013-08-12 | Method for preparing biomass oil by using waste heat of granulated blast furnace slag |
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| CN201310349224.9A CN103396823B (en) | 2013-08-12 | 2013-08-12 | Method for preparing biomass oil by using waste heat of granulated blast furnace slag |
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| CN103396823A CN103396823A (en) | 2013-11-20 |
| CN103396823B true CN103396823B (en) | 2015-06-17 |
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| CN104192799B (en) * | 2014-08-15 | 2016-01-06 | 重庆科技学院 | High-temperature metallurgical slag particulate catalytic gasified bio-matter produces hydrogen-rich gas device and method |
| CN105567342A (en) * | 2015-12-22 | 2016-05-11 | 重庆大学 | Device and method of utilizing blast furnace slag as heat carrier to prepare biomass oil |
| CN105647584B (en) * | 2016-01-19 | 2019-07-30 | 青岛理工大学 | Technology for recycling biomass and harmlessly treating chromium slag by using waste heat of blast furnace slag |
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| CN105728425B (en) * | 2016-01-19 | 2018-06-26 | 青岛理工大学 | Synchronization technology for recycling biomass and harmlessly treating chromium slag by using steel slag waste heat |
| CN105542818B (en) * | 2016-01-19 | 2018-04-20 | 青岛理工大学 | Synchronization technology for recycling sludge and harmlessly treating chromium slag by using steel slag waste heat |
| CN105567327B (en) * | 2016-02-25 | 2018-01-09 | 青岛理工大学 | Method for preparing hydrogen-rich fuel gas by gasifying high-humidity sludge based on blast furnace slag waste heat recovery |
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| CN107894170A (en) * | 2017-11-08 | 2018-04-10 | 中科合肥煤气化技术有限公司 | A kind of high temperature furnace slag heat recovery refrigerating plant |
| CN107760383A (en) * | 2017-11-13 | 2018-03-06 | 中国矿业大学(北京) | Blast furnace slag waste heat catalytic pyrolysis biomass gas technology |
| CN110057200B (en) * | 2019-05-22 | 2024-05-14 | 昆明理工大学 | Combustible solid waste pyrolysis system based on slag waste heat recovery |
| CN112175648A (en) * | 2020-10-30 | 2021-01-05 | 上海电力大学 | Energy-saving system for preparing biomass oil by using waste heat of power plant ash |
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