CN112175642A - Device and method for synchronously reducing manganese-iron-containing minerals through biomass pyrolysis - Google Patents
Device and method for synchronously reducing manganese-iron-containing minerals through biomass pyrolysis Download PDFInfo
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- CN112175642A CN112175642A CN202010830644.9A CN202010830644A CN112175642A CN 112175642 A CN112175642 A CN 112175642A CN 202010830644 A CN202010830644 A CN 202010830644A CN 112175642 A CN112175642 A CN 112175642A
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 187
- 239000002028 Biomass Substances 0.000 title claims abstract description 134
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 70
- 239000011707 mineral Substances 0.000 title claims abstract description 70
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000009467 reduction Effects 0.000 claims abstract description 118
- 239000000463 material Substances 0.000 claims abstract description 68
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims abstract description 60
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 241001474374 Blennius Species 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 6
- 241000512259 Ascophyllum nodosum Species 0.000 claims description 4
- 241000196251 Ulva arasakii Species 0.000 claims description 4
- 239000010902 straw Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 14
- 229910052748 manganese Inorganic materials 0.000 description 14
- 239000011572 manganese Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 8
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000010941 cobalt Substances 0.000 description 6
- 229910017052 cobalt Inorganic materials 0.000 description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
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- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
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- 239000002994 raw material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000000921 elemental analysis Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910001655 manganese mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
- C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/043—Sulfurated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B47/00—Obtaining manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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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- Manufacturing & Machinery (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention belongs to the technical field of mineral reduction, and particularly relates to a device and a method for synchronously reducing manganese-iron-containing minerals through biomass pyrolysis. In the device, a furnace body is internally provided with a pyrolysis tube and a pyrolysis reduction tube, and the pyrolysis reduction tube is sleeved in the pyrolysis tube; the biomass preheating pipe, the pyrolysis induced draft fan, the vertical circulating pipe, the pyrolysis reduction pipe, the discharge pipe, the primary cyclone separator, the secondary cyclone separator and the material circulating pipe are sequentially communicated with the inner space of the furnace body; a biomass conveying mechanism is arranged in the biomass preheating pipe and is communicated with the biomass feed inlet; the vertical circulating pipe is also communicated with an outlet of the mineral conveying mechanism, and an inlet of the mineral conveying mechanism is communicated with the mineral charging port. The invention can fully utilize the biomass pyrolysis product to reduce the seabed manganese oxide ore, and the environmental parameters of the pyrolysis reduction manganese oxide ore can be regulated and controlled according to the performance of the ore. The recovery rate of the reduction product is high, and the classification is carried out, so that the material and time cost are saved for the subsequent processing technology.
Description
Technical Field
The invention belongs to the technical field of deep sea manganese oxide ore reduction, and discloses a device and a method for synchronously reducing manganese-iron-containing minerals (especially deep sea manganese oxide ores) through biomass pyrolysis.
Background
With the development of society, energy crisis and environmental crisis face worldwide due to the consumption of fossil resources and the deterioration of the environment. Therefore, it is important to find a new renewable and environmentally friendly alternative energy source. Biomass is an inexhaustible renewable resource, the global biomass yield exceeds 1000 hundred million tons every year, and even if the biomass capable of being developed and utilized is not more than 1 percent of the total amount, the biomass energy becomes the fourth largest consumption energy which is second only to coal, petroleum and natural gas, and the energy crisis on the global scale can be improved by enhancing the utilization of the biomass energy. Biomass pyrolysis technology converts biomass into high-grade solid, liquid and gaseous fuels by thermochemical means.
The reduction technology is widely applied in the utilization process of the deep sea manganese oxide ore, but coal, natural gas and sulfur dioxide are mostly adopted as the reducing agent at present, the biomass pyrolysis and the reduction of the deep sea manganese oxide ore cannot be combined, and the problems of insufficient utilization of pyrolysis products, high energy consumption, serious pollution problem and the like still exist in the conventional roasting reduction device and technology, so that the significance of researching the device and the method for synchronously reducing the deep sea manganese oxide ore by biomass pyrolysis is great.
Chinese utility model CN210394475U "A manganese ore roasting device" discloses a manganese ore roasting device, the structure of which comprises a support frame, a box body, a box door, an insert block, a U-shaped lock piece, a bolt, a control box body, an external power line, a temperature controller, a heating switch, a roasting chamber, a silicon carbide electrothermal element, a carrying device and a supporting mechanism, by arranging the carrying device and the supporting mechanism, the problem that the ore is inconvenient to be sent into the deep part inside the box body before and after roasting and the use is inconvenient is solved, a hand wheel drives a bolt to rotate, so that a first transverse plate is continuously close to a second transverse plate, an X-shaped expansion bracket is upwards lifted until the X-shaped expansion bracket is lifted to the highest position, a pull rod is grasped, a placing table is pulled out of the roasting chamber, a slide block at the bottom of the placing table moves in a chute on a bottom frame, meanwhile, a rolling shaft rolls in the bottom frame, after the placing table, the beneficial effect of being convenient for carry out the calcination with the ore feeding box in is reached. Although the invention solves the problem that the ore is inconvenient to be fed into the deep part inside the box body before and after roasting, the invention only slightly improves the roasting device, is a simple manganese ore roasting device, does not combine roasting and reduction of manganese ore, does not realize pyrolysis of biomass and reduction of manganese ore in a furnace body, and has narrow application range and small application range.
The utility model discloses a chinese utility model CN208733190U "a non ferrous metal mineral products roasting device" discloses a non ferrous metal mineral products roasting device, including roasting the stove over a slow fire, roast burning furnace upside and connect exhaust gas purification device, roast burning furnace right side and pass through gas-supply pipe connection oxygen suppliment mechanism, the inside heated board of inlaying of protecting sheathing that roasts the stove over a slow fire, but the heated board is inside to be connected the tripper through the split mode, the tripper is turned over the material roller by motor electric connection, the both ends swing joint backup pad of turning over the material roller, just the material roller that turns over comprises rolling bearing, the welding of rolling bearing upside has the switch plate. The utility model discloses a through the tripper, the rolling bearing who utilizes the motor to drive the stirring roller rotates, and the shifting plate that rolling bearing drove the upside carries out the stirring to metal mineral products and handles, can improve the calcination efficiency of metal mineral products at the in-process of stirring, then be the depressed groove to the metal sheet surface design of shifting plate, is convenient for improve stirring efficiency, then through inside cavity hole structure, utilizes inside heat preservation medium can reach heat retaining purpose. Although the patent realizes full automation of the roasting process, harmful flue gas and dust generated by roasting of non-ferrous metal ores need to be additionally provided with a waste gas purification device, the patent is only suitable for roasting the ores simply, materials are simply mechanically turned in the roasting process, the roasting efficiency is low, the roasting of the ores is incomplete, the stepped utilization of heat is not realized, and the application range is limited to a certain extent.
Chinese patent application CN108396134A "an iron ore roasting device and method for oxidation preheating and fluidized reduction" discloses an iron ore roasting device and method for oxidation preheating and fluidized reduction, wherein the iron ore roasting device mainly comprises a feeding unit, an oxidation preheating unit, a fluidized reduction reactor and a hot flue gas supply unit; the feeding end of the oxidizing preheating unit is communicated with the discharging end of the feeding unit and is used for oxidizing and preheating the mineral powder; the gas outlet end of the hot flue gas supply unit is communicated with the gas inlet end of the oxidation preheating unit and is used for supplying oxygen-containing or medium-heat flue gas to the oxidation preheating unit; the feed end of the fluidized reduction reactor is communicated with the discharge end of the oxidation preheating unit and is used for fluidized reduction of the preheated mineral powder. The iron ore roasting device and the iron ore roasting method combine oxidation preheating and fluidized reduction, and effectively improve the quality of sorted products and the roasting production efficiency. Although the patent realizes the combination of the roasting process and the reduction process to reduce the iron ore under fluidization and improve the roasting reduction efficiency, the preheating of the ore needs to add fuel coal, and the reducing gas needs to be added separately. The materials are preheated by two-stage cyclone separation, harmful components in the smoke have certain influence on the properties of the materials, and the heat loss is more. Coal combustion and material reduction are not completed in one device, equipment connection is complex, the reaction process is not easy to control, and the generated flue gas needs to be purified by a separate purification treatment device.
In summary, the manganese ore roasting device disclosed at present only improves the roasting process correspondingly, and does not combine the processes of biomass pyrolysis, ore roasting, ore reduction or oxidation and the like, and other disclosed ore roasting devices have narrow application range, can generate certain environmental pollution problem, and do not realize clean, quick and energy multi-stage utilization. The deep sea iron and manganese resources are rich, the most critical step of utilizing the deep sea iron and manganese resources is to reduce iron and manganese minerals, biomass is also an important clean energy, the utilization rate is low at present, and a roasting device and a roasting method for biomass pyrolysis, manganese ore reduction and biomass energy gradient multi-stage utilization are not realized so far.
Disclosure of Invention
The invention aims to overcome the defects of the existing pyrolysis device and roasting device technology, and provides a device for synchronously reducing manganese-iron-containing minerals through biomass pyrolysis.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for synchronously reducing manganese-iron-containing minerals by biomass pyrolysis comprises a furnace body 1, a pyrolysis pipe 2, a discharge pipe 4, a vertical circulating pipe 7, a material circulating pipe 10, a pyrolysis reducing pipe 13 and a biomass preheating pipe 16;
a pyrolysis tube 2 and a pyrolysis reduction tube 13 are arranged in the furnace body 1, and the pyrolysis reduction tube 13 is sleeved in the pyrolysis tube 2; the inlet of the pyrolysis pipe 2 is connected with the outlet of the biomass preheating pipe 16, the outlet of the pyrolysis pipe 2 is connected with the inlet of a pyrolysis induced draft fan 6, the outlet of the pyrolysis induced draft fan 6 is connected with the inlet of a vertical circulating pipe 7, the outlet of the vertical circulating pipe 7 is connected with the inlet of a pyrolysis reduction pipe 13, the outlet of the pyrolysis reduction pipe 13 is connected with the inlet of a discharge pipe 4, the outlet of the discharge pipe 4 is connected with the inlet of a first-stage cyclone separator 14, the outlet of the first-stage cyclone separator 14 is connected with the inlet of a second-stage cyclone separator 15 through a pipeline, the outlet of the second cyclone separator 15 is connected with the inlet of a material circulating pipe 10, and the outlet of the material circulating pipe 10 is communicated with the inner space;
a biomass conveying mechanism 12 is arranged in the biomass preheating pipe 16, and the biomass conveying mechanism 12 is communicated with the biomass feed inlet 11;
the vertical circulating pipe 7 is also communicated with an outlet of a mineral conveying mechanism 9, and an inlet of the mineral conveying mechanism 9 is communicated with a mineral charging port 8.
Preferably, the pyrolysis-reduction tube 13 and the pyrolysis tube 2 are each in a spiral shape, and the pyrolysis-reduction tube 13 is disposed in the spiral space of the pyrolysis tube 2.
In the invention, the discharge pipe 4, the vertical circulating pipe 7, the material circulating pipe 10 and the biomass preheating pipe 16 are all arranged outside the furnace body 1.
Preferably, there is a height difference between the first stage 14 and second stage 15 cyclones.
Preferably, a temperature measuring element 3 is arranged in the inner space of the furnace body 1, and the temperature measuring element is a thermocouple.
Preferably, a discharging induced draft fan 17 is arranged on the discharging pipe 4, and a material circulating induced draft fan 5 is arranged on the material circulating pipe 10; an exhaust pipe is arranged at the top end of the furnace body 1.
In the present invention, the mineral conveying mechanism 9 and the biomass conveying mechanism 12 may be screw conveyors.
The invention also provides a method for synchronously reducing manganese-iron-containing minerals by biomass pyrolysis based on the device, which comprises the following steps:
1) biomass enters from a biomass feed inlet 11, is preheated in a biomass preheating pipe 16, and is then conveyed into a pyrolysis pipe 2 in a furnace body 1 through a biomass conveying mechanism 12; biomass is pyrolyzed in the pyrolysis pipe 2, a pyrolysis product of the biomass moves upwards under the action of a pyrolysis induced draft fan 6, and is mixed with manganese-iron-containing minerals entering through a vertical circulating pipe 7 and a mineral charging hole 8;
2) the mixture of the biomass pyrolysis product and the manganese-iron-containing mineral enters a pyrolysis reduction tube 13 of the furnace body 1, the manganese-iron-containing mineral is reduced by the biomass pyrolysis product in the pyrolysis reduction tube 13, and meanwhile, the biomass which is not completely pyrolyzed is pyrolyzed again and reduces the manganese-iron-containing mineral;
3) the pyrolysis reduction product enters a primary cyclone separator 14 and a secondary cyclone separator 15 through a discharge pipe 4, and the reduction product of the manganese-iron-containing mineral is separated from the pyrolysis product which does not participate in reduction;
4) the pyrolysis products which do not participate in the reduction are returned to the furnace body 1 through the material circulating pipe 10 for combustion utilization.
Preferably, the biomass is one or more of sawdust, straw, corncob, leaves, seaweed, sea lettuce and kelp.
Preferably, the ferromanganese-containing mineral is a manganese oxide-containing iron oxide ore in the deep sea and/or a manganese oxide-containing iron oxide ore on the land.
Preferably, the preheating temperature of the biomass preheating pipe (16) is 100-400 ℃, and the pyrolysis temperature of the furnace body is 400-1200 ℃.
In the invention, the biomass can be waste sawdust, straws, corncobs, leaves, seaweed, sea lettuce, kelp and the like, and the deep-sea manganese oxide ore is various to-be-reduced deep-sea manganese oxide ores. That is, the biomass entering the furnace body for pyrolysis can be a certain biomass, or can be a mixture of more than two kinds of various biomasses, for example, a mixture of two, three or four kinds of biomasses, for example, a biomass material which is not pyrolyzed or a waste biomass material which is subjected to primary decomposition. The pyrolysis reduction temperature and time may then be selected based on the material properties.
Preferably, the furnace body and the biomass preheating pipe are externally covered by heat insulating materials.
Specifically, the invention also provides a method based on the device, which comprises the following steps:
1) the biomass feed inlet is used as a feed inlet for one or more mixed materials of various waste biomasses such as sawdust, straws, corncobs, leaves, seaweed, sea lettuce, kelp and the like;
biomass enters from a biomass feed inlet 11 and is conveyed into a pyrolysis tube 2 in a furnace body 1 through a screw conveyer; the biomass is pyrolyzed in the pyrolysis tube 2 to generate reducing gases of CO and CH4、H2、C2H4Iso and non-reducing gas CO2And tar and fixed carbon, the biomass pyrolysis product continuously moves upwards under the action of the pyrolysis induced draft fan 6, and is mixed with the material entering from the mineral charging hole 8 through the vertical circulating pipe 7;
2) the mineral charging opening is used as various deep sea manganese oxide minerals needing to be reduced, and can be a single mineral or a mixture of several minerals;
the manganese oxide ore is mixed with the biomass pyrolysis product from the ore feeding port 8 through the screw conveyer, the mixed material enters a pyrolysis reduction pipe 13 in the furnace body 1, the biomass pyrolysis product reduces ore, biomass which is not completely pyrolyzed is pyrolyzed again, and the deep sea manganese oxide ore is reduced;
3) the two-stage cyclone separator is used for grading pyrolysis synchronous reduction products and separating the reduction products of the ores from pyrolysis products which do not participate in reduction. Certain distance and height difference exist between the two stages of cyclone separators, for example, the first stage cyclone separator is higher than the second stage cyclone separator, the distance and height parameters can be adjusted according to raw material parameters, two different size reduction products obtained by separation can be respectively processed by subsequent processing technology, so that the material and time cost can be saved;
materials coming out of a pyrolysis reduction pipe 13 in the furnace body 1 enter a first-stage cyclone separator 14 through a discharge pipe 4, the first-stage cyclone separator 14 carries out primary classification on a biomass pyrolysis product and a manganese oxide ore reduction product, heavy materials are reduction products, relatively light materials are classified again through a second-stage cyclone separator 15 to obtain reduction products and pyrolysis products which do not participate in reduction, and the pyrolysis products which do not participate in reduction are returned to the furnace body 1 through a material circulation pipe 10 for combustion utilization;
the pyrolysis roasting reduction furnace body is fixed on the bottom bracket.
The outer side of the furnace body of the pyrolysis reduction furnace is coated with a heat insulation structure, the outer side of the pyrolysis reduction furnace is coated with the outer wall of the pyrolysis reduction furnace, and thermocouple mounting holes are formed in the furnace wall of the pyrolysis reduction furnace and the same horizontal position of the heat insulation structure at the same vertical interval.
The pyrolysis tube in the furnace body of the pyrolysis reduction furnace is connected with the vertical circulating tube outside the furnace body to form material cyclic pyrolysis and heat cyclic utilization.
The cyclone separator outside the pyrolysis reduction furnace is communicated with the discharge circulating pipe, and the discharge circulating pipe is communicated with the furnace body, so that biomass is fully utilized.
The furnace body of the pyrolysis reduction furnace comprises an external discharging circulating pipeline, a draught fan and a discharging circulating pipe which form a heat recovery part.
The biomass material preheating pipe and the screw conveyer in the biomass material preheating pipe are also equivalent to a biomass preheating conveyer, biomass enters the preheating conveyer from the feeding hole for preheating, and the speed of the propeller of the screw conveyer is adjusted by adjusting the rotating speed of the motor, so that the retention time of the biomass material in the preheating conveyer is adjusted, and the effects of removing water in the material and preheating are achieved. The material pushed by the preheating conveyor is pyrolyzed through the pyrolysis pipe. The pyrolysis product continuously moves upwards under the action of the induced draft fan and finally enters a vertical circulating pipe outside the furnace body, and the temperature in the furnace is measured by a thermocouple. And mixing the pyrolysis product with the ore material, and then feeding the mixture into the furnace body again for pyrolysis reduction.
The invention can be used for the pyrolysis of biomass materials with the granularity of less than 50 mm.
The invention can be used for the synchronous reduction of ore materials with the granularity of less than 0.5mm, and the granularity of a reduction product is less than 0.05 mm.
In the invention, the biomass pyrolysis time is 1-5min, and the ore material reduction time is 2-6 min.
The device for synchronously reducing the deep sea manganese oxide ore by biomass pyrolysis has a simple structure and is convenient to operate. The material pyrolysis and mineral reduction are efficient because the material is in a fluidized state during pyrolysis and reduction.
According to the invention, the biomass preheating pipe, the pyrolysis induced draft fan, the vertical circulating pipe, the pyrolysis reduction pipe, the discharge pipe, the primary cyclone separator, the secondary cyclone separator and the material circulating pipe are sequentially communicated with the inner space of the furnace body, so that the biomass pyrolysis product can be fully utilized to reduce the seabed manganese oxide ore, and the environmental parameters of the pyrolysis reduction manganese oxide ore can be regulated and controlled according to the performance of minerals. The recovery rate of the reduction product is high, and the classification is carried out, so that the material and time cost are saved for the subsequent processing technology. The biomass pyrolysis product is used for reducing manganese oxide ores, a heat source is provided for pyrolysis and raw material preheating, the deep sea manganese oxide ores are efficiently reduced, the pyrolysis, the reduction and the energy gradient utilization are performed in a synergistic mode, and useless gases generated by combustion are carbon dioxide, water vapor and the like, so that the pollution problem is avoided.
Compared with the prior art, the invention has the following advantages:
the pyrolysis of biomass and the reduction of the deep sea manganese oxide ore are combined, the manganese oxide ore is reduced while the biomass is pyrolyzed, and the pyrolyzed biomass material can be a single biomass or a mixture of multiple waste biomasses; the pyrolysis adopts a fluidization mode and is provided with a pyrolysis pipe, the pyrolysis time is regulated and controlled according to the characteristics of the biomass, and the biomass is efficiently pyrolyzed; fully reducing manganese oxide ore in the reducing gas atmosphere pyrolyzed in the pyrolysis tube, regulating and controlling the reduction time according to the components of the manganese oxide ore and the reducing gas, and having high reduction efficiency; the unused pyrolysis products enter the furnace to be combusted, heat is provided for biomass pyrolysis and manganese oxide ore reduction, hot gas discharged by the furnace body through an exhaust valve is mainly carbon dioxide, nitrogen dioxide, water vapor and the like, pollution is not generated, a heat source is provided for next-stage operation, and the reduction characteristic and the combustion characteristic of the biomass pyrolysis products are fully utilized. The biomass pyrolysis products are classified by a cyclone separator and are respectively subjected to subsequent treatment so as to save materials and time cost. The device carries out synergy and integration on pyrolysis, reduction and heat energy utilization.
Drawings
FIG. 1 is a schematic structural view of a pyrolysis synchronous reduction apparatus according to the present invention;
reference numerals: 1. a furnace body; 2. a pyrolysis tube; 3. a temperature measuring element; 4. a discharge pipe; 5. a material circulation induced draft fan; 6. pyrolyzing the induced draft fan; 7. a vertical circulation pipe; 8. a mineral feed port; 9. a mineral conveying mechanism; 10. a discharge circulating pipe; 11. a biomass feed inlet; 12. a biomass conveying mechanism; 13. a pyrolysis reduction tube; 14. a first stage cyclone; 15. a second stage cyclone; 16. a biomass preheating pipe; 17. discharging a draught fan; 18. and (4) exhausting the valve.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description, which are provided for illustration purposes only and are not meant to be limiting.
Example 1
As shown in fig. 1, the device for synchronously reducing ferromanganese-containing minerals by biomass pyrolysis comprises a furnace body 1, a pyrolysis pipe 2, a discharge pipe 4, a vertical circulating pipe 7, a material circulating pipe 10, a pyrolysis reducing pipe 13 and a biomass preheating pipe 16;
a pyrolysis tube 2 and a pyrolysis reduction tube 13 are arranged in the furnace body 1, and the pyrolysis reduction tube 13 is sleeved in the pyrolysis tube 2; the inlet of the pyrolysis pipe 2 is connected with the outlet of the biomass preheating pipe 16, the outlet of the pyrolysis pipe 2 is connected with the inlet of a pyrolysis induced draft fan 6, the outlet of the pyrolysis induced draft fan 6 is connected with the inlet of a vertical circulating pipe 7, the outlet of the vertical circulating pipe 7 is connected with the inlet of a pyrolysis reduction pipe 13, the outlet of the pyrolysis reduction pipe 13 is connected with the inlet of a discharge pipe 4, the outlet of the discharge pipe 4 is connected with the inlet of a first-stage cyclone separator 14, the outlet of the first-stage cyclone separator 14 is connected with the inlet of a second-stage cyclone separator 15 through a pipeline, the outlet of the second cyclone separator 15 is connected with the inlet of a material circulating pipe 10, and the outlet of the material circulating pipe 10 is communicated with the inner space;
a biomass conveying mechanism 12 is arranged in the biomass preheating pipe 16, and the biomass conveying mechanism 12 is communicated with the biomass feed inlet 11;
the vertical circulating pipe 7 is also communicated with an outlet of a mineral conveying mechanism 9, and an inlet of the mineral conveying mechanism 9 is communicated with a mineral charging port 8.
The pyrolysis reduction tube 13 and the pyrolysis tube 2 are both spiral-shaped, and the pyrolysis reduction tube 13 is disposed in the spiral-shaped space of the pyrolysis tube 2.
The discharge pipe 4, the vertical circulating pipe 7, the material circulating pipe 10 and the biomass preheating pipe 16 are all arranged outside the furnace body 1.
There is a height difference between the first stage 14 and second stage 15 cyclones.
The inner space of the furnace body 1 is provided with a temperature measuring element 3 which is a thermocouple.
A discharge draught fan 17 is arranged on the discharge pipe 4, and a material circulating draught fan 5 is arranged on the material circulating pipe 10; the top end of the furnace body 1 is provided with an exhaust pipe, and an exhaust valve 18 is arranged in the exhaust pipe.
The mineral conveying mechanism 9 and the biomass conveying mechanism 12 can be selected from screw conveyors.
Example 2
As shown in figure 1, a device and a method for synchronously reducing deep sea manganese oxide ore by biomass pyrolysis. The device comprises a furnace body 1, wherein a pyrolysis tube 2 and a pyrolysis reduction tube 13 are arranged in the inner space of the furnace body; a biomass feeding hole 11 is formed in the right side of the furnace body, a biomass conveying mechanism 12 is arranged at the lower end of the biomass feeding hole 11, and the biomass conveying mechanism 12 is connected with the pyrolysis pipe 2; the pyrolysis pipe 2 is communicated with a vertical circulating pipe 7 outside the furnace body, and the left side of the vertical circulating pipe 7 is connected with a mineral charging port 8 for adding deep-sea manganese oxide ore; the pyrolysis reduction pipe 13 is communicated with the discharge pipe 4, the discharge pipe 4 is connected with the first-stage cyclone separator 14, and the first-stage cyclone separator 14 is connected with the second-stage cyclone separator 15.
The right side of the furnace body 1 is provided with a biomass preheating pipe 16 protruding outwards, a biomass conveying mechanism 12 is arranged in the biomass preheating pipe 16, the biomass preheating pipe 16 is also provided with a biomass feed port 11, and materials entering from the biomass feed port 11 are conveyed into the furnace body 1 through a screw conveyor;
the biomass preheating pipe 16 is communicated with one end of the pyrolysis pipe 2, the other end of the pyrolysis pipe 12 is communicated with a pyrolysis induced draft fan 6 outside the furnace body through the upper left corner of the furnace body 1, the pyrolysis induced draft fan 6 is communicated with a vertical circulating pipe 7 outside the furnace body, the left side of the vertical circulating pipe 7 is communicated with a mineral conveying mechanism 9, the mineral conveying mechanism 9 is communicated with a material feeding hole 8, and the mineral conveying mechanism 9 is communicated with the vertical circulating pipe 7 outside the furnace body and a pyrolysis reduction pipe 13;
the pyrolysis reduction pipe 13 is communicated with a discharge pipe 4 outside the furnace body, the discharge pipe 4 is communicated with a first-stage cyclone separator 14, the first-stage cyclone separator 14 is communicated with a second-stage cyclone separator 15, the upper part of the second-stage cyclone separator 15 is communicated with a material circulating pipe 10, and the material circulating pipe 10 is communicated with the lower right end of the furnace body 1.
The first-stage cyclone separator 14 is used for carrying out primary classification on the biomass pyrolysis product and the reduction product of manganese oxide ore, the heavy material is the reduction product, the relatively light material is classified again through the second-stage cyclone separator 15 to obtain the reduction product and the pyrolysis product which does not participate in reduction, and the reduction product and the pyrolysis product are returned to the furnace body 1 through the material circulating pipe 10 for combustion utilization;
the two stages of cyclone separators have certain distance and height difference and are adjusted according to the parameters of the raw materials to obtain higher recovery rate of the reduction products, and the two reduction products with different particle sizes obtained by separation of the cyclone separators can be respectively processed by the subsequent processing technology to save materials and time cost;
the exhaust valve 18 at the upper part of the furnace body provides a heat source for the next operation, and the main components of the gas are carbon dioxide, nitrogen dioxide, water vapor and the like, so that the problem of pollution is not caused;
the pyrolysis-reduction tube 13 is disposed in a space where the pyrolysis tube 2 is spiraled. The furnace body and the material preheating pipe are covered by heat insulation materials. The temperature measuring element is a thermocouple.
The device is used for mineral reduction, and the biomass and minerals are as follows:
the analysis results of the waste sawdust in a certain Beijing furniture processing factory are shown in the following table (wt%)
The results of multi-element analysis of the ocean cobalt-rich crusting chemistry are given in the following table (wt%)
Adjusting the temperature of a pyrolysis furnace to 450 ℃, feeding waste sawdust (with granularity of less than 50mm) through a feed inlet of a material preheating pipe, continuously preheating in the process of spiral propulsion, preheating at 100 ℃, moving upwards and pyrolyzing for 5min under the action of an induced draft fan after entering a pyrolysis pipe of the pyrolysis reduction furnace, feeding ocean cobalt-rich crusts (with granularity of less than 0.5mm) through a feed inlet at the left side of the furnace body, mixing with sawdust pyrolysis products, then entering the pyrolysis pipe in the furnace body, reducing the ocean cobalt-rich crusts for 6min, enabling the reduction products to enter a cyclone separator under the action of the induced draft fan, separating the reduction products from the pyrolysis products which do not participate in reduction by the cyclone separator to obtain the reduction products (with granularity of less than 0.05mm), returning the pyrolysis products which do not participate in reduction to the furnace again to release heat through combustion, enabling the sawdust energy to be used as a component, and enabling the reduction rate of manganese dioxide in the ocean cobalt, the leaching rate of the copper, cobalt, nickel and manganese in the reduction product reaches more than 95 percent.
Example 3
The apparatus described in example 1 was used for mineral reduction, and the biomass and minerals used were as follows:
the results of elemental analysis of seaweed are shown in the following table (wt%)
The chemical composition analysis results of manganese nodules are shown in the following table (wt%)
Adjusting the temperature of a pyrolysis furnace to 800 ℃, feeding seaweed (with granularity of less than 50mm) through a feed inlet of a material preheating pipe, continuously preheating in the process of spiral propulsion, preheating at 400 ℃, moving upwards under the action of an induced draft fan after entering a pyrolysis pipe of a pyrolysis reduction furnace, simultaneously pyrolyzing for 3min, feeding manganese nodules (with granularity of less than 0.5mm) through a feed inlet at the left side of the furnace body, mixing with a seaweed pyrolysis product, then entering the pyrolysis pipe in the furnace body, roasting and reducing for 4min, feeding the reduction product into a cyclone separator under the action of the induced draft fan, separating the reduction product from the pyrolysis product which does not participate in reduction by the cyclone separator to obtain a reduction product (with granularity of less than 0.05mm), returning the pyrolysis product which does not participate in reduction to the furnace again to burn and release heat, enabling the seaweed energy to be utilized, leaching the roasted slag by sulfuric acid, wherein copper is contained in the manganese nodules, The leaching rate of valuable metals such as cobalt, nickel, manganese and the like reaches more than 95 percent.
Example 4
The apparatus described in example 1 was used for mineral reduction, and the biomass and minerals used were as follows:
the results of the elemental analysis of the corncobs are shown in the following table (wt%)
The chemical composition analysis result of the low-grade manganese dioxide mineral in Hunan is as follows (wt%)
The crushed corncobs are used as reducing agents, the temperature of the pyrolysis furnace is adjusted to 1200 ℃, and the preheating temperature is 400 ℃. Respectively adding the crushed corncobs and low-grade manganese dioxide ore into a furnace, wherein the pyrolysis time is 1min, the reduction time is 2min, the reduction rate of manganese dioxide in the roasted reduction product reaches more than 98%, and the reduction rate of ferric oxide is reduced to more than 96%.
The method can be realized by upper and lower limit values and interval values of intervals of process parameters (such as temperature, time and the like), and embodiments are not listed.
Conventional technical knowledge in the art can be used for the details which are not described in the present invention.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The device for synchronously reducing manganese-iron-containing minerals through biomass pyrolysis is characterized by comprising a furnace body (1), a pyrolysis pipe (2), a discharge pipe (4), a vertical circulating pipe (7), a material circulating pipe (10), a pyrolysis reducing pipe (13) and a biomass preheating pipe (16);
the furnace body (1) is internally provided with a pyrolysis tube (2) and a pyrolysis reduction tube (13), and the pyrolysis reduction tube (13) is sleeved in the pyrolysis tube (2); the inlet of the pyrolysis pipe (2) is connected with the outlet of the biomass preheating pipe (16), the outlet of the pyrolysis pipe (2) is connected with the inlet of the pyrolysis induced draft fan (6), the outlet of the pyrolysis induced draft fan (6) is connected with the inlet of the vertical circulating pipe (7), the outlet of the vertical circulating pipe (7) is connected with the inlet of the pyrolysis reducing pipe (13), the outlet of the pyrolysis reducing pipe (13) is connected with the inlet of the discharge pipe (4), the outlet of the discharge pipe (4) is connected with the inlet of the first-stage cyclone separator (14), the outlet of the first-stage cyclone separator (14) is connected with the inlet of the second-stage cyclone separator (15) through a pipeline, the outlet of the second cyclone separator (15) is connected with the inlet of the material circulating pipe (10), and the outlet of the material circulating pipe (10) is communicated with the inner space of the furnace body (1);
a biomass conveying mechanism (12) is arranged in the biomass preheating pipe (16), and the biomass conveying mechanism (12) is communicated with the biomass feeding hole (11);
the vertical circulating pipe (7) is also communicated with an outlet of the mineral conveying mechanism (9), and an inlet of the mineral conveying mechanism (9) is communicated with the mineral charging hole (8).
2. The apparatus for simultaneous reduction of ferromanganese-containing minerals by biomass pyrolysis according to claim 1, wherein the pyrolysis reduction tube (13) and the pyrolysis tube (2) are both spiral, and the pyrolysis reduction tube (13) is disposed in the spiral space of the pyrolysis tube (2).
3. The device for synchronously reducing manganese-iron-containing minerals through biomass pyrolysis according to claim 1, wherein the discharge pipe (4), the vertical circulating pipe (7), the material circulating pipe (10) and the biomass preheating pipe (16) are arranged outside the furnace body (1).
4. The device for synchronously reducing the ferromanganese-containing minerals through the pyrolysis of biomass as recited in claim 1, wherein there is a height difference between the first stage cyclone (14) and the second stage cyclone (15).
5. The device for synchronously reducing the ferromanganese-containing minerals through the pyrolysis of the biomass as recited in claim 1, wherein a temperature measuring element (3) is arranged in the inner space of the furnace body (1).
6. The device for synchronously reducing the manganese-iron-containing minerals through biomass pyrolysis according to claim 1, wherein a discharge induced draft fan (17) is arranged on a discharge pipe (4), and a material circulating induced draft fan (5) is arranged on a material circulating pipe (10); the top end of the furnace body (1) is provided with an exhaust pipe.
7. A method for synchronously reducing manganese-iron-containing minerals by biomass pyrolysis based on the device of any one of claims 1-6, comprising the following steps:
1) biomass enters from a biomass feed inlet (11), is preheated in a biomass preheating pipe (16), and is conveyed into a pyrolysis pipe (2) in a furnace body (1) through a biomass conveying mechanism (12); biomass is pyrolyzed in the pyrolysis pipe (2), a pyrolysis product of the biomass moves upwards under the action of a pyrolysis induced draft fan (6) and is mixed with manganese-iron-containing minerals entering through a vertical circulating pipe (7) and a mineral charging opening (8);
2) the mixture of the biomass pyrolysis product and the manganese-iron-containing mineral enters a pyrolysis reduction pipe (13) of the furnace body (1), the manganese-iron-containing mineral is reduced by the biomass pyrolysis product in the pyrolysis reduction pipe (13), and meanwhile, the biomass which is not completely pyrolyzed is pyrolyzed again and reduces the manganese-iron-containing mineral;
3) the pyrolysis reduction product enters a first-stage cyclone separator (14) and a second-stage cyclone separator (15) through a discharge pipe (4), and the reduction product of the manganese-iron-containing mineral is separated from the pyrolysis product which does not participate in reduction;
4) the pyrolysis products which do not participate in reduction are returned to the furnace body (1) for combustion and utilization through the material circulating pipe (10).
8. The method of claim 7, wherein the biomass is one or more of sawdust, straw, corncob, leaves, seaweed, sea lettuce and kelp.
9. The method of claim 7, wherein the ferromanganese-containing mineral is a deep-sea manganese oxide-containing iron oxide ore and/or a land-land manganese oxide-containing iron oxide ore.
10. The method as claimed in claim 7, wherein the preheating temperature of the biomass preheating pipe (16) is 400 ℃ and the pyrolysis temperature of the furnace body is 1200 ℃ and 400 ℃.
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