CN110218826A - A kind of method that biomass by hydro-thermal charcoal carries out blast furnace blowing - Google Patents
A kind of method that biomass by hydro-thermal charcoal carries out blast furnace blowing Download PDFInfo
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- CN110218826A CN110218826A CN201910631731.9A CN201910631731A CN110218826A CN 110218826 A CN110218826 A CN 110218826A CN 201910631731 A CN201910631731 A CN 201910631731A CN 110218826 A CN110218826 A CN 110218826A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/447—Carbonized vegetable substances, e.g. charcoal, or produced by hydrothermal carbonization of biomass
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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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
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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
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Manufacture Of Iron (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention belongs to technical field of blast furnace ironmaking, specifically disclose a kind of method that biomass by hydro-thermal charcoal carries out blast furnace blowing, this method solve biomass resources the blast furnace blowing process optimal utilization method the problem of, while this method can be also used for waste plastics, scrap rubber and the flammable solid waste hydro-thermal process preparation hydro-thermal charcoal efficient application of other municipal administrations in the determination of blast furnace blowing scheme.This method considers biomass by hydro-thermal charing process and biomass by hydro-thermal charcoal powder, the influence of conveying and blowing to blast furnace process key process parameter, forms the optimum utilization method that a set of biomass by hydro-thermal charcoal carries out blast furnace blowing.The present invention carries out the analysis of system for different biomass by hydro-thermal charcoals, with blast furnace process direct motion for important performance assessment criteria, realizes blast furnace safety, efficiently carries out the blowing of biomass by hydro-thermal charcoal, promote the comprehensive utilization ratio of biomass resource, reduce ironmaking production CO2Discharge amount.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, in particular to a kind of biomass by hydro-thermal charcoal carries out the side of blast furnace blowing
Method.
Background technique
Coal belongs to non-renewable resources, and exploitation and use process all have larger pollution to environment, a large amount of coal resources
Exploitation, which utilizes, has an adverse effect to the sustainable development of the environment in China, resource, economy and society.To promote ecology text
Bright construction and Green Development, country carry out macro adjustments and controls in policy level, from the control of newly-increased coal production capacity, close backward produce
Can, all-round promotion Ecological Civilization Construction and Green Development are utilized etc. to control coal total amount, development of coal clean and effective.
Iron and steel enterprise consumes coal amount close to 400,000,000 tons, 10% or more of the total consumption of coal of Zhan as coal consumption rich and influential family every year, and
It is wherein again maximum with blast furnace ironmaking process consumption coal amount accounting, it is green to promotion steel industry to reduce ironmaking production coal consumption amount
Chromogenic development has great importance.
Pulverized coal injection in blast furnace technology be blast furnace ironmaking reduce production cost, reduce the total amount of pollutant discharge important technology it
One, it is widely used at present by blast furnace ironmaking manufacturing enterprise.Advanced Coal Injection Amount into BF has reached 150- both at home and abroad at present
The level of 200kg/tHM, part blast furnace even breach 250kg/tHM, make the blast furnace ironmaking process be more than to the consumption of coal dust
The consumption of coke, has saved a large amount of high-quality coking coal resource, for promoted the competitiveness of blast furnace technology play it is important
Supporting role.Pulverized coal injection in blast furnace includes bituminous coal, anthracite, meager lean coal, upgraded coal, semi-coke, semicoke, coke powder and other at present
One of fuel containing charcoal or a variety of mixed coal powders can be used, the coal powder size for spraying into blast-furnace tuyere burning is required to be less than
The quality of pc of 0.074cm accounts for 70% or more of whole quality of pc.
China possesses biomass resource abundant, and forest and agricultural biomass year output quantity of goods produced is 20.29 hundred million tons, wherein can be used for
The quantity of goods produced of biomass production is 13.24 hundred million tons (conversion is 3.82 hundred million tons of mark coals).A kind of energy of the biomass as neutral carbon,
If the consumption that will effectively reduce steel production in blast furnace ironmaking production to coal resources can be applied it to, produced to steel is reduced
Pollutant and CO2Discharge, realize Green Development be of great significance.Common biomass mainly includes wheat, rice, jade
Rice, potato, oil plant, cotton, sugarcane and other crops residue and non-forming tree material, branch, tree after harvesting seed
Root, pericarp, fruit stone and other forestry wastes, method predominantly placement, burning, burning as its processing etc..In addition, also wrapping
Include the biomass fuel crop for the purpose of producing fuel utilization.
The constituent of biomass mainly includes cellulose, hemicellulose, lignin etc., generally existing moisture content
High, fixed carbon and the disadvantage that calorific capacity is low, energy density is not high, alkali metal content is high especially in biomass, and alkali metal pair
Blast furnace process is highly unwanted element, and biomass is caused not to be able to satisfy blast furnace blowing technical foundation performance requirement.Meanwhile biology
Common agriculture and forestry organic waste material majority has stronger toughness in matter, utilizes blast furnace ironmaking common coal pulverizer (medium-speed pulverizer, ball milling
Machine) it is difficult to be crushed to partial size less than 0.074cm.It therefore, must be first in order to produce biomass efficient applied to blast furnace blowing
By biomass upgrading technology, moisture, the volatile matter content in biomass are reduced, improves its energy density, while improving biology
The crushing performance of matter can be crushed using the existing coal pulverizer of iron-smelter, without specially purchasing biomass crusher, be saved
About cost of investment.
By biomass carry out blast furnace blowing method, have relevant report, as patent 1 (application number:
201711269435.6) a kind of biomass carbonization replaces the method in breeze blowing blast furnace, by the biomass such as stalk after drying original
Material extrusion forming obtains machine-made stick, and machine-made stick is carried out pyrolysis charring processing under the conditions of 300-1000 DEG C of temperature by retort
Powdered carbon is obtained, blast furnace is sprayed into using the powdered carbon mixed coal powder that retort obtains, reduces ironmaking coal consumption, improve production effect
Rate.Patent 2 (application number: 201080048896.0) utilization method of the biomass in blast furnace, using method for destructive distillation to biomass
Charing process is carried out, the biomass char that destructive distillation is obtained crushes together with coal dust, using crushed material as blast furnace blowing fuel from wind
Mouth is blown into blast furnace, and the method increase the calorific values of biomass, improves air stream transportation performance, can be sprayed into using existing blast furnace
Equipment.(application number: a kind of 201510451357.6) Adding Way of blast furnace blowing culled wood is firing patent 3 for culled wood
The characteristics of burning aspect of performance, by culled wood by sorting, cleaning, drying, it is broken after uses as blast furnace blowing auxiliary fuel, reality
Existing solid waste, which is concentrated, efficiently to be recycled, and the secondary pollution problem in solid waste treatment process is avoided.
Document 1 (experimental study Wuhan University Of Technology of the Li Chong peanut hull biologic charcoal as blast furnace blowing fuel, 2018)
Using agricultural biomass peanut shell as raw material, peanut shell charcoal is prepared using pyrolysis installation, by the smelting to peanut shell charcoal blast furnace blowing
Golden performance evaluation specifies that it can be as the feasibility of blast furnace blowing fuel.(Wang Peng biomass semicoke is applied to height to document 2
The basic research University of Science & Technology, Beijing of furnace blowing, 2018) pyrolysis preparation condition is had studied to the shadow of biomass semicoke metallurgical performance
Ring, systematically analyze biomass semicoke to the combustibility of coal injection, the reactivity worth of STRENGTH ON COKE, to the viscosity of clinker and
The affecting laws of blast furnace process key parameter.(the Wuhan the application study science and technology of Wang Guoqiang's blast furnace blowing agriculture and forestry organic waste material of document 3
University, 2013) using biomass straw as research object, it is calculated to blast furnace blowing by experimental study, theory analysis and model
The feasibility of reason agriculture and forestry organic waste material is inquired into, and blast furnace blowing biomass is reducing pollution and CO2Discharge aspect has obvious
Advantage.But the research of the above patent and document is largely blown limitation blast furnace the powder processed difficulty and alkali that biomass is faced
Tenor height does not provide effective solution scheme, is not directed to carry out charing process improvement to biomass using hydrothermal method
The basic property and processing performance of its pulverized coal injection also there are no the open report that biomass by hydro-thermal charcoal carries out blast furnace blowing method
Road.
In above-mentioned patent and document are recorded, blast furnace blowing biomass is had a problem in that
(1) cellulosic content is high in biomass, and when Mechanical Crushing has high power consumption, low efficiency and at high cost, and
Fiber Aspect Ratio is high in powdered biomass, and gas-solid transportation performance is poor, and when conveying is easy blocking pipeline and distributor, biomass can not
Powder, conveying and penetrating blast furnace processed are carried out using iron-smelter existing equipment；
(2) moisture and volatile matter content are high in biomass, and calorific capacity is low, and the effect of substitute for coke is poor when blast furnace blowing, together
When also will cause theoretical tuyere combustion temperature reduce, gas flowrate in bosh increase, blast furnace is normally produced and causes adverse effect；
(3) biomass pyrolytic prepares the method that biomass char carries out blast furnace blowing, can solve asking for the low and processed powder hardly possible of calorific value
Topic, but pyrolytic process will cause the enrichment of alkali metal, so that alkali metal content in biomass char is much higher than coal dust, blast furnace is largely blown
When will increase the alkali metal amount that fuel brings into, cause ore and coke degradation degree in blast furnace to deepen, influence blast furnace and normally produce.
Summary of the invention
The main purpose of the embodiment of the present disclosure is to provide a kind of method that biomass by hydro-thermal charcoal carries out blast furnace blowing, to solve
Any problem in above-mentioned and other potential problems of the prior art.
In order to achieve the above object, the embodiment of the present disclosure discloses a kind of method that biomass by hydro-thermal charcoal carries out blast furnace blowing,
This method specifically comprises the following steps:
S1 hydro-thermal charing process) is carried out to biomass and prepares biomass by hydro-thermal charcoal；
S2) mixture of the biomass by hydro-thermal charcoal and coal is carried out to be crushed powder processed, and the two is uniformly mixed；
S3) mixture after the broken mixing is conveyed and distribution system through Iron Works coal injection, by coal rifle
Blast furnace is uniformly sprayed by belly pipe and air port；
S4 after the mixture of the biomass by hydro-thermal charcoal and coal) is sprayed into blast furnace, corresponding adjustment blast furnace process air blast parameter,
To guarantee injected fuel combustion rate high before air port, suitable theoretical tuyere combustion temperature and furnace top underlining, it is ensured that
Blast furnace normally produces.
Further, S1) in biomass include agricultural wastes, forestry waste, excrement of animals, sugaring waste residue, city
What organic waste, papermaking organic sludge and other mankind generated in production and life includes cellulose, hemicellulose and wooden
The waste of element.
Further, S1) described in hydro-thermal carbonization temperature be 250-320 DEG C, the hydro-thermal carbonization time be 30-60min.
Further, S1) described in the moisture as received coal of biomass by hydro-thermal charcoal be lower than 15%, dry base Kazakhstan can grind index
(HGI) it is greater than 50, dry base high position calorific capacity (HHV) is greater than 20000kJ/kg, and dry base alkali metal content is lower than 0.4%.
Further, S1) described in biomass by hydro-thermal charcoal moisture as received coal be lower than 12wt%, HGI be greater than 60, HHV be greater than
23000kJ/kg, dry base alkali metal content are lower than 0.3wt%.
Further, S1) described in biomass by hydro-thermal charcoal moisture as received coal lower than 8%, HGI be greater than 70, HHV be greater than
26000kJ/kg, dry base alkali metal content are lower than 0.2%.
Further, S2) described in the broken powder processed of biomass by hydro-thermal charcoal and coal use iron-smelter medium-speed pulverizer, ball mill and its
Its coal pulverizer, biomass by hydro-thermal charcoal and coal are delivered to coal pulverizer by transmission belt together and carry out being crushed powder processed.The medium-speed pulverizer, ball
Grinding machine and other coal pulverizers are that iron-smelter is existing.
Further, S2) described in biomass by hydro-thermal charcoal and coal mixtures, relative to the total of biomass by hydro-thermal charcoal and coal
The percent mass ratio shared in the mixture of amount, biomass by hydro-thermal charcoal is 0.1%~60%.
Further, S2) described in biomass by hydro-thermal charcoal and being evenly mixed in shattering process for coal complete, mixed after broken
Granular mass accounting of the granularity less than 0.074mm is greater than 70% in object.
Further, S4) described in blast furnace process air blast parameter include hot blast temperature, hot wind oxygen enrichment percentage, hot wind humidity and its
It adjusts the aeration operation of blast furnace blowing fuel firing rate, theoretical tuyere combustion temperature and furnace top underlining, hot blast temperature
It is 1000-1300 DEG C, hot wind oxygen enrichment percentage volume fraction is 0.1%-20%, and hot wind water vapour content volume fraction is 0.1%-
10%.
Further, S4) described in injected fuel before air port combustion rate be greater than 60%, theoretical tuyere combustion temperature exists
Between 2000-2350 DEG C, furnace top underlining is less than 70m/min, guarantees blast fumance under the conditions of blowing biomass at high proportion
Stable smooth operation.
It is high that the method can be also used for waste plastics, scrap rubber and the flammable solid waste hydro-thermal process preparation hydro-thermal charcoal of other municipal administrations
Effect applies to the determination of blast furnace blowing scheme.
The beneficial effects of the present invention are: due to the adoption of the above technical scheme, the invention has the characteristics that
(1) improve powder processed, conveying and the jetting performance of biomass.Biomass is made by hydro-thermal charing process with toughness
Cellulosic be decomposed to form brittleness biomass by hydro-thermal charcoal, improve the milling performance of biomass, can directly be sprayed using iron-smelter
It blows coal powder manufacturing apparatus to be crushed, and realizes biomass by hydro-thermal charcoal and the mixed uniformly purpose of coal dust in shattering process, change
It has been apt to conveying and the jetting performance of fuel combination.
(2) increase the calorific capacity of biomass.Biomass by hydro-thermal carbonization process can reduce moisture and volatilization in biomass
Divide content, biomass by hydro-thermal charcoal calorific capacity has reached the level of blast furnace blowing bituminous coal, can be used as blast furnace blowing fuel meat and replace
For pulverized coal injection in blast furnace.
(3) alkali metal content in biomass is reduced.Biomass water heat treatment prepares biomass by hydro-thermal charcoal process and can reduce
Alkali metal content, elimination biomass, which is largely blown, causes blast furnace alkali load to increase considerably, and it is unfavorable to generate to blast furnace ironmaking process
It influences.
(4) promote blast fumance direct motion.In conjunction with the characteristic of biomass by hydro-thermal charcoal, Reasonable Regulation And Control air blast parameter improves air port
The combustion rate of preceding injecting mixed fuel controls reasonable theoretical tuyere combustion temperature and furnace top underlining, guarantees that blast furnace is raw
The stable smooth operation of production.
(5) present invention can promote the comprehensive utilization ratio of biomass resource, while reduce ironmaking production CO2Discharge amount,
With significant economic, society and ecological benefits.
Detailed description of the invention
Fig. 1 is the flow chart for the method that a kind of biomass by hydro-thermal charcoal of the present invention carries out blast furnace blowing.
A, biomass material, B, coking wastewater, C desalination recirculated water, D condensed water, E flash tank high pressure steam, F oil mixing with water
Object, G biomass coke tar, the thick sylvite of H, I blast furnace gas, J combustion air, K high-temp waste gas, L low temperature waste gas, M biomass by hydro-thermal charcoal,
N bituminous coal, O anthracite, the mixture of P biomass by hydro-thermal charcoal and coal, Q high pressure nitrogen；
1 pulverizer, 2 slurry storage tanks, 3 high mudjacks, 4 preheaters, 5 high temperature hydro-thermal carbonization reactions, 6 flash tank of kettle, 7 solid-liquids point
From equipment, 8 oil-water process systems, 9 combustion furnaces, 10 coal bunkers, 11 weighing belts, 12 coal pulverizers, 13 cloth bag collection machines, 14 main air drafts
Machine, 15 pulverized coal bins, 16 injection tanks, 17 pulverized coal distributors, 18 blast furnaces.
Specific embodiment
With reference to embodiments, the present invention will be described in further detail, so that advantages and features of the invention can be more
It is easy to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.Obviously, institute
The embodiment of description is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, originally
Field those of ordinary skill obtained all other embodiment without making creative work, belongs to this hair
Bright protected range.
The embodiment of the present disclosure discloses a kind of method that biomass by hydro-thermal charcoal carries out blast furnace blowing, this method specifically include with
Lower step:
S1 hydro-thermal charing process) is carried out to biomass and prepares biomass by hydro-thermal charcoal；
S2) mixture of the biomass by hydro-thermal charcoal and coal is carried out to be crushed powder processed, and the two is uniformly mixed；
S3) by S2) is broken mix after mixture conveyed through Iron Works coal injection and distribution system, passed through by coal rifle
It crosses belly pipe and air port uniformly sprays into blast furnace；
S4) corresponding adjustment blast furnace process air blast parameter, theoretical tuyere combustion temperature and furnace top underlining, it is ensured that blast furnace
The normal production of ironmaking.
According to the embodiment of the present disclosure, the S1) in biomass include agricultural wastes, forestry waste, excrement of animals,
What sugaring waste residue, organic garbage of city, papermaking organic sludge and other mankind generated in production and life include cellulose,
The waste of hemicellulose and lignin.
According to the embodiment of the present disclosure, the S1) in the processing unit (plant) of biomass by hydro-thermal charcoal be high temperature hydro-thermal carbonization reaction
Kettle, for hydro-thermal carbonization temperature between 180-320 DEG C, operating pressure is the spontaneous saturated vapor pressure of closed system, hydro-thermal carbonization time
Control is between 20-100min.
According to the embodiment of the present disclosure, the S1) in biomass by hydro-thermal charcoal moisture as received coal be lower than 15%, dry base Kazakhstan can
It grinds index HGI and is greater than 50, dry base high position calorific capacity HHV is greater than 20000kJ/kg, and dry base alkali metal content is lower than 0.4%.
According to the embodiment of the present disclosure, the S2) in biomass by hydro-thermal charcoal and coal mixtures in, relative to biomass by hydro-thermal
The percent mass ratio shared in the mixture of the total amount of charcoal and coal, biomass by hydro-thermal charcoal is 0.1%~60%.
According to the embodiment of the present disclosure, the S2) in the broken powder processed of biomass by hydro-thermal charcoal and coal use medium-speed pulverizer, ball mill
And other coal pulverizer preparations.
According to the embodiment of the present disclosure, the S2) in be crushed after in mixture granularity be less than the granular mass accounting of 0.074mm
Greater than 70%.
According to the embodiment of the present disclosure, the S4) in blast furnace process air blast parameter hot blast temperature be 1000-1300 DEG C, hot wind
Oxygen enrichment percentage volume fraction is 0.1%-20%, and hot wind water vapour content volume fraction is 0.1%-10%.
According to the embodiment of the present disclosure, the combustion rate before air port of injected fuel described in the S4 is greater than 60%, and air port is theoretical
Ignition temperature is between 2000-2350 DEG C, and furnace top underlining is less than 70m/min, to ensure that blast furnace normally produces.
Embodiment:
An embodiment of the invention is illustrated using Fig. 1.A is biomass material, B be coking wastewater, C be except
Salt recirculated water, D are condensed water, E is flash tank high pressure steam, F is oil water mixture, G is biomass coke tar, H is thick sylvite, I
For blast furnace gas, J be combustion air, K is high-temp waste gas, L is low temperature waste gas, M is biomass by hydro-thermal charcoal, N is bituminous coal, O is nothing
Bituminous coal, P are the mixture of biomass by hydro-thermal charcoal and coal, Q is high pressure nitrogen.Biomass A is crushed by pulverizer 1, is being stored up
Slurries are prepared in stock tank 2, slurrying can be one of coking wastewater B, desalination recirculated water C with water or two kinds are compared according to appropriate
Example allotment.The slurries prepared carry out pressurized delivered using high mudjack 3, right in preheater 4 to improve hydro-thermal charing efficiency
Slurries are preheated, and the slurries after preheating carry out hydro-thermal charing process into the hot carbonization reaction kettle 5 of high-temperature water by pipeline.
High temperature, high pressure slurries after completing hydro-thermal carbonization reaction are cooled down in flash tank 6, decompression is handled, the high-temperature steam of generation
Heat is provided for preheater 4, the slurries after cooling carry out the separation of hydro-thermal charcoal and liquid phase, liquid phase warp in solid-liquid separating equipment 7
8 purified treatment of oil-water process system, obtains biomass coke tar G and thick sylvite H, and demineralized water C is recycled.
Biomass by hydro-thermal charcoal M after filtering means dehydration by Belt Conveying into coal bunker 10, biomass by hydro-thermal charcoal and coal
Proportion is weighed by weighing belt 11 and is determined, is carried out in the communicated band supply coal pulverizer 12 of the mixed material P of biomass by hydro-thermal charcoal and coal
It is crushed powder processed, is stored in pulverized coal bin 15 by the mixed powder that cloth bag collection machine 13 collects obtained biomass by hydro-thermal charcoal and coal, is passed through
Injection tank 16 is delivered to the pulverized coal distributor 17 of blast furnace by high pressure nitrogen Q as carrier gas, and 18 air port of blast furnace is sprayed into after evenly distributing
Burning, provides heat and reducing agent for blast furnace process.Blast furnace gas I and combustion air J burn in combustion furnace 9, are high-temperature water
Hot carbonization reaction kettle 5 and coal pulverizer 12 provide heating and drying source.
The experiment of biomass by hydro-thermal charing is carried out using equipment shown in Fig. 1, wherein biomass uses corn stover.It is used
Industrial Analysis, the elemental analysis of biomass the results are shown in Table 1.
Table 1 gives up poplar Industrial Analysis and elemental analysis result
Corn stover in table 1 is subjected to carbonization reaction in a high pressure reaction kettle after broken slurrying, change carbonization temperature and
Carbonization time obtains corn stover hydro-thermal charcoal, carries out Industrial Analysis, elemental analysis, heat to obtained corn stover hydro-thermal charcoal
Value, Kazakhstan can grind index and alkali metal content analysis, as a result as shown in tables 2 and 3.
Table 2 gives up the Industrial Analysis of poplar hydro-thermal charcoal, elemental analysis
Table 3 give up poplar hydro-thermal charcoal Kazakhstan can grind index, calorific value and alkali metal content analysis
The hydro-thermal charing process of 180 DEG C or more progress 20min or more can be confirmed according to table 2 and table 3, it is available to receive
Base moisture content is that 50 or more, HHV is greater than 20000kJ/kg less than 13.47%, HGI, and dry base alkali metal content is lower than
0.36% corn stover hydro-thermal charcoal.
The corn stover hydro-thermal charcoal being prepared is delivered to coal bunker by conveyer belt, corn stalk is weighed by weighing belt
Stalk hydro-thermal charcoal and coal dust, the mass percent of control corn stover hydro-thermal charcoal are 30%, and coal dust HGI is determined to 75, corn stalk
In the range of 62-77, the communicated band of mixture is delivered to medium-speed pulverizer and carries out powder processed and mixed the HGI of stalk hydro-thermal charcoal and coal dust intermixture
It is even.Crushing is dried in corn stover hydro-thermal charcoal and coal dust intermixture (subsequent to be referred to as pulverized coal injection into blast furna) in medium-speed pulverizer, is
Guarantee that pulverized coal injection in blast furnace is sufficiently dry and pulverizing process safety, the temperature that medium-speed pulverizer enters dry mouth hot fume are controlled at 220 DEG C,
Less than 7%, medium-speed pulverizer unit-hour output is 25t/h for oxygen concentration control, controls coal-air ratio corn stalk in 1.5, pulverizing process
Stalk hydro-thermal charcoal and coal dust are adequately mixed.Broken pulverized coal injection into blast furna is separated by the coal dust that hot wind takes medium-speed pulverizer top to
Device, excessively thick particle is separated to be ground again, and fine-grained particles take cloth bag collection machine to by hot wind and carry out receipts powder, at this
Hot wind is also dried pulverized coal injection into blast furna in the process.
To guarantee to receive powder safety, bagroom exports oxygen concentration and requires less than 12%, the height that cloth bag collection machine is collected
Granular mass ratio of the furnace coal injection through detection granularity less than 0.074mm is 78%, and moisture content 1.6%, HHV is greater than
29500kJ/kg meets requirement of the blast furnace blowing technology to granularity and moisture content.
The pulverized coal injection in blast furnace that cloth bag collection machine is collected is stored in pulverized coal bin, coal dust storage capacity 350m3, storing coal dust amount is
180t can satisfy blast furnace 8 hours change material cycle requests.
Pulverized coal injection in blast furnace in pulverized coal bin passes through injection system and sprays into blast furnace, and injection system uses double tanks and tank discharges+
It is blown supervisor+stokehold list distributor blowing process, is blown using nitrogen pressurising, fluidisation, conveyer, pulverized coal injection in blast furnace conveying
Solid-gas ratio is 30kg (coal)/kg (nitrogen), and conveying speed is in 3.5m/s.Blowing tank volume is 30m3, storage coal dust is 15t, operation
The coal dust that main pipeline is transported to blast furnace is evenly distributed to 16 blowing branch pipes by pressure position 1.8MPa, distributor, different branch pipes it
Between error less than 3.5%.
To ensure efficient utilization of the blast furnace blowing corn stover hydro-thermal charcoal before air port, blast fumance blast temperature is 1000
DEG C, hot wind oxygen enrichment percentage volume fraction is 0.1%, and hot wind water vapour content is 1.8%.Burning of the pulverized coal injection in blast furnace before air port
Rate is detected as 60%, and theoretical tuyere combustion temperature 2000, furnace top underlining is stablized suitable in 53m/min, blast fumance
Row.
Embodiment 2
The experiment of biomass by hydro-thermal charing is carried out using equipment shown in Fig. 1, wherein biomass uses useless poplar.It is used
Industrial Analysis, the elemental analysis of biomass the results are shown in Table shown in 4.
Table 4 gives up poplar Industrial Analysis and elemental analysis result
The poplar that will give up in table 4 carries out carbonization reaction after broken slurrying in a high pressure reaction kettle, changes carbonization temperature and charcoal
Change the time, obtain biomass by hydro-thermal charcoal, Industrial Analysis, elemental analysis, calorific value, Kazakhstan are carried out to obtained useless poplar hydro-thermal charcoal
Index and alkali metal content analysis can be ground, as a result as shown in Table 5 and 6.
Table 5 gives up the Industrial Analysis of poplar hydro-thermal charcoal, elemental analysis
Table 6 give up poplar hydro-thermal charcoal Kazakhstan can grind index, calorific value and alkali metal content analysis
The hydro-thermal charing process of 180 DEG C or more progress 20min or more can be confirmed according to table 5 and table 6, it is available to receive
Base moisture content is that 52 or more, HHV is greater than 20033kJ/kg less than 14.22%, HGI, and dry base alkali metal content is lower than
0.24% useless poplar hydro-thermal charcoal.The useless poplar hydro-thermal charcoal being prepared is delivered to coal bunker by conveyer belt, passes through belt
Scale weighs useless poplar hydro-thermal charcoal and coal dust, and the mass percent for controlling useless poplar hydro-thermal charcoal is 10%, and coal dust HGI is determined to
In the range of 61-66, the communicated band of mixture is delivered to medium-speed pulverizer progress by 68, the HGI of give up poplar hydro-thermal charcoal and coal dust intermixture
Powder processed and mixing.Powder is dried in useless poplar hydro-thermal charcoal and coal dust intermixture (subsequent to be referred to as pulverized coal injection into blast furna) in medium-speed pulverizer
It is broken, to guarantee that pulverized coal injection in blast furnace is sufficiently dry and pulverizing process safety, the temperature control that medium-speed pulverizer enters dry mouth hot fume exist
250 DEG C, less than 6%, medium-speed pulverizer unit-hour output is 48t/h for oxygen concentration control, controls coal-air ratio in 1.8, pulverizing process
Useless poplar hydro-thermal charcoal and coal dust are adequately mixed.Broken pulverized coal injection into blast furna is taken to the coal dust on medium-speed pulverizer top by hot wind
Separator, excessively thick particle is separated to be ground again, and fine-grained particles take cloth bag collection machine to by hot wind and carry out receipts powder,
Hot wind is also dried pulverized coal injection into blast furna during this.To guarantee to receive powder safety, bagroom exports oxygen concentration control
System is 75% in granular mass ratio of the pulverized coal injection into blast furna Powder Particle Size less than 0.074mm that less than 11%, cloth bag collection machine is collected, water
Dividing content is that 1.4%, HHV is greater than 30200kJ/kg, meets requirement of the blast furnace blowing technology to coal powder size and moisture content.Cloth
The pulverized coal injection in blast furnace that bag powder collector is collected is stored in pulverized coal bin, coal dust storage capacity 750m3, storage coal dust amount is 380t, can be with
Meet blast furnace 8 hours change material cycle requests.Pulverized coal injection in blast furnace in pulverized coal bin sprays into blast furnace, blowing system by injection system
System is sprayed using double tanks and tank discharging+blowing supervisor+stokehold list distributor blowing process using nitrogen pressurising, fluidisation, conveyer
It blows, it is 35kg (coal)/kg (nitrogen) that pulverized coal injection in blast furnace, which conveys solid-gas ratio, and conveying speed is in 3m/s.Blowing tank volume is 60m3,
Storage coal dust is 25t, operating pressure position 1.6MPa, and the coal dust that main pipeline is transported to blast furnace is evenly distributed to 26 blowings by distributor
Branch pipe, the error between different branch pipes is less than 3%.
To ensure that blast furnace blowing gives up efficient utilization of the poplar hydro-thermal charcoal before air port, blast fumance adjustment blast temperature is
1300 DEG C, hot wind oxygen enrichment percentage volume fraction is 1.9%, and hot wind water vapour content is 1.5%.Pulverized coal injection in blast furnace is before air port
Combustion rate is detected as 67%, and theoretical tuyere combustion temperature 2167, for furnace top underlining in 59m/min, blast fumance is steady
Determine direct motion.
Embodiment 3
The experiment of biomass by hydro-thermal charing is carried out using equipment shown in Fig. 1, wherein biomass uses palm shell.It is used
The results are shown in Table 1 for Industrial Analysis, the elemental analysis of biomass.
7 palm shell Industrial Analysis of table and elemental analysis result
Palm shell in table 7 is subjected to carbonization reaction after broken slurrying in a high pressure reaction kettle, changes carbonization temperature and charcoal
Change the time, obtain biomass by hydro-thermal charcoal, Industrial Analysis, elemental analysis, calorific value, Kazakhstan are carried out to obtained palm shell hydro-thermal charcoal
Index and alkali metal content analysis can be ground, as a result as shown in Table 8 and 9.
8 palm shell hydro-thermal charcoal Industrial Analysis of table, elemental analysis
9 palm shell hydro-thermal charcoal Kazakhstan of table can grind index, calorific value and alkali metal content analysis
The hydro-thermal charing process of 180 DEG C or more progress 20min or more can be confirmed according to table 2 and table 3, it is available to receive
Base moisture content is that 50 or more, HHV is greater than 21818kJ/kg less than 11.87%, HGI, and dry base alkali metal content is lower than 0.4%
Palm shell hydro-thermal charcoal.The palm shell hydro-thermal charcoal being prepared is delivered to coal bunker by conveyer belt, is weighed by weighing belt
Biomass by hydro-thermal charcoal and coal dust, coal dust HGI are determined to 66, and the mass percent of control palm shell hydro-thermal charcoal is 60%, palm
In the range of 58-65, the communicated band of mixture is delivered to medium-speed pulverizer and carries out powder processed and mixed the HGI of shell hydro-thermal charcoal and coal dust intermixture
It is even.Crushing is dried in palm shell hydro-thermal charcoal and coal dust intermixture (subsequent to be referred to as pulverized coal injection into blast furna) in medium-speed pulverizer, to protect
Demonstrate,prove that pulverized coal injection in blast furnace is sufficiently dry and pulverizing process safety, medium-speed pulverizer enters the temperature control of dry mouth hot fume at 250 DEG C, oxygen
Less than 6%, medium-speed pulverizer unit-hour output is 42t/h for gas concentration control, controls coal-air ratio palm shell water in 1.8, pulverizing process
Hot charcoal and coal dust are adequately mixed.Broken pulverized coal injection into blast furna is taken to the coal dust classifier on medium-speed pulverizer top by hot wind,
It crosses thick particle and is separated and ground again, fine-grained particles take cloth bag collection machine to by hot wind and carry out receipts powder, in this mistake
Hot wind is also dried pulverized coal injection into blast furna in journey.To guarantee to receive powder safety, bagroom exports oxygen concentration control small
In 11%, granular mass ratio of the pulverized coal injection into blast furna Powder Particle Size that cloth bag collection machine is collected less than 0.074mm is 72%, moisture content
For 1.7%, HHV 31200kJ/kg, meet requirement of the blast furnace blowing technology to coal powder size and moisture content.Cloth bag collection machine
The pulverized coal injection in blast furnace of collection is stored in pulverized coal bin, coal dust storage capacity 750m3, storage coal dust amount is 380t, can satisfy blast furnace 8
The change material cycle request of hour.Pulverized coal injection in blast furnace in pulverized coal bin sprays into blast furnace by injection system, and injection system is using double
Tank and tank discharging+blowing supervisor+stokehold list distributor blowing process are blown, blast furnace using nitrogen pressurising, fluidisation, conveyer
It is 35kg (coal)/kg (nitrogen) that coal injection, which conveys solid-gas ratio, and conveying speed is in 3m/s.Blowing tank volume is 60m3, store coal dust
For 25t, operating pressure position 1.6MPa, the coal dust that main pipeline is transported to blast furnace is evenly distributed to 26 blowing branch pipes by distributor,
Error between different branch pipes is less than 3%.To ensure efficient utilization of the blast furnace blowing palm shell hydro-thermal charcoal before air port, blast furnace is raw
Producing adjustment blast temperature is 1200 DEG C, and hot wind oxygen enrichment percentage volume fraction is 9.8%, and hot wind water vapour content is 5.3%.Blast furnace spray
It blows combustion rate of the coal dust before air port and is detected as 87%, theoretical tuyere combustion temperature 2250, furnace top underlining exists
63m/min, blast fumance stable smooth operation.
Embodiment 4
The experiment of biomass biomass by hydro-thermal charing is carried out using equipment shown in Fig. 1, wherein biomass is trimmed using flower nursery
Object.Industrial Analysis, the elemental analysis of used biomass the results are shown in Table shown in 10.
10 flower nursery lop Industrial Analysis of table and elemental analysis result
Flower nursery lop in table 10 is subjected to carbonization reaction after broken slurrying in a high pressure reaction kettle, changes carbonization temperature
And carbonization time, flower nursery lop hydro-thermal charcoal is obtained, Industrial Analysis, element point are carried out to obtained flower nursery lop hydro-thermal charcoal
Analysis, calorific value, Kazakhstan can grind index and alkali metal content analysis, as a result as shown in table 11 and 12.
11 flower nursery lop hydro-thermal charcoal Industrial Analysis of table, elemental analysis
12 flower nursery lop hydro-thermal charcoal Kazakhstan of table can grind index, calorific value and alkali metal content analysis
The hydro-thermal charing process of 180 DEG C or more progress 20min or more can be confirmed according to table 2 and table 3, it is available to receive
Base moisture content is that 55 or more, HHV is greater than 20034kJ/kg less than 15%, HGI, and dry base alkali metal content is lower than 0.39%
Flower nursery lop hydro-thermal charcoal.The flower nursery lop hydro-thermal charcoal being prepared is delivered to coal bunker by conveyer belt, passes through belt
Scale weighs biomass by hydro-thermal charcoal and coal dust, and coal dust HGI is determined to 65, and the mass percent of control flower nursery lop hydro-thermal charcoal is
In the range of 68-71, the communicated band of mixture is delivered to middling speed by 45%, the HGI of flower nursery lop hydro-thermal charcoal and coal dust intermixture
Mill carries out powder processed and mixing.Flower nursery lop hydro-thermal charcoal and coal dust intermixture (subsequent to be referred to as pulverized coal injection into blast furna) are in medium-speed pulverizer
Crushing is dried, to guarantee that pulverized coal injection in blast furnace is sufficiently dry and pulverizing process safety, medium-speed pulverizer enter dry mouth hot fume
Temperature control is at 220 DEG C, and less than 7%, medium-speed pulverizer unit-hour output is 25t/h for oxygen concentration control, control coal-air ratio 1.5,
Flower nursery lop hydro-thermal charcoal and coal dust are adequately mixed in pulverizing process.During broken pulverized coal injection into blast furna is taken to by hot wind
The coal dust classifier on speed mill top, excessively thick particle is separated to be ground again, and fine-grained particles take cloth bag to by hot wind and receive
Powder device carries out receipts powder, and hot wind is also dried pulverized coal injection into blast furna in this process.To guarantee to receive powder safety, bagroom
Oxygen concentration control is exported less than 12%, the pulverized coal injection into blast furna Powder Particle Size that cloth bag collection machine is collected is less than the particle of 0.074mm
Mass ratio is 80%, moisture content 1.3%, HHV 28900kJ/kg, meets blast furnace blowing technology to coal powder size and moisture
The requirement of content.The pulverized coal injection in blast furnace that cloth bag collection machine is collected is stored in pulverized coal bin, coal dust storage capacity 350m3, store coal dust
Amount is 180t, can satisfy blast furnace 8 hours change material cycle requests.Pulverized coal injection in blast furnace in pulverized coal bin is sprayed by injection system
Enter blast furnace, injection system using double tanks and tank discharging+blowing supervisor+stokehold list distributor blowing process, using nitrogen pressurising,
Fluidisation, conveyer blowing, it is 30kg (coal)/kg (nitrogen) that pulverized coal injection in blast furnace, which conveys solid-gas ratio, and conveying speed is in 3.5m/s.Spray
Blowing tank volume is 30m3, storage coal dust is 15t, operating pressure position 1.8MPa, and the coal dust that main pipeline is transported to blast furnace by distributor is equal
Even to be assigned to 16 blowing branch pipes, the error between different branch pipes is less than 3.5%.To ensure blast furnace blowing flower nursery lop hydro-thermal
Efficient utilization of the charcoal before air port, it is 1150 DEG C that blast fumance, which adjusts blast temperature, and hot wind oxygen enrichment percentage volume fraction is 20%, heat
Geomantic omen vapor content is 10%.Combustion rate of the pulverized coal injection in blast furnace before air port is detected as 82%, theoretical tuyere combustion temperature
It is 2350, furnace top underlining is in 70m/min, blast fumance stable smooth operation.
The above, only of the invention illustrates embodiment, not to the present invention in any form with substantial limitation,
It should be pointed out that for those skilled in the art, under the premise of not departing from the method for the present invention, that makes several changes
It also should be regarded as protection scope of the present invention into supplement；Meanwhile all substantial technologicals according to the present invention do above-described embodiment
Any equivalent variations change, modification and differentiation, still fall within protection scope of the present invention.
Claims (9)
1. a kind of method that biomass by hydro-thermal charcoal carries out blast furnace blowing, which is characterized in that this method specifically includes the following steps:
S1 hydro-thermal charing process) is carried out to biomass and prepares biomass by hydro-thermal charcoal；
S2) mixture of the biomass by hydro-thermal charcoal and coal is carried out to be crushed powder processed, is uniformly mixed；
S3) by S2) is broken mix after mixture conveyed through Iron Works coal injection and distribution system, by coal rifle by straight
Blowpipe and air port uniformly spray into blast furnace；
S4) corresponding adjustment blast furnace process air blast parameter, theoretical tuyere combustion temperature and furnace top underlining, it is ensured that blast furnace ironmaking
Normal production.
2. the method that a kind of biomass by hydro-thermal charcoal according to claim 1 carries out blast furnace blowing, which is characterized in that described
S1 the biomass in) includes that agricultural wastes, forestry waste, excrement of animals, sugaring waste residue, organic garbage of city, papermaking have
What machine sludge and other mankind generated in production and life includes the waste of cellulose, hemicellulose and lignin.
3. the method that a kind of biomass by hydro-thermal charcoal according to claim 1 carries out blast furnace blowing, which is characterized in that described
S1 the processing unit (plant) of the biomass by hydro-thermal charcoal in) be high temperature hydro-thermal carbonization reaction kettle, hydro-thermal carbonization temperature 180-320 DEG C it
Between, operating pressure is the spontaneous saturated vapor pressure of closed system, and hydro-thermal carbonization time controls between 20-100min.
4. the method that a kind of biomass by hydro-thermal charcoal according to claim 1 carries out blast furnace blowing, which is characterized in that described
S1 biomass by hydro-thermal charcoal moisture as received coal is lower than 15wt% in), and dry base Kazakhstan can grind index HGI greater than 50, and dry base is high-order
Calorific capacity HHV is greater than 20000kJ/kg, and dry base alkali metal content is lower than 0.4wt%.
5. the method that a kind of biomass by hydro-thermal charcoal according to claim 1 carries out blast furnace blowing, which is characterized in that described
S2 in biomass by hydro-thermal charcoal in) and coal mixtures, relative to the total amount of biomass by hydro-thermal charcoal and coal, biomass by hydro-thermal charcoal
Shared percent mass ratio is 0.1%~60% in mixture.
6. the method that a kind of biomass by hydro-thermal charcoal according to claim 1 carries out blast furnace blowing, which is characterized in that the S2
The broken powder processed of middle biomass by hydro-thermal charcoal and coal uses medium-speed pulverizer, ball mill and the preparation of other coal pulverizers.
7. the method that a kind of biomass by hydro-thermal charcoal according to claim 1 carries out blast furnace blowing, which is characterized in that the S2
In) it is broken after in mixture granular mass accounting of the granularity less than 0.074mm be greater than 70%.
8. the method that a kind of biomass by hydro-thermal charcoal according to claim 1 carries out blast furnace blowing, which is characterized in that described
S4 blast furnace process air blast parameter hot blast temperature is 1000-1300 DEG C in), and hot wind oxygen enrichment percentage volume fraction is 0.1%-20%, heat
Geomantic omen vapor content volume fraction is 0.1%-10%.
9. the method that a kind of biomass by hydro-thermal charcoal according to claim 1 carries out blast furnace blowing, which is characterized in that described
S4 the combustion rate before air port of injected fuel described in) is greater than 60%, and theoretical tuyere combustion temperature is between 2000-2350 DEG C, furnace
Abdomen coal gas volume index is less than 70m/min.
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