CN107129167B - A kind of suspension catalysis oxidation flameless combustion process of the fuel containing wet biomass - Google Patents
A kind of suspension catalysis oxidation flameless combustion process of the fuel containing wet biomass Download PDFInfo
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- CN107129167B CN107129167B CN201710396568.3A CN201710396568A CN107129167B CN 107129167 B CN107129167 B CN 107129167B CN 201710396568 A CN201710396568 A CN 201710396568A CN 107129167 B CN107129167 B CN 107129167B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
- C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
- C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
- C04B7/4423—Waste or refuse used as fuel
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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
- C10L5/445—Agricultural waste, e.g. corn crops, grass clippings, nut shells or oil pressing residues
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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
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/01—Fluidised bed combustion apparatus in a fluidised bed of catalytic particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C99/00—Subject-matter not provided for in other groups of this subclass
- F23C99/005—Suspension-type burning, i.e. fuel particles carried along with a gas flow while burning
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/125—Fuels from renewable energy sources, e.g. waste or biomass
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Abstract
A kind of suspension catalysis oxidation flameless combustion process of the fuel containing wet biomass, includes the following steps: (1) modification: will contain wet biomass fuel and crush, liquid catalysis burning-rate accelerator is sprayed in crushing process or after crushing, and turn to modified fuel containing wet biomass；(2) suspension catalysis oxidation flameless combustion: the resulting modification fuel containing wet biomass of step (1) is sent into dry cement production line system in existing dore furnace, the high-temperature blower for improving dry cement production line system draws air quantity to system balancing air quantity or more, utilize the backing temperature field for drawing 840 DEG C~1200 DEG C in wind and dore furnace of system, realize the suspension catalysis oxidation flameless combustion of the modified fuel containing wet biomass, the heat for generation of burning directly feeds the decomposition of calcium carbonate in dore furnace.The present invention can be inexpensive using fuel containing wet biomass as manufacture of cement alternative fuel, and does not influence kiln system operating condition, not will cause clinker loss.
Description
Technical field
The present invention relates to a kind of combustion methods of fuel containing wet biomass, and in particular to a kind of fuel containing wet biomass hangs
Floating catalytic oxidation combustion method.
Background technique
Biomass fuel is the fourth largest source for being only second to coal, petroleum, natural gas, is occupied in entire energy resource system important
Status can be effectively protected environment using reproducible biomass fuel, but there are a large amount of crops fruit branch, straw in China every year
Stalk etc. contains wet plant fiber fuel spillage edge of a field between ground, startling, the especially annual summer harvest autumn harvest of harm resulting from
Period, due to Open Burning Crop Residue, from south to north, Dark smoke billows, air environment sharply deteriorates within the border in China, influences in one's power, high speed
Highway closing, canal suspend, forced landing elsewhere, crop straw burning cause fire suffer unexpected personal financial losses hurt sb.'s feelings lethal human life malignant event it is every
There is generation every year.
Biomass fuel burning technology using biomass energy is that biomass material is sent directly into combustion apparatus burning, utilizes combustion
The heat released during burning, or the technical method being used after biomass is first gasified or liquefied.It, can according to fuel grade
Biomass fuel burning technology is divided into the Direct-Combustion Technology of biomass and biomass and fossil fuel (coal, oil) are mixed and burned skill
Art.Biomass Direct-Combustion Technology is a kind of ancient energy conversion skill for biomass energy being converted by burning thermal energy
Art is used till today always, and with the progress of civilization and science and technology, the facility and mode of biological substance for combustion are constantly being improved, biology
Matter Direct-Combustion Technology mainly includes cooking stove combustion technology, boiler combustion technology etc..The mixed firinor fuel burning skill of biomass and coal or oil
Art is technology more popular at present, is mainly used in the burning disposal of the wastes such as house refuse at present.However, being existing
Biomass Direct-Combustion Technology or mixed combusting technology, biomass used requires first (to dry or dry through necessary drying
It is dry) it handles, the biomass after dry working process has the advantage that burning point is low, burning velocity is fast, but dries and need very big field
Ground and sunlight, it is also necessary to it is a large amount of artificial, and dry and need heat consumption and power consumption.
Currently, domestic gasification, solidification, pyrolysis and the liquid that biomass is focused primarily upon in terms of biomass combustion application study
Change etc., and a large amount of related actual items of financial support are just in an implementation, and be in progress in terms of biomass Direct-Combustion Technology
It is not very smoothly.And at abroad, gasification of biomass, liquefaction project are not too much concerned, but biomass direct-fired technology is especially
Biomass direct combustion power generation technology is in the fast-developing and quite mature using having obtained of foreign countries, because of gasification of biomass, liquefaction
External heat source and secondary energy sources electricity are needed, necessarily leads to that immediate interest can not be generated using increased costs.Biomass direct-fired technology hair
The biomass of electric treatment be largely agriculture and forestry organic waste material through dry working process, timber mill, paper mill residue etc. or its
Shaped fuel, and the special equipment for having there is different kind organism matter to burn and its application technology.Such as, specifically for burning forest industry
Steam boiler, the biomass fluidization pool furnace of obsolete material.China also starts in early 1990s to biomass fluid bed pot
The exploration of furnace, such as the series of biologic fluidized bed pot for being used to use rice hulls, sawdust biomass castoff of Harbin Institute of Technology's exploitation
Furnace also develops the grate firing type boiler for the various forestry wastes that can burn.But domestic and international all applications are all made of through xeraphium
The biomass fuel of broken processing, or through drying, crushing, processing and forming biomass molding fuel.Biomass molding fuel
There are the shapes such as rodlike, blocky and graininess.But the maximum defect of shaped fuel is difficult processing, and process equipment damage is too fast, is added
The energy consumption of work shaped fuel is high, at high cost, and smaller with air contact area when shaped fuel burning, and burn rate is slow, burning
Temperature is lower.The remaining maximum temperature for having virtue etc. to obtain in cotton stalk shaped fuel combustion experiment of China is 720 DEG C.
The drying and crushing biomass fuel or biomass molding fuel of current techniques effective use, on the one hand, dry to need
Heat consumption and power consumption and cost；On the other hand, agricultural-forestry biomass be both dried feed itself calorific value it is lower, energy density compared with
Low, burned flame temperature is lower, does not exceed 1000 DEG C generally, has both been the gas that a large amount of interior water generate contained by biomass
Also it can take away amount of heat, reduce the thermal efficiency, and, the combustion of existing cooking stove or boiler even more extremely difficult containing wet biomass combustion
Burning technology cannot effectively stable ignition burn, and here it is the processing of palpus drying and crushing or drying and crushing molding to be processed as shaped fuel
Basic reason；Secondly, dry processing or drying and moulding biomass fuel is slow compared with the burning velocity of big particle, burn-off rate is low,
Cause the thermal efficiency lower.For the combustibility for improving biomass, the experiment of Xi'an Communications University's power engineering multiphase flow state key
Room Deng Lei etc. crushes wheat stalk, rice husk and paulownia wood sawdust by the way of hot-water soak washing, is impregnated, is washed, is done
Dry equal processing, removes part objectionable impurities, to improve its application performance, but energy consumption is high, at high cost, treating capacity is limited, and objective
On cause secondary pollution.To solve the problems, such as that the burning velocity of biomass molding fuel is partially slow, coarse granule burn-off rate is low, Henan section
Skill university Wei Xue cutting edge of a knife or a sword etc. uses solid catalytic oxidant MnO2And KMnO4MnO is pressed with the stalk powder of drying and crushing2/KMnO4: straw
The mixing of stalk powder=2:1 mass ratio carries out combustion experiment, can effectively solve the problems, such as burn-off rate, reach completely burned off, and temperature of burning
Degree is up to 1000 DEG C or so, but catalyst amount is excessive (for 2 times of straw powder), does not have economy in production；University Of Xiangtan's ring
Border engineering department Luo Jie etc. is with solid oxidizer and biomass (rice bran and sawdust under 20 meshes) solid oxidizer 2 in mass ratio:
The ratio bulk testing of biomass 1 can reduce ignition temperature, improve burn-off rate, but solid oxidizer dosage is the 2 of biological quality
Times, there is no application value in industrial production.Application range, the Central China University of Science and Technology are expanded to improve the ignition temperature of biomass fuel
The research that biomass high temperature combustion technology has carried out biomass micron fuel calcining cement is developed, selection is ground to particle size range
Sawdust biomass micron fuel cyclone firing technical method between 80-160 mesh (177um-100um) (is similar to whirlwind to fire
Burning boiler technology), biomass fuel is made in sawdust powder of the particle size range between 80-160 mesh (177um-100um), with this
Biomass combustion temperature is increased to 1385 DEG C by the cyclone-burning method of biomass micron fuel, greatly improves broken biology
The combustion state and efficiency of combustion of matter, improve the grade of biomass fuel.And in the experiment of powder fuel cyclone-burning method
It was found that partial size is difficult to light greater than the powder of 0.465mm in combustion, do not occur preferably flashing over and it is lasting, stablize
The phenomenon that burning, the higher burning of CO content in smoke is insufficient, and the ash content dropped out in deduster in combustion process is in black, burner hearth
Temperature is unstable.The research achieves significant achievement, but biomass powder is broken to 20 mesh are highly difficult and energy consumption is very high, crushes
To 80-160 mesh powder be placed on industrial production application in lack feasibility.
On the other hand, manufacture of cement is one of greenhouse gases maximum emission source in the world, accounts for about the 5% of Global emissions total amount,
The major issue of World Focusing is had become using alternative fuel.Today, cement plant biomass burning and other waste technologies
Quite mature in some countries, especially developed country, such as extra large Dell of Germany wins lattice Cement Group with public by profession
The animal feed of the dry processing of department or drying and moulding processing, the sludge in urban groundwater, discarded paper, damaged tire, waste plastics,
Waste wood and lubricating oil are as alternative fuel, and highest substitution rate is up to 83.9%.
China is cement maximum production capacity state, the world, and cement industry is one of the key industry of China's energy-saving and emission-reduction, utilizes life
It is one of development trend of cement industry that the substance energy, which replaces coal,.Biomass energy is exactly that solar energy is stored in the form of chemical energy
Form of energy in biomass is a kind of renewable energy and a kind of reproducible carbon source.China's annual output exceedes 1,000,000,000 tons
Plant fiber such as crops fruit branch, stalk be exactly biomass energy, the carbon dioxide that it is discharged in combustion with its life
The carbon dioxide absorbed when long reaches Carbon balance, is identified as having the characteristics that carbon dioxide zero discharge.For this purpose, domestic section skilled worker
Author has carried out a large amount of research and practice.As " agricultural crop straw was burned in cement and substituted " Shanghai building materials " (the 2nd phase in 2014)
Critical issue in fuel applications is inquired into " Cement Co., Ltd. of Shanghai Building Material Group Lu Bo etc. is described, with the straw of collection
Stalk is delivered to processing and forming factory, straw briquette fuel is made through drying, crushing, curing molding, and design with Tianjin cement industry
The cooperation of Co., Ltd, research institute, increases outside the kiln tower of new type nonaqueous cement production line at a set of fluidized bed calciner collaboration
Waste is managed, which by normal new dry process Calciner Design, does not increase tower inner area suitably
(a large amount of air hose blast cap is arranged in furnace bottom in tower), tertiary air is blasted from furnace bottom, and the straw briquette fuel after metering feeds people's fluidization
Dore furnace burns.Fluidized bed calciner, which is equipped with, feeds device for coal, the tertiary air mixing after-combustion that coal dust enters with furnace bottom, in-furnace temperature
Generally at 850 DEG C~900 DEG C.The project achieves good emission reduction effect to form a part of fire coal of stalk fuel substitution, often
1.5 tons of alternative 1 ton of fire coals of molding stalk fuel, but there are problems that following main problem: first is that drying cost, is dried using fuel
It is dry then without economy, can only manually dry, no matter from using or considering from dehydration, the utilization of stalk fuel requires very big
Storage land used, seasonal, land occupation, dehydration, the very important problem of anti-igneous；Second is that the molding equipment abrasion of processing
Fastly, power consumption is high；Third is that the mixed firinor fuel burning speeds match of molding stalk fuel and coal dust in special fluidized bed type dore furnace
Difference increases system operatio difficulty；Fourth is that the factors such as potassium, chlorinity height produce influence to the stability of kiln system operating condition, visitor
Clinker loss is caused in sight.For another example " cement " (2016.No.1) " industry examination of the biomass fuel applied to cement kiln
Test " Hebei Jinyu Ding Xin Cement Co., Ltd Han Yong roc etc. is described using furfural dregs as biomass fuel, by furfural dregs grinding
Afterwards by 0.08mm square hole screen, examination burns down full tail-off time about 60min, then, by the 3%~5% of pulverized coal consumption, by levigate chaff
Aldehyde slag is added in the kiln tail smoke-box of new type nonaqueous cement production line and burns, and additional amount can guarantee water when being no more than the 3% of pulverized coal consumption
Stall system continuous operation, kiln unit-hour output decrease.Although this method can cooperate with processing biomass-furfural dregs, processing
It measures limited, and objectively affects kiln system operating condition, reduce clinker.
CN104428397A, Kloeckner Humboldt Wedag provide a kind of in the facility of production cement
The method and corresponding facility, method for handling biomass are the waste heat that cement preheater system is utilized using heat-exchanger rig
Can, dry wet agricultural biomass is simultaneously carbonized in the reactor, then using biomass that is dry and being carbonized as fuel.This method
Investment is big, and exchanges heat to be also easy to produce secondary pollution in desiccation, carbonisation, is not suitable for China's national situation.
CN105829262A, E. I. Du Pont de Nemours and Co provide a kind of lignocellulose biomass fermentation for cement kiln
The joint product fuel of process, method are the waste wood that lignocellulose biomass is mentioned to alcohol generation with alcohol inulinase fermentation process
Matter cellulose cake and lignocellulosic syrup are raw material, then by lignocellulosic filter cake and lignocellulosic syrup by certain
Ratio remix, then will mixture it is dry after be used as fuel, for burning in cement kiln.But this mixture energy consumption for drying
Height dries the CO that required energy consumption generates during biomass fuel is made2With the emission reduction CO of this biomass fuel2Amount is suitable.
Furthermore due to still lacking completely new biomass combustion technical method, in current China's policy and environmental protection standard,
Direct biomass burning belongs to high pollution fuel, only allows to use in the brick kitchen range in rural area, does not allow to use in city.Biology
The application of matter fuel, practical is mainly biomass molding fuel, by crushing, mixing, is squeezed using agricultural waste as raw material
A kind of Novel clean-fuel that can directly burn of various moldings (such as blocky, graininess) is made in the techniques such as pressure, drying.Visitor
Viewpoint says that it is energy consumption in the process such as drying, molding that this Novel clean-fuel, which is clean for using unit,
, have a discharge, and almost quite or be in same in the energy quantity of the energy consumed by its process and its clean fuel
On one order of magnitude.Therefore, the application of the biomass energy especially plant fiber fuel of partial fuel coal is substituted for cement production enterprise,
There is an urgent need to a kind of completely new technical methods so that processed and applied energy consumption containing wet plant fiber fuel and cost and just is effectively reduced
In the stabilization for realizing kiln system operating condition.
Summary of the invention
The technical problem to be solved by the present invention is to, it overcomes the deficiencies of the prior art and provide one kind and is not necessarily to dry, molding,
Can be inexpensive using fuel containing wet biomass as manufacture of cement alternative fuel, and kiln system operating condition, Bu Huizao are not influenced
The suspension catalytic oxidation combustion method of the fuel containing wet biomass of ripe material production loss.
The technical solution adopted by the present invention to solve the technical problems is: a kind of suspension catalysis oxygen of the fuel containing wet biomass
Change combustion method, includes the following steps:
(1) modification: will contain wet biomass fuel and crush, and liquid catalytic combustion-supporting is sprayed in crushing process or after crushing
Agent turns to modified fuel containing wet biomass；
(2) the resulting modification fuel containing wet biomass of step (1) suspension catalysis oxidation flameless combustion: is sent into cement produced with the dry method
On line production system in existing dore furnace, the high-temperature blower for improving dry cement production line system draws air quantity to system balancing wind
More than amount, utilize 840 DEG C in the drawing wind and dore furnace of system (840~900 DEG C of dore furnace edge)~1200 DEG C of (dore furnace centers
1100~1200 DEG C) backing temperature field, realize that the suspension catalysis oxidation flameless combustion of the modified fuel containing wet biomass, modification contain
The heat that wet biomass fuel suspension catalysis oxidation flameless combustion generates directly feeds the decomposition of calcium carbonate in dore furnace.
Further, in step (1), the fuel containing wet biomass be containing wet plant fiber fuel, refer to agriculture, woods, herd,
That cures that the industries such as (Chinese medicine) generate is as the main component containing wet material or waste with natural plant fibre, as gardens fruit branch,
Stalk etc..
Further, in step (1), by fuel containing wet biomass with shear/grinding method crushes as the object of 1~50mm of size
Material.
Further, in step (1), the liquid catalysis burning-rate accelerator of sprinkling accounts for 0.05~2% of the fuel mass containing wet biomass.
Further, in step (1), the liquid catalysis burning-rate accelerator, which refers to, can effectively facilitate fuel-pyrolysis containing wet biomass
Oxidation, the substance for improving oxidation rate are commercially available product or commercially available raw material such as ammonium dichromate, ammonium metavanadate, ferric acid
Aqueous solution made of one or more of potassium, lithium perchlorate, cerous nitrate, nickel nitrate, lithium nitrate etc..
Further, in step (2), modified fuel containing wet biomass can be simultaneously from top/middle part/lower part many places of dore furnace
Dispersion is distributed into dore furnace, or part is distributed into the gooseneck at the top of dore furnace, but cannot be sent from the tapering of dore furnace or bottom
Enter, to ensure that the fuel containing wet biomass being sent into dore furnace is in suspended state.
Technical principle of the invention:
1) advantage for borrowing catalytic oxidation combustion, catalytic combustion-supporting substance is directly adsorbed on fuel containing wet biomass, in
Higher than the backing temperature field of 800 DEG C (in dore furnace 840 DEG C~1200 DEG C), the flame retardancy problem of the fuel containing wet biomass is resolved
The slow problem with burning velocity enables fuel containing wet biomass efficiently to crack and quickly oxidation after-flame releases thermal energy.
2) preferably, with the efficient and energy-efficient shearing of maturation application and/or grinding grinding mode, wet biomass combustion will be contained
The broken material for size 1mm~50mm of feed powder, had both created condition for the modification of material, also for enter dore furnace in after by drawing wind
It forms the flameless combustion of suspended state catalysis oxidation and creates condition.And while meeting application, a large amount of dry energy is saved
Consumption and cost, reduce the power consumption of polymer processing of the fuel containing wet biomass to the maximum extent, reduce processing cost to the maximum extent.
It 3) had both been to be completely dried that be compressed to shaped fuel its calorific value still more coal-fired for most of fuel containing wet biomass
To be low, the flame temperature of necessary 1650 DEG C of firing temperature of 1450 DEG C of material or more in kiln is much not achieved in ignition temperature, but can
Reach 850 DEG C or more in dore furnace of Decomposition of Calcium Carbonate temperature, and by modified fuel applications containing wet biomass in dore furnace internal combustion
Burn heat supply.And using high concentration high temperature suspension powder environment in dore furnace, the catalysis of the modified fuel-efficient containing wet biomass is realized
Cracking and quickly oxidation flameless combustion, the thermal energy of flameless combustion directly transmit the decomposition of supply calcium carbonate.
4) air quantity to system balancing air quantity or more is drawn with the high-temperature blower for improving dry cement production line system, eliminated containing wet
Adverse effect of the moisture of biomass fuel to kiln system, it is ensured that using fuel containing wet biomass as when alternative fuel,
The yield and heat consumption of kiln system are unaffected, economical.
Beneficial effects of the present invention:
1) method is simple, and industrial application takes up little area, it is small to invest, and has the equipment of more mature application can be selected, convenient for pushing away
Extensively.
2) energy consumption and environmental pollution in biomass economy process can be effectively reduced, is subtracted conducive to environmental protection and energy conservation
Row.
3) a kind of economic and practical method is provided using alternative biomass energy for cement production enterprise, has both been conducive to cement and has looked forward to
Industry energy-saving and emission-reduction and cost efficiency are also conducive to problem of environmental pollution caused by solving biomass on-site incineration.
Specific embodiment
The invention will be further described with reference to embodiments.
Embodiment 1
Implement on certain φ 3.5x54m dry cement production line, selects local vineyard trimming containing wet plant fiber material
The fruit branch thrown aside, detects moisture content 27.4%, dry base heat value 3317kcal/kg, and catalysis burning-rate accelerator selects Hunan Province little Yin Wuji ring
The ZC-27 type liquid catalysis burning-rate accelerator of border energy science and technology development corporation, Ltd., includes the following steps:
(1) modification: by containing wet fruit branch directly using shear crusher crushing as the material of 3~30mm of size, in powder
Sprinkling accounts for the ZC-27 type liquid catalysis burning-rate accelerator containing wet fruit branch quality of material 0.2% during broken, turns to modified containing wet fruit branch
Fuel；
(2) suspension catalysis oxidation flameless combustion: will be modified existing from dry cement production line system containing wet fruit branch fuel
Dore furnace lower part and middle part be sent into dore furnace simultaneously respectively, the high-temperature blower for improving system draws air quantity to system balancing wind
More than amount, keep the dynamic stability of kiln system, using 870 DEG C in the drawing wind and dore furnace of system (870 DEG C of dore furnace edge~
890 DEG C)~backing the temperature field at 1200 DEG C (1100~1200 DEG C of dore furnace center), realize the modified suspension containing wet fruit branch fuel
Catalysis oxidation flameless combustion, the modified heat generated containing wet fruit branch fuel suspension catalysis oxidation flameless combustion directly feed dore furnace
The decomposition of interior calcium carbonate.
It is stepped up the modified dosage containing wet fruit branch fuel, gradually reduces tail coal dosage, synchronous dynamic adjusts system high temperature
The drawing air quantity of blower maintains balance air quantity or more, until replacing the 50% of kiln system tail coal dosage, continuous 15 hours 50%
Tail coal substitution is measured to containing wet fruit branch fuel and is finished, and the stable conditions of kiln system operation, raw material inventory increases 8%(, that is, clinker
Increase by 8%), limpid in kiln, clinker knot graininess is good.Take test section clinker sample detection clinker physical and mechanical property indexs suitable.
Test result shows to implement to discard fruit branch containing wet vineyard and directly be modified as biomass substitute fuel containing wet plant
The suspension catalysis oxidation flameless combustion process of fibres fuel is feasible.
Embodiment 2
Implement on certain φ 4x64m dry cement production line, local broomcorn straw, inspection are selected containing wet plant fiber material
Moisture content 26.2%, dry base heat value 3632kcal/kg are surveyed, catalysis burning-rate accelerator selects Hunan Province little Yin Wuji environmental energy science and technology to open
The ZC-29 type liquid catalysis burning-rate accelerator for sending out Co., Ltd, includes the following steps:
(1) modification: by containing wet broomcorn straw directly using shear crusher crushing as the material of 10~30mm of size,
Sprinkling accounts for the ZC-29 type liquid catalysis burning-rate accelerator containing wet broomcorn straw quality of material 0.5% after crushing, turns to modified containing wet height
Fine strain of millet stalk fuel；
(2) suspension catalysis oxidation flameless combustion: contain wet broomcorn straw fuel from dry cement production line system for modified
The middle part of existing dore furnace is sent into dore furnace, and the high-temperature blower for improving system draws air quantity to system balancing air quantity or more, is protected
The dynamic stability for holding kiln system, using 880 DEG C in the drawing wind and dore furnace of system (880 DEG C~895 DEG C of dore furnace edge)~
The modified suspension catalysis containing wet broomcorn straw fuel is realized in the backing temperature field at 1200 DEG C (1100~1200 DEG C of dore furnace center)
Flameless combustion is aoxidized, the modified heat generated containing wet broomcorn straw fuel suspension catalysis oxidation flameless combustion directly feeds dore furnace
The decomposition of interior calcium carbonate.
It is stepped up the modified dosage containing wet broomcorn straw fuel, gradually reduces tail coal dosage, synchronous dynamic adjusts system
The drawing air quantity of high-temperature blower maintains balance air quantity or more, until replacing the 55% of kiln system tail coal dosage, continuous 8 hours 55%
Tail coal substitution measure to being finished containing wet broomcorn straw fuel, the stable conditions of kiln system operation, raw material inventory increases 5%(, that is, ripe
Expect 5%) yield increases, limpid in kiln, clinker knot graininess is good.Test section clinker sample is taken to detect clinker physical and mechanical property indexs phase
When.
Test result shows to implement to be directly modified as biomass fuel containing wet broomcorn straw containing wet plant fiber fuel
Suspension catalysis oxidation flameless combustion process be feasible.
Embodiment 3
Implement on certain φ 3x46m dry cement production line, local straw is selected containing wet plant fiber material, detection contains
Water rate 45.7%, dry base heat value 3078kcal/kg, catalysis burning-rate accelerator select the environmental energy scientific and technological development of Hunan Province little Yin Wuji to have
The ZC-27 type liquid catalysis burning-rate accelerator of limit company, includes the following steps:
(1) modification: by containing wet straw directly using shear crusher crushing as the material of 5~50mm of size, in powder
Sprinkling accounts for the ZC-27 type liquid catalysis burning-rate accelerator containing wet straw quality of material 0.8% during broken, turns to modified containing wet straw
Fuel；
(2) suspension catalysis oxidation flameless combustion: will be modified existing from dry cement production line system containing wet straw fuel
Dore furnace lower part and middle part be sent into dore furnace simultaneously respectively, the high-temperature blower for improving system draws air quantity to system balancing wind
More than amount, keep the dynamic stability of kiln system, using 870 DEG C in the drawing wind and dore furnace of system (870 DEG C of dore furnace edge~
890 DEG C)~backing the temperature field at 1200 DEG C (1100~1200 DEG C of dore furnace center), realize the modified suspension containing wet straw fuel
Catalysis oxidation flameless combustion, the modified heat generated containing wet straw fuel suspension catalysis oxidation flameless combustion directly feed dore furnace
The decomposition of interior calcium carbonate.
It is stepped up the modified dosage containing wet straw fuel, gradually reduces tail coal dosage, synchronous dynamic adjusts system high temperature
The drawing air quantity of blower maintains balance air quantity or more, until replacing the 30% of kiln system tail coal dosage, continuous 24 hours 30%
Tail coal substitution is measured to containing wet straw fuel and is finished, and the stable conditions of kiln system operation, raw material inventory increases 7%(, that is, clinker
Increase by 7%), limpid in kiln, clinker knot graininess is good.Take test section clinker sample detection clinker physical and mechanical property indexs suitable.
Test result shows to implement to be directly modified as biomass substitute fuel containing wet straw containing wet plant fiber fuel
Suspension catalysis oxidation flameless combustion process be feasible.
Embodiment 4
Implement on certain φ 4x64m dry cement production line, local straw is selected containing wet plant fiber material, detection contains
Water rate 32.4%, dry base heat value 3186kcal/kg, catalysis burning-rate accelerator select commercially available lithium perchlorate, metavanadic acid ammonia and cerous nitrate to press
The ratio of mass ratio 1:1:1 is dissolved in water and saturated solution is made, and includes the following steps:
(1) it modification:, directly using shear crusher crushing as the material of 3~30mm of size, will be crushed containing wet straw
Sprinkling accounts for the catalysis burning-rate accelerator containing wet straw quality of material 1% afterwards, turns to modified containing wet straw fuel；
(2) suspension catalysis oxidation flameless combustion: will be modified existing from dry cement production line system containing wet straw fuel
Dore furnace lower part and middle part be sent into dore furnace simultaneously respectively, the high-temperature blower for improving system draws air quantity to system balancing wind
More than amount, keep the dynamic stability of kiln system, using 870 DEG C in the drawing wind and dore furnace of system (870 DEG C of dore furnace edge~
895 DEG C)~backing the temperature field at 1200 DEG C (1100~1200 DEG C of dore furnace center), realize the modified suspension containing wet straw fuel
Catalysis oxidation flameless combustion, the modified heat generated containing wet straw fuel suspension catalysis oxidation flameless combustion directly feed dore furnace
The decomposition of interior calcium carbonate.
It is stepped up the modified dosage containing wet straw fuel, gradually reduces tail coal dosage, synchronous dynamic adjusts system high temperature
The drawing air quantity of blower maintains balance air quantity or more, until replacing the 40% of kiln system tail coal dosage, continuous 8 hours 40% tails
Coal substitution is measured to containing wet straw fuel and is finished, and the stable conditions of kiln system operation, raw material inventory increases 6%(, that is, clinker and increases
Add 6%), limpid in kiln, clinker knot graininess is good.Take test section clinker sample detection clinker physical and mechanical property indexs suitable.
Test result shows to implement hanging containing wet plant fiber fuel to be directly modified containing wet straw as biomass fuel
Floating catalysis oxidation flameless combustion process is feasible.
Embodiment 5
Implement on certain φ 3.5x54m dry cement production line, selects local food market discarded containing wet plant fiber material
Vegetables and fruits, detect moisture content 51.7%, dry base heat value 2976kcal/kg, and catalysis burning-rate accelerator selects Hunan Province little Yin Wuji environmental energy
The ZC-27 type liquid catalysis burning-rate accelerator of Science and Technology Development Co., Ltd., includes the following steps:
(1) modification: will directly be crushed containing wet discarded vegetables and fruits with grinding type crusher as the material of 1~20mm of size,
Sprinkling accounts for the ZC-27 type liquid catalysis burning-rate accelerator containing wet discarded vegetables and fruits quality of material 1.2% in crushing process, and homogenizing is modified as
Containing wet discarded vegetables and fruits fuel；
(2) suspension catalysis oxidation flameless combustion: contain wet discarded vegetables and fruits fuel from dry cement production line system for modified
The middle part of existing dore furnace and top are sent into dore furnace, improve system high-temperature blower draw air quantity to system balancing air quantity with
On, the dynamic stability of kiln system is kept, is utilized 880 DEG C in the drawing wind and dore furnace of system (880 DEG C~900 DEG C of dore furnace edge)
The backing temperature field at~1200 DEG C (1100~1200 DEG C of dore furnace center) realizes that the modified suspension containing wet discarded vegetables and fruits fuel is urged
Change oxidation flameless combustion, the modified heat generated containing wet discarded vegetables and fruits fuel suspension catalysis oxidation flameless combustion directly feeds decomposition
The decomposition of calcium carbonate in furnace.
It is stepped up the modified dosage containing wet discarded vegetables and fruits fuel, gradually reduces tail coal dosage, synchronous dynamic adjusts system
The drawing air quantity of high-temperature blower maintains balance air quantity or more, until replacing the 18% of kiln system tail coal dosage, continuous 3 hours 18%
Tail coal substitution measure to being finished containing wet discarded vegetables and fruits fuel, the stable conditions of kiln system operation, raw material inventory increases 3%(, that is, ripe
Expect 3%) yield increases, limpid in kiln, clinker knot graininess is good.Test section clinker sample is taken to detect clinker physical and mechanical property indexs phase
When.
Test result shows to implement to be directly modified as biomass substitute fuel containing wet discarded vegetables and fruits containing wet plant fiber
The suspension catalysis oxidation flameless combustion process of fuel is feasible.
Claims (7)
1. a kind of suspension catalytic oxidation combustion method of fuel containing wet biomass, which comprises the steps of:
(1) modification: will contain wet biomass fuel and crush, and liquid catalysis burning-rate accelerator be sprayed in crushing process or after crushing,
Turn to modified fuel containing wet biomass；
(2) the resulting modification fuel containing wet biomass of step (1) suspension catalysis oxidation flameless combustion: is sent into cement produced with the dry method production
Linear system is united in upper existing dore furnace, improve dry cement production line system high-temperature blower draw air quantity to system balancing air quantity with
On, using the backing temperature field for drawing 840 DEG C~1200 DEG C in wind and dore furnace of system, realize the modified fuel containing wet biomass
Suspension catalysis oxidation flameless combustion, the heat that the modified suspension of fuel containing wet biomass catalysis oxidation flameless combustion generates are directly fed
The decomposition of calcium carbonate in dore furnace.
2. the suspension catalytic oxidation combustion method of the fuel according to claim 1 containing wet biomass, which is characterized in that step
(1) in, the fuel containing wet biomass be containing wet plant fiber fuel, refer to agriculture, woods, herd, cure that industry generates with natural
Plant fiber is as the main component containing wet material.
3. the suspension catalytic oxidation combustion method of the fuel according to claim 1 or 2 containing wet biomass, which is characterized in that
In step (1), by fuel containing wet biomass with shear/grinding method crushes as the material of 1~50mm of size.
4. the suspension catalytic oxidation combustion method of the fuel according to claim 1 or 2 containing wet biomass, which is characterized in that
In step (1), the liquid catalysis burning-rate accelerator of sprinkling accounts for 0.05~2% of the fuel mass containing wet biomass.
5. the suspension catalytic oxidation combustion method of the fuel according to claim 1 or 2 containing wet biomass, which is characterized in that
In step (1), the liquid catalysis burning-rate accelerator, which refers to, can effectively facilitate fuel-pyrolysis containing wet biomass and oxidation, improve oxidation
The substance of speed.
6. the suspension catalytic oxidation combustion method of the fuel according to claim 5 containing wet biomass, which is characterized in that described
Liquid catalysis burning-rate accelerator be ammonium dichromate, ammonium metavanadate, potassium ferrate, lithium perchlorate, cerous nitrate, nickel nitrate, lithium nitrate
Aqueous solution made of one or more.
7. the suspension catalytic oxidation combustion method of the fuel according to claim 1 or 2 containing wet biomass, which is characterized in that
In step (2), modified fuel containing wet biomass is distributed into dore furnace from top/middle part of dore furnace/lower part many places dispersion simultaneously,
Or part is distributed into the gooseneck at the top of dore furnace, but cannot be sent into from the tapering of dore furnace or bottom, is decomposed with ensuring to be sent into
Fuel containing wet biomass in furnace is in suspended state.
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