CN106675682B - A kind of dehydration upgrading of lignite prepares biomass coal technique - Google Patents
A kind of dehydration upgrading of lignite prepares biomass coal technique Download PDFInfo
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- 239000003077 lignite Substances 0.000 title claims abstract description 51
- 239000002028 Biomass Substances 0.000 title claims abstract description 49
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000018044 dehydration Effects 0.000 title claims abstract description 22
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 35
- 239000011230 binding agent Substances 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 150000001875 compounds Chemical class 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000002283 diesel fuel Substances 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 46
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 18
- 239000010902 straw Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 7
- 239000001110 calcium chloride Substances 0.000 claims description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 7
- 239000000920 calcium hydroxide Substances 0.000 claims description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 7
- 238000000354 decomposition reaction Methods 0.000 claims description 6
- 230000036961 partial effect Effects 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000003546 flue gas Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 4
- 239000008247 solid mixture Substances 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000010828 animal waste Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 238000002309 gasification Methods 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 238000010981 drying operation Methods 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000000748 compression moulding Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 11
- 235000013339 cereals Nutrition 0.000 description 6
- 239000004484 Briquette Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 241000283690 Bos taurus Species 0.000 description 3
- 241001494479 Pecora Species 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- 241000209149 Zea Species 0.000 description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 235000005822 corn Nutrition 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000010907 stover Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910002089 NOx Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention relates to a kind of dehydration upgradings of lignite to prepare biomass coal technique, and the preparation process flow is as follows: lignite and biomass are crushed by raw material crushing operation；Level-one mixing operation mixes lignite, biomass, efficient compound binder, and carries out level-one mixing；Air-flow conveys operation, and using hot air flow, it is dry with level-one to carry out second level mixing；Separation stirring operation, carries out three-level mixing using whirlwind, and separates humid air, spray diesel oil；Rotary drying operation carries out level Four mixing and secondary drying using rotating cylinder；Operations for forming, compression moulding, and packed.Biomass coal is prepared using the present invention, multilevel drying keeps lignite dehydration upgrading effect more preferable, and processing cost reduces, and multistage mixing is uniformly mixed raw material；The biomass coal of preparation has the characteristics that intensity height, good waterproof performance, transportation cost is low, gasification efficiency is high, combustion characteristics is good.
Description
Technical field
The present invention relates to lignite upgrading and Biotype coal preparation field more particularly to a kind of lignite dehydration upgrading preparation biologies
Matter briquetting process.
Background technique
Lignite is fossil resource that is abundant in the world and being widely present, and China's lignite resource reserves are quite abundant, third time
National charcoal resource investigation shows that the explored lignite reserves in the whole nation is 1311.42 hundred million tons high, accounts for about national coal reserves
13%.However it is but by itself high-moisture, high ash content, low heat value, low ash smelting point, thermal stability difference and easy weathering spontaneous combustion
The features such as influence, limit its use scope and utilization ways.And the extensive lignite of tradition in the way of (power generation) eventually
Threaten its limited Resource Properties, also can adverse condition, therefore, lignite must carry out upgrading to it before.
And biomass coal combines non-renewable fossil energy with reproducible biomass energy, has ignition point
Low, burning velocity is fast, do not smolder, can consolidate sulphur, burning sufficiently, the advantages that ash content carbon is low and not slagging.Biomass and coal
It is mixed and burned, the Energy Situation of current high-quality coal shortage of resources can be alleviated, while biomass resource can also be made full use of
Advantage reduces the discharge of coal CO2, NOx and SOx in combustion.Mixing biomass can be reduced directly by burning simultaneously
Fossil fuel and the discharge amount of carbon dioxide, sulfur and nitrogen oxides generated, the final height for realizing lignite and biomass
Clean utilization is imitated, but there is also binders to select the problems such as undesirable, raw material cannot be mixed uniformly.Due to biomass coal
Synergistic effect in possessed energy conservation and environmental protection advantage, thermal stability advantage and gasification, the life prepared with upgraded brown coal
Substance moulded coal may be implemented to be also used as gasified raw material while coal cleanliness utilizes, and realize the exploitation benefit of higher value
With.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of dehydration upgrading of lignite prepares biomass coal technique, to
Solve the problems, such as that low existing lignite dehydration efficiency, high production cost, Biomass Energy Utilization rate are low, not environmentally.
The purpose of the present invention is mainly achieved through the following technical solutions:
A kind of dehydration upgrading of lignite prepares biomass coal technique, and the preparation process flow is as follows:
S1, raw material crushing operation: carrying out broken decomposition to lignite, carries out broken decomposition to biomass；
S2, level-one mixing operation: lignite particle, biological particles are mixed with efficient compound binder, by mixture
Feed screw is fed to carry out level-one mixing and outward convey；
S3, air-flow convey operation: making to be heated to 200 DEG C of dry air in airflow pipeline using air compressor
Air-flow is formed, air-flow pushes the mixture from feed screw to carry out second level mixing in airflow pipeline and convey, together
200 DEG C of dry airs of Shi Liyong carry out level-one drying and dehydrating to mixture；
S4, separation stirring operation: the whirlwind effect generated using whirlwind bucket using air-flow is to from the airflow pipeline
The mixture that conveying comes carries out three-level mixing, and air is separated with mixture, humid air is discharged, in feed inlet with mixed material
The ratio of quality 1%-2% sprays diesel oil by nozzle；
S5, level Four mixture operation: making 6-8 ° of revolving drier inclination angle, by solid mixture and oil mixed material from turn
Cylinder higher end is passed through revolving drier, using the effect of revolving drier cylinder inner wall shovelling plate, material is taken up and falls this mistake
Cheng Shixian carries out level Four mixing to mixture, while material being promoted to move to discharge port；
S6, material secondary drying operation: simultaneously counter-current operation pair is carried out using hot-air or flue gas in revolving drier
Mixture carries out secondary drying dehydration and is conveyed outward when drying to mixture moisture is lower than 3% by band conveyor；
S7, operations for forming: using roller press type molding machine to from revolving drier conveying come mixture carry out operations for forming,
Corresponding with molding die size sieve is installed at products export, the product utilization conveyer belt that size meets send to packing machine into
Row packaging, investment rotating cylinder is processed again after the substandard product to leak down from sieve is broken.
Biomass is forest tree castoff, agricultural crop straw and the animal wastes etc. that moisture is lower than 25%；Biological particles grain
Diameter is less than or equal to 7mm, is crushed biomass using scissor-type crusher and forms.
Lignite grain diameter is 5mm, breaks grinding process for brown coal crushing by both ends using reversible counter beating hammer type disintegrator
It forms.
The raw material of efficient compound binder matches by mass percentage are as follows: biomass straw 12%, the hydrogen that concentration is 1%
Sodium hydroxide solution 100%, calcium chloride 0.5%, calcium hydroxide 0.7%, the above mass percent are molten relative to sodium hydroxide
The mass percent of liquid.
Efficient compound binder the preparation method comprises the following steps: biomass straw is broken into the particle that partial size is 3-7mm, to dense
Degree is to add broken biomass straw particle in 1% sodium hydroxide solution, and calcium chloride and calcium hydroxide is added, at 76 DEG C
Under conditions of heat the sticky mass that is obtained by filtration after 2h, as efficient compound binder.
In mixture, the mass ratio of lignite particle and biological particles is more than or equal to 7:3, is less than or equal to 8:2；Mixture
In, efficient compound binder accounts for the 10% of gross mass.
In revolving drier, air velocity 1.2-2.4m/s, rotating cylinder revolving speed is 5r/min.
Mixture after being sufficiently stirred is passed through roller press type curing formation machine in 25- using conveyer belt by operations for forming process
Cold moudling under 30MPa.
The present invention has the beneficial effect that:
In conjunction with lignite dehydration process for upgrading, compound binding agent preparation process, biomass coal preparation process and biomass
Type coal gasification advantage and independent research a set of lignite dehydration upgrading prepare the production technology of biomass coal.
The drying of lignite air-flow conveying section and two sections of combination drying section are proposed on the basis of existing lignite is dehydrated process for upgrading
It is dehydrated process for upgrading, so that dehydration upgrading effect is more preferable, processing cost is reduced；Raw material can not effectively uniformly during development of briquette
Mixing is always the limiting factor of a restriction biomass coal large-scale production, each in existing biomass coal preparation to overcome
The problem of component cannot be mixed effectively, this technique are mixed by spiral charging, air-flow conveying, whirlwind bucket material by each component raw material
It closes, four sections of mixing of mixing stirring, so that raw material is uniformly mixed, the additive components such as binder are uniformly dispersed, and briquet quality is more preferable；
Efficient compound binder is independent research preparation, and bond effect is good, ash content is low, waterproof performance is good, price is low, captured sulfur result
By force.
Other features and advantages of the present invention will illustrate in the following description, and Partial Feature and advantage are from explanation
It is become apparent in book, or understand through the implementation of the invention.The objectives and other advantages of the invention can be by being write
Specification, structure specifically noted in claims and attached drawing is achieved and obtained.
Detailed description of the invention
Fig. 1 is preparation technology flow chart according to the present invention.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention.
Raw material is chosen: the present invention is mainly cattle and sheep excrement and biomass by choosing used biomass to feedstock optimization
Stalk；
The lignite that the present invention chooses is generally high water content brown coal；
Embodiment one:
A kind of dehydration upgrading of lignite prepares biomass coal technique, prepares biomass coal step such as using the preparation process
Under:
S1, raw material crushing operation: the lignite that moisture is 30% is chosen, passes through both ends using reversible counter beating hammer type disintegrator
Broken grinding process decomposes brown coal crushing, and being crushed lignite grain diameter after decomposing is 5mm；Moisture is lower than using scissor-type crusher
25% corn stover and cattle and sheep excrement mixture carries out broken decomposition, and being crushed its grain diameter after decomposing is 7mm.
S2, level-one mixing operation: lignite particle, biological particles are mixed according to mass ratio 8:2, decompound quality
Mixture is fed feed screw progress level-one mixing and outward conveyed by 10% efficient compound binder mixing；
Separately by wheat stalk be crushed to partial size be 7mm after, with 12% mass ratio be added to concentration be 1% sodium hydroxide solution in, and
0.5% calcium chloride is added, 0.7% calcium hydroxide heats the sticky mass being obtained by filtration after 2h under conditions of 76 DEG C,
Middle mass percent is the mass percent relative to sodium hydroxide solution.
S3, air-flow convey operation: making to be heated to 200 DEG C of dry air in airflow pipeline using air compressor
Form air-flow, the air-flow pushes the mixture from feed screw to carry out second level mixing and defeated in airflow pipeline
It send, while level-one drying and dehydrating is carried out to mixture using 200 DEG C of dry airs.
S4, separation stirring operation: the whirlwind effect generated using whirlwind bucket using air-flow is to from the airflow pipeline
The mixture that conveying comes carries out three-level mixing, and air is separated with mixture, humid air is discharged, in feed inlet with mixed material
The ratio of quality 2% sprays diesel oil by nozzle.
S5, level Four mixture operation: making 6 ° of revolving drier inclination angle, by the mixed material of solid mixture and oil from rotating cylinder
Higher end is passed through revolving drier, using the effect of revolving drier cylinder inner wall shovelling plate, material is taken up and falls this process
It realizes and level Four mixing is carried out to mixture, while material being promoted to move to discharge port, rotating cylinder revolving speed is 5r/min in the step.
S6, material secondary drying operation: simultaneously counter-current operation pair is carried out using hot-air or flue gas in revolving drier
Mixture carries out secondary drying dehydration and is conveyed outward by band conveyor, the step when drying to mixture moisture is lower than 3%
Air velocity is 2m/s in rapid.
S7, operations for forming: using roller press type molding machine to from revolving drier conveying come mixture carry out operations for forming,
Corresponding with molding die size sieve is installed at products export, the product utilization conveyer belt that size meets send to packing machine into
Row packaging, investment rotating cylinder is processed again after the substandard product to leak down from sieve is broken.
Product is ellipsoid solid fuel, and average diameter 35mm, ratio of briquetting is 96% or more, compression strength 668.4N/
A, fall strength of briquette 95.6%, moisture is less than 2%.
Embodiment two:
S1, raw material crushing operation: the lignite that moisture is 30% is chosen, passes through both ends using reversible counter beating hammer type disintegrator
Broken grinding process decomposes brown coal crushing, and being crushed lignite grain diameter after decomposing is 5mm；Moisture is lower than using scissor-type crusher
25% corn stover and cattle and sheep excrement mixture carries out broken decomposition, and being crushed its grain diameter after decomposing is 7mm.
S2, level-one mixing operation: lignite particle, biological particles are mixed according to mass ratio 7:3, decompound quality
Mixture is fed feed screw progress level-one mixing and outward conveyed by 10% efficient compound binder mixing；
Separately by wheat stalk be crushed to partial size be 7mm after, with 12% mass ratio be added to concentration be 1% sodium hydroxide solution in, and
0.5% calcium chloride is added, 0.7% calcium hydroxide heats the sticky mass being obtained by filtration after 2h under conditions of 76 DEG C,
Middle mass percent is the mass percent relative to sodium hydroxide solution.
S3, air-flow convey operation: making to be heated to 200 DEG C of dry air in airflow pipeline using air compressor
Form air-flow, the air-flow pushes the mixture from feed screw to carry out second level mixing and defeated in airflow pipeline
It send, while level-one drying and dehydrating is carried out to mixture using 200 DEG C of dry airs.
S4, separation stirring operation: the whirlwind effect generated using whirlwind bucket using air-flow is to from the airflow pipeline
The mixture that conveying comes carries out three-level mixing, and air is separated with mixture, humid air is discharged, in feed inlet with mixed material
The ratio of quality 1% sprays diesel oil by nozzle.
S5, level Four mixture operation: making 8 ° of revolving drier inclination angle, by the mixed material of solid mixture and oil from rotating cylinder
Higher end is passed through revolving drier, using the effect of revolving drier cylinder inner wall shovelling plate, material is taken up and falls this process
It realizes and level Four mixing is carried out to mixture, while material being promoted to move to discharge port, rotating cylinder revolving speed is 5r/min in the step.
S6, material secondary drying operation: simultaneously counter-current operation pair is carried out using hot-air or flue gas in revolving drier
Mixture carries out secondary drying dehydration and is conveyed outward by band conveyor, the step when drying to mixture moisture is lower than 3%
Air velocity is 2m/s in rapid.
S7, operations for forming: using roller press type molding machine to from revolving drier conveying come mixture carry out operations for forming,
Corresponding with molding die size sieve is installed at products export, the product utilization conveyer belt that size meets send to packing machine into
Row packaging, investment rotating cylinder is processed again after the substandard product to leak down from sieve is broken.
Product is globular solids fuel, and average diameter 35mm, ratio of briquetting is 95% or more, and compression strength is 669.6N/,
Fall strength of briquette is 96.2%, and moisture is less than 2%.
In conclusion the embodiment of the invention provides a kind of dehydration upgradings of lignite to prepare biomass coal technique, in conjunction with brown
Coal dewatering process for upgrading, compound binding agent preparation process, biomass coal preparation process and biomass type coal gasification advantage and
The a set of lignite dehydration upgrading of independent research prepares the production technology of biomass coal.
The drying of lignite air-flow conveying section and two sections of combination drying section are proposed on the basis of existing lignite is dehydrated process for upgrading
It is dehydrated process for upgrading, so that dehydration upgrading effect is more preferable, processing cost is reduced；Raw material can not effectively uniformly during development of briquette
Mixing is always the limiting factor of a restriction biomass coal large-scale production, each in existing biomass coal preparation to overcome
The problem of component cannot be mixed effectively, this technique are mixed by spiral charging, air-flow conveying, whirlwind bucket material by each component raw material
It closes, four sections of mixing of mixing stirring, so that raw material is uniformly mixed, the additive components such as binder are uniformly dispersed, and briquet quality is more preferable；
Efficient compound binder is independent research preparation, and bond effect is good, ash content is low, waterproof performance is good, price is low, captured sulfur result
By force.
The biomass coal of preparation have intensity height, good waterproof performance, transportation cost is low, gasification efficiency is high, combustion characteristics is good
Equal many advantages, compression strength average out to 668.4N/, fall strength of briquette is averagely greater than 95.2%；Product is mainly spherical or block
Shape fuel, average diameter 35mm, ratio of briquetting is up to 95% or more, and moisture is up to 2% or less.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of lignite dehydration upgrading prepares biomass coal technique, which is characterized in that the preparation process flow is as follows:
S1, raw material crushing operation: carrying out broken decomposition to lignite, carries out broken decomposition to biomass；
S2, level-one mixture operation: lignite particle, biological particles are mixed with efficient compound binder, mixture is fed
Feed screw carries out level-one and mixes and outward convey；
S3, air-flow convey operation: forming the dry air for being heated to 200 DEG C in airflow pipeline using air compressor
Air-flow, the air-flow push the mixture from feed screw to carry out second level mixing in airflow pipeline and convey, together
200 DEG C of dry airs of Shi Liyong carry out level-one drying and dehydrating to mixture；
S4, separation stirring operation: the whirlwind effect generated using cyclone cylinder using air-flow is conveyed to from the airflow pipeline
The mixture come carries out three-level mixing, and air is separated with mixture, and humid air is discharged, and utilizes high pressure nozzle root in feed inlet
Diesel oil is sprayed according to the ratio of total quality of material 1%-2%, mixes diesel oil with solid mixture material；
S5, level Four mixture operation: making 6-8 ° of revolving drier inclination angle, by the material come out in cyclone cylinder from rotating cylinder higher end
It is passed through revolving drier, using the effect of revolving drier cylinder inner wall shovelling plate, material is taken up and falls the realization of this process to mixed
It closes material and carries out level Four mixing, while material being promoted to move to discharge port；
S6, secondary drying dewatering operation: it is carried out in revolving drier using hot-air or flue gas and counter-current operation is to mixing
Material carries out secondary drying dehydration and is conveyed outward when drying to mixture moisture is lower than 3% by band conveyor；
S7, operations for forming: using roller press type molding machine to from revolving drier conveying come mixture carry out operations for forming, producing
Sieve corresponding with molding die size is installed in product exit, and the product utilization conveyer belt that size meets, which is sent to packing machine, to be wrapped
Dress, investment rotating cylinder is processed again after the substandard product to leak down from sieve is broken；
The lignite grain diameter is 5mm, breaks grinding process for the lignite by both ends using reversible counter beating hammer type disintegrator
It is broken to form；
The raw material of the efficient compound binder matches by mass percentage are as follows: biomass straw 10-15%, concentration 1%
Sodium hydroxide solution 100%, calcium chloride 0.1-1%, calcium hydroxide 0.5-1%, the above mass percent is relative to hydrogen
The mass percent of sodium hydroxide solution；
The efficient compound binder the preparation method comprises the following steps: biomass straw is broken into the particle that partial size is 3-7mm, to dense
Degree is to add broken biomass straw particle in 1% sodium hydroxide solution, and calcium chloride and calcium hydroxide is added, at 76 DEG C
Under conditions of heat the sticky mass that is obtained by filtration after 2h, as efficient compound binder；
In the mixture, the mass ratio of lignite particle and biological particles is more than or equal to 7:3, is less than or equal to 8:2；The mixing
In material, efficient compound binder accounts for the 10% of gross mass；
In the revolving drier, air velocity 1.2-2.4m/s, rotating cylinder revolving speed is 5r/min；
Mixture after being sufficiently stirred is passed through roller press type curing formation machine in 25- using conveyer belt by the operations for forming process
Cold moudling under 30MPa.
2. lignite dehydration upgrading according to claim 1 prepares biomass coal technique, which is characterized in that the biomass
One of forest tree castoff, agricultural crop straw and animal wastes for being lower than 25% for moisture are a variety of；The biological particles
Partial size is less than or equal to 7mm, is crushed the biomass using scissor-type crusher and forms.
3. lignite dehydration upgrading according to claim 1 prepares biomass coal technique, which is characterized in that described efficiently multiple
The raw material of mould assembly binder matches by mass percentage are as follows: biomass straw 12%, the sodium hydroxide solution that concentration is 1%
100%, calcium chloride 0.5%, calcium hydroxide 0.7%, the above mass percent are the quality hundred relative to sodium hydroxide solution
Score.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610444935.8A CN106675682B (en) | 2016-06-20 | 2016-06-20 | A kind of dehydration upgrading of lignite prepares biomass coal technique |
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| CN107384495A (en) * | 2017-08-23 | 2017-11-24 | 中国矿业大学 | A kind of biomass liquefying prepares joint production process with biomass coal |
| CN108148645A (en) * | 2017-12-19 | 2018-06-12 | 中国矿业大学 | A kind of fresh straw makees the clean moulded coal preparation method of binding agent |
| CN108085081B (en) * | 2017-12-19 | 2021-01-26 | 中国矿业大学 | Preparation process of biomass briquette by taking coal slime as raw material |
| CN110540885A (en) * | 2019-09-11 | 2019-12-06 | 山西领君重工机械设备有限公司 | Drying-free forming method for molded coal |
| CN111215253B (en) * | 2020-01-22 | 2021-04-20 | 中国矿业大学 | Low-rank coal flotation reagent and flotation method |
| CN116218579B (en) * | 2023-04-24 | 2023-07-18 | 羚羊环保科技有限公司 | Desulfurization and dehydration production device for high-sulfur high-moisture lignite |
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