CN102703155A - Biomass fuel based on sludge, straw and raw coal, preparation method of biomass fuel and application of fuel slag - Google Patents
Biomass fuel based on sludge, straw and raw coal, preparation method of biomass fuel and application of fuel slag Download PDFInfo
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a biomass fuel based on sludge, straw and raw coal, a preparation method of the biomass fuel and application of a fuel slag, and belongs to the field of resource utilization of solid waste. The biomass fuel is formed by mixing, pressing and molding the sludge, the straw and the raw coal; and the weight ratio of the sludge, the straw and the raw coal is (1-3): (1-3): 3. The preparation method comprises the following steps of: adding limestone to the dehydrated sludge subjected to application of an aluminum coagulant, wherein the mass percentage of the limestone in the sludge is 1 to 3 percent; mixing the sludge and the straw to aerobically compost; mixing the raw coal with the mixture of sludge and straw, pressing and molding to obtain the biomass fuel. After the biomass fuel disclosed by the invention is burnt, the maximum absorption capacity of the slag exceeds 25g/Kg and can be used as substitutes of filler materials for artificial wetlands. According to the biomass fuel based on sludge, straw and raw coal, the preparation method of the biomass fuel and the application of the fuel slag, water in the raw material can be hydrated quickly, heavy metals can be passivated, the emission of SO2 in combustion of the raw coal can be reduced, and the burnt slag of the biomass fuel has high contents of calcium, aluminum and Ferrum with strong absorption capacity to phosphor and can be used as a phosphorus removing agent during sewage treatment.
Description
Technical field
The invention belongs to environment protection class solid waste resource recovery and utilize technical field, more particularly, relate to a kind of biomass fuel based on mud-stalk-raw coal and preparation method thereof, and the application of slag behind this biomass fuel combustion.
Background technology
The raising day by day of the urban operating mechanism service level of modern city and the increase of urban population make that the quantity discharged of city domestic sewage is also increasing, cause in the municipal sewage treatment process, producing a large amount of mud.Sewage sludge is a kind of heterogeneous body of being made up of organic relic, mikrobe, inorganic particle, colloid etc.; Mud contains toxic organic compound, pathogenic microorganism and heavy metal; Can produce serious harm to environment; Along with the rapid increase of sludge yield, the disposal of mud more and more receives people's attention.
An urgent demand of the environment and the energy makes the investigator begin to pay attention to the processing to mud, and normal employing burning and pyrolysis come it is handled.Because the calorific value of pure mud is lower, directly it being acted as a fuel both is difficult for stable burning, and the heat that burning produces also is difficult to satisfy the demand of Industrial Boiler heat supply and generating.Through mud and coal being mixed with this, both can reach the purpose of protection environment, the reasonable approach of opened up a save energy simultaneously again, increasing economic efficiency as a kind of fuel.
Data by MoM and MEI such as sludge incineration and compost has outstanding advantage: burning can significantly reduce the volume and weight (burning the back volume can reduce more than 90%) of mud; Thereby seldom there is not the problem of heavy metal ion in the material of ultimate demand processing; Sometimes burning ash and can be made into useful product, is relatively safe a kind of sludge disposal mode; The speed of sludge treatment is fast, and floor space is little, does not need standing storage; But the mud on-site incineration does not need long-distance transportation; Can be used for heat supply or generating by recovered energy; Adopt advanced burning facility can realize very low secondary pollution or the like.Sludge incineration is the sludge treatment mode of " thoroughly ", use in developed countries such as Europe, the U.S., Japan more, outstanding feature such as it is fast with processing speed, and the minimizing degree is high, reusing of energy source and being celebrated.
Because contain abundant organism in the mud, itself just has certain calorific value, therefore mud is mixed with coal that to carry out that mixed firing is used to generate electricity be the focus that sludge incineration is studied.Mud mixed firing is meant mud mixed with other combustiblematerials burns, and has both made full use of the calorific value of mud, has reached the purpose of saving the energy again.The blending objects of mud is mainly fire coal, flammable solid wastes straw etc.
One Chinese patent application CN 201010169094.7; The applying date is on May 14th, 2010; Invention and created name is: straw composite fuel method of manufacture and straw composite fuel; Stalk, coal dust raw material and the paper mill sludge raw material that this application case will be handled gained is that 7:1. 5:1. 5 mixes and stirs according to weight ratio, and to form raw mix, compression moulding promptly gets straw composite fuel.The blending ratio of this application case is unreasonable, and what adopt is paper mill sludge, and the water treatment phosphorus that its burning slag can't form high absorption capacity gathers filler.
In addition; One Chinese patent application CN 201010270995.5, and the applying date is on September 3rd, 2010, and invention and created name is: a kind of preparation method of sludge straw biomass fuel; This application case is with mud and coal grain elder generation mixed dehydration, again with the moulding of stalk mixing granulation.The mixed dehydration of this application case needs to filter, complicated operation, and cost is too high, and can not stablize the heavy metal ion in the mud, is not easy to outdoor storing up, and is prone to produce secondary pollution.
Summary of the invention
The technical problem that invention will solve
It is long to the present invention is directed in existing mud-stalk-raw coal mixed combusting technology the raw material dewatering time; The heavy metal that possibly exist in the transportation leaches, and the problem that its slag can not recycling, and a kind of biomass fuel based on mud-stalk-raw coal and preparation method thereof is provided; The present invention screens specific mud; And, utilizing the preliminary reduction water ratio of stalk and mud hybrid composting through adding a small amount of unslaked lime stone bactericidal dehydration, passivation of straw degradative soil ulmin and unslaked lime stone are met water generates OH
-Heavy metal content in all curable mud is beneficial to the storage and the transportation of mud-stalk mixture; Mud-stalk mixture again with raw coal mixing compression moulding, add behind the unslaked lime stone CaO, Al in the collaborative mud
2O
3, Fe
2O
3The characteristic high with NaCl content, SO in the curable reduction propellant combination burning process
2Release, and high in the slag of burning back because of Ca, Al and Fe content, promote the phosphorus adsorptive power in the sewage, make the fuel slag can be in sewage treatment process use as dephosphorization agent or as the artificial swamp applying filler.
Technical scheme
For achieving the above object, technical scheme provided by the invention is:
Biomass fuel based on mud-stalk-raw coal of the present invention; Described biomass fuel is aggregate mixing compression moulding with mud, stalk and raw coal; The mass ratio of its mud, stalk, raw coal is 1 ~ 3:1 ~ 3:3; Wherein, described mud is the dewatered sludge that adopts after aluminum salt is used, and wherein the oxide compound of aluminium is with Al
2O
3Meter quality percentage composition is not less than 5%, and the water ratio of mud is lower than 70%, and is pretreated through adding unslaked lime stone in the above-mentioned mud, and wherein to account for the mass percent of mud be 1 ~ 3% to unslaked lime stone; The water ratio of described stalk is lower than 60%, and its granularity pulverizing is less than 2.00 cm; Described raw coal combustion calorific value is not less than 25000 kilojoule/kilograms.
Preferably, the mass ratio of described mud, stalk, raw coal is 1:1:1.
The preparation method of the biomass fuel based on mud-stalk-raw coal of the present invention the steps include:
(1) raw materials pretreatment: in the dewatered sludge that adopts after aluminum salt is used, adding the unslaked lime masonry is pre-treatment, and wherein to account for the mass percent of mud be 1 ~ 3% to unslaked lime stone, and the oxide compound of aluminium is with Al in the pretreated mud
2O
3The meter mass content is not less than 5%, and water ratio is lower than 70%; Become granularity less than 2.00cm the stalk cutting and grinding, and the water ratio of stalk is lower than 60% subsequent use; Prepare the raw coal that combustion heat value is not less than 25000 kilojoule/kilograms;
(2) aerobic compost dehydration: the mass ratio 1 ~ 3:1 ~ 3:3 that presses mud, stalk, raw coal; Take by weighing mud, stalk and raw coal in the step (1); And with mud and stalk mixing; Carried out aerobic ventilation compost 15～50 days, carried out a turning in per 5 days, make the water ratio of mud-stalk mixture be lower than 50%; With mud and straw compost, can carry out fast dewatering among the present invention, simultaneously compost treatment can produce a large amount of soil ulmin, can adsorb Zn and Cu in a large number, reduces its biological effectiveness and transport property, can reach heavy metal-passivated effect, and CaO, Al in the mud
2O
3, Fe
2O
3Abundant with NaCl content, have solid sulphur effect with coal mixing afterfire;
(3) mud-stalk mixture mixes with raw coal: the raw coal that step (2) is taken by weighing mixes with the mud-stalk mixture of step (2), obtains mud-stalk-former coal mixtures;
(4) compression moulding: the mud-stalk of step (3)-former coal mixtures, through compression moulding, promptly get biomass fuel, its forming pressure is not less than 300 t, and biomass fuel physical dimension is: highly be lower than 15cm, diameter is less than 18cm.
Preferably, the mass ratio of mud, stalk, raw coal is 1:1:1 in the step (2).
The fuel slag that the present invention is based on the biomass fuel of mud-stalk-raw coal is used perhaps as the artificial swamp applying filler as dephosphorization agent in sewage treatment process.
Beneficial effect
Adopt technical scheme provided by the invention, compare, have following unusual effect with existing known technology:
(1) of the present inventionly taken all factors into consideration processing, problem of environmental pollution and the follow-up recycling that mud-stalk-raw coal is mixed with biomass fuel; Reach potion triple effect: CaO and mix with mud through adding a small amount of unslaked lime stone (CaO) as bactericidal dehydration curing heavy metal chemical agent; CaO mixes the back as sulphur-fixing agent with raw coal, and in cinder, forms the phosphorus adsorbent of CaO mineral facies; The present invention reduces raw coal combustion SO by the salinity in the mud
2Release; Utilize in the mud Al content high simultaneously, Ca in the raw coal, the essential characteristic that Fe content is high form in the biomass fuel dregs of incinerator high Ca, Al and Fe content to the strong absorption property of phosphorus; And can utilize stalk and mud to carry out the compost fast dewatering; And solidified the heavy metal that possibly exist in the mud, be convenient to outdoor storing up, reduced the secondary pollution of drenching with rain and producing;
(2) biomass fuel dregs of incinerator maximal absorptive capacity of the present invention surpasses 25 g/kg; For pure cinder 2 ~ 3 times are 10 ~ 20 times of the mineral filler zeolite, can be used as the substitute of fillers such as artificial swamp; When realizing that solid waste is made the recycling of filler; Greatly prolong the work-ing life of artificial swamp, also saved Mineral resources, thereby possessed vast application prospect;
(3) mud of the present invention is the dewatered sludge that adopts after aluminum salt is used, and wherein the oxide compound of aluminium is with Al
2O
3The meter mass content is not less than 5%, thereby utilizes high Ca and Fe equal size in the raw coal, generates with SiO behind the combined burning
2Be main nucleus, Ca, Al and Fe oxide compound are main crystalline phase, and the water treatment phosphorus that forms high absorption capacity gathers filler;
When (4) mud among the present invention, stalk, raw coal quality ratio are for 1:1:1; The biomass fuel best performance for preparing; Its combustion heat value reaches 22400 kilojoules/more than the kilogram, and in the furnace gas that burns the lower limit of per hour sulfur dioxide emissions measured value at 90 mg/m
3About, captured sulfur result is best, and per hour the quantity discharged of oxynitride at 132 mg/m
3About;
(5) the present invention has improved the economic value added of biomass fuel dregs of incinerator, and the raw material of employing is mainly mud, stalk the like waste, reduces the cost of manufacture of synthetic artifact matter fuel.
Description of drawings
Fig. 1 is that the biomass fuel of embodiment 1 burns back slag electron-microscope scanning figure;
Fig. 2 is that the biomass fuel of embodiment 2 burns back slag electron-microscope scanning figure;
Fig. 3 is the biomass fuel slag of embodiment 1 and the Langmuir thermo-isopleth that pure coal cinder adsorbs phosphor in sewage;
Fig. 4 is the biomass fuel slag of embodiment 2 and the Langmuir thermo-isopleth that pure coal cinder adsorbs phosphor in sewage;
Fig. 5 is biomass fuel slag and pure coal cinder mineral (XRD) the crystalline phase analytical results of embodiment 1 ~ 2.
Embodiment
For further understanding content of the present invention, the present invention is described in detail in conjunction with accompanying drawing and embodiment.
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment, concrete step is following:
(1) raw materials pretreatment: in the dewatered sludge that adopts after aluminum salt is used, adding the unslaked lime masonry is pre-treatment; The interpolation weight of unslaked lime stone is 1% of mud weight in the present embodiment; And unslaked lime stone and mud mixed; Mixing process is preprocessing process, and the oxide compound of aluminium is with Al in the pretreated mud
2O
3The meter mass content is 7%, and water ratio is 68%; Become granularity less than 2.00cm the stalk cutting and grinding; The water ratio of stalk is 57% subsequent use; Stalk in the present embodiment adopts corn straw; Contain certain Mierocrystalline cellulose and xylogen in the corn straw material, its xylogen is the structure monomer in the material, has to strengthen cell walls, the plain effect of binder fibre; And the preparation combustion heat value is not less than the raw coal of 25000 kilojoule/kilograms;
(2) aerobic compost dehydration: the mass ratio 1:1:1 that presses mud, stalk, raw coal; Take by weighing mud, stalk and raw coal in the step (1); And with mud and stalk mixing; Carried out aerobic ventilation compost 20 days, carried out a turning in per 5 days, the water ratio of compost mud after 20 days-stalk mixture is 40%;
(3) mud-stalk mixture mixes with raw coal: the raw coal that step (2) is taken by weighing mixes with the mud-stalk mixture of step (2), obtains mud-stalk-former coal mixtures;
(4) compression moulding: it promptly is the biomass fuel finished product after the compression moulding in the square stock mouth that the mud-stalk-former coal mixtures of step (3) is evenly delivered on the shaper; Its forming pressure is not less than 300 t; Biomass fuel profile main body is a right cylinder; Be of a size of: highly be 12cm, diameter is 17cm.Moulding artifact matter fuel combustion calorific value is: 22405 kilojoule/kilograms, standard coal equivalent calorific value are 29306 kilojoule/kilograms.Biomass fuel burns the back flue gas pollutant and discharges the 1-1 that sees the following form, and in the present embodiment, does not add unslaked lime stone as if in the mud, then SO
2Burst size be 200 ~ 220 mg/m
3So the present invention adds unslaked lime stone in mud effect is significant, captured sulfur result is obvious.
The Air Pollutant Emission that biomass fuel burns among the table 1-1 embodiment 1
Gather above-mentioned biomass fuel burning back slag and carry out heavy metal leaching research, the heavy metal leaching experiment shows that the leaching concentration of Cd, Zn, Cr, Cu, Pb, Ni is lower than the detection lower limit of ICP-MS: 0.5,1.0,0.5,1.0,1.0,1.0,1.0 μ gL
-1Wherein the leaching concentration of As is 12.5 ± 2.3 μ gL
-1, be lower than country of the People's Republic of China quality of groundwater standard (GB14848-93)-I class 2 one magnitude.The biomass fuel of present embodiment burns other physicochemical properties of back slag shown in table 1-2, and its main chemical compositions is shown in table 1-3, and Fig. 1 is that biomass fuel burns back slag electron-microscope scanning figure in the present embodiment.
Table 1-2 embodiment 1 biomass fuel slag each item physicals test mean parameter
The main chemical of table 1-3 embodiment 1 biomass fuel slag
The comparison of biomass fuel slag and pure coal dregs of incinerator maximal absorptive capacity: 100 orders are crossed in the biomass fuel slag and the sizing of pure coal incinerator of present embodiment; Accurately weighing sorbent material 0.50 restrains; Add among the solution 25mL, adsorption time 24h is under the condition of shaking speed 200rpm.Draw (Fig. 3 is the Langmuir adsorption isotherm line chart of present embodiment biomass fuel slag and pure coal dregs of incinerator) through the analog calculation of Langmuir adsorption isothermal line; The maximal absorptive capacity of biomass fuel slag is 28.9 g P/Kg; And the maximal absorptive capacity of pure coal dregs of incinerator all is lower than 12.6 g P/Kg, and visible biomass fuel slag is remarkable to the adsorptive power of phosphor in sewage.The biomass fuel slag of present embodiment can be used as dephosphorization agent and uses perhaps as the artificial swamp applying filler in sewage treatment process.
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment, concrete step is following:
(1) raw materials pretreatment: in the dewatered sludge that adopts after aluminum salt is used, adding the unslaked lime masonry is pre-treatment; The interpolation weight of unslaked lime stone is 3% of mud weight in the present embodiment; And unslaked lime stone and mud mixed, the oxide compound of aluminium is with Al in the pretreated mud
2O
3The meter mass content is 6%, and water ratio is 65%; Become granularity less than 2.00cm the stalk cutting and grinding; The water ratio of stalk is 58% subsequent use; Stalk in the present embodiment adopts corn straw; Contain certain Mierocrystalline cellulose and xylogen in the corn straw material, its xylogen is the structure monomer in the material, has to strengthen cell walls, the plain effect of binder fibre; And the preparation combustion heat value is not less than the raw coal of 25000 kilojoule/kilograms;
(2) aerobic compost dehydration: the mass ratio 1:1:3 that presses mud, stalk, raw coal; Take by weighing mud, stalk and raw coal in the step (1); And with mud and stalk mixing; Carried out aerobic ventilation compost 25 days, carried out a turning in per 5 days, the water ratio of compost mud after 25 days-stalk mixture is 41%;
(3) mud-stalk mixture mixes with raw coal: the raw coal that step (2) is taken by weighing mixes with the mud-stalk mixture of step (2), obtains mud-stalk-former coal mixtures;
(4) compression moulding: it promptly is the biomass fuel finished product after the compression moulding in the square stock mouth that the mud-stalk-former coal mixtures of step (3) is evenly delivered on the shaper; Its forming pressure is not less than 300 t; Biomass fuel profile main body is a right cylinder; Be of a size of: highly be 13cm, diameter is 15cm.Moulding artifact matter fuel combustion calorific value is: 21321 kilojoule/kilograms, standard coal equivalent calorific value are 29306 kilojoule/kilograms.Burn the back flue gas pollutant and discharge the 2-1 that sees the following form, in the present embodiment, if mud does not add unslaked lime stone, then SO
2Burst size be 210-230 mg/m
3So the present invention adds unslaked lime stone in mud effect is significant, captured sulfur result is obvious.
The Air Pollutant Emission that biomass fuel burns among the table 2-1 embodiment 2
Gather above-mentioned biomass fuel burning back slag and carry out heavy metal leaching research; The heavy metal leaching experiment shows that the leaching concentration of Cd, Zn, Cr, Cu, Pb, Ni is lower than the detection lower limit of ICP-MS: 0.5,1.0,0.5,1.0,1.0,1.0,1.0 μ gL
-1Wherein the leaching concentration of As is 13.7 ± 3.3 μ gL
-1, be lower than country of the People's Republic of China quality of groundwater standard (GB14848-93)-I class 2 one magnitude.The biomass fuel of present embodiment burns other physicochemical properties of back slag shown in table 2-2, and its main chemical compositions is shown in table 2-3, and Fig. 2 is that biomass fuel burns back slag electron-microscope scanning figure in the present embodiment.
Table 2-2 embodiment 2 biomass fuel slag each item physicalies test mean parameter
The main chemical of table 2-3 embodiment 2 biomass fuel slags
The comparison of biomass fuel slag and pure coal dregs of incinerator maximal absorptive capacity: 100 orders are crossed in the biomass fuel slag and the sizing of pure coal incinerator of present embodiment; Accurately weighing sorbent material 0.50 restrains; Add among the solution 25mL adsorption time 24h, the condition of shaking speed 200rpm.Draw (Fig. 4 is the Langmuir adsorption isotherm line chart of present embodiment biomass fuel slag and pure coal dregs of incinerator) through the analog calculation of Langmuir adsorption isothermal line; The maximal absorptive capacity of biomass fuel slag is 29.5 g P/Kg; And the maximal absorptive capacity of pure coal dregs of incinerator all is lower than 12.6 g P/Kg, and visible biomass fuel slag filler is remarkable to the adsorptive power of phosphor in sewage.The biomass fuel slag of present embodiment can be used as dephosphorization agent and uses perhaps as the artificial swamp applying filler in sewage treatment process.
Among the embodiment 1 ~ 2, biomass fuel slag and pure coal dregs of incinerator are the difference of its mineral crystalline phase to the major cause of phosphorus adsorptive power difference, after biomass fuel mixes mud, have formed nepheline (Na behind the high temperature incineration in the slag
2O (Al
2O
3)
2SiO
2), peridotites (Fe
2SiO
4), enstatite ((Ca, Mg, Fe, Al)
2(Si, Al)
2O
6), bytownite (Ca (Al
2Si
2O
8)) and (CaMg (SiO
3)
2) mineralogical composition such as diopside, and above-mentioned mineral crystal, forefathers are big, and quantity research shows, the mineral pair of high Ca, Fe and Al content is to phosphorus high adsorption capacity [Vohla; C., K v, M., Bavor; J., Chazarenc, F., ü lo; M., 2011. Filter materials for phosphorus removal from wastewater in treatment wetlands-A review. Ecological Engineering, 37,70-89].Corresponding is that the mineral crystalline phase is mainly in the pure coal with it: potash feldspar (KAlSi
3O
8), bytownite (Ca (Al
2Si
2O
8)) and gypsum (Ca (SO
4) 2H
2O), the mineral crystalline phase of formation is single relatively, thereby a little less than the adsorption to phosphorus element in the water body, Fig. 5 is biomass Fuel Furnace slag and pure coal cinder mineral (XRD) crystalline phase analytical results.
Embodiment 3
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment; Its preparation method is basically with embodiment 2; Difference is: the mass ratio of mud, stalk, raw coal is 2:1:3, and the biomass fuel fundamental property that makes is roughly with embodiment 2, and the adsorptive power to phosphor in sewage of its slag is remarkable; Draw through the analog calculation of Langmuir adsorption isothermal line, the maximal absorptive capacity of phosphorus is 27.8 g P/Kg.
Embodiment 4
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment; Its preparation method is basically with embodiment 2; Difference is: the mass ratio of mud, stalk, raw coal is 2:2:3, and the biomass fuel fundamental property that makes is roughly with embodiment 2, and the adsorptive power to phosphor in sewage of its slag is remarkable; Draw through the analog calculation of Langmuir adsorption isothermal line, the maximal absorptive capacity of phosphorus is 28.1 g P/Kg.
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment; Its preparation method is basically with embodiment 2; Difference is: the mass ratio of mud, stalk, raw coal is 1:2:3, and the biomass fuel fundamental property that makes is roughly with embodiment 2, and the adsorptive power to phosphor in sewage of its slag is remarkable; Draw through the analog calculation of Langmuir adsorption isothermal line, the maximal absorptive capacity of phosphorus is 27.5 g P/Kg.
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment; Its preparation method is basically with embodiment 2; Difference is: the mass ratio of mud, stalk, raw coal is 3:1:3, and the biomass fuel fundamental property that makes is roughly with embodiment 2, and the adsorptive power to phosphor in sewage of its slag is remarkable; Draw through the analog calculation of Langmuir adsorption isothermal line, the maximal absorptive capacity of phosphorus is 28.0 g P/Kg.
Embodiment 7
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment; Its preparation method is basically with embodiment 2; Difference is: the mass ratio of mud, stalk, raw coal is 2:3:3, and the biomass fuel fundamental property that makes is roughly with embodiment 2, and the adsorptive power to phosphor in sewage of its slag is remarkable; Draw through the analog calculation of Langmuir adsorption isothermal line, the maximal absorptive capacity of phosphorus is 28.1 g P/Kg.
Embodiment 8
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment; Its preparation method is basically with embodiment 2; Difference is: the mass ratio of mud, stalk, raw coal is 3:2:3, and the biomass fuel fundamental property that makes is roughly with embodiment 2, and the adsorptive power to phosphor in sewage of its slag is remarkable; Draw through the analog calculation of Langmuir adsorption isothermal line, the maximal absorptive capacity of phosphorus is 27.9 g P/Kg.
Embodiment 9
The preparation method based on the biomass fuel of mud-stalk-raw coal of present embodiment; Its preparation method is basically with embodiment 2; Difference is: the mass ratio of mud, stalk, raw coal is 1:3:3, and the biomass fuel fundamental property that makes is roughly with embodiment 2, and the adsorptive power to phosphor in sewage of its slag is remarkable; Draw through the analog calculation of Langmuir adsorption isothermal line, the maximal absorptive capacity of phosphorus is 28.3 g P/Kg.
Claims (5)
1. based on the biomass fuel of mud-stalk-raw coal; It is characterized in that: described biomass fuel is aggregate mixing compression moulding with mud, stalk and raw coal; The mass ratio of its mud, stalk, raw coal is 1 ~ 3:1 ~ 3:3; Wherein, described mud is the dewatered sludge that adopts after aluminum salt is used, and wherein the oxide compound of aluminium is with Al
2O
3Meter quality percentage composition is not less than 5%, and the water ratio of mud is lower than 70%, and is pretreated through adding unslaked lime stone in the above-mentioned mud, and wherein to account for the mass percent of mud be 1 ~ 3% to unslaked lime stone; The water ratio of described stalk is lower than 60%, and its granularity pulverizing is less than 2.00 cm; Described raw coal combustion calorific value is not less than 25000 kilojoule/kilograms.
2. the biomass fuel based on mud-stalk-raw coal according to claim 1 is characterized in that: the mass ratio of described mud, stalk, raw coal is 1:1:1.
3. based on the preparation method of the biomass fuel of mud-stalk-raw coal, the steps include:
(1) raw materials pretreatment: in the dewatered sludge that adopts after aluminum salt is used, adding the unslaked lime masonry is pre-treatment, and wherein to account for the mass percent of mud be 1 ~ 3% to unslaked lime stone, and the oxide compound of aluminium is with Al in the pretreated mud
2O
3The meter mass content is not less than 5%, and water ratio is lower than 70%; Become granularity less than 2.00cm the stalk cutting and grinding, and the water ratio of stalk is lower than 60% subsequent use; Prepare the raw coal that combustion heat value is not less than 25000 kilojoule/kilograms;
(2) aerobic compost dehydration: the mass ratio 1 ~ 3:1 ~ 3:3 that presses mud, stalk, raw coal; Take by weighing mud, stalk and raw coal in the step (1); And with mud and stalk mixing; Carried out aerobic ventilation compost 15～50 days, carried out a turning in per 5 days, make the water ratio of mud-stalk mixture be lower than 50%;
(3) mud-stalk mixture mixes with raw coal: the raw coal that step (2) is taken by weighing mixes with the mud-stalk mixture of step (2), obtains mud-stalk-former coal mixtures;
(4) compression moulding: the mud-stalk of step (3)-former coal mixtures, through compression moulding, promptly get biomass fuel, its forming pressure is not less than 300 t, and biomass fuel physical dimension is: highly be lower than 15cm, diameter is less than 18cm.
4. the preparation method of the biomass fuel based on mud-stalk-raw coal according to claim 3 is characterized in that: the mass ratio of mud, stalk, raw coal is 1:1:1 in the step (2).
5. the fuel slag of the biomass fuel based on mud-stalk-raw coal according to claim 1 and 2 is used as dephosphorization agent in sewage treatment process or as the artificial swamp applying filler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210215416.6A CN102703155B (en) | 2012-06-27 | 2012-06-27 | Biomass fuel based on sludge, straw and raw coal, preparation method of biomass fuel and application of fuel slag |
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| CN104987907A (en) * | 2015-06-30 | 2015-10-21 | 广西科技大学 | Novel moulded coal and preparation method thereof |
| CN105670730A (en) * | 2016-04-08 | 2016-06-15 | 王建标 | Biomass solid fuel and preparation method thereof |
| CN105695033A (en) * | 2016-04-12 | 2016-06-22 | 杜普利 | Preparation method of sludge biomass fuels |
| CN106587363A (en) * | 2017-01-06 | 2017-04-26 | 青海爱迪旺环保科技有限公司 | Immobilized functional filler of artificial wetland |
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| CN107723048A (en) * | 2017-11-21 | 2018-02-23 | 桂林市安琪玫瑰农业发展有限公司 | A kind of method that biomass fuel is prepared using biomass sludge |
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| CN111499000A (en) * | 2020-04-28 | 2020-08-07 | 成都工业学院 | Constructed wetland filler and preparation method thereof |
| CN111774029A (en) * | 2020-06-30 | 2020-10-16 | 华中科技大学 | Preparation of PM from biomass ash2.5Method for producing adsorbent, product and application thereof |
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| CN104987907A (en) * | 2015-06-30 | 2015-10-21 | 广西科技大学 | Novel moulded coal and preparation method thereof |
| CN105670730A (en) * | 2016-04-08 | 2016-06-15 | 王建标 | Biomass solid fuel and preparation method thereof |
| CN105695033A (en) * | 2016-04-12 | 2016-06-22 | 杜普利 | Preparation method of sludge biomass fuels |
| CN107177391A (en) * | 2016-12-31 | 2017-09-19 | 湖北金日生态能源股份有限公司 | A kind of stalk and coal blending fuel and its production technology |
| CN106587363A (en) * | 2017-01-06 | 2017-04-26 | 青海爱迪旺环保科技有限公司 | Immobilized functional filler of artificial wetland |
| CN107723048A (en) * | 2017-11-21 | 2018-02-23 | 桂林市安琪玫瑰农业发展有限公司 | A kind of method that biomass fuel is prepared using biomass sludge |
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| CN110975828B (en) * | 2019-11-20 | 2022-06-24 | 紫科装备股份有限公司 | Adsorbing material for purifying sludge incineration flue gas and preparation method thereof |
| CN111499000A (en) * | 2020-04-28 | 2020-08-07 | 成都工业学院 | Constructed wetland filler and preparation method thereof |
| CN111774029A (en) * | 2020-06-30 | 2020-10-16 | 华中科技大学 | Preparation of PM from biomass ash2.5Method for producing adsorbent, product and application thereof |
| CN111774029B (en) * | 2020-06-30 | 2021-11-19 | 华中科技大学 | Preparation of PM from biomass ash2.5Method for producing adsorbent, product and application thereof |
| CN113264566A (en) * | 2021-06-30 | 2021-08-17 | 江南大学 | Method for synchronously realizing harmless treatment of azo dye and straw recycling treatment |
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