A kind of biomass molding fuel of environment-friendly type high heating value and preparation method thereofTechnical field
The present invention relates to biomass fuel technical field, particularly relate to the biomass molding fuel of a kind of environment-friendly type high heating valueAnd preparation method thereof.
Background technology
Biomass energy because it is renewable, aboundresources, environmental friendliness and become world's fourth largest energy, be also the most permissibleTransport and the clean reproducible energy stored, mainly by the biomass energy technology modernized by agricultural wastes, fellingResidue, feces of livestock and poultry, MSW, sanitary sewage become biological particles to fire with Raw material processings such as industrial organic waste watersThe end products such as material, biodiesel, bio-fuel ethanol.Biomass fuel is discharged almost without SO2 during later-stage utilization,Decrease the acid rain caused by flue gas and the harm of greenhouse effect produced during it utilizes so that biomass energy hasThe most wide application prospect and development space, thus Developing Biomass fuel has become the mankind and has solved energy problem and improve ringOne important means in border and developing direction.China is large agricultural country, and biomass resource enriches, the yield of annual agricultural crop strawMore than 700,000,000 t, wherein amount usable is about 5.055 hundred million t, accounts for the 50%-60% of Chinese biological matter total resources, therefore, converts itUtilize significant.The raw materials such as agricultural crop straw exist loosely organized, density is little, distribution is not concentrated, the thermal efficiency is low, inconvenientMany defects such as transport and storage, are unfavorable for utilizing on a large scale, utilize mechanical force that compressed biomass or extruding are become density relativelyGreatly, the thermal efficiency is high, it is simple to the solid fuel of transport storage is the most relatively advanced a kind of biomass economy mode.
It is tight to there is equipment attrition for straw compressing and forming in " molding fuel test is prepared in stalk anaerobic fermentation modification " literary compositionThe antibiont degraded barrier that weight and anaerobic fermentation face, it is proposed that the thinking of shaped fuel is prepared in a kind of stalk anaerobic fermentation modificationAnd carried out experimental study.With corn straw as raw material in literary composition, the anaerobism that raw material carries out 10d and 20 d respectively by a definite date is sent outFerment, the biogas residue after fermentation size-reduced and dried in 100 DEG C, be compressed into the granular fuel of diameter 10 mm under the conditions of 6 MPa.Result of the test shows: after stalk anaerobic fermentation, and the energy being retained in biogas residue is more than the energy transferred in biogas, straw biogas residueEnergy value high, but after fermentation 20 d, straw content of ashes is 3 times of non-fermented stalk, and its clinkering property may be made to increaseBy force, the shaped fuel calorific value and prepared in literary composition only improves about 5.82% than raw material, it is impossible to meets blast furnace or has high heating value demandPlace, and exist when small-sized cooking stove misfire, the problem such as the length duration of ignition and smoke pollution, efficiency of combustion is low,Need in addition modified to obtain high heating value, the novel biomass shaped fuel of resistive connection slag.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that the biomass moulding of a kind of environment-friendly type high heating valueFuel and preparation method thereof.
The present invention is achieved by the following technical solutions:
The biomass molding fuel of a kind of environment-friendly type high heating value, is prepared by the raw materials in: corn straw 100, tea grounds22-24, magnesium carbonate 6.2-6.5, carbamide 2-3, manganese sulfate 3-4, potassium nitrate 1-3, copper oxide 11-13, microcrystalline wax 6-8, dynamic plantThing greasy filth 8-10, magnesium aluminium spinel powder 16-18, coal dust 17-19, sodium peroxide 2-4, suitable quantity of water.
The manufacture method of the biomass molding fuel of described a kind of environment-friendly type high heating value, comprises the following steps:
(1) by manganese sulfate, potassium nitrate mixed grinding 20-30 minute, put in 60-80 DEG C of water-bath, add animals and plants greasy filth constant temperature2-3 hour, it is evaporated, adds microcrystalline wax, sodium peroxide ultrasonic grinding 10-15 minute, be dried and prepare combustion adjuvant；
(2) magnesium aluminium spinel powder 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water inUltrasonic Treatment 8-10 minute at 80-100 DEG C, dries, and adds copper oxide roasting 2-4 hour at 810-860 DEG C, is cooled to roomTemperature is ground and is prepared modified magnesium aluminium spinel powder；
(3) by corn straw with hot-water soak 10-12 hour of 60-70 DEG C, filter and put in fermentation vat, control fermentation vat temperatureAt 30-50 DEG C, humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, adds modified magnesium aluminium spinel powder, tea grounds stirring allEven isolation air continues fermentation 10-20 days, filtering drying, puts into and is crushed to 60-80 mesh in pulverizer；
(4) in step (3) material, add combustion adjuvant, water and the mixing of other residual components, send into single lead screw ex truding briquetting machine, with 6MPa'sBriquetting pressure is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm, is dried, discharging.
The invention have the advantage that the anaerobism that the present invention carries out 10-20d by a definite date with pretreated corn straw for raw material is sent outAfter ferment, the relative amount of stalk hemicellulose and cellulose reduces, and lignin relative amount increases, and volatile matter content reduces, benzene alcoholExtract declines can improve the mechanical endurance of shaped fuel, compound resistive connection slag agent and combustion-supporting after finally biogas residue drying being pulverizedAgent and the compression forming under the conditions of 6MPa of other effective ingredient, fast desirable pressure of preparation process molding is little contributes to reduction equipment for thisAbrasion；The present invention using magnesium carbonate as resistive connection slag agent, in combustion Mg element intrinsic with corn straw, knot can be causedThe elements such as Si, K, Na of slag there occurs reaction, generates new compound K2Mg(SO4)2And make it have anti-slagging properties, withMicrocrystalline wax, sodium peroxide etc. improve efficiency of combustion and the heat energy of fuel as firing combustion adjuvant, the shaped fuel tool of preparationThere is the few calorific value of smog high, it is easy to molding, the advantage that production efficiency is high, suitably as high heating value biomass fuel and processing methodApplication.
Detailed description of the invention
The biomass molding fuel of a kind of environment-friendly type high heating value, is prepared by the raw materials in: corn straw 100,Tea grounds 22, magnesium carbonate 6.2, carbamide 2, manganese sulfate 3, potassium nitrate 1, copper oxide 11, microcrystalline wax 6, animals and plants greasy filth 8, magnalium pointSpar powder 16, coal dust 17, sodium peroxide 2, suitable quantity of water.
The manufacture method of the biomass molding fuel of described a kind of environment-friendly type high heating value, comprises the following steps:
(1) by manganese sulfate, potassium nitrate mixed grinding 20-30 minute, put in 60-80 DEG C of water-bath, add animals and plants greasy filth constant temperature2-3 hour, it is evaporated, adds microcrystalline wax, sodium peroxide ultrasonic grinding 10-15 minute, be dried and prepare combustion adjuvant；
(2) magnesium aluminium spinel powder 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water inUltrasonic Treatment 8-10 minute at 80-100 DEG C, dries, and adds copper oxide roasting 2-4 hour at 810-860 DEG C, is cooled to roomTemperature is ground and is prepared modified magnesium aluminium spinel powder；
(3) by corn straw with hot-water soak 10-12 hour of 60-70 DEG C, filter and put in fermentation vat, control fermentation vat temperatureAt 30-50 DEG C, humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, adds modified magnesium aluminium spinel powder, tea grounds stirring allEven isolation air continues fermentation 10-20 days, filtering drying, puts into and is crushed to 60-80 mesh in pulverizer；
(4) in step (3) material, add combustion adjuvant, water and the mixing of other residual components, send into single lead screw ex truding briquetting machine, with 6MPa'sBriquetting pressure is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm, is dried, discharging.
The technical parameter index using the biomass molding fuel of present invention production is as follows:
(1) relaxed density is 1.162g/cm3；
(2) biogas residue alcohol benzene extractive mass fraction reduces 38.2%；
(3) sulfur content: 0.353%；
(4) ash: 5.11%；
(5) calorific value: 25.72MJ/kg.