CN105969453A - Low-chlorine value biomass briquette fuel and production method thereof - Google Patents

Abstract

The invention discloses a low-chlorine value biomass briquette fuel. According to the invention, the pretreated corn straws are taken as a raw material for anaerobic fermentation for 10-20 days, so that mechanical endurance of the briquette fuel is increased, magnesium carbonate is taken as an anti-slagging agent, during a combustion process, the Mg element and elements such as Si, K, and Na which are inherent in the corn straws and are capable of slagging are subjected to a reaction, a novel compound K2Mg(SO4)2 is generated and provides anti-slagging performance to the briquette fuel, and the produced briquette fuel has the advantages of low chlorine value and high combustion value, no harmful gas is discharged after combustion is carried out, and a boiler is not easily corroded.

Description

A kind of low chlorine number biomass molding fuel and preparation method thereof

Technical field

The present invention relates to biomass fuel technical field, particularly relate to a kind of low chlorine number biomass molding fuel and making thereof Method.

Background technology

Biomass energy because it is renewable, aboundresources, environmental friendliness and become world's fourth largest energy, be also the most permissible Transport and the clean reproducible energy stored, mainly by the biomass energy technology modernized by agricultural wastes, felling Residue, feces of livestock and poultry, MSW, sanitary sewage become biological particles to fire with Raw material processings such as industrial organic waste waters The 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 has The most wide application prospect and development space, thus Developing Biomass fuel has become the mankind and has solved energy problem and improve ring One important means in border and developing direction.China is large agricultural country, and biomass resource enriches, the yield of annual agricultural crop straw More 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 it Utilize significant.The raw materials such as agricultural crop straw exist loosely organized, density is little, distribution is not concentrated, the thermal efficiency is low, inconvenient Many 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 relatively Greatly, 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 composition The 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 modification And 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 out Ferment, 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 residue Energy 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 increase By 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 demand Place, 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 a kind of low chlorine number biomass molding fuel and Manufacture method.

The present invention is achieved by the following technical solutions:

A kind of low chlorine number biomass molding fuel, is prepared by the raw materials in: corn straw 100, manioc waste 23-25, Bamboo bits 18-20, magnesium carbonate 7-8, turfy soil 6-8, anion powder 17-19, nano titanium oxide 1.2-1.4, calcium bicarbonate 2-3, Waste oil 5-7, activated carbon 10-12, calcium nitrate 1-2, suitable quantity of water.

The manufacture method of described a kind of low chlorine number biomass molding fuel, comprises the following steps:

(1) calcium bicarbonate is added water stirring to being completely dissolved, add turfy soil impregnate 10-12 hour, take out in 105 DEG C of baking ovens Drying is pulverized, and adds waste oil mixing, is warming up to 80-90 DEG C, adds nano titanium oxide ultrasonic grinding 10-15 minute, It is spray-dried and prepares combustion adjuvant；

(2) anion powder 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80- Ultrasonic Treatment 8-10 minute at 100 DEG C, dries, and adds activated carbon roasting 2-4 hour at 630-720 DEG C, is cooled to room temperature Grind and prepare modified negative-ion 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 temperature At 30-50 DEG C, humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, and addition modified negative-ion powder, manioc waste stir Isolation air continues fermentation 10-20 days, filtering drying, puts into and is crushed to 60-80 mesh in pulverizer；

(4) by step (3) material, bamboo bits stirring and evenly mixing, adding combustion adjuvant, water and the mixing of other residual components, feeding is squeezed into Type machine, is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm with the briquetting pressure of 6MPa, 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 out After ferment, the relative amount of stalk hemicellulose and cellulose reduces, and lignin relative amount increases, and volatile matter content reduces, benzene alcohol Extract declines can improve the mechanical endurance of shaped fuel, compound resistive connection slag agent and combustion-supporting after finally biogas residue drying being pulverized Agent 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 this Abrasion；The present invention using magnesium carbonate as resistive connection slag agent, in combustion Mg element intrinsic with corn straw, knot can be caused The elements such as Si, K, Na of slag there occurs reaction, generates new compound K₂Mg(SO₄)₂And make it have anti-slagging properties, system Standby shaped fuel chlorine number is low, fuel value is high, there is no the discharge of harmful gas after burning, is also not easy to corrode boiler.

Detailed description of the invention

A kind of low chlorine number biomass molding fuel, is prepared by the raw materials in: corn straw 100, manioc waste 23, Bamboo bits 18, magnesium carbonate 7, turfy soil 6, anion powder 17, nano titanium oxide 1.2, calcium bicarbonate 2, waste oil 5, activated carbon 10, Calcium nitrate 1, suitable quantity of water.

The manufacture method of described a kind of low chlorine number biomass molding fuel, comprises the following steps:

(1) calcium bicarbonate is added water stirring to being completely dissolved, add turfy soil impregnate 10-12 hour, take out in 105 DEG C of baking ovens Drying is pulverized, and adds waste oil mixing, is warming up to 80-90 DEG C, adds nano titanium oxide ultrasonic grinding 10-15 minute, It is spray-dried and prepares combustion adjuvant；

(2) anion powder 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80- Ultrasonic Treatment 8-10 minute at 100 DEG C, dries, and adds activated carbon roasting 2-4 hour at 630-720 DEG C, is cooled to room temperature Grind and prepare modified negative-ion 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 temperature At 30-50 DEG C, humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, and addition modified negative-ion powder, manioc waste stir Isolation air continues fermentation 10-20 days, filtering drying, puts into and is crushed to 60-80 mesh in pulverizer；

(4) by step (3) material, bamboo bits stirring and evenly mixing, adding combustion adjuvant, water and the mixing of other residual components, feeding is squeezed into Type machine, is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm with the briquetting pressure of 6MPa, is dried, discharging.

The technical parameter index using the biomass molding fuel of present invention production is as follows:

(1) relaxed density is 1.152g/cm³；

(2) biogas residue lignin quality mark adds 33.4%；

(3) ash: 6.42%；

(4) calorific value: 25.21MJ/kg.

Claims (2)

1. one kind low chlorine number biomass molding fuel, it is characterised in that be prepared by the raw materials in: corn straw 100, Manioc waste 23-25, bamboo bits 18-20, magnesium carbonate 7-8, turfy soil 6-8, anion powder 17-19, nano titanium oxide 1.2-1.4, Calcium bicarbonate 2-3, waste oil 5-7, activated carbon 10-12, calcium nitrate 1-2, suitable quantity of water.

The manufacture method of a kind of low chlorine number biomass molding fuel the most according to claim 1, it is characterised in that include with Lower step:

(1) calcium bicarbonate is added water stirring to being completely dissolved, add turfy soil impregnate 10-12 hour, take out in 105 DEG C of baking ovens Drying is pulverized, and adds waste oil mixing, is warming up to 80-90 DEG C, adds nano titanium oxide ultrasonic grinding 10-15 minute, It is spray-dried and prepares combustion adjuvant；

(2) anion powder 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80- Ultrasonic Treatment 8-10 minute at 100 DEG C, dries, and adds activated carbon roasting 2-4 hour at 630-720 DEG C, is cooled to room temperature Grind and prepare modified negative-ion 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 temperature At 30-50 DEG C, humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, and addition modified negative-ion powder, manioc waste stir Isolation air continues fermentation 10-20 days, filtering drying, puts into and is crushed to 60-80 mesh in pulverizer；

(4) by step (3) material, bamboo bits stirring and evenly mixing, adding combustion adjuvant, water and the mixing of other residual components, feeding is squeezed into Type machine, is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm with the briquetting pressure of 6MPa, is dried, discharging.