CN105969468A - Biomass briquette fuel by adding calcium carbide as combustion improver and production method thereof - Google Patents

Abstract

The invention discloses a biomass briquette fuel by adding calcium carbide as a combustion improver. 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, calcium carbide as the combustion improver is capable of increasing the combustion efficiency and heat energy of the fuel, and the produced briquette fuel has the advantage of full combustion, the added calcium carbide can rapidly release oxygen while meets water vapor, fuel combustion is accelerated, heat energy is increased, at the same time, cost is reduced by using crop straws, and the environment is protected.

Description

A kind of add biomass molding fuel that carbide is combustion adjuvant and preparation method thereof

Technical field

The present invention relates to biomass fuel technical field, particularly relate to a kind of add the biomass moulding that carbide is combustion adjuvant Fuel and 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 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 add the biomass that carbide is combustion adjuvant Shaped fuel and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of add the biomass molding fuel that carbide is combustion adjuvant, be prepared by the raw materials in: corn straw 100, Rice stalk 20-22, magnesium carbonate 4.5-5.4, aramid fiber 12-14, kieselguhr 18-20, molasses 10-12, carbide 6-8, sodium humate 1.3-1.5, pitch 7-9, carborundum 8-10, potassium nitrate 1-2, sodium chlorate 3-5, suitable quantity of water.

Described a kind of manufacture method adding the biomass molding fuel that carbide is combustion adjuvant, comprises the following steps:

(1) adding pitch stirring and evenly mixing by broken for carbide, heated and boiled keeps temperature to stir 20-30 minute, is cooled to room temperature and grinds Grinds, adds potassium nitrate, sodium chlorate mixing 1-3 hour prepared combustion adjuvant of grinding

(2) kieselguhr 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80-100 Ultrasonic Treatment 8-10 minute at DEG C, dries, and adds carborundum roasting 2-4 hour at 690-740 DEG C, is cooled to grinding at room temperature Prepare modification infusorial earth；

(3) by corn straw, rice stalk with hot-water soak 10-12 hour of 60-70 DEG C, filter and put in fermentation vat, control fermentation Pond temperature is at 30-50 DEG C, and humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, adds modification infusorial earth, molasses stirring all Even 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, aramid fiber stirring and evenly mixing, add combustion adjuvant, water and the mixing of other residual components, send into and squeeze Pressing 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, with Carbides etc. improve efficiency of combustion and the heat energy of fuel as firing combustion adjuvant, and the shaped fuel burning of preparation is abundant, interpolation Carbide meets water vapour can discharge rapidly oxygen, accelerates fuel combustion, improves heat energy, utilize agricultural crop straw to reduce simultaneously Cost protects environment.

Detailed description of the invention

A kind of add the biomass molding fuel that carbide is combustion adjuvant, be prepared by the raw materials in: corn straw 100, rice stalk 20, magnesium carbonate 4.5, aramid fiber 12, kieselguhr 18, molasses 10, carbide 6, sodium humate 1.3, pitch 7, carbonization Silicon 8, potassium nitrate 1, sodium chlorate 3, suitable quantity of water.

Described a kind of manufacture method adding the biomass molding fuel that carbide is combustion adjuvant, comprises the following steps:

(1) adding pitch stirring and evenly mixing by broken for carbide, heated and boiled keeps temperature to stir 20-30 minute, is cooled to room temperature and grinds Grinds, adds potassium nitrate, sodium chlorate mixing 1-3 hour prepared combustion adjuvant of grinding

(2) kieselguhr 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80-100 Ultrasonic Treatment 8-10 minute at DEG C, dries, and adds carborundum roasting 2-4 hour at 690-740 DEG C, is cooled to grinding at room temperature Prepare modification infusorial earth；

(3) by corn straw, rice stalk with hot-water soak 10-12 hour of 60-70 DEG C, filter and put in fermentation vat, control fermentation Pond temperature is at 30-50 DEG C, and humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, adds modification infusorial earth, molasses stirring all Even 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, aramid fiber stirring and evenly mixing, add combustion adjuvant, water and the mixing of other residual components, send into and squeeze Pressing 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 1.189g/cm³；

(2) biogas residue alcohol benzene extractive mass fraction reduces 38.8%；

(3) ash: 5.82%；

(4) calorific value: 26.06MJ/kg.

Claims (2)

1. one kind is added the biomass molding fuel that carbide is combustion adjuvant, it is characterised in that be prepared by the raw materials in: Corn straw 100, rice stalk 20-22, magnesium carbonate 4.5-5.4, aramid fiber 12-14, kieselguhr 18-20, molasses 10-12, carbide 6-8, sodium humate 1.3-1.5, pitch 7-9, carborundum 8-10, potassium nitrate 1-2, sodium chlorate 3-5, suitable quantity of water.

A kind of manufacture method adding the biomass molding fuel that carbide is combustion adjuvant the most according to claim 1, it is special Levy and be to comprise the following steps:

(1) adding pitch stirring and evenly mixing by broken for carbide, heated and boiled keeps temperature to stir 20-30 minute, is cooled to room temperature and grinds Grinds, adds potassium nitrate, sodium chlorate mixing 1-3 hour prepared combustion adjuvant of grinding

(2) kieselguhr 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80-100 Ultrasonic Treatment 8-10 minute at DEG C, dries, and adds carborundum roasting 2-4 hour at 690-740 DEG C, is cooled to grinding at room temperature Prepare modification infusorial earth；

(3) by corn straw, rice stalk with hot-water soak 10-12 hour of 60-70 DEG C, filter and put in fermentation vat, control fermentation Pond temperature is at 30-50 DEG C, and humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, adds modification infusorial earth, molasses stirring all Even 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, aramid fiber stirring and evenly mixing, add combustion adjuvant, water and the mixing of other residual components, send into and squeeze Pressing 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.