Characteristics of biomass solid fuel and the benefit of the EIA analysis, biomass pellet machine

Characteristics of biomass solid fuel (A), biomass briquette is the use of new technology and special equipment will crop stalks, wood chips, sawdust, husk, corn cobs, straw, wheat straw, wheat bran, tree leaves and other low-grade Biomass, in the absence of any additives and a binder case, by varying the density of compressed biomass briquette clean fuel, because the straw and other materials containing cellulose and lignin certain that lignin is the material The structure of the monomer, benzene propane-type polymers. With enhanced cell walls, cellulose adhesion effect. Lignin is a non-crystalline, at room temperature, the major part of any solvent-insoluble, no melting point, but a softening point. When the temperature reaches a certain value, the lignin softening the adhesive force increases, and at a certain pressure, so that the cellulose molecules dislocation, deformation, extension, adjacent to the biomass particles inside each other engage the re-combination of repression forming, so loose, low energy density, thermal efficiency is only about 10%, do not keep well, inconvenient transportation and utilization of biomass feedstock and processed into a compact, high energy density and thermal efficiency up to 45%, easy to save and to facilitate the transport of high quality clean energy products. It has the characteristics of a good burn, burn out rate, low dust, low chemical emissions advantages. (B) to form the structure of biomass solid fuel biomass solid fuel from combustible matter, inorganic matter and water, which mainly contains carbon (C), hydrogen (H), oxygen (O) and a small amount of nitrogen (N) , sulfur (S) and other elements, and contains ash and moisture. Carbon: biomass briquette less carbon (approximately 40-45%), especially in a low fixed carbon content, easy to burn. Hydrogen: biomass briquette hydrogen quantity (about 8-10%), volatile high (about 75%). Most biomass carbon and hydrogen combine to form a low molecular weight hydrocarbons, after experiencing a certain temperature thermal decomposition and precipitation evaporation. S: biomass briquettes in the sulfur content of less than 0.02% necessary to provide the combustion flue gas desulfurization equipment, desulfurization reducing business process costs, and it helps protect the environment. N: biomass briquettes in nitrogen is less than 0.15%, NOx emissions standards completely. Ash: biomass briquettes with high-quality wood-based biomass as a raw material, ash is very low, only about 3-5%. The main technical parameters (c), biomass solid fuel biomass fuels physical and chemical indicators after forming: density: 700-1300 kg / m; ash content: 3-20%; moisture ≤15%. Calorific value: 3500-4500 kcal / kg; calorific value of biomass briquette blocks to types of raw materials differ. Corn stover as an example: the heat value of about 0.8 to 0.95 times the coal, namely 1.1t corn straw briquette block 1t equivalent calorific value of coal, corn straw briquette block in supporting under-fired biomass combustion furnace combustion, combustion efficiency is 1.3 to 1.5 times coal-fired boilers, heat utilization and therefore corn straw briquette 1t 1t coal block and heat utilization considerably. Indicators Table biomass solid briquette: Item Index calorific value> 4200kcal / kg density> 1.1t / m 3 Appearance square (round) Cylindrical φ1-3cm ash ≤ 7% moisture ≤ 13% burn rate ≥ 96% thermal efficiency ≥ 81 % black smoke (Ringelmann level) <1 Dust concentration ≤ 80mg / m 3 (d), the biomass solid fuel BMF Features (1) Biomass fuel can achieve the greenhouse gas carbon dioxide (CO2) Ecology "zero "discharge, BMF's energy comes from natural photosynthesis fixed solar plant on its carbon dioxide emissions when burned (CO2) absorption of nature dioxide (CO2) from the time of its growth, therefore, BMF has carbon dioxide (CO2) Ecological Characteristics of zero emissions. (2) Biomass fuel is a low-carbon energy: BMF combustion to volatile based, fixed carbon content of only 15%, so a typical low-carbon fuels. (3) to reduce sulfur dioxide (SO2) emissions: BMF sulfur content of diesel fuel still low, only 0.05%, can be achieved without setting desulfurization of sulfur dioxide (SO2) emissions. (4) Dust emissions standards: BMF ash content of 1.8%, which is about 1/10 of coal-based fuels, set up a simple dust collector dust emissions compliance can be achieved. (5) to reduce nitrogen oxides (NOx) are generated: BMF low nitrogen content, high oxygen content, the combustion air can effectively reduce demand and reduce nitrogen oxides (NOx) formation. (6) BMF from agricultural and forestry waste, ash rate of 96%, the remaining 4% of ash can be recycled to make potash, to achieve a "straw → Fuel → fertilizer" in circulation. Does not have a "competing with food," and "competing with them," the social issues, are widely distributed and diverse materials, heat content, low cost, circulation growth, inexhaustible, is a typical circular economy project. (7) safe and convenient: big BMF density, small size, solid molding, sealed packaging, transportation, storage and safe and convenient. (8) emissions after burning: CO2 zero emissions; NO2 14 mg / m (micro); SO2 46 mg / m far below national standards; smoke less than 127 mg / m far below national standards. (9) biomass briquette volatile, easy to precipitate carbon activity, flammable, less ash, ignition faster, and more fuel-efficient, lower cost. At present, China small boilers town 4t / h or less mainly fuel (gas), mostly coal-fired, with Guangdong province alone more than ten million units changed hand. Biomass briquettes instead of oil (gas), coal combustion, very significant economic benefits, the following table to steam boilers, for example, assumed that biomass pellet fuel consumption standards for the calculation of the ratio of 10,000 yuan per month, lists of biomass briquette fuel and operating costs of various fuels comparison table: Item biomass briquette coal natural gas and diesel fuel consumption costs Remarks monthly amount 11,600 yuan 11,300 yuan 12,300 yuan 17,300 in fuel costs savings rate (-%) -6% -5% - 21% -42% good bad good bad environmental benefits (e), the cost category items biomass solid fuel and other fuels II class bituminous light diesel oil natural gas biomass Notes calorific 5000kcal / kg10200kcal / kg8600kcal / nm33900kcal / kg thermal efficiency 60% 90% 91% 86% fuel density 11001400kg / m3820kg / m30.756kg / m38001100kg / m3 CO2G / kw.h emissions 955 818 430 20 SO2G / kw.h emissions 11.8 14.2 --- 0.1 NOXG / kw.h Emissions 4.3 4.0 0.5 1.2 Compare prices 0.70 yuan /kg7.5 yuan /kg2.6 yuan / Nm3 0.70 元 / kg current prices prevail fuel consumption 800kg / h 261.5kg / h310nm3 / h 813kg / h to 4t / h boiler calculate consumption costs 560 yuan / h 1961.2 元 / h744 yuan / h 568.8 元 / h to 4t / h boiler calculate comprehensive evaluation of emission, high processing cost, low flammable better cost, high environmental cost, policy does not advocate the use of Emissions less convenient, less pollution countries suggested that, with the median cost of policies to encourage support for improvement but the policy does not advocate