Knowledge about biomass boilers and biomass fuels

Biomass includes several categories such as plants, animals and their excreta, garbage and organic wastewater. In a broad sense, biomass is organic matter generated by plants through photosynthesis, and its energy initially comes from solar energy, so biomass energy is a kind of solar energy. Biomass boiler is specialized in burning biomass forming fuel a boiler, it runs environmentally friendly, fuel saving, is now more advocated the use of boilers, biomass boilers are divided into a variety of biomass heating furnace, biomass cooking and heating stove, biomass hot water boiler, biomass boiler, and so on, biomass fuels are agricultural and forestry wastes are processed to form a high density of particles or lump fuels are Biomass energy as a fuel for the boiler called biomass boiler, divided into biomass steam boiler, biomass hot water boiler, biomass hot air furnace, biomass heat transfer oil furnace, and so on.

　　Biomass Boiler

　　Biomass boiler is a boiler called biomass boiler which is fueled by biomass energy, and is divided into biomass steam boiler, biomass hot water boiler, biomass hot air furnace, biomass heat transfer oil furnace and so on.

　　Types of biomass boilers

At present, biomass boilers are roughly divided into two categories according to their uses: one is biomass heat boiler, and the other is biomass electric energy boiler.

　　In fact, the principle of the two are basically the same, are through the combustion of biomass fuel to obtain energy, just the first direct access to thermal energy, the second will be converted into thermal energy and electrical energy. In these two types of boilers, the first is now the most widely used, more mature technology.

　　If you continue to subdivide, the first boiler — — biomass heat boiler, can also be divided into three categories:

　　The first category: small biomass heat boilers. This type of boiler uses cured or gasified biomass fuel to provide thermal energy in the form of hot water, it has the advantage of small size, simple structure, low price; the disadvantage is that the energy loss is large, fuel consumption is large, the supply of thermal energy is low, can not meet the heat demand of large users, this type of boiler targeting single-family rural households for heating and domestic hot water supply. Such as Hunan Zhangjiajie's three wood energy companies.

　　The second category: medium-sized biomass heat boilers. This type of boiler mainly uses cured biomass fuel to provide hot water or steam. Its advantage is that the technology is more mature, energy loss is small, and the heat supply capacity is strong; the disadvantage is that part of the boiler fuel coking, supporting the design is unreasonable. At present, Shandong Hill Biomass Energy Company's "spiral wind-fin burner technology" is a good solution to the medium-sized biomass boiler combustion insufficiency, coking and other phenomena.

The third category: large biomass heat boilers. This type of boiler does not have actual products, mainly because the existing technology is not perfect, and for biomass instead of coal-fired national policy is not sound, therefore, only stays in the concept. It emphasizes a centralized management, centralized control of thermal engineering, boiler only as one of the equipment to ensure the normal operation of the entire biomass thermal engineering, therefore, it is on the fuel, combustion technology, supporting technology, related policy requirements are very high.

As for the cost, it depends on whether you have enough fuel sources there and whether the price is right. Biomass boiler product features :

　　1, energy saving and environmental protection: the fuel used in the boiler itself belongs to the national support for the promotion of new biomass fuels, belonging to the energy saving and environmental protection of renewable resources, a wide range of sources, affordable. Rauschert biomass gasification hot water boiler is a reasonable structural design of the boiler so that the maximum efficiency of biomass fuel gasification and complete combustion, equipped with a special dust collector, to achieve the effect of complete combustion without smoke. Its operating cost is one-sixth of the electric boiler, is one-third of the oil, gas boiler.

　　2、Control system: installed with microcomputer control system, with temperature setting, cycle control and fault alarm and other functions, easy to use and operate.

　　3, a high degree of automation: the use of advanced screw rotary drive automatic feeding device and burner automatic ignition system, only a one-time storage silo full, can be 1-3 days without adding fuel. Greatly reduce the stoker's labor intensity, so that the boiler is more humane.

4, safety: Rauschert biomass gasification hot water boiler is atmospheric hot water boiler, is running at atmospheric pressure, does not require annual inspection, does not require professional stoker personnel to operate. Its reasonable boiler structure and special combustion method is from the source to solve the coking and clogging phenomenon.

　　5, hot water boiler internal hot dip galvanized treatment, can provide clean hot water for domestic use. 6, the boiler adopts the overall insulation to reduce heat loss, and improve the thermal efficiency of the boiler.

　　7, the overall structure of the boiler is compact, small size, no draft device without erecting a tall chimney, easy to install, very low failure rate, no noise.

　　8, the complete combustion of fuel after the end of only a small amount of powdered ash residue, easy to deal with. Biomass boiler is specialized in burning biomass molding fuel a boiler, he runs environmentally friendly, fuel saving, is now more advocated the use of boilers, biomass boilers are divided into a variety of biomass heating furnace, biomass cooking and heating stove, biomass hot water boiler, biomass boiler, and so on, biomass fuels are agricultural and forestry wastes are processed to form a very high density of particles or lump fuels.

Biomass fuel

　　Biomass fuels are mostly stem crops processed to produce a block of environmentally friendly new energy, its diameter is generally 6 to 8 centimeters, the

　　The length is 4~5 times of its diameter, the crushing rate is less than 1.5%~2.0%, the moisture content of the dry base is less than 10%~15%, the ash content is less than 1.5%, the sulfur and chlorine content are less than 0.07%, and the nitrogen content is less than 0.5%. If additives are used, they should be agricultural and forestry products, and the type and quantity used should be indicated. The EU standard does not provide a specific value for the calorific value of biomass fuels, but requires sellers to label it. The Swedish standard requires that the calorific value of biomass fuels should generally be on the order of 16.9 MJ.

　　Biomass liquid fuels include biomass alcohol (ethanol), biodiesel and biomass fuel oil: material ethanol is mainly composed of carbon, hydrogen and oxygen elements; biodiesel is mainly composed of carbon, hydrogen and oxygen elements; biomass fuel oil is mainly composed of carbon, hydrogen and oxygen elements.

　　Different fuels, produce different calorific value, such as wood chips particles calorific value: 4300-4800 calories / kg, corn stover particles calorific value: 3500-3800 calories / kg, after compression or more resistant to burning, whether the fuel smokes, is dependent on the combustion equipment manufacturing process to decide on, combustion equipment manufacturing process Reasonable, full combustion, basically will not smoke, on the contrary, will smoke. Straw cut a section of 1cm long can produce pellets, density of 1.1, without adding special formulas. It is understood that the pellet machine of Guangzhou Xinwantuo Company is better, and has passed the test of Rural Energy Industry Association in Tianjin.

　　Biomass gaseous fuels are mainly carbon monoxide, hydrogen, methane, unsaturated hydrocarbons and non-combustible components of carbon dioxide, nitrogen, etc., so the elements are composed of carbon, hydrogen, oxygen, nitrogen, etc. Does burning biomass fuels increase greenhouse gases?

　　Does burning biomass fuels increase greenhouse gases? No!

Because biomass fuels consume CO2 during their production, which exactly offsets the CO2 produced during their combustion, it is somewhat different for fossil fuels, which also consume CO2 during their production and produce O2, but the O2 they produce has become part of the Earth's atmospheric environment over a long period of time, to which mankind and other modern-day organisms have adapted. If these fossil fuels are extracted and burned now, it will inevitably return the atmosphere to ancient times.

　　In addition, the CO2 produced by burning fossil fuels is not easy to be removed artificially, some people propose to reduce emissions and then eliminate CO2 through the light and action of forests and grasslands, but in reality this is not feasible, because the light and action of absorbing CO2 to produce O2 and carbohydrates, although a part of the CO2 is consumed, but with the respiration or combustion, it will produce the same amount of CO2. so this method does not remove the excess CO2. method does not remove the excess CO2 unless a portion of the carbohydrates are artificially buried deep underground and isolated from the air.

　　Calorific value of biomass fuels: Different sources of biomass have different calorific values and packing densities.