Notes

Application of biomass boiler and wood pellet gas<br>
Under the stress of environmental protection and also power crisis, numerous nations has carried out plans to reduce discharge and also advertise brand-new energy. Under this problem, increasingly more coal-fired boilers have been replaced by, or upgraded right into biomass boiler




Traditional coal-fired boilers produce a great deal of black smoke and also sulfur gas. Some of them are not geared up with desulfurizer. They will contaminate the surrounding locations. To change them with gas and electricity needs too much efforts as well as price, numerous coal-fired central heating boiler owner use biomass fuel to change coal. Considering most coal-fired central heating boilers are unfit for biomass fuel, there are specific biomass fuel burning tools to fix this issue. They are developed based on the attributes of biomass gas and also minimize the toxin emission.



Different types of biomass pellet central heating boiler

Biomass boiler adopts biomass power, usually biomass pellets, as fuel. According to different power media, they can be categorized into biomass heavy steam central heating boiler, biomass hot water central heating boiler, biomass hot blast oven, biomass thermal oil heating system.



According to their objective, biomass boilers can be categorized into biomass thermal central heating boiler and biomass electric power central heating boiler They both produce power by shedding biomass fuels. Biomass thermal boiler use thermal power, while biomass electric power boiler turn the thermal energy right into electrical power. Biomass thermal boiler is still one of the most preferred kind, whose technology is fully grown.



According to the scale, biomass thermal boiler can be classified into 2 kinds.



Small biomass central heating boiler

These central heating boilers utilizes solid or gasified biomass gas They produce heat in the form of warm water. Small biomass central heating boiler features little volume, straightforward framework, affordable price, yet it has reduced energy conversion effectiveness and low energy supply. Small biomass central heating boiler is primarily for residence heating in rural areas and also warm water supply.



Large biomass central heating boiler.

These kind of biomass boiler use strong biomass gas and give warm water or steam. The innovation is mature, the power supply is high, as well as the energy loss is low. However some biomass boiler has gas cocking owing to not enough burning, and the support facility is not best.



Basic material for biomass boiler.

Biomass central heating boiler has vast resource of raw materials. All photosynthetic plants can be used as raw materials, including sawdust, timber chips, rice husk, sunflower seed covering, sorghum stalk, corn stalk, bean stalk, and so on. By high-heat and high-pressure processing in the molding tools, these biomass materials are built into columnar biomass fuel. They are fed into biomass boilers to generate warmth.



Two usual biomass fuels.

Normally, biomass molding gas has 2 kinds-- biomass briquettes as well as timber pellet fuel. The length of biomass briquettes is greater than 15cm, the diameter is 30-40mm. They are made by biomass briquette press. grass pelletizer is 6-8mm in size. They are made by timber pellet mill. Timber pellet gas gradually replace biomass briquettes owing to high thickness, vast application and also hassle-free making use of. They burns a lot more sufficiently than biomass briquettes.



Biomass pellet fuel has fiber content of 70%. The sulfur material is far lower than coal High thickness makes it convenient to shop as well as transport. It can be used in various tools. Biomass pellets burns adequately, with much less smoke and also ash web content, and also the burning rate is 11% higher than coal.



Advantages of wood pellet gas over coal.

Low carbon content: biomass gas has at a lot of 50% carbon content, so the heat worth is lower than coal.

High hydrogen content: biomass gas has more volatiles, so they are much easier to burn. The carbon as well as hydrogen are integrated right into low molecular hydrocarbon, which will certainly separate out volatiles at heat.

High oxygen web content: biomass gas has even more oxygen web content than coal, so the warmth value is reduced.

Reduced thickness: the density of biomass fuel is lower than coal. Loosen up texture makes it simpler to burn out. The recurring carbon is lower than coal ash.

Low sulfur content: the sulfur content in biomass fuels are less than 0.12%. You do not require to mount desulfurizer device.

Reduced carbon emission: biomass fuel is carbon-neutral, in other words, absolutely no carbon discharge

Waste reuse: the adoption of biomass gas can make complete use of wastes, as well as alleviate their damages to setting. Besides, used pellet mill for sale after melting can be used to produce plant food.

Combined firing: Biomass gas can be burned together with coal and also enhance the combustion efficiency.



Biomass central heating boiler air pollution discharge.

Biomass central heating boiler produce small quantity of air pollutants, and also solid waste that can be reused.



Polluting gases

Biomass fuel produces little NOx and also no Co2. The SO2 emission is lower than 33.6 mg/m3, and the smoke and also ash emission is less than 46mg/m3. They are far lower than the nationwide requirement.




Strong waste

The main solid waste of biomass central heating boiler is ash. They can be recycled by made into potash fertilizer.



By gearing up the biomass boiler with desulfurizing and also dust eliminating device, we can minimize the contaminant emission to minimum.



Environmental benefits of biomass central heating boiler

To change coal with biomass gas, we can reduce the pollutant discharge in ambience. Meanwhile, the net carbon emission of biomass gas is zero, which can relieve greenhouse effect.



Adoption of biomass gas is a reliable means to make use of the plant waste. If these plant waste degeneration under natural condition, they will certainly create a lot of methane, which has greater greenhouse effect. By making them right into gas, we can transform waste into wide range.



The residual ash after shedding can be made use of as potash plant food. This way, we attain the power reuse among straw-- gas-- fertilizer.


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