Notes

Application of biomass boiler and timber pellet fuel<br>
Under the pressure of environmental protection and energy situation, several countries has actually accomplished plans to cut discharge and advertise brand-new power. Under this problem, an increasing number of coal-fired central heating boilers have been changed by, or upgraded right into biomass central heating boiler



Conventional coal-fired boilers give off a lot of black smoke and also sulfur gas. Several of them are not furnished with desulfurizer. richi machinery will pollute the surrounding locations. To change them with gas and electrical power calls for excessive efforts and expense, numerous coal-fired boiler proprietor use biomass fuel to replace coal. Thinking about most coal-fired central heating boilers are unsuited for biomass fuel, there are specialized biomass gas burning gadgets to address this trouble. They are developed based upon the characteristics of biomass gas and minimize the contaminant exhaust.



Different sorts of biomass pellet boiler

Biomass boiler embraces biomass energy, typically biomass pellets, as gas. According to various power media, they can be identified right into biomass vapor central heating boiler, biomass warm water central heating boiler, biomass hot blast stove, biomass thermal oil heater.



According to their purpose, biomass boilers can be classified into biomass thermal boiler and biomass electrical power central heating boiler They both produce power by burning biomass fuels. Biomass thermal boiler use thermal energy, while biomass electric power central heating boiler transform the thermal power into electric power. Biomass thermal central heating boiler is still the most preferred kind, whose technology is fully grown.



According to the scale, biomass thermal boiler can be identified into 2 types.



Tiny biomass boiler

These central heating boilers uses strong or gasified biomass fuels They produce warm in the form of warm water. Small biomass boiler features little volume, straightforward framework, low price, yet it has low power conversion performance and also reduced energy supply. Tiny biomass central heating boiler is mainly for house heating in rural areas and also hot water supply.



Large biomass boiler.

These type of biomass boiler usage strong biomass gas and also give hot water or vapor. machine pellet is fully grown, the power supply is high, and also the energy loss is low. Yet some biomass boiler has gas cocking owing to insufficient burning, as well as the assistance center is not ideal.



Resources for biomass boiler.

Biomass central heating boiler has broad resource of raw materials. All photosynthetic plants can be used as resources, including sawdust, wood chips, rice husk, sunflower seed shell, sorghum stalk, corn stalk, bean stalk, and so on. By high-heat as well as high-pressure processing in the molding tools, these biomass materials are molded right into columnar biomass gas. They are fed into biomass boilers to produce warm.



Two common biomass gas.

Generally, biomass molding gas has 2 kinds-- biomass briquettes and wood pellet gas. The size of biomass briquettes is greater than 15cm, the diameter is 30-40mm. They are made by biomass briquette press. Wood pellets is 6-8mm in diameter. They are made by timber pellet mill. Wood pellet fuels slowly fill in biomass briquettes owing to high density, large application and also hassle-free making use of. They burns much more adequately than biomass briquettes.




Biomass pellet gas has fiber content of 70%. The sulfur content is much lower than coal High density makes it hassle-free to store as well as transportation. It can be applied in different equipment. Biomass pellets burns adequately, with less smoke and ash web content, and also the burning rate is 11% more than coal.



Benefits of timber pellet fuel over coal.

Reduced carbon web content: biomass fuels has at most 50% carbon web content, so the warm worth is lower than coal.

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

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

Reduced thickness: the thickness of biomass gas is lower than coal. Loosen structure makes it simpler to burn out. The recurring carbon is less than coal ash.

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

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

Waste recycle: the fostering of biomass fuel can make complete use of wastes, as well as eliminate their damage to environment. Besides, the residual ash after burning can be used to create fertilizer.

Combined firing: Biomass gas can be melted along with coal as well as enhance the combustion performance.



Biomass central heating boiler contamination emission.

Biomass central heating boiler give off small quantity of air toxins, and also solid waste that can be reused.



Contaminating gases

Biomass gas generates little NOx as well as no Co2. The SO2 exhaust is less than 33.6 mg/m3, and also the smoke and ash exhaust is lower than 46mg/m3. They are much lower than the national requirement.



Strong waste

The primary solid waste of biomass boiler is ash. They can be reused by made right into potash fertilizer.




By furnishing the biomass central heating boiler with desulfurizing and also dirt getting rid of device, we can decrease the toxin emission to minimum.



Environmental advantages of biomass central heating boiler

To replace coal with biomass gas, we can reduce the toxin exhaust in atmosphere. On the other hand, the net carbon discharge of biomass gas is no, which can soothe greenhouse effect.



Adoption of biomass fuel is an effective means to use the crop waste. If these crop waste decay under all-natural condition, they will certainly produce a great deal of methane, which has higher pollution. By making them into fuel, we can transform waste into wealth.



The residual ash after burning can be utilized as potash fertilizer. By doing this, we achieve the power recycle among straw-- gas-- plant food.


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