What are the advantages of fuel made from straw compared to coal?

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Hello, I'm Science Fun, and I'm here to answer the question of what are the advantages of straw as a fuel, and what's better about it compared to coal.

Straw, as the name suggests, is a crop of wheat straw

Straw fuel is a green, environmentally friendly renewable energy, and compared to coal straw can do no pollution, zero emissions, environmental protection features.

As we all know, although coal has a high calorific value, it is more polluting and produces a lot of coal residue, which is not only not effectively utilized, but also puts pressure on the social environment. Nowadays, our country has entered the era of banning coal, and we are gradually shifting to the field of clean energy. Environmental protection is now the theme of this era, coal is a non-renewable resource, used up and no longer, and pollution, so environmentally friendly renewable energy fuel is definitely the future direction of development.

So where are the advantages of straw?

Straw as a fuel, in addition to reducing carbon emissions, to protect the environment, there is also the advantage of its renewable, and in addition to straw, like a variety of crops, wood chips, sawdust, peanut shells, corn cobs, straw, wheat straw and wheat chaff, twigs and leaves, licorice, and other modern and clean fuels, are not required to additives and binders.

These materials, not only can solve the basic energy problems of rural life can also improve the income of farmers, although in the combustion value and calorific value than coal, but has been able to fully meet the basic needs of mankind.

Let's talk about coal.

Coal is a solid, combustible mineral that is formed when ancient plants are buried underground and undergo complex biochemical and physicochemical changes. The calorific value of coal is very high, can be as high as 5000-6000 calories, but the burning of coal brought about by carbon dioxide, sulfur dioxide emissions are more serious, because of the lack of environmental protection, coupled with the non-recyclable and non-renewable energy more than is now banned by the state mining use.

The final comparison between coal and straw:

Straw is a biofuel, the volume can be compressed, saving the storage space and also easy to transport, reducing transportation costs

And the combustion efficiency is high, easy to burn out, the amount of carbon residue is very small. In the combustion will not produce sulfur dioxide and carbon dioxide and other harmful gases, has the benefit of environmental protection.

The traditional fuel coal, large size, can not be compressed, very occupied storage space, and transportation costs are relatively high, in the combustion is not only not easy to ignite, and combustion will produce a lot of sulfur dioxide and phosphorus pentoxide and other harmful gases, the most common problem is to lead to the generation of acid rain, the atmospheric manipulation of the destruction of pollution of the environment.

So in comparison, coal has a higher calorific value than straw, and nothing is better than straw.

The calorific value of corn stover is about 0.7 to 0.8 times that of coal, i.e. 1.25t of corn stover molding fuel block is equivalent to the calorific value of 1t of coal, and corn stover molding fuel block is burned in the supporting under-fired biomass combustion furnace, and the combustion efficiency is 1.3 to 1.5 times that of a coal-fired boiler, so the calorific utilization of 1t corn stover molding fuel block is comparable to 1t of coal. Therefore, the heat utilization rate of 1t of corn stover forming fuel block is comparable to that of 1t of coal. From the point of view of the output of straw resources, the vast rural areas and townships have a large output and wide range of various kinds of straw. Straw after hot press molding to reach a certain density and then burned to improve the combustion temperature and heat utilization rate to reduce the pollution of the air environment, combustion speed, saving time, can make the straw become a high-grade energy products to be utilized. From the environmental point of view, it is more in line with the national environmental protection policy, and from the cost point of view, the cost is lower, and it can completely replace coal as boiler fuel.

The calorific value of ordinary coal is about 5000 kcal/kg, and the calorific value of straw molding fuel is about 3000-3500 kcal/kg. However, if the combustion of small and medium-sized boilers, the exhaustion rate of coal is lower than that of molding fuels, the efficiency is lower than that of molding fuels, and environmental protection index is lower than that of molding fuels, and the scope of use in large and medium-sized cities is not as wide as that of molding fuels, so that the state attaches importance to and promotes them. The degree of national attention and promotion also tends to molded fuel - green! Molded fuel can generally be sold to small and medium-sized boiler users, environmental requirements of high towns. For example, bathing centers, district heating, independent heating, greenhouses in the north, remote schools, and even high-end villas and so on.