Biomass energy is a direct source of energy for humans. Before large-scale utilization of coal fuel in the 18th century, humans mainly relied on wood as fuel. The energy stored in biomass is quite amazing. According to biologists' estimates, the total amount of biomass energy grown on the Earth each year is about 1400-180 billion tons (dry weight), equivalent to 10 times the current world's total energy consumption. China is also extremely rich in biomass energy, for example, the annual amount of straw is about 800 million tons, equivalent to about 500 million tons of standard coal. The amount of firewood and forestry waste is also large, with forestry waste (excluding charcoal forest) reaching approximately 3700m3 per year, equivalent to 20 million tons of standard coal.
Biomass combustion is a traditional utilization method, but its thermal efficiency is low, labor intensity is high, and pollution is serious. Biomass energy conversion technology can efficiently utilize biomass energy to produce various clean fuels, replacing fuels such as coal, oil, and natural gas; It can also be used to produce electricity, reduce dependence on mineral energy, protect national energy resources, and reduce environmental pollution caused by energy consumption.
Biomass gasification refers to a thermochemical conversion process that converts biomass solid feedstock into biomass gas through thermal decomposition or incomplete combustion in a high temperature environment without oxygen or oxygen deficiency. In rural areas, biomass gas can be used for cooking or winter heating; In industry, biomass gas can directly drive industrial boilers to produce steam. Purified biomass gas can also drive power generation units to generate electricity for areas lacking electricity.
Biomass gasification power generation process flow
Biomass gasification technology has changed the traditional way of directly burning biomass to obtain energy. Through gasification technology, biomass is transformed into clean combustible gas, greatly improving the range of use of biomass energy. Biomass gasification technology has the following unique advantages:
Massiveness and universality: Biomass is a ubiquitous and inexpensive energy source that is easy to obtain and simple to produce.
Renewableity: Biomass energy is an ideal renewable energy source. As long as solar radiation energy exists, the photosynthesis of green plants will not stop, and biomass energy will never be exhausted.
Environmental friendliness: Using biomass energy as energy can reduce environmental pollution. Biomass raw materials are mainly agricultural and forestry wastes, which can pollute the environment by piling up and rotting, breeding bacteria, mosquitoes, and producing harmful and odorous gases such as hydrogen sulfide and methane, both occupying land resources and polluting the environment.
Cleanliness: Using biomass for power generation utilizes organic substances in plants. The carbon dioxide emitted by the system will be absorbed by the growth of plants in the next season, so it does not increase the content of carbon dioxide in the atmosphere, and can achieve "zero emissions" of carbon dioxide.
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