What is rice husk gasification?

The rice husk, also called rice hull, is the coating on a seed or grain of rice. Each kg of milled white rice results in roughly 0.28 kg of rice husk as a by-product of rice production during milling.

What are the common products of Rice husk?
1. Solid fuels (bulk, agglomerates, pellets): Rice husk in its loose form is mainly used for energy production, such as combustion and gasification. Combustion is the process of burning carbon in the rice husk, which releases CO2 and generates heat for further use. One of the most efficient uses of this by-product is direct combustion without the use of a heat exchanger with a proper furnace to generate heat to dry the rice. Gasification is the process of converting rice husk into synthesis gas (syngas) in a gasification reactor with a controlled amount of air. Syngas can be used as a fuel for drying and cooking, or for electricity generation in cogeneration systems. Rice husk briquettes and pellets are produced using densification to increase the density of the material and its combustion properties. These densified rice hulls are mainly used in industrial boilers as an alternative to fossil fuels.

2.Carbonized rice husk produced after combustion: This is created when rice husk thermally decomposes at relatively low temperatures (below 700°C), with a constrained amount of oxygen (O2). Carbonization creates biochar, which can be utilized as activated carbon, processed fertilizer, and other things.

3.After combustion, there is still rice husk ash: It is an outcome. The efficiency of combustion determines how much carbon is left in the ash (i.e., complete or incomplete combustion). Ash from rice husks can be added to cement, steel, and other materials as well as utilized to improve soil. However, compared to the entire output of rice husk, only a small portion is utilized for these uses.

What is the basic principle of rice husk gasification for power generation?
The process of turning rice husks and hulls into flammable gas is known as rice husk gasification. After that, it fuels a gas engine, which produces electricity. Biomass gasification has successfully overcome the disadvantages of low combustibility and wide diversity of rice husk biomass. The biomass gasification technology is environmentally friendly and has a minor environmental impact. It is among the best methods for using biomass.

What is the process of rice husk gasification power plant process?
1. Biomass gasification, converting rice husk into syngas.

2.Syngas purification. The generator gas from the gasifier usually contains dust, coke, tar and other pollutants, which will be removed by the purification system to ensure the normal operation of the gas engine.

3.Gas engine power generation. (The high temperature exhaust gas can be reused in a waste heat boiler to generate steam or hot water for residential or industrial use). The steam turbine can also be considered for a gas-steam combined cycle power plant, which will increase the total efficiency.

What are the advantages of rice husk power generation?
Waste rice husk from grain processing is used in rice husk power generation. This material is burned in a gas generator to create steam, which is then filtered and purified with water to create pure gas. Pure gas is then sent back to the gas generator to do work and drive the generator to produce electricity. The use of rice husks to generate electricity has benefits.

1.Rice husk has substantial ecological advantages over fossil fuels and can be used as a source of energy.

2.Rice husk power generation works on a straightforward, user-friendly concept.

3.Rice husk has enormous expansion potential

4.Low cost, rapid return, and straightforward promotion

5.Using rice husks to generate electricity, turning trash into gold, increasing farmer income, and lowering pollution

What is the prospect of rice husk power generation?
Rice husk electrification power generation technology refers to the conversion of rice husk into gaseous fuel in the gasifier, and then directly into the gas engine after purification or directly into the fuel cell to generate electricity. One of the key technologies of rice husk power generation is gas purification. The gas from gasification contains certain impurities, including ash, coke and tar, etc., which need to be removed by purification system to ensure the normal operation of power generation equipment. The main technologies are fixed-bed gasification and fluidized-bed gasification, which use a variety of wood, forestry residues and rice husks to produce combustible gas mainly for power generation. It is expected that rice husk gasification for power generation will be one of the fastest growing new industries in China in the coming decades. In general, biomass power generation will dominate among renewable energy sources until 2025. In the future, power generation from biomass renewable energy has become one of the important ways to solve the energy shortage.