1. Biogas Composition

Biogas Burner Overview: Biogas is a combustible gas produced by the anaerobic fermentation of organic matter under specific temperature, humidity, and acidity conditions in the absence of air (e.g., using a biogas digester).

The main component of biogas is methane. Biogas is composed of 50%～80% methane (CH4), 20%～40% carbon dioxide (CO2), 0%～5% nitrogen (N2), less than 1% hydrogen (H2), less than 0.4% oxygen (O2), and 0.1%～3% hydrogen sulfide (H2S). Due to the presence of a small amount of hydrogen sulfide, it has a slight odor. Its properties are similar to natural gas. If the air contains 8.6～20.8% (by volume) biogas, an explosive mixture will be formed.

2. Biogas Properties

The main component of biogas, methane, is colorless and odorless and burns when mixed with the right amount of air. The calorific value of one cubic meter of pure methane is 34000 kJ, and the calorific value of one cubic meter of biogas is approximately 20800-23600 kJ. That is, the complete combustion of 1 cubic meter of biogas can produce the same amount of heat as 0.7 kg of smokeless coal. Compared with other fuel gases, it has better explosion resistance and is an excellent clean fuel.

Biogas is a renewable clean energy source that can replace traditional biomass energy sources such as straw and firewood, as well as commodity energy sources such as coal, with significantly higher energy efficiency than straw, firewood, and coal. Biogas can also be used for power generation. Large and medium-sized biogas projects can use biogas for power generation, boiler heating, food processing, heating, or residential use. It is a renewable, multi-functional, and inexpensive energy source. The utilization of biogas can alleviate energy shortages and reduce China's dependence on foreign energy. It has great practical significance for developing a low-carbon and environmentally friendly economy and establishing a resource-saving society.

3. Biogas Application Scenarios

Biogas is mainly used in heating equipment such as hot air furnaces and boilers. Zhongwei Company has developed various types of burners to meet the production needs of various application scenarios for low calorific value chemical gas characteristics. Mainly used in boilers, dryers, hot air furnaces, and incinerators. Control systems such as damper-adjustable proportional type, frequency conversion adjustable proportional type, touch screen digital control, and PLC frequency conversion proportional control can be configured according to user requirements.

1. Ignition Method: Uses an open flame ignition method with a dedicated ignition gun.

2. Flame Detection Method: UV ultraviolet detection, equipped with dual-probe flame detection, flameout protection, automatic ignition, valve leak detection, over-temperature and over-pressure protection, and status parameter display functions.

3. The combination of internal mixing combustion technology and swirl combustion technology achieves safe, stable, and complete combustion of low calorific value fuel.

4. A safety protection and adjustment system can be configured to realize programmed ignition, automatic adjustment, and fault protection functions.

5. The valve group is designed with double shutoff, and the flame detection uses a dual-probe detection function to ensure stable combustion of the equipment.

6. If the biogas pressure is low, a backfire prevention device is designed in the pipeline to prevent biogas from burning in the pipeline and causing explosions. A double electric regulating valve is used, and a segmented fire type, damper-adjustable proportional type, frequency conversion adjustable proportional type, touch screen digital control, or PLC frequency conversion proportional control system can be configured according to user requirements.

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