Biogas flares are mainly composed of key parts such as the burner head, ejector, ignition system and control system. When the biogas from the biogas tank or biogas treatment system reaches a specific pressure threshold, the biogas is transported to the burner head of the flares through a pipeline. At this time, the control system senses the pressure signal and issues a command to the ignition system. The ignition system generates an ignition source with high-energy electric sparks or other reliable methods to instantly ignite the biogas entering the burner head. At the same time, the ejector uses the Venturi effect to introduce the surrounding air into the burner head at high speed and fully mix it with the biogas. This mixing action ensures that the biogas can obtain sufficient oxygen supply during the combustion process, thereby achieving efficient and complete combustion.