The waste gas primarily consists of organic compounds-such as unsaturated fatty acids and aldehydes-that volatilize during the heating process. The equipment is fitted with a condensation recovery system: high-temperature exhaust gas is first cooled to below 30°C via a shell-and-tube heat exchanger, causing the majority of the organic compounds to condense into liquid and flow back into the oil. Any remaining trace gases are directed to an activated carbon adsorption tower or a bio-filter, where odors are eliminated through microbial degradation or physical adsorption. This process achieves a treatment efficiency of over 95%, ensuring that gas emissions comply with the limits for non-methane total hydrocarbons (NMTHC) set by Beijing's *Integrated Emission Standard of Air Pollutants*.
Noise control is also integrated into the environmental design. The primary noise sources in the oil refining equipment are centrifuges, pumps, and fans. Modern units employ sound-insulating enclosures for high-noise components and feature silencers installed at fan inlets and outlets. For disc-stack centrifuges, which generate significant vibration, vibration-damping bases are installed to prevent structure-borne noise transmission.