降低天然气温度，使部分水蒸气和重烃凝析成液体，与气流分开，从而降低了天然气中的含水量和重烃组分。Lowering the temperature of the natural gas allows some water vapor and heavy hydrocarbons to condense into liquids that are separated from the gas flow, thereby reducing the water content and heavy hydrocarbon components in the natural gas.