Principle Introduction

The biogas produced by anaerobic fermentation process contains about 55% CH ₄ and 45% CO ₂, as well as a small amount of H ₂ S, H ₂ O and other gas components. Through separation and purification, the CH ₄ concentration can be increased to over 95% to prepare product gas that meets national natural gas standards. The biogas separation and purification system is divided into two parts: pretreatment and membrane separation. The preprocessing part includes multi-stage filtration, refrigerated dryer, heat exchanger, etc., which can filter solid impurities in biogas to 0.01 µ m, away from dew point, and adjust the gas to the appropriate temperature for membrane separation equipment operation. The membrane separation part utilizes the different dissolution and diffusion rates of various gas components in the polymer membrane, resulting in different permeation rates of each gas component through the fiber membrane wall under the action of the pressure difference on both sides of the membrane, thus achieving the goal of separating specific gas components. In biogas, H ₂ S, CO ₂ and other gases are called "fast gases" and separated through membranes, while CH ₄ is called "slow gas" and collected as product gas. Lide Company's membrane separation equipment uses a combination of multi-stage membrane modules with high separation coefficients to improve recovery rates and product gas purity, while reducing losses.

Performance characteristics

● Less moving parts, small footprint, low maintenance requirements, and reliable system

After a relatively short startup time, the product's gas design specifications can be met

Efficient preprocessing system ensures long-term stable operation of the system

The design lifespan of the membrane system exceeds ten years

Multi stage membrane combination process to improve recovery rate and product gas purity

Excellent after-sales service team support

technical parameter

Applicable raw gas flow rate: 3000-40000 Nm ³/d

● Inlet temperature: 30 ℃

● Inlet pressure: atmospheric pressure

Product gas recovery rate: ≥ 97%

Product gas CH ₄ concentration: ≥ 97%

Other indicators meet the Class II gas indicators of the national natural gas standard (GB17820-2012)