传统午夜黄色视频在线观看利用方式单一，大多用于发电或炊事，经济效益有限。午夜黄色视频在线观看提纯技术的成熟，正在打开一扇新的大门——将午夜黄色视频在线观看净化为生物天然气，并入天然气管网或用作车用燃料，实现从“低值利用”到“高值利用”的跨越。

The traditional utilization of biogas is single and mostly used for power generation or cooking, with limited economic benefits. The maturity of biogas purification technology is opening a new door - purifying biogas into bio natural gas, integrating it into natural gas pipelines or using it as vehicle fuel, achieving a leap from "low value utilization" to "high-value utilization".

午夜黄色视频在线观看提纯的核心任务是去除二氧化碳。 午夜黄色视频在线观看中甲烷含量通常在50-70%，其余主要是二氧化碳。提纯的目标是将甲烷浓度提升至97%以上，使其达到天然气标准。目前主流的提纯技术包括膜分离法、变压吸附法和水洗法。

The core task of biogas purification is to remove carbon dioxide. The methane content in biogas is usually between 50-70%, with the rest mainly being carbon dioxide. The goal of purification is to increase the methane concentration to over 97% to meet natural gas standards. The current mainstream purification technologies include membrane separation, pressure swing adsorption, and water washing.

膜分离技术以其环保的特点受到关注。 膜材料利用不同气体分子在膜中的渗透速率差异，实现甲烷与二氧化碳的分离。聚酰亚胺中空纤维膜是目前应用较广的膜材料，通过三级膜分离流程，可获得甲烷含量高于97%的生物天然气。膜技术的优势在于分离效率高、占地面积小、能耗较低、操作简便。

Membrane separation technology has attracted attention for its high efficiency and environmental friendliness. Membrane materials utilize the differences in permeation rates of different gas molecules in the membrane to achieve the separation of methane and carbon dioxide. Polyimide hollow fiber membrane is currently a widely used membrane material, which can obtain bio natural gas with methane content higher than 97% through a three-stage membrane separation process. The advantages of membrane technology lie in high separation efficiency, small footprint, low energy consumption, and easy operation.

变压吸附法是另一条成熟路线。 以中国石油西南油气田与舍得酒业的合作项目为例，该项目以酿酒废水为原料，通过“湿式脱硫+PSA（变压吸附）”工艺提纯制备生物天然气，各项指标均达到《生物天然气》一类燃气标准，可通过管网实现互联互通。这一国产午夜亚洲精品午夜鲁丝片标志着生物天然气商业化模式的成熟。

Pressure swing adsorption is another mature route. Taking the cooperation project between PetroChina Southwest Oil and Gas Field and Shede Liquor Industry as an example, the project uses brewing wastewater as raw material and purifies and prepares bio natural gas through the "wet desulfurization+PSA (pressure swing adsorption)" process. All indicators meet the first-class gas standards of "bio natural gas" and can be interconnected through pipeline networks. This case marks the maturity of the commercialization model for biogas.

经济效益是提纯技术的核心驱动力。 午夜黄色视频在线观看提纯生产CNG，甲烷纯度≥97%，回收率≥99%，总提纯成本约为每方甲烷1.2-1.6元。而工业燃气售价通常在3-6元/方，城市燃气售价2-3元/方，与午夜黄色视频在线观看直接发电相比具有更好的经济效益。随着天然气管网覆盖范围扩大和碳交易市场完善，午夜黄色视频在线观看提纯正成为越来越多项目的路线。

Economic benefits are the core driving force of purification technology. Biogas purification produces CNG, with methane purity ≥ 97% and recovery rate ≥ 99%. The total purification cost is approximately 1.2-1.6 yuan per cubic meter of methane. The price of industrial gas is usually 3-6 yuan/cubic meter, while the price of urban gas is 2-3 yuan/cubic meter, which has better economic benefits compared to direct biogas power generation. With the expansion of natural gas pipeline network coverage and the improvement of carbon trading market, biogas purification is becoming the preferred route for more and more projects.

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