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沼氣提純的工作步驟
The working steps of biogas purification
沼氣提純的工藝流程主要包括以下幾個步驟：
The process flow of biogas purification mainly includes the following steps:
原料準備。首先，將原料沼氣送入水分離器以去除游離水和雜質，然后進入脫硫塔脫除硫化氫。這一步驟是必要的，因為硫化氫的存在會影響后續的提純過程。
Preparation of raw materials. Firstly, feed the raw biogas into the water separator to remove free water and impurities, and then enter the desulfurization tower to remove hydrogen sulfide. This step is necessary because the presence of hydrogen sulfide can affect the subsequent purification process.
壓縮和緩沖。脫硫后的沼氣經過解吸氣回收罐、壓縮機前緩沖罐的緩沖后，進入沼氣壓縮機進行壓縮。壓縮的目的是提高氣體流量和濃度，便于后續的處理。
Compression and buffering. After desulfurization, the biogas is buffered by the desorption gas recovery tank and the buffer tank in front of the compressor before entering the biogas compressor for compression. The purpose of compression is to increase gas flow rate and concentration for subsequent processing.
吸收。壓縮后的沼氣進入吸收塔，在這里，利用有機胺溶液與二氧化碳發生物理化學吸收反應，從而去除大部分二氧化碳。這一步驟可以有效降低沼氣中二氧化碳的濃度。
Absorption. The compressed biogas enters the absorption tower, where it undergoes a physical and chemical absorption reaction with carbon dioxide using an organic amine solution, thereby removing most of the carbon dioxide. This step can effectively reduce the concentration of carbon dioxide in biogas.
脫水。經過吸收塔處理后的沼氣進入脫水裝置，將水露點降至-65℃，以確保最終產品的干燥度。
Dehydration. After being treated by the absorption tower, the biogas enters the dehydration unit, reducing the water dew point to -65 ℃ to ensure the dryness of the final product.
最終處理和提純。脫水后的沼氣進入天然氣壓縮機進行最后壓縮，然后進入加氣柱給槽車加氣，完成提純過程。
Final processing and purification. The dehydrated biogas enters the natural gas compressor for final compression, and then enters the gas column to add gas to the tank truck, completing the purification process.
以上每個步驟都對最終提純效果有重要影響，特別是在去除二氧化碳方面，吸收法和壓縮機法是關鍵技術。
Each of the above steps has a significant impact on the final purification effect, especially in the removal of carbon dioxide, where absorption and compressor methods are key technologies.
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2024-05-09
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