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沼氣提純凈化給我們帶來了什么？

首頁- 新聞資訊 > 行業(yè)資訊

2022-05-27

沼氣凈化的目的是去除對后續(xù)工藝有不利影響的雜質，包括硫化氫和水。沼氣中含有較多的硫化氫和飽和水蒸氣。隨著溫度的降低，水蒸氣凝結成水，與硫化氫分離，對管道和設備造成腐蝕。另外沼氣中的水分會凝結，所以如果管道保溫不好，在冬季很容易形成管道梗塞，影響閥門的正常運行。另外，從環(huán)保的角度來看，用沼氣撲滅硫化氫產生的二氧化硫會污染環(huán)境。

The purpose of biogas purification is to remove impurities that have adverse effects on subsequent processes, including hydrogen sulfide and water. Methane contains more hydrogen sulfide and saturated water vapor. With the decrease of temperature, water vapor condenses into water and separates from hydrogen sulfide, causing corrosion to pipelines and equipment. In addition, the moisture in the biogas will condense, so if the pipe insulation is not good, it is easy to form pipe blockage in winter, affecting the normal operation of the valve. In addition, from the perspective of environmental protection, putting out sulfur dioxide produced by hydrogen sulfide with biogas will pollute the environment.

物理、化學和生物方法可用于去除沼氣中的硫化氫。物理脫硫法一般采用活性炭法；化學脫硫法中干法脫硫常用氧化鐵脫硫劑，化學脫硫法中濕法脫硫常用濕法888脫硫和絡合鐵脫硫。生物法主要指生物脫硫。選擇詳細計劃時，應考慮沼氣中硫化氫的含量和要求的去除水平。

Physical, chemical and biological methods can be used to remove hydrogen sulfide from biogas. Physical desulfurization method generally adopts activated carbon method; Iron oxide desulfurizer is commonly used for dry desulfurization in chemical desulfurization method, and 888 wet desulfurization and complex iron desulfurization are commonly used for wet desulfurization in chemical desulfurization method. Biological method mainly refers to biological desulfurization. When selecting the detailed plan, the content of hydrogen sulfide in biogas and the required removal level shall be considered.

沼氣脫水主要包括重力脫水、低溫冷凝和分子篩等深度脫水。

Biogas dehydration mainly includes gravity dehydration, low-temperature condensation, molecular sieve and other deep dehydration.

沼氣凈化中的脫硫塔通常采用常壓干法脫硫，將氧化鐵脫硫劑置于脫硫塔中進行脫硫；脫硫前通常先脫水，因此在脫硫塔前放置一臺汽水分離器。沼氣進入脫硫塔脫硫前，先經過汽水分離器脫水；設置精細過濾器，設計壓差小，過濾面積大，可攔截細小雜質，滿足應用要求，提高沼氣應用效率。為了避免在運行過程中產生熱量，有時需要在凈化系統(tǒng)中設置冷水機組。氣體輸送泵和阻火器是系統(tǒng)中必不可少的輔助部件。

The desulfurization tower in biogas purification usually adopts atmospheric pressure dry desulfurization, and the iron oxide desulfurizer is placed in the desulfurization tower for desulfurization; Dehydration is usually carried out before desulfurization, so a steam water separator is placed in front of the desulfurization tower. Before entering the desulfurization tower for desulfurization, the biogas shall be dewatered through the steam water separator; Fine filter is set with small design pressure difference and large filtering area, which can intercept small impurities, meet application requirements and improve biogas application efficiency. In order to avoid heat generation during operation, it is sometimes necessary to set a water chiller in the purification system. Gas delivery pump and flame arrester are indispensable auxiliary components in the system.

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