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1、干法脱硫
1. Dry desulfurization
干法脱除沼气气体中硫化氢（H2S）的设备基本原理是以O2使H2S 氧化成硫或硫氧化物的一种方法，也可称为干式氧化法。干法设备的构成是，在一个容器内放入填料，填料层有活性炭、氧化铁等。气体以低流速从一端经过容器内填料层，硫化氢（H2S）氧化成硫或硫氧化物后，余留在填料层中，净化后气体从容器另一端排出。
The basic principle of the equipment for dry removal of hydrogen sulfide (H2S) from biogas gas is a method of oxidizing H2S to sulfur or sulfur oxides using O2, also known as dry oxidation method. The composition of the dry process equipment is to put fillers in a container, and the filler layer includes activated carbon, iron oxide, etc. The gas passes through the packing layer inside the container at a low flow rate, and hydrogen sulfide (H2S) is oxidized to sulfur or sulfur oxides, remaining in the packing layer. After purification, the gas is discharged from the other end of the container.
2、湿法脱硫
2. Wet desulfurization
湿法脱硫可以归纳分为物理吸收法、化学吸收法和氧化法三种。物理和化学方法存在硫化氢再处理问题，氧化法是以碱性溶液为吸收剂，并加入载氧体为催化剂，吸收H2S，并将其氧化成单质硫，湿法氧化法是把脱硫剂溶解在水中，液体进入设备，与沼气混合，沼气中的硫化氢（H2S）与液体产生氧化反应，生成单质硫吸收硫化氢的液体有氢氧化钠、氢氧化钙、碳酸钠等。成熟的氧化脱硫法，脱硫效率可达99.5％以上。
Wet desulfurization can be classified into three types: physical absorption method, chemical absorption method, and oxidation method. There is a problem of hydrogen sulfide reprocessing in physical and chemical methods. The oxidation method uses alkaline solution as the absorbent and oxygen carrier as the catalyst to absorb H2S and oxidize it into elemental sulfur. The wet oxidation method dissolves the desulfurizer in water, and the liquid enters the equipment and mixes with biogas. The hydrogen sulfide (H2S) in biogas reacts with the liquid to produce elemental sulfur. The liquids that absorb hydrogen sulfide include sodium hydroxide, calcium hydroxide, sodium carbonate, etc. The mature oxidation desulfurization method can achieve a desulfurization efficiency of over 99.5%.
在大型的脱硫工程中，一般采用先用湿法进行粗脱硫，之后再通过干法进行精脱硫。
In large-scale desulfurization projects, the wet method is generally used for coarse desulfurization first, and then the dry method is used for fine desulfurization.
沼气脱硫器是一种沼气应用装置，其特征在于脱硫瓶内的进气口上连接一个悬空的多孔管，多孔管尽可能长地横向伸入脱硫瓶内腔，多孔管上密布小孔，小孔的孔径小于氧化铁小颗粒的直径。
The biogas desulfurizer is a biogas application device, characterized by a suspended porous tube connected to the inlet of the desulfurization bottle. The porous tube extends horizontally into the inner cavity of the desulfurization bottle as long as possible, and is densely covered with small holes. The diameter of the small holes is smaller than that of the iron oxide particles.
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This article is from: Biogas Purification. For more content, please click: https://www.hneee.net We will provide satisfactory service for the questions you ask. Welcome to call us!
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