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沼氣脫硫器的脫硫原理

1、干法脫硫

1. Dry desulfurization

干法脫除沼氣氣體中硫化氫(H2S)的設(shè)備基本原理是以O(shè)2使H2S 氧化成硫或硫氧化物的一種方法,也可稱為干式氧化法。干法設(shè)備的構(gòu)成是,在一個(gè)容器內(nèi)放入填料,填料層有活性炭、氧化鐵等。氣體以低流速從一端經(jīng)過容器內(nèi)填料層,硫化氫(H2S)氧化成硫或硫氧化物后,余留在填料層中,凈化后氣體從容器另一端排出。

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、濕法脫硫

2. Wet desulfurization

圖層-2

濕法脫硫可以歸納分為物理吸收法、化學(xué)吸收法和氧化法三種。物理和化學(xué)方法存在硫化氫再處理問題,氧化法是以堿性溶液為吸收劑,并加入載氧體為催化劑,吸收H2S,并將其氧化成單質(zhì)硫,濕法氧化法是把脫硫劑溶解在水中,液體進(jìn)入設(shè)備,與沼氣混合,沼氣中的硫化氫(H2S)與液體產(chǎn)生氧化反應(yīng),生成單質(zhì)硫吸收硫化氫的液體有氫氧化鈉、氫氧化鈣、碳酸鈉等。成熟的氧化脫硫法,脫硫效率可達(dá)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%.

在大型的脫硫工程中,一般采用先用濕法進(jìn)行粗脫硫,之后再通過干法進(jìn)行精脫硫。

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.

沼氣脫硫器是一種沼氣應(yīng)用裝置,其特征在于脫硫瓶?jī)?nèi)的進(jìn)氣口上連接一個(gè)懸空的多孔管,多孔管盡可能長(zhǎng)地橫向伸入脫硫瓶?jī)?nèi)腔,多孔管上密布小孔,小孔的孔徑小于氧化鐵小顆粒的直徑。

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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