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沼氣脫硫脫水是如何進行工作?

(1)冷分離法。是利用壓力能變化引起溫度變化,使水蒸氣從氣相中冷凝下來的方法。常用 的有兩種流程:A.節(jié)流膨脹冷脫水法。一般用于高壓燃氣,經(jīng)過節(jié)流膨脹或低溫分離,使 部分水冷凝下來。B.加壓后冷卻法。如凈化氣在0.8MPa壓力下的冷卻脫水。

(1) Cold separation method. It is a method of using pressure energy changes to cause temperature changes and condense water vapor from the gas phase. There are two commonly used processes: A. throttling expansion cold dehydration method. Generally used for high-pressure gas, it undergoes throttling expansion or low-temperature separation to condense some water. B. Pressure followed cooling method. Cooling and dehydration of purified gas at a pressure of 0.8 MPa.

(2)溶劑吸收法。屬于這類脫水溶劑的有氯化鈣、氯化鋰及甘醇類。

(2) Solvent absorption method. Calcium chloride, lithium chloride, and ethylene glycol belong to this type of dehydration solvent.

(3)固體物理吸水法。吸附是在固體表面力作用下產(chǎn)生的,根據(jù)表面力的性質(zhì)分為化學吸附( 脫水后不能再生)和物理吸附(脫水后可再生)。

(3) Solid state physical water absorption method. Adsorption is generated under the action of solid surface forces, and can be divided into chemical adsorption (which cannot be regenerated after dehydration) and physical adsorption (which can be regenerated after dehydration) based on the properties of surface forces.

沼氣脫硫一般可簡單分為干法脫硫和濕法脫硫。

Biogas desulfurization can generally be divided into dry desulfurization and wet desulfurization.

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干法脫硫:沼氣中的有害物質(zhì)主要是硫化氫,它危害人體健康,對管道閥門及應(yīng)用設(shè)備有較強的腐蝕作用。目前,國內(nèi)大部分用戶均未安裝脫硫器,已造成嚴重后果。為減輕硫化氫對灶具及配套 用具的腐蝕損害,延長設(shè)備使用壽命,保證人身健康,必須安裝脫硫器。脫硫原理:在常溫下含有H2S的沼氣通過脫硫劑床層,沼氣中H2S與活性物質(zhì)(如氧化鐵)接觸,生成 硫化鐵和亞硫化鐵,然后含有硫化物的脫硫劑與空氣中的氧接觸,當有水存在時,鐵的硫化 物又轉(zhuǎn)化為氧化鐵和單體硫。這種脫硫和再生過程可循環(huán)進行多次,直至氧化鐵脫硫劑表面 大部分被硫或其他雜質(zhì)覆蓋而失去活性為止。脫硫方法:脫硫的方法有濕法脫硫和干法脫硫兩種。干法脫硫具有工藝簡單,成熟可靠、造價低等優(yōu)點 ,并能達到較好的交貨程度。目前家用沼氣脫硫基本上采用這種方法。干法脫硫劑有活性炭、氧化鋅、氧化錳及氧化鐵等,從運轉(zhuǎn)時間、使用溫度、公害、價格等 綜合考慮,目前采用多的脫硫劑是氧化鐵。

Dry desulfurization: The harmful substance in biogas is mainly hydrogen sulfide, which is harmful to human health and has a strong corrosive effect on pipeline valves and application equipment. At present, most domestic users have not installed desulfurizers, which has caused serious consequences. To reduce the corrosion damage of hydrogen sulfide on stoves and supporting appliances, extend the service life of equipment, and ensure personal health, it is necessary to install a desulfurizer. Desulfurization principle: At room temperature, biogas containing H2S passes through the desulfurizer bed. H2S in the biogas comes into contact with active substances (such as iron oxide) to generate iron sulfide and ferrous sulfides. Then, the desulfurizer containing sulfides comes into contact with oxygen in the air. When water is present, the sulfides of iron are converted back into iron oxide and monomer sulfur. This desulfurization and regeneration process can be repeated until the surface of the iron oxide desulfurizer is mostly covered by sulfur or other impurities and loses its activity. Desulfurization methods: There are two types of desulfurization methods: wet desulfurization and dry desulfurization. Dry desulfurization has the advantages of simple process, mature and reliable, low cost, and can achieve good delivery level. At present, this method is mainly used for household biogas desulfurization. Dry desulfurization agents include activated carbon, zinc oxide, manganese oxide, and iron oxide. Considering factors such as operating time, operating temperature, environmental hazards, and price, iron oxide is currently the most commonly used desulfurizer.

濕法脫硫:濕法脫硫技能是使氣體中的硫化氫在富含催化劑的液相中氧化成單質(zhì)硫的一種脫硫技能。該技能的流程比照簡略,能夠直接得到元素硫。

Wet desulfurization: Wet desulfurization technology is a desulfurization technique that oxidizes hydrogen sulfide in gas into elemental sulfur in a liquid phase rich in catalysts. The process of this skill is relatively simple, and it can directly obtain elemental sulfur.

以上的文章由山東恒能環(huán)保能源設(shè)備有限公司生物脫硫提供分享,更多內(nèi)容請關(guān)注我們:http://www.ydjdys.com

The above article is shared by Shandong Hengneng Environmental Protection Energy Equipment Co., Ltd. for biological desulfurization. For more content, please follow us: http://www.ydjdys.com

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