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用石灰水進(jìn)行沼氣脫硫的過程和注意事項(xiàng)!

用石灰水進(jìn)行沼氣脫硫是一種成本比較低的一種脫硫技術(shù),在用石灰水作脫硫劑過程中,只消耗成本低廉的CaO,廢棄物為CaSO4和CaSO3及煙塵的混合物,水在系統(tǒng)中可以永久循環(huán)使用。

Biogas desulfurization with limewater is a relatively low-cost desulfurization technology. In the process of using limewater as desulfurizer, only low-cost CaO is consumed. The waste is a mixture of CaSO4, CaSO3 and smoke and dust. Water can be permanently recycled in the system.
脫硫過程比較復(fù)雜,下面小編就給大家詳細(xì)的介紹一下:
The process of desulfurization is rather complicated. The following section will give you a detailed introduction:
1、煙氣中的SO2與水H2O生成亞硫酸H2SO3。
1. H2SO3 sulfite is formed from SO2 in flue gas and H2O in water.
2、煙氣中的SO2與噴淋水中的Ca(OH)2反應(yīng)生成CaSO3沉淀。
2. CO2 in flue gas reacts with Ca(OH)2 in spray water to form CaSO3 precipitation.
3、煙氣中的CO2與噴淋水中的Ca(OH)2反應(yīng)生成CaCO3沉淀。
3. CO2 in flue gas reacts with Ca(OH)2 in spray water to form CaCO3 precipitation.
4、在循環(huán)水噴淋過程中CaCO3被H2SO3置換成CaSO3。
4. CaCO3 is replaced by H2SO3 in the spraying process of circulating water.
5、在循環(huán)水噴淋過程中CaSO3被煙氣中的氧O2成CaSO4沉淀。
沼氣脫硫設(shè)備
5. CaSO3 is precipitated into CaSO4 by oxygen in flue gas during the spraying process of circulating water.
為降低CaO(石灰)的消耗量,在噴淋水循環(huán)中,應(yīng)保持噴淋水的PH值在5-6之間,由于噴淋水中的H2SO3濃度不斷增加PH值降至5.5以下時(shí),應(yīng)攪拌水石灰,使噴淋水的PH值達(dá)到8以上。
In order to reduce the consumption of CaO (lime), the PH value of spraying water should be kept between 5 and 6 in the spraying water cycle. When the PH value of spraying water drops below 5.5 due to the increasing concentration of H2SO3, water lime should be stirred to make the PH value of spraying water reach above 8.
注意事項(xiàng):
Matters needing attention:
1、每班(8小時(shí))攪拌石灰漿2-3次。
1. Mix lime slurry 2-3 times per shift (8 hours).
2、每班清理除塵器底部沉淀物1-2次。
2. Clean the bottom sediment of the dust collector 1-2 times per shift.
這種脫硫技術(shù)的缺點(diǎn)是: 管道及噴咀易堵塞。
The disadvantage of this desulfurization technology is that the pipeline and nozzle are easily blocked.
好了,今天的精彩內(nèi)容就先給大家介紹到這里了!沼氣脫硫的小編會(huì)定期為大家整理發(fā)布一些行業(yè)信息,歡迎大家收藏我們的網(wǎng)站:http://m.851323.com
Well, today's wonderful content will be introduced to you here first! The editorial board of biogas desulfurization regularly organizes and publishes some industry information for you. Welcome to collect our website: http://m.851323.com.

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