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原理:酸式生物脱硫工艺为生物滴滤池工艺。沼气进入脱硫塔后, 在塔内微生物、氧气和循环水的作用下完成H2S的吸收和降 解,净化后的气体从塔顶排出。微生物塔内附着生长,非游 离态。
Principle: The acid type biological desulfurization process is a biological trickling filter process. After entering the desulfurization tower, biogas is absorbed and degraded by microorganisms, oxygen, and circulating water inside the tower, and the purified gas is discharged from the top of the tower. Microbial growth within the tower, non free.
→ 2S + 2H2O (1)
→ 2S+2H2O (1)
→ 2H2SO4 (2)
→ 2H2SO4 (2)
酸式生物脱硫特点
Characteristics of acid based biological desulfurization
一、适用范围:
1、 Applicable scope:
①沼气中H2S含量为500ppm-6000ppm,若H2S含量为500ppm-3000ppm效果更 佳;H2S含量为3500ppm-6000ppm碱式的成本更低;②产气原料为油性或者非油性均可;③用途为集中供气和普通用气;
① The H2S content in biogas is 500ppm-6000ppm, and the effect is better if the H2S content is 500ppm-3000ppm; The cost of basic formula with H2S content of 3500ppm-6000ppm is lower; ② The gas production raw materials can be either oily or non oily; ③ Intended for centralized gas supply and general use;
二、生物脱硫系统能够确保脱硫后的沼气中硫化氢含量≤ 20ppm,去除率达到 99%以上,很少有单质S产生;塔内惰性填料孔隙率高、阻力小,当进气H2S含量<4000ppm,1-2年需要清 洗填料;进气H2S含量>4000ppm,则半年清洗填料;三、营养液的pH值维持在1.5左右,通过控制溶解氧(DO)即可维持。运行温 度为30℃
2、 The biological desulfurization system can ensure that the hydrogen sulfide content in the desulfurized biogas is ≤ 20ppm, with a removal rate of over 99%, and there is little production of elemental S; The inert filler inside the tower has high porosity and low resistance. When the H2S content in the intake air is less than 4000ppm, the filler needs to be cleaned within 1-2 years; If the H2S content in the intake air is greater than 4000ppm, clean the filler half a year; 3、 The pH value of the nutrient solution is maintained at around 1.5, which can be maintained by controlling dissolved oxygen (DO). Operating temperature is 30 ℃