摘要
市政污泥厌氧消化沼气中含有少量的HS,危害巨大,沼气综合利用前必须进行脱硫净化处理。回顾了我国污泥消化沼气脱硫的发展历程,指出脱硫技术要开发应用新工艺与改良传统工艺并重。对于体量较大的污泥消化工程,提出了碱再生生物洗涤+同步再生干法脱硫的沼气处理工艺。沼气产量超过48000 m^(3)/d的工程实践表明,在进气HS含量为4125~7425 mg/m^(3)的条件下,生物脱硫单元出气HS含量均小于27 mg/m^(3),去除率达到99%以上,干法脱硫出气均未检出HS。鉴于生物脱硫对H2S的高效去除,指出为尽可能降低沼气脱硫的运行成本,延长干式脱硫剂的更换周期,在生物脱硫即可达到用气设备要求的前提下,可采用将跨越干法脱硫作为应急备用的运行模式,以降低运行成本、延长脱硫剂的更换周期。
The biogas produced during the municipal sludge digestion process usually contains a small quantity of HS,which has a great harm and must be removed before the utilization of biogas.The development history of biogas desulfurization for sludge digestion in our country is reviewed,suggesting that the development and application of new desulfurization technologies as well as the improvement in traditional process shall be both paid attention to.For a considerable sized sludge digestion project,the combined treatment process of bio-scrubbing with alkalinity regeneration and simultaneous regeneration dry desulfurization was proposed for biogas desulfurization.For the case investigated in this work,with a biogas production of more than 48000 m^(3)/d,the inlet HS concentration was 4125-7425 mg/m^(3).After the bio-desulfurization unit,it showed that the HS content was less than 27 mg/m^(3)and corresponding removal efficiency was more than 99%.As a result,no HS was detected after the dry desulfurization.In consideration of the so high HS removal rate by the bio-desulfurization process,it was therefore recommended that,when the effluent biogas of bio-desulfurization could meet the related requirements of gas equipment,crossover dry desulfurization can be adopted as an emergency operation method.This strategy could further reduce the desulfurization cost and extend the replacing period of dry desulfurization mass.
作者
侯盾
周夏海
HOU Dun;ZHOU Xia-hai(Baohang Environment Co.Ltd.,Beijing 100012,China;Suez Water Treatment Infrastructure,Beijing 100026,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2022年第14期25-32,共8页
China Water & Wastewater
关键词
消化沼气
硫化氢
生物脱硫
干法脱硫
同步再生
digestion biogas
hydrogen sulfide
bio-desulfurization
dry desulfurization
simultaneous regeneration
