Process of two-stage absorption column to strengthen water scrubbing technology to purify biogas

DING Jian; REN Jiajia; LI Zheng; YANG Zhuhong; LU Xiaohua

doi:10.11949/j.issn.0438-1157.20160608

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Process of two-stage absorption column to strengthen water scrubbing technology to purify biogas

更新时间：2025-11-26

- Process of two-stage absorption column to strengthen water scrubbing technology to purify biogas
- CIESC Journal Vol. 67, Issue 10, Pages: 4203-4210(2016)
- 作者机构：
  
  南京工业大学材料化学国家重点实验室,江苏,南京,210009
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160608
  CLC： K6S216.4
- Online First：05 October 2016，
  
  Published：05 October 2016
- 稿件说明：
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DING Jian, REN Jiajia, LI Zheng, et al. Process of two-stage absorption column to strengthen water scrubbing technology to purify biogas[J]. CIESC Journal, 2016, 67(10): 4203-4210.
DOI：

DING Jian, REN Jiajia, LI Zheng, et al. Process of two-stage absorption column to strengthen water scrubbing technology to purify biogas[J]. CIESC Journal, 2016, 67(10): 4203-4210. DOI： 10.11949/j.issn.0438-1157.20160608.

摘要

压力水洗技术已成为提纯沼气的关键技术之一。采用填料吸收塔进行CO2脱除实验研究，考察了液气比、吸收压力、吸收温度、CO2初始含量、填料层高度对CO2脱除率的影响，以及液气比、沼气流量对总体积吸收系数的影响，并运用填料塔与喷雾塔结合的二段式吸收塔进行压力水洗提纯沼气的过程强化实验。实验结果表明，吸收压力和液气比的增大、吸收温度的降低、填料层高度的增加有利于CO2的脱除，体积总吸收系数随着液气比及沼气流量的增加而增大。二段式吸收塔能够提高CO2吸收效果，当沼气处理量为10 L·min-1，填料层高度为100 cm，CO2含量小于3%时，与填料塔相比二段式吸收塔可以减少约12%的吸收液用量，并且采用110 cm填料的二段式吸收塔获得最佳的提纯效果，CO2脱除率达到97.4%。

Abstract

Pressure water scrubbing technology has become one of the key technologies of biogas purification. This paper adopted a packed absorption column to study on carbon dioxide removal. The influences of absorption pressure

absorption temperature

carbon dioxide content on the product gas and height of packing layer on carbon dioxide removal rate as well as those of liquid/gas ratio and biogas flow on volumetric overall absorption coefficient were investigated. At the same time

the intensive tests used a two-stage absorption column combined with a packed column and a spray column for purification process of pressure water. It was shown from the results that the increased absorption pressure

liquid-gas ratio and height of packing layer and reduced absorption temperature were favorable of removing carbon dioxide. Besides

volumetric overall absorption coefficient rose with increasing liquid/gas ratio and biogas flow. Two-stage absorption column was able to improve the effect of carbon dioxide absorption. When the biogas flow was 10 L·min-1

the height of packing layer 100 cm and carbon dioxide content less than 3%

about 12% of the amount of absorption liquid can be reduced by two-stage absorption column compared with the traditional packed tower. Furthermore

when the two-stage absorption column of 110 cm was used

the optimum purification effect can be obtained and the carbon dioxide removal rate can reach 97.4%.

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