SO2 absorbent and method for absorbing SO2

The invention relates to an SO2 absorbent and a method for absorbing SO2, and belongs to the technical field of gas purification. The SO2 absorbent disclosed by the invention is prepared from the following raw materials in percentage by weight: 10-30% of diisopropanolamine, 10-25% of a compound component and the balance of water, wherein the compound component is one or a plurality of materials selected from 2-amino-2-methyl-1-propanol, diethyl ethanolamine and methylethanolamine. The SO2 absorbent is low in cost and high in SO2 absorption rate, SO2 in absorbed tail gas is less than 30 mg/m , and the tail gas can be directly exhausted to the atmosphere. The invention also provides a method for absorbing SO2, wherein the method has the advantages of simple process, low energy consumption,economy, environmental protection and no secondary pollution. 本发明涉及一种SO吸收剂及吸收SO的方法，属于气体净化技术领域。本发明所述的SO吸收剂，包括以下重量百分含量的原料：二异丙醇胺10％-30％，复配组分10％-25％，余量为水；所述复配组分为2-氨基-2-甲基-1-丙醇、二乙基乙醇胺或甲基乙醇胺中的一种或多种。本发明所述的SO吸收剂，成本低，SO吸收率高，吸收后尾气中SO在30