污泥水蒸气气化焦油化学组分的分布特征

通过GC-MS分析，研究了气化温度和气料比S/B（水蒸气与污泥的质量比）对污泥气化焦油中芳香烃、含氮化合物、含氧化合物和含硫化合物分布特征的影响变化规律.结果表明：污泥气化焦油中芳香烃的化学组分主要为菲类、萘类、芴类和联苯类化合物，其中S/B值1.1、1.5和1.9时菲类和萘类化合物的产率在850℃均达到最大值，S/B值1.5和1.9时芴类产率随气化温度的升高而呈先升高后降低，而800℃时联苯类产率则随S/B值的增加而呈先升高后降低，其最高产率为1.284g/kg.含氮化合物以吲哚类化合物为主，其产率在S/B值为1.5和1.9时均随气化温度的升高而呈降低趋势；含氧化合物中主要为酚类化合物，其产率在750℃时随S/B值的升高而升高，其最高产率3.103g/kg；含硫化合物主要为4，4'-双（四氢噻喃），且仅在850℃、S/B值为1.9气化条件下检出产率为0.263g/kg的萘并1，2-b]噻吩.

Distribution characteristics of chemical components of the tar from sewage sludge steam gasification

The influence of the gasification temperature and S/B (mass ratio of steam to sludge) on the distribution characteristics of aromatic hydrocarbon compounds, nitrogen-containing compounds, oxygen-containing compounds and sulfur-containing compounds in sludge gasification tar was studied by GC-MS analysis. The results showed that the aromatic hydrocarbon compounds in the tar mainly were the phenanthrenes, naphthalenes, fluorenes and biphenyls compounds, and the highest yields of the phenanthrenes and naphthalenes always appeared at the gasification temperature of 850℃ when S/B values were 1.1, 1.5 and 1.9 respectively. The fluorenes yield firstly increased and then decreased with the gasification temperature increase when S/B values were 1.5 and 1.9 respectively, but the biphenyls yield firstly increased and then decreased with S/B value increase at 800℃, which its highest yield was 1.284 g/kg. Indoles compounds was the main chemical components in nitrogen-containing compounds, which its yield decrease with the gasification temperature increase when S/B values were 1.5 and 1.9 respectively. The main components in oxygen-containing compounds was phenols compounds, and its yield increased with S/B value increase when the gasification temperature was 750℃, which its highes tyield was 3.103g/kg. Besides, the main components of sulfur-containing compounds was 4,4'-bis (tetrahydrothiopyran), and naphtha1, 2-b] thiophene with the yield of 0.263 g/kg only exist in the tar from the gasification at the temperature and S/B value of 850℃ and 1.9.