陈崇明, 宫云茜, 周慧波,等.脉冲放电等离子体修复绝缘油污染土壤[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2021120070.

CHEN C M, GONG Y Q, ZHOU H B, et al.Remediation of insulating oil contaminated soil by pulsed discharge plasma[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2021120070.

脉冲放电等离子体修复绝缘油污染土壤（网络首发）

陈崇明, 宫云茜, 周慧波, 车凯

国网河北省电力有限公司电力科学研究院，河北 石家庄 050021

摘要:针对绝缘油降解的等离子体工艺参数影响规律和机理鲜有报道问题，利用针板式脉冲放 电等离子试验平台，考察峰值电压、含水率、绝缘油初始质量分数等参数对土壤中绝缘油降解 效果的影响。结果表明：影响绝缘油降解率的主要因素依次为峰值电压，含水率，绝缘油初始 质量分数，空气流速，频率，处理时间；为实现绝缘油降解，峰值电压应高于10 kV，且高电压可 促进降解和缩短处理时间，降解率和能量效率最高分别为88.18%，43.71 mg/kJ；适当提升含水 率可增加• OH数量，促进降解，但在更高含水率时因降低土壤透气能力和增强团聚，限制活性 离子传输而抑制降解；绝缘油初始质量分数增加可降低降解率，并在质量分数较高时，因土壤 内层绝缘油组分无法与高活性物质接触，导致降解量下降；处理前后土壤中绝缘油均以饱和烃 为主，低碳烷烃易被降解，随着碳数增加降解率逐渐下降；4环芳香烃降解效果优于2~3环的， 但因小分子烃类与苯环高温缩合形成高分子芳香烃，处理后4环以上芳烃含量增加。

关键词:脉冲放电;等离子体;土壤修复;绝缘油;降解

中图分类号：O461;O539;X53

doi:10.16186/j.cnki.1673-9787.2021120070

基金项目:国家电网公司科技项目（5204DY19000A）

收稿日期:2021-12-21

修回日期:2022-03-01

网络首发日期:2023-08-03

Remediation of insulating oil contaminated soil by pulsed discharge plasma（Online）

CHEN Chongming, GONG Yunqian, ZHOU Huibo, CHE Kai

State Grid Hebei Electric Power Research Institute，Shijiazhuang 050021，Hebei，China

Abstract:A needle-plate pulsed discharge plasma experimental system was set up to investigate the effects of main parameters such as peak voltage， moisture content and concentration of insulation oil on the degradation of insulation oil in soil.The results showed that the order of parameters affecting the degradation rate of insulation oil was peak voltage>water content>concentration of insulation oil>air flow rate>frequency> treatment time. The peak voltage should be higher than 10kV in order to degrade insulation oil，and high peak voltage could increase degradation rate and shorten processing time. The degradation rate and energy efficiency could reach 88.13% and 43.71 mg/kJ，respectively. The degradation rate decreased with the increase of insulation oil concentration.The degradation amount dropped off with higher concentration，because oil ingredient from inner layer soil could not contact with highly active substance. The increase of moisture content could promote oil degradation due to the increase of * OH amount.However， high moisture content inhibited soil degradation because the transportation of active ions was limited by the reduction of soil perme⁃ability and increase of soil aggregation.The insulation oil in soil is mainly saturated hydrocarbon before andafter treatment.The degradation effect of 4 cyclic aromatic hydrocarbons was better than that of 2-3 cyclicaromatic hydrocarbons. The content of aromatic hydrocarbons above 4 cyclic increased after treatment because of the condensation of small hydrocarbons with benzene rings under high temperature and the formation of polymer aromatic hydrocarbons.

Key words:pulsed discharge;plasma;soil remediation;insulation oil;degradation

CLC：O461;O539;X53