脉冲放电等离子体修复绝缘油污染土壤
X53; 目的 为了探讨绝缘油降解的等离子体工艺参数影响规律和机理,方法 利用针板式脉冲放电等离子试验平台,选取峰值电压、含水率、频率等6个参数分析绝缘油处理效果.结果 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,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,但含水率更高时因土壤透气能力降低和团聚增强,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,但质量分数较高时,因土壤内层绝缘...
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| Published in | 河南理工大学学报（自然科学版） Vol. 43; no. 2; pp. 88 - 102 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
国网河北省电力有限公司 电力科学研究院,河北 石家庄 050021
01.03.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1673-9787 |
| DOI | 10.16186/j.cnki.1673-9787.2021120070 |
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| Abstract | X53; 目的 为了探讨绝缘油降解的等离子体工艺参数影响规律和机理,方法 利用针板式脉冲放电等离子试验平台,选取峰值电压、含水率、频率等6个参数分析绝缘油处理效果.结果 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,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,但含水率更高时因土壤透气能力降低和团聚增强,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,但质量分数较高时,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.结论 研究结果可为等离子体修复绝缘油污染土壤技术研究提供参考. |
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| AbstractList | X53; 目的 为了探讨绝缘油降解的等离子体工艺参数影响规律和机理,方法 利用针板式脉冲放电等离子试验平台,选取峰值电压、含水率、频率等6个参数分析绝缘油处理效果.结果 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,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,但含水率更高时因土壤透气能力降低和团聚增强,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,但质量分数较高时,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.结论 研究结果可为等离子体修复绝缘油污染土壤技术研究提供参考. |
| Abstract_FL | Objectives In order to investigate the influence and mechanism of plasma process parameters on the degradation of insulating oil,Methods six factors such as peak voltage,moisture content,frequency,etc were selected to analyzed the oil treatment efficiency on needle-plate pulsed discharge plasma experimental system.Results 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 10 kV in order to degrade insulation oil,and high peak voltage could increase degradation rate and shorten processing time.The highest degradation rate and energy effi-ciency could reach 88.13%and 43.71 mg/kJ,respectively.The degradation rate decreased with the increase of insulation oil concentration.The increase of moisture content could promote oil degradation due to the in-crease of·OH amount.However,high moisture content inhibited soil degradation because the transportation of active ions was limited by the reduction of soil permeability and increase of soil aggregation.An increase in the initial mass fraction of insulating oil can reduce the degradation rate,but when the mass fraction is high,the degradation amount decreases due to the inability of the insulating oil components in the soil inner layer to come into contact with highly active substances.The insulation oil in soil is mainly saturated hydro-carbon before and after treatment,and low-carbon alkanes are easily degraded.The degradation rate gradu-ally decreases with the increase of carbon number.The degradation effect of 4 cyclic aromatic hydrocarbons was better than that of 2-3 cyclic aromatic hydrocarbons.The content of aromatic hydrocarbons above 4 cy-clic increased after treatment because of the condensation of small hydrocarbons with benzene rings under high temperature and the formation of polymer aromatic hydrocarbons.Conclusions The research results can provide reference for the study of plasma remediation of insulating oil contaminated soil. |
| Author | 陈崇明 车凯 周慧波 宫云茜 |
| AuthorAffiliation | 国网河北省电力有限公司 电力科学研究院,河北 石家庄 050021 |
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| Author_FL | CHEN Chongming CHE Kai ZHOU Huibo GONG Yunqian |
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| Author_xml | – sequence: 1 fullname: 陈崇明 – sequence: 2 fullname: 宫云茜 – sequence: 3 fullname: 周慧波 – sequence: 4 fullname: 车凯 |
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| Keywords | 绝缘油 insulation oil 降解 soil remediation 土壤修复 脉冲放电 pulsed discharge 等离子体 degradation plasma |
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| Snippet | X53; 目的 为了探讨绝缘油降解的等离子体工艺参数影响规律和机理,方法 利用针板式脉冲放电等离子试验平台,选取峰值电压、含水率、频率等6个参数分析绝缘油处理效果.结果 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... |
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| Title | 脉冲放电等离子体修复绝缘油污染土壤 |
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