Article(id=1198266576135877103, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198266568997175650, articleNumber=1009-5438(2023)02-0069-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1673366400000, receivedDateStr=2023-01-11, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763618614467, onlineDateStr=2025-11-20, pubDate=1682352000000, pubDateStr=2023-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763618614467, onlineIssueDateStr=2025-11-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763618614467, creator=13701087609, updateTime=1763618614467, updator=13701087609, issue=Issue{id=1198266568997175650, tenantId=1146029695717560320, journalId=1185652524569653253, year='2023', volume='49', issue='2', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763618612765, creator=13701087609, updateTime=1763619383107, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1198269800108618470, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198266568997175650, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1198269800108618471, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198266568997175650, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=69, endPage=72, ext={EN=ArticleExt(id=1198266576366563824, articleId=1198266576135877103, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Applications of Double-layer Selective Catalytic Reduction (SCR) Denitration Catalyst in Compressor-turbine Unit with Low Heating Values, columnId=1187100786392711543, journalTitle=Science & Technology of Baotou Steel, columnName=Equipment and Automation, runingTitle=null, highlight=null, articleAbstract=
The maximum concentration of nitrogen oxide emissions in the flue gas of four compressor-turbine units with low heating values using blast furnace and coke oven gas in a steel enterprise is about 250 mg/m3, which could not meet the requirements of limiting values for ultra-low emissions of the steel industry, so the denitration modification is needed. Three different denitration modification schemes are proposed based on studying frequently-used flue gas denitration technologies at home and abroad. The modification scheme of built-in double-layer SCR catalyst in waste heat boiler is finally implemented by comparing such factors as the technology maturity, use risks and operating economy as well as the expected effects are achieved. This study could provide the feasible and effective technical methods for the compressor-turbine unit with low heating values and more nitrogen oxides while without prepared denitration space on site in our country.
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某钢铁企业4台使用高炉煤气、焦炉煤气的低热值燃气轮机组烟气氮氧化物排放最高浓度约为250 mg/m3,不满足钢铁行业超低排放限值要求,需要进行脱硝改造。在研究国内外常用的烟气脱硝技术基础上,提出了3种不同的脱硝改造方案。通过对比技术成熟度、使用风险、运行经济性等因素最终实施了余热锅炉内置双层SCR催化剂的改造方案并达到预期效果。本研究可为我国未预留脱硝空间且氮氧化物较高的低热值燃气轮机组提供现场可行且有效的技术方法。
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孟晓敏(1986-),男,山西省代县人,高级工程师,现从事热能与动力工程方面的运行、设备研究工作。
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孟晓敏(1986-),男,山西省代县人,高级工程师,现从事热能与动力工程方面的运行、设备研究工作。
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孟晓敏(1986-),男,山西省代县人,高级工程师,现从事热能与动力工程方面的运行、设备研究工作。
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烟气量
/(t·h-1) | 排烟温度
/℃ | 烟气最高NOx浓度
/(mg·m-3) | 烟气含氧量
/% |
| 1 346.8 | 130~170 | 250 | ≤15 |
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1#—4#燃气轮机组脱硝改造前烟气参数
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烟气量
/(t·h-1) | 排烟温度
/℃ | 烟气最高NOx浓度
/(mg·m-3) | 烟气含氧量
/% |
| 1 346.8 | 130~170 | 250 | ≤15 |
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| 技术类型 | 适用温度/℃ | 脱硝效率/% | 缺点 |
| SCR | 150~450 | 90~95 | 需使用催化剂 |
| SNCR | 850~1 100 | 30~60 | 脱硝效率低下 |
| 活性焦法 | 120~160 | 70~80 | 投资与运行费用高,存在较大安全风险 |
| 氧化吸收法 | <60 | 50~80 | 运行费较高,有二次污染,效率较低,适用于湿法改造 |
| 络合吸收法 | <60 | 50~70 | 运行费较高,络合剂再生困难,适用于湿法改造 |
| 固定床法 | 120~450 | 40~75 | 不宜处理较高浓度氮氧化物废气 |
), ArticleFig(id=1198266579067695684, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198266576135877103, language=CN, label=表2, caption=
氮氧化物末端控制技术使用条件对比
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| 技术类型 | 适用温度/℃ | 脱硝效率/% | 缺点 |
| SCR | 150~450 | 90~95 | 需使用催化剂 |
| SNCR | 850~1 100 | 30~60 | 脱硝效率低下 |
| 活性焦法 | 120~160 | 70~80 | 投资与运行费用高,存在较大安全风险 |
| 氧化吸收法 | <60 | 50~80 | 运行费较高,有二次污染,效率较低,适用于湿法改造 |
| 络合吸收法 | <60 | 50~70 | 运行费较高,络合剂再生困难,适用于湿法改造 |
| 固定床法 | 120~450 | 40~75 | 不宜处理较高浓度氮氧化物废气 |
), ArticleFig(id=1198266579130610246, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198266576135877103, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 区间1 | 区间2 |
| 冬季100%负荷 | 444 | 244 |
| 夏季100%负荷 | 453 | 239 |
| 冬季50%负荷 | 380 | 219 |
| 夏季50%负荷 | 416 | 213 |
), ArticleFig(id=1198266579206107720, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198266576135877103, language=CN, label=表3, caption=
1#、2#燃气轮机组余热锅炉检修空间烟气温度℃
, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 区间1 | 区间2 |
| 冬季100%负荷 | 444 | 244 |
| 夏季100%负荷 | 453 | 239 |
| 冬季50%负荷 | 380 | 219 |
| 夏季50%负荷 | 416 | 213 |
), ArticleFig(id=1198266579269022282, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198266576135877103, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 区间3 | 区间4 |
| 冬季100%负荷 | 297 | 228 |
| 夏季100%负荷 | 297 | 230 |
| 冬季50%负荷 | 258 | 213 |
| 夏季50%负荷 | 257 | 217 |
), ArticleFig(id=1198266579361296972, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198266576135877103, language=CN, label=表4, caption=
3#、4#燃气轮机组余热锅炉检修空间烟气温度℃
, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 区间3 | 区间4 |
| 冬季100%负荷 | 297 | 228 |
| 夏季100%负荷 | 297 | 230 |
| 冬季50%负荷 | 258 | 213 |
| 夏季50%负荷 | 257 | 217 |
), ArticleFig(id=1198266579461960269, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198266576135877103, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 时间 | 入口氮氧化物浓度小时均值 | | 出口氮氧化物浓度小时均值 |
| 1# | 2# | 3# | 4# | | 1# | 2# | 3# | 4# |
| 19:00 | 181.39 | 183.42 | 205.33 | 208.36 | | 41.81 | 38.42 | 41.15 | 41.83 |
| 20:00 | 213.76 | 221.83 | 230.59 | 231.67 | | 43.74 | 38.86 | 47.85 | 46.48 |
| 21:00 | 243.25 | 245.39 | 218.88 | 217.56 | | 49.92 | 35.95 | 33.73 | 43.41 |
| 22:00 | 154.14 | 149.53 | 187.89 | 183.86 | | 46.98 | 31.99 | 44.56 | 45.14 |
| 23:00 | 183.38 | 179.42 | 205.33 | 213.48 | | 39.26 | 42.62 | 37.21 | 37.53 |
), ArticleFig(id=1198266579550040654, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198266576135877103, language=CN, label=表5, caption=
1#—4#燃气轮机组氮氧化物出入口浓度对比mg/m3
, figureFileSmall=null, figureFileBig=null, tableContent=
| 时间 | 入口氮氧化物浓度小时均值 | | 出口氮氧化物浓度小时均值 |
| 1# | 2# | 3# | 4# | | 1# | 2# | 3# | 4# |
| 19:00 | 181.39 | 183.42 | 205.33 | 208.36 | | 41.81 | 38.42 | 41.15 | 41.83 |
| 20:00 | 213.76 | 221.83 | 230.59 | 231.67 | | 43.74 | 38.86 | 47.85 | 46.48 |
| 21:00 | 243.25 | 245.39 | 218.88 | 217.56 | | 49.92 | 35.95 | 33.73 | 43.41 |
| 22:00 | 154.14 | 149.53 | 187.89 | 183.86 | | 46.98 | 31.99 | 44.56 | 45.14 |
| 23:00 | 183.38 | 179.42 | 205.33 | 213.48 | | 39.26 | 42.62 | 37.21 | 37.53 |
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