Experimental Investigation of Cutting Nitrogen Oxides Emission from Cement Kilns using Coal Preheating Method
The large consumption of coal in cement industry leads to a significant nitrogen oxide (NO x ) emission, which has caused severe atmospheric pollution due to the existing low-efficiency denitration technologies. In this research, a fuel pretreatment method on the concept of coal preheating was propo...
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| Veröffentlicht in: | Journal of thermal science 2021-07, Vol.30 (4), p.1097-1107 |
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| creator | Wu, Huixing Cai, Jun Ren, Qiangqiang Cao, Xiaoyang Lyu, Qinggang |
| description | The large consumption of coal in cement industry leads to a significant nitrogen oxide (NO
x
) emission, which has caused severe atmospheric pollution due to the existing low-efficiency denitration technologies. In this research, a fuel pretreatment method on the concept of coal preheating was proposed to reduce NO
x
emission from cement kilns. A special bench-scale experiment was designed to verify the feasibility of the proposed method. Experimental results showed that the proposed method could achieve high combustion efficiency, steady operation and low NO
x
emission. The maximum reduction efficiency of primary NO in kiln gas reached 91.4% while the lowest NO
x
emission was 145 mg/m
3
(@10% O
2
) during the experiment. The effects of key parameters on NO
x
emission and primary NO
x
reduction efficiency were comprehensively investigated. It was found that primary and secondary air ratios determined the oxygen content in the flue gas and the reaction temperature, which multiply affected the fuel-NO
x
formation and activity of reductants. Increasing the length of the reducing zone could not only enhance the primary NO
x
reduction efficiency, but also lower the combustion efficiency. In addition, cement raw material could greatly accelerate the formation of fuel-NO
x
while its catalytic action on NO
x
reduction was limited. |
| doi_str_mv | 10.1007/s11630-021-1492-6 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2549233791</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2549233791</sourcerecordid><originalsourceid>FETCH-LOGICAL-c316t-316beaab613f1108ad1616e6cae32a7c7752f513799a5d23e55726478a90b7a13</originalsourceid><addsrcrecordid>eNp1kEFPwyAYhonRxDn9Ad5IPKN8sMJ6NM3Uxek8aOKNsJZ2XVaYwMz891Jr4skLH4f3eb98D0KXQK-BUnkTAASnhDIgMMkZEUdoBHnOCeX8_Tj9KeWEgchP0VkIG0qFFHwyQt3ssDO-7YyNeovn9tOE2DY6ts5iV-NiH2NrG_zcRu8aY_Hy0FYm4FnXhtBnau86XJiex4_t1ga8Dz1QuFT34s3a6J-CJxPXrjpHJ7XeBnPxO8fo7W72WjyQxfJ-XtwuSMlBRJKeldF6JYDXAHSqKxAgjCi14UzLUsqM1Rlwmec6qxg3WSaZmMipzulKauBjdDX07rz72KeT1MbtvU0rFcuSHp7QPgVDqvQuBG9qtUsmtP9SQFVvVQ1WVbKqeqtKJIYNTEhZ2xj_1_w_9A2t03qf</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2549233791</pqid></control><display><type>article</type><title>Experimental Investigation of Cutting Nitrogen Oxides Emission from Cement Kilns using Coal Preheating Method</title><source>Alma/SFX Local Collection</source><source>SpringerLink Journals - AutoHoldings</source><creator>Wu, Huixing ; Cai, Jun ; Ren, Qiangqiang ; Cao, Xiaoyang ; Lyu, Qinggang</creator><creatorcontrib>Wu, Huixing ; Cai, Jun ; Ren, Qiangqiang ; Cao, Xiaoyang ; Lyu, Qinggang</creatorcontrib><description>The large consumption of coal in cement industry leads to a significant nitrogen oxide (NO
x
) emission, which has caused severe atmospheric pollution due to the existing low-efficiency denitration technologies. In this research, a fuel pretreatment method on the concept of coal preheating was proposed to reduce NO
x
emission from cement kilns. A special bench-scale experiment was designed to verify the feasibility of the proposed method. Experimental results showed that the proposed method could achieve high combustion efficiency, steady operation and low NO
x
emission. The maximum reduction efficiency of primary NO in kiln gas reached 91.4% while the lowest NO
x
emission was 145 mg/m
3
(@10% O
2
) during the experiment. The effects of key parameters on NO
x
emission and primary NO
x
reduction efficiency were comprehensively investigated. It was found that primary and secondary air ratios determined the oxygen content in the flue gas and the reaction temperature, which multiply affected the fuel-NO
x
formation and activity of reductants. Increasing the length of the reducing zone could not only enhance the primary NO
x
reduction efficiency, but also lower the combustion efficiency. In addition, cement raw material could greatly accelerate the formation of fuel-NO
x
while its catalytic action on NO
x
reduction was limited.</description><identifier>ISSN: 1003-2169</identifier><identifier>EISSN: 1993-033X</identifier><identifier>DOI: 10.1007/s11630-021-1492-6</identifier><language>eng</language><publisher>Heidelberg: Science Press</publisher><subject>Cement ; Classical and Continuum Physics ; Coal ; Combustion efficiency ; Denitration ; Efficiency ; Emission analysis ; Emission standards ; Emissions control ; Engineering Fluid Dynamics ; Engineering Thermodynamics ; Flue gas ; Fuels ; Heat and Mass Transfer ; Heating ; Kilns ; Nitrogen oxides ; Oxygen content ; Physics ; Physics and Astronomy ; Reducing agents</subject><ispartof>Journal of thermal science, 2021-07, Vol.30 (4), p.1097-1107</ispartof><rights>Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2021</rights><rights>Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2021.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c316t-316beaab613f1108ad1616e6cae32a7c7752f513799a5d23e55726478a90b7a13</citedby><cites>FETCH-LOGICAL-c316t-316beaab613f1108ad1616e6cae32a7c7752f513799a5d23e55726478a90b7a13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11630-021-1492-6$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11630-021-1492-6$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Wu, Huixing</creatorcontrib><creatorcontrib>Cai, Jun</creatorcontrib><creatorcontrib>Ren, Qiangqiang</creatorcontrib><creatorcontrib>Cao, Xiaoyang</creatorcontrib><creatorcontrib>Lyu, Qinggang</creatorcontrib><title>Experimental Investigation of Cutting Nitrogen Oxides Emission from Cement Kilns using Coal Preheating Method</title><title>Journal of thermal science</title><addtitle>J. Therm. Sci</addtitle><description>The large consumption of coal in cement industry leads to a significant nitrogen oxide (NO
x
) emission, which has caused severe atmospheric pollution due to the existing low-efficiency denitration technologies. In this research, a fuel pretreatment method on the concept of coal preheating was proposed to reduce NO
x
emission from cement kilns. A special bench-scale experiment was designed to verify the feasibility of the proposed method. Experimental results showed that the proposed method could achieve high combustion efficiency, steady operation and low NO
x
emission. The maximum reduction efficiency of primary NO in kiln gas reached 91.4% while the lowest NO
x
emission was 145 mg/m
3
(@10% O
2
) during the experiment. The effects of key parameters on NO
x
emission and primary NO
x
reduction efficiency were comprehensively investigated. It was found that primary and secondary air ratios determined the oxygen content in the flue gas and the reaction temperature, which multiply affected the fuel-NO
x
formation and activity of reductants. Increasing the length of the reducing zone could not only enhance the primary NO
x
reduction efficiency, but also lower the combustion efficiency. In addition, cement raw material could greatly accelerate the formation of fuel-NO
x
while its catalytic action on NO
x
reduction was limited.</description><subject>Cement</subject><subject>Classical and Continuum Physics</subject><subject>Coal</subject><subject>Combustion efficiency</subject><subject>Denitration</subject><subject>Efficiency</subject><subject>Emission analysis</subject><subject>Emission standards</subject><subject>Emissions control</subject><subject>Engineering Fluid Dynamics</subject><subject>Engineering Thermodynamics</subject><subject>Flue gas</subject><subject>Fuels</subject><subject>Heat and Mass Transfer</subject><subject>Heating</subject><subject>Kilns</subject><subject>Nitrogen oxides</subject><subject>Oxygen content</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Reducing agents</subject><issn>1003-2169</issn><issn>1993-033X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp1kEFPwyAYhonRxDn9Ad5IPKN8sMJ6NM3Uxek8aOKNsJZ2XVaYwMz891Jr4skLH4f3eb98D0KXQK-BUnkTAASnhDIgMMkZEUdoBHnOCeX8_Tj9KeWEgchP0VkIG0qFFHwyQt3ssDO-7YyNeovn9tOE2DY6ts5iV-NiH2NrG_zcRu8aY_Hy0FYm4FnXhtBnau86XJiex4_t1ga8Dz1QuFT34s3a6J-CJxPXrjpHJ7XeBnPxO8fo7W72WjyQxfJ-XtwuSMlBRJKeldF6JYDXAHSqKxAgjCi14UzLUsqM1Rlwmec6qxg3WSaZmMipzulKauBjdDX07rz72KeT1MbtvU0rFcuSHp7QPgVDqvQuBG9qtUsmtP9SQFVvVQ1WVbKqeqtKJIYNTEhZ2xj_1_w_9A2t03qf</recordid><startdate>20210701</startdate><enddate>20210701</enddate><creator>Wu, Huixing</creator><creator>Cai, Jun</creator><creator>Ren, Qiangqiang</creator><creator>Cao, Xiaoyang</creator><creator>Lyu, Qinggang</creator><general>Science Press</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20210701</creationdate><title>Experimental Investigation of Cutting Nitrogen Oxides Emission from Cement Kilns using Coal Preheating Method</title><author>Wu, Huixing ; Cai, Jun ; Ren, Qiangqiang ; Cao, Xiaoyang ; Lyu, Qinggang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c316t-316beaab613f1108ad1616e6cae32a7c7752f513799a5d23e55726478a90b7a13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Cement</topic><topic>Classical and Continuum Physics</topic><topic>Coal</topic><topic>Combustion efficiency</topic><topic>Denitration</topic><topic>Efficiency</topic><topic>Emission analysis</topic><topic>Emission standards</topic><topic>Emissions control</topic><topic>Engineering Fluid Dynamics</topic><topic>Engineering Thermodynamics</topic><topic>Flue gas</topic><topic>Fuels</topic><topic>Heat and Mass Transfer</topic><topic>Heating</topic><topic>Kilns</topic><topic>Nitrogen oxides</topic><topic>Oxygen content</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Reducing agents</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wu, Huixing</creatorcontrib><creatorcontrib>Cai, Jun</creatorcontrib><creatorcontrib>Ren, Qiangqiang</creatorcontrib><creatorcontrib>Cao, Xiaoyang</creatorcontrib><creatorcontrib>Lyu, Qinggang</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of thermal science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wu, Huixing</au><au>Cai, Jun</au><au>Ren, Qiangqiang</au><au>Cao, Xiaoyang</au><au>Lyu, Qinggang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Experimental Investigation of Cutting Nitrogen Oxides Emission from Cement Kilns using Coal Preheating Method</atitle><jtitle>Journal of thermal science</jtitle><stitle>J. Therm. Sci</stitle><date>2021-07-01</date><risdate>2021</risdate><volume>30</volume><issue>4</issue><spage>1097</spage><epage>1107</epage><pages>1097-1107</pages><issn>1003-2169</issn><eissn>1993-033X</eissn><abstract>The large consumption of coal in cement industry leads to a significant nitrogen oxide (NO
x
) emission, which has caused severe atmospheric pollution due to the existing low-efficiency denitration technologies. In this research, a fuel pretreatment method on the concept of coal preheating was proposed to reduce NO
x
emission from cement kilns. A special bench-scale experiment was designed to verify the feasibility of the proposed method. Experimental results showed that the proposed method could achieve high combustion efficiency, steady operation and low NO
x
emission. The maximum reduction efficiency of primary NO in kiln gas reached 91.4% while the lowest NO
x
emission was 145 mg/m
3
(@10% O
2
) during the experiment. The effects of key parameters on NO
x
emission and primary NO
x
reduction efficiency were comprehensively investigated. It was found that primary and secondary air ratios determined the oxygen content in the flue gas and the reaction temperature, which multiply affected the fuel-NO
x
formation and activity of reductants. Increasing the length of the reducing zone could not only enhance the primary NO
x
reduction efficiency, but also lower the combustion efficiency. In addition, cement raw material could greatly accelerate the formation of fuel-NO
x
while its catalytic action on NO
x
reduction was limited.</abstract><cop>Heidelberg</cop><pub>Science Press</pub><doi>10.1007/s11630-021-1492-6</doi><tpages>11</tpages></addata></record> |
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| ispartof | Journal of thermal science, 2021-07, Vol.30 (4), p.1097-1107 |
| issn | 1003-2169 1993-033X |
| language | eng |
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| source | Alma/SFX Local Collection; SpringerLink Journals - AutoHoldings |
| subjects | Cement Classical and Continuum Physics Coal Combustion efficiency Denitration Efficiency Emission analysis Emission standards Emissions control Engineering Fluid Dynamics Engineering Thermodynamics Flue gas Fuels Heat and Mass Transfer Heating Kilns Nitrogen oxides Oxygen content Physics Physics and Astronomy Reducing agents |
| title | Experimental Investigation of Cutting Nitrogen Oxides Emission from Cement Kilns using Coal Preheating Method |
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