Assessment of a staged and inclined hopper-air injection in enhancing low-NO x combustion and establishing a safe hopper environment for a large-scale arch-fired furnace.
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| Title: | Assessment of a staged and inclined hopper-air injection in enhancing low-NO |
|---|---|
| Authors: | Cheng, Shuting1 (AUTHOR), Kuang, Min1 (AUTHOR) kmwust2000@163.com, Zhao, Yiping1 (AUTHOR) |
| Source: | Energy & Environment. Mar2026, Vol. 37 Issue 2, p985-1008. 24p. |
| Subject Terms: | *Combustion, *Combustion efficiency, *Combustion engineering, *Furnaces, *Abatement (Atmospheric chemistry) |
| Abstract: | In response to the high NO x emissions and hopper overheating problem of a 600-MWe arch-fired furnace, a staged arch-firing framework (SAF) with an upper/lower staged hopper-air pattern was proposed to replace the original low-NO x technique. With implementing such a staged hopper-air configuration to enhance air staging and reduce the downward flame penetration, it was required to (i) affirm the SAF's effectiveness related to the mentioned problems and (ii) assess the upper hopper-air (UHA) angle effect for obtaining a reasonable UHA angle. Accordingly, the in-furnace flow, combustion, and NO x generation were respectively investigated under five UHA angles of θ = 0°, 20°, 30°, 35°, and 40°. Meanwhile, real-furnace tests and simulations in the original furnace were conducted to make comparisons with the SAF furnace. As θ increased, the flame penetration progressively deepened. The primary hopper-air function in favoring char combustion and overall combustion performance first strengthened and then weakened, while the production of CO and NO and combustible matter in fly ash first dropped and then ascended. The setup with θ = 35° demonstrated the most favorable low-NO x performance, exhibiting NO x levels of about 600 mg/m3 (O2 = 6%) and combustible matter of about 5% in fly ash. A comparison before and after the SAF application indicates that, despite reducing downward flame penetration, the SAF bolstered primary combustion and increased air utilization to facilitate char combustion in the hopper and the burnout zone. Consequently, a further 33.5% NO x reduction was achieved, along with slight burnout improvement and notably reduced hopper temperatures. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 192206372 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Assessment of a staged and inclined hopper-air injection in enhancing low-NO <subscript>x</subscript> combustion and establishing a safe hopper environment for a large-scale arch-fired furnace. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Cheng%2C+Shuting%22">Cheng, Shuting</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kuang%2C+Min%22">Kuang, Min</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kmwust2000@163.com</i><br /><searchLink fieldCode="AR" term="%22Zhao%2C+Yiping%22">Zhao, Yiping</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energy+%26+Environment%22">Energy & Environment</searchLink>. Mar2026, Vol. 37 Issue 2, p985-1008. 24p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Combustion%22">Combustion</searchLink><br />*<searchLink fieldCode="DE" term="%22Combustion+efficiency%22">Combustion efficiency</searchLink><br />*<searchLink fieldCode="DE" term="%22Combustion+engineering%22">Combustion engineering</searchLink><br />*<searchLink fieldCode="DE" term="%22Furnaces%22">Furnaces</searchLink><br />*<searchLink fieldCode="DE" term="%22Abatement+%28Atmospheric+chemistry%29%22">Abatement (Atmospheric chemistry)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In response to the high NO x emissions and hopper overheating problem of a 600-MWe arch-fired furnace, a staged arch-firing framework (SAF) with an upper/lower staged hopper-air pattern was proposed to replace the original low-NO x technique. With implementing such a staged hopper-air configuration to enhance air staging and reduce the downward flame penetration, it was required to (i) affirm the SAF's effectiveness related to the mentioned problems and (ii) assess the upper hopper-air (UHA) angle effect for obtaining a reasonable UHA angle. Accordingly, the in-furnace flow, combustion, and NO x generation were respectively investigated under five UHA angles of θ = 0°, 20°, 30°, 35°, and 40°. Meanwhile, real-furnace tests and simulations in the original furnace were conducted to make comparisons with the SAF furnace. As θ increased, the flame penetration progressively deepened. The primary hopper-air function in favoring char combustion and overall combustion performance first strengthened and then weakened, while the production of CO and NO and combustible matter in fly ash first dropped and then ascended. The setup with θ = 35° demonstrated the most favorable low-NO x performance, exhibiting NO x levels of about 600 mg/m3 (O2 = 6%) and combustible matter of about 5% in fly ash. A comparison before and after the SAF application indicates that, despite reducing downward flame penetration, the SAF bolstered primary combustion and increased air utilization to facilitate char combustion in the hopper and the burnout zone. Consequently, a further 33.5% NO x reduction was achieved, along with slight burnout improvement and notably reduced hopper temperatures. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=192206372 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1177/0958305X241253768 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 24 StartPage: 985 Subjects: – SubjectFull: Combustion Type: general – SubjectFull: Combustion efficiency Type: general – SubjectFull: Combustion engineering Type: general – SubjectFull: Furnaces Type: general – SubjectFull: Abatement (Atmospheric chemistry) Type: general Titles: – TitleFull: Assessment of a staged and inclined hopper-air injection in enhancing low-NO x combustion and establishing a safe hopper environment for a large-scale arch-fired furnace. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Cheng, Shuting – PersonEntity: Name: NameFull: Kuang, Min – PersonEntity: Name: NameFull: Zhao, Yiping IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 0958305X Numbering: – Type: volume Value: 37 – Type: issue Value: 2 Titles: – TitleFull: Energy & Environment Type: main |
| ResultId | 1 |
