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Energies
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Optimization of Efficient Clean Combustion Technology
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Optimization of Efficient Clean Combustion Technology

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I2: Energy and Combustion Science".

Deadline for manuscript submissions: 4 September 2024 | Viewed by 906

Special Issue Editors

Dr. Jianguo Zhu

E-Mail Website
Guest Editor
Institute of Engineering Thermophysics, University of Chinese Academy of Sciences, Beijing, China
Interests: combustion; thermal engineering; environmental engineering
Dr. Mingxin Xu

E-Mail Website
Guest Editor
National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, China
Interests: waste composites recovery; waste wind turbine blade recovery; pollutants control
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Efficient clean combustion technology has been a hot topic focus of both experimental investigations and industrial applications. With a large-scale increase in the application of renewable energy electricity in the world, such as wind power, boiler operation needs to be changed, such as running an ultra-low load and increasing load at a rapid rate, to meet the requirements of grid security. The key problems facing the industry include low efficiency, high NOx emission, slow load variation rate, flame extinction, and so on. Some novel methods and technologies are being investigated and tested to overcome these difficulties, supporting the development and application of efficient clean combustion technology.

The Special Issue aims to publish review papers and research papers involving the topics of novel combustion technology, basic principle or theory for improving combustion efficiency or decreasing pollutant emissions, industrial application analyses, and system optimization, etc.  By browsing this Special Issue, the readers could clearly, or at least partially, review the newest technologies and progresses in clean combustion technology.

Dr. Jianguo Zhu
Dr. Mingxin Xu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • flameless combustion
  • preheating combustion
  • flexible combustion
  • low load
  • peak shaving
  • pollutants formation and control
  • combustion optimization
  • industrial application

Published Papers (1 paper)

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Research

17 pages, 6506 KiB  
Article
Experimental Studies on Preheating Combustion Characteristics of Low-Rank Coal with Different Particle Sizes and Kinetic Simulation of Nitrogen Oxide
by Jiahang Zhang, Jianguo Zhu and Jingzhang Liu
Energies 2023, 16(20), 7078; https://doi.org/10.3390/en16207078 - 13 Oct 2023
Viewed by 656
Abstract
Low-rank coal, accounting for 45% of the global coal reserves, is easier to use in terms of realizing ignition and stable combustion due to its relatively high levels of volatile content. But the problem of low-rank coal combustion is that its NO formation [...] Read more.
Low-rank coal, accounting for 45% of the global coal reserves, is easier to use in terms of realizing ignition and stable combustion due to its relatively high levels of volatile content. But the problem of low-rank coal combustion is that its NO formation is in the range of 300–600 mg/m3, which makes the emission’s meeting of the environmental regulation quite difficult or uneconomic. Preheating combustion was a prospective combustion technology which involved preheating in a circulating fluidized bed (CFB) first and then combustion in a combustor for preheated fuel. With three particle sizes (0–0.355 mm, 0–0.5 mm, and 0–1 mm), some experiments were carried out in a 30 kW test rig. The results showed that, in the CFB preheating, a particle size of 0–1 mm had the highest coal-gas heating value due to a long residence time. The release of species in the CFB preheating always followed the order H > N > C > S. For preheated fuel combustion, a particle size of 0–0.355 mm showed the fastest combustion velocity, with the highest temperature point near the nozzle. For all three particle sizes, the combustion of preheated fuel showed a uniform temperature distribution with a small temperature difference. The lowest NO emission was 105 mg/m3 for the particle size of 0–0.5 mm. A GRI-Mech 2.11 mechanism was used to simulate the formation of NO with different influencing factors, such as temperature, oxygen concentration, and secondary-air ratio. There was a good agreement between the experimental data and the simulation’s results. The simulation showed that the NO formation could be further decreased with an optimal secondary-air ratio. This investigation provides support for the basic understanding of preheating-combustion technology and potential industrial applications in the future. Full article
(This article belongs to the Special Issue Optimization of Efficient Clean Combustion Technology)
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