{"title":"分解炉中O2/CO2燃烧的数值模拟","authors":"Bo Wang, H. Kao","doi":"10.2298/tsci221217073w","DOIUrl":null,"url":null,"abstract":"The cement industry has become the second largest source of CO2 and NOx emissions after the power industry, it is imperative to reduce CO2 and NOx emissions. O2/CO2 combustion technology can achieve CO2 enrichment and NOx reduction. As a result, its application possibilities are bright. In this article, a TTF-type decomposition furnace serves as the research object for a CFD simulation. In addition, the effects of pulverized coal combined O2/N2 and pulverized coal mixed O2/CO2 combustion on the velocity field, temperature field, material component, and NOx concentration distribution in the furnace are investigated concerning the changes of kinetic parameters of CaCO3 decomposition under different working conditions. Compared with the O2/N2 atmosphere, the temperature distribution in the high-temperature zone of the decomposition furnace is more uniform under the O2/CO2 atmosphere. The temperature range is reduced in the area of extremely high temperatures. The NOx concentration at the decomposition furnace exit is reduced by 37%. The high concentration of CO2 at the output can be recycled and reused to reduce the greenhouse effect effectively. In addition, the high CO2 partial pressure increases the exit temperature by 111 K, doubles the O2 concentration, but decreases the raw meal decomposition rate from 95.9% to 82.2%. The process parameters must be improved to adapt to the O2/CO2 combustion technology.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Numerical simulation of O2/CO2 combustion in decomposition furnace\",\"authors\":\"Bo Wang, H. Kao\",\"doi\":\"10.2298/tsci221217073w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The cement industry has become the second largest source of CO2 and NOx emissions after the power industry, it is imperative to reduce CO2 and NOx emissions. O2/CO2 combustion technology can achieve CO2 enrichment and NOx reduction. As a result, its application possibilities are bright. In this article, a TTF-type decomposition furnace serves as the research object for a CFD simulation. In addition, the effects of pulverized coal combined O2/N2 and pulverized coal mixed O2/CO2 combustion on the velocity field, temperature field, material component, and NOx concentration distribution in the furnace are investigated concerning the changes of kinetic parameters of CaCO3 decomposition under different working conditions. Compared with the O2/N2 atmosphere, the temperature distribution in the high-temperature zone of the decomposition furnace is more uniform under the O2/CO2 atmosphere. The temperature range is reduced in the area of extremely high temperatures. The NOx concentration at the decomposition furnace exit is reduced by 37%. The high concentration of CO2 at the output can be recycled and reused to reduce the greenhouse effect effectively. In addition, the high CO2 partial pressure increases the exit temperature by 111 K, doubles the O2 concentration, but decreases the raw meal decomposition rate from 95.9% to 82.2%. The process parameters must be improved to adapt to the O2/CO2 combustion technology.\",\"PeriodicalId\":23125,\"journal\":{\"name\":\"Thermal Science\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Thermal Science\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.2298/tsci221217073w\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"THERMODYNAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thermal Science","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.2298/tsci221217073w","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"THERMODYNAMICS","Score":null,"Total":0}
Numerical simulation of O2/CO2 combustion in decomposition furnace
The cement industry has become the second largest source of CO2 and NOx emissions after the power industry, it is imperative to reduce CO2 and NOx emissions. O2/CO2 combustion technology can achieve CO2 enrichment and NOx reduction. As a result, its application possibilities are bright. In this article, a TTF-type decomposition furnace serves as the research object for a CFD simulation. In addition, the effects of pulverized coal combined O2/N2 and pulverized coal mixed O2/CO2 combustion on the velocity field, temperature field, material component, and NOx concentration distribution in the furnace are investigated concerning the changes of kinetic parameters of CaCO3 decomposition under different working conditions. Compared with the O2/N2 atmosphere, the temperature distribution in the high-temperature zone of the decomposition furnace is more uniform under the O2/CO2 atmosphere. The temperature range is reduced in the area of extremely high temperatures. The NOx concentration at the decomposition furnace exit is reduced by 37%. The high concentration of CO2 at the output can be recycled and reused to reduce the greenhouse effect effectively. In addition, the high CO2 partial pressure increases the exit temperature by 111 K, doubles the O2 concentration, but decreases the raw meal decomposition rate from 95.9% to 82.2%. The process parameters must be improved to adapt to the O2/CO2 combustion technology.
期刊介绍:
The main aims of Thermal Science
to publish papers giving results of the fundamental and applied research in different, but closely connected fields:
fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes
in single, and specifically in multi-phase and multi-component flows
in high-temperature chemically reacting flows
processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering,
The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.