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Numerical Simulation of Black Liquor Atomization in Alkali Recovery Boiler Based on DPM Model
Received:July 27, 2022  
DOI：DOI：10.11980/j.issn.0254-508X.2023.03.004
Key Words:high solid content bamboo pulp black liquor  atomization performance  numerical simulation  alkali recovery  DPM
Fund Project:国家自然科学基金面上项目 （21978161）；陕西科技大学学术带头人团队项目（2013XSD25）。
Author NameAffiliationPostcode
WANG Yiwei* College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Funvtional Materials of China National Light Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
XU Yongjian College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Funvtional Materials of China National Light Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
CHEN Shenglin College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Funvtional Materials of China National Light Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
GUO Kangkang College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Funvtional Materials of China National Light Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
YUE Xiaopeng College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Funvtional Materials of China National Light Industry， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:In order to efficiently recover the chemicals and thermal energy of high solid content bamboo pulp black liquor and improve its atomization performance， DPM （ discrete phase model ） was used to simulate the atomization performance of high solid content bamboo pulp black liquor in alkali recovery boiler. And then， through the establishment of 3D model， the cold flow field of alkali recovery boiler was simulated by Fluent software. The effects of black liquor viscosity， atomization cone angle， and particle diameter on the atomization， particle distribution， and formation of melt cushion of black liquor in alkali recovery were investigated. The results showed that increasing black liquor viscosity had a significant influence on the droplet breakup， and the influence on the dispersion settlement was far less than that on the atomization cone angle and the initial droplet size. Additionally， slagging risk existed between upper and lower secondary air in front wall of alkali recovery boiler. When the droplet diameter was controlled greater than 0.5 mm， black liquid droplets mainly sank down to the cushion by gravity， and that could effectively reduce the mechanical carry of airflow.
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