98/03985 Particle size and velocity measurements in the radiant section of an industrial-scale, coal-fired boiler: the effect of coal type

1998 ◽  
Vol 39 (5) ◽  
pp. 373
Nanoscale ◽  
2021 ◽  
Author(s):  
Sofia Marchesini ◽  
Piers Turner ◽  
Keith Paton ◽  
Benjamen P Reed ◽  
Andrew John Pollard

Graphene is now being produced on an industrial scale and there is a pressing need for rapid in-line measurements of particle size for Quality Assurance and Quality Control (QA/QC). Standardised...


2016 ◽  
Vol 78 (6-4) ◽  
Author(s):  
Rattapong Tritippayanon ◽  
Veeraya Jiradilok ◽  
Pornpote Piumsomboon ◽  
Benjapon Chalermsinsuwan

The unsteady state computational fluid dynamics model for gas-solid particle flow in industrial scale circulating fluidized bed boiler combining with combustion and desulfurization (using limestone solid sorbent) chemical reactions, both homogeneous and heterogeneous, was developed in this study. The effects of solid sorbent feeding position and solid sorbent particle size on sulfur dioxide concentration were investigated. The results showed that both the solid sorbent feeding position and solid sorbent particle size had an effect on the sulfur dioxide capture. Entering solid sorbent at the upper secondary air position gave lower sulfur dioxide concentration than the one at the lower secondary air position and fuel feed position, respectively. This can be explained by the influence of suitable temperature at the upper secondary air position for desulfurization chemical reaction. About the solid sorbent particle size, the sulfur dioxide capture was the lowest when using the largest solid sorbent particle size due to the system hydrodynamics. 


2012 ◽  
Vol 1479 ◽  
pp. 21-26 ◽  
Author(s):  
Kathrin Hielscher

ABSTRACTUltrasonically generated forces are well known for dispersing and deagglomeration of small volumes in laboratory and bench-top scale. By the evaluation and optimization of the most important ultrasonic parameters and the development of large scale ultrasonic machinery, ultrasound forces can be applied also for particle size reduction and wet-milling of nano-particles in industrial scale.


2020 ◽  
Vol 11 (1) ◽  
pp. 72
Author(s):  
Marcio Eduardo Marquez ◽  
Fabrício Celso

ResumoA necessidade de encontrar meios para reciclar materiais que até então eram apenas descartados no meio ambiente traz também a necessidade de conhecermos a viabilidade de alguns processos em meio industrial, avaliando-os não apenas financeira, mas também tecnicamente, por meio do uso de equipamentos de fácil acesso, manuseio e manutenção. Pensando nisso, este trabalho busca aplicar o processo de trituração por moinho de facas a espumas flexíveis de poliuretano, nas quais ainda se percebe carência de estudos em se tratando de sua redução de partículas por meio de processos industriais. Com o uso de um moinho de facas, buscou-se moer aparas da fabricação de assentos sanitários, sendo que a capacidade do processo e a granulometria final do material triturado foram quantitativamente avaliados e o fluxo de material bem como a moagem em si, foram avaliados qualitativamente. Com uma capacidade aproximada de 1 kg/h, uma granulometria apresentando 46,3% das partículas com dimensões de 2,01 a 4,00mm, fluxo e moagem insatisfatórios, este processo, tal como estudado neste trabalho, foi considerado ineficiente na busca de trituração da espuma flexível de poliuretano, mantendo a necessidade de buscar ainda, em meio industrial, solucionar um problema de processo de reciclagem deste material.Palavras-chave: Espuma Flexível de Poliuretano. Moinho de facas. Capacidade. Granulometria. ABSTRACTThe need of to find ways to recycle materials those only were leave on the environment, brings the need in to know the viability of some processes in industrial scale, evaluating them not just financially form but technically to, by the use of commun, and cheaps, and easily maintenece equipements.Therefore, this paper aims to apply the grind process by knife mill to flexible polyurethane foams those don’t has a great variety of studys about their reduction particle size by processes in industrial scale. Using a knife mill, some foam burrs from the toilet seat fabrication were grinded, and the process capability, as much as the material granulometry, were quantitatively measured. The material flow into the knife mill and the grinder process were qualitatively evaluated. With a capability around 1 kg/h and a granulometry with 46,3% of the particules size around 2,01 to 4,00mm, and flow, and grind unsatisfactory, this process, in that way, was considerd inefficient in find a form of to grind flexible polyurethane foam, and it takes necessary, in industrial way, to solve a problem for reciclyng these kind of material.Keywords: Flexible polyurethane foam. Knife mill. Capability. Granulometry.


Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1356 ◽  
Author(s):  
Jacek Połomka ◽  
Andrzej Jędrczak ◽  
Sylwia Myszograj

The data published by the European Container Glass Federation shows that the EU28 average collection rate for recycling of glass containers has grown to a rate of 76%. However the stabilizer produced at mechanical-biological treatment (MBT) installations at landfills still contains large amounts of recyclable glass. An industrial-scale study has been undertaken in order to assess the possibility of recovering this glass from the stabilizer. A new pilot installation was built at the MBT plant in Marszów, Poland. Tests were conducted on stabilizer samples produced at the plant (13 samples) and others collected from several MBT plants based in Poland (six samples). Processing the stabilizer on the designed line made it possible to recover on average 68.4 ± 7.0% of the glass contained in it from Marszów samples and 58.4 ± 14.2% in the case of samples acquired from other MBT installations. It is demonstrated that the concentrate quality largely depends on the stabilizer’s moisture content. A concentrate with glass content from 98.0% to 99.5% was obtained for samples of low-moisture stabilizers (for 14 out of 19 samples). The product was accepted by glass recycling plants due to its low level of contamination with other materials and its appropriate particle size.


2006 ◽  
Vol 45 (10) ◽  
pp. 2186 ◽  
Author(s):  
Alfred B. Leung ◽  
Kwang I. Suh ◽  
Rafat R. Ansari

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