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Pant, H. J.
- Measurement of Residence Time Distributions of Coal Particles in a Pressurized Fluidized Bed Gasifier (PFBG) using Radio Tracer Technique
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Authors
Affiliations
1 Corporate R&D Divn, Bharat Heavy Electrical Limited, Vikasnagar, Hyderabad, IN
2 Isotope Applications Division, Bhabha Atomic Research Centre, Mumbai, IN
3 Ex Vice Chancellor, Jawaharlal Nehru Technological University, Hyderabad, IN
1 Corporate R&D Divn, Bharat Heavy Electrical Limited, Vikasnagar, Hyderabad, IN
2 Isotope Applications Division, Bhabha Atomic Research Centre, Mumbai, IN
3 Ex Vice Chancellor, Jawaharlal Nehru Technological University, Hyderabad, IN
Source
Indian Journal of Science and Technology, Vol 5, No 12 (2012), Pagination: 3746-3752Abstract
A pressurized fluidized bed gasifier (PFBG) system of an integrated coal gasification and combined cycle (ICGCC) plant is designed to behave as a well-mixed flow system for coal; and any deviation from the well-mixed flow condition will deteriorate the performance and efficiency of the gasification system. This paper describes a radiotracer investigation carried out to measure RTDs of coal particles in a pilot-scale PFBG with objectives to determine mean residence time (MRT) of coal/ash particles in the gasifier and estimate degree of mixing at different operating and process conditions. Lanthanum-140 labeled coal (100 gm) was used as a radiotracer. The tracer was instantaneously injected into the coal feed line and monitored at ash and gas outlets of the gasifier using collimated scintillation detectors. The measured RTD was used to determine mean residence time (MRT) of coal particles within the system and simulated using fractional tank-in-series model. The results of simulation indicated that the system behaved as a well-mixed system with undesired bypassing of a small fraction coal particle from the system. The results of the study were used to improve the design of the gasifier and optimize the system.Keywords
Pressurized Fluidized Bed Gasifier, Residence Time Distribution, Radiotracer, Lanthanum-140, Tanks-in-series Model, BypassingFull Text
References
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- Applications of radioisotopes and radiation technology in industry: current status and prospects
Abstract Views :151 |
PDF Views:102
Authors
Affiliations
1 Radiochemistry and Isotope Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
1 Radiochemistry and Isotope Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
Source
Current Science, Vol 123, No 3 (2022), Pagination: 377-387Abstract
The Bhabha Atomic Research Centre (BARC), Mumbai, over the last five decades has made pioneering contributions in the development and applications of radioisotopes and radiation technology for industry, medicine and agriculture leading to significant benefits to the society. This article briefly discusses various applications of radioisotopes and radiation technology in the industry presently being pursued at BARC. The main areas of application include radiotracers and sealed sources for industrial troubleshooting, radiography and tomography for NDT applications, and nucleonic gauges for quality control in industrial processes. The radiation processing technology, on the other hand, is an effective, economical and environmentally friendly alternative to conventional methods used for various industrial processing applications. Presently, 24 gamma irradiators and 18 electron-beam machines are commercially operating in India for various radiation processing applications.Full Text
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