Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter. [Patent application; monitoring char flow in coal gasifier]
Abstract
A method and apparatus for monitoring char flow in a coal gasifier system includes flow monitor circuits which measure acoustic attenuation caused by the presence of char in a char line and provides a char flow/no flow indication and an indication of relative char density. The flow monitor circuits compute the ratio of signals in two frequency bands, a first frequency band representative of background noise, and a second higher frequency band in which background noise is attenuated by the presence of char. Since the second frequency band contains higher frequencies, the ratio can be used to provide a flow/no flow indication. The second band can also be selected so that attenuation is monotonically related to particle concentration, providing a quantitative measure of char concentration.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 6307585
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- W-7405-ENG-38
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 01 COAL, LIGNITE, AND PEAT; COAL GASIFICATION PLANTS; FLUID FLOW; ACOUSTIC MONITORING; CHARS; SUSPENSIONS; DISPERSIONS; INDUSTRIAL PLANTS; MONITORING; PYROLYSIS PRODUCTS; 010404* - Coal, Lignite, & Peat- Gasification
Citation Formats
Roach, P D, and Raptis, A C. Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter. [Patent application; monitoring char flow in coal gasifier]. United States: N. p., 1980.
Web.
Roach, P D, & Raptis, A C. Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter. [Patent application; monitoring char flow in coal gasifier]. United States.
Roach, P D, and Raptis, A C. Mon .
"Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter. [Patent application; monitoring char flow in coal gasifier]". United States.
@article{osti_6307585,
title = {Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter. [Patent application; monitoring char flow in coal gasifier]},
author = {Roach, P D and Raptis, A C},
abstractNote = {A method and apparatus for monitoring char flow in a coal gasifier system includes flow monitor circuits which measure acoustic attenuation caused by the presence of char in a char line and provides a char flow/no flow indication and an indication of relative char density. The flow monitor circuits compute the ratio of signals in two frequency bands, a first frequency band representative of background noise, and a second higher frequency band in which background noise is attenuated by the presence of char. Since the second frequency band contains higher frequencies, the ratio can be used to provide a flow/no flow indication. The second band can also be selected so that attenuation is monotonically related to particle concentration, providing a quantitative measure of char concentration.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Nov 24 00:00:00 EST 1980},
month = {Mon Nov 24 00:00:00 EST 1980}
}