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Title: 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 TIC; ERA-06-034228; EDB-81-114080
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 = {1980},
month = {11}
}