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Title: Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter

Abstract

A method and apparatus for monitoring char flow in a coal gasifier system cludes flow monitor circuits which measure acoustic attenuation caused by the presence of char in a char line and provide 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:
 [1];  [2]
  1. Darien, IL
  2. Downers Grove, IL
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
864383
Patent Number(s):
4357603
Assignee:
United States of America as represented by Depart of Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01P - MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; acoustically; monitoring; flow; suspended; solid; particulate; matter; char; coal; gasifier; monitor; circuits; measure; acoustic; attenuation; caused; presence; line; provide; indication; relative; density; compute; ratio; signals; frequency; bands; band; representative; background; noise; attenuated; contains; frequencies; selected; monotonically; related; particle; concentration; providing; quantitative; solid particulate; coal gasifier; particulate matter; coal gas; particle concentration; background noise; flow monitor; frequency band; quantitative measure; flow indication; suspended solid; frequency bands; monitoring char; acoustic attenuation; attenuation caused; /340/73/

Citation Formats

Roach, Paul D, and Raptis, Apostolos C. Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter. United States: N. p., 1982. Web.
Roach, Paul D, & Raptis, Apostolos C. Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter. United States.
Roach, Paul D, and Raptis, Apostolos C. Fri . "Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter". United States. https://www.osti.gov/servlets/purl/864383.
@article{osti_864383,
title = {Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter},
author = {Roach, Paul D and Raptis, Apostolos C},
abstractNote = {A method and apparatus for monitoring char flow in a coal gasifier system cludes flow monitor circuits which measure acoustic attenuation caused by the presence of char in a char line and provide 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 = {1982},
month = {1}
}

Patent:

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