Device for measuring the flow of a gas containing particulates
This patent describes an apparatus for continuously measuring the flow of a gas containing entrained particulates. It comprises: a flow channel, through which the gas flows; an orifice disposed within the flow channel, including at least a first surface and a second surface; means for causing the first surface and second surface independently to move in directions perpendicular to lines normal to the surfaces; scraping means, for intimately contacting at least a portion of the first surface and of the second surface, at all times while the surfaces are moving, whereby particulates which adhere to the first and second surfaces are removed by the movement of the surfaces past the scraping means; pressure taps, positioned so as to communicate with the flow channel upstream and downstream from the orifice, the pressure taps additionally in communication with pressure-measuring means, for measuring the pressure differential in the flow channel resulting from the passage of the gas through the orifice; and thermophoretic heaters, positioned so as to heat the gas within the pressure taps, and thereby excluding particulates therefrom.
- Assignee:
- Libbey-Owens-Ford Co., Toledo, OH (USA)
- Patent Number(s):
- A; US 4982610
- Application Number:
- PPN: US 7-398718
- OSTI ID:
- 5565058
- Country of Publication:
- United States
- Language:
- English
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