Vacuum extraction sampling system
First Claim
1. An apparatus for collecting a sample stream from a system containing water vapor and at least one other gas comprising:
- a) a collection probe adapted to draw the sample stream from the system;
b) a particulate filter connected to the collection probe so that the sample stream will flow therethrough;
c) a conduit connected at one end to the particulate filter and suited for connection at another end to an analyzer, the conduit having an orifice sized to permit the sample stream to flow through the conduit at a sampling rate of from 5 cc. to 250 cc. per minute; and
d) at least one pump connected to the conduit for drawing a vacuum on the sample stream.
4 Assignments
0 Petitions
Accused Products
Abstract
A gas sampling system utilizes small sample vacuum transport to reduce the dew point of the sample. A vacuum pump maintains a substantial vacuum on the sampling system causing a sample, drawn at a rate less than a liter per minute, to be drawn and transported under partial vacuum for analysis. A dryer can be placed near the sampling probe to further reduce the dew point prior to the vacuum transport. The dew point of the sample is affected by both the dryer and the degree of vacuum transporting the gas mixture. As such, the dew point can be varied indefinitely by any reasonable combination of moisture removal by the dryer and vacuum pump strength.
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Citations
26 Claims
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1. An apparatus for collecting a sample stream from a system containing water vapor and at least one other gas comprising:
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a) a collection probe adapted to draw the sample stream from the system; b) a particulate filter connected to the collection probe so that the sample stream will flow therethrough; c) a conduit connected at one end to the particulate filter and suited for connection at another end to an analyzer, the conduit having an orifice sized to permit the sample stream to flow through the conduit at a sampling rate of from 5 cc. to 250 cc. per minute; and d) at least one pump connected to the conduit for drawing a vacuum on the sample stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of extractive sampling from a system containing water vapor and at least one other gas comprising the steps of:
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a) placing a sampling probe in the system; b) drawing a vacuum on the sampling probe to collect a sample and to induce the sample to flow from the system at a sampling rate of from 5 cc. to 250 cc. per minute; c) transporting the sample to at least one analyzer through an elongated conduit and d) further adjusting the vacuum on the sample to maintain a dew point of the sample within a preselected temperature range. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification