Measuring and testing – Volumetric content measuring
Patent
1998-10-14
2000-04-25
Williams, Hezron
Measuring and testing
Volumetric content measuring
73215, G01F 120
Patent
active
060530391
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an apparatus for the measurement of the rate of liquid flow through a liquid/air separator.
It is fairly common in paper machines and the like to use water separators built of concrete. Such water separators are usually the size of a small room. An air/water flow is passed into them by suction from at least one source. So far it has been very difficult to measure the amounts of water involved.
The object of the present invention is to achieve an apparatus which makes it possible to avoid the drawbacks of prior art and to measure the above-mentioned water quantities.
The apparatus of the invention has numerous significant advantages. Using this apparatus, it is possible to measure water quantities flowing into the liquid separator at a very high rate of flow. The invention also makes it possible to perform measurements inside water separators in paper machines, allowing a very high measurement accuracy to be achieved.
In the following, the invention is described by the aid of a preferred example by referring to the attached drawings, in which
FIG. 1 presents a sectioned side view of an apparatus as provided by the invention,
FIG. 2 presents the apparatus sectioned along line A--A in FIG. 1,
FIG. 3 presents a detail of FIG. 1, and
FIG. 4 presents a detail of FIG. 1 as seen from the direction of arrow B.
The water separator of paper machines and equivalent is formed in a chamber space delimited by walls 1. The walls may be made of concrete and the chamber space is of a size corresponding to a small room. A mixture of liquid and air is passed into the chamber space through at least one inlet duct 2, preferably from the upper part of the chamber. In the chamber space, the liquid is separated and it is removed via at least one liquid outlet duct disposed in the lower part of the chamber, preferably by means of a pump device 4. The air is removed from the chamber preferably via an air outlet duct 3 disposed in the upper part of the chamber, preferably by means of a vacuum pump. The level 5 of the liquid gathered in the lower part of the chamber space is maintained below a desired maximum height by means of the pump device 4.
In the inlet duct 2, air and liquid flow at a high rate. The inlet duct 2 usually extends to the inside of the chamber space, and a part of the wall of the duct portion inside the chamber space has been removed, preferably the tube has been cut longitudinally in two halves over a certain length and one half of the tube thus split has been removed. This promotes the separation of air. Placed under the inlet duct 2 is receptacle 6 for flow measurement. The receptacle is divided into two parts: an inflow compartment 7, such as a smoothing compartment where the liquid is gathered into the receptacle and its velocity is slowed down, and a measuring compartment 8.
In an apparatus as illustrated by the figure, the liquid flow is slowed down by allowing the liquid to flow from the inflow compartment 7 through an opening in the lower part of the partition 13 between the inflow compartment and the measuring section 8, said opening extending across the whole width of the receptacle, into the measuring section 8. In the measuring section, the amount of water is determined by the weir flow metering technique. In this case, at least one of the walls of the measuring section 8 is provided with a gap 9 through which the liquid is passed onto the bottom of the chamber space. In the weir flow metering procedure, the measuring receptacle 6 is above the surface level 5 of the liquid on the bottom of the chamber space. The partition 13 is preferably used as a guide plate to pass the water down in a controlled manner. The lower edge of the partition 13 is below the lower edge of the gap 9, so the separated water will flow between the 25 lower edge of the partition and the bottom of the receptacle 6. In this way, the flow is smoothed down and the water seal thus formed prevents the access of air into the measuring compartment 8 of the receptacle.
The surface level (which is proporti
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Ecopump OY
Soliz Chad
Williams Hezron
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