SU1423952A1 - Method of determining the moisture content of fluid media in a stream - Google Patents

Description

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The invention relates to a measurement technique, in particular to the measurement of the moisture content of liquids by a dielectric method.

The aim of the invention is to improve the accuracy of measuring the moisture content of liquid media in a stream by eliminating the effect on the measurement result of the initial relative dielectric constant of the controlled medium.

The essence of the proposed method is that the flow of the controlled medium is divided into two separate streams, one of which is continuously supplied with a set of water:; and the Humidity of the medium in the flow p is not mixed into which water is not added .

W Yii

, 4G

(one)

W, is the humidity of the environment, dol.

Vc

9t

V.

and-25

 the amount of water and the medium, respectively, which passed through the primary transformer "

The dielectric constant of the emulsion is determined by the formula

H, „().

(2)

Uv-g

n / v.

-the amount of water added to the controlled flow;

- the ratio of the amount of water added to the amount of the controlled medium that passed through the second primary converter.

The dielectric constant of the fluid in the second transducer is equal to the dielectric constant of the controlled medium in the first transducer;

. . (Hf) E, (t.-)

,,) 1 H2Wi + 3k,

i-Wi RY;

(five)

 rk 1 The joint solution of equations (2) and (5) allows to obtain the formula

1-2Wi4-3k

1-Wi 1 + 2W, + 3k,

s, 1-w,

H-2W,

(6)

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Denoting a relationship, you can

ti get

Where EH is the relative relative permittivity

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The humidity of the medium in the second stream (to which continuously set water flow is added) can be determined by the formula

W.

v s, + Vsi VI,

M - S2

or after transformation

W,

W, -bk,

(four)

t-5-k

V and V - the number of, respectively, water and environment in a controlled stream with humidity. W, which passed through the second primary converter

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 1-N-h3k, 2 (N-1)

(7)

0

0

five

Calculated by the formula (7) the value of humidity W, the controlled medium is not the initial dielectric constant of the controlled medium, 5 which increases the measurement accuracy.

The determination of humidity is greatly simplified; if the ratio of the added water consumption to the controlled medium consumption (k const) is kept constant. For this, it is sufficient to vary the flow rate of the water added to this flow with a change in the flow rate of the controlled medium through the converter. The moisture value, besides calculating by the formula (7), can be determined according to the schedule (N, k

f 1 const) j measuring the ratio.

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The application of the proposed method for determining the moisture content of liquid media makes it possible to increase the accuracy and reduce the temperature.

time of measurement. It can also be a sample of a controlled environment that is used in instruments for measurements that leads to economic fatigue, wherever this trepecta is due to the reduction of energy consumption; the production of a dehydrated emulsion dehydration.

Claims (2)

1. METHOD FOR DETERMINING THE HUMIDITY OF LIQUID MEDIA IN A FLOW, which consists in dividing a fluid stream into two separate streams, each of which is passed through its primary transducer, which consists in that, in order to increase the measurement accuracy by eliminating the influence of the initial relative dielectric constant of the controlled medium, a predetermined water flow rate is additionally continuously fed into one of the flows, and the dielectric constant of the flows is measured, with respect to which, taking into account the ratio of water flow to flow The required parameter is determined as the flow of the controlled medium passing through the same primary transducer is determined. 2. The method according to claim 1, characterized in that the added flow rate is directly proportional to the flow rate of the controlled medium flowing through the same primary transducer. <g ω 23952