SU1249428A1 - Device for determining quantity of water absorbed in hydrocarbon liquid - Google Patents

Abstract

A three-chamber device is proposed for determining the amount of water absorbed by the hydrocarbon liquid. The chamber (K) with water communicates through the airspace with K containing hydrocarbon liquid, which in turn communicates with a gap at the bottom of the housing with a third K also containing hydrocarbon liquid. In the second and third K capacitive primary converters are installed. Improving measurement accuracy is achieved by certain geo-. metric slot size, the size of which is equal to the interelectrode gap of capacitive transducers, and the use of the extremum extractor included in the diagonal of the bridge circuit, whose arms contain primary transducers. 1 il. c (C (L bd 4iik 4 to 00

Description

The invention relates to devices used in studies (physical properties of hydrocarbon liquids, in particular fuels and oils, and can be used in the petrochemical and oil refining industry, in studies to determine the solubility of water in hydrocarbon liquids, and the development and calibration of moisture analyzers and assessing the dewatering capacity of devices used for dewatering fuels and oils (filter separators, separators, electric cleaners, etc.).

The purpose of the invention is to increase the accuracy of water determination.

The drawing shows a functional diagram of the device for determining the amount of water absorbed by a recording potentiometer 20 by a hydrocarbon liquid. The device provides for a device consisting of Kortyca 1, which is divided by partition walls 2 and 3 into three hermetic chambers. One chamber 4 with water and two chambers 5 and 6 with a hydrocarbon liquid. The nazhid-bone spaces of chambers 4 and 5 are connected to each other through a connecting channel 7 with a shut-off valve 8. Chambers 5 and 6 communicate with the hydrocarbon fluid through a slot 9 between the bottom of the device and the end face of the partition 3. Chamber 4 with water and chamber 5 s. the hydrocarbon liquid is provided with hermetically sealed openings (not shown), designed with dp inlet and outlet, respectively, of water and hydrocarbon liquid. In the chamber 5 there is a capacitive primary transducer 1 O, filled in the form of two coaxially arranged cylindrical electrodes installed vertically with a gap, the interelectrode gap d of which is equal to the distance from the electrodes to the bottom of the chamber, and in the chamber 6 - the second capacitive primary transducer 11 located in relation to the slotted hole 9 is symmetrical to the first and similar to it. The bottom ends of the electrodes are installed) from the bottom

Determining the amount of water absorbed by the hydrocarbon liquid in a given temperature and humidity saturation mode, performs corpus 1 at a distance of at least 2 d .. The lower end of the partition 3 is set to 55 s as follows, flax at a distance from the bottom of the chamber equal to half the distance Neither the ends of the Water in the chamber 4 are evaporated by the electrodes to the bottom of the chamber, i.e. on j giving 100% relative humidity equal to d .. Such a gap value provides the maximum possible current imbalance at the output of the recorder - emitter

12 extremum due to the fact that the interelectrode space in chamber 5 is completely saturated with moisture from chamber 4, and the saturation of moisture in the hydrocarbon liquid in chamber 6 through

hole 9 hasn't started yet. In realized construction d, 7.5 mm.

The outputs of the primary transducers included in the bridge measuring circuit. In one diagonal of the bridge an alternator 13 is turned on, and the other diagonal of the bridge is connected to an extremum separator 12. As an extremum isolator, measuring amplifiers with

powerful measuring instruments for determining the composition of the water coming in. camera 5. Measurement is performed

by electrometric titration method using Fisher reagent. There is also a temperature control in all three chambers when the fluid is heated to amer 4.

The device works as follows.

In the chamber 5, through the corresponding hole in the cap, a sample of the analyzed hydrocarbon fluid is introduced.

ti. At the same time, its amount is chosen so that the upper ends of the electrodes of the converters 10 and II should be immersed in a liquid to a depth of at least 15 mm. Hydrocarbon

the liquid is previously dewatered with one of the desiccants (calcium chloride, anhydrite, silica gel, zeolites, etc.). Distilled water is poured into the water chamber 4 with the channel 7 closed and the opening for water inlet is closed. Heat the fluid to a predetermined temperature and establish a zero imbalance of the bridge at the output of the circuit.

Determining the amount of water absorbed by the hydrocarbon liquid in a given temperature and humidity saturation mode is carried out as follows. The water in the chamber 4 evaporates, creating a 100% relative humidity.

air at the temperature set by the thermostat. When the stopcock 8 is opened, humid air enters through the connecting channel 7 into the suprafluid space of chamber 5. As the hydrocarbon liquid is moist, the electrical capacity of the primary converter 10 installed in chamber 5 increases due to an increase in the dielectric constant of the moistened liquid, and the electrical capacity of the primary converter 11 installed in chamber 6 remains unchanged, since water molecules can penetrate into this chamber only. after complete saturation of the liquid in measure 5. The difference in the values of the electric capacitances of the primary transducers leads to the imbalance of the bridge circuit, which is fixed by the extremum separator 12.

Claims (1)

Invention Formula A device for determining the amount of water absorbed by a hydrocarbon liquid, consisting of two sealed chambers with water and coal 494284 hydrogen fluid, communicating supra-fluid spaces through a connecting channel with a shut-off valve connected to the recorder 5 of a capacitive primary converter, made in the form of cylindrical electrodes installed vertically in a chamber with hydrocarbon fluid, the half-electrode distance between the electrodes to the bottom of the chamber, characterized in that, in order to increase the accuracy of the determination of water, it is equipped with an additional (5 telite chamber communicating with the measure: liquid: by means of a slot opening located at the bottom of the chamber and of a height that is half the distance 0 from the ends of the electrodes of the primary converter to the bottom of the chamber, and containing an additional capacitive primary converter similar to the first one and installed with it 5 symmetrically, and as The recorder used an extremum detector connected to the diagonal of the bridge circuit, the shoulders of which included primary transducers. Compiled by Y. Korshunov Editor A. Shishkin Tehred G. Gerber Corrector S. Cherni Order 4229/45 Circulation 778 Subscription, VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab, d. 4/5 Production and printing company, Uzhgorod, st. Project, 4