SU191891A1 - DEVICE FOR QUANTITATIVE DETERMINATION OF DISPERSED WATER IN A FLOW OF GAS FLUID - Google Patents

Description

The present invention relates to the field of analysis - to the determination of dispersed water in a stream of liquid or gas, for example, in a hydrocarbon fuel or in air, by an electrolytic method.

Instruments are known for determining the content of dispersed water in a stream of liquid or gas by measuring electrical conductivity. Devices contain a nozzle and a detector (external and internal electrodes). The nozzle is made perforated, and the detector - in the form of a cylindrical body, inside which is placed the electrode.

The instruments are placed with a perforated surface in the opposite direction to the flow of liquid or gas. In such devices, water droplets, penetrating through the perforations, do not adhere sufficiently tightly, with the result that the resulting water bridges have resistance, which violates the accuracy of the determination. In addition, in the process of determination, due to various impurities, foreign bodies in the liquid or gas, the electrodes are prone to clogging, which is reflected in the analysis. Cleaning devices is laborious.

A distinctive feature of the proposed device is that the external electrode is made in the form of a conical nozzle with holes around the periphery and with a rod fixed at the base, and the internal electrode represents the end of the detector's cylindrical body located over the perforated part and overlapping the nozzle holes. The opposite end of the cylindrical housing of the detector is made in the form of a truncated cone, opposite which there is a bowl-shaped flap facing the inside, facing the detector, and the nozzle bar is spring-loaded, placed inside the cylindrical body and fixed in the flap.

FIG. 1 shows the proposed device, side view, installed in a typical fuel line; in fig. 2 - the same, in a section; in fig. 3 - the same, front view.

The device consists of a nozzle, detector and flap.

The detector comprises a housing / cylindrical with a truncated conical part 2. In the case there is an isolator separating the outer part 5 from the inner part 4. The front part 5 of the outer part 3 forms an EI electrode. In the center of the body there is an axial metal bushing 6 in which the rod 7 of the nozzle 8 is located. On the rod 7 there is a spring 9 mounted with one end on the shoulder 10, formed by tapering //, and the other end on the shoulder 12 of the rod 7. The nozzle 8 has circumferentially 13 rows of through holes 14. Front 15 of the nozzles 8

conical, and rear 16 - flat. The rear part 1b oozes the second electrode iig.

The rear end of the stem / is attached to the cup by the i7 shutter. The flap has a flat wall 1 with a 7U scoop, sitting on the insulator, when the detector is in the non-operating position. A part of the fuel flowing around the detector enters the annular gap U between the flat wall / 6 and the truncated conical part, which causes the shutter J / to move to the rear position, which contributes to the displacement of the rear part 16 of the nozzle 6 to the insulator. The rear part 1b of the nozzle on the insulator forms a gap between the jbi electrodes and the inner part 4 is connected by a contact 2J installed at the end of the support 22. The support is screwed into the body boss with the upper condom /. Pin 2 is a conductor for electrode .2, so electrical resistance can be measured by an electrical device.

The support 22 is attached to a plate 23 covering the hatch 24 to inspect the pipeline. A hole is drilled to secure support 22 to plate 2. The length of the support must ensure that the detector is installed along the pipeline axis.

The contact 2J is pressed by the spring to the end of the support 22, which ensures contact with the inner 4 part of the housing, and also gives the chance to pass a small current to the nozzle S.

Bearing 22 is provided with annular gaskets 25 and 26 at the points of connection with the detector housing and plate 23, which ensures the tightness of the instrument.

In operation, the detector mounted on the onore 22 is screwed into the opening of the plate 23 and installed in the center of the pipeline along the axis of the fluid flow. While there is no fluid movement, the electrode of the nozzle 8 is at some distance from the body, equal to the free travel of the rod 7, due to the force of the spring 9.

When fluid flow is present, its pressure on the nozzle 8, as well as the force acting on the bevels 19 of the flap 17, overcomes the force of the spring 9 and the nozzle is pressed against the isolator, and between the rear part 16 (Ez) of the nozzle and the front part 5 (i) of the body gap. The width of the gap is determined by special requirements. When the flow of fluid stops, the spring returns the nozzle to its original position, and the gap is restored. Due to such an instrument implementation, substances that may be stuck in the gap are thrown away, and the detector self-cleans.

With " fluid, part of it enters the detector through the holes 14 in the nozzle 8 and rotates at a right angle to the axis of movement. Due to the fact that the direction of the fluid varies sharply at a right angle to the direction of flow of a water droplet smaller than the size of the gap, they stick together and form conductive bridges over the cross section of the gap. The creation of such water bridges depends on the amount of emulsified water.

The device detects the presence of free water in hydrocarbon mixtures at concentrations of 5 hours per 1 million.

A small voltage is applied to the EI and ES electrodes.

If necessary, the installation of the gap between the electrodes can be calibrated by large drops.

With a gap of about 50 microns, the presence of small water droplets — 6 microns — and less (after the final filtering) —is detected only by reading on the high resistance meter of the ammeter.

The action of an electromagnet can be used to open a gap in a stream when it clogs.

Subject invention

Claims (2)

1. An instrument for the quantitative determination of dispersed water in a stream of liquid or gas, for example, in a hydrocarbon fuel or in air, containing an external electrode made in the form of a perforated nozzle mounted perpendicular to the flow, and an internal electrode with a cylindrical detector body, characterized by that, in order to improve the accuracy of the determination, the external electrode is made in the form of a conical nozzle with holes around the periphery and with a rod fixed at the base, and the internal electrode is the end of the detector's cylindrical body located opposite the perforated part and overlapping the nozzle holes. 2. The apparatus according to claim 1, characterized in that, in order to self-clean the electrodes from clogging, The end of the cylindrical detector housing opposite to the end face is made in the form of a truncated housing, opposite which a cup-shaped damper facing the inside is facing the detector, and the nozzle stem is spring-loaded, placed inside the cylindrical housing and fixed in the damper.