SU983515A1 - Device for investigating hydrocarbon mixtures - Google Patents

Description

(54) DEVICE FOR RESEARCH OF HYDROCARBON MIXTURES

 This invention relates to physicochemical studies of the properties of a substance, in particular hydrocarbon mixtures.

The known installation of Cyclis and Maslennikov for the study of phase equilibrium gas-gas, containing a high-pressure vessel made of non-magnetic steel, a magnetic stirrer consisting of a mixing element, a core and a solenoid, valves, a valve box, a bellows and an air thermostat (ij.

However, the installation has a complex structure. In addition, the use of air as a coolant does not provide for sufficiently rapid heating of the high-pressure vessel.

The closest to the proposed design and the achieved effect is a device for the study of hydrocarbon-containing mixtures, comprising a body of non-magnetic material, an inductor located outside the body, mixing with a method made in the form of a rod of magnetic material placed in the body along its axis t 2.

 A disadvantage of the known device is that insertion of a gear pump into the body significantly complicates its design, and a drive device is required for the operation of a gear pump, which, in turn, reduces the efficiency of mixing and the whole process.

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The aim of the invention is to intensify the processes by improving the mixing of the tested mixtures.

15

This goal is achieved by the fact that the device for the study of hydrocarbon mixtures, contains. a housing made of a non-magnetic material, an inductor, a housing located outside the housing, a mixing device, made in the form of a rod of magnetic material placed in the body along its axis, and a valve, a mixing device equipped with disks of magnetic material that can be reciprocated on the rod, and spacer spring, placed on the rod between

30 discs. FIG. 1 shows a device, general view, in section; in fig. 2 block diagram of the installation. The device comprises a housing 1, made of a non-magnetic material and having a valve 2 in the lower part, and a valve 3 in the upper part. Inside the housing 1 a rod 4 is placed, made of magnetic material. The rod 4 is placed along its axis and secured by two holders 5 and 6, made of a nonmagnetic material. Between the disks 7 and 8 is placed a spacer spring 9, also made of magnetic material. The center 4, the disks 7 and 8 and the expansion spring 9 form the core, which is the heat transfer element, besides, the disks 7 and 8 and the distance spring 9 are the mixing unit of the device. Outside the building includes an inductor winding 10, made of a metal tube through which cooling fluid circulates. To reduce the diffuse magnetic flux, there is an external duct 11 assembled from sheets of transformer steel. In the heat of the camera 1 is mounted sensor 12 temperatush. The housing 1 in the lower part is connected via a spindle 2 to the measuring pressure 13 of the working fluid, and in the upper part through a valve 3 by the sampler 14 and the press 15. The temperature sensor 12 is connected to the control unit 16 for controlling the temperature Controls the temperature in housing 1 and automatically maintains it at a predetermined level with an accuracy of the order of + 1 ° C. the trials. Pressure control. in case 1 is carried out on. pressure gauge 16. The device is working on the same occasion. The housing 1 is filled with a working fluid, for example a liquid non-toxic metal alloy. The press 13 creates a certain pressure at which from the sampler 14 by the press 15 is introduced into the chamber 1 a certain volume of the hydrocarbon mass equal to the volume of the working fluid, which is introduced from the sample into the body. It is fixed by the press 13, the volume of the injected sample is recorded on the scale of the press 13. The temperature records from on the control unit 16, and the pressure by pressure gauge 18. The study of changes in the properties of hydrocarbon mixtures depending on the changes in pressure and temperature is carried out by building isobars and isotherms as follows. To build the isobars, they switch on the switching device 17 and apply alternating current to the inductor 10, while this core is heated. The disks 7 and 8 under the action of the magnetic field of the inductor 10 converge, compressing the spring 9, and remain in that position while the voltage is applied to the inductor 10. The temperature of the sample in the housing 1 reaches a predetermined value set on the control and temperature control unit 16, and the power supply to the inductor 10 is automatically turned off. The discs 7 and 8 under the action of the spacer spring 9 are consumed. The temperature of the sample in housing 1 decreases and becomes lower than the set value. From block 16, the switching device 17 receives a signal including voltage to inductor 10. Thus, periodically turning on and off of inductor 10 is accompanied by movement of discs 7 and 8, due to which sample is mixed in housing 1. Pressure in housing 1 is kept constant by changing the volume of the sample by the press 13 and fixing the temperature and volume of the sample. Then, at block 16, the next temperature is set and the following temperature and volume values are removed. I If necessary, an increase in the intensity of mixing during the heating process in the switching and control device 17 turns on an automatic device intermittently opening the inductor 10 power supply circuit. At the same time, the mixing unit is continuously operated and periodic heating is carried out sufficient to establish the desired temperature. As a result of the study, the isobar was determined. To build an isotherm, a certain temperature is set at block 16, switching control device 17 is turned on, setting the required heating and mixing mode. Heat the sample to a predetermined temperature (t const). Using a measuring press 13, the steps change the volume (V) of the sample and the pressure (.P) in the housing 1. At each stage, V, P is fixed and the isotherm V f (P) is built. In; If there is no need for heating to remove the isotherm, the switching device 17 periodically switches on the inductor 10 unipolar DC pulses, a current of about 0.5 seconds with a duty cycle of 5-6, which ensures movement of the disks 7 and 8 (mixing). Thus, the installation at the ends of the rod 4 of the discs 7 and 8 with the spacer spring 9 between them and the connection of the inductor 10 to the power source through the switching control and the device 17 provide combination; the processes of heating and mixing the sample, and if necessary only mixing

The advantage of using a magnetic mixing device of the proposed design is that it is actuated without breaking the vessel tightness, which is important for high pressure vessels, since the condition for maintaining tightness during the research process is the need for them.

Heating of the test sample is solved for limestones of heaters. However, the design of the mixing unit and the connection of the inductor to the power source through a switching and control device made it possible to combine heating and mixing processes constructively in a single design, which gives significant advantages in the simplicity of production and operation of the proposed design.

Simplification of the design makes the device more accessible, provides a wide distribution and, therefore, creates conditions for increasing the amount of information on the study of reservoir oils in the volumes necessary for the needs of the oil industry, which does not preclude the use of the device in adjacent areas.

Claims (2)

1. Tsiklis D.S. Stratification of gas mixtures. M., Himi, 1969. 2. Authors certificate of the USSR 527840, cl. H 05 H 5/08, 197fi. : 50ilfGOm