SU1725952A1 - Arrangement for adding demulsifier to oil flow - Google Patents

Abstract

The invention / relates to devices for introducing reagents into the oil stream. The goal is to increase the intensity of the de-emulsification process and simplify the device. The main pipeline is provided with a bypass pipeline, the inlet and outlet nozzles of which are located respectively after the second row of holes along the oil flow and before the first row of holes. A reagent collector is installed above two rows of holes. 3 h. nt fly, 1 ill.

Description

The invention relates to devices intended for. chemical introduction into the oil flow, for example, in the processes of desalting and dehydration of oil.

The aim of the invention is to intensify the process of oil demulsification and simplify the device.

This goal is achieved by the fact that in a device for injecting a demulsifier into the oil flow, including a main pipe with two rows of holes arranged along the pipe, a collector installed above the rows of holes and connected to the deemulgator supply pipe, has a main pipe with nozzles , while the inlet of the first nozzle, located behind the second along the flow of oil, next to the hole, is oriented towards the flow of oil, and the outlet of the second nozzle, located in front of the first in the course of the oil flow, the row of holes is oriented along the flow of oil. The centers of the holes of the nozzles are located on the axis of the main pipe. The bypass pipeline is equipped with a throttle valve. The second nozzle is equipped with a diffuser tip.

In the device according to the invention, when the speed of the emulsion is varied, the maintenance of a constant speed in the supply zone of the de-emulator is ensured by recycling. In this case, with a constant distance between the rows of jets, uniform distribution of the flow is ensured with cyclical input of de-emulators. The absence of moving parts greatly simplifies the device and increases its reliability.

The device maintains a stable process for the demulsification of the oil when the operating conditions change, in particular the speed of transportation of the emulsion. Supplying the second nozzle with a diffuser tip allows, other things being equal, to increase the degree of recirculation (this increases the pressure drop between the inlet and outlet openings of the bypass pipeline), and consequently, adjustments are possible.

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device. The throttle valve on the bypass pipeline allows for varying the degree of recirculation, and the location of the inlet and outlet holes on the axis of the main pipe allows you to avoid global heterogeneity due to the presence of bodies in the flow section that block the flow section.

The drawing is a schematic diagram of the device.

The device comprises a main pipe 1, a collector 2, which communicates with the supply pipe of the demulsifier 3 from a dosing pump (not shown). Collector 2 is installed above two rows of holes 4 and 5, Main pipe 1 is equipped with a bypass conduit b, which has nozzles 7 and 8. Inlet 9 of the first nozzle 7 located above the second along the oil flow row of holes 5 is located opposite to flow. The outlet 10 of the second nozzle 8, in front of the first along the flow of the neti near the holes 4, is located along the flow of the emulsion. Nozzles 8 provided with a diffuser tip 11, and the bypass pipeline b contains the throttle valve 12.

The operation of the device is as follows.

The demulsifier with the help of a plunger-type metering pump through pipe 3 enters the collector 2, and from it through two rows of holes A and 5 it expires as a system of transverse jets into the flow of the emulsion. The demulsifier feed circuit determines the possibility of intensive mass exchange with the emulsion flow and effective de-emulsification of the oil. A portion of the emulsion flow, after the second row of holes 5, enters the bypass conduit 6 and is re-introduced into the flow of the emulsion through it before the inlet section of the demulsifier jets. Using the throttle valve 12. provides a change in the flow rate of the emulsion coming through the bypass pipeline 6. Thus, when the speed of the emulsion is changed using the bypass pipeline b, the constant speed in the input area is maintained

demulsifier jets. So with an increase in the speed of transportation of the emulsion it is necessary to reduce the consumption of the emulsion coming through the pipeline b, and

by reducing the transportation speed, on the contrary, to increase the flow rate coming through pipeline 6. Thus, in the injection zone of the demulsifier jets, the distribution of the demulsifier is stable

flow section and stable high-performance mass transfer of the emulsion and the demulsifier.

The use of the proposed technical solution allows to provide

effective demulsification of oil, reduce the required consumption of the demulsifier, increase the reliability of operation of devices that implement the process of demulsification.

Claims (4)

1. A device for introducing a demulsifier into the oil flow, comprising a main pipe with two rows of holes arranged along the pipe, a collector installed above the rows of holes and communicating with the demulsifier supply nozzles, characterized in that. In order to intensify the demulsification process and simplify the device, the main pipe is equipped with a bypass pipeline with two nozzles, while the inlet of the first nozzle located behind the second row of holes along the oil flow is oriented towards the flow of oil, and the outlet of the second nozzle, located in front of the first in the course of the flow of oil a series of holes, is oriented along the flow of the oil. 2. The device according to claim 1, wherein the centers of the nozzles of the nozzles are located on the axis of the main pipe. 3. The device according to claim 1, characterized by the fact that the bypass pipeline is equipped with a throttle valve. 4. Device pop. 1, characterized in that the second nozzle is provided with a diffuser tip.