SU1377502A1 - Device for introducing inhibitor into pipe-line - Google Patents

Abstract

The invention relates to pipeline transport and is intended to introduce chemicals into the fluid flow while protecting pipelines from internal corrosion. The purpose of the invention is the expansion of technological capabilities due to the supply of a chemical agent, regardless of the density of the inhibitor and the flow being transported. The device contains an inlet chamber 1, coaxially with which a chamber 2 of an alternating cross-sectional wall with perforation 3 and an outlet chamber 4 is installed. In chambers 2 and 4, a tubular separator 5 with an inlet confuser 6, which is located in chamber I, is coaxially mounted walls 7. The perforation 3 is covered by the receiving chamber of the inhibitor 8 with the inlet 9. The liquid flow is divided by the inlet confuser 6 and the separator 5 into two streams — wall and axial. The inhibitor is mixed with the near-wall flow in chamber 2. In chamber 4, a transition to a laminar flow occurs. The wall and axial flows after chamber 4, aligned with the confuser 6 in speeds, continue to move in parallel. I il. Q S (L

Description

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The invention relates to devices for injecting chemicals into the flow of fluid with a laminar flow and can be applied, for example, in protecting pipelines from internal corrosion.

The purpose of the invention is the expansion of technological capabilities due to the possibility of introducing the inhibitor, regardless of its density and flow.

The proposed device allows reducing the consumption of chemical reagent, since the chemical reagent does not mix with the entire flow of fluid, but only with the near-wall one, which makes it possible to protect the internal walls of the pipeline against corrosion during laminar fluid flow. For this, the fluid flow is separated by an inlet confuser and a tubular separator into two streams (wall and axial). A perimeter perforated perpendicularly inlet chamber with a variable section mixing chamber makes it possible to mix the introduced chemical with the near-wall fluid flow due to differential pressure and velocity. The presence of an outlet chamber with rectilinear walls contributes to the establishment of a laminar flow mixed with a chemical reagent near-wall fluid flow. This is also facilitated by the installation of an inlet confuser separator, which allows equalizing the velocities of the near-wall and axial flows after the outlet chamber. The location of the perforation of the mixing chamber on the fluid inlet side enhances the mixing, i.e. promotes better mixing, reducing the consumption of chemicals.

The drawing schematically shows the device, a longitudinal section.

The device consists of an inlet chamber 1 installed coaxially with the chamber of the wall layer 2 with a variable cross-section with perforation 3 located along the perimeter and the outlet chamber 4. In the chambers 2 and 4 the tubular separator 5 with the inlet confuser 6 is installed, which is located in the inlet chamber 1 and obra

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with its walls along the perimeter, slit 7.. Perforation 3 is covered by the receiving chamber 8 of the inhibitor with the pipe 9, the input. The confuser 6 with a tubular separator 5 is attached to the chambers 1 and 4 by means of the kerchiefs 10 and 11.

The device works as follows.

The chemical agent through pipe 9 is fed into the receiving chamber of the inhibitor 8, from where through perforation 3 under pressure enters the chamber of the wall layer 2, where it meets with the near-wall fluid flow separated from the total fluid flow by the inlet confuser 6 passing through the slot 7. intensive mixing of the near-wall liquid with the chemical agent, caused by the pressure drop, speed and turbulence during expansion and contraction of chamber 2. After that, the mixture of chemical agent and the near-wall flow enters the outlet chamber, where the the transition to laminar flow. The near-wall and axial flows aligned with the confuser 6 along the speeds after the outlet chamber 4 continue to move in parallel.

Claims (1)

Invention Formula A device for inserting an inhibitor into the pipeline, which contains an inlet nozzle and a device for forming a near-wall layer with a separator, characterized in that, in order to expand the technological capabilities of the device by allowing the chemical agent to be supplied regardless of the density of the inhibitor and the flow being transported, it is provided with a chamber receiving the inhibitor, and the equipment for forming the near-wall layer contains successively located chamber for entering the flow and the chamber of the near-wall layer, and the separator has confuser part located coaxially to the flow inlet chamber, and cylindrical, located coaxially to the chamber of the near-wall layer, the latter being provided with perforations enclosed by the inhibitor receiving chamber.