SU1427004A1 - Apparatus for introducing deemulsifier into oil flow - Google Patents

Abstract

The invention relates to petrochemistry, in particular, devices for injecting a demulsifier into an oil stream, which can be used for dehydrating and desalting oil. The goal is to increase the degree of mixing of the demulsifier with the oil and reduce the hydraulic resistance. The device includes a pipeline section with a wraparound body coaxially fixed in it, which is designed as a cone, with an increase in diameter in the direction of flow, and with a nozzle-distributor, which is built into the aft part of the wrapping body and provided with a tangential inlet, spiral directions and ring the outlet. The device allows oil to be supplied with a residual moisture content of 0.7 Mac.Z at a specific consumption of a demulsifier of 27 g / m and a decrease in the flow pressure of 0.05 kgf / cm (against 1.5 wt.%; 32 g / m kgf /cm). 1 il. and with

Description

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The invention relates to the design of devices for injecting a deem oil into an oil stream during dehydration and desalting of oil.

The aim of the invention is to increase the degree of reduction of the oil demulsifier and decrease the hydraulic resistance.

Fig.1 is a diagram of the device; figure 2 - section aa in figure 1.

The device consists of a pipeline section 1 connected to an oil pipeline, with a flow body 2 coaxially fixed in it and a spray nozzle 3 built in the stern of the flow body. The nozzle is equipped with a tangential inlet 4 for supplying the reagent, spiral-shaped flow guides 5 and annular

outlet 6, t

The device works as follows.

The flow of oil emulsion in the pipeline 1 flows through the body 2 of the flow. At the same time, due to a decrease in the flow area between the pipe 1 and the flow body 2, the flow velocity increases and the pressure is increased. Behind the flow body 2, a vortex formation B is created in the rear part of the body.

Demulsifier through the tangential inlet 4 enters the spray nozzle 3 and through the spiral-shaped flow guide 5, twists and goes out of the opening 6 into the vacuum zone. In the vortex region B in the form of a truncated contour G.

Creating a vacuum zone B in the aft of the body flow and reducing the pressure of water-oil. The emulsions in the vortex formation region B contribute to the creep of the oil emulsion thickness by the continuous continuous flow of the demulsifier. At the same time, the circumferential uniformity of the distribution of de-ehlgatopa is achieved and the initial volume of contact of the demulsifier with the oil emulsion is increased by increasing the depth of flow through the dosage of demulsifier.

These factors increase the uniform distribution of the concentration of the demulsifier in the oil emulsion. This increases the efficiency of the process of demulsification.

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Example 1. In pipeline 1 with a diameter of mm, the flow rate of the oil emulsion is 3 m / s. The fluid pressure in the pipe is P) 6.3 kgf / cm. The maximum diameter of the body around 1) 200 mm. Kinematic viscosity of cSt oil emulsion. The moisture content at the entrance Wj, 8.0 wt.%.

Due to the reduction of the flow area between the pipe 1 and the flow body 2, the flow rate in this area increases to 2 m / s, the pressure decreases to 2.5 kgf / cm. Under these conditions, the vortex formation area B, vacuum, is created in the stern body 2 flow. which is 3 mm water column.

Demulsifier at a pressure of 60 kgf / cm through a tangential inlet. 4 enters the spray nozzle, and, twisting along the guide spiral 5, leaves the opening 6 with a diameter of mm as a surface of a truncated cone into the vortex region, forming

The resulting continuous circumferential flow in the form of a truncated cone with a pressure exceeding 50 kgf / cm penetrates the thickness of the water-in-oil emulsion having a pressure of 2.5 kgf / cm in depth by 50 mm. Thus, a uniform distribution of the demulsifier concentration was achieved by propelling the flow of oil emulsion to a depth of 50 mm in the form of the surface of a truncated cone with a diameter of a small circle mm. This makes it possible to obtain oil with a residual moisture content at an emulsion sludge for 1 hr 22 min at a specific flow rate of the demulsifier g / m. W (0.7 wt.% .. The loss of the emulsion of the oil emulsion flow is 0.05 kgf / cm „

Example 2 (for comparison). Under conditions similar to Example 1, a demulsifier is introduced into the oil emulsion using a known device. This device is a cylindrical tube with a tapered shank mounted along the axis, the movement of oil flow in the pipeline. The blades are installed at the pipe inlet, and the shank is provided with perforations. A reagent spreader is installed inside the pipe. The diameter of the holes in the shank mm, the number of holes.

Due to the inadequate distribution of the demulsifier after losing oil for 1 h 48 min at g / m, the residual moisture content in oil WH was 1 f5 wt.%. Lost giving:. The device in the device was 2 kgf / cm.

Claims (1)

Apparatus of the Invention A device for injecting a demulsifier into the oil flow, including the pipeline section with a coaxially fixed there is a body wrapped around it with a spray nozzle for supplying a demulsifier, characterized in that, in order to increase the degree of mixing of the demulsifier with oil and reduce the hydraulic resistance, the body flowing around is filled in a cone with increasing diameter in the direction of flow and integrated into the aft portion of the body of the flow and provided with a tangential inlet, spiraling guides and annular outlet. / 7 FIG. dezpdl- zamap