Tanks for separation of the emulsion

 

The invention relates to the oil industry, in particular to installations for the collection and preparation of oil and water, and can be used to separate emulsions. The sump includes a vertical cylindrical container, the dispenser of the emulsion in the form of a horizontal pipe and set arranged in series one behind the other axial side of hollow truncated cones, rigidly fixed to each other and with the pipe and having inner diameters and angles, decreasing as the distance from the butt end of the pipe. Last bump is a full cone. On the connection of the input of the emulsion on the top mounted vertical exhaust pipe, the upper end of which is located in the gas zone of the clarifier. The technical result consists in reducing the cost of manufacture, installation and maintenance of the sump. In addition, the quality of separation of the emulsion. 4 Il., table 2.

The proposal relates to the oil industry, in particular to installations for the collection and preparation of oil and water, and can be used to separate emulsions.

Known reservoir-Otto sii and collections divided oil, water and gas. Moreover, the dispenser emulsion made in the form of perforated tubes arranged in a horizontal plane across the cross section of the reservoir tank and running the rays from the center of the reservoir tank to the periphery (radial perforated liquor). [Latushkin the hydrographic Collection and preparation of oil, gas and water. - M.: Nedra, 1979, page 257, Fig.100].

Known tank-sump allows for dehydration of oil and primary cleaning formation water due to the processes of coalescence of droplets emulsified phase and gravity separation. Used in the dispenser of the emulsion sufficiently well performs the function of uniform distribution of the emulsion on the cross-section of the vessel, thereby reducing the flow rate of the emulsion to the values practically do not impede the flow of process sludge. These tanks septic tanks are widely used in the oil industry.

The disadvantage of this tank-sump design is the complexity, the greater intensity and complexity of installation of the distributor of the emulsion, and the complexity of the work on periodic maintenance of the reservoir tank and the cleaning tank bottom tank from cuttings. In addition, the overall flow of the emulsion in resease and oil in the aqueous phase). The collections of the separated phases of the oil and water are closer to the individual structural elements of the dispenser of the emulsion, and for part of the flow the residence time of the emulsion, and hence the time of its sludge is insufficient for the complete separation of the phases, as part of the flow of nerazdelennaya emulsion flows through the shortest path from input to output. In addition, coming from the oil fields to prepare the emulsion contains oil, water and dissolved gas. When the movement of the emulsion on the inlet pipeline is released from the emulsion of this dissolved gas. The gas separated in the inlet line from the emulsion, also uniformly distributed across the horizontal cross section of the reservoir tank and at its high content prevents the separation process of the emulsion due to bubbling of the gas through the emulsion layer and the interface oil-water, which leads to a sharp deterioration in the quality of oil.

The closest in technical essence and the achieved result to the present invention is settling tank for separation of the emulsion, comprising a vertical cylindrical container, a V-shaped dispenser emulsion with attached bilateral perforated distributing combs and sordidlittle emulsion in the form of two beams of pipes, located at the wall of the tank and the collectors of the separated phases at the opposite wall of the sump. This design is less bulky and easier to install, and creates less interference with maintenance of the sump. General flow of emulsion from input to outputs products does not prevent sludge process. The gas released from the emulsion in the supply line, the design of the distributor emulsion provides sparging only through part of the cross section of the tank and creates less of a hindrance to the process of sludge. A more rational organization of the flow of the emulsion can improve the quality of oil and water produced at the outlet of the settling tank, or for the same quality products and the same dimensions of the sump to increase its performance.

The disadvantages of this tank are the design complexity and the large intensity of the distributor of the emulsion, and the lack of quality of oil and water produced at the outlet of the sump. This is because when using the described dispenser emulsion internal volume of the tank is used inefficiently due to misallocation of flow of the emulsion. In addition, emulsion, partially delaminated on phase p is remesiana phases at the input of the tank and subsequent bubbling of the gas through the emulsion layer in the front part of the cross section of the sump.

The technical challenge is to simplify the design, the efficiency of the separation process of the emulsion by changing the direction and nature of the flow in the sump and the exception re-emulsification of the divided phases when the bubbling of the spin-off in the supply pipeline gas through the emulsion layer.

This object is achieved by the proposed clarifier for separation of emulsions, comprising a vertical cylindrical container, the dispenser emulsion, collections of separated phases, located at the opposite from the distributor of the emulsion to the vessel wall.

What's new is that the distributor of the emulsion is made in the form of a horizontal pipe input emulsions and set arranged in series one behind the other coaxial connector input emulsion chisels-guides representing installed with a gap relative to each other and connection of the input of the emulsion hollow truncated cones, rigidly fixed to each other and with the connection of the input of the emulsion, and having inner diameters and angles, decreasing as the distance from the butt end of the pipe entering the emulsion, and the last bump-guide is a complete konpo top mounted vertical exhaust pipe, the upper end of which is located in the gas area of the sump.

In the known sources of scientific-technical and patent literature, there is no similar set of essential features. Not identified technical solutions that have the signs consistent with the distinctive features of the proposed solution. Thus, we can conclude that the proposed solution meets the patentability requirements of novelty and inventive step.

In Fig.1 shows a General view of a settling tank for separation of the emulsion.

In Fig.2 shows a General view of the distributor of the emulsion.

In Fig.3 shows the dispenser of the emulsion in terms of indicating the flow of emulsion.

In Fig.4 shows the dispenser emulsion clarifier - vertical steel tank (VST) - 1000.

Tanks for separation of the emulsion consists of a vertical cylindrical tank 1, collections of oil 2, water 3 and strip 4 and the inlet pipe 5, the distributor emulsion 6 inside the tank and located at the opposite from the collections of oil, water and gas to the vessel wall (Fig.1). The dispenser emulsion 6 is coaxially of the inlet pipe 5 and consists of a pipe entering the emulsion 7, chippers-nepalii (Fig.2).

Tanks for separation of the emulsion is as follows.

On the inlet pipe 5, the emulsion flows through the dispenser emulsion 6 in a vertical cylindrical container 1. When the movement of the emulsion on the inlet pipe is pre-stratification on free gas, emulsion and free water. This free gas and free water are moving in the supply line, respectively, along the upper and lower forming. When applying emulsion in the dispenser emulsion free gas, located at the top of the inlet pipe, is given in the top 12 (gas) zone capacity on the exhaust pipe 11 is installed inside the sump at the top of the horizontal pipe input emulsion 7, and the main stream of the emulsion without free gas enters the lower portion of the tank into the zone of separation of the phases of oil and water, with opposite from the collections of the oil 2 and water 3 the vessel wall. Collections of oil and water are located in the oil zone 13 and the water zone 15. The vertical flue pipe is required to prevent re-mixing the separated oil from entering the sump emulsion PR is tion task, the flow of the emulsion, coming into the tank through the dispenser emulsion is broken by the rumble strips-guides 8 and 9 into n equal to the sectional area of parts (n is the number of baffles directing the dispenser emulsion) and sent in different directions (Fig.3). The rumble strips-guides 8 and 9 are coaxially to the connection of the input of the emulsion 5 and rigidly fixed on it by means of the coupling elements 15. The rumble strips-guides 8 are arranged sequentially one after another hollow truncated cones with different angles. The tops of the truncated cones are directed in the direction of pipe entry emulsion, the diameter of the larger base of all truncated cones 8 are equal and should be 5% larger than the inner diameter of the pipe entering the emulsion 5. The angles truncated cones and the diameter of the smaller base (bore holes) each of the following truncated cone is proportionately reduced as the distance from the butt end of the pipe entering the emulsion in such a way that each of the truncated cones cuts 1/n is the sectional area of flow of the emulsion. The rumble strips-guides 8 are not attached to each other, and are arranged with a gap that is visible in the horizontal projection. In addition, the distance between the large osnovaniya and a smaller base subsequent truncated cone must be equal to F/(·n·d1), where d1the diameter of the smaller base of the subsequent truncated cone, F is the cross-sectional area of the pipe entering the emulsion, depending on the volume and performance of the clarifier. In addition, recent bumpers-guide 9 is a full cone, the vertex of which is directed toward the connection of the input of the emulsion and is located at a distance equal to F/(·n·d2), from the smaller base of the previous truncated cone, where d2the diameter of the smaller base of the previous truncated cone. The last guide dampens the energy of the Central jet flow of the emulsion, diluting the thread at hand. The gap between the rumble strips-guide set, so that they do not create a tight flow, and extinguish and send in the thickness of the emulsion is almost free flowing stream.

The movement of the emulsion in the proposed sump is a United front throughout the volume of the sump without stagnant zones, which promotes a more efficient use of the internal volume of the tank. In addition, the location of the distributor of the emulsion in the tank on the side opposite to the collections of separated phases, contributes to the fact that the path of potocols increases, consequently, the quality at the outlet of the sump separated phases increases. Thus, the application of the proposed clarifier improves the efficiency of the separation process of the emulsion.

The design of the distributor emulsion compared with the known dispensers are less bulky, easier to manufacture and installation. Furthermore, the design of the distributor emulsion does not preclude the maintenance of the sump and cleaning the bottom of the tank from cuttings.

An example of a specific implementation.

Conducted laboratory studies to determine the optimal design of a settling tank for separation of emulsions showed that the proposed design of the sump is the most effective.

The essence of the experiments was as follows. Emulsion pump was applied in the model tank. Used in experiments emulsion has a density of=1000 kg/m3and viscosity=1 MPa·C. as a model of the settling tank was used capacity height 350 mm, 300 mm in diameter and displacement of 20 liters. The model tank was equipped with a dispenser of the emulsion and collections of separated phases.and a height of 40 mm and 300 mm from the bottom of the model sump, the opposite from the distributor of the emulsion to the vessel wall. When establishing the stationary mode of feeding the emulsion into the model of the tank is 20 l/h, which corresponds to the hard mode of operation of a clarifier model before settling into the flow of the emulsion was injected dye. The introduction of dye into the stream enables visual monitoring of the distribution and direction of flow of the emulsion in the model sump and the determination of the moment of occurrence of the first portions of the dye on the output from the model sedimentation tank through the collectors are separated phases, i.e., the response time when using different designs of the distributor emulsion.

When experiments were investigated several designs of tank, including analog, prototype and proposed settling tank for separation of the emulsion. While the proposed tank was equipped with a dispenser of the emulsion, consisting of the horizontal pipe input emulsions, three contiguous to each other coaxially to the pipe entering the emulsion chisels-rails and vertical flue pipe. The diameter of the pipe entering the emulsion is 15 mm. Boots-guides are installed and with the connection of the input of the emulsion. The first two bumpers are hollow truncated cones with internal diameters and angles, decreasing as the distance from the butt end of the pipe entering the emulsion. Their internal diameters are equal respectively 12.2 mm and 8.7 mm, outer diameters equal of 15.75 mm, and the angles - 120° to 90°. The first bump-guide is located at a distance of 4.6 mm from nozzle entry emulsion, the second bumpers-guide is located at a distance of 3.2 mm from the first and third bump-guide is positioned so that the top of the cone is at a distance of 2.15 mm from the smaller base of the previous bumpers-guide. Last bump-guide is a complete cone with a height of 7 mm, with an angle of 45°. In addition, the top of the cone directed toward the connection of the input of the emulsion.

Since the efficiency of the separation process of the emulsion significantly affects the residence time of the emulsion in the tank (the time of sludge), to select the optimum design of the tank was determined by the response time and the change with time of the concentration of dye in the emulsion at the outlet of the model of the tank is measured by a photometer KLF-3. The result of the experiments are given in tablica for the proposed maximum sump, consequently, the residence time of the emulsion in the tank, i.e. the time of sludge will be maximum. Experience of plant operations and laboratory studies of the process of separation of the emulsion and in particular the process of separating oil-water emulsions show that ceteris paribus, the more time sludge, the higher the quality of the separated phases.

To compare the quality at the outlet of the sump separated phases using different distributors emulsion experiments were conducted. As the emulsion prepared was applied in the laboratory mixture consisting of transformer oil water content of 40%. From the gas cylinder into the prepared emulsion before the model tank was supplied to the carbon dioxide in a volume of 1 m3/m3.

In our experiments, we used the prototype and the proposed clarifier for separation of the emulsion, and the proposed clarifier for separation of the emulsion supplied by the distributor of the emulsion was tested using the gas exhaust pipe, and without it. In our experiments, we determined the quality of the separated phases at the outlet of the sump. The experimental results are presented in table 2.

In Fig.4 presents the main dimensions of the distributor emulsion installed in the settling tank for separation of the emulsion PBC-1000 used in the oil fields for the separation of emulsions.

We offer tanks for separation of the emulsion gives the possibility of reducing the cost of manufacture, installation and maintenance of the sump. It also improves the quality of the emulsion separation in 20-35%, which ultimately leads to improving the efficiency of the separation process of the emulsion.

Claims

Tanks for separation of the emulsion, comprising a vertical cylindrical container, the dispenser emulsion, collections of separated phases, located at the opposite from the distributor emulsion of the vessel wall, characterized in that the dispenser emulsion is made in the form of a horizontal pipe input emulsions and set arranged in series one behind the other coaxial connector input emulsion chisels-guides representing installed with a gap relative to each other and connection of the input of the emulsion hollow try and angles, decreasing as the distance from the butt end of the pipe entering the emulsion, and the last bump-guide is a full cone, with the vertex of the cone directed toward the connection of the input of the emulsion, while the connection of the input of the emulsion on the top mounted vertical exhaust pipe, the upper end of which is located in the gas area of the sump.



 

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