Oil-gas separation device

Abstract

The utility model discloses an oil-gas separation device, relates to the field of oil and gas wells, and realizes efficient separation of oil, gas and water in a mixture through the synergistic effect of a separation tank and a purification bin in combination with rotational flow sedimentation, aeration purification and automatic control. After the mixture enters the separation tank, heavy impurities are settled and discharged under the action of rotational flow, and meanwhile, primary aeration of the oil liquid is completed when gas floats in the water body, so that light impurities in the oil liquid form foams and preferentially enter the purification bin. In the purification bin, the oil liquid is subjected to secondary aeration, the impurities are further removed to form foamy substances, the foamy substances are discharged through a sewage draining exit, and finally sufficient separation and removal of the impurities are achieved. According to the scheme, the treatment process of oil-gas-water three-phase separation is simplified, the separation efficiency and the oil-gas drying effect are improved, the manual operation requirement is reduced, the environmental pollution risk is reduced, the device is particularly suitable for primary treatment of wellhead collection in the field of petroleum and natural gas, and high-quality raw materials are provided for subsequent refining and conveying.

Description

Technical Field

[0001] This invention relates to the field of oil and gas wells, and more particularly to oil and gas separation devices. Background Technology

[0002] In existing technologies, wellhead post-processing units in the oil and gas industry typically require preliminary three-phase separation of oil, gas, and water in mixtures (including mineral oil, wellhead gas, and cracking fluid) to provide quality feedstocks for subsequent refining and transportation. However, traditional units have several shortcomings in terms of separation efficiency, impurity removal, and ease of operation. First, the separation of heavy and light impurities in the mixture often relies on a single sedimentation or dispersion method, resulting in some impurities remaining and affecting the purity of the oil and gas. Second, the aeration effect of the oil is limited, making it difficult for impurities to form an efficient separation state, and the removal of foam impurities is not ideal. Third, water replenishment and drainage in traditional units usually require manual intervention, making it difficult to achieve long-term continuous and stable operation, increasing operating costs and complexity. In addition, insufficient drying of wellhead gas can easily lead to excessively high moisture content, affecting the operational stability of subsequent transportation systems.

[0003] Based on the above problems, there is an urgent need for a device that can achieve efficient separation of oil, gas and water, combining heavy impurity sedimentation and light impurity separation, oil and gas drying, and automated water replenishment and drainage. Summary of the Invention

[0004] The purpose of this invention is to provide an oil-gas separation device to address the problem that the primary treatment of oil and gas well products is not ideal, which increases the burden on subsequent processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an oil-gas separation device, including a separation tank, a purification chamber fixed on the surface of the separation tank, a sealing chamber connected to the top of the separation tank, a motor fixed on the top of the sealing chamber, and fan blades driven by the motor provided on the inner wall of the sealing chamber;

[0006] The inner wall of the separator is fixed with a partition, the surface of the partition has several through holes, and the lower surface of the partition is fixed with a retaining ring.

[0007] The surface of the partition plate is rotatably perforated by a rotating shaft that is fixed to the bottom of the fan blade, and a centrifugal disc is fixedly connected to the bottom end of the rotating shaft.

[0008] The inner wall of the separator is fixed with a retainer, the top of the retainer is connected to a manifold, and the arc-shaped side wall of the separator is connected to a connection port.

[0009] The bottom of the purification bin is communicated with a plurality of flow converging pipes communicated with the bin sealing pipe, the purification bin is communicated with the separation tank through a plurality of L-shaped pipes, and the bottom of the purification bin is provided with a siphon pipe.

[0010] As a further description of the above technical scheme, a second blowdown pipe is further arranged at the bottom of the separation tank, the second blowdown pipe is a tee pipe, and one end of the second blowdown pipe is communicated with a constant water pipe in the shape of an inverted U.

[0011] As a further description of the above technical scheme, the lower surface of the centrifugal disc is arranged in the shape of an arc blade, and the lower surface of the centrifugal disc is attached to and slides on the top end of the backflow pipe.

[0012] As a further description of the above technical scheme, the arc-shaped side wall of the purification bin is provided with a first blowdown opening for discharging dirt, and the upper surface of the purification bin is provided with an air outlet.

[0013] As a further description of the above technical scheme, the side wall of the separation tank is provided with a water replenishing pipe, and the water replenishing pipe is arranged below the clamping cover.

[0014] As a further description of the above technical scheme, the clamping cover is arranged in the shape of a cone, and the flow converging pipe is communicated with the conical top end of the clamping cover.

[0015] As a further description of the above technical scheme, the upper portion of the baffle plate is filled with a dehumidifying filler.

[0016] As described above, due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0017] The mixture is first subjected to cyclonic separation to separate and settle heavier impurities, and the gas is subjected to aeration in the floating oil liquid accumulated on the water surface to settle heavier impurities in the oil liquid into the water body, and lighter impurities are gathered at the top end of the flow converging pipe, so that the lighter impurities can form foam and enter the upper portion of the clamping cover and then enter the purification bin through the L-shaped pipe, and the oil liquid in the purification bin is subjected to secondary aeration to form foam-shaped impurities with sufficient concentration, which are discharged through the first blowdown opening, so that the lighter and heavier impurities in the interior are combined and fully treated and separated.

[0018] At the same time, the present application can realize primary purification by combining cyclonic separation, aeration and secondary aeration after improving fluidity, and can preliminarily dry the oil liquid and wellhead gas, thereby providing better primary raw material treatment effect.

[0019] In addition, the cracking liquid of the present application can replenish the water body loss, the excess water body can be discharged, and the oil liquid cannot be discharged, so that the cracking liquid and the oil liquid are separated, and the device can be continuously operated for a long time without the need for personnel to maintain and replenish the liquid, thereby being convenient to use.

[0020] As can be seen, the scheme realizes efficient separation and purification of oil, gas and water through multi-layer separation and automatic control, and has the functions of automatic liquid discharge, impurity sedimentation and oil and gas drying. The design simplifies the processing flow of the mixture, significantly improves the separation efficiency, reduces the labor cost and the risk of environmental pollution, and is suitable for the primary treatment of wellhead collection in the oil and gas field, thereby providing high-quality raw materials for subsequent refining and transportation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a perspective view of the present application;

[0022] Figure 2 is a perspective view of the present application from another angle;

[0023] Figure 3 is a perspective view of the present application;

[0024] Figure 4 is a perspective view of the present application;

[0025] Figure 5 is a schematic diagram of the purification principle of the present application.

[0026] LEGEND:

[0027] 1, separation tank; 2, purification bin; 3, cover; 4, manifold; 5, partition; 6, through hole; 7, baffle ring; 8, rotating shaft; 9, centrifugal disc; 10, sealing bin; 11, motor; 12, fan blade; 13, manifold; 14, siphon pipe; 15, first blowdown; 16, gas outlet; 17, L-shaped pipe; 18, second blowdown pipe; 19, constant water pipe; 20, butt joint; 21, water supply pipe. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] As shown in Figure 1 - Figure 5 The present application provides an oil and gas separation device, which comprises a separation tank 1, the surface of the separation tank 1 is fixed with a purification bin 2, the top end of the separation tank 1 is communicated with a sealing bin 10, the top of the sealing bin 10 is fixed with a motor 11, and the inner wall of the sealing bin 10 is provided with a fan blade 12 driven by the motor 11.

[0030] The inner wall of the separation tank 1 is fixed with a baffle 5, a plurality of through holes 6 are formed in the surface of the baffle 5, and a blocking ring 7 is fixed to the lower surface of the baffle 5;

[0031] The surface of the baffle 5 is rotatably provided with a rotating shaft 8 fixed to the bottom of the fan blade 12, and the bottom end of the rotating shaft 8 is fixedly connected with a centrifugal disc 9;

[0032] The inner wall of the separation tank 1 is fixed with a clamping cover 3, the top of the clamping cover 3 is communicated with a plurality of manifold pipes 134, and the arc-shaped side wall of the separation tank 1 is communicated with a plurality of docking interfaces 20;

[0033] The bottom of the purification bin 2 is communicated with a plurality of manifold pipes 134 communicated with the sealing bin 10, the purification bin 2 is communicated with the separation tank 1 through a plurality of L-shaped pipes 17, and the bottom of the purification bin 2 is provided with a siphon pipe 14.

[0034] Specifically, as shown in Figure 3 It also includes a second blowdown pipe 18 communicated with the bottom of the separation tank 1, the second blowdown pipe 18 is a three-way pipe, and one end of the second blowdown pipe 18 is communicated with a constant water pipe 19 in the shape of an inverted U.

[0035] By setting the second blowdown pipe 18, the second blowdown pipe 18 can gather and guide out the dirt deposited in the separation tank 1, ensure the cleanliness of the water in the separation tank 1, and when the dirt is discharged downward, the water is in the constant water pipe 19, the constant water pipe 19 and the separation tank 1 form a U-shaped structure, so that the oil liquid cannot enter the other end of the U-shaped pipe, and the right end of the U-shaped pipe is higher, so that the settled impurities cannot reach, so that the water flows out after passing through the U-shaped pipe, so that the water can be discharged and the height of the U-shaped pipe can maintain the water level in the separation tank 1.

[0036] Specifically, as shown in Figure 4 and Figure 5 The lower surface of the centrifugal disc 9 is provided in the shape of an arc-shaped blade, and the lower surface of the centrifugal disc 9 is located at the top end of the return pipe and is in sliding fit.

[0037] The centrifugal disc 9 can apply kinetic energy to the oil liquid overflowing from the top end of the manifold pipe 134 in rotation by the arc-shaped blade of the lower surface when rotating at high speed, so that the overflowing oil liquid is high-speed impacted on the surface of the blocking ring 7 under the kinetic energy of the centrifugal force, which can improve the flowability of the oil liquid in the impact, and facilitate the subsequent secondary aeration process to fully float the light impurities.

[0038] Specifically, as shown in Figure 2 and Figure 4 The arc-shaped side wall of the purification bin 2 is provided with a first blowdown port 15 for dirt discharge, and the upper surface of the purification bin 2 is provided with an air outlet 16.

[0039] By setting the first sewage outlet 15, the oil liquid surface accumulated in the purification bin 2 floats a layer of light impurities with aeration, and the impurities float up with the foam. As the height of the accumulated oil liquid increases to a suitable height, the impurities can gradually be discharged through the first sewage outlet 15, and the oil liquid can be quickly emptied after the oil liquid submerges the siphon pipe 14 to perform the next batch of oil liquid purification treatment.

[0040] Specifically, as shown in Figure 3 The side wall of the separation tank 1 is provided with a water supplement pipe 21, which is located below the cover 3.

[0041] By setting the water supplement pipe 21, water can be supplemented through the water supplement pipe 21 when needed, so that the internal water body can be discharged through the U-shaped pipe. The discharged water body flows back through the water supplement pipe 21, so that it forms a cycle. In this way, the flowability of the internal rotational flow water body can be improved when needed.

[0042] Specifically, as shown in Figure 4 The cover 3 is conical, and the flow collector 134 is connected to the conical top end of the cover 3.

[0043] The cover 3 is conical, which can play a good converging role and can avoid impurities affected by the centrifugal force of the rotational flow from reaching the position of the flow collector 134. In combination with the accumulation of oil liquid in the flow collector 134, the maximization of aeration is realized, and the continuously rising gas fully aerates the oil liquid in the flow collector 134.

[0044] Specifically, as shown in Figure 5 The upper part of the partition plate 5 is filled with dehumidification filler.

[0045] The dehumidification filler can filter and purify the wellhead gas to a certain extent, and can also dry the wellhead gas.

[0046] The constant water pipe 19 and the siphon pipe 14 realize automatic water level adjustment, the cracking liquid can supplement water consumption, and the excess water is automatically discharged, which ensures the continuous and stable operation of the device.

[0047] In use, the mixture (including mineral oil, wellhead gas and cracking liquid) discharged by the tree is injected into the separation tank 1 through the interface 20. The mixture enters the separation tank 1 and drives the water in the separation tank 1 to rotate by its own kinetic energy. The impurities in the cracking liquid (a mixture of water and sand) and water mix and settle in the rotation and are discharged through the second sewage pipe 18. The increasing cracking liquid increases the amount of internal water, and the excess water is discharged through the constant water pipe 19, so that the internal water level is always constant, and the preliminary purification and separation are completed.

[0048] Meanwhile, the mixed gas of the wellhead gas floats in the water body and enters the collecting pipe 134 under the convergence of the cover 3. The water body rotates in a vortex, and oil liquid (mineral oil, etc.) floats on the water body. The oil liquid is exposed to air and the impurities in the oil liquid are settled in the water body as the oil liquid rotates and the gas flows through the oil liquid. The oil liquid gradually increases and reaches the top end of the collecting pipe 134, so that the oil liquid is dispersed at high speed by the centrifugal disc 9 rotating at high speed at the top end of the collecting pipe 134, and the oil liquid is impacted on the inner wall of the baffle ring 7. After the oil liquid is dispersed and the flowability is improved, the oil liquid drips down, and the wellhead gas blows through the dripping oil liquid to dry the oil liquid.

[0049] After the wellhead gas passes through the through hole 6 of the partition plate 5, the wellhead gas is dried under the action of the dehumidifying filler above. At this time, the inlet gas flows upward and is pressurized by the suction provided by the fan blade 12 driven by the motor 11 and enters the collecting pipe 134. The oil liquid with high flowability after impact in the separation tank 1 enters the purification bin 2 through the L-shaped pipe 17. Based on the small amount of oil liquid, the oil liquid in the purification bin 2 gradually accumulates, and the impurities in the accumulated oil liquid are formed into foam and discharged through the first drain 15 by the aeration of the dried wellhead gas pressurized through the collecting pipe 134. When the oil liquid accumulates to a certain amount, the siphon pipe 14 is submerged, so that the siphon pipe 14 discharges all the oil liquid with high flowability, and the next batch of oil liquid accumulation can be automatically performed.

[0050] The wellhead gas after aeration of the accumulated oil liquid can be further dried and discharged through the gas outlet 16.

[0051] The above process realizes the vortex sedimentation of impurities in the water body, the high-speed dispersion of the oil liquid by the centrifugal disc 9, the gas drying by the dehumidifying filler, and the automatic discharge design, which significantly improves the separation efficiency and processing precision. While ensuring the continuity and stability of operation, the manual operation demand is reduced, the influence of impurities and waste liquid on the environment is reduced, and the oil and gas mixture after wellhead collection is particularly suitable for processing, which provides pure oil and gas raw materials and dischargeable waste liquid for downstream storage and refining links.

[0052] The above description is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An oil-gas separation device, comprising a separation tank (1), characterized in that, The separation tank (1) has a purification chamber (2) fixed on its surface. The top of the separation tank (1) is connected to a sealing chamber (10). The top of the sealing chamber (10) is fixed with a motor (11). The inner wall of the sealing chamber (10) is provided with fan blades (12) driven by the motor (11). The inner wall of the separation tank (1) is fixed with a partition (5), and the surface of the partition (5) is provided with several through holes (6). A retaining ring (7) is fixed on the lower surface of the partition (5). The surface of the partition (5) is rotatably perforated by a rotating shaft (8) fixed to the bottom of the fan blade (12), and a centrifugal disc (9) is fixedly connected to the bottom end of the rotating shaft (8); The inner wall of the separation tank (1) is fixed with a retainer (3), the top of the retainer (3) is connected to a manifold (13)(4), and the arc-shaped side wall of the separation tank (1) is connected to a connection port (20). The bottom of the purification chamber (2) is connected to several manifolds (13)(4) that are connected to the sealing chamber (10). The purification chamber (2) is connected to the separation tank (1) through several L-shaped pipes (17). A siphon pipe (14) is installed at the bottom of the purification chamber (2).

2. The oil-gas separation device according to claim 1, characterized in that, It also includes a second drain pipe (18) connected to the bottom of the separator (1), the second drain pipe (18) is a three-way pipe, and one end of the second drain pipe (18) is connected to a constant water pipe (19) in the shape of an inverted U.

3. The oil-gas separation device according to claim 1, characterized in that, The lower surface of the centrifugal disc (9) is arranged in an arc-shaped blade shape, and the lower surface of the centrifugal disc (9) is located at the top of the reflux pipe and slides in contact with it.

4. The oil-gas separation device according to claim 1, characterized in that, The purification chamber (2) has a first drain outlet (15) on its arc-shaped sidewall for discharging dirt, and an air outlet (16) on its upper surface.

5. An oil-gas separation device according to claim 1, characterized in that, The side wall of the separation tank (1) is provided with a water supply pipe (21), which is located below the cover (3).

6. The oil-gas separation device according to claim 1, characterized in that, The card cover (3) is cone-shaped, and the manifold (13) and (4) are connected at the cone-shaped top of the card cover (3).

7. An oil-gas separation device according to claim 1, characterized in that, The partition (5) is filled with dehumidifying filler.

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