CN208193747U - Weak eddy flow viscous crude defoams separator - Google Patents

Abstract

The utility model relates to a crude oil defoaming and separating device, which is a weak swirling heavy oil defoaming separator, which includes a liquid phase tube and a gas phase tube, and a gas phase tube is connected to the upper side of the liquid phase tube, and the outlet end of the gas phase tube and the The outlet ends of the liquid phase tubes are all inclined downward and guide the flow into the inside of the cylinder along the tangential direction of the cylinder; the inside of the cylinder below the liquid phase tube is fixedly installed with a spiral swirl plate that separates the cylinder up and down. The center of the swirl plate is fixedly installed with an air riser that can communicate with the cylinder above the swirl plate and the cylinder below the swirl plate. The utility model has reasonable and compact structure, safe and reliable use, high defoaming and foam breaking efficiency, complete oil and gas separation, effectively improves the measurement accuracy of subsequent measuring instruments, effectively guarantees the safety of subsequent crude oil gathering and transportation pipelines and equipment, and ensures the efficient operation of equipment. Under the premise of effectively prolonging the operation period of the equipment, it is suitable for the metering and separation of foaming crude oil such as heavy oil fire flooding development and CO2 flooding development, and has broad application prospects.

Description

Weak swirl heavy oil defoaming separator

technical field

The utility model relates to a crude oil defoaming and separating device, which is a weak swirling heavy oil defoaming and separating device.

Background technique

With the deepening of gas field development, in the process of oil and gas gathering and transportation, when crude oil undergoes gas-liquid separation in the separator, the gas dissolved in the crude oil will escape due to the pressure drop, and at this time, it contains carboxylic acid, colloid, asphaltenes Crude oil with natural surfactants such as wax will produce a lot of foam, and some foams will not burst after being stable in crude oil for 8 hours. These stable foams cause the following hazards to crude oil gathering and transportation: a) the foam has a strong adsorption capacity and can carry tiny solid impurities, causing the filter to be blocked. A large number of foams easily cause pump cavitation; The increase in volume leads to a decrease in measurement accuracy; c) a large amount of foam in the separator will occupy most of the space in the separator, making the control of the liquid level in the separator more complicated, and the liquid phase is carried in the gas phase, which seriously affects the separation effect and may also cause Damage to downstream compressors and other equipment.

Therefore, in order to ensure more accurate measurement and safe and reliable operation of the system, it is of great significance to remove air bubbles in crude oil. At present, the existing domestic crude oil defoaming design is still in the initial stage of research. Domestic oil well production fluids usually use conventional separators to achieve separation and metering technology, but conventional separators are only suitable for crude oil with low viscosity, low density and small air bubbles. Thin oil. If the crude oil has high viscosity, high density, and large air bubbles, using a conventional oil-gas separator to process crude oil of this quality will result in low separation efficiency, incomplete oil-gas separation, and high gas content in the separator outlet pipeline, resulting in errors in metering instruments large, affecting the safety and efficient operation of crude oil gathering and transportation pipelines and equipment. Therefore, how to improve the efficiency, equipment safety, high-efficiency operation, and accurate measurement of heavy oil production fluid separation equipment in oilfields has become a technical bottleneck problem restricting the development of large-scale high-yield oilfields at home and abroad, and urgently needs breakthroughs and solutions.

Contents of the invention

The utility model provides a weak swirl heavy oil defoaming separator, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of using the existing domestic conventional separators to achieve separation and metering with high viscosity, high density, and air bubbles. Large quantities of crude oil have problems such as low separation efficiency, incomplete oil-gas separation, large errors in metering instruments, and problems affecting the safe and efficient operation of crude oil gathering and transportation pipelines and equipment. It is suitable for the measurement and separation of foaming crude oil such as heavy oil fire flooding development and CO2 flooding development.

The technical scheme of the utility model is realized through the following measures: a weak swirling heavy oil defoaming separator, including a cylinder body and a liquid inlet device; the liquid inlet device includes a liquid phase pipe and a gas phase pipe, and the liquid phase pipe The upper side is connected with a gas phase tube, and the outlet end of the gas phase tube and the liquid phase tube are both inclined downwards to guide the flow into the inside of the cylinder along the tangential direction of the cylinder; The spiral swirl plate is divided up and down by the body. A riser pipe that can connect the cylinder above the swirl plate and the cylinder below the swirl plate is fixedly installed in the center of the swirl plate. The swirl plate corresponds to the fluid in the liquid phase tube. The whereabouts of the swirl plate is the beginning of the swirl plate, the tail of the swirl plate is the end of the swirl plate, and the side of the swirl plate behind the start of the swirl plate in the direction of the fluid is provided with a breaker that can remove the air bubbles in the fluid on the swirl plate Bubble device, the side of the swirl plate at the end of the swirl plate is also provided with a bubble breaking device capable of removing the bubbles in the fluid on the swirl plate, and at least two bubble breaking buffers are arranged up and down in the cylinder below the swirl plate All the foam-breaking buffer plates are relatively dislocated, and one end of all the foam-breaking buffer plates close to the central axis of the cylinder is inclined downward, and the lower end of the cylinder is connected with the oil outlet pipe; The bubble-breaking umbrella plate that separates the cylinder body up and down, the bubble-breaking umbrella plate is umbrella-shaped, and there are bubble-breaking holes on the bubble-breaking umbrella plate, and a wire mesh demister is fixedly installed in the cylinder above the bubble-breaking umbrella plate. An outlet pipe runs through the top of the cylinder above the wire mesh eliminator.

Below is the further optimization or/and improvement to above-mentioned utility model technical scheme:

The above-mentioned weak swirl thick oil defoaming separator also includes an on-site liquid level gauge, and a partition plate capable of separating the bottom of the cylinder up and down is fixedly installed on the bottom of the cylinder below the foam breaking buffer plate. The oil overflow pipe that can communicate with the cylinder body above the partition plate and the cylinder body below the partition plate is also provided with an oil outlet on the partition plate, and the inlet end of the oil outlet pipe passes through the bottom end of the cylinder body and is located under the partition plate The oil outlets are connected, the liquid level gauge tube of the local liquid level gauge is located outside the cylinder, the upper measuring end of the local liquid level gauge penetrates the cylinder above the partition plate, and the lower measuring end of the local liquid level gauge penetrates the dividing plate. The cylinder below the partition.

A water outlet pipe is communicated with the bottom of the cylinder below the partition plate.

The above-mentioned bubble breaking devices are grid plates.

A hand hole is provided on the cylinder body between the foam breaking buffer plate and the partition plate.

A heating coil is fixedly coiled outside the cylinder.

There are also two differential pressure liquid level gauge connecting pipes above and below the cylinder, and a differential pressure liquid level gauge capable of detecting the fluid level in the cylinder is arranged between the two differential pressure liquid level gauge connecting pipes.

The above-mentioned steam connecting pipe is communicated with the top of the barrel.

The utility model has a reasonable and compact structure. By adopting the vertical weak cyclone separation technology and the mechanical defoaming method, the crude oil with high viscosity, high density and large bubble content can be separated and metered to realize a high-efficiency defoaming separator. The reasonable layout of the defoaming structure and the skid-mounted design of equipment integration make the utility model easy to operate, safe and reliable in use, high in defoaming and foam breaking efficiency, and complete oil and gas separation, effectively improving the measurement accuracy of subsequent measuring instruments, and effectively ensuring Subsequent crude oil gathering and transportation pipelines and equipment are safe, and on the premise of ensuring the efficient operation of the equipment, the operating cycle of the equipment can be effectively extended. The utility model is suitable for the measurement and separation of foamed crude oil such as heavy oil fire flooding and CO2 flooding, and has broad application prospects.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model embodiment.

The codes in the drawings are: 1 is the liquid phase pipe, 2 is the gas phase pipe, 3 is the cylinder, 4 is the swirl plate, 5 is the air riser, 6 is the foam breaking buffer plate, 7 is the oil outlet pipe, and 8 is the broken pipe. Umbrella board, 9 is the wire mesh demister, 10 is the air outlet pipe, 11 is the local liquid level gauge, 12 is the partition plate, 13 is the oil overflow pipe, 14 is the water outlet pipe, 15 is the hand hole, 16 is the heating Coil pipe, 17 is a differential pressure liquid level gauge connection, and 18 is a steam connection.

Detailed ways

The utility model is not limited by the following examples, and the specific implementation manner can be determined according to the technical scheme of the utility model and actual conditions.

In this utility model, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout method of the accompanying drawing 1 of the specification, such as: the positional relationship of upper, lower, left, right, etc. is based on the specification It is determined by the layout direction of the attached drawing.

Below in conjunction with embodiment and accompanying drawing, the utility model is further described:

As shown in Figure 1, the weak swirl heavy oil defoaming separator includes a cylinder 3 and a liquid inlet device; the liquid inlet device includes a liquid phase pipe 1 and a gas phase pipe 2, and the upper side of the liquid phase pipe 1 is connected with a gas phase The tube 2, the outlet end of the gas phase tube 2 and the outlet end of the liquid phase tube 1 are all inclined downward and guide the flow into the inside of the cylinder 3 along the tangential direction of the cylinder 3; The spiral swirl plate 4 that separates the cylinder 3 up and down is fixedly installed in the center of the swirl plate 4, and the air riser 5 that can communicate with the cylinder 3 above the swirl plate 4 and the cylinder 3 below the swirl plate 4 is fixed, The whereabouts of the fluid in the liquid phase tube 1 on the swirl plate 4 is the beginning of the swirl plate 4, the tail of the swirl plate 4 is the end of the swirl plate 4, and the swirl plate behind the beginning of the swirl plate 4 that follows the direction of the fluid The upper side of the swirl plate 4 is provided with a bubble breaking device capable of removing air bubbles in the fluid on the swirl plate 4, and the upper side of the swirl plate 4 at the end of the swirl plate 4 is also provided with a breaking device capable of removing air bubbles in the fluid on the swirl plate 4. Bubble device, at least two foam-breaking buffer plates 6 are arranged up and down in the cylinder body 3 below the swirl plate 4, all the bubble-breaking buffer plates 6 are relatively dislocated, and all the foam-breaking buffer plates close to the central axis of the cylinder body 3 6. Both ends are inclined downward, and the lower end of the cylinder 3 is connected with the oil outlet pipe 7; a bubble-breaking umbrella plate 8 capable of separating the cylinder 3 up and down is fixedly installed in the cylinder 3 above the gas phase pipe 2, and the bubble-breaking umbrella The plate 8 is in the shape of an umbrella, and a bubble-breaking hole is opened on the bubble-breaking umbrella plate 8, and a wire mesh demister 9 is fixedly installed in the cylinder body 3 above the bubble-breaking umbrella plate 8, and the cylinder above the wire mesh demister 9 An air outlet pipe 10 runs through the top of the body 3 .

When working, the oilfield production fluid first enters the liquid phase pipe 1 through the inlet of the liquid phase pipe 1, and the liquid phase pipe 1 is a weak swirling flow section. The gas separated from the fluid in the tube 1 enters the gas phase tube 2; both the gas phase tube 2 and the liquid phase tube 1 enter the cylinder 3 tangentially, so that the fluid entering the cylinder 3 rotates along the tangential direction of the cylinder 3, and the fluid falls On the swirl plate 4, continue to spiral downward on the swirl plate 4, so that the fluid can form a certain swirling flow field in the cylinder 3. Although the swirl field is weak, it is still conducive to the separation of gas and liquid. , and can reduce the energy required to form bubbles and effectively suppress the formation of bubbles in the fluid. In addition, the swirl plate 4 is provided with a bubble breaking device, which can break the formed bubbles; the liquid that swirls down falls into the bubble breaking buffer plate 6 , after at least two stages of buffer plates 6, it enters the bottom of the device for gravity settling and defoaming stage. The settling time strictly follows the regulations in the standard. During this process, the unbroken air bubbles will float to the top of the liquid surface due to the density difference. Ensure that the amount of air bubbles under the liquid surface reaches the minimum, and finally the liquid is discharged from the oil outlet pipe 7 through the oil outlet; the overflowing gas after the foam breaks in the settling and defoaming section rises to the bubble breaking umbrella plate 8 through the air riser 5, and passes through the weak swirl section The overflowed gas also rises to the bubble-breaking umbrella plate 8, and the gas that rises to the bubble-breaking umbrella plate 8 passes through the bubble-breaking umbrella plate 8 with broken holes. After the device 9 performs final liquid removal and defoaming, the gas is discharged through the gas outlet pipe 10. The liquid phase and gas phase after defoaming are respectively measured by downstream metering instruments.

The utility model adopts the vertical weak cyclone separation technology and the mechanical defoaming method to realize the high-efficiency defoaming separator for crude oil with high viscosity, high density and large bubble content, and can clean the inside of the cylinder body 3 as required. The reasonable layout of the defoaming structure and the skid-mounted design of equipment integration make the utility model easy to operate, safe and reliable in use, high in defoaming and foam breaking efficiency, and complete oil and gas separation, effectively improving the measurement accuracy of subsequent measuring instruments, and effectively ensuring Subsequent crude oil gathering and transportation pipelines and equipment safety, on the premise of ensuring the efficient operation of the equipment, effectively extend the operating cycle of the equipment. The utility model is applicable to the measurement and separation of foamed crude oil such as heavy oil fire flooding development and CO2 flooding development, and has broad application prospects.

According to actual needs, the above-mentioned weak swirl heavy oil defoaming separator can be further optimized or/and improved:

As shown in Figure 1, the weak swirl thick oil defoaming separator also includes an in-situ liquid level gauge 11, and a bottom of the cylinder 3 below the foam breaking buffer plate 6 is fixedly installed to separate the bottom of the cylinder 3 up and down. Separation plate 12, is provided with on the separation plate 12 the oil overflow pipe 13 that can communicate with the cylinder body 3 above the separation plate 12 and the cylinder body 3 below the separation plate 12, is also provided with the oil outlet on the separation plate 12, The inlet end of the oil outlet pipe 7 passes through the bottom of the cylinder body 3 and is located below the partition plate 12 and communicates with the oil outlet. The liquid level gauge tube of the on-site liquid level gauge 11 is located outside the cylinder body 3. The upper measuring end of the liquid level gauge 11 runs through the cylinder body 3 above the partition plate 12, and the lower measuring end of the local liquid level gauge 11 penetrates the cylinder body 3 below the partition plate 12.

The partition plate 12 separates the bottom of the cylinder body 3 up and down, and the cylinder body 3 below the partition plate 12 is filled with water. Since the oil is light and the water is heavy, the crude oil floats above the water, and the crude oil above the water passes through the oil spill pipe 13 Spilled to the partition plate 12, and then discharged through the oil outlet pipe 7, due to the complex composition of the crude oil, it can effectively prevent the crude oil from entering the lower measuring end of the local liquid level gauge 11 to block the local liquid level gauge 11, which can ensure the safety of the equipment. Normal and efficient operation, effectively prolonging the service life of the equipment.

As shown in FIG. 1 , a water outlet pipe 14 is communicated with the bottom of the cylinder body 3 below the partition plate 12 . The water outlet pipe 14 is provided to facilitate the equipment to discharge the water below the partition plate 12 smoothly when the equipment is overhauled.

According to needs, the bubble breaking device is a grid plate. The grid plate has a wide range of sources, the material is easy to obtain, the installation is convenient and simple, and the foam breaking efficiency is high.

As shown in FIG. 1 , a hand hole 15 is provided on the barrel 3 between the foam breaking buffer plate 6 and the partition plate 12 . Hand hole 15 is set to facilitate the maintenance of the utility model.

As shown in FIG. 1 , a heating coil 16 is fixedly coiled outside the cylinder body 3 . A heating coil 16 is arranged on the outside of the cylinder body 3, which can effectively prevent the tank from congealing in the state of shutting down in winter.

As shown in Figure 1, two differential pressure liquid level gauge connectors 17 are arranged up and down on the cylinder body 3, and between the two differential pressure liquid level gauge connectors 17, there is a device capable of detecting fluid in the cylinder body 3. Liquid level differential pressure gauge. Set the differential pressure liquid level gauge, and the detected data can be uploaded to the remote control terminal.

As shown in FIG. 1 , a steam connecting pipe 18 is connected to the top of the cylinder body 3 . A steam connecting pipe 18 is provided, and when the pressure in the cylinder 3 is relatively low, steam can be used to supplement pressure to the cylinder 3 .

The above technical features constitute the best embodiment of the utility model, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

Claims (10)

1. A weak swirl heavy oil defoaming separator, comprising a cylinder and a liquid inlet device; the liquid inlet device includes a liquid phase pipe and a gas phase pipe, and the upper side of the liquid phase pipe is connected with a gas phase pipe, and the outlet end of the gas phase pipe The outlet end of the liquid phase tube is inclined downward along the tangential direction of the cylinder to guide the flow into the inside of the cylinder; the inside of the cylinder below the liquid phase tube is fixedly installed with a spiral swirl plate that separates the cylinder up and down. In the center of the swirl plate is fixedly installed a riser pipe that can communicate with the cylinder above the swirl plate and the cylinder below the swirl plate. The tail of the plate is the end of the swirl plate, and the side of the swirl plate behind the beginning of the swirl plate in the direction of the fluid is provided with a bubble breaking device that can remove the bubbles in the fluid on the swirl plate, and the swirl plate at the end of the swirl plate The upper side is also provided with a bubble-breaking device capable of removing bubbles in the fluid on the swirl plate. There are at least two bubble-breaking buffer plates arranged up and down in the cylinder below the swirl plate. All the bubble-breaking buffer plates are relatively dislocated. One end of all bubble-breaking buffer plates close to the central axis of the cylinder is inclined downward, and the lower end of the cylinder is connected with an oil outlet pipe; a bubble-breaking umbrella plate that can separate the cylinder up and down is fixedly installed in the cylinder above the gas phase pipe. The bubble-breaking umbrella plate is umbrella-shaped, and there are bubble-breaking holes on the bubble-breaking umbrella plate. A wire mesh demister is fixedly installed in the cylinder above the bubble-breaking umbrella plate. The top of the cylinder above the wire mesh demister is penetrated with a Exit pipe. 2. The weak swirl heavy oil defoaming separator according to claim 1, characterized in that it also includes an in-situ liquid level gauge, and a fixed device is installed at the bottom of the cylinder below the foam breaking buffer plate to move the bottom of the cylinder up and down. The separating plate is provided with an oil overflow pipe that can communicate with the cylinder above the dividing plate and the cylinder below the dividing plate, and an oil outlet is also arranged on the dividing plate, and the inlet end of the oil outlet pipe passes through The bottom end of the cylinder is located under the partition plate and communicates with the oil outlet. The liquid level gauge tube of the local liquid level gauge is located outside the cylinder body, and the upper measuring end of the local liquid level gauge runs through the cylinder above the partition plate. , the lower measuring end of the local liquid level gauge runs through the cylinder below the dividing plate. 3. The weak swirl heavy oil defoaming separator according to claim 2, characterized in that the bottom of the cylinder below the partition plate is connected with a water outlet pipe. 4. The weak swirl thick oil defoaming separator according to claim 1, 2 or 3, characterized in that the foam breaking devices are all grid plates. 5. The weak cyclone heavy oil defoaming separator according to claim 1, 2 or 3, characterized in that a hand hole is provided on the cylinder between the foam breaking buffer plate and the partition plate. 6. The weak cyclone heavy oil defoaming separator according to claim 4, characterized in that a hand hole is provided on the cylinder between the foam breaking buffer plate and the partition plate. 7. The weak swirl heavy oil defoaming separator according to claim 1, 2 or 3, characterized in that a heating coil is fixedly coiled outside the cylinder; or/and, there are also up and down on the cylinder Two differential pressure liquid level gauge joints, a differential pressure liquid level gauge capable of detecting the fluid level in the cylinder is arranged between the two differential pressure liquid level gauge joints; or/and, communicated at the top of the cylinder There is steam taking over. 8. The weak swirl thick oil defoaming separator according to claim 4, characterized in that a heating coil is fixedly coiled outside the cylinder; or/and, there is also a device on the cylinder that can detect A differential pressure liquid level gauge for the fluid level; or/and, a steam connection is connected to the top of the cylinder. 9. The weak cyclone heavy oil defoaming separator according to claim 5, characterized in that a heating coil is fixedly coiled outside the cylinder; or/and, there is also a device on the cylinder that can detect A differential pressure liquid level gauge for the fluid level; or/and, a steam connection is connected to the top of the cylinder. 10. The weak swirl thick oil defoaming separator according to claim 6, characterized in that a heating coil is fixedly coiled outside the cylinder; or/and, there is also a device on the cylinder that can detect A differential pressure liquid level gauge for the fluid level; or/and, a steam connection is connected to the top of the cylinder.