CN215314504U - Sand cleaning device for produced water treatment tank - Google Patents
Sand cleaning device for produced water treatment tank Download PDFInfo
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- CN215314504U CN215314504U CN202121047556.8U CN202121047556U CN215314504U CN 215314504 U CN215314504 U CN 215314504U CN 202121047556 U CN202121047556 U CN 202121047556U CN 215314504 U CN215314504 U CN 215314504U
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Abstract
The utility model provides a sand cleaning device for a produced water treatment tank, which comprises an inclined plane tank bottom plate, a sand accumulation cavity, an auger sand discharging device and a sand washing water pipeline, wherein two ends of the inclined plane tank bottom plate are slightly higher close to one end of a tank wall, and are slightly lower close to one end of the sand accumulation cavity, so that oil sludge sand in the tank has a stable flow direction, a sand inlet is formed in the sand accumulation cavity, so that the oil sludge sand in the tank can conveniently enter the sand accumulation cavity, the sand washing water pipeline is arranged along the upper edge of the high end of the inclined plane tank bottom plate, water enters from the left path and the right path and surrounds the tank wall for a circle, so that oil sludge sand accumulated on the inclined plane tank bottom plate can be effectively washed, and the auger sand discharging device discharges the oil sludge sand in the sand accumulation cavity out of the tank. The sand removal device for the produced water treatment tank greatly reduces the sand removal operation period of the produced water treatment tank, reduces the safety and environmental protection risks, is simple and convenient to operate, greatly reduces the labor intensity of operating personnel, and avoids the harm of toxic and harmful media in the tank to the body and mind of the operating personnel.
Description
Technical Field
The utility model relates to the technical field of sand removal of a treatment tank in an oilfield produced water treatment system, in particular to a sand removal device for a produced water treatment tank.
Background
During the development of oil fields, the produced fluid carries more or less a portion of the sand and impurities. In the treatment process, the silt and impurities are gradually settled and separated from oil water and are mostly accumulated in the produced water treatment tank. The silt and the impurity that accumulate in the treatment tank bottom are constantly increased day by day, have not only occupied partial effective settlement space, also directly influence the produced water simultaneously and subside the treatment effect, have a great deal of adverse factor to the even running of production.
At present, the sand cleaning of a treatment tank in an oilfield produced water treatment system generally adopts an operation mode of manually opening the tank and cleaning sand, firstly, the treatment tank is shut down, a cleaning hole is opened to clean oil sediment in the tank to the outside of the tank, and then the oil sediment is pumped or transported to a treatment plant by a vehicle for treatment. The operation mode has higher safety and environmental protection risks and has larger influence on production. The technology for removing the oil silt in the tank under the normal operation state of the treatment tank is researched, so that the influence of the shutdown sand removal of the treatment tank on production can be avoided, and the risk of safety and environmental protection caused by the tank opening sand removal can be reduced.
In the application No.: chinese patent application CN201810352612.5 relates to a water treatment tank and a water treatment system, and relates to the technical field of water treatment, including a tank body, a mortar pump and a stirring device; the stirring device is positioned in the tank body; the mortar pump is provided with a first liquid outlet and a second liquid outlet which are respectively arranged at two end parts of the mortar pump; the mortar pump is arranged outside the tank body, a drainage pipeline is arranged on the first drainage port, and the first drainage port is communicated with the inner cavity of the tank body through the drainage pipeline; the second liquid outlet is plugged by a plugging piece.
In the application No.: CN 201811571814.5's chinese patent application relates to a sand removal device of airtight fracturing blender jar, and the device includes the air compressor machine at least, airtight fracturing blender jar, pressure supplementing pipeline and sand removal pipeline, and the gas outlet and the pressure supplementing pipeline of air compressor machine, the parallelly connected air inlet of sand removal pipeline are connected, and sand removal pipeline, the parallelly connected sand outlet of pressure supplementing pipeline can be dismantled with the sand inlet that is used for the sand tank car of transportation and be connected, and airtight fracturing blender jar fixed connection is on pressure supplementing pipeline and its bottom is provided with defeated sand mechanism.
In the application No.: CN 201611258181.3's chinese patent application relates to a gravity method handles oil recovery sewage device, its characterized in that: the waste water outlet on the tank wall of the lower half section of the external heat-preservation single well tank is connected with a waste water inlet of the vertical sand-settling degreaser through a pipeline, a sludge discharge port at the bottom of the vertical sand-settling degreaser is connected with a fatlute recovery box through a pipeline, a PP filter element group is arranged in the middle of the vertical sand-settling degreaser, a filter element water outlet of the PP filter element group is connected with gravity filtering equipment through a pipeline, a gas distribution room water outlet at the bottom of the gravity filtering equipment is connected with a water tank water inlet of a water purification safety box through a pipeline, a backwashing port at the bottom of the gravity filtering equipment is connected with a water tank water return port of the water purification safety box through a backflow pipeline, and a small backwashing pump and a large backwashing pump are arranged on the backflow pipeline.
The prior art is greatly different from the utility model, and the technical problem which we want to solve is not solved, so that the utility model discloses a novel produced water treatment tank sand cleaning device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sand removal device for removing internal oily sediment of a produced water treatment tank under the conditions of no production stop and no tank opening.
The object of the utility model can be achieved by the following technical measures: the sand cleaning device for the produced water treatment tank comprises a slope tank bottom plate, a sand accumulation cavity, an auger sand discharging device and a sand washing water pipeline, wherein two ends of the slope tank bottom plate are slightly higher close to one end of a tank wall, and one end of the slope tank bottom plate is slightly lower close to the sand accumulation cavity, so that oil sludge sand in the tank has a stable flow direction, a sand inlet is formed in the sand accumulation cavity, the oil sludge sand in the tank can conveniently enter the sand accumulation cavity, the sand washing water pipeline is arranged along the high end of the slope tank bottom plate, two paths of water are divided into a left path and a right path and surround the tank wall for a circle, so that oil sludge deposited on the slope tank bottom plate can be effectively washed, and the auger sand discharging device discharges the oil sludge in the sand accumulation cavity out of the tank. The packing auger sand discharging device comprises a packing auger and a sand discharging pipeline, wherein the packing auger is arranged in the sand accumulation cavity, the sand discharging pipeline is arranged on the outer side of the packing auger, the front end part of the sand discharging pipeline is open and is in contact with the oil sludge sand in the tank, and the rear end of the sand discharging pipeline is columnar, so that the oil sludge sand continuously enters the sand discharging pipeline in the rotating process of the packing auger until the oil sludge sand is conveyed out of the tank.
The packing auger sand discharge device also comprises a motor and a transmission shaft, wherein the motor is arranged outside the tank and provides power for the rotation of the packing auger; the packing auger is connected with the motor through the transmission shaft, and the transmission shaft is arranged in the sand outlet pipeline.
The packing auger sand discharging device also comprises a bearing, the bearing is arranged at the connecting end of the transmission shaft and the sand outlet pipeline, and the two ends of the bearing are sealed by shaft ends.
This sand device is arranged to auger includes a plurality of augers and gear drive, this gear drive is installed with the connection position design of this transmission shaft to a plurality of augers, installs the driving gear on this transmission shaft, installs driven gear on each auger, and it is rotatory to drive driven gear through this epaxial driving gear of transmission, thereby drives a plurality of auger work.
The auger sand discharge device also comprises a sand outlet, the sand outlet is arranged at the outer part of the sand outlet pipeline tank and is connected with a sand tank truck, and the sand tank truck is transported outside.
The packing auger sand discharging device also comprises a sand outlet control valve which is a control valve of the sand outlet.
The sand outlet pipeline and the sand flushing water pipeline are connected with a cleaning hole sealing cover of the produced water treatment tank in a flange connection mode, namely mounting flanges are mounted on the inner portion and the outer portion of the cleaning hole sealing cover and are respectively connected with the inner portion and the outer portion of the sand outlet pipeline and the inner portion and the outer portion of the sand flushing water pipeline.
The sand removal device of the produced water treatment tank further comprises a sand washing water control valve, wherein the sand washing water control valve is positioned outside the tank, is connected to the sand washing water pipeline and is a control valve of the sand washing water pipeline.
The produced water treatment tank sand removal device changes the original produced water treatment tank sand removal operation mode, greatly reduces the produced water treatment tank sand removal operation period, changes the original 15-20 days sand removal operation period into the sand removal at any time, and achieves the purpose of treating oil silt in the produced water treatment tank along with production. The produced water treatment tank can be used for sand cleaning operation under the normal operation state, so that the influence of long-time tank stopping and sand cleaning on production is avoided. The produced water treatment tank does not need to be stopped and emptied, the treatment capacity of secondary circulating water of the produced water treatment station is reduced, and the treatment load of the produced water treatment station is reduced. The cleaned oil sludge sand is directly loaded and transported outside, so that the safety and environmental protection risks are reduced. Only the sand flushing water outside the tank and the sand outlet control valve are needed to be opened, and the operation is simple and convenient. The cleaning hole is not required to be opened manually to enter the tank for cleaning sand, so that the labor intensity of operating personnel is greatly reduced, and the harm of toxic and harmful media in the tank to the body and mind of the personnel is avoided.
Drawings
FIG. 1 is a block diagram of one embodiment of a produced water treatment tank sand removal device of the present invention;
FIG. 2 is a partial cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
fig. 3 is a schematic structural diagram of an auger sand discharge device in an embodiment of the utility model.
In the figure, 1, a tank wall panel is treated; 2. treating the tank bottom plate; 3. a sand inlet of the sand accumulation cavity; 4. a sand accumulation cavity; 5. water distribution holes of the central cylinder; 6. an oil receiving groove; 7. a water outlet tank; 8. a central barrel water inlet cavity; 9. a central barrel water outlet cavity; 10. a treatment tank outlet line; 11. a process tank oil recovery line; 12. a treatment tank water inlet line; 13. a sand washing water pipeline; 14. a sand production pipeline; 15. a sand flushing water control valve; 16. a sand outlet control valve; 17. a sand flushing water nozzle; 18. a packing auger; 19. a drive shaft; 20, a sand outlet; 21. sealing the shaft end; 22. a variable frequency motor; 23. cleaning the hole sealing cover plate; 24. a bearing; 25. and (4) bearing end covers.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
The produced water treatment tank sand removal device comprises an inclined plane tank bottom plate, a sand accumulation cavity, a packing auger sand discharge device and a sand washing water pipeline; the packing auger sand discharge device is a complete set of device and comprises a packing auger, a sand outlet pipeline, a sand outlet, a transmission shaft and matched power equipment.
The two ends of the inclined plane tank bottom plate are slightly higher near one end of the tank wall and slightly lower near one end of the sand accumulation cavity, so that stable flow direction of oil sludge sand in the tank is ensured.
And a sand inlet is formed in the sand accumulation cavity, so that oil sludge sand in the tank can conveniently enter the sand accumulation cavity.
The sand washing water pipeline is arranged on the high end of the bottom plate of the inclined plane tank, and is divided into two paths of water which enter from left and right and surround the tank wall for a circle, so that the oil silt accumulated on the bottom plate of the tank can be effectively washed.
In the screw conveyer sand discharging device, the screw conveyer is arranged in the sand accumulation cavity, a sand outlet pipeline is arranged on the outer side of the screw conveyer, the front end part of the sand outlet pipeline is open and is contacted with the oil sludge sand in the tank, and the rear end of the sand outlet pipeline is tubular column-shaped, so that the oil sludge sand can continuously enter the sand outlet pipeline in the rotation process of the screw conveyer until the oil sludge sand is conveyed out of the tank. The auger sand discharge device is provided with a variable frequency motor outside the tank to provide power for the rotation of the auger; the auger is connected with the motor through a transmission shaft, and the transmission shaft is arranged in the sand outlet pipeline; a bearing is arranged at the connecting end of the transmission shaft and the sand outlet pipeline, and two ends of the bearing are sealed by shaft ends; the sand outlet is arranged at the outer part of the sand outlet pipeline tank, and a sand tank truck can be connected at the sand outlet and transported outside a loading vehicle.
The sand production pipeline and the sand washing pipeline of the auger sand discharge device are connected with the cleaning hole sealing cover of the produced water treatment tank in a flange connection mode, namely flanges are mounted on the inner side and the outer side of the cleaning hole sealing cover and are respectively connected with the inner part and the outer part of the sand production pipeline and the sand washing pipeline.
The sand removal method for the produced water treatment tank comprises the following specific steps:
step one, connecting the sand outlet with a sand tank truck, sealing the connecting part perfectly without leakage, and opening a sand outlet control valve.
And secondly, starting the motor at a low frequency to drive the packing auger to rotate, wherein the initial rotating speed is not more than 10r/min, and the oil sludge sand accumulated at the bottom of the tank is pushed into a sand outlet pipeline along with part of produced water under the drive of the packing auger.
And step three, observing the water content condition of the sand outlet, and gradually adjusting the rotating speed of the packing auger to a stable rotating speed of 50r/min along with the gradual increase of the water content.
Opening the sand washing water line control valve, and adjusting the sand washing water pressure to be between 0.4 and 0.6 Mpa. At the moment, the oil sludge sand accumulated on the bottom plate of the inclined-plane tank flows to the sand accumulation cavity along the inclined plane of the tank bottom under the action of the sand washing water.
And fifthly, stopping running the variable frequency motor after the sand outlet mouth is observed to have low sand content and clear water quality.
And step six, closing the sand flushing water control valve and the sand outlet control valve, disconnecting the sand outlet from the sand tank truck, and finishing sand removal.
In an embodiment 1 to which the present invention is applied, as shown in fig. 1 and 2, a configuration diagram of a produced water treatment tank sand removal device of the present invention is shown.
The produced water treatment tank sand removal device of the utility model realizes the sand removal operation of the treatment tank under the condition that the produced water treatment tank normally operates, so that the conventional operation state of the produced water treatment tank needs to be determined: running water enters a central cylinder water inlet cavity 8 through a treatment tank water inlet pipeline 12, then enters the treatment tank through a central cylinder water distribution hole 5 for normal sedimentation treatment, and treated produced water enters a central cylinder water outlet cavity 9, then enters a water outlet water tank 7 and is output out of the tank through a treatment tank water outlet pipeline 10; the top floating oil produced in the production process enters the oil collecting tank 6 and is discharged out of the tank through the oil collecting pipeline 11.
In the produced water treatment tank sand removal device, the treatment tank bottom plate 2 is designed to have a slightly higher outer circle and a slightly lower inner circle, one end close to the treatment tank wall plate 1 is slightly higher, one end close to the sand accumulation cavity 4 is slightly lower, and the lowest edge of the treatment tank bottom plate is connected with the outer edge of the sand accumulation cavity 4 in the axial direction; the sand accumulation cavity 4 is provided with a plurality of sand inlets 3 along the periphery of the wall plate 1 of the treatment tank; the sand washing water pipeline 13 is led into the tank from the outside of the tank, the sand washing water pipeline 13 is divided into a left pipeline and a right pipeline along the upper edge of the tank bottom plate 2 so as to increase the washing effect, the outside part of the tank is provided with a control valve 15, and the sand washing water entering the sand washing water pipeline 13 through the control valve 15 enters the tank through a sand washing water nozzle 17. As shown in fig. 3, the packing auger 18 is installed inside the sand accumulation cavity, the shell of the packing auger is a sand outlet pipeline 14, the sand outlet pipeline 14 is divided into an inner part and an outer part, the inner part and the outer part of the inner part are both connected with a cleaning hole sealing cover plate 23 through flanges, the outer part of the sand outlet pipeline is provided with a sand outlet 20, and the sand outlet 20 is provided with a control valve 16; a variable frequency motor 22 is arranged outside the tank and connected with the packing auger 18 through a transmission shaft 19 to provide power for the rotation of the packing auger; the transmission shaft 19 penetrates into the tank from the inside of the sand outlet pipeline 14 and is connected with the auger 18; the transmission shaft 19 is supported and provided with bearings 24 at two ends, and bearing end covers 25 at two sides of the bearings are sealed by shaft end seals 21.
Example 2
Under the condition that the produced water treatment tank keeps normal operation, a sand outlet 20 is connected with a sand tank truck, a sand outlet control valve 16 is opened, a variable frequency motor 22 is started to drive an auger 18 to rotate through a transmission shaft 19, the initial rotating speed is controlled to be about 10r/min, under the action of thrust generated by rotation of the auger 18, oil sludge sand accumulated in a sand accumulation cavity 4 is extruded into a sand outlet pipeline 14, and along with increasing of the oil sludge sand in the sand outlet pipeline 14, the oil sludge sand in the sand outlet pipeline 14 enters the sand tank truck from the sand outlet 20 through the control valve 16. The sand washing water control valve 15 is opened, sand washing water with higher pressure is conveyed into the tank, under the action of water flow scouring, the mobility of oil sludge sand accumulated on the treatment tank bottom plate 2 is increased, because the treatment tank bottom plate 2 is a slope bottom plate, the mobility of the oil sludge sand on the treatment tank bottom plate 2 is increased, the oil sludge sand flows to the sand accumulation cavity 4 along the slope, and continuously enters the sand accumulation cavity 4 through the sand accumulation cavity sand inlet 3 and is continuously conveyed out of the tank through the packing auger 18, so that the purpose of removing the oil sludge sand in the produced water treatment tank is achieved.
Example 3
This embodiment is improved over embodiment 2. Because the produced water treatment tanks are different in production tasks and different in internal structure, part of the produced water treatment tanks are not internally provided with central cylinders. According to this situation, the original central cylinder position is modified to be the central sand accumulation pit, other parts such as the sand washing water pipeline 13 and the auger 18 are the same as those in the embodiment 1, the sand cleaning operation mode and the operation method are the same as those in the embodiment 1, and the description thereof is omitted.
Example 4
The embodiment is improved on the basis of embodiment 2 or embodiment 3, and the difference is the difference of the mounting number of the packing augers. The packing auger arranged in the sand accumulation cavity 4 or the improved sand accumulation pit can be designed and arranged with 1 or more packing augers according to the field condition, if more than 2 packing augers are arranged (including 2 packing augers), a gear transmission mechanism is required to be designed and arranged at the connecting part of the packing auger 18 and the transmission shaft 19, a driving gear is arranged on the transmission shaft 19, a driven gear is arranged on each packing auger, and the driving gear on the transmission shaft 19 drives the driven gear to rotate, thereby driving a plurality of packing augers to work. Other design and operation methods are the same as those in embodiment 1 or embodiment 2, and will not be described again.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
Claims (8)
1. The produced water treatment tank sand cleaning device is characterized by comprising a bevel tank bottom plate, a sand accumulation cavity, an auger sand discharging device and a sand washing water pipeline, wherein two ends of the bevel tank bottom plate are slightly higher close to one end of a tank wall, and are slightly lower close to one end of the sand accumulation cavity so that oil sludge sand in the tank has a stable flow direction, a sand inlet is formed in the sand accumulation cavity so that the oil sludge sand in the tank can conveniently enter the sand accumulation cavity, the sand washing water pipeline is arranged along the upper edge of the bevel tank bottom plate, left and right water inlets are divided and surround the tank wall for a circle so that oil sludge deposited on the bevel tank bottom plate can be effectively washed, the auger sand discharging device discharges the oil sludge in the sand accumulation cavity out of the tank, the auger sand discharging device comprises an auger and a sand discharging pipeline, the auger is arranged in the sand accumulation cavity, the sand discharging pipeline is arranged on the outer side of the auger, and the front end part of the sand discharging pipeline is open, the back end of the packing auger is in a pipe column shape, so that the oil sludge is continuously conveyed into the sand outlet pipeline until the oil sludge is conveyed out of the tank in the rotating process of the packing auger.
2. The produced water treatment tank sand removal device according to claim 1, wherein the auger sand removal device further comprises a motor and a transmission shaft, the motor is arranged outside the tank and provides power for rotation of the auger; the packing auger is connected with the motor through the transmission shaft, and the transmission shaft is arranged in the sand outlet pipeline.
3. The produced water treatment tank sand removal device according to claim 2, wherein the auger sand removal device further comprises a bearing, the bearing is mounted at the connecting end of the transmission shaft and the sand production pipeline, and two ends of the bearing are sealed by shaft ends.
4. The produced water treatment tank sand removal device according to claim 2, wherein the packing auger sand removal device comprises a plurality of packing augers and a gear transmission mechanism, the gear transmission mechanism is designed and installed at the connection part of the packing augers and the transmission shaft, a driving gear is installed on the transmission shaft, a driven gear is installed on each packing auger, and the driving gear on the transmission shaft drives the driven gear to rotate, so that the packing augers are driven to work.
5. The produced water treatment tank sand removal device according to claim 2, wherein the auger sand removal device further comprises a sand outlet, the sand outlet is arranged at the outer part of the sand outlet pipeline tank, and the sand outlet is connected with a sand tank truck and is carried outside the truck.
6. The produced water treatment tank sand removal device of claim 5, wherein the auger sand removal device further comprises a sand outlet control valve, and the sand outlet control valve is a control valve of the sand outlet.
7. The produced water treatment tank sand removal device according to claim 2, wherein the sand production pipeline and the sand washing water pipeline are connected with a cleaning hole sealing cover of the produced water treatment tank in a flange connection mode, namely mounting flanges are mounted on the inner side and the outer side of the cleaning hole sealing cover and are respectively connected with the inner part and the outer part of the sand production pipeline and the inner part and the outer part of the sand washing water pipeline.
8. The produced water treatment tank sand removal device of claim 1, further comprising a sand-washing water control valve located outside the tank, connected to the sand-washing water line, and being a control valve of the sand-washing water line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121047556.8U CN215314504U (en) | 2021-05-17 | 2021-05-17 | Sand cleaning device for produced water treatment tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121047556.8U CN215314504U (en) | 2021-05-17 | 2021-05-17 | Sand cleaning device for produced water treatment tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215314504U true CN215314504U (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121047556.8U Active CN215314504U (en) | 2021-05-17 | 2021-05-17 | Sand cleaning device for produced water treatment tank |
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| Country | Link |
|---|---|
| CN (1) | CN215314504U (en) |
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2021
- 2021-05-17 CN CN202121047556.8U patent/CN215314504U/en active Active
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