CN220363828U - Automatic oil and water cutting device for crude oil storage tank - Google Patents
Automatic oil and water cutting device for crude oil storage tank Download PDFInfo
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- CN220363828U CN220363828U CN202321750468.3U CN202321750468U CN220363828U CN 220363828 U CN220363828 U CN 220363828U CN 202321750468 U CN202321750468 U CN 202321750468U CN 220363828 U CN220363828 U CN 220363828U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 197
- 238000005520 cutting process Methods 0.000 title claims abstract description 151
- 239000003921 oil Substances 0.000 title claims abstract description 68
- 238000003860 storage Methods 0.000 title claims abstract description 35
- 239000010779 crude oil Substances 0.000 title claims abstract description 33
- 230000007306 turnover Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The utility model discloses an automatic oil and water cutting device for a crude oil storage tank, which comprises a water outlet valve group and a control system, wherein the water outlet valve group and the control system are arranged at a water outlet, the water outlet is connected with a water cutting inlet pipeline and an original water cutting pipeline, and the water cutting inlet pipeline and the original water cutting pipeline are respectively provided with a water cutting device inlet valve and an original water cutting pipeline inlet valve; the water cutting inlet pipeline is connected with a water cutting tank, the water cutting tank is connected with an input end of a turnover pump through a pipeline, the input end of the turnover pump is connected with a turnover pneumatic valve, and the output end of the turnover pump is connected with a turnover tank. The storage tank equipment is a siphon type drainage pipeline, so that automatic oil return control is realized, and manual intervention is not needed; the water cutting device can work under any environmental condition (windy, rainy, severe cold, summer, daytime and night), continuously cuts water, has high water cutting speed and reduces the residence time of crude oil in the tank; the water cutting equipment has simple site construction and short installation and debugging period.
Description
Technical Field
The utility model relates to the technical field of petrochemical industry, in particular to an automatic oil and water cutting device for a crude oil storage tank.
Background
In the daily operation of tank farm in petrochemical industry, the water cutting of tank farm oil tank is an essential important work. The crude oil can inevitably carry water in the processes of exploitation, transportation and loading and unloading, and the water in the medium needs to be discharged periodically so as to meet the production requirement; in the oil refining process, the finished oil can be inevitably watered due to the processing technology, and the finished oil can be delivered for sale after being cut off.
In recent years, the water cutting of the light oil storage tank in the tank farm of petrochemical enterprises is basically realized by automatic operation, but crude oil has the specificity, and the water cutting of the crude oil storage tank in the tank farm is mainly finished by manpower at present; the labor intensity of manual water cutting is high, toxic gas brought by water cutting can cause certain injury to human bodies, special personnel are required to take care when the water is cut manually, and people know that the water is discharged cleanly when seeing the medium, so that the environment is polluted to a certain extent, the sewage purification cost is increased, and certain safety risk exists if the water is inflammable and explosive medium; the reliability of the oil tank water cutting is completely established on the responsibility of operators, and the requirements of environmental protection and safe discharge in the petrochemical industry at present are not met; along with the continuous progress of the technology, an automatic crude oil water cutting device with reliable operation is urgently needed to reduce the labor intensity of workers and avoid the harm of toxic and harmful gases to human bodies, so that the demand of the automatic crude oil water cutting device is accelerated.
Disclosure of Invention
The utility model aims to provide an automatic oil and water cutting device for a crude oil storage tank, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the automatic oil and water cutting device for the crude oil storage tank comprises a water outlet valve group and a control system which are arranged at the water outlet, wherein the water outlet is connected with a water cutting inlet pipeline and a raw water cutting pipeline, and the water cutting inlet pipeline and the raw water cutting pipeline are respectively provided with a water cutting device inlet valve and a raw water cutting pipeline inlet valve;
the water cutting inlet pipeline is connected with a water cutting tank, the water cutting tank is connected with the input end of a turnover pump through a pipeline, the input end of the turnover pump is connected with a turnover pneumatic valve, and the output end of the turnover pump is connected with a turnover tank;
the turnover tank is connected with the water cutting tank through a pipeline, an oil return manual gate valve and an oil return pneumatic valve are arranged on the pipeline between the turnover tank and the water cutting tank, and a high-limit manual gate valve and a low-limit manual gate valve are respectively arranged on outlet pipelines at the high position and the low position of the turnover tank.
Preferably, a liquid level controller and a thermometer sender are arranged on the turnover tank.
Preferably, the low-level outlet pipeline of the water cutting tank is connected with an original water cutting pipeline, and the low-level outlet pipeline of the water cutting tank is provided with a water cutting outlet pneumatic switch valve and an electromagnetic flowmeter.
Preferably, the control system consists of a detection instrument, a PLC and an electrical control part.
Preferably, an oil-water identification sensor is arranged on the water cutting tank.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the explosion-proof standard design of the existing petrochemical industry, automation is realized, water in oil is automatically cut, zero emission of effective media is realized, only water is discharged without discharging oil, and water cutting work is independently completed;
2. the storage tank equipment is a siphon type drainage pipeline, so that automatic oil return control is realized, and manual intervention is not needed;
3. the water cutting device can work under any environmental condition (windy, rainy, severe cold, summer, daytime and night), continuously cuts water, has high water cutting speed and reduces the residence time of crude oil in the tank;
4. the water cutting equipment has simple site construction and short installation and debugging period.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a control flow diagram of the present utility model;
FIG. 3 is a flow chart of the oil detected by the present utility model;
FIG. 4 is a logic diagram of the automatic water cut control for detection according to the present utility model.
In the figure: 1. a water outlet valve group; 2. an inlet valve of the water cutting device; 3. an inlet valve of an original water cutting pipeline; 4. a water cutting outlet pneumatic switch valve; 5. an electromagnetic flowmeter; 6. cutting a water tank; 7. oil return manual gate valve; 8. an oil return pneumatic valve; 9. a turnover pneumatic valve; 10. a transfer pump; 11. a turnover tank; 12. a liquid level controller; 13. a thermometer feeder; 14. high limit manual gate valve; 15. low limit manual gate valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-4, the present utility model provides a technical solution: the automatic oil and water cutting device for the crude oil storage tank comprises a water outlet valve group 1 and a control system which are arranged at a water outlet, wherein the water outlet is connected with a water cutting inlet pipeline and a raw water cutting pipeline, and the water cutting inlet pipeline and the raw water cutting pipeline are respectively provided with a water cutting device inlet valve 2 and a raw water cutting pipeline inlet valve 3;
the water cutting inlet pipeline is connected with a water cutting tank 6, the water cutting tank 6 is connected with the input end of a turnover pump 10 through a pipeline, the input end of the turnover pump 10 is connected with a turnover pneumatic valve 9, and the output end of the turnover pump 10 is connected with a turnover tank 11;
the turnover tank 11 is connected with the water cutting tank 6 through a pipeline, an oil return manual gate valve 7 and an oil return pneumatic valve 8 are arranged on the pipeline between the turnover tank 11 and the water cutting tank 6, and a high-limit manual gate valve 14 and a low-limit manual gate valve 15 are respectively arranged on the outlet pipelines at the high position and the low position of the turnover tank 11.
In the utility model, a liquid level controller 12 and a thermometer transmitter 13 are arranged on a turnover tank 11.
In the utility model, a low-level outlet pipeline of the water cutting tank 6 is connected with an original water cutting pipeline, and a water cutting outlet pneumatic switch valve 4 and an electromagnetic flowmeter 5 are arranged on the low-level outlet pipeline of the water cutting tank 6.
In the utility model, the control system consists of a detection instrument, a PLC and an electrical control part.
In the utility model, an oil-water identification sensor is arranged on the water cutting tank 6.
The working principle of the utility model is as follows: the automatic water cutting of the crude oil storage tank in the tank farm needs to work for a long time, effectively and stably, and the following two actual problems in the field must be solved:
(1) The sensor is contaminated to affect the measurement accuracy; the viscosity, corrosion and other characteristics of the crude oil medium to be measured have great influence on the measurement accuracy of the sensor; the oil-water identification detection sensor is polluted by a medium, the detection precision is changed along with the pollution, and serious accidents such as valve misoperation and oil leakage are easily caused; in the water cutting system, the detection sensor adopts advanced technologies such as matrix type micro-capacitance radio frequency inspection treatment and medium temperature compensation, impurities and oil sludge in the water cutting tank can be discharged together with water in the water cutting process, and the impurities and the oil sludge can not be deposited in the water cutting device, so that the problem that the sensor is polluted is solved.
(2) Oil return problem; the form of a water cutting port of an oil medium storage tank in a tank area is divided into two types: a direct-discharge water cutting port and a siphon water cutting port; the oil energy original path of the direct-discharge type water cutting port entering the water cutting device returns to the oil tank. For the storage tank adopting the siphon water cutting pipe, the deposited water in the storage tank can not be discharged again, and the automatic water cutting skid-mounted equipment utilizes the turnover tank to push a small amount of oil product remained in the water cutting pipe or the water cutting tank back into the storage tank, so that the oil return problem is solved.
The control system of the automatic oil and water cutting device of the crude oil storage tank consists of a detection instrument, a PLC and an electrical control part, the device needs to be heated in winter in the northern cold environment to prevent oil from condensing, the dehydration effect is influenced, when the device is heated, the temperature needs to be controlled, after water cutting is finished, the bottom of the water cutting tank is water, the upper part is oil, a steam pipe is used for heating the water, when the temperature is too high, boiling water can generate steam, steam is stripped on the upper part of the oil, all light components are taken away, and the rest heavy components can form more oil sludge, even coke; the temperature is too high, crystalline salt is easily generated at the bottom of the water cutting tank, and when no steam exists on site, the water cutting tank can be heated by an electric tracing mode, and if the tank area has hot water with the temperature of about 90 ℃ on site, the water cutting tank is most suitable to be heated by the hot water.
The lift of the turnover oil return pump in the automatic oil and water cutting device of the crude oil storage tank is selected according to the atmospheric pressure converted from the height of the crude oil storage tank and the pressure converted from the pipeline caliber, the length and the like between the water cutting port of the storage tank and the water cutting skid-mounted device of the water cutting skid-mounted device, and the lift pressure of the turnover pump is 1.3 times greater than the sum of the two pressures, so that the turnover pump is beneficial to conveying the medium in the oil return tank back to the crude oil storage tank through the water cutting tank. Meanwhile, the turnover pump is installed on the prying body to be subjected to noise prevention treatment, so that the noise of the whole water cutting prying device is controlled below 80 dB.
The control system of the automatic oil and water cutting device for the crude oil storage tank is provided with an explosion-proof touch display screen, the working state of water cutting can be directly observed on site, the water cutting process, all instrument operation parameters and the flow state of water cutting can be visually displayed, the working parameters can be directly adjusted by a remote controller on site, full automation is realized by water cutting, manual intervention is not needed after the system is operated, and water cutting work is completed according to a preset program.
Automatic water cut control logic: for a direct-discharge water cutting port, a sensor arranged at the upper part of a water cutting tank judges that the medium flowing into the storage tank is water, the set sedimentation time is up, a PLC sends a signal to drive a pneumatic water cutting valve to open, and the system starts to cut water; in the water cutting process, if the sensor detects that the oil is or the set maximum water cutting time is reached, the water cutting system sends a signal to drive the pneumatic water cutting valve to be closed, the system stops cutting water, and the water cutting process is completed; the automatic water cutting control logic is shown in figure 4; the oil flow is detected as shown in fig. 3.
For the siphon water cutting port, the skid body is additionally provided with a turnover tank, and oil products entering a dewatering pipeline and a secondary water cutting tank in the water cutting process are returned to the crude oil storage tank by controlling the turnover pump. In order to maintain the air pressure balance in the turnover tank, ensure that the storage tank is not damaged when in overpressure or vacuum, reduce the medium loss in the tank, and the upper part of the turnover tank is provided with a fire-retarding breather valve.
After the sensor detects oil and stops dewatering, an oil return system is started, the oil at the upper part of the dewatering device and at an oil return opening in the siphon pipe is stored in the oil return system, and water in the crude oil storage tank enters the water cutting tank again and water cutting begins; the water cutting tank sensor detects oil again, dewatering is stopped, oil stored in the oil return system is firstly pumped back to the crude oil storage tank, the oil return system is emptied, oil in the upper part of the water cutting tank and the siphon pipe is stored in the oil return system, water in the oil tank enters the water cutting tank again, water cutting is started again, after the oil return system is started, water is not detected, the fact that the water in the crude oil storage tank is completely removed is indicated, then the circulating pump is controlled to start the oil return system once every 2 hours (the time can be set according to the actual condition of the site or the system is self-set), and whether the water exists in the crude oil storage tank is checked.
The control system of the on-site automatic water cutting skid-mounted device exchanges data with the monitoring system of the tank farm centralized control center through RS 485. The operator can remotely monitor the water cutting condition of the site, can remotely control the on-off of the water cutting valve, and can adjust various parameters and operation modes at any time according to the needs. When the water cutting valve, the water cutting PLC control system, the sensor, the communication, the power failure and the like have faults, the background monitoring system can give an alarm in time to remind operators to process in time.
The automatic oil and water cutting device of the crude oil storage tank is provided with an electromagnetic flowmeter at a water outlet, the accumulated water cutting flow is sent to a background computer monitoring system, and valuable information of more crude oil production management can be obtained through computer software to data analysis and calculation.
Two sensors are arranged on the upper portion of the water cutting tank, a two-out-of-two safety control mode is adopted, the water cutting valve is opened only when the two sensors detect water, the water cutting valve is immediately closed when any one sensor detects that the oil content in the water exceeds the standard, the water cutting skid-mounted device is safe in faults, the valve is closed when any fault system stops cutting water, and an alarm prompt is given, so that safe and reliable operation of the system is guaranteed.
While embodiments of the present utility model have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations may be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. Automatic oil and water cutting device for crude oil storage tanks, and is characterized in that: the water outlet valve group (1) and the control system are arranged at the water outlet, the water outlet is connected with a water cutting inlet pipeline and an original water cutting pipeline, and a water cutting device inlet valve (2) and an original water cutting pipeline inlet valve (3) are respectively arranged on the water cutting inlet pipeline and the original water cutting pipeline;
the water cutting inlet pipeline is connected with a water cutting tank (6), the water cutting tank (6) is connected with the input end of a turnover pump (10) through a pipeline, the input end of the turnover pump (10) is connected with a turnover pneumatic valve (9), and the output end of the turnover pump (10) is connected with a turnover tank (11);
the turnover tank (11) is connected with the water cutting tank (6) through a pipeline, an oil return manual gate valve (7) and an oil return pneumatic valve (8) are arranged on the pipeline between the turnover tank (11) and the water cutting tank (6), and a high-limit manual gate valve (14) and a low-limit manual gate valve (15) are respectively arranged on outlet pipelines at the high position and the low position of the turnover tank (11).
2. The automatic oil and water cutting device for a crude oil storage tank according to claim 1, wherein: the turnover tank (11) is provided with a liquid level controller (12) and a thermometer feeder (13).
3. The automatic oil and water cutting device for a crude oil storage tank according to claim 1, wherein: the low-position outlet pipeline of the water cutting tank (6) is connected with an original water cutting pipeline, and the low-position outlet pipeline of the water cutting tank (6) is provided with a water cutting outlet pneumatic switch valve (4) and an electromagnetic flowmeter (5).
4. The automatic oil and water cutting device for a crude oil storage tank according to claim 1, wherein: the control system consists of a detection instrument, a PLC and an electrical control part.
5. The automatic oil and water cutting device for a crude oil storage tank according to claim 1, wherein: an oil-water identification sensor is arranged on the water cutting tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321750468.3U CN220363828U (en) | 2023-07-05 | 2023-07-05 | Automatic oil and water cutting device for crude oil storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321750468.3U CN220363828U (en) | 2023-07-05 | 2023-07-05 | Automatic oil and water cutting device for crude oil storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220363828U true CN220363828U (en) | 2024-01-19 |
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ID=89512994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321750468.3U Active CN220363828U (en) | 2023-07-05 | 2023-07-05 | Automatic oil and water cutting device for crude oil storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220363828U (en) |
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2023
- 2023-07-05 CN CN202321750468.3U patent/CN220363828U/en active Active
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