CN215403214U - Pressure type multi-stage air-flotation oil-water separation device - Google Patents
Pressure type multi-stage air-flotation oil-water separation device Download PDFInfo
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- CN215403214U CN215403214U CN202120621609.6U CN202120621609U CN215403214U CN 215403214 U CN215403214 U CN 215403214U CN 202120621609 U CN202120621609 U CN 202120621609U CN 215403214 U CN215403214 U CN 215403214U
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Abstract
The utility model provides a pressure type multistage air-flotation oil-water separation device, wherein a gas-water mixing pipeline extends into a tank body, the gas-water mixing pipeline is connected with a reaction cylinder, the top of the reaction cylinder is provided with a water distributor, the upper part of the reaction cylinder is provided with a water inlet rectifying baffle, the middle lower part of the reaction cylinder is provided with a packing plate, the lower part of the reaction cylinder is provided with a water outlet rectifying baffle, the bottom of the reaction cylinder is connected with a water outlet pipeline, the top of the tank body is provided with an oil outlet, and the bottom of the tank body is provided with a drain outlet; has the advantages that: the utility model has modularization, simple and convenient installation, high treatment efficiency, small occupied area and total retention time less than or equal to 1 h; the pressure type can be connected in series in multiple stages and flexibly arranged; the system can directly receive the effluent of the three-phase separator, and is connected with a filtering system in series by utilizing the excess pressure, so that the lifting links are reduced, and the short flow of a well factory is realized; the operation management is convenient, and unattended operation is realized.
Description
Technical Field
The utility model relates to the field of oil-water separation devices, in particular to a pressure type multistage air floatation oil-water separation device.
Background
At present, in the field of oilfield produced water treatment, the most common oil removal technology is gravity settling, but the process occupies a large area and has limited treatment precision. In the air floatation process, the oil droplets are accelerated to float upwards under the action of buoyancy through adhesion of the micro bubbles and the oil droplets, so that the oil removing efficiency can be greatly improved.
No matter the gravity settling or the air flotation device commonly used in the oil field at present works under the normal pressure condition, and the pressure of the water coming from the front end can be discharged after the sewage is treated by the gravity settling or the air flotation, so that the energy waste is caused. The sewage is contacted with the surrounding environment, so that not only is the sewage aerated with oxygen, but also toxic, harmful, flammable and explosive substances in the sewage are emitted into the surrounding environment to cause secondary pollution. If the chloride ion content of produced water of some oil fields is high, the corrosion of subsequent process equipment and pipelines can be aggravated after the water is subjected to oxygen exposure; if the space on the offshore oil platform is narrow, flammable and explosive gas contained in the sewage is emitted to the surrounding environment, and the hidden danger of fire can be increased.
The pressurized oil remover in the domestic market mainly comprises an inclined plate oil remover and a jet flow air flotation oil remover, the inclined plate has low oil removing efficiency, and the inclined plate is easy to damage or block. Compared with the more commonly used dissolved air flotation in the field of oilfield produced water, the jet air flotation has larger bubbles, is difficult to remove emulsified oil with smaller particle size, and has low oil removal efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects of the prior art and provide a pressure type multi-stage air floatation oil-water separation device.
The new technical scheme of the utility model is as follows: a pressure type multistage air-flotation oil-water separation device comprises a tank body, an air-water mixing pipeline, a reaction barrel, a water inlet rectifying baffle, a water outlet rectifying baffle, a filler plate, an oil discharge port, a drain outlet and a water outlet pipeline, wherein the air-water mixing pipeline extends into the tank body and is provided with a water inlet and a dissolved air-water inlet; the top of the tank body is provided with an oil discharge port, and the bottom of the tank body is provided with a sewage discharge port.
The gas in the gas-dissolving water inlet is nitrogen or air.
The water inlet rectifying baffle is a stainless steel plate.
The water outlet rectification baffle is a stainless steel plate.
The filler plate is a plastic plate.
The tank bodies are connected in series by 2-6.
The tank body is a vertical closed container with pressure.
The utility model has the beneficial effects that: the utility model has modularization, simple and convenient installation, high treatment efficiency, small occupied area and total retention time less than or equal to 1 h; the pressure type can be connected in series in multiple stages and flexibly arranged; the system can directly receive the effluent of the three-phase separator, and is connected with a filtering system in series by utilizing the excess pressure, so that the lifting links are reduced, and the short flow of a well factory is realized; the operation management is convenient, and unattended operation is realized.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of a can body.
Wherein: 1. the device comprises a water inlet, a dissolved gas water inlet, a gas-water mixing pipeline, a tank body, an oil discharge port, a water outlet pipeline, a sewage discharge port, a filler plate, a reaction cylinder, a water distributor, a water inlet rectifying baffle, a water outlet rectifying baffle and a water outlet rectifying baffle, wherein the water inlet is 2, the dissolved gas water inlet is 3, the gas-water mixing pipeline is 4, the tank body is 5, the oil discharge port is 6, the water outlet pipeline is 7, the sewage discharge port is 8, the filler plate is 9, the reaction cylinder is 901, the water distributor is 10, the water inlet rectifying baffle is 11.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
A pressure type multi-stage air-float oil-water separation device comprises a tank body 4, a gas-water mixing pipeline 3, a reaction cylinder 9, a water inlet rectifying baffle 10, a water outlet rectifying baffle 11, a packing plate 8, an oil discharge port 5, a sewage discharge port 7 and a water outlet pipeline 6, wherein the gas-water mixing pipeline 3 extends into the tank body 4, a water inlet 1 and a dissolved air water inlet 2 are arranged on the air-water mixing pipeline 3, one end of the air-water mixing pipeline 3 is connected with a reaction cylinder 9, the reaction cylinder 9 is arranged in the tank body 4, a water distributor 901 is arranged at the top of the reaction cylinder 9, the upper part of the reaction cylinder 9 is provided with a water inlet rectification baffle plate 10, the middle lower part of the reaction cylinder 9 is provided with a filler plate 8, the lower part of the reaction cylinder 9 is provided with a water outlet rectification baffle plate 11, the bottom of the reaction cylinder 9 is connected with one end of a water outlet pipeline 6, and the other end of the water outlet pipeline 6 is connected with a water inlet 1 of the other tank body; the top of the tank body 4 is provided with an oil drain port 5, and the bottom of the tank body 4 is provided with a sewage outlet 7.
The gas in the gas-dissolved water inlet 2 is nitrogen or air.
The water inlet rectifying baffle 10 is a stainless steel plate.
The water outlet rectification baffle plate 11 is a stainless steel plate.
The filler plate 8 is a plastic plate.
The tank bodies 4 are connected in series by 2-6.
The tank body 4 is a vertical closed container with pressure.
The front of the tank body is matched with a mixing reaction facility, and the oily sewage, the reverse-phase demulsifier (which can not be added) and the backflow dissolved gas water enter the tank body after mixed reaction through a gas-water mixing pipeline. The reverse demulsifier improves the demulsification effect of the oily sewage, the backflow gas-dissolved water releases micro bubbles, the micro bubbles are combined with oil drops and the demulsifier to form an air floating body with the density far less than that of water, the air floating body quickly floats upwards and is converged to the top of the tank body to form an oil layer, and the oil layer is discharged through an oil discharge port. Sewage downwards passes through the water inlet rectification baffle and the filler plate to generate coalescence reaction, and oil drops are gradually combined to form larger oil drops, so that the oil-water separation effect in the next-stage tank body is improved. And (4) the sewage after primary separation enters the next-stage tank body, and the oil-water separation process is repeated.
All can add the medicine before each grade jar body, add the medicine through the multistage and improve the treatment effect, reduce and add the medicine volume.
The separated floating oil is discharged through an oil discharge port, manual oil discharge can be realized, and an oil-water interface analyzer can be arranged to be interlocked with an automatic valve, so that automatic oil discharge is realized.
The oily sewage generally carries a small amount of silt, and the silt is deposited in the tank body and can influence the oil-water separation efficiency, so a sewage discharge outlet is arranged; the sewage can be discharged manually, and can also be discharged at regular time by arranging an automatic valve.
The air dissolving system of the whole set of device has a bubble screening function, can discharge large bubbles, keeps the particle size of the bubbles in water at 30 mu m, and improves the adhesion effect of the bubbles and oil droplets. The air source adopts nitrogen or air, the whole device is totally closed and is not contacted with the air, and the corrosion enhancement caused by oxygen exposure can be avoided. When nitrogen is adopted, a nitrogen making machine is required to be matched.
The whole device is provided with an automatic control system, so that remote start and stop can be realized; the automatic oil collection and automatic pollution discharge can be realized; the water amount of the dissolved gas can be interlocked with the water inlet flow of the device for automatic adjustment, and can also be remotely adjusted and controlled, so that the optimal treatment effect is ensured; the online detection and real-time remote transmission of production data such as water quantity, pressure, water quality, power consumption and the like can be realized, a data report and an operation curve are automatically generated, and an alarm is automatically given when the data are abnormal; and the running state of the equipment is detected on line, and the fault automatic alarm is given. The device can also be matched with video monitoring facilities and can remotely transmit video signals in real time. The whole set of automatic control system can be connected with a computer through a network and also can be connected with a mobile phone, and an operation manager can realize real-time mastering of operation data and remote regulation and control of the device through the computer or the mobile phone.
The water quality of inlet water of the pressure type multistage air-flotation oil-water separation device is required to have the oil content less than or equal to 2000mg/L, the suspended matter content less than or equal to 500mg/L, the oil removal rate is 90-95%, and the suspended matter removal rate is more than or equal to 90%. The water outlet of the device can be directly used for water injection, and the water outlet of the device can also be further used for water injection of ultra-low permeability oil fields after being treated by a rear end fine treatment facility. The device can also be used as a pretreatment facility for advanced treatment such as sewage recycling treatment.
The sewage containing the polymer heavy oil (the oil content is less than or equal to 500mg/L and the suspended matter content is less than or equal to 200 mg/L) separated by the three-phase separator enters a pressure type multistage air floatation oil-water separation device after being added with a compound reverse demulsifier, the oil content of the effluent is less than or equal to 30mg/L and the suspended matter content is less than or equal to 30 mg/L. The effluent with pressure directly enters a water injection system for water injection to supplement formation energy. The treatment process does not need to be additionally provided with a lifting pump for lifting, the process is short, and the water outlet pressure of the three-phase separator is fully utilized on the premise of ensuring the water quality.
In the treatment process, part of the effluent is dissolved in air by a dissolved air pump and then flows back to the inlet of the air-flotation oil-water separation device and the inlet of the air-flotation buffer tank, and the reflux ratio of the dissolved air water is 20 percent.
The crude oil recovered in the operation process of the treatment device is discharged to an oil receiving tank in a sewage station and finally recovered to a crude oil treatment system.
The sludge discharged by the treatment device enters a built sludge buffer tank in a sewage station and is then used for profile control and reinjection.
According to the process, a small trial test is carried out at the united station, and the processing capacity is 5m for each hour. The quality of the inlet and outlet water of the test device is shown in the following table:
water inlet and outlet water quality meter of test device
| Serial number | Water quality project | Quality of inlet water | Quality of effluent water |
| 1 | Oil content (mg/L) | 427 | 28 |
| 2 | Suspended solids content (mg/L) | 158 | 25 |
| 3 | Median diameter of suspended solid particles (. mu.m) | 6.4 | 3.2 |
Claims (7)
1. The utility model provides a multistage air supporting oil-water separator of pressure type, includes jar body (4), air water mixing pipe way (3), reaction cylinder (9), water inlet rectification baffle (10), play water rectification baffle (11), packing plate (8), oil drain port (5), drain (7) and outlet conduit (6), its characterized in that: the gas-water mixing pipeline (3) extends into the tank body (4), a water inlet (1) and a gas-dissolved water inlet (2) are formed in the gas-water mixing pipeline (3), one end of the gas-water mixing pipeline (3) is connected with the reaction cylinder (9), the reaction cylinder (9) is installed in the tank body (4), a water distributor (901) is arranged at the top of the reaction cylinder (9), a water inlet rectifying baffle (10) is installed at the upper part of the reaction cylinder (9), a packing plate (8) is installed at the middle lower part of the reaction cylinder (9), a water outlet rectifying baffle (11) is installed at the lower part of the reaction cylinder (9), the bottom of the reaction cylinder (9) is connected with one end of the water outlet pipeline (6), and the other end of the water outlet pipeline (6) is connected with the water inlet (1) of the other tank body; the oil tank is characterized in that an oil discharge port (5) is formed in the top of the tank body (4), and a sewage discharge port (7) is formed in the bottom of the tank body (4).
2. The pressure type multi-stage air-float oil-water separation device as claimed in claim 1, wherein: the gas in the gas-dissolved water inlet (2) is nitrogen or air.
3. The pressure type multi-stage air-float oil-water separation device as claimed in claim 1, wherein: the water inlet rectifying baffle (10) is a stainless steel plate.
4. The pressure type multi-stage air-float oil-water separation device as claimed in claim 1, wherein: the effluent rectifying baffle (11) is a stainless steel plate.
5. The pressure type multi-stage air-float oil-water separation device as claimed in claim 1, wherein: the filler plate (8) is a plastic plate.
6. The pressure type multi-stage air-float oil-water separation device as claimed in claim 1, wherein: the tank bodies (4) are connected in series by 2-6.
7. The pressure type multistage air-flotation oil-water separation device as claimed in claim 1 or 6, wherein: the tank body (4) is a vertical closed container with pressure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022944739 | 2020-12-11 | ||
| CN2020229447391 | 2020-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215403214U true CN215403214U (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120621609.6U Active CN215403214U (en) | 2020-12-11 | 2021-03-27 | Pressure type multi-stage air-flotation oil-water separation device |
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| Country | Link |
|---|---|
| CN (1) | CN215403214U (en) |
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2021
- 2021-03-27 CN CN202120621609.6U patent/CN215403214U/en active Active
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