Multifunctional oil-gas-water integrated treatment device

Abstract

The utility model relates to the technical field of oil-gas-water treatment equipment, in particular to a multifunctional oil-gas-water integrated treatment device which comprises a heat exchanger and an oil-gas-water separator, a cavity is formed in the oil-gas-water separator, a first partition plate is vertically arranged in the oil-gas-water separator, and a second partition plate is arranged in the first partition plate. A first partition plate is arranged in the cavity and divides the cavity into a first separation cavity and a second separation cavity, a first overflow weir plate is vertically arranged in the first separation cavity and divides the first separation cavity into a free water separation cavity and an emulsified oil cavity, a first notch is formed in the top of the first overflow weir plate, and the free water separation cavity is communicated with the emulsified oil cavity through the first notch; compared with the prior art, according to the technical scheme, the oil-gas-water separator and the multiple cavities are matched for use, combined use of multiple oil-gas-water treatment processes is achieved, the station yard treatment process is simplified, waste heat energy is fully utilized, system energy consumption is reduced, and the oil-gas-water treatment requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of oil, gas and water treatment equipment, in particular to a multifunctional oil, gas and water integrated treatment device. Background Art

[0002] With the continuous development of old oil fields, most of them have entered the high water content development stage. The water content of oil well produced fluid continues to increase, and the water content of some oil wells has reached more than 95%, which has brought huge pressure to the existing gathering and transportation systems and equipment, and caused serious energy consumption.

[0003] In order to ensure the dehydration effect, most of the oil, gas and water mixture processing stations currently use multi-stage treatment processes such as pressure water separation, large tank sedimentation, thermochemical and electro-dehydration for dehydration. However, each treatment process has its advantages and disadvantages, and there are various problems in dehydration. Therefore, there is also a way to combine the above process flows for dehydration. Although they can complement each other's shortcomings and enable the dehydration process to proceed smoothly, the simultaneous use of multiple dehydration methods makes the process flow complicated, the steps more cumbersome, and the energy consumption is higher.

[0004] Therefore, it is necessary to propose a multifunctional oil, gas and water integrated treatment device to ensure smooth dehydration while simplifying the process and reducing energy consumption. Utility Model Content

[0005] The purpose of the utility model is to solve the problems of complex process flow, cumbersome steps and high energy consumption of the existing oil, gas and water treatment methods. In order to simplify the station treatment process, make full use of waste heat energy, reduce system energy consumption and meet the oil, gas and water treatment needs, the utility model proposes a multifunctional oil, gas and water integrated treatment device.

[0006] The technical solution of the utility model is:

[0007] A multifunctional oil-gas-water integrated treatment device comprises a heat exchanger and an oil-gas-water separator, wherein a cavity is provided inside the oil-gas-water separator, a sand collecting bag is installed at the bottom of the oil-gas-water separator, a vertically placed first partition is provided inside the oil-gas-water separator, the first partition separates the cavity into a first separation chamber and a second separation chamber, a vertically placed first overflow weir is provided inside the first separation chamber, the first overflow weir separates the first separation chamber into a free water separation chamber and an emulsified oil chamber, a first notch is provided on the top of the first overflow weir, the free water separation chamber and the emulsified oil chamber are connected through the first notch, and the sand collecting bag is connected to the free water separation chamber;

[0008] A vertically placed second partition is provided in the second separation chamber, and the second partition divides the second separation chamber into a chemical precipitation chamber and an electro-desorption chamber. An opening is provided at the bottom of the second partition, and a liquid distribution pipe is provided inside the electro-desorption chamber, and the liquid distribution pipe is connected with the opening. A liquid baffle plate is provided in the chemical precipitation chamber, and a second notch is provided on the top of the liquid baffle plate. The bottom of the liquid baffle plate is fixedly connected to the bottom of the second partition, and the liquid baffle plate and the second partition form a filtrate tank. The opening is located in the filtrate tank, and the filtrate tank is connected with the chemical precipitation chamber through the second notch.

[0009] Furthermore, an oil chamber is provided at the end of the second separation chamber, a second overflow weir is provided between the oil chamber and the electro-desorption chamber, a third notch is provided at the top of the second overflow weir, and the oil chamber and the electro-desorption chamber are connected through the third notch.

[0010] Furthermore, the oil-gas-water separator is provided with a mixed liquid inlet connected to the free water separation chamber, and a drainage pipe is provided outside the oil-gas-water separator. The bottom of the free water separation chamber, the bottom of the chemical precipitation chamber and the bottom of the electro-desorption chamber are all connected to the drainage pipe.

[0011] Furthermore, a low-water-content oil pipeline is externally connected to the bottom of the emulsified oil chamber, the low-water-content oil pipeline is connected to the inlet of the heat exchanger, and the outlet of the heat exchanger is connected to the chemical precipitation chamber.

[0012] Furthermore, the top of the emulsified oil chamber is connected to a first liquid separation bag, the top of the chemical precipitation chamber is connected to a second liquid separation bag, and the tops of the first liquid separation bag and the second liquid separation bag are connected to an exhaust pipe.

[0013] Furthermore, a gas phase connecting tube is provided on the second liquid separation bag, and the gas phase connecting tube connects the second liquid separation bag with the electro-desorption chamber.

[0014] Furthermore, a transformer is installed on the oil-gas-water separator.

[0015] Furthermore, a purified oil outlet is provided at the bottom of the oil chamber.

[0016] Furthermore, the heat exchanger is a U-tube heat exchanger.

[0017] The utility model discloses a multifunctional oil-gas-water integrated treatment device, which divides the cavity into a first separation chamber and a second separation chamber by arranging a first partition in the oil-free water separation chamber, and a first overflow weir plate in the first separation chamber divides it into a free water separation chamber and an emulsified oil chamber, and a first notch on the first overflow weir plate realizes the communication between the free water separation chamber and the emulsified oil chamber, so that the oil-gas-water mixed liquid is separated from the free water by gravity sedimentation, and a second partition plate arranged in the second separation chamber divides it into a chemical sedimentation chamber and an electro-desorption chamber, a liquid distribution pipe is installed in the electro-desorption chamber, and an opening on the second partition plate is connected to the liquid distribution pipe, so that the mixed liquid in the chemical sedimentation chamber can be It enters the liquid distribution pipe through the opening, thereby facilitating the next step of electrical dehydration process. As for the liquid baffle plate, it plays a role in blocking the water in the chemical sedimentation chamber from entering the liquid distribution pipe. Through the second notch, the mixed liquid at the top of the chemical sedimentation chamber can enter the filtrate tank, and then enter the liquid distribution pipe to achieve electrical dehydration. The sand bag can be used to collect the screened sand and gravel. Compared with the traditional technology, this technical solution uses an oil-gas-water separator and multiple chambers to cooperate with each other, thereby realizing the combined use of multiple oil-gas-water treatment processes, simplifying the station treatment process, making full use of waste heat energy, reducing system energy consumption, and meeting the oil-gas-water treatment needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural reference diagram of the utility model.

[0019] Figure numerals: 1. heat exchanger; 2. oil-gas-water separator; 3. cavity; 4. first partition; 5. first separation chamber; 6. second separation chamber; 7. first overflow weir; 8. first notch; 9. second partition; 10. chemical precipitation chamber; 11. electro-desorption chamber; 12. opening; 13. liquid distribution pipe; 14. liquid baffle; 15. second notch; 16. filtrate trough; 17. oil chamber; 18. second overflow weir; 19. third notch; 20. mixed liquid inlet; 21. drainage pipeline; 22. low water content oil pipeline; 23. first liquid separation bag; 24. second liquid separation bag; 25. exhaust pipeline; 26. gas phase connecting pipe; 27. transformer; 28. sand collecting bag; 31. purified oil outlet; 32. free water separation chamber; 33. emulsified oil chamber. DETAILED DESCRIPTION

[0020] In order to make the technical means, technical features, utility model objectives and technical effects achieved by the utility model easy to understand, the utility model is further explained below with reference to specific illustrations.

[0021] Embodiment 1:

[0022] like Figure 1As shown, this embodiment provides a multifunctional oil-gas-water integrated treatment device, including a heat exchanger 1 and an oil-gas-water separator 2, wherein a cavity 3 is provided inside the oil-gas-water separator 2, a sand collecting bag 28 is installed at the bottom of the oil-gas-water separator 2, a vertically placed first partition 4 is provided inside the oil-gas-water separator 2, the first partition 4 separates the cavity 3 into a first separation chamber 5 and a second separation chamber 6, a vertically placed first overflow weir 7 is provided in the first separation chamber 5, the first overflow weir 7 separates the first separation chamber 5 into a free water separation chamber 32 and an emulsified oil chamber 33, a first notch 8 is provided on the top of the first overflow weir 7, the free water separation chamber 32 and the emulsified oil chamber 33 are connected through the first notch 8, the sand collecting bag 28 is connected to the free water separation chamber 32, and the sand collecting bag 28 can be used to collect screened gravel;

[0023] A second partition plate 9 is vertically arranged in the second separation chamber 6, and the second partition plate 9 divides the second separation chamber 6 into a chemical precipitation chamber 10 and an electro-desorption chamber 11. An opening 12 is arranged at the bottom of the second partition plate 9, and a liquid distribution pipe 13 is arranged inside the electro-desorption chamber 11, and the liquid distribution pipe 13 is communicated with the opening 12. A liquid baffle plate 14 is arranged in the chemical precipitation chamber 10, and a second notch 15 is arranged on the top of the liquid baffle plate 14. The bottom of the liquid baffle plate 14 is welded to the bottom of the second partition plate 9, and the liquid baffle plate 14 and the second partition plate 9 form a filtrate tank 16, and the opening 12 is located in the filtrate tank 16, and the filtrate tank 16 is connected to the chemical precipitation chamber 10 through the second notch 15. The descending chamber 10 is connected, and the mixed liquid in the chemical sedimentation chamber 10 will first enter the filtrate tank 16 through the second notch 15, and then flow into the bottom of the filtrate tank 16, and then enter the liquid distribution pipe 13 through the opening 12, which is convenient for the subsequent electrolytic dehydration. The liquid baffle plate 14 and the second partition plate 9 are welded, and the joint between the two is sealed by means of sealing strips and the like. Similarly, the first partition plate 4, the second partition plate 9, the first overflow weir plate 7 and the second overflow weir plate 18 in the cavity 3 are all sealed with the wall of the oil-gas-water separator 2 to prevent leakage between the chambers.

[0024] Preferably, an oil chamber 17 is provided at the end of the second separation chamber 6, a second overflow weir 18 is provided between the oil chamber 17 and the electro-dehydration chamber 11, a third notch 19 is provided at the top of the second overflow weir 18, the oil chamber 17 and the electro-dehydration chamber 11 are connected through the third notch 19, after electrolytic dehydration in the electro-dehydration chamber 11, the oil at this time has a qualified water content or is dehydrated, and can enter the oil chamber 17 for collection, the oil chamber 17 is arranged on the partition wall of the electro-dehydration chamber 11, the oil chamber 17 and the electro-dehydration chamber 11 are relatively independent through the second overflow weir 18, and the third notch 19 thereon plays a screening role, and only when the oil level in the electro-dehydration chamber 11 reaches the position of the third notch 19, will it pass through the second overflow weir 18 and enter the oil chamber 17 to realize oil collection.

[0025] Preferably, the oil-gas-water separator 2 is provided with a mixed liquid inlet 20 connected to the free water separation chamber 32, and a drainage pipe 21 is provided outside the oil-gas-water separator 2. The bottom of the free water separation chamber 32, the bottom of the chemical precipitation chamber 10 and the bottom of the electro-desorption chamber 11 are all connected to the drainage pipe 21, and the connection method adopts flange bolt connection. The drainage pipe 21 is used to discharge the water separated from each chamber in the oil-gas-water separator 2 to prevent liquid accumulation.

[0026] Preferably, the bottom of the emulsified oil chamber 33 is connected to a low-water oil pipeline 22 through bolts and flanges, the low-water oil pipeline 22 is connected to the inlet of the heat exchanger 1, and the outlet of the heat exchanger 1 is connected to the chemical precipitation chamber 10. The heat exchanger 1 can heat the oil coming out of the emulsified oil chamber 33, thereby meeting the temperature requirements of thermal chemical precipitation dehydration and electric field dehydration.

[0027] Preferably, the top of the emulsified oil chamber 33 is connected to a first liquid separation bag 23, and the top of the chemical sedimentation chamber 10 is connected to a second liquid separation bag 24. The tops of the first liquid separation bag 23 and the second liquid separation bag 24 are connected to an exhaust pipe 25. The first liquid separation bag 23 can separate the natural gas in the gas in the emulsified oil chamber 33 and discharge it from the top, and the second liquid separation bag 24 can separate the natural gas in the gas evaporated in the chemical sedimentation chamber 10 and discharge it from the top. The first liquid separation bag 23 and the second liquid separation bag 24 realize the separation of the natural gas in the chamber on the one hand, and ensure the air pressure balance on the other hand. Preferably, the first liquid separation bag 23 and the second liquid separation bag 24 are also provided with vents for pressure relief.

[0028] Preferably, a gas phase connecting pipe 26 is provided on the second liquid separation bag 24, and the gas phase connecting pipe 26 connects the second liquid separation bag 24 with the electro-desorption chamber 11, and the electro-desorption chamber 11, the oil chamber 17 and the chemical precipitation chamber 10 achieve pressure balance through the gas phase connecting port.

[0029] Preferably, a transformer 27 is installed on the oil-gas-water separator 2 to meet the demand for electric field dehydration.

[0030] Preferably, a purified oil outlet 31 is provided at the bottom of the oil chamber 17 .

[0031] Preferably, the heat exchanger 1 is a U-tube heat exchanger, which realizes heat exchange and temperature increase between low-water crude oil and circulating hot water, and meets the temperature requirements of thermochemical precipitation dehydration and electric field dehydration of crude oil.

[0032] Preferably, the oil-gas-water separator 2 adopts a multi-chamber constant pressure combination, and the first partition 4 adopts a spherical cap head. Under the condition of uneven operating pressure in the two stages, the risk caused by the uneven load on the middle partition is eliminated, which can effectively ensure sufficient processing space for oil and gas separation and ensure the stability of the device's operation when subjected to internal and external pressures and external pressures.

[0033] As a preferred method, in order to increase the fluidity of the fluid in each transport pipeline, a pump body can be installed to achieve the circulation of the fluid. The specific installation location and quantity can be determined by technical personnel in this field according to actual conditions and will not be elaborated in this article.

[0034] During operation, the first partition plate 4 is arranged in the oil-free water separation chamber 32, thereby dividing the cavity 3 into the first separation chamber 5 and the second separation chamber 6. The first overflow weir plate 7 in the first separation chamber 5 divides it into the free water separation chamber 32 and the emulsified oil chamber 33. The first notch 8 on the first overflow weir plate 7 realizes the communication between the free water separation chamber 32 and the emulsified oil chamber 33, so that the oil-gas-water mixed liquid uses gravity sedimentation to separate the free water. The second partition plate 9 arranged in the second separation chamber 6 divides it into the chemical precipitation chamber 10 and the electro-desorption chamber 11. The electro-desorption chamber 11 is equipped with a liquid distribution pipe 13. The opening 12 on the second partition plate 9 is connected with the liquid distribution pipe 13, so that the chemical precipitation chamber 10 The mixed liquid in the chemical precipitation chamber 10 can enter the liquid distribution pipe 13 through the opening 12, thereby facilitating the next step of the electric dehydration process. As for the liquid baffle 14, it plays a role in blocking the water in the chemical precipitation chamber 10 from entering the liquid distribution pipe 13. Through the second notch 15, the mixed liquid located at the top of the chemical precipitation chamber 10 can enter the filtrate tank 16, and then enter the liquid distribution pipe 13 to achieve electric dehydration. Compared with the traditional technology, this technical solution uses an oil-gas-water separator 2 and multiple chambers to cooperate with each other, thereby realizing the combined use of multiple oil-gas-water treatment processes, simplifying the station treatment process, making full use of waste heat energy, reducing system energy consumption, and meeting the oil-gas-water treatment needs.

[0035] The above description is only a preferred embodiment of the utility model, and is not intended to limit the scope of implementation of the utility model. That is, all equivalent changes and modifications made according to the content of the patent application scope of the utility model should belong to the technical scope of the utility model.

Claims

1. A multifunctional oil-gas-water integrated treatment device, comprising a heat exchanger (1) and an oil-gas-water separator (2), wherein a cavity (3) is provided inside the oil-gas-water separator (2), and characterized in that: A sand collecting bag (28) is installed at the bottom of the oil-gas-water separator (2), a vertically placed first partition (4) is provided inside the oil-gas-water separator (2), the first partition (4) divides the cavity (3) into a first separation cavity (5) and a second separation cavity (6), a vertically placed first overflow weir (7) is provided inside the first separation cavity (5), the first overflow weir (7) divides the first separation cavity (5) into a free water separation cavity (32) and an emulsified oil cavity (33), a first notch (8) is provided at the top of the first overflow weir (7), the free water separation cavity (32) and the emulsified oil cavity (33) are connected via the first notch (8), and the sand collecting bag (28) is connected to the free water separation cavity (32); A second partition (9) placed vertically is provided in the second separation chamber (6), and the second partition (9) divides the second separation chamber (6) into a chemical precipitation chamber (10) and an electro-desorption chamber (11). An opening (12) is provided at the bottom of the second partition (9), and a liquid distribution pipe (13) is provided inside the electro-desorption chamber (11), and the liquid distribution pipe (13) is communicated with the opening (12). A liquid baffle plate (14) is provided in the chemical precipitation chamber (10), and a second notch (15) is provided at the top of the liquid baffle plate (14). The bottom of the liquid baffle plate (14) is fixedly connected to the bottom of the second partition (9), and the liquid baffle plate (14) and the second partition (9) enclose a filtrate tank (16), and the opening (12) is located in the filtrate tank (16), and the filtrate tank (16) is communicated with the chemical precipitation chamber (10) through the second notch (15).

2. A multifunctional oil, gas and water integrated treatment device according to claim 1, characterized in that: An oil chamber (17) is provided at the end of the second separation chamber (6); a second overflow weir plate (18) is provided between the oil chamber (17) and the electro-desorption chamber (11); a third notch (19) is provided at the top of the second overflow weir plate (18); and the oil chamber (17) and the electro-desorption chamber (11) are in communication via the third notch (19).

3. The multifunctional oil, gas and water integrated treatment device according to claim 1, characterized in that: The oil-gas-water separator (2) is provided with a mixed liquid inlet (20) which is in communication with the free water separation chamber (32); a drainage pipe (21) is provided outside the oil-gas-water separator (2); and the bottom of the free water separation chamber (32), the bottom of the chemical precipitation chamber (10) and the bottom of the electro-desorption chamber (11) are all in communication with the drainage pipe (21).

4. The multifunctional oil, gas and water integrated treatment device according to claim 1, characterized in that: The bottom of the emulsified oil chamber (33) is externally connected to a low-water-content oil pipeline (22), the low-water-content oil pipeline (22) is in communication with the inlet of the heat exchanger (1), and the outlet of the heat exchanger (1) is in communication with the chemical precipitation chamber (10) via the low-water-content oil pipeline (22).

5. The multifunctional oil, gas and water integrated treatment device according to claim 1, characterized in that: The top of the emulsified oil chamber (33) is connected to a first liquid separation bag (23), the top of the chemical precipitation chamber (10) is connected to a second liquid separation bag (24), and the tops of the first liquid separation bag (23) and the second liquid separation bag (24) are connected to an exhaust pipe (25).

6. The multifunctional oil, gas and water integrated treatment device according to claim 5, characterized in that: The second liquid separation bag (24) is provided with a gas phase communication tube (26), and the gas phase communication tube (26) connects the second liquid separation bag (24) with the electro-desorption chamber (11).

7. The multifunctional oil, gas and water integrated treatment device according to claim 1, characterized in that: A transformer (27) is installed on the oil-gas-water separator (2).

8. The multifunctional oil, gas and water integrated treatment device according to claim 2, characterized in that: The bottom of the oil chamber (17) is provided with a purified oil outlet (31).

9. The multifunctional oil, gas and water integrated treatment device according to claim 4, characterized in that: The heat exchanger (1) is a U-tube heat exchanger.

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