Gas-liquid mixed transportation integrated device and process thereof

Abstract

The invention belongs to the technical field of gas-liquid mixed transportation integration, and discloses a gas-liquid mixed transportation integration device and a process thereof.The gas-liquid mixed transportation integration device comprises a liquid storage tank, a first washing tank, a second washing tank, a first compressor and a second compressor, an inlet of the liquid storage tank is connected with a mixed liquid inlet, and an outlet of the liquid storage tank is connected with inlets of the first washing tank and the second washing tank through pipelines; a first compressor is arranged on a pipeline between the gas outlet in the top of the first washing tank and the gas inlet in the bottom of the second washing tank, a second compressor is arranged on a pipeline between the gas outlet in the top of the second washing tank and the gas inlet in the bottom of the first washing tank, and mixed liquid outlets are connected to the bottoms of the first washing tank and the second washing tank; according to the gas-liquid mixed transportation system, continuous gas-liquid mixed transportation is conducted through cooperation of the two washing tanks and the compressor, the gas-liquid mixed transportation efficiency is improved, meanwhile, liquid can be automatically returned into the liquid storage tank and redistributed, and the safety, efficiency and yield of gas-liquid mixed transportation are improved.

Description

Technical Field

[0001] This invention belongs to the field of gas-liquid mixed transport integration technology, specifically relating to a gas-liquid mixed transport integration device and its process. Background Technology

[0002] With the development of oil and gas fields and the advancement of supporting technologies for oil and gas gathering and transportation, multiphase mixed transportation technology for oil, gas, and water has been increasingly widely applied. Pressurizing low-pressure oil and gas media extracted from wellheads and then transporting them through pipelines is currently the most effective way to transport oil and gas over long distances with high efficiency, yielding significant social and economic benefits.

[0003] In existing technologies, oil-gas-water multiphase mixed transportation technology uses a compressor to pressurize the separated gas. The pressurized high-pressure gas medium is then discharged into a storage tank and then into the mixed transportation pipeline network. The compressor has a low displacement, which cannot meet the actual needs on site and has low efficiency. At the same time, since it involves multiple components such as oil, gas and water, the distribution and flow characteristics of these components are very complex, resulting in poor stability during pressurized transportation. This may lead to excessive pressure inside the tank and even safety accidents. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated gas-liquid mixing and transportation device and its process, which can perform continuous gas-liquid mixing and transportation and improve the efficiency of gas-liquid mixing and transportation.

[0005] The technical solution adopted in this invention is a gas-liquid mixing and conveying integrated device, which is set between the mixing inlet and the mixing outlet. It includes a storage tank, a first washing tank, a second washing tank, a first compressor, and a second compressor. The inlet of the storage tank is connected to the mixing inlet. The outlet of the storage tank is connected to the inlets of the first washing tank and the second washing tank respectively. The first compressor is installed on the pipe between the gas outlet at the top of the first washing tank and the gas inlet at the bottom of the second washing tank. The second compressor is installed on the pipe between the gas outlet at the top of the second washing tank and the gas inlet at the bottom of the first washing tank. The bottoms of both the first washing tank and the second washing tank are connected to the mixing outlet.

[0006] Preferably, a first pressure regulating valve is installed at the top of the first washing tank, and a second pressure regulating valve is installed at the top of the second washing tank. The first and second pressure regulating valves are connected to the upper end of the storage tank through an external pipeline.

[0007] Preferably, a first intake valve is installed on the pipe connecting the first washing tank and the first compressor, and a first exhaust valve is installed on the pipe connecting the first compressor and the second washing tank.

[0008] Preferably, a second intake valve is installed on the pipe connecting the second washing tank and the second compressor, and a second exhaust valve is installed on the pipe connecting the second compressor and the first washing tank.

[0009] Preferably, liquid level sensors are installed in the first washing tank and the second washing tank respectively.

[0010] Preferably, a first inlet valve is installed on the pipe connecting the storage tank and the first washing tank, and a second inlet valve is installed on the pipe connecting the storage tank and the second washing tank.

[0011] Preferably, a first drain valve is installed on the pipe connecting the first washing tank to the mixing outlet, and a second drain valve is installed on the pipe connecting the second washing tank to the mixing outlet.

[0012] Preferably, the system further includes a filter disposed between the inlet of the storage tank and the mixing inlet.

[0013] This invention also provides an integrated gas-liquid mixing and transport process, comprising the following steps: S1: Construct a gas-liquid mixed transport station; S2: Establish a computer control system within the constructed gas-liquid mixing station; S3: After pretreatment, the water entering the gas field is introduced into the storage tank; S4: The liquid in the storage tank is transferred to the first washing tank and the second washing tank respectively for gas-liquid separation; S5: Compress the gas in the first washing tank and send it into the second washing tank, and compress the gas in the second washing tank and send it into the first washing tank. S6: When the hydraulic pressure in the first and second washing tanks exceeds the standard in S5, reverse the liquid to reduce the pressure, and then redistribute the liquid into the first and second washing tanks. S7: Repeat steps S3-S6 to continue gas-liquid mixing.

[0014] Furthermore, in step S2, the computer control system is used to centrally monitor, control, and schedule the production process of the gas-liquid mixing station.

[0015] The beneficial effects of this invention are as follows: The gas-liquid mixing and conveying integrated device and its process of the present invention continuously mixes and conveys gas and liquid through the cooperation of two sets of washing tanks and compressors, which improves the efficiency of gas-liquid mixing and conveying. At the same time, when the pressure in the washing tank is too high, it can automatically back into the storage tank and redistribute the liquid. During the depressurization process, it can continuously carry out gas-liquid mixing and conveying, which not only can quickly depressurize, but also ensure the efficiency of gas-liquid mixing and conveying, and avoid leakage, thereby improving the safety, efficiency and output of gas-liquid mixing and conveying.

[0016] The invention features a compact device that optimizes the operation of oil, gas, and water mixed transport pipelines, reducing construction costs and improving transport efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the gas-liquid mixing and transporting integrated device of the present invention.

[0018] The attached figures are labeled as follows: 1. Filter; 2. Storage tank; 3. First washing tank; 4. Second washing tank; 5. First compressor; 6. Second compressor; 7. First liquid level sensor; 8. Second liquid level sensor; 9. First inlet valve; 10. Second inlet valve; 11. First air inlet valve; 12. First exhaust valve; 13. Second air inlet valve; 14. Second exhaust valve; 15. First drain valve; 16. Second drain valve; 17. First pressure regulating valve; 18. Second pressure regulating valve. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 like Figure 1 As shown, the gas-liquid mixing and conveying integrated device of the present invention is disposed between the mixing inlet and the mixing outlet, including a storage tank 2, a first washing tank 3, a second washing tank 4, a first compressor 5, and a second compressor 6. The inlet of the storage tank 2 is connected to the mixing inlet, and the outlet of the storage tank 2 is respectively connected to the inlets of the first washing tank 3 and the second washing tank 4. The first compressor 5 is disposed on the pipe between the gas outlet at the top of the first washing tank 3 and the gas inlet at the bottom of the second washing tank 4, and the second compressor 6 is disposed on the pipe between the gas outlet at the top of the second washing tank 4 and the gas inlet at the bottom of the first washing tank 3. The bottoms of both the first washing tank 3 and the second washing tank 4 are connected to the mixing outlet.

[0021] Example 2 Based on Example 1, such as Figure 1 As shown, in this embodiment, a filter 1 is also included, which is disposed between the inlet of the storage tank 2 and the mixing inlet A.

[0022] The first washing tank 3 and the second washing tank 4 are respectively equipped with a first liquid level sensor 7 and a second liquid level sensor 8.

[0023] In this embodiment and in other embodiments, the connections between the filter 1, the liquid storage tank 2, the first washing tank 3, the second washing tank 4, the first compressor 5, and the second compressor 6 are all pipe connections.

[0024] In practice, gas field water is fed into filter 1 through the mixing inlet A, filtered, and then stored in storage tank 2. Storage tank 2 then distributes the water to the first washing tank 3 and the second washing tank 4. Gas-liquid separation occurs in the first and second washing tanks 3 and 4. The gas separated in the first washing tank 3 is compressed by the first compressor 5 and discharged into the second washing tank 4 for gas-liquid mixing. The gas is then output from the mixing outlet B. Simultaneously, the gas separated in the second washing tank 4 is compressed by the second compressor 6 and discharged into the first washing tank 3 for gas-liquid mixing. The gas is then output from the mixing outlet B.

[0025] Example 3 In this embodiment, a first pressure regulating valve 17 is installed at the top of the first washing tank 3, and a second pressure regulating valve 18 is installed at the top of the second washing tank 4. The first pressure regulating valve 17 and the second pressure regulating valve 18 are connected to the upper end of the liquid storage tank 2 through an external pipeline.

[0026] In practice, when the pressure in the first washing tank 3 or the second washing tank 4 is too high, the first pressure regulating valve 17 and the second pressure regulating valve 18 installed at the top of the first washing tank 3 and the second washing tank 4 respectively can be opened to release pressure, and the gas or liquid released from the pressure will flow back into the storage tank 2 for redistribution. This not only releases pressure but also avoids leakage and waste, thereby improving the safety of gas-liquid mixed transportation and ensuring production.

[0027] A first intake valve 11 is installed on the pipe connecting the first washing tank 3 and the first compressor 5. A first exhaust valve 12 is installed on the pipe connecting the first compressor 5 and the second washing tank 4. A second intake valve 13 is installed on the pipe connecting the second washing tank 4 and the second compressor 6. A second exhaust valve 14 is installed on the pipe connecting the second compressor 6 and the first washing tank 3.

[0028] In specific implementation, the first intake valve 11 is used to control the opening and closing of the gas separated from the first washing tank 3, and the second intake valve 13 is used to control the opening and closing of the gas separated from the second washing tank 4. Thus, when one intake valve is open, one compressor runs, and when both intake valves and two exhaust valves are open at the same time, the first compressor 5 and the second compressor 6 run synchronously. This allows for appropriate adjustments based on the water supply from the gas field, thereby reducing energy consumption. At the same time, it can be used to adjust the pressure difference generated inside the two washing tanks.

[0029] A first inlet valve 9 is installed on the pipe connecting the storage tank 2 and the first washing tank 3. A second inlet valve 10 is installed on the pipe connecting the storage tank 2 and the second washing tank 4. A first drain valve 15 is installed on the pipe connecting the first washing tank 3 and the mixed liquid outlet B. A second drain valve 16 is installed on the pipe connecting the second washing tank 4 and the mixed liquid outlet B.

[0030] In specific implementation, the supply of treated gas field water to the first washing tank 3 and the second washing tank 4 is controlled by the first inlet valve 9 and the second inlet valve 10 respectively, so that the pressure in the first washing tank 3 and the second washing tank 4 can be automatically adjusted to avoid leakage due to excessive pressure. The first drain valve 15 and the second drain valve 16 are set for rapid pressure relief adjustment of a single washing tank.

[0031] Example 4 This embodiment provides an integrated gas-liquid mixing and transportation process, which specifically includes the following steps: A station will be constructed near the gas field, either near the gas field or within the natural gas processing plant. This station will include facilities such as storage tank 2 and pipelines to meet the centralized treatment and transportation needs of the gas field water. A computer control system will be established within the constructed station. Gas field water entering through the mixed-liquid inlet A will undergo pretreatment via filter 1 before being introduced into storage tank 2. By opening the first inlet valve 9 and the second inlet valve 10, the water from storage tank 2 will be transported to the first washing tank 3 and the second washing tank 4 for gas-liquid separation. Simultaneously, the first gas inlet valve will be opened... Valve 11, first exhaust valve 12, second intake valve 13, second exhaust valve 14, first drain valve 15, and second drain valve 16 are used to compress the gas separated in the first washing tank 3 and discharge it into the second washing tank 4 for gas-liquid mixing. Then, the gas is output from the mixed liquid outlet B. At the same time, the gas separated in the second washing tank 4 is compressed by the second compressor 6 and discharged into the first washing tank 3 for gas-liquid mixing. Then, the gas is output from the mixed liquid outlet B. This achieves the highest efficiency continuous gas-liquid mixing and transportation under stable pressure.

[0032] Example 5 This embodiment provides an integrated gas-liquid mixing and transportation process, the process steps of which are as follows: A station will be constructed near the gas field, either near the gas field or within the natural gas processing plant. This station will include facilities such as storage tank 2 and pipelines to meet the centralized treatment and transportation needs of the gas field water. A computer control system will be established within the constructed station. Gas field water entering through the mixed-liquid inlet A will be pre-treated by filter 1 and then fed into storage tank 2. By opening the first inlet valve 9 and the second inlet valve 10, the water in storage tank 2 will be transported to the first washing tank 3 and the second washing tank 4 for gas-liquid separation. If the gas pressure in the first washing tank 3 becomes too high, it will be detected by the first liquid level sensor 7. When the liquid level continues to rise, the first pressure regulating valve 17 will automatically open, discharging the water from the first washing tank 3. Water from the gas field is returned to the storage tank 2. At the same time, the first inlet valve 9 is closed, and the first air inlet valve 11, the first exhaust valve 12, the second air inlet valve 13, the second exhaust valve 14, the first drain valve 15, and the second drain valve 16 are opened. The gas separated in the first washing tank 3 is compressed by the first compressor 5 and discharged into the second washing tank 4 for gas-liquid mixing, and then output from the mixed liquid outlet B. Simultaneously, the gas separated in the second washing tank 4 is compressed by the second compressor 6 and discharged into the first washing tank 3 for gas-liquid mixing, and then output from the mixed liquid outlet B. While ensuring synchronous gas-liquid mixing in both washing tanks, the pressure in the first washing tank 3, which has a higher pressure, is rapidly depressurized.

[0033] Example 6 This embodiment provides an integrated gas-liquid mixing and transportation process, the process steps of which are as follows: A station is constructed near the gas field, specifically a gas-liquid mixing station, including storage tank 2, pipelines, and other facilities, to meet the centralized treatment and transportation needs of gas field water. A computer control system is established within the constructed station. Gas field water input at mixing inlet A is pre-treated through filter 1 and then fed into storage tank 2. By opening the first inlet valve 9 and the second inlet valve 10, the water in storage tank 2 is transported to the first washing tank 3 and the second washing tank 4 for gas-liquid separation. If the gas pressure in the second washing tank 4 becomes too high, it is detected by the second liquid level sensor 8. When the liquid level continues to rise, the second pressure regulating valve 18 automatically opens, returning the gas field water from the second washing tank 4 to the storage tank 2. Simultaneously, the valve closes... Close the second liquid inlet valve 10, and open the first air inlet valve 11, the first exhaust valve 12, the second air inlet valve 13, the second exhaust valve 14, the first liquid outlet valve 15, and the second liquid outlet valve 16. The gas separated in the first washing tank 3 is compressed by the first compressor 5 and discharged into the second washing tank 4 for gas-liquid mixing, and then output from the mixed liquid outlet B. Simultaneously, the gas separated in the second washing tank 4 is compressed by the second compressor 6 and discharged into the first washing tank 3 for gas-liquid mixing, and then output from the mixed liquid outlet B. While ensuring synchronous gas-liquid mixing in both washing tanks, the pressure in the second washing tank 4, which has a higher pressure, is quickly released to achieve safe gas-liquid mixing and to prevent leakage, thereby ensuring production output.

[0034] Example 7 Based on Examples 4, 5, or 6, this embodiment provides steps for establishing an integrated computer control system to centrally monitor, control, and manage the production process of the gas-liquid mixing station, thereby improving production efficiency and safety.

[0035] The steps for establishing the computer control system are as follows: Determine the functional requirements of the control system: Before establishing an integrated computer control system, it is necessary to conduct a detailed analysis and evaluation of the production process of the gas-liquid mixing station to determine the functional requirements of the control system, including data acquisition, process control, and fault diagnosis.

[0036] Choosing a suitable control system: Based on the functional requirements of the control system, select a suitable control system, including PLC, DCS, etc. A PLC is a programmable logic controller capable of implementing simple automatic control functions; a DCS is a distributed control system capable of implementing complex automatic control functions.

[0037] Install and configure the control system: Install and configure the selected control system according to the design requirements. Ensure that both the hardware and software of the control system are functioning correctly.

[0038] Data acquisition and processing: By installing sensors and actuators, various data such as pressure, temperature, and flow rate are collected during the production process of the gas-liquid mixing station. These data are then processed and analyzed to enable automatic control and management.

[0039] Process control: Based on the functional requirements of the control system, the corresponding control algorithm is used to control the process of gas-liquid mixing and conveying station, such as adjusting valve opening, adjusting heating or cooling, etc.

[0040] Fault diagnosis: By installing fault diagnosis equipment, the production process of the gas-liquid mixed transmission station can be monitored and faults diagnosed in real time, so as to detect and deal with faults in a timely manner and improve production efficiency and safety.

[0041] Data management and analysis: Storing, managing, and analyzing data from the gas-liquid mixing station's production process to optimize and control the production process.

[0042] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc., are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0043] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0044] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas-liquid mixing and conveying integrated device, disposed between a mixing inlet and a mixing outlet, characterized in that, The system includes a storage tank (2), a first washing tank (3), a second washing tank (4), a first compressor (5), and a second compressor (6). The inlet of the storage tank (2) is connected to the mixing inlet. The outlet of the storage tank (2) is connected to the inlets of the first washing tank (3) and the second washing tank (4) respectively. The first compressor (5) is installed on the pipe between the gas outlet at the top of the first washing tank (3) and the gas inlet at the bottom of the second washing tank (4). The second compressor (6) is installed on the pipe between the gas outlet at the top of the second washing tank (4) and the gas inlet at the bottom of the first washing tank (3). The bottoms of the first washing tank (3) and the second washing tank (4) are both connected to the mixing outlet.

2. The gas-liquid mixing and transporting integrated device according to claim 1, characterized in that, The first washing tank (3) is equipped with a first pressure regulating valve (17) at the top, and the second washing tank (4) is equipped with a second pressure regulating valve (18) at the top. The first pressure regulating valve (17) and the second pressure regulating valve (18) are connected to the upper end of the liquid storage tank (2) through an external pipeline.

3. The gas-liquid mixing and transporting integrated device according to claim 1, characterized in that, A first intake valve (11) is installed on the pipe connecting the first washing tank (3) and the first compressor (5), and a first exhaust valve (12) is installed on the pipe connecting the first compressor (5) and the second washing tank (4).

4. The gas-liquid mixing and transporting integrated device according to claim 3, characterized in that, A second intake valve (13) is installed on the pipe connecting the second washing tank (4) and the second compressor (6), and a second exhaust valve (14) is installed on the pipe connecting the second compressor (6) and the first washing tank (3).

5. The gas-liquid mixing and transporting integrated device according to claim 4, characterized in that, Liquid level sensors are installed in the first washing tank (3) and the second washing tank (4).

6. The gas-liquid mixing and transporting integrated device according to claim 1, characterized in that, A first inlet valve (9) is installed on the pipe connecting the storage tank (2) and the first washing tank (3), and a second inlet valve (10) is installed on the pipe connecting the storage tank (2) and the second washing tank (4).

7. The gas-liquid mixing and transporting integrated device according to claim 6, characterized in that, A first drain valve (15) is installed on the pipe connecting the first washing tank (3) to the mixing outlet, and a second drain valve (16) is installed on the pipe connecting the second washing tank (4) to the mixing outlet.

8. The gas-liquid mixing and transporting integrated device according to claim 1, characterized in that, The system also includes a filter (1), which is located between the inlet of the storage tank (2) and the mixing inlet.

9. A gas-liquid mixed transport integration process using the gas-liquid mixed transport integration device as described in claim 1, characterized in that, Includes the following steps: S1: Construct a gas-liquid mixed transport station; S2: Establish a computer control system within the constructed gas-liquid mixing station; S3: After pretreatment, the water entering the gas field is introduced into the storage tank (2); S4: The liquid in the storage tank (2) is transferred to the first washing tank (3) and the second washing tank (4) respectively for gas-liquid separation; S5: Compress the gas in the first washing tank (3) and send it into the second washing tank (4), and compress the gas in the second washing tank (4) and send it into the first washing tank (3); S6: When the hydraulic pressure in the first washing tank (3) and the second washing tank (4) in S5 exceeds the standard, reverse the liquid to reduce the pressure, and then redistribute the liquid into the first washing tank (3) and the second washing tank (4); S7: Repeat steps S3-S6 to continue gas-liquid mixing.

10. The gas-liquid mixed transport integrated process according to claim 9, characterized in that, In step S2, the computer control system is used to centrally monitor, control, and schedule the production process of the gas-liquid mixing station.

Images