Multifunctional system for water removal, sand removal and cooling of shale gas

Abstract

The invention relates to the technical field of shale gas exploitation, in particular to a multifunctional system for water removal, sand removal and cooling of shale gas. According to the technical scheme, the device comprises a baffle separation device, a flow collection bin, a water removal bin, a sand setting chamber and a water storage bin; a sand discharging bin and a sand removing bin are arranged in the baffle separation device, a movable bin door is arranged between the sand discharging bin and the sand removing bin, the sand discharging bin is connected with the flow collecting bin through a first exhaust pipe, and the sand discharging bin is connected with the sand settling chamber through a first drainage pipe; one side of the collecting bin is connected with the water removal bin through a second exhaust pipe, and the bottom of the collecting bin is communicated with the sand setting chamber through a second drainage pipe; a molecular sieve is arranged at the top of the dewatering bin which is connected with the sand setting chamber through a second air inlet pipe. Water removal, sand removal and cooling treatment of the shale gas can be efficiently achieved at the same time, the situation that only one problem can be solved in the past is changed, and the shale gas treatment efficiency and quality are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shale gas exploitation, and particularly relates to a multifunctional system for removing water, sand and reducing temperature of shale gas. BACKGROUND

[0002] With the gradual maturity of shale gas exploitation technology, the proportion of shale gas production in natural gas production is gradually increasing, which has greatly changed the world energy structure. In the process of shale gas exploitation, part of the formation sand, liquid and the like are carried in the fluid, so that the fluid presents a multiphase flow state. Shale gas as an important unconventional natural gas resource occupies an increasingly important position in the global energy field in recent years. With the continuous progress of shale gas exploitation technology, its exploitation scale continues to expand. In the process of shale gas exploitation, shale gas is often carried with a large amount of moisture and sand particles when it is exploited from the formation, and has a high temperature. The moisture not only reduces the calorific value of shale gas and increases the transportation cost, but also can cause corrosion in the pipeline, shorten the service life of the pipeline, and even cause pipeline leakage and bring safety hazards in serious cases. The existing shale gas treatment can only solve a single problem of water removal, sand removal or temperature reduction, and it is difficult to simultaneously and efficiently realize multifunctional treatment of water removal, sand removal and temperature reduction. Moreover, part of the equipment has defects of complex structure, low processing efficiency and low automation degree, which reduces the efficiency of exploitation. Therefore, the present application provides a multifunctional system for removing water, sand and reducing temperature of shale gas. SUMMARY

[0003] The present application aims at the problems in the background art that shale gas treatment can only solve a single problem of water removal, sand removal or temperature reduction, and it is difficult to simultaneously and efficiently realize multifunctional treatment of water removal, sand removal and temperature reduction. Moreover, part of the equipment has defects of complex structure, low processing efficiency and low automation degree, which reduces the efficiency of exploitation. The present application provides a multifunctional system for removing water, sand and reducing temperature of shale gas.

[0004] The technical scheme of the present application is a shale gas water removal, sand removal, and temperature reduction multifunctional system, comprising a baffle separation device, a flow collection bin, a water removal bin, a sand settling chamber, and a water storage bin; the baffle separation device is internally provided with a sand discharge bin and a sand removal bin, and there is a movable bin door between the sand discharge bin and the sand removal bin; the sand discharge bin is connected with the flow collection bin through a first exhaust pipe; the sand discharge bin is connected with the sand settling chamber through a first water discharge pipe; a backfill water inlet and a water inlet are arranged on the top plate of the flow collection bin; one side of the flow collection bin is connected with the water removal bin through a second exhaust pipe; the bottom of the flow collection bin is communicated with the sand settling chamber through a second water discharge pipe; a molecular sieve is arranged on the top of the water removal bin; the water removal bin is connected with the sand settling chamber through a second air inlet pipe; the bottom of the water removal bin is communicated with the water storage bin through a third water discharge pipe; the sand settling chamber is internally provided with a primary sand settling chamber and a secondary sand settling chamber; the primary sand settling chamber is internally provided with a bottom baffle, a vertical baffle, and a partition plate; the secondary sand settling chamber extends to the water storage bin through a first circulating water pipe, and a second filter screen is arranged at the inlet of the first circulating water pipe; the water storage bin is connected with the flow collection bin through a second circulating water pipe; and a third exhaust pipe is arranged on one side of the sand settling chamber.

[0005] Optionally, the sand discharge bin, the flow collection bin, the primary sand settling chamber, and the secondary sand settling chamber are pyramid-shaped; baffles and a first filter screen are arranged in the sand discharge bin; the distance between the baffle and the front and rear walls of the sand discharge bin is 5-10 cm; and the distance between the baffle and the first filter screen at the lower end of the sand discharge bin is 5-10 cm.

[0006] Optionally, an air inlet pipe is arranged on one side of the baffle separation device; a first flow rate adjusting valve is arranged on the air inlet pipe; a first pressure sensor is arranged in the sand discharge bin; and the first pressure sensor and the first flow rate adjusting valve are connected through a microprocessor signal.

[0007] Optionally, a first distance measuring sensor is arranged on the top of the sand discharge bin; a signal lamp is arranged on the sand discharge bin; and the first distance measuring sensor and the signal lamp are connected through a microprocessor signal.

[0008] Optionally, a check valve is arranged on the first exhaust pipe between the baffle separation device and the flow collection bin.

[0009] Optionally, a second distance measuring sensor is arranged on the top; a third flow rate adjusting valve is arranged on the second water discharge pipe; a fourth flow rate adjusting valve is arranged on the second circulating water pipe; and the second distance measuring sensor, the third flow rate adjusting valve, and the fourth flow rate adjusting valve are connected through a microprocessor signal.

[0010] Optionally, a temperature sensor is arranged in the flow collection bin; and the microprocessor is connected with the temperature sensor and the third flow rate adjusting valve through a signal.

[0011] Optionally, a first check valve and a second flow regulating valve are provided on the second exhaust pipe between the collection chamber and the dewatering chamber. A second pressure sensor is provided inside the collection chamber. The second pressure sensor and the first check valve and the second flow regulating valve are connected by a microprocessor signal.

[0012] Optionally, the dewatering chamber is provided with a reference liquid level and a drainage liquid level, the dewatering chamber is provided with a third ranging sensor, the third drainage pipe is provided with a first shut-off valve, and the third ranging sensor and the first shut-off valve are connected by a microprocessor signal.

[0013] Optionally, a second one-way valve is provided on the second air inlet pipe between the dewatering chamber and the grit chamber. The gap between the bottom of the partition plate and the bottom baffle inside the grit chamber is 5-10 cm. An overflow port is provided on the upper part of the vertical baffle. The bottom of the primary grit chamber is connected to the secondary grit chamber through a first sewage pipe. A second shut-off valve is provided on the first sewage pipe. The bottom of the secondary grit chamber is connected to the outside through a second sewage pipe. A third shut-off valve is provided on the second sewage pipe. A fourth distance sensor is provided on the top of the primary grit chamber. A third flow regulating valve is provided on the second drain pipe. The fourth distance sensor, the third flow regulating valve, the second shut-off valve, and the third shut-off valve are connected by a microprocessor signal.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: This invention, through the ingenious design of multiple components such as the baffle separation device, the flow collection chamber, the water removal chamber, the sand settling chamber, and the water storage chamber, and their connection relationships, can simultaneously and efficiently achieve water removal, sand removal, and cooling treatment of shale gas, changing the previous situation where only one problem could be solved at a time, and greatly improving the efficiency and quality of shale gas treatment. Furthermore, by setting up a sedimentation chamber and designing the sand discharge bin and collection bin, the present invention can better collect sand particles. At the same time, the sedimentation chamber can treat the discharged wastewater and make it recycle, thereby improving the environmental protection and efficiency of the sand removal device. Furthermore, this invention achieves automated control through multiple sensors and regulating valves connected via a microprocessor. The first pressure sensor in the sand discharge chamber is connected to the first flow rate regulating valve on the air inlet pipe, which can automatically adjust the air intake speed according to the pressure in the sand discharge chamber. The distance measuring sensors installed in each chamber can be connected to the corresponding valves to automatically control the drainage and sewage discharge operations, greatly reducing manual intervention, improving the stability and reliability of equipment operation, and thus improving the overall efficiency of shale gas extraction. Attached Figure Description

[0015] Figure 1 A schematic diagram of a multifunctional system for dewatering, sand removal, and cooling of shale gas according to the present invention is provided; Figure 2 This is a schematic diagram of the internal structure of the baffle separation device; Figure 3 This is a schematic diagram of the internal structure of the sedimentation chamber. Figure 1 Sectional view along the AA direction.

[0016] Figure label: 1. Baffle separation device; 11. Sand discharge bin; 12. Sand removal bin; 13. Movable bin door; 14. First exhaust pipe; 141. Check valve; 15. First drain pipe; 16. Baffle; 17. First filter screen; 18. Air inlet pipe; 181. First flow rate regulating valve; 2. Collection chamber; 21. Return water inlet; 22. Water inlet; 23. Second vent pipe; 231. Second flow regulating valve; 232. First check valve; 24. Second drain pipe; 241. Third flow regulating valve; 3. Water removal chamber; 31. Molecular sieve; 32. Second air inlet pipe; 321. Second one-way valve; 33. Third drain pipe; 331. First shut-off valve; 34. Third exhaust pipe; 4. Grit chamber; 41. Primary grit chamber; 42. Secondary grit chamber; 43. Bottom baffle; 44. Vertical baffle; 441. Overflow outlet; 45. Partition; 46. First circulating water pipe; 47. First drain pipe; 471. Second shut-off valve; 48. Second drain pipe; 481. Third shut-off valve; 49. Second filter screen; 5. Water storage tank; 51. Second circulating water pipe; 511. Fourth flow regulating valve. Detailed Implementation

[0017] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0019] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Example

[0023] like Figures 1 to 3As shown, the present invention proposes a multifunctional system for shale gas dewatering, sand removal, and cooling, comprising a baffle separation device 1, a collection chamber 2, a dewatering chamber 3, a settling chamber 4, and a water storage chamber 5. The baffle separation device 1 is equipped with a sand discharge chamber 11 and a sand removal chamber 12, with a movable door 13 between them to control the flow of sand between the two chambers. The sand removal chamber 12 is connected to the collection chamber 2 via a first exhaust pipe 14, which is equipped with a check valve 141 to prevent backflow of gas. The sand removal chamber 12 is connected to the settling chamber 4 via a first drain pipe 15 to discharge the sand removal process. The water produced in the collection chamber 2; the top plate of the collection chamber 2 is equipped with a return water inlet 21 and a water inlet 22, which are used for returning water and injecting fresh water, respectively. A temperature sensor is installed inside the collection chamber 2; this temperature sensor is existing technology and will not be described in detail here. It is used to monitor the temperature of the liquid inside the collection chamber 2 in real time. One side of the collection chamber 2 is connected to the dewatering chamber 3 through a second exhaust pipe 23. The second exhaust pipe 23 is equipped with a first one-way valve 232 and a second flow regulating valve 231 to ensure that the gas can only flow in one direction and the flow rate can be adjusted. A second pressure sensor is installed inside the collection chamber 2; this pressure sensor is existing technology and will not be described in detail here. As described in detail, the pressure inside the collection chamber 2 is monitored in real time. The second pressure sensor and the first one-way valve 232 are connected to the second flow regulating valve 231 via a microprocessor signal connection. The microprocessor receives the pressure value detected by the second pressure sensor and compares it with the set pressure value: when the detected pressure value is greater than the set value, the microprocessor controls the second flow regulating valve 231 to increase the flow rate; when the detected pressure value is less than the set value, the microprocessor controls the second flow regulating valve 231 to decrease the flow rate. The bottom of the collection chamber 2 is connected to the sedimentation chamber 4 through the second drain pipe 24. The microprocessor is connected to the temperature sensor and the third flow regulating valve 241 via a signal connection. Next, the microprocessor detects the liquid temperature in the collection chamber 2 and compares it with the set value: when the temperature is higher than the set value, it controls the third flow regulating valve 241 and the fourth flow regulating valve 511 to increase the flow rate; when the temperature returns to the set value, it controls the third flow regulating valve 241 and the fourth flow regulating valve 511 to restore the initial flow rate; the top of the dewatering chamber 3 is equipped with a molecular sieve 31 to remove moisture from the shale gas. The dewatering chamber 3 is equipped with a reference liquid level and a drainage liquid level, and is also equipped with a third ranging sensor. The ranging sensor is existing technology and will not be described in detail here. It is used to monitor the liquid level height in the dewatering chamber 3.The dewatering chamber 3 is connected to the sedimentation chamber 4 via a second air inlet pipe 32. A second one-way valve 321 is installed on the second air inlet pipe 32 to ensure unidirectional gas flow. The bottom of the dewatering chamber 3 is connected to the water storage chamber 5 via a third drain pipe 33. A first shut-off valve 331 is installed on the third drain pipe 33 to control drainage. A third ranging sensor is connected to the first shut-off valve 331 via a microprocessor signal connection. The microprocessor receives ranging data detected by the third ranging sensor: when the drainage level is reached, it controls the opening of the first shut-off valve 331 on the third drain pipe 33 to drain the water; until... When the reference liquid level is reached, the first shut-off valve 331 is closed. The sedimentation chamber 4 contains a primary sedimentation chamber 41 and a secondary sedimentation chamber 42. The primary sedimentation chamber 41 is equipped with a bottom baffle 43, a vertical baffle 44 and a partition 45 for multi-stage sedimentation and separation of sand. The secondary sedimentation chamber 42 extends to the water storage tank 5 through the first circulating water pipe 46, and a second filter screen 49 is provided at the inlet of the first circulating water pipe 46. The water storage tank 5 and the collection tank 2 are connected through the second circulating water pipe 51. A third exhaust pipe 34 is connected to one side of the sedimentation chamber 4 to discharge the gas in the sedimentation chamber 4.

[0024] like Figure 2 and Figure 3 As shown, the bottoms of the sand removal chamber 12, the collection chamber 2, the primary sand settling chamber 41, and the secondary sand settling chamber 42 are all pyramidal. The sand removal chamber 12 is equipped with a baffle 16 and a first filter screen 17. The distance between the baffle 16 and the front and rear walls of the sand removal chamber 12 is 5-10cm, and the distance between the lower end of the baffle 16 and the first filter screen 17 is 5-10cm.

[0025] Furthermore, an air inlet pipe 18 is provided on one side of the baffle separation device 1, and a first flow rate regulating valve 181 is provided on the air inlet pipe 18. A first pressure sensor is provided in the sand discharge chamber 11 to detect the weight of sand in the sand discharge chamber 11. That is, a load-bearing plate or container is placed at the bottom of the sand discharge chamber 11 and a pressure sensor for detecting weight changes is installed at the bottom. Both sensors should be based on the same principle. The first pressure sensor and the first flow rate regulating valve 181 are connected by a microprocessor signal. The microprocessor receives the pressure value detected by the first pressure sensor and compares it with the set pressure value: when the detected pressure value is greater than the set value, the first flow rate regulating valve 181 is controlled to reduce the flow rate; when the detected pressure value is less than the set value, the first flow rate regulating valve 181 is controlled to increase the flow rate.

[0026] Secondly, a first distance sensor is installed on the top of the sand discharge bin 11 to detect the distance between the top surface of the sand and the sensor, and compare it with the initial distance measurement data to determine the thickness or change in the thickness of the sand layer. An indicator light is installed on the sand discharge bin 11. The first distance sensor and the indicator light are connected by a microprocessor signal. The microprocessor receives the distance measurement data detected by the first distance sensor, compares it with the initial distance measurement data, and detects the thickness of the sand layer on the first filter screen 17: when the thickness value is greater than the set value, the control indicator light turns red to prompt the worker to sweep the sand layer into the sand removal bin 12; when the thickness value is less than the set value, the control indicator light turns green.

[0027] Furthermore, a second distance sensor is installed at the top, a third flow regulating valve 241 is installed on the second drain pipe 24, and a fourth flow regulating valve 511 is installed on the second circulating water pipe 51. The second distance sensor is connected to the third flow regulating valve 241 and the fourth flow regulating valve 511 via a microprocessor signal. The microprocessor controls the third flow regulating valve 241 on the second drain pipe 24 and the fourth flow regulating valve 511 on the second circulating water pipe 51 to close, controlling the fresh water flow to be injected from the water inlet 22. Based on the distance between the device water surface and the secondary liquid surface detected by the second distance sensor and the sewage discharge speed information of the sedimentation chamber 4 measured by the third distance sensor, the fresh water injection speed is calculated, and the microprocessor controls the fourth flow regulating valve 511 to open, stopping the injection of fresh water from the water inlet 22, while simultaneously controlling the third flow regulating valve 241 on the second drain pipe 24 to increase the drainage volume. When the liquid level in the collection chamber 2 returns to the primary liquid level, the microprocessor controls the third flow regulating valve 241 on the second drain pipe 24 to restore the normal drainage volume.

[0028] In addition, a second one-way valve 321 is installed on the second air inlet pipe 32 between the dewatering tank 3 and the sedimentation chamber 4. The gap between the bottom of the partition plate 45 and the bottom baffle plate 43 inside the sedimentation chamber 4 is 5-10cm. There is an overflow port 441 at the top of the vertical baffle plate 44. The bottom of the primary sedimentation chamber 41 is connected to the secondary sedimentation chamber 42 through the first sewage pipe 47. A second shut-off valve 471 is installed on the first sewage pipe 47. The bottom of the secondary sedimentation chamber 42 is connected to the outside through the second sewage pipe 48. A third shut-off valve 481 is installed on the second sewage pipe 48. A fourth distance sensor is installed on the top of the primary sedimentation chamber 41. A third flow regulating valve 241 is installed on the second drain pipe 24. The fourth distance sensor, the third flow regulating valve 241, and the second shut-off valve are all present in the design. The microprocessor connects valve 471 and the third shut-off valve 481 via a signal. The microprocessor receives the ranging data detected by the fourth ranging sensor and compares it with the initial ranging data to detect the thickness of the sand layer on the bottom baffle 43. When the thickness is greater than the set value, the microprocessor controls the third flow regulating valve 241 and the fourth flow regulating valve 511 to close, controls the fresh water flow to be injected into the collection chamber from the water inlet 22, and controls the second shut-off valve 471 and the third shut-off valve 481 to open for sewage discharge. When the thickness is less than the set value, sewage discharge ends, the microprocessor controls the fourth flow regulating valve 511 to open, controls the third flow regulating valve 241 to increase the discharge volume, controls the second shut-off valve 471 and the third shut-off valve 481 to close, and controls the water inlet 22 to stop water injection.

[0029] The working principle of this embodiment is as follows: The multiphase fluid enters the desanding chamber 12 of the baffle separation device 1 through the first air inlet pipe 18. Some large sand and gravel particles and liquid collide with the baffle 16 due to inertia and are deposited in the desanding chamber 12. After the large sand and gravel particles are filtered out by the first filter screen 17, only fine sand particles remain in the liquid and flow to the settling chamber 4 through the first drain pipe 15. Meanwhile, the gas flows from both sides and the bottom of the baffle 16 to the collection chamber 2. In the collection chamber 2, since methane is poorly soluble in water, most of the methane flows to the dewatering chamber 3 from the second exhaust pipe 23 at the top of the collection chamber 2 under a certain gas pressure. The remaining fine particles are retained in the collection chamber 2 due to the circulating water and are discharged to the settling chamber 4 through the second drain pipe 24. At the same time, the cooling effect of shale gas is achieved by setting the length of the collection chamber 2 and the flowing water. In the dewatering chamber 3, the inlet and outlet positions of the fluid are staggered at the same level to increase the fluid flow. During the passage time of molecular sieve 31, the liquid-carrying gas enters from one end of molecular sieve 31 and exits from the other end. After passing through molecular sieve 31, the multiphase fluid filters the water and completes all purification. After the filtered water accumulated in the dewatering chamber 3 reaches a certain amount, it is discharged to the water storage chamber 5 through the third drain pipe 33. In the grit chamber 4, multiple water sources flow continuously to the primary grit chamber 41. The water flows from bottom to top in the secondary grit chamber 41. After sufficient sedimentation, it flows out from the overflow port 441 at the top of the secondary vertical baffle 44. After a certain amount of sedimentation in the secondary grit chamber 42, it flows into the water storage chamber 5 from the first circulating water pipe 46 set inside the secondary grit chamber 42. The fluid is filtered for the third time by the second filter screen 49 at the inlet of the secondary first circulating water pipe 46. The methane collected above the grit chamber 4 flows unidirectionally to the dewatering chamber through the second air inlet pipe 32. The water in the water storage chamber flows back to the collection chamber 2 through the return water port 21, completing the water circulation.

[0030] When the first ranging sensor in the sand discharge bin of the baffle separation device detects a thickness value greater than the set thickness value, the secondary microprocessor control indicator light turns red to indicate that the worker can use a brush to sweep the sand layer into the sand discharge bin. When the detected thickness value is greater than the set thickness value, the secondary microprocessor control indicator light turns green.

[0031] When the thickness value detected in the primary sand removal chamber is greater than the set thickness value, the secondary microprocessor controls the secondary third flow regulating valve 241 to close and controls the secondary second shut-off valve 471 and the third shut-off valve 481 to open for sewage discharge. When the thickness value detected is less than the set thickness value, the sewage discharge ends, the secondary microprocessor controls the secondary third flow regulating valve 241 to open and controls the secondary second shut-off valve 471 and the third shut-off valve 481 to close.

[0032] When cleaning the fine sand in the secondary settling chamber 42, the first circulating water pipe 46 injects fresh water into the chamber through the secondary water inlet 22. The injection speed of the fresh water is calculated based on the information from the second ranging sensor, so as to ensure that the device can achieve cooling by increasing the water volume when water circulation is not possible, without affecting the extraction of shale gas. When the sewage discharge of the secondary settling chamber 42 is finished, the microprocessor controls the fourth flow regulating valve 511 on the secondary second circulating water pipe 51 to close, controlling the fresh water to stop being injected into the chamber through the secondary water inlet 22. At the same time, it controls the third flow regulating valve 241 on the secondary second drain pipe 24 to increase the drainage volume. When the secondary liquid level in the collection chamber 2 returns to the primary liquid level, the secondary microprocessor controls the third flow regulating valve 241 on the secondary second drain pipe 24 to restore the normal drainage volume. The secondary water storage chamber 5 is mainly used to buffer the water flow and includes collecting water in the dewatering chamber 3, which helps to achieve a dynamic balance between the water in the collection chamber 2 and the settling chamber 4.

[0033] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A multifunctional system for dewatering, sand removal, and cooling shale gas, characterized in that: It includes a baffle separation device (1), a collection chamber (2), a water removal chamber (3), a sedimentation chamber (4), and a water storage chamber (5); The baffle separation device (1) is equipped with a sand discharge chamber (11) and a sand removal chamber (12), and there is a movable chamber door (13) between the sand discharge chamber (11) and the sand removal chamber (12). The sand removal chamber (12) is connected to the collection chamber (2) through the first exhaust pipe (14), and the sand removal chamber (12) is connected to the settling chamber (4) through the first drain pipe (15). The top plate of the collection chamber (2) is provided with a return water inlet (21) and a water inlet (22). One side of the collection chamber (2) is connected to the dewatering chamber (3) through a second exhaust pipe (23). The bottom of the collection chamber (2) is connected to the sedimentation chamber (4) through a second drain pipe (24). The top of the dewatering chamber (3) is equipped with a molecular sieve (31). The dewatering chamber (3) is connected to the sedimentation chamber (4) through the second air inlet pipe (32). The bottom of the dewatering chamber (3) is connected to the water storage chamber (5) through the third drain pipe (33). The sedimentation chamber (4) contains a primary sedimentation chamber (41) and a secondary sedimentation chamber (42). The primary sedimentation chamber (41) is equipped with a bottom baffle (43), a vertical baffle (44), and a partition (45). The secondary sedimentation chamber (42) extends to the water storage tank (5) through a first circulating water pipe (46), and a second filter screen (49) is provided at the inlet of the first circulating water pipe (46). The water storage tank (5) is connected to the collection tank (2) through a second circulating water pipe (51). A third exhaust pipe (34) is connected to one side of the sedimentation chamber (4).

2. The multifunctional system for dewatering, sand removal, and cooling of shale gas according to claim 1, characterized in that: The bottoms of the sand removal chamber (12), the collection chamber (2), the primary sedimentation chamber (41) and the secondary sedimentation chamber (42) are all pyramidal. The sand removal chamber (12) is equipped with a baffle (16) and a first filter screen (17). The distance between the baffle (16) and the front and rear walls of the sand removal chamber (12) is 5-10cm. The lower end of the baffle (16) and the sand removal chamber (12) is 5-10cm away from the first filter screen (17).

3. The multifunctional system for dewatering, sand removal, and cooling of shale gas according to claim 2, characterized in that: The baffle separation device (1) has an air inlet pipe (18) on one side, and a first flow rate regulating valve (181) is provided on the air inlet pipe (18). The sand discharge chamber (11) has a first pressure sensor, and the first pressure sensor and the first flow rate regulating valve (181) are connected by a microprocessor signal.

4. The multifunctional system for dewatering, sand removal, and cooling of shale gas according to claim 3, characterized in that: The top of the sand discharge bin (11) is equipped with a first ranging sensor, and the sand discharge bin (11) is equipped with a signal light. The first ranging sensor and the signal light are connected by a microprocessor signal.

5. The multifunctional system for dewatering, sand removal, and cooling of shale gas according to claim 1, characterized in that: A check valve (141) is provided on the first exhaust pipe (14) between the lower part of the baffle separation device (1) and the collection chamber (2).

6. The multifunctional system for dewatering, sand removal, and cooling of shale gas according to claim 1, characterized in that: The top is provided with a second distance sensor, the second drain pipe (24) is provided with a third flow regulating valve (241), the second circulating water pipe (51) is provided with a fourth flow regulating valve (511), and the second distance sensor is connected to the third flow regulating valve (241) and the fourth flow regulating valve (511) via a microprocessor signal.

7. The multifunctional system for dewatering, sand removal, and cooling of shale gas according to claim 1, characterized in that: The flow collection chamber (2) is equipped with a temperature sensor, and the microprocessor is connected to the temperature sensor and the third flow regulating valve (241) via signal connection.

8. The multifunctional system for dewatering, sand removal, and cooling shale gas according to claim 1, characterized in that: The second exhaust pipe (23) between the collection chamber (2) and the dewatering chamber (3) is equipped with a first one-way valve (232) and a second flow regulating valve (231). The collection chamber (2) is equipped with a second pressure sensor. The second pressure sensor and the first one-way valve (232) and the second flow regulating valve (231) are connected by a microprocessor signal.

9. The multifunctional system for dewatering, sand removal, and cooling of shale gas according to claim 1, characterized in that: The dewatering chamber (3) is equipped with a reference liquid level and a drainage liquid level. The dewatering chamber (3) is equipped with a third ranging sensor. The third drainage pipe (33) is equipped with a first shut-off valve (331). The third ranging sensor and the first shut-off valve (331) are connected by a microprocessor signal.

10. A multifunctional system for dewatering, sand removal, and cooling shale gas according to claim 1, characterized in that: A second one-way valve (321) is provided on the second air inlet pipe (32) between the dewatering chamber (3) and the sedimentation chamber (4). The gap between the bottom of the partition plate (45) and the bottom baffle (43) inside the sedimentation chamber (4) is 5-10cm. There is an overflow port (441) on the upper part of the vertical baffle (44). The bottom of the primary sedimentation chamber (41) is connected to the secondary sedimentation chamber (42) through the first sewage pipe (47). A second shut-off valve (471) is provided on the first sewage pipe (47). The bottom of the secondary sedimentation chamber (42) is connected to the outside through the second sewage pipe (48). The second sewage pipe (48) is equipped with a third shut-off valve (481). The top of the primary sedimentation chamber (41) is equipped with a fourth distance sensor. The second drain pipe (24) is equipped with a third flow regulating valve (241). The fourth distance sensor, the third flow regulating valve (241), the second shut-off valve (471) and the third shut-off valve (481) are connected by a microprocessor signal.

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