A device for preparing fluidized solidified soil based on waste drilling mud and its application method

Abstract

This invention relates to the field of solid waste resource utilization technology, and more particularly to a device and method for preparing fluidized solidified soil based on waste drilling mud. The device comprises: a frame, on which a mud storage tank, a cementitious material storage tank, and a mixing tank are mounted; the mixing tank includes a confluence chamber and a discharge chamber; a conveying assembly, including a mud conveying mechanism and a cementitious material conveying mechanism; a connecting assembly, used to control the connection between the confluence chamber and the discharge chamber; a fluid retention assembly, including a discharge mechanism and a return mechanism; a rotary cleaning assembly, including a drive mechanism and a scraping mechanism; and a vibratory mixing assembly, including an impact energy storage mechanism, a vibration mechanism, and a discharge mechanism. This invention, through the coordinated operation of the discharge mechanism and the return mechanism, allows a portion of the slurry in the discharge chamber to be re-transported to the confluence chamber via the return mechanism, forming a continuous slurry circulation flow.

Description

Technical Field

[0001] This invention relates to the field of solid waste resource utilization technology, specifically to a device and method for preparing fluidized solidified soil based on waste drilling mud. Background Technology

[0002] Waste drilling mud is a major waste generated during oil, gas, and geological exploration drilling processes. It is characterized by high water content (typically 50%–90%), fine solid particles (mostly less than 10 μm in diameter), and high system stability (containing large amounts of clay, polymers, and emulsified components). Using it to prepare fluidized solidified soil allows for the resource utilization of solid waste for applications such as road base courses, pipeline backfilling, and foundation pit backfilling. However, due to the high viscosity and stability of waste drilling mud, problems such as slurry settling, wall adhesion, and localized solidification can easily occur inside the mixing equipment during the continuous preparation of fluidized solidified soil, affecting product quality and production continuity.

[0003] Existing equipment for preparing fluidized solidified soil typically employs simple mixing tanks or pipeline mixers to mix waste drilling mud and cementitious materials once or several times before discharging the mixture directly. Such equipment generally uses a single-pass operation, resulting in a short residence time of the slurry within the mixing device. The uniformity of the mixture depends on the stirring intensity, and all slurry is discharged after mixing, leaving no material remaining in the mixing chamber.

[0004] The existing equipment has the following prominent problems in continuous production: First, the slurry flows discontinuously in the mixing chamber, which is prone to intermittent flow interruption or local stagnation, resulting in uneven mixing; Second, the lack of continuous flow disturbance makes it easy for solid particles to settle and accumulate at the bottom or side walls of the chamber, or even solidify prematurely; Third, the deposits on the chamber walls cannot be effectively removed, and the equipment performance deteriorates after long-term operation, requiring frequent maintenance. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for preparing fluidized solidified soil based on waste drilling mud, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: On the one hand, an apparatus for preparing fluidized solidified soil based on waste drilling mud is provided, comprising: The frame is equipped with a mud storage tank, a cementitious material storage tank, and a mixing tank, wherein the mixing tank includes a confluence chamber and a discharge chamber; The conveying assembly includes a mud conveying mechanism and a cementing material conveying mechanism. The mud conveying mechanism is used to convey mud from the mud storage tank to the manifold, and the cementing material conveying mechanism is used to convey cementing material from the cementing material storage tank to the manifold. A connecting component, the connecting component being used to control the connection between the junction cavity and the discharge cavity; A flow retention assembly includes a discharge mechanism and a return mechanism. The discharge mechanism controls the output of slurry in the discharge chamber, and the return mechanism transports the remaining slurry in the discharge chamber to the confluence chamber. A rotary cleaning assembly includes a driving mechanism and a scraping mechanism. The driving mechanism is used to drive the scraping mechanism to move. The scraping mechanism is disposed in the junction cavity and is used to scrape off the deposits on the sidewall of the junction cavity. The excitation mixing assembly includes an impact energy storage mechanism, an excitation mechanism, and a discharge mechanism. The impact energy storage mechanism is disposed in the confluence cavity and is used to receive the jet kinetic energy of the slurry and compress air. The excitation mechanism is driven by the air compressed by the impact energy storage mechanism and is used to drive the scraping mechanism to vibrate. The discharge mechanism is used to agitate and mix the slurry in the confluence cavity using the gas discharged by the excitation mechanism.

[0007] Preferably, a feed pipe is provided at the top of the confluence cavity, and the mud conveying mechanism includes a mud conveying pump and a feed pipe. The mud conveying pump is connected to the outlet of the mud storage tank, and the mud conveying pump is interconnected with the feed pipe through the feed pipe.

[0008] Preferably, the gelling material conveying mechanism includes a metering valve and a second feed pipe. The metering valve is located at the bottom of the gelling material storage tank and is connected to the feed pipe through the second feed pipe.

[0009] Preferably, the confluence chamber is located above the discharge chamber, and the communication component includes a communication valve located at the bottom of the confluence chamber. The communication valve is used to connect the confluence chamber and the discharge chamber by opening the communication valve.

[0010] Preferably, the discharge mechanism includes a three-way proportional valve, and the reflux mechanism includes a reflux pump, a reflux pipe, and a reflux nozzle. The three-way proportional valve is disposed at the discharge port of the mixing tank. One outlet of the three-way proportional valve is connected to the reflux pump. The reflux pump is connected to the reflux pipe. The outlet of the reflux pipe is connected to the reflux nozzle, and the reflux nozzle is obliquely inserted into the feed pipe.

[0011] Preferably, the tilt angle of the return nozzle is 30° to 75°, and the return pipe is a bent pipe structure or an annular pipe structure.

[0012] Preferably, the driving mechanism includes a drive motor, a reducer, and a transmission rod, and the scraping mechanism includes elastic scrapers. The reducer is disposed at the top of the mixing tank, and the drive motor is connected to the transmission rod through the reducer. The transmission rod is disposed in the confluence cavity, and a plurality of elastic scrapers are arranged circumferentially around the transmission rod. The elastic scrapers are used to scrape off the deposits on the sidewall of the confluence cavity.

[0013] Preferably, the impact energy storage mechanism includes a mounting sleeve, a helical spring, an arc-shaped plate, a linkage rod, a piston block, a cylinder, and a gas cylinder. The mounting sleeve is disposed at the top of the confluence cavity. The two ends of the helical spring are respectively connected to the mounting sleeve and the arc-shaped plate. The mounting sleeve is sleeved on the outside of the transmission rod. The helical spring and the arc-shaped plate are sleeved on the outside of the mounting sleeve. The arc-shaped plate is disposed below the feed pipe. A linkage rod is connected to one side of the arc-shaped plate. The linkage rod is connected to the piston block through a ball joint. The piston block is movably connected to the cylinder. The cylinder is interconnected with the gas cylinder through an air inlet check valve.

[0014] Preferably, the excitation mechanism includes a vibrating piston cylinder, the discharge mechanism includes a connecting pipe and a pressure relief valve, the gas cylinder is connected to a delivery pipe via a rotary joint, the delivery pipe is connected to a plurality of vibrating piston cylinders, the vibrating piston cylinders are arranged corresponding to the elastic scraper, the vibrating piston cylinders are used to drive the elastic scraper to vibrate, the exhaust end of the vibrating piston cylinder is connected to the connecting pipe, the connecting pipe is connected to a plurality of pressure relief valves, and the pressure relief valves are arranged on the elastic scraper.

[0015] On the other hand, a method for using the above-described equipment for preparing fluidized solidified soil based on waste drilling mud is provided, comprising the following steps: A. Start the mud conveying mechanism to transport the waste drilling mud in the mud storage tank to the manifold of the mixing tank; start the cementitious material conveying mechanism to transport the cementitious material in the cementitious material storage tank to the manifold, where the mud and cementitious material initially come into contact and mix to form an initial mixed slurry. B, the connection between the junction chamber and the discharge chamber is controlled by the connecting component, so that the mixed slurry enters the discharge chamber; C. The discharge mechanism controls the output flow rate of the slurry in the discharge chamber, and the return flow mechanism controls the return flow rate to keep the slurry in the mixing tank in a continuous flow state. D, the reflux mechanism transports a portion of the slurry in the discharge chamber to the confluence chamber, and impacts the impact energy storage mechanism through the slurry jet; E, the impact energy storage mechanism receives the jet kinetic energy of the return slurry and compresses air, the compressed air drives the excitation mechanism, the excitation mechanism drives the scraping mechanism to vibrate, and scrapes off the deposits on the side wall of the confluence cavity; F, the gas discharged by the excitation mechanism is released into the confluence cavity through the discharge mechanism to turbulently mix the slurry in the confluence cavity.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) By setting up the discharge mechanism and the return mechanism in coordination, the present invention enables part of the slurry in the discharge chamber to be transported back to the confluence chamber through the return mechanism, forming a continuous slurry circulation flow; avoiding the generation of intermittent flow interruption or local dead zone, thereby significantly improving the mixing uniformity and ensuring the stability of the quality of the fluidized solidified soil product; (2) The slurry is continuously fed back to the confluence chamber through the reflux mechanism to form a dynamic flow cycle. At the same time, the compressed air is released by the discharge mechanism in the excitation mixing component to turbulently mix the slurry in the confluence chamber. The continuous flow turbulence keeps the solid particles in a suspended state, effectively preventing them from settling, accumulating or even solidifying prematurely at the bottom or side wall of the chamber. (3) Rotary cleaning assembly, in which the drive mechanism drives the scraping mechanism to move in the junction cavity, while the excitation mechanism is driven by the air compressed by the impact energy storage mechanism, which drives the scraping mechanism to generate high-frequency vibration, thereby realizing the active scraping and shaking off of the adhering material on the side wall of the junction cavity, effectively reducing the equipment maintenance frequency and extending the continuous operation cycle. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram showing the position and structure of the mud conveying mechanism, the cementitious material conveying mechanism, and the mixing tank of the present invention (the drive motor at the top of the mixing tank is hidden). Figure 3 This is a schematic diagram of the connection structure of each component of the mud conveying mechanism and the cementitious material conveying mechanism of the present invention; Figure 4 This is a schematic diagram showing the positions and structures of the feed pipe, feed channel one, and feed channel two of the present invention; Figure 5 This is a schematic diagram showing the location and structure of the return pipe and return nozzle of the present invention; Figure 6 This is a schematic diagram of the internal structure of the mixing tank of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the internal structure of the mixing tank of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the internal structure of the mixing tank of the present invention. Figure 3 ; Figure 9 This is a schematic diagram showing the structural positions of the mounting sleeve, helical spring, and arc plate in this invention. Figure 10 This is a schematic diagram of the internal structure of the cylinder of the present invention (the cylinder is shown in cross-section). Figure 11 This is a schematic diagram showing the position and structure of the elastic scraper and pressure relief valve of the present invention; Figure 12 This is a schematic diagram of the connection structure of the vibration piston cylinder, rotary joint, and delivery pipe of the present invention; Figure 13 This is a schematic diagram of the connection structure of the vibration piston cylinder, connecting pipe and pressure relief valve of the present invention.

[0018] In the diagram: 1. Frame, 2. Slurry storage tank, 3. Cementitious material storage tank, 4. Mixing tank, 41. Combination chamber, 42. Discharge chamber, 5. Feed pipe, 6. Slurry conveying pump, 7. Feed pipe one, 8. Metering valve, 9. Feed pipe two, 10. Connecting valve, 11. Three-way proportional valve, 12. Return pump, 13. Return pipe, 14. Return nozzle, 15. Drive motor, 16. Reducer, 17. Transmission rod, 18. Elastic scraper, 19. Mounting sleeve, 20. Helical spring, 21. Arc plate, 22. Linkage rod, 23. Piston block, 24. Cylinder, 25. Gas cylinder, 26. Vibrating piston cylinder, 27. Connecting pipe, 28. Pressure relief valve, 29. Rotary joint, 30. Conveying pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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] Please see Figures 1-13 The present invention provides a technical solution: An apparatus for preparing fluidized solidified soil based on waste drilling mud, as shown in the instruction manual. Figure 1 As shown, it includes a frame 1, on which a mud storage tank 2, a cementitious material storage tank 3 and a mixing tank 4 are provided. The mixing tank 4 includes a confluence chamber 41 and a discharge chamber 42.

[0021] The conveying assembly includes a mud conveying mechanism and a cementitious material conveying mechanism. The mud conveying mechanism is used to convey mud from the mud storage tank 2 to the manifold 41. The top of the manifold 41 is provided with a feed pipe 5. The mud conveying mechanism includes a mud conveying pump 6 and a feed pipe 7. The inlet of the mud conveying pump 6 is connected to the outlet of the mud storage tank 2, and the outlet of the mud conveying pump 6 is connected to the feed pipe 5 through the feed pipe 7. After the mud conveying pump 6 is started, it pumps the waste drilling mud from the mud storage tank 2 into the manifold 41. The cementitious material conveying mechanism is used to convey cementitious material from the cementitious material storage tank 3 to the manifold 41.

[0022] In this embodiment, the cementitious material conveying mechanism includes a metering valve 8 and a second feed pipe 9. The metering valve 8 is located at the bottom of the cementitious material storage tank 3, and the outlet of the metering valve 8 is connected to the feed pipe 5 through the second feed pipe 9. The metering valve 8 feeds cementitious materials (such as cement, fly ash, etc.) into the feed pipe 5 in a metered manner according to a set ratio, so that they initially come into contact with the slurry. The connecting component is used to control the connection between the junction chamber 41 and the discharge chamber 42. In this embodiment, the junction chamber 41 is located above the discharge chamber 42. The connecting component includes a connecting valve 10, which is installed at the bottom outlet of the junction chamber 41. When the connecting valve 10 is opened, the mixed slurry (including newly entered slurry and return slurry) in the junction chamber 41 flows into the discharge chamber 42 below by gravity.

[0023] The fluid retention assembly includes a discharge mechanism and a reflux mechanism. The discharge mechanism controls the output of slurry in the discharge chamber 42, and the reflux mechanism transports the remaining slurry in the discharge chamber 42 to the confluence chamber 41. In this embodiment, the discharge mechanism includes a three-way proportional valve 11, which is located at the discharge port of the mixing tank 4 (the discharge port is located at the bottom of the discharge chamber 42). The three-way proportional valve 11 has one inlet and two outlets. The inlet is connected to the discharge chamber 42, one outlet is used to discharge the finished fluidized solidified soil, and the other outlet is connected to the reflux mechanism. The reflux mechanism includes a reflux pump 12. The return pipe 13 and the return nozzle 14 are connected. The inlet of the return pump 12 is connected to the return outlet of the three-way proportional valve 11, and the outlet of the return pump 12 is connected to the return pipe 13. The end of the return pipe 13 is connected to the return nozzle 14, which is inclinedly inserted into the feed pipe 5 and extends into the confluence cavity 41. The inclination angle of the return nozzle 14 is 30° to 75°, and 45° is preferred in this embodiment. In actual use, the return pipe 13 can be configured as a bent pipe structure or an annular pipe structure (in the attached drawings of the specification, the return pipe 13 is a bent pipe structure) to increase the uniformity of the flow path.

[0024] The rotating cleaning assembly includes a drive mechanism and a scraping mechanism. The drive mechanism drives the scraping mechanism to move. The scraping mechanism is located in the junction cavity 41 and is used to scrape off the deposits on the sidewalls of the junction cavity 41. In this embodiment, the drive mechanism includes a drive motor 15, a reducer 16, and a transmission rod 17. The scraping mechanism includes elastic scrapers 18. The reducer 16 is installed on the top of the mixing tank 4. The output shaft of the drive motor 15 is connected to the reducer 16, and the output shaft of the reducer 16 is connected to the transmission rod 17. The transmission rod 17 is vertically located at the center of the junction cavity 41 and extends downward. Several elastic scrapers 18 are arranged around the transmission rod 17. Each elastic scraper 18 includes a connecting rod and a scraper blade. The connecting rod of the elastic scraper 18 is inserted into the transmission rod 17. The connecting rod of the elastic scraper 18 and the vibrating piston are also connected. The output ends of cylinders 26 are interconnected, and in this embodiment there are three cylinders evenly distributed circumferentially. There is a small gap (0.5-1mm) between the outer edge of the elastic scraper 18 and the inner wall of the confluence cavity 41. The drive motor 15 drives the transmission rod 17 to rotate at low speed through the reducer 16, and the elastic scraper 18 rotates accordingly to continuously scrape the side wall of the confluence cavity 41 to prevent material adhesion. The vibration mixing assembly includes an impact energy storage mechanism, a vibration mechanism, and a discharge mechanism. The impact energy storage mechanism is set in the confluence cavity 41 and is used to receive the jet kinetic energy of the newly entered slurry and the return slurry and compress air. The vibration mechanism is driven by the air compressed by the impact energy storage mechanism and is used to drive the scraping mechanism to vibrate. The discharge mechanism is used to use the gas discharged by the vibration mechanism to agitate and mix the slurry in the confluence cavity 41.

[0025] The impact energy storage mechanism includes a mounting sleeve 19, a helical spring 20, an arc-shaped plate 21, a linkage rod 22, a piston block 23, a cylinder 24, and a gas cylinder 25. The mounting sleeve 19 is fixed to the top of the junction cavity 41 and is sleeved on the outside of the transmission rod 17 (it will not rotate with the transmission rod 17). A bearing is provided between the mounting sleeve 19 and the transmission rod 17, allowing the transmission rod 17 to rotate freely. The helical spring 20 is sleeved on the outside of the mounting sleeve 19, with its upper end fixed to the upper part of the mounting sleeve 19 and its lower end fixed to the arc-shaped plate 21. The upper side of the arc-shaped plate 21 faces the feeding direction at the bottom of the feed pipe 5. A linkage rod 22 is connected to the side of the arc-shaped plate 21 away from the return nozzle 14. The upper end of the linkage rod 22 is hinged to the arc-shaped plate 21, and the lower end of the linkage rod 22 is connected to the piston block 23 via a ball joint. The piston block 23 is slidably disposed within the cylinder 24. The cylinder 24... Fixed to the top of the junction cavity 41, the bottom of the cylinder 24 is equipped with an inlet check valve and an outlet check valve. The outlet check valve is connected to the gas cylinder 25 through a pipe. When the slurry is sprayed at high speed from the return nozzle 14, it impacts the arc plate 21. The arc plate 21 drives the linkage rod 22 and the piston block 23 to move downward, compressing the air in the cylinder 24. The air enters the gas cylinder 25 for storage through the outlet check valve. After the helical spring 20 is compressed, it provides a restoring force, causing the arc plate 21 to rebound upward. When the piston block 23 moves upward, the cylinder 24 draws in fresh air from the outside through the inlet check valve. The inlet check valve and the outlet check valve are already widely used in existing cylinders and will not be described in detail here. In this way, the slurry discharged from the feed pipe 5 (including the newly entered slurry and the return slurry) continuously impacts, and the pressure inside the gas cylinder 25 gradually increases. The gas cylinder 25 is equipped with an exhaust valve (to prevent the internal pressure of the gas cylinder 25 from being too high).

[0026] The excitation mechanism includes a vibrating piston cylinder 26; the outlet of the gas cylinder 25 is connected to a delivery pipe 30 via a rotary joint 29. The rotary joint 29 is installed at the upper end of the transmission rod 17, so that the delivery pipe 30 can rotate with the transmission rod 17 without getting tangled. The delivery pipe 30 extends downward along the transmission rod 17 and is connected to several vibrating piston cylinders 26. The number of vibrating piston cylinders 26 is the same as the number of elastic scrapers 18 (3 in this embodiment). Each vibrating piston cylinder 26 corresponds to one elastic scraper 18. The cylinder body of the vibrating piston cylinder 26 is fixed to the transmission rod 17. Compressed air in the gas cylinder 25 enters the vibrating piston cylinder 26 through the delivery pipe 30, driving the piston of the vibrating piston cylinder 26 to reciprocate. The piston of the vibrating piston cylinder 26 continuously drives the elastic scraper 18 to move, causing the elastic scraper 18 to generate high-frequency vibration, thereby shaking off and scraping off the deposits attached to the inner wall of the junction cavity 41.

[0027] The discharge mechanism includes a connecting pipe 27 and a pressure relief valve 28. The exhaust port of each vibrating piston cylinder 26 is connected to the connecting pipe 27. In this embodiment, the exhaust port of the vibrating piston cylinder 26 is located on the piston of the vibrating piston cylinder 26 (as shown in the attached specification). Figure 13 As shown), the connecting pipe 27 is arranged along the connecting rod of the elastic scraper 18 and is connected to several pressure relief valves 28. The compressed air (with reduced pressure) discharged from the vibrating piston cylinder 26 is delivered to each pressure relief valve 28 through the connecting pipe 27. After the pressure relief valve 28 is opened, it releases a high-speed airflow, which disturbs the slurry in the confluence chamber 41 and promotes the mixing of mud, cementitious materials and return slurry. In actual use, the pressure relief valve 28 can be set as an electromagnetically controlled one-way valve or an adjustable pressure valve to control the intensity of airflow release.

[0028] Working principle: Start the mud pump 6 to transport the waste drilling mud in the mud storage tank 2 to the junction chamber 41 of the mixing tank 4 through the feed pipe 7 and feed pipe 5; at the same time, open the metering valve 8 to meterly transport the cementitious material in the cementitious material storage tank 3 to the junction chamber 41 through the feed pipe 9 and feed pipe 5; the mud and cementitious material make initial contact in the feed pipe 5 and then enter the junction chamber 41; When the reflux pump 12 is turned on, the three-way proportional valve 11 transports part of the slurry in the discharge chamber 42 to the reflux nozzle 14 through the reflux pipe 13. The reflux nozzle 14 injects the reflux slurry into the confluence chamber 41 at a high speed at an inclination angle of 30° to 75°. The pre-mixed slurry discharged from the feed pipe 5 impacts the arc-shaped plate 21. The arc-shaped plate 21 drives the linkage rod 22 and piston block 23 to move downwards, compressing the air in the cylinder 24. The air enters the gas cylinder 25 for storage through the outlet check valve. The spiral spring 20 resets, causing the arc-shaped plate 21 to rebound. When the piston block 23 moves upwards, the cylinder 24 draws in air through the inlet check valve. Since the output flow rate in the discharge chamber needs to be adjusted according to the construction conditions during actual use, the "return flow rate (return flow rate accounts for 10% to 8% of the total flow rate)" is used. The "0%", "slurry input", and "cementing material input" all need to be adjusted in real time according to the actual situation. Therefore, the output of the feed pipe 5 is also changing in real time. As the output changes, the impact force of the slurry on the arc plate 21 also changes in real time. The spiral spring 20 only needs to ensure that the arc plate 21 can be reset when the backflow flow rate accounts for less than 40% of the total flow rate. At this time, it can be ensured that the pressure inside the gas cylinder 25 will gradually increase when the slurry continuously impacts the arc plate 21. Compressed air in cylinder 25 enters each vibrating piston cylinder 26 through rotary joint 29 and delivery pipe 30, driving the piston of vibrating piston cylinder 26 to reciprocate and impact the corresponding elastic scraper 18, causing the elastic scraper 18 to generate high-frequency vibration; the elastic scraper 18 rotates at low speed under the drive of transmission rod 17 while superimposing high-frequency vibration, effectively scraping off the attached material on the side wall of the junction cavity 41. The gas discharged from the vibrating piston cylinder 26 is transported to the pressure relief valve 28 through the connecting pipe 27. The pressure relief valve 28 releases a high-speed airflow to disturb the slurry in the confluence chamber 41 and promote the mixing of mud, cementitious materials and return slurry. After the slurry in the confluence chamber 41 is mixed evenly, the connecting valve 10 is opened, allowing the mixed slurry to enter the discharge chamber 42 by gravity. Adjust the opening of the three-way proportional valve 11 to control the output flow rate and return flow rate of the slurry in the discharge chamber 42 (the return flow rate accounts for 10% to 80% of the total flow rate), so that the slurry in the mixing tank 4 remains in a continuous flow state and avoids sedimentation and local dead zones. Finally, the qualified fluidized solidified soil is discharged from the outlet of the three-way proportional valve 11 to complete the preparation.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preparing fluidized solidified soil based on waste drilling mud, characterized in that, include: The frame is equipped with a mud storage tank, a cementitious material storage tank and a mixing tank. The mixing tank includes a confluence chamber and a discharge chamber, and a feed pipe is provided at the top of the confluence chamber. The conveying assembly includes a mud conveying mechanism and a cementing material conveying mechanism. The mud conveying mechanism is used to convey mud from the mud storage tank to the manifold, and the cementing material conveying mechanism is used to convey cementing material from the cementing material storage tank to the manifold. A connecting component, the connecting component being used to control the connection between the junction cavity and the discharge cavity; A flow retention assembly includes a discharge mechanism and a return mechanism. The discharge mechanism controls the output of slurry in the discharge chamber, and the return mechanism transports the remaining slurry in the discharge chamber to the confluence chamber. A rotary cleaning assembly includes a driving mechanism and a scraping mechanism. The driving mechanism is used to drive the scraping mechanism to move. The scraping mechanism is disposed in the junction cavity and is used to scrape off the deposits on the sidewall of the junction cavity. The excitation mixing assembly includes an impact energy storage mechanism, an excitation mechanism, and a discharge mechanism. The impact energy storage mechanism is disposed in the confluence cavity and is used to receive the jet kinetic energy of the slurry and compress air. The excitation mechanism is driven by the air compressed by the impact energy storage mechanism and is used to drive the scraping mechanism to vibrate. The discharge mechanism is used to agitate and mix the slurry in the confluence cavity using the gas discharged by the excitation mechanism. The discharge mechanism includes a three-way proportional valve, and the reflux mechanism includes a reflux pump, a reflux pipe, and a reflux nozzle. The three-way proportional valve is located at the discharge port of the mixing tank. One of the outlets of the three-way proportional valve is connected to the reflux pump. The reflux pump is connected to the reflux pipe. The outlet of the reflux pipe is connected to the reflux nozzle, and the reflux nozzle is inclinedly inserted into the feed pipe. The driving mechanism includes a drive motor, a reducer, and a transmission rod. The scraping mechanism includes an elastic scraper. The reducer is located at the top of the mixing tank. The drive motor is connected to the transmission rod through the reducer. The transmission rod is located in the confluence cavity. Several elastic scrapers are arranged around the transmission rod. The elastic scrapers are used to scrape off the deposits on the sidewall of the confluence cavity. The impact energy storage mechanism includes a mounting sleeve, a helical spring, an arc-shaped plate, a linkage rod, a piston block, a cylinder, and a gas cylinder. The mounting sleeve is located at the top of the confluence cavity. The two ends of the helical spring are respectively connected to the mounting sleeve and the arc-shaped plate. The mounting sleeve is sleeved on the outside of the transmission rod. The helical spring and the arc-shaped plate are sleeved on the outside of the mounting sleeve. The arc-shaped plate is located below the feed pipe. A linkage rod is connected to one side of the arc-shaped plate. The linkage rod is connected to the piston block through a ball joint. The piston block is movably connected to the cylinder. The cylinder is interconnected with the gas cylinder through an air inlet check valve. The excitation mechanism includes a vibrating piston cylinder, the discharge mechanism includes a connecting pipe and a pressure relief valve, the gas cylinder is connected to a delivery pipe via a rotary joint, the delivery pipe is connected to a plurality of vibrating piston cylinders, the vibrating piston cylinders are arranged corresponding to the elastic scraper, the vibrating piston cylinders are used to drive the elastic scraper to vibrate, the exhaust end of the vibrating piston cylinder is connected to the connecting pipe, the connecting pipe is connected to a plurality of pressure relief valves, the pressure relief valves are arranged on the elastic scraper.

2. The equipment for preparing fluidized solidified soil based on waste drilling mud according to claim 1, characterized in that: The mud conveying mechanism includes a mud conveying pump and a feed pipe. The mud conveying pump is connected to the outlet of the mud storage tank, and the mud conveying pump is interconnected with the feed pipe through the feed pipe.

3. The equipment for preparing fluidized solidified soil based on waste drilling mud according to claim 2, characterized in that: The gelling material conveying mechanism includes a metering valve and a second feed pipe. The metering valve is located at the bottom of the gelling material storage tank and is connected to the feed pipe through the second feed pipe.

4. The equipment for preparing fluidized solidified soil based on waste drilling mud according to claim 1, characterized in that: The confluence chamber is located above the discharge chamber. The communication component includes a communication valve located at the bottom of the confluence chamber. Opening the communication valve connects the confluence chamber and the discharge chamber.

5. The equipment for preparing fluidized solidified soil based on waste drilling mud according to claim 1, characterized in that: The tilt angle of the return nozzle is 30° to 75°, and the return pipe is a bent pipe structure or an annular pipe structure.

6. A method of using the equipment for preparing fluidized solidified soil based on waste drilling mud according to any one of claims 1 to 5, characterized in that, Includes the following steps: A. Start the mud conveying mechanism to transport the waste drilling mud in the mud storage tank to the manifold of the mixing tank; start the cementitious material conveying mechanism to transport the cementitious material in the cementitious material storage tank to the manifold, where the mud and cementitious material initially come into contact and mix to form an initial mixed slurry. B, the connection between the junction chamber and the discharge chamber is controlled by the connecting component, so that the mixed slurry enters the discharge chamber; C. The discharge mechanism controls the output flow rate of the slurry in the discharge chamber, and the return flow mechanism controls the return flow rate to keep the slurry in the mixing tank in a continuous flow state. D, the reflux mechanism transports a portion of the slurry in the discharge chamber to the confluence chamber, and impacts the impact energy storage mechanism through the slurry jet; E, the impact energy storage mechanism receives the jet kinetic energy of the slurry in the feed pipe and compresses air. The compressed air drives the excitation mechanism, which in turn drives the scraping mechanism to vibrate and scrape off the deposits on the side wall of the confluence cavity. F, the gas discharged by the excitation mechanism is released into the confluence cavity through the discharge mechanism to turbulently mix the slurry in the confluence cavity.

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