Fracturing flow-back fluid treating and recycling device
By designing a fracturing flowback fluid treatment device that uses a rotating rod to drive a filter plate and a funnel, combined with a discharge and cleaning mechanism, the problems of high viscosity and difficult cleaning in fracturing flowback fluid treatment are solved, achieving efficient separation and resource reuse.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 绿知源(北京)环保科技有限公司
- Filing Date
- 2025-06-20
- Publication Date
- 2026-05-19
AI Technical Summary
The high viscosity of fracturing flowback fluid makes it difficult for chemical agents to diffuse, resulting in slow mass transfer and poor treatment effect. In addition, traditional equipment occupies a large area, is inconvenient to maintain, and is difficult to clean impurities from the sedimentation tank.
Design a treatment tank comprising a rotating rod, a filter plate, a guide funnel, and a sedimentation funnel, combined with a discharge and cleaning mechanism. The rotating rod drives the filter plate and funnel for preliminary filtration and sedimentation, while additives accelerate the coagulation of suspended solids, a stirring shaft promotes mixing, and a water spray pipe cleans the inner wall, achieving efficient separation and cleaning.
It improves the treatment efficiency of fracturing flowback fluid, realizes oil-water separation and resource reuse, has a compact design that is easy to maintain, has a significant cleaning effect, and reduces the footprint and environmental pollution risk.
Smart Images
Figure CN224258359U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fracturing flowback fluid reuse technology, specifically a fracturing flowback fluid treatment and reuse device. Background Technology
[0002] During the fracturing process in oilfields, a large amount of additive fluid needs to be added to the oilfield to effectively achieve the fracturing treatment. However, in order to ensure a more complete fracturing treatment, an excessive amount of additive fluid is often added to the oilfield, which results in a large amount of flowback fluid after the fracturing treatment.
[0003] Fracturing flowback fluid has a viscosity 3-10 times that of water, making it difficult for the added chemicals to diffuse within the fluid, resulting in slow mass transfer, long reaction times, and poor treatment efficiency. Furthermore, traditional fracturing flowback fluid recycling systems typically operate in separate zones, each processing stage operating independently. This leads to a large footprint, hinders maintenance, and makes it difficult to clean impurities from the sedimentation tank after fracturing flowback fluid processing. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a fracturing flowback fluid treatment and reuse device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a fracturing flowback fluid treatment and reuse device, comprising a treatment tank, a rotating rod rotatably mounted in the middle of the treatment tank, the top of the rotating rod penetrating the treatment tank and extending to the top of the treatment tank, and a driving mechanism for driving the rotating rod being provided at the top of the treatment tank; a filter plate, a guide funnel, and a sedimentation funnel being arranged sequentially from top to bottom inside the treatment tank; the filter plate being fixedly sleeved on the outer wall of the rotating rod, and the outer edge of the filter plate abutting against the inner wall of the treatment tank; the guide funnel being fixedly mounted on the inner wall of the treatment tank; an annular baffle being fixedly connected to the bottom wall of the treatment tank; the top of the sedimentation funnel connecting to the top of the annular baffle and being fixedly connected to the annular baffle; a discharge pipe communicating at the middle position of the bottom of the sedimentation funnel, the discharge pipe penetrating the treatment tank and extending to the bottom of the treatment tank; and a cleaning mechanism for cleaning the filter plate, the guide funnel, and the sedimentation funnel, and a discharge mechanism for discharging additives into the sedimentation funnel being provided on the rotating rod.
[0006] Furthermore, the rotating rod has an inner cavity, and a limiting ring is fixedly connected inside the inner cavity. The limiting ring divides the inner cavity into a water storage cavity and a material storage cavity. A guide pipe is fixedly connected to the middle of the limiting ring, and the guide pipe extends through the rotating rod to the outside of the processing tank.
[0007] Furthermore, the discharge mechanism includes multiple discharge pipes staggered on the outer wall of the rotating rod, and all the discharge pipes are located above the guide funnel, all the discharge pipes are fixedly connected to the rotating rod, and all the discharge pipes are connected to the storage chamber.
[0008] Furthermore, the cleaning mechanism includes multiple water spray pipes fixed on both sides of the rotating rod, and all of the water spray pipes are connected to the water storage chamber. The water spray pipes are located below the filter plate, and multiple nozzles are provided on both the upper and lower sides of the water spray pipes. The multiple nozzles are evenly arranged along the length of the water spray pipes.
[0009] Furthermore, all the discharge pipes are inclined downwards, and a one-way valve is provided at the output end of all the discharge pipes.
[0010] Furthermore, a stirring shaft is fixedly connected to the bottom of the rotating rod, the stirring shaft is located at the central axis of the sedimentation funnel, and multiple stirring rods are evenly arranged on the outside of the stirring shaft.
[0011] Furthermore, the annular baffle divides the bottom of the treatment tank into an oil storage chamber and a sewage chamber. The sewage chamber is located below the sedimentation funnel. A drain pipe for connecting the sewage chamber is provided at the bottom of the treatment tank. An oil drain pipe connected to the oil storage chamber is connected to the outer wall of the treatment tank.
[0012] Furthermore, it also includes a base, on which a support is provided, the treatment tank is mounted on the support, and the base is also provided with a sewage treatment tank, an oxidation treatment tank and a sludge filter press. The oxidation treatment tank is located below the support, and the sewage treatment tank and the sludge filter press are located on both sides of the oxidation treatment tank. The drain pipe is connected to the sewage treatment tank, and the discharge pipe is connected to the oxidation treatment tank.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. This utility model uses a discharge mechanism to transport additives such as flocculants or other chemical additives through a specific pipeline into the sedimentation funnel, where they are mixed with the waste liquid. These additives help to accelerate the coagulation and sedimentation of suspended solids, thereby promoting faster sedimentation of suspended particles and improving the treatment efficiency of the waste liquid.
[0015] 2. This utility model, through the establishment of a cleaning mechanism, delivers clean water along the inside of the water storage chamber to the inside of the spray pipe, and then sprays it out through multiple nozzles onto the bottom of the filter plate, the guide funnel, and the sedimentation funnel. As the rotating rod rotates, the water flow from the nozzles can fully cover the inner walls of the filter plate, the guide funnel, and the sedimentation funnel, effectively washing away the scale adhering to the walls. Furthermore, the design of the spray pipe gives the water flow a certain impact force upon spraying, further enhancing the cleaning effect. As the rotating rod continues to rotate, the cleaning mechanism also moves accordingly, ensuring thorough cleaning of the inner walls of the device and greatly improving the cleaning effect. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of a fracturing flowback fluid treatment and reuse device according to the present invention;
[0017] Figure 2 This is a front structural cross-sectional view of the processing tank of this utility model;
[0018] Figure 3 This is a partial cross-sectional view of the processing tank of this utility model;
[0019] Figure 4 This is a partial structural diagram of the cleaning mechanism and the discharge mechanism of this utility model.
[0020] In the diagram: 1. Treatment tank; 2. Rotating rod; 3. Filter plate; 4. Guide funnel; 5. Sedimentation funnel; 6. Discharge pipe; 7. Cleaning mechanism; 8. Discharge mechanism; 9. Annular baffle; 10. Base; 11. Support; 12. Wastewater treatment tank; 13. Oxidation treatment tank; 14. Sludge filter press; 15. Drain pipe; 16. Oil drain pipe; 17. Drive mechanism;
[0021] 21. Limiting ring; 22. Water storage chamber; 23. Material storage chamber; 24. Material guide pipe; 71. Water spray pipe; 72. Nozzle; 81. Discharge pipe; 82. Stirring shaft; 83. Stirring rod; 91. Oil storage chamber; 92. Wastewater chamber. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Please see Figures 1 to 4This utility model provides a fracturing flowback fluid treatment and reuse device, including a treatment tank 1. A rotating rod 2 is rotatably mounted in the middle of the treatment tank 1. The top of the rotating rod 2 passes through the treatment tank 1 and extends to the top of the treatment tank 1. A driving mechanism 17 for driving the rotating rod 2 is provided at the top of the treatment tank 1. Inside the treatment tank 1, from top to bottom, a filter plate 3, a guide funnel 4, and a sedimentation funnel 5 are arranged sequentially. The filter plate 3 is fixedly sleeved on the outer wall of the rotating rod 2, and the outer edge of the filter plate 3 abuts against the inner wall of the treatment tank 1. The funnel 4 is fixed on the inner wall of the treatment tank 1. An annular baffle 9 is fixedly connected to the bottom wall of the treatment tank 1. The top of the sedimentation funnel 5 is connected to the top of the annular baffle 9 and is fixedly connected to the annular baffle 9. A discharge pipe 6 is connected at the middle position of the bottom of the sedimentation funnel 5. The discharge pipe 6 passes through the treatment tank 1 and extends to the bottom outside the treatment tank 1. The rotating rod 2 is also equipped with a cleaning mechanism 7 for cleaning the filter plate 3, the guide funnel 4 and the sedimentation funnel 5, and a discharge mechanism 8 for discharging additives into the sedimentation funnel 5.
[0024] In use, this invention first delivers fracturing waste fluid into the treatment tank 1 through the inlet pipe. Then, a viscosity reducer is delivered into the treatment tank 1 through an inlet pipe on one side of the top. When the fracturing waste fluid enters the treatment tank 1, it first falls onto the filter plate 3. At this time, the drive mechanism 17 is activated, driving the rotating rod 2 to rotate, thereby rotating the filter plate 3. This ensures that the fracturing waste fluid is evenly distributed on the filter plate 3 and undergoes preliminary filtration through the filter holes on the filter plate 3, removing large particulate impurities. Furthermore, as the filter plate 3 rotates, the fracturing waste fluid on its surface reciprocates below the inlet pipe, ensuring that the viscosity reducer falls evenly onto the fracturing waste fluid, further accelerating the mixing of the viscosity reducer and the fracturing waste fluid. During this process, the large particulate impurities filtered out are subjected to centrifugal force as the filter plate 3 rotates, causing the large particulate impurities to be thrown onto the inner wall of the treatment tank 1 by centrifugal force, thus achieving the preliminary filtration treatment of the fracturing waste fluid.
[0025] The fracturing waste fluid, after initial filtration, then flows into guide funnel 4 and settling funnel 5. Guide funnel 4 is designed to guide the waste fluid along its inner wall into settling funnel 5. In settling funnel 5, suspended particles in the waste fluid gradually settle to the bottom due to gravity, while the clearer liquid remains on the upper layer. At this point, additives such as flocculants or other chemical additives are transported to the inside of settling funnel 5 through a specific pipeline via discharge mechanism 8, mixing with the waste fluid. These additives help accelerate the coagulation and sedimentation of suspended solids, promoting faster settling of suspended particles and improving the waste fluid treatment efficiency.
[0026] Specifically, the rotating rod 2 has an inner cavity, and a limiting ring 21 is fixedly connected inside the inner cavity. The limiting ring 21 divides the inner cavity into a water storage cavity 22 and a material storage cavity 23. A guide pipe 24 is fixedly connected in the middle of the limiting ring 21. The guide pipe 24 passes through the rotating rod 2 and extends to the outside of the processing tank 1.
[0027] The discharge mechanism 8 includes multiple discharge pipes 81 that are staggered on the outer wall of the rotating rod 2. All discharge pipes 81 are located above the guide funnel 4. All discharge pipes 81 are fixedly connected to the rotating rod 2. All discharge pipes 81 are connected to the storage chamber 23.
[0028] All discharge pipes 81 are inclined downwards, and all discharge pipes 81 are equipped with a one-way valve at their output ends.
[0029] The feed pipe 24 is connected to an external pipeline, and the feed pipe 24 and the external pipeline are movably fitted together. When the rotating rod 2 rotates under the drive mechanism 17, the external pipeline delivers the additive into the feed pipe 24. The additive falls into the storage chamber 23 through the feed pipe 24. Under the action of centrifugal force of the rotating rod 2, the additive is evenly thrown out to each discharge pipe 81 and falls from the discharge pipe 81 into the sedimentation funnel 5, flowing into the sedimentation funnel 5 along with the waste liquid. This design not only ensures the uniform addition of additives and improves the efficiency of additive addition, but also effectively avoids the waste of additives and environmental pollution, ensuring the continuity and stability of the entire treatment process.
[0030] Furthermore, a stirring shaft 82 is fixedly connected to the bottom of the rotating rod 2. The stirring shaft 82 is located at the central axis of the sedimentation funnel 5, and multiple stirring rods 83 are evenly arranged on the outside of the stirring shaft 82.
[0031] The stirring rod 83 rotates along with the rotating rod 2 to thoroughly stir the mixture of waste liquid and additives in the settling funnel 5, ensuring uniform mixing of the additives and waste liquid and accelerating the chemical reaction. Simultaneously, the design of the stirring rod 83 effectively prevents the deposition of particulate matter in the waste liquid, further improving treatment efficiency.
[0032] When the sediment in the sedimentation funnel 5 accumulates to a certain extent, the sediment can be discharged to the outside of the treatment tank 1 by opening the valve on the discharge pipe 6 for subsequent processing. It is worth noting that the drive mechanism 17 in this utility model is a combination of a motor-driven transmission gear set, and the drive mechanism 17 can be any of the existing technologies, any structure or device capable of driving the rotating rod 2 to rotate. This is existing technology, and its structure will not be described in detail here.
[0033] The annular baffle 9 allows fracturing waste fluid to slide down the inner wall of the treatment tank 1 into the guide funnel 4. The guide funnel 4 is designed so that impurities can slide down and accumulate smoothly. The annular baffle 9 divides the bottom of the treatment tank 1 into an oil storage chamber 91 and a sewage chamber 92. The sewage chamber 92 is located below the sedimentation funnel 5. The bottom of the treatment tank 1 is provided with a drain pipe 15 for connecting the sewage chamber 92. The outer wall of the treatment tank 1 is connected to an oil drain pipe 16 that communicates with the oil storage chamber 91.
[0034] The top of the annular baffle 9 connects to the top of the sedimentation funnel 5. After the waste liquid inside the sedimentation funnel 5 has settled for a period of time, it can naturally separate using density differences. At this time, the stirring shaft 82 is slowly rotated, thereby driving the stirring rod 83 to scrape off the floating oil on the surface of the waste liquid and throw it into the oil storage chamber 91. Under the guidance of the annular baffle 9, the floating oil slowly slides down the inner wall of the treatment tank 1 into the guide funnel 4, realizing efficient oil-water separation. At the same time, the connection between the oil drain pipe 16 and the oil storage chamber 91 realizes effective oil recovery and improves resource utilization. The sewage chamber 92 is located below the sedimentation funnel 5, which facilitates the reception of sewage filtered by the sedimentation funnel 5, further improving the water purification effect. The setting of the drain pipe 15 ensures that the sewage in the sewage chamber 92 can be discharged smoothly, facilitating subsequent treatment and reuse.
[0035] The cleaning mechanism 7, under the rotation of the rotating rod 2, can periodically clean the inner walls of the filter plate 3, guide funnel 4 and sedimentation funnel 5 to prevent clogging and scale buildup, and ensure the efficient and stable operation of the device.
[0036] Specifically, the cleaning mechanism 7 includes multiple water spray pipes 71 fixed on both sides of the rotating rod 2, and all water spray pipes 71 are connected to the water storage chamber 22. The water spray pipes 71 are located below the filter plate 3, and multiple nozzles 72 are provided on both the upper and lower sides of the water spray pipes 71. The multiple nozzles 72 are evenly arranged along the length of the water spray pipes 71.
[0037] After the fracturing waste fluid is treated, clean water is transported to the water storage chamber 22 through an external water pipe. The clean water then flows along the inside of the water storage chamber 22 to the spray pipe 71, and is sprayed out through multiple nozzles 72 onto the bottom of the filter plate 3, the guide funnel 4, and the sedimentation funnel 5. As the rotating rod 2 rotates, the water flow from the nozzles 72 can fully cover the inner walls of the filter plate 3, the guide funnel 4, and the sedimentation funnel 5, effectively washing away the scale adhering to the inner wall of the treatment tank 1. In addition, the design of the spray pipe 71 gives the water flow a certain impact force when sprayed, which can further enhance the cleaning effect. As the rotating rod 2 continues to rotate, the cleaning mechanism 7 also moves accordingly, ensuring a thorough cleaning of the inner wall of the device and greatly improving the cleaning effect.
[0038] It also includes a base 10, on which a support 11 is provided. The treatment tank 1 is installed on the support 11. The base 10 is also provided with a sewage treatment tank 12, an oxidation treatment tank 13 and a sludge filter press 14. The oxidation treatment tank 13 is located below the support 11. The sewage treatment tank 12 and the sludge filter press 14 are located on both sides of the oxidation treatment tank 13. The drain pipe 15 is connected to the sewage treatment tank 12 and the discharge pipe 6 is connected to the oxidation treatment tank 13.
[0039] The treatment tank 1 is securely mounted on the base 10 via a bracket 11, ensuring the stability of the entire device. A drain pipe 15 connects to a wastewater treatment tank 12, discharging treated clean water into the tank. The wastewater treatment tank 12 receives and preliminarily treats the fracturing waste fluid discharged from the treatment tank 1, achieving water resource reuse. The oxidation treatment tank 13 uses an oxidant to further treat the fracturing waste fluid, degrading organic matter through oxidation-reduction reactions and improving its reuse. The sludge filter press 14 treats the settled sludge, squeezing out water from the sludge to obtain drier sludge for subsequent processing and disposal. The entire device has a compact structure and reasonable layout, achieving efficient treatment and reuse of fracturing flowback fluid.
[0040] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fracturing flowback fluid treatment and reuse device, comprising a treatment tank (1), characterized in that, A rotating rod (2) is rotatably mounted in the middle of the treatment tank (1). The top of the rotating rod (2) passes through the treatment tank (1) and extends to the top of the outer side of the treatment tank (1). A driving mechanism (17) for driving the rotating rod (2) is provided at the top of the treatment tank (1). A filter plate (3), a guide funnel (4), and a sedimentation funnel (5) are arranged sequentially from top to bottom inside the treatment tank (1). The filter plate (3) is fixedly sleeved on the outer wall of the rotating rod (2), and the outer edge of the filter plate (3) abuts against the inner wall of the treatment tank (1). The guide funnel (4) is fixed on the inner wall of the treatment tank (1). An annular baffle (9) is fixedly connected to the bottom wall of the processing tank (1). The top of the sedimentation funnel (5) is connected to the top of the annular baffle (9) and fixedly connected to the annular baffle (9). A discharge pipe (6) is connected to the middle position of the bottom of the sedimentation funnel (5). The discharge pipe (6) extends through the processing tank (1) and extends to the bottom outside the processing tank (1). The rotating rod (2) is also equipped with a cleaning mechanism (7) for cleaning the filter plate (3), the guide funnel (4) and the sedimentation funnel (5), and a discharge mechanism (8) for discharging additives into the sedimentation funnel (5).
2. The fracturing flowback fluid treatment and reuse device according to claim 1, characterized in that, The rotating rod (2) has an inner cavity, and a limiting ring (21) is fixedly connected inside the inner cavity. The limiting ring (21) divides the inner cavity into a water storage cavity (22) and a material storage cavity (23). A guide pipe (24) is fixedly connected in the middle of the limiting ring (21). The guide pipe (24) passes through the rotating rod (2) and extends to the outside of the processing tank (1).
3. The fracturing flowback fluid treatment and reuse device according to claim 2, characterized in that, The discharge mechanism (8) includes multiple discharge pipes (81) staggered on the outer wall of the rotating rod (2), and all discharge pipes (81) are located above the guide funnel (4), all discharge pipes (81) are fixedly connected to the rotating rod (2), and all discharge pipes (81) are connected to the storage chamber (23).
4. The fracturing flowback fluid treatment and reuse device according to claim 2, characterized in that, The cleaning mechanism (7) includes multiple water spray pipes (71) fixed on both sides of the rotating rod (2), and all the water spray pipes (71) are connected to the water storage chamber (22). The water spray pipes (71) are located below the filter plate (3). Multiple nozzles (72) are provided on both the upper and lower sides of the water spray pipes (71), and the multiple nozzles (72) are evenly arranged along the length of the water spray pipes (71).
5. The fracturing flowback fluid treatment and reuse device according to claim 3, characterized in that, All of the discharge pipes (81) are inclined downwards, and a one-way valve is provided at the output end of all of the discharge pipes (81).
6. The fracturing flowback fluid treatment and reuse device according to claim 1, characterized in that, The bottom of the rotating rod (2) is fixedly connected to a stirring shaft (82), which is located at the central axis of the sedimentation funnel (5). Multiple stirring rods (83) are evenly arranged on the outside of the stirring shaft (82).
7. The fracturing flowback fluid treatment and reuse device according to claim 1, characterized in that, The annular baffle (9) divides the bottom of the treatment tank (1) into an oil storage chamber (91) and a sewage chamber (92). The sewage chamber (92) is located below the sedimentation funnel (5). The bottom of the treatment tank (1) is provided with a drain pipe (15) for connecting the sewage chamber (92). The outer wall of the treatment tank (1) is connected with an oil drain pipe (16) that communicates with the oil storage chamber (91).
8. The fracturing flowback fluid treatment and reuse device according to claim 7, characterized in that, It also includes a base (10), on which a bracket (11) is provided. The treatment tank (1) is installed on the bracket (11). The base (10) is also provided with a sewage treatment tank (12), an oxidation treatment tank (13) and a sludge filter press (14). The oxidation treatment tank (13) is located below the bracket (11). The sewage treatment tank (12) and the sludge filter press (14) are located on both sides of the oxidation treatment tank (13). The drain pipe (15) is connected to the sewage treatment tank (12), and the discharge pipe (6) is connected to the oxidation treatment tank (13).