A fracturing flowback fluid flocculation sedimentation tank

Abstract

This utility model discloses a fracturing flowback fluid flocculation sedimentation tank, relating to the field of fracturing flowback fluid flocculation sedimentation technology. It includes: a tank body, an inlet, a dosing port, a sludge discharge port, and a servo motor. The inlet and dosing port are located at the top of the tank body, and the sludge discharge port is located at the bottom center of the tank body. The servo motor is fixedly located at the upper center of the tank body, and its drive rod passes downward through the top center of the tank body and enters the interior of the tank body. A first conical guide plate and a second conical guide plate are fixedly mounted on the drive rod, with the dosing port pointing towards the first conical guide plate and the inlet pointing towards the second conical guide plate. By fixing the first and second conical guide plates on the drive rod, corresponding to the dosing port and the inlet respectively, this application allows the flocculant and fracturing flowback fluid to smoothly enter the tank body. Simultaneously, the two guide plates rotate together with the drive rod, improving the stability of flocculation sedimentation.

Description

Technical Field

[0001] This application relates to the field of fracturing flowback fluid flocculation and sedimentation technology, and in particular to a fracturing flowback fluid flocculation and sedimentation tank. Background Technology

[0002] During oil and gas extraction, fracturing operations generate a large amount of flowback fluid, which has a complex composition and high suspended solids content. Direct discharge or reuse of this fluid would cause serious environmental pollution and affect process safety. Flocculation and sedimentation technology is a key step in flowback fluid treatment. By adding flocculants, suspended solids are coagulated and settled, thereby achieving solid-liquid separation. Therefore, research on fracturing flowback fluid flocculation and sedimentation tanks is necessary.

[0003] In the prior art, Chinese patent CN221917597U discloses a stratified effluent flocculation sedimentation tank, including a horizontally shaped flocculation sedimentation tank body. An inlet is provided at either end of the flocculation sedimentation tank body, and an inlet pipe for injecting fracturing flowback fluid into the flocculation sedimentation tank body is fixedly installed at the inlet. A dosing pipe is provided at the top of the flocculation sedimentation tank body and near the outlet of the inlet pipe. Multiple agitators are spaced apart along the length of the top of the flocculation sedimentation tank body, and multiple sludge discharge ports for discharging bottom sludge are spaced apart at the bottom of the flocculation sedimentation tank body. At the same time, a stratified effluent system for discharging clarified water is provided at the other end of the flocculation sedimentation tank body opposite to the inlet.

[0004] However, the aforementioned existing technologies do not take into account the instability and uneven distribution of the fluid when the flocculant and fracturing flowback fluid enter the tank, resulting in poor stability of flocculation and sedimentation. Utility Model Content

[0005] This application provides a fracturing flowback fluid flocculation sedimentation tank to solve the problem that the existing technology does not consider the unstable and uneven distribution of the fluid when the flocculant and fracturing flowback fluid enter the tank, resulting in poor stability of flocculation sedimentation.

[0006] On the one hand, this application provides a fracturing flowback fluid flocculation sedimentation tank, including: a tank body, a liquid inlet, a chemical dosing port, a sludge discharge port, and a servo motor.

[0007] The liquid inlet and the dosing port are located at the top of the tank, and the sludge discharge port is located at the center of the bottom of the tank.

[0008] The servo motor is fixedly mounted at the center of the upper side of the tank, and the transmission rod of the servo motor passes downward through the center of the top of the tank and enters the interior of the tank.

[0009] The transmission rod is fixedly equipped with a first conical guide plate and a second conical guide plate, the dosing port points to the first conical guide plate, and the liquid inlet points to the second conical guide plate.

[0010] In one possible implementation, the bottom of the tank is inverted conical.

[0011] In one possible implementation, a first drain outlet is provided on the bottom side of the tank, and a second drain outlet is provided on the side wall of the tank.

[0012] In one possible implementation, a first filter screen is fixedly installed at the inlet of the first drain outlet, and a second filter screen is fixedly installed at the inlet of the second drain outlet.

[0013] In one possible implementation, the first drain outlet and the second drain outlet are respectively connected to a first drain pump and a second drain pump via pipes.

[0014] The pipes of the first drain outlet and the second drain outlet are respectively connected to the first backwash pump and the second backwash pump through branch pipes.

[0015] In one possible implementation, several drug delivery ports are provided, and the several drug delivery ports are evenly distributed around the servo motor.

[0016] In one possible implementation, the top of the tank is provided with an overflow port.

[0017] In one possible implementation, the first conical guide plate is located above the second conical guide plate, and the radius of the first conical guide plate is smaller than the radius of the second conical guide plate.

[0018] In one possible implementation, a plurality of transverse stirring rods are fixedly disposed on the side of the transmission rod, and the plurality of transverse stirring rods are distributed between the first conical guide plate and the second conical guide plate, and / or below the second conical guide plate.

[0019] The fracturing flowback fluid flocculation sedimentation tank of this application has the following advantages:

[0020] By fixing a first conical guide plate and a second conical guide plate on the transmission rod, corresponding to the dosing port and the liquid inlet respectively, the flocculant and fracturing flowback fluid come into contact with the first and second conical guide plates immediately, rather than directly impacting the fluid inside the tank. This allows them to enter the tank smoothly. Simultaneously, the two guide plates rotate with the transmission rod, ensuring the flocculant and fracturing flowback fluid are evenly dispersed. All these factors combined improve the stability of flocculation and sedimentation.

[0021] The proposed first and second drainage outlets can flexibly discharge clarified water from different layers according to water quality requirements.

[0022] The proposed first and second filters can filter the discharged clarified water, preventing incompletely flocculated sediment from being discharged through the drain outlet.

[0023] The proposed first and second drain outlets are connected to a first backwash pump and a second backwash pump respectively via branch pipes, which can backwash the filter screen when the first and second drain outlets are blocked, thus improving drainage efficiency.

[0024] The proposed method involves several dosing ports evenly distributed around the servo motor, which enables uniform dosing.

[0025] The proposed tank is equipped with an overflow port at the top, which improves the safety of flocculation and sedimentation.

[0026] The proposed first conical guide plate is located above the second conical guide plate. The radius of the first conical guide plate is smaller than that of the second conical guide plate, which makes it easier to point the dosing port towards the first conical guide plate and the liquid inlet towards the second conical guide plate.

[0027] Several transverse stirring rods are distributed between the first and second conical guide plates, and / or below the second conical guide plate. The transverse stirring rods cooperate with the two guide plates to carry out stirring together, thereby improving the stirring effect. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional structural diagram of a fracturing flowback fluid flocculation sedimentation tank provided in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Tank body, 11-Liquid inlet, 12-Dosing port, 13-Sludge discharge port, 2-Servo motor, 21-Transmission rod, 22-First conical guide plate, 23-Horizontal stirring rod, 24-Second conical guide plate, 14-First drain outlet, 141-First filter screen, 142-First drain pump, 143-First backflushing pump, 15-Second drain outlet, 151-Second filter screen, 152-Second drain pump, 153-Second backflushing pump, 16-Overflow port. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] like Figure 1 As shown in the figure, this application provides a fracturing flowback fluid flocculation sedimentation tank, including: tank body 1, inlet 11, dosing port 12, sludge discharge port 13, and servo motor 2.

[0034] The liquid inlet 11 and the dosing port 12 are located at the top of the tank body 1, and the sludge discharge port 13 is located at the bottom center of the tank body 1.

[0035] The servo motor 2 is fixedly installed at the upper center of the tank body 1, and the transmission rod 21 of the servo motor 2 passes downward through the top center of the tank body 1 and enters the interior of the tank body 1.

[0036] The transmission rod 21 is fixedly provided with a first conical guide plate 22 and a second conical guide plate 24. The dosing port 12 points to the first conical guide plate 22, and the liquid inlet 11 points to the second conical guide plate 24.

[0037] Specifically, in this embodiment, the inlet 11 is used to introduce fracturing flowback fluid into the tank 1, the dosing port 12 is used to introduce flocculant into the tank 1, and the sludge discharge port 13 is used to discharge the sediment after flocculation and sedimentation. The servo motor 2 drives the first conical guide plate 22 and the second conical guide plate 24 to rotate via the transmission rod 21, thereby uniformly dispersing the flocculant and fracturing flowback fluid, respectively.

[0038] For example, the bottom of the tank 1 is inverted conical.

[0039] For example, a first drain outlet 14 is provided on the bottom side of the tank body 1, and a second drain outlet 15 is provided on the side wall of the tank body 1.

[0040] Specifically, the two drain outlets at different heights are provided to flexibly discharge different layers of clarified water according to water quality requirements. In other possible embodiments, other numbers and heights of drain outlets can be provided as needed.

[0041] For example, a first filter screen 141 is fixedly provided at the inlet of the first drain outlet 14, and a second filter screen 151 is fixedly provided at the inlet of the second drain outlet 15.

[0042] Specifically, the filter screen is used to filter the discharged clarified water to prevent unflocculated sediment from being discharged through the drain outlet.

[0043] For example, the first drain outlet 14 and the second drain outlet 15 are respectively connected to a first drain pump 142 and a second drain pump 152 via pipes.

[0044] The pipes of the first drain outlet 14 and the second drain outlet 15 are respectively connected to the first backwash pump 143 and the second backwash pump 153 through branch pipes.

[0045] Specifically, in this embodiment, when drainage is required, the first backwash pump 143 and the second backwash pump 153 are turned off, and the first drain pump 142 and the second drain pump 152 are turned on, allowing clear water to flow from the drain outlet towards the drain pumps. When the drainage speed is slow, it is determined that the filter screen is clogged, so the first drain pump 142 and the second drain pump 152 are turned off, and the first backwash pump 143 and the second backwash pump 153 are turned on, allowing external clean water to flush the filter screen from the backwash pumps towards the drain outlet. In other possible embodiments, the first drain pump 142, the second drain pump 152, the first backwash pump 143, and the second backwash pump 153 can be turned on and off as needed.

[0046] For example, a plurality of drug delivery ports 12 are provided, and the plurality of drug delivery ports 12 are evenly distributed around the servo motor 2.

[0047] Specifically, in this embodiment, four dosing ports 12 are provided, which can simultaneously add flocculant to the four dosing ports 12 during the flocculation and sedimentation process to achieve uniform dosing.

[0048] For example, the top of the tank 1 is provided with an overflow port 16.

[0049] Specifically, the overflow port 16 can prevent safety accidents caused by excessive fracturing flowback fluid and improve the safety of flocculation and sedimentation.

[0050] For example, the first conical guide plate 22 is located above the second conical guide plate 24, and the radius of the first conical guide plate 22 is smaller than the radius of the second conical guide plate 24.

[0051] Specifically, in this embodiment, by setting the position and size of the first conical guide plate 22 and the second conical guide plate 24, it is convenient to point the drug inlet 12 toward the first conical guide plate 22 and the liquid inlet 11 toward the second conical guide plate 24.

[0052] For example, a plurality of transverse stirring rods 23 are fixedly provided on the side of the transmission rod 21, and the plurality of transverse stirring rods 23 are distributed between the first conical guide plate 22 and the second conical guide plate 24, and / or below the second conical guide plate 24.

[0053] Specifically, in this embodiment, six transverse stirring rods 23 are provided, two of which are distributed at different heights between the first conical guide plate 22 and the second conical guide plate 24, and four are distributed at different heights below the second conical guide plate 24. In other possible embodiments, other numbers and heights of transverse stirring rods 23 may also be provided.

[0054] Specifically, in this embodiment, the working principle of the fracturing flowback fluid flocculation sedimentation tank is as follows: In the initial state, the first drainage pump 142, the second drainage pump 152, the first backflushing pump 143, and the second backflushing pump 153 are all closed, and the valve of the sludge discharge port 13 is closed; firstly, fracturing flowback fluid is introduced into the tank body 1 through the inlet 11, and the servo motor 2 is turned on. The servo motor 2 drives the first conical guide plate 22, the second conical guide plate 24, and the transverse stirring rod 23 to rotate through the transmission rod 21. During the stirring process, the fluid is introduced from the dosing port. 12. Flocculant is introduced into the tank 1. After a period of time, the servo motor 2 is turned off and the stirring is stopped. Wait for the flocculation and sedimentation reaction inside the tank 1. When the floc sediment layer of the sedimentation reaction drops below the second drain outlet 15, the second drain pump 152 is turned on to drain the water. When the floc sediment layer drops below the first drain outlet 14, the first drain pump 142 is turned on to drain the water. After the drainage is completed, the second drain pump 152 and the first drain pump 142 are turned off, and the valve of the sludge discharge outlet 13 is opened to discharge the sediment.

[0055] In this embodiment, a first conical guide plate 22 and a second conical guide plate 24 are fixedly mounted on the transmission rod 21, corresponding to the dosing port 12 and the liquid inlet 11, respectively. This allows the flocculant and fracturing flowback fluid to contact the first conical guide plate 22 and the second conical guide plate 24 immediately, rather than directly impacting the fluid inside the tank. This ensures a smooth entry into the tank 1. Simultaneously, the two guide plates rotate with the transmission rod 21, uniformly dispersing the flocculant and fracturing flowback fluid. All these factors combined improve the stability of flocculation and sedimentation.

[0056] The proposed first drain outlet 14 and second drain outlet 15 can flexibly discharge clarified water from different layers according to water quality requirements.

[0057] The proposed first filter screen 141 and second filter screen 151 can filter the discharged clarified water and prevent incompletely flocculated sediment from being discharged through the drain outlet.

[0058] The pipes of the first drain outlet 14 and the second drain outlet 15 are respectively connected to the first backwash pump 143 and the second backwash pump 153 through branch pipes, which can backwash the filter screen when the first drain outlet 14 and the second drain outlet 15 are blocked, thereby improving the drainage efficiency.

[0059] The proposed multiple drug delivery ports 12 are evenly distributed around the servo motor 2, which can achieve uniform drug delivery.

[0060] The proposed tank 1 is equipped with an overflow port 16 at the top, which improves the safety of flocculation and sedimentation.

[0061] The proposed first conical guide plate 22 is located above the second conical guide plate 24. The radius of the first conical guide plate 22 is smaller than the radius of the second conical guide plate 24, which makes it easier to point the dosing port 12 toward the first conical guide plate 22 and the liquid inlet 11 toward the second conical guide plate 24.

[0062] Several transverse stirring rods 23 are distributed between the first conical guide plate 22 and the second conical guide plate 24, and / or below the second conical guide plate 24. The transverse stirring rods 23 cooperate with the two guide plates to carry out stirring together, thereby improving the stirring effect.

[0063] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0064] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A fracturing flowback fluid flocculation sedimentation tank, characterized in that, include: Tank body, liquid inlet, chemical dosing port, sludge discharge port, servo motor; The liquid inlet and the dosing port are located at the top of the tank, and the sludge discharge port is located at the center of the bottom of the tank. The servo motor is fixedly installed at the center of the upper side of the tank, and the transmission rod of the servo motor passes downward through the center of the top of the tank and enters the interior of the tank; The transmission rod is fixedly equipped with a first conical guide plate and a second conical guide plate, the dosing port points to the first conical guide plate, and the liquid inlet points to the second conical guide plate.

2. The fracturing flowback fluid flocculation sedimentation tank according to claim 1, characterized in that, The bottom of the tank is inverted cone shape.

3. The fracturing flowback fluid flocculation sedimentation tank according to claim 2, characterized in that, The bottom side of the tank is provided with a first drain outlet, and the side wall of the tank is provided with a second drain outlet.

4. A fracturing flowback fluid flocculation sedimentation tank according to claim 3, characterized in that, A first filter screen is fixedly installed at the inlet of the first drain outlet, and a second filter screen is fixedly installed at the inlet of the second drain outlet.

5. A fracturing flowback fluid flocculation sedimentation tank according to claim 4, characterized in that, The first drain outlet and the second drain outlet are respectively connected to the first drain pump and the second drain pump via pipes; The pipes of the first drain outlet and the second drain outlet are respectively connected to the first backwash pump and the second backwash pump through branch pipes.

6. A fracturing flowback fluid flocculation sedimentation tank according to claim 1, characterized in that, The dosing port is provided in several places, and the several dosing ports are evenly distributed around the servo motor.

7. A fracturing flowback fluid flocculation sedimentation tank according to claim 1, characterized in that, An overflow port is provided at the top of the tank.

8. A fracturing flowback fluid flocculation sedimentation tank according to claim 1, characterized in that, The first conical guide plate is located above the second conical guide plate, and the radius of the first conical guide plate is smaller than the radius of the second conical guide plate.

9. A fracturing flowback fluid flocculation sedimentation tank according to claim 1, characterized in that, A plurality of transverse stirring rods are fixedly provided on the side of the transmission rod, and the plurality of transverse stirring rods are distributed between the first conical guide plate and the second conical guide plate, and / or below the second conical guide plate.

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