Fracturing flow-back fluid electric flocculation hardness removal integrated equipment

Abstract

The utility model relates to the technical field of fracturing flow-back fluid treatment, and discloses fracturing flow-back fluid electric flocculation hardness removal integrated equipment which comprises a sedimentation tank, electric flocculation equipment, a discharging pipe, a valve and a discharging port, the electric flocculation equipment is installed in the middle of the top of the sedimentation tank, one end of the discharging pipe communicates with the bottom of the sedimentation tank, the valve is installed at the other end of the discharging pipe, and the discharging port is communicated with the discharging pipe. A dosing mechanism is arranged at the top of the sedimentation tank, and a stirring mechanism is arranged in the sedimentation tank. According to the electric flocculation hardness removal integrated equipment for the fracturing flow-back fluid, a hardness removal agent (sodium carbonate) is added into the sedimentation tank and stirred with the fracturing flow-back fluid through the stirring mechanism to form flocculent sediment, sediment precipitation of the fracturing flow-back fluid in the sedimentation tank is accelerated through the electric flocculation equipment, and agent adding precipitation is combined with electric flocculation precipitation; the two precipitation technologies enable the precipitation speed of impurities in the fracturing flow-back fluid to be higher and the efficiency to be higher.

Description

Technical Field

[0001] This application relates to the field of fracturing flowback fluid treatment technology, specifically to an integrated device for electrocoagulation and hardness removal of fracturing flowback fluid. Background Technology

[0002] Fracturing is a common method for enhancing oil and gas production. Fracturing flowback fluid is generated during the flowback process and has a complex and variable composition, containing crude oil, polymers, water, sand, gravel, and microorganisms. It is characterized by its complex composition, high variety, high content, high viscosity, high degree of emulsification, and difficulty in treatment. During the treatment of fracturing flowback fluid, electrocoagulation technology has a significant effect on removing suspended solids, turbidity, and chemical oxygen demand (COD).

[0003] Existing electrocoagulation integrated equipment, when treating fracturing flowback fluid, adsorbs and condenses pollutant particles in the water to form flocs through the action of electric field compression, adsorption bridging, and collection net trapping. However, it relies heavily on the action of electrodes, resulting in low treatment efficiency of fracturing flowback fluid.

[0004] Therefore, there is an urgent need for an integrated electrocoagulation and hardening removal device for fracturing flowback fluid to solve the problem of slow processing of fracturing flowback fluid by integrated electrocoagulation devices. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides an integrated electrocoagulation and hardening removal device for fracturing flowback fluid, which has the advantage of improving the treatment rate of fracturing flowback fluid and solves the problem of slow treatment efficiency of fracturing flowback fluid in integrated electrocoagulation devices.

[0006] To achieve the above objectives, this application provides the following technical solution: an integrated electrocoagulation and hardness removal device for fracturing flowback fluid, comprising a sedimentation tank, an electrocoagulation device, a discharge pipe, a valve, and a discharge port. The electrocoagulation device is installed at the top center of the sedimentation tank, one end of the discharge pipe is connected to the bottom of the sedimentation tank, the valve is installed at the other end of the discharge pipe, the discharge port is located on the front of the sedimentation tank, a dosing mechanism is provided at the top of the sedimentation tank, and a stirring mechanism is provided inside the sedimentation tank.

[0007] The dosing mechanism includes a high-pressure air pump, a feed box, a discharge valve, a connecting pipe, a support plate, and nozzles. The high-pressure air pump is installed on the top of the sedimentation tank. The feed box is fixedly connected to the top of the sedimentation tank by screws. The discharge valve is located on the top of the feed box. The high-pressure air pump is connected to the feed box through a pipe. The feed box is connected to the support plate through a connecting pipe. Several sets of nozzles are located at the bottom of the support plate.

[0008] In the sedimentation tank, a hardening agent (sodium carbonate) is added to the fracturing flowback fluid, and the mixture is stirred by a stirring mechanism to form flocculent precipitate. The fracturing flowback fluid in the sedimentation tank is then subjected to an electrocoagulation device to accelerate the sedimentation of the precipitate. The combination of chemical precipitation and electrocoagulation precipitation results in faster and more efficient sedimentation of impurities inside the fracturing flowback fluid.

[0009] Preferably, the top of the discharge valve is equipped with a feed inlet.

[0010] Preferably, the support disk has a hollow structure inside.

[0011] Preferably, several groups of the nozzles are located at the bottom of the support plate in a circular arrangement.

[0012] Preferably, the stirring mechanism includes a drive motor, a connecting rod, a connecting plate, and a stirring blade. The drive motor is installed on one side of the sedimentation tank. One end of the connecting rod is fixedly connected to the output end of the drive motor, and the other end of the connecting rod is rotatably connected to the inside of the sedimentation tank. The two ends of the connecting plate are respectively welded to one end of the stirring blade and the outer surface of the connecting rod.

[0013] Preferably, several sets of the connecting plates and stirring blades are evenly distributed on the outer surface of the connecting rod.

[0014] In summary, this application includes at least one of the following beneficial effects:

[0015] 1. This integrated electrocoagulation and hardening removal equipment for fracturing flowback fluid involves fracturing flowback fluid entering a sedimentation tank. A hardening agent (sodium carbonate) is added to the sedimentation tank, and the fracturing flowback fluid is stirred by a stirring mechanism to form flocculent precipitate. The fracturing flowback fluid in the sedimentation tank undergoes electrocoagulation to accelerate the sedimentation of the precipitate. The combination of chemical precipitation and electrocoagulation sedimentation technologies results in faster and more efficient sedimentation of impurities within the fracturing flowback fluid.

[0016] 2. This integrated electrocoagulation and hardness removal equipment for fracturing flowback fluid combines chemical precipitation with electrocoagulation precipitation. It can not only remove calcium and magnesium ions from fracturing flowback fluid, but also remove other impurities in the fracturing flowback fluid, making it more versatile. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the integrated electrocoagulation equipment of this application;

[0018] Figure 2 This is a bottom view of the integrated electrocoagulation equipment of this application;

[0019] Figure 3 This is a structural diagram of the mixing mechanism in this application;

[0020] Figure 4 This is a diagram of the internal structure of the sedimentation tank in this application.

[0021] The components are as follows: 1. Sedimentation tank; 111. High-pressure air pump; 112. Feed box; 113. Discharge valve; 114. Connecting pipe; 115. Support plate; 116. Nozzle; 117. Feed inlet; 2. Electrocoagulation equipment; 211. Drive motor; 212. Connecting rod; 213. Connecting plate; 214. Stirring blade; 3. Discharge pipe; 4. Valve; 5. Discharge port. Detailed Implementation

[0022] 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 of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] Please see Figure 1-4 An integrated electrocoagulation and hardness removal device for fracturing flowback fluid includes a sedimentation tank 1, an electrocoagulation device 2, a discharge pipe 3, a valve 4, and a discharge port 5. The fracturing flowback fluid is introduced into the sedimentation tank 1 through a slot on the back side. The electrocoagulation device 2 is installed at the top center of the sedimentation tank 1. When the electrocoagulation device 2 is started, it removes impurities from the fracturing flowback fluid. One end of the discharge pipe 3 is connected to the bottom of the sedimentation tank 1, and the valve 4 is installed at the other end of the discharge pipe 3. When the valve 4 is opened, the sediment is discharged from the discharge pipe 3. The discharge port 5 is located on the front of the sedimentation tank 1, and the treated fracturing flowback fluid is discharged from the discharge port 5. A dosing mechanism is provided at the top of the sedimentation tank 1, and a stirring mechanism is provided inside the sedimentation tank 1.

[0024] Specifically, the dosing mechanism includes a high-pressure air pump 111, a feed box 112, a discharge valve 113, a connecting pipe 114, a support plate 115, and nozzles 116. The high-pressure air pump 111 is installed on the top of the sedimentation tank 1. The feed box 112 is fixedly connected to the top of the sedimentation tank 1 with screws. The discharge valve 113 is located on the top of the feed box 112. The high-pressure air pump 111 is connected to the feed box 112 through a pipe. The feed box 112 is connected to the support plate 115 through the connecting pipe 114. The support plate 115 has a hollow internal structure. Several sets of nozzles 116 are located at the bottom of the support plate 115 and are arranged in a circular pattern. The discharge valve 113 has a feed inlet 117 installed on its top.

[0025] Through the above technical solution, the de-hardening agent (sodium carbonate) is introduced into the discharge valve 113 through the feed inlet 117. The discharge valve 113 and the high-pressure air pump 111 are started. When the discharge valve 113 is started, the de-hardening agent (sodium carbonate) is added into the feed box 112. The high-pressure air pump 111 introduces external air into the feed box 112. The air carries the de-hardening agent (sodium carbonate) into the support plate 115 through the connecting pipe 114. The air carrying the de-hardening agent (sodium carbonate) is discharged from the nozzle 116 and enters the fracturing flowback fluid in the sedimentation tank 1 to treat the impurities in the fracturing flowback fluid. The combination of chemical precipitation and electrocoagulation precipitation makes the sedimentation speed of impurities in the fracturing flowback fluid faster and more efficient.

[0026] Specifically, the stirring mechanism includes a drive motor 211, a connecting rod 212, a connecting piece 213, and a stirring blade 214. The drive motor 211 is installed on one side of the sedimentation tank 1. One end of the connecting rod 212 is fixedly connected to the output end of the drive motor 211, and the other end of the connecting rod 212 is rotatably connected to the inside of the sedimentation tank 1. The two ends of the connecting piece 213 are respectively welded to one end of the stirring blade 214 and the outer surface of the connecting rod 212. Several sets of connecting pieces 213 and stirring blades 214 are evenly distributed on the outer surface of the connecting rod 212.

[0027] With the above technical solution, when the de-hardening agent (sodium carbonate) is incorporated into the fracturing flowback fluid, the drive motor 211 is started. The drive motor 211 drives the connecting rod 212 to rotate. When the connecting rod 212 rotates, it drives the stirring blade 214 to rotate through the connecting plate 213. When the stirring blade 214 rotates, it stirs the fracturing flowback fluid, allowing the de-hardening agent (sodium carbonate) and the fracturing flowback fluid to mix thoroughly, thereby improving the treatment efficiency of the fracturing flowback fluid.

[0028] During use, a hardening agent (sodium carbonate) is added to the sedimentation tank 1, and fracturing flowback fluid is stirred by the stirring mechanism to form flocculent precipitate. The fracturing flowback fluid in the sedimentation tank 1 is accelerated to settle by the electrocoagulation device 2. The combination of chemical precipitation and electrocoagulation precipitation makes the internal impurities of the fracturing flowback fluid settle faster and more efficiently.

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

Claims

1. An integrated electrocoagulation and hardening removal device for fracturing flowback fluid, comprising a sedimentation tank (1), an electrocoagulation device (2), a discharge pipe (3), a valve (4), and a discharge port (5), characterized in that: The electrocoagulation device (2) is installed at the top middle position of the sedimentation tank (1), one end of the discharge pipe (3) is connected to the bottom of the sedimentation tank (1), the valve (4) is installed at the other end of the discharge pipe (3), the discharge port (5) is set on the front of the sedimentation tank (1), a dosing mechanism is set on the top of the sedimentation tank (1), and a stirring mechanism is set inside the sedimentation tank (1). The dosing mechanism includes a high-pressure air pump (111), a feed box (112), a discharge valve (113), a connecting pipe (114), a support plate (115), and nozzles (116). The high-pressure air pump (111) is installed on the top of the sedimentation tank (1). The feed box (112) is fixedly connected to the top of the sedimentation tank (1) by screws. The discharge valve (113) is located on the top of the feed box (112). The high-pressure air pump (111) is connected to the feed box (112) through a pipe. The feed box (112) is connected to the support plate (115) through the connecting pipe (114). Several sets of nozzles (116) are located at the bottom of the support plate (115).

2. The integrated electrocoagulation and hardness removal equipment for fracturing flowback fluid according to claim 1, characterized in that: The top of the discharge valve (113) is equipped with a feed inlet (117).

3. The integrated electrocoagulation and hardness removal equipment for fracturing flowback fluid according to claim 1, characterized in that: The support plate (115) has a hollow structure inside.

4. The integrated electrocoagulation and hardness removal equipment for fracturing flowback fluid according to claim 1, characterized in that: Several sets of nozzles (116) are located at the bottom of the support plate (115) in a circular arrangement.

5. The integrated electrocoagulation and hardness removal equipment for fracturing flowback fluid according to claim 1, characterized in that: The stirring mechanism includes a drive motor (211), a connecting rod (212), a connecting piece (213), and a stirring blade (214). The drive motor (211) is installed on one side of the sedimentation tank (1). One end of the connecting rod (212) is fixedly connected to the output end of the drive motor (211), and the other end of the connecting rod (212) is rotatably connected to the inside of the sedimentation tank (1). The two ends of the connecting piece (213) are respectively welded to one end of the stirring blade (214) and the outer surface of the connecting rod (212).

6. The integrated electrocoagulation and hardness removal equipment for fracturing flowback fluid according to claim 5, characterized in that: Several sets of connecting plates (213) and stirring blades (214) are evenly distributed on the outer surface of the connecting rod (212).

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