Fracturing flow-back fluid multi-stage cyclone desanding device

Abstract

The utility model discloses a fracturing flow-back fluid multistage cyclone desanding device which comprises a processing support, a plurality of filter tanks are arranged on the processing support, the filter tanks are installed on the processing support in a step shape, filter rollers are arranged on the inner sides of the filter tanks, a pair of inclined blocks are arranged on the filter tanks, and the inclined blocks are arranged on the inner sides of the filter tanks. The utility model relates to the technical field of flowback fluid treatment, adopts the multi-stage filtering design, adopts the plurality of filtering basins which are installed in a step shape, and is matched with the filtering drum, the filtering nets and the filtering plates on the U-shaped inclined blocks, so that the flowback fluid can be effectively filtered, and the flowback fluid can be efficiently and efficiently treated by the filtering drum, the filtering nets and the filtering plates on the U-shaped inclined blocks and the like. According to the flow-back liquid filter, graded fine filtration can be carried out according to the characteristics of impurities with different particle sizes in flow-back liquid, the filtration precision is greatly improved, various solid substances, fine particles and suspended solids are effectively removed, and it is ensured that the treated liquid meets the high-standard recycling or discharging requirement.

Description

Technical Field

[0001] This utility model relates to the field of backflow fluid treatment technology, specifically a multi-stage cyclone desanding device for fracturing backflow fluid. Background Technology

[0002] During fracturing operations, a large amount of fracturing flowback fluid is generated, containing a large amount of solid matter, impurities of different particle sizes, microorganisms, and bacteria. Direct discharge without effective treatment will cause serious environmental pollution and waste water resources. Currently, existing fracturing flowback fluid treatment equipment has many shortcomings in filtration. On the one hand, some equipment relies solely on simple gravity sedimentation or a single filtration structure for solid-liquid separation, resulting in low filtration efficiency and an inability to quickly and effectively separate solid matter and impurities from the flowback fluid, failing to meet the processing speed requirements of actual production. On the other hand, while some equipment has some filtration capabilities, its filtration precision is limited, and its removal effect on fine particles and suspended solids is poor, resulting in treated liquids still containing a significant amount of impurities, failing to meet reuse or discharge standards. Furthermore, during filtration, impurities easily clog filter components, affecting the normal operation of the equipment and requiring frequent shutdowns for cleaning, increasing maintenance costs and production downtime. In addition, existing equipment uses relatively simple methods to clean impurities adhering to filter components, making thorough removal difficult. Long-term use will affect the filtration effect and the lifespan of the equipment. Therefore, this project was developed to address these issues through in-depth research. Utility Model Content

[0003] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage cyclone desanding device for fracturing flowback fluid, comprising a processing support, on which multiple filter tanks are arranged in a stepped manner, a filter roller is provided on the inner side of each filter tank, a pair of inclined blocks are provided on each filter tank, the filter rollers are inserted into the pair of inclined blocks via bearings, a flow divider is provided on each filter tank, a transmission bevel gear is provided on each filter roller, a drive bevel gear is provided on the drive end of the flow divider, the drive bevel gear meshes with the transmission bevel gear, a U-shaped inclined block is provided on the inner side of each filter tank, the U-shaped inclined block is inclinedly inserted into the inner side of the filter tank, a filter screen and a filter plate are provided on the U-shaped inclined block, and the filter tanks are connected by a siphon flow collector.

[0004] Preferably, the siphon aspirator includes a J-shaped siphon tube, which is inserted into the filter tank. The J-shaped siphon tube is provided with a toothed diverter pipe, which is connected to multiple filter rollers. A pair of flanges are provided on the outer side of the J-shaped siphon tube, and a replaceable filter screen is provided on the inner side of the pair of flanges.

[0005] Preferably, the inner side of the J-shaped siphon is provided with a fixed horn-shaped unidirectional plate, the J-shaped siphon is provided with a discharge pipe, the discharge pipe is serrated, and the discharge pipe is provided with a discharge valve.

[0006] Preferably, the filter tank is equipped with an electromagnetic tapper, the electromagnetic tapper is equipped with a tapping ball, and the bottom of the filter tank is equipped with an aggregation membrane.

[0007] Preferably, the processing support is provided with an inclined gathering slide, and the processing support is provided with a plurality of horn-shaped gathering blocks, the plurality of horn-shaped gathering blocks being located above the inclined gathering slide, and the plurality of horn-shaped gathering blocks being provided with plastic strips.

[0008] Preferably, an ultrasonic vibrator is provided on the inner side of the filter tank, and an auxiliary vibrating liquid is provided between the collecting membrane and the filter tank. Beneficial effects

[0009] This utility model provides a multi-stage cyclone desander device for fracturing flowback fluid. It offers the following advantages: This multi-stage cyclone desander device for fracturing flowback fluid employs a multi-stage filtration design. Through multiple stepped filter tanks, combined with filter drums, filter screens on U-shaped inclined blocks, and filter plates, it can perform graded fine filtration based on the characteristics of impurities of different particle sizes in the flowback fluid, significantly improving filtration accuracy and effectively removing various solid substances, fine particles, and suspended solids, ensuring that the treated liquid meets high standards for reuse or discharge. The device utilizes a diversion drive motor to rotate the filter drums, generating centrifugal force to accelerate solid-liquid separation. Simultaneously, it uses a siphon principle to automatically guide the liquid downwards step by step through a J-shaped siphon pipe, and then evenly distributes it to multiple filter drums through toothed diversion pipes, greatly improving filtration efficiency and meeting the rapid treatment needs of flowback fluid in large-scale fracturing operations. The flange and replaceable filter screen on the siphon tube can be flexibly replaced according to actual filtration needs, adapting to different impurity filtration scenarios; the electromagnetic knocker and knocking ball, together with the cavitation effect generated by the ultrasonic vibrator, can effectively vibrate and clean the impurities attached to the filter components, prevent clogging, reduce the frequency of downtime for cleaning, reduce maintenance costs, and the auxiliary vibrating fluid can enhance the vibration effect; the inclined collection slide, the horn-shaped collection block and the plastic strip can concentrate and collect the cleaned impurities for easy subsequent processing. Attached Figure Description

[0010] Figure 1 This is a front sectional view of a multi-stage cyclone desanding device for fracturing flowback fluid according to the present invention.

[0011] Figure 2 This is a side cross-sectional schematic diagram of a multi-stage cyclone desanding device for fracturing flowback fluid according to the present invention.

[0012] Figure 3 for Figure 1 A magnified view of the letter "A" in the image.

[0013] In the diagram: 1. Processing support; 2. Filter tank; 3. Filter drum; 4. Inclined block; 5. Diverter drive; 6. Transmission bevel gear; 7. Drive bevel gear; 8. U-shaped inclined block; 9. Filter screen; 10. Filter plate; 11. J-shaped siphon tube; 12. Flange; 13. Replaceable filter screen. Detailed Implementation

[0014] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further. Example

[0016] Please see Figure 1-3 In fracturing operations for oil and natural gas extraction, a large amount of fracturing flowback fluid is generated. This flowback fluid has a complex composition, containing not only a large amount of solid sand and other impurities, but also various chemical additive residues and microorganisms. If it is not effectively treated, direct discharge will cause serious pollution to the soil, water bodies, and other ecological environments, and will also result in a huge waste of water resources. Most existing treatment methods have obvious defects. For example, some units only use simple sedimentation tanks for natural sedimentation separation. This method has a long processing cycle and low efficiency, and cannot effectively remove some fine particulate impurities, resulting in the treated liquid still containing a large amount of suspended solids, making it difficult to meet reuse or environmental discharge standards. Some units, although they use filtration structures, have a single filtration stage and limited filtration precision. They cannot perform graded filtration according to the characteristics of impurities of different particle sizes in the flowback fluid, causing large and small particles to be treated in the same filtration stage, which easily leads to clogging of filter components, affecting filtration effect and treatment efficiency.

[0017] Therefore, this application protects a multi-stage cyclone desander for fracturing flowback fluid. First, the flowback fluid is guided to the inside of multiple filter drums 3. The inclined filter drums 3 guide the liquid and filter out solid materials. The flow-dividing drive 5 rotates the drive bevel gear 7 on its drive end. The drive bevel gear 7 drives the transmission bevel gear 6 meshing with it, which in turn drives the filter drums 3 to rotate. This centrifugal filtration of the flowback fluid inside the filter drums 3 is achieved. When the liquid level inside the filter tank 2 is higher than the J-type siphon pipe 11, the liquid is guided downwards one by one through the siphon principle. The J-type siphon pipe 11 guides the downward-flowing liquid to the toothed diversion pipe, which then guides the liquid to the inside of multiple filter drums 3, thus performing multi-layer filtration. Filtration is achieved through the flange 12 on the J-type siphon pipe 11 and the replaceable filter screen 139, and through the cooperation of the U-shaped inclined block 84, the filter screen 9, and the filter plate 10.

[0018] In summary, the backflow liquid is first directed to the inner side of multiple filter drums 3. Since the filter drums 3 are mounted on a pair of inclined blocks 4 via bearings, they are tilted. This tilted design utilizes gravity to initially guide the liquid to one side of the filter drums 3, while simultaneously trapping solid matter on the surface of the filter drums 3, achieving initial solid-liquid separation. The flow divider 5 then rotates, driving the drive bevel gear 7 on its drive end. Because the drive bevel gear 7 meshes with the transmission bevel gear 6, according to the principle of gear transmission, the rotation of the drive bevel gear 7 will drive the transmission bevel gear 6 to rotate synchronously. The transmission bevel gear 6 is located on the filter drums 3, thus driving the filter drums 3 to rotate. When the filter drums 3 rotate, centrifugal force is generated. Under the action of centrifugal force, fine particles and impurities in the backflow liquid inside the filter drums 3 are more quickly thrown to the surface of the filter drums 3 and further separated from the liquid, thus achieving a more efficient centrifugal filtration effect. As the filtration process continues, the liquid level inside the filter tank 2 gradually rises. When the liquid level is higher than the J-type siphon, according to the siphon principle, the liquid will automatically flow downwards along the J-type siphon under atmospheric pressure, achieving sequential downward drainage. The toothed diverter pipes on the J-type siphon are connected to multiple filter rollers 3. When the liquid flows downwards through the J-type siphon, it enters the toothed diverter pipes. The unique structural design of the toothed diverter pipes can evenly distribute and guide the liquid to the inner side of multiple filter rollers 3, allowing the return liquid to pass through multiple filter rollers 3 for multi-layer filtration, further improving the filtration accuracy and effect. During the liquid flow through the J-type siphon, the flange 12 and the replaceable filter screen 139 on the J-type siphon play an important filtration role. The replaceable filter screen 139 can be replaced according to actual filtration needs to adapt to the filtration requirements of impurities of different particle sizes. When liquid flows through the replaceable filter screen 139, larger particles are trapped on the filter screen 9, achieving further filtration. Simultaneously, a U-shaped inclined block 4 is installed inside the filter tank 2, with the filter screen 9 and filter plate 10 mounted on it. As liquid flows through the U-shaped inclined block 4, it passes through the filter screen 9 and filter plate 10 in sequence. The filter screen 9 traps larger particles, while the filter plate 10 performs finer filtration, removing smaller particles and suspended solids. The design of the U-shaped inclined block 4 increases the contact time and area between the liquid and the filter screen 9 and filter plate 10, improving filtration efficiency. Furthermore, when impurities accumulate to a certain level inside the filter tank 2, the electromagnetic vibrator on the filter tank 2 activates. The vibrating ball on the electromagnetic vibrator periodically strikes the filter tank 2 under electromagnetic force, causing it to vibrate.This vibration loosens and removes impurities adhering to the surface of the filter roller 3, filter screen 9, filter plate 10, and the collecting membrane, preventing impurities from clogging the filter components and ensuring the normal operation of the filtration device. The collecting membrane at the bottom of the filter tank 2 collects the detached impurities, allowing them to aggregate for easier subsequent cleaning. On the processing support 1, an inclined collecting slide and multiple horn-shaped collecting blocks work together. The horn-shaped collecting blocks are located above the inclined collecting slide, and their special horn-shaped design guides the impurities cleaned from the filter tank 2 towards the inclined collecting slide. The plastic strips on the horn-shaped collecting blocks act as buffers and guides, allowing the impurities to slide more smoothly onto the inclined collecting slide, where they are finally collected and processed, facilitating the maintenance and cleaning of the entire device. Furthermore, the ultrasonic vibrator inside the filter tank 2 generates high-frequency ultrasonic waves. When these ultrasonic waves propagate in the liquid, they cause violent vibrations, generating tiny bubbles that quickly burst—a phenomenon known as cavitation. The impact force generated by cavitation can further impact impurities on the surface of filter drum 3, filter screen 9, and filter plate 10, making them easier to detach. It also has a certain killing effect on microorganisms and bacteria in the liquid. The auxiliary vibrating fluid placed between the collecting membrane and the filter tank 2 can transmit the vibration energy of the ultrasonic vibrator, enhancing the vibration effect and improving the cleaning and filtration capabilities of the entire device.

[0019] 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 multi-stage cyclone desander device for fracturing flowback fluid, characterized in that, The system includes a processing support frame, on which multiple filter tanks are mounted in a stepped manner. Each filter tank has a filter roller on its inner side and a pair of inclined blocks. The filter rollers are mounted on the inclined blocks via bearings. A flow-dividing drive is mounted on each filter tank, and a transmission bevel gear is mounted on the filter rollers. A drive bevel gear is mounted on the drive end of the flow-dividing drive, and the drive bevel gear meshes with the transmission bevel gear. U-shaped inclined blocks are also provided on the inner side of each filter tank, and these blocks are inclinedly inserted into the inner side of the filter tank. Filter screens and filter plates are mounted on the U-shaped inclined blocks. The filter tanks are connected by a siphon flow collector.

2. The multi-stage cyclone desander device for fracturing flowback fluid according to claim 1, characterized in that, The siphon aspirator includes a J-shaped siphon tube, which is inserted into the filter tank. The J-shaped siphon tube is provided with a toothed diverter pipe, which is connected to multiple filter rollers. The outer side of the J-shaped siphon tube is provided with a pair of flanges, and the inner side of the pair of flanges is provided with a replaceable filter screen.

3. The multi-stage cyclone desander device for fracturing flowback fluid according to claim 2, characterized in that, The inner side of the J-type siphon is provided with a fixed horn-shaped unidirectional plate, and the J-type siphon is provided with a discharge pipe, which is serrated and has a discharge valve.

4. The multi-stage cyclone desander device for fracturing flowback fluid according to claim 3, characterized in that, An electromagnetic tapper is installed on the filter tank, and a tapping ball is installed on the electromagnetic tapper. An aggregation membrane is installed at the bottom of the filter tank.

5. A multi-stage cyclone desander for fracturing flowback fluid according to claim 4, characterized in that, The processing support is provided with an inclined gathering slide, and multiple horn-shaped gathering blocks are provided on the processing support. The multiple horn-shaped gathering blocks are located above the inclined gathering slide, and plastic strips are provided on the multiple horn-shaped gathering blocks.

6. A multi-stage cyclone desander device for fracturing flowback fluid according to claim 5, characterized in that, An ultrasonic vibrator is installed inside the filter tank, and an auxiliary vibrating liquid is placed between the collecting membrane and the filter tank.

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