A kind of oilfield sewage treatment sedimentation equipment

Abstract

The utility model relates to oilfield sewage treatment technical field, and disclose a kind of oilfield sewage treatment sedimentation equipment, including sedimentation tank, the bottom end of the sedimentation tank is provided with conical sludge collecting hopper, the bottom end of the conical sludge collecting hopper is provided with sludge discharge pipeline.The oilfield sewage treatment sedimentation equipment, utilize the unique inclination of conical sludge collecting hopper structure, sludge after sedimentation will be under the action of its gravity naturally slide to sludge collecting hopper bottom, at this moment, sludge scraping motor drive transmission rod drives sludge scraping plate to carry out circumferential motion along conical sludge collecting hopper inner wall, can completely scrape off the sludge attached on sludge collecting hopper wall, ensure that sludge is all concentrated to sludge discharge pipeline, through sludge discharge pipeline, sludge can be realized automatic discharge, without artificial frequent entry tank interior and carry out cleaning operation, not only reduce the labor intensity of operator, also reduce the risk of equipment damage possibly brought by artificial cleaning, effectively reduce the maintenance cost of equipment, guarantee the long-term stable operation of equipment simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of oilfield wastewater treatment technology, specifically to a sedimentation device for oilfield wastewater treatment. Background Technology

[0002] During oilfield extraction, a large amount of oilfield wastewater is generated. This wastewater contains a large number of suspended particles, oily substances, and other pollutants. If discharged directly without effective treatment, it will cause serious environmental pollution. Sedimentation treatment is a key step in the treatment of oilfield wastewater. The existing patent document CN221235297U provides a settling tank for oilfield wastewater treatment. This settling tank can not only settle oilfield wastewater, but also effectively remove crude oil components from the wastewater.

[0003] However, existing sedimentation equipment for oilfield wastewater treatment does not adequately guarantee sludge discharge. Some equipment has an unreasonable bottom slope design for the sedimentation tank, making it difficult for sludge to slide smoothly to the discharge port under its own weight after accumulating at the bottom of the tank, resulting in a large amount of sludge residue. The discharge pipe diameter of some equipment is too small, making it easy to be blocked by larger particles of impurities in oilfield wastewater, affecting sludge discharge efficiency and even causing sludge discharge interruption. Even if some equipment is equipped with a stirring device to assist in sludge discharge, the stirring range is limited and cannot effectively stir the sludge in corners or near the tank wall, making it impossible for sludge in these areas to be discharged in time. This not only reduces the processing capacity of the equipment, but may also cause putrefaction and generate harmful gases due to long-term sludge retention, affecting the normal operation of the equipment and the safety of the surrounding environment. Utility Model Content

[0004] (a) Technical problems to be solved The purpose of this utility model is to provide a sedimentation device for oilfield wastewater treatment, so as to solve the problem mentioned in the background art that the existing sedimentation devices for oilfield wastewater treatment are not convenient to ensure sufficient sludge discharge during use.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: an oilfield wastewater treatment sedimentation device, including a sedimentation tank, a conical sludge collection hopper at the bottom of the sedimentation tank, and a sludge discharge pipe at the bottom of the conical sludge collection hopper; A scraper motor is fixedly installed in the middle of the conical sludge collection hopper. The transmission end of the scraper motor passes through the conical sludge collection hopper and is fixedly connected to a transmission rod. A scraper plate is fixedly connected to the outer surface of the transmission rod, and the scraper plate is fully in contact with the inner wall of the conical sludge collection hopper.

[0006] Furthermore, a water inlet pipe is fixedly installed on the upper surface of the settling tank, and a stirring motor is fixedly installed in the middle of the upper surface of the settling tank.

[0007] Furthermore, the transmission end at the bottom of the stirring motor is fixedly connected to a stirring shaft through the settling tank, and stirring blades are fixedly installed on the outer surface of the stirring shaft.

[0008] Furthermore, a liquid pump is fixedly installed on one side of the upper surface of the settling tank, and a retractable drain pipe is provided on one side of the liquid pump, with the end of the drain pipe away from the liquid pump extending into the interior of the settling tank.

[0009] Furthermore, a delivery pipe is provided on the side of the liquid pump away from the discharge pipe, and a support frame is fixedly provided on one side of the settling tank, with a drive motor fixedly installed at the top inside the support frame.

[0010] Furthermore, a lead screw is fixedly connected to the transmission end at the bottom of the drive motor. The end of the lead screw away from the drive motor is connected to the support frame through a bearing. An internal threaded sleeve is threadedly connected to the outer surface of the lead screw, and the internal threaded sleeve is slidably connected to the support frame.

[0011] Furthermore, an adjusting rod is fixedly connected to one side of the internally threaded sleeve, and the end of the adjusting rod away from the internally threaded sleeve extends into the interior of the settling tank through the top of the settling tank. The adjusting rod is movably connected to the settling tank, the drain pipe is fixedly connected to the adjusting rod, and an observation window is fixedly provided on the outer surface of the settling tank.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This oilfield wastewater treatment sedimentation equipment utilizes the unique inclined structure of a conical sludge collection hopper. The settled sludge will naturally slide to the bottom of the hopper under its own gravity. At this time, the scraper motor drives the transmission rod to move the scraper blade in a circular motion along the inner wall of the conical sludge collection hopper, which can thoroughly scrape off the sludge attached to the hopper wall, ensuring that all the sludge is concentrated at the sludge discharge pipe. Through the sludge discharge pipe, the sludge can be automatically discharged without the need for frequent manual entry into the tank for cleaning. This not only reduces the labor intensity of the operators, but also reduces the risk of equipment damage caused by manual cleaning, effectively reducing the maintenance cost of the equipment, while ensuring the long-term stable operation of the equipment. 2. This oilfield wastewater treatment sedimentation equipment uses a stirring motor to drive the stirring shaft and stirring blades to rotate at high speed, which can strongly agitate the oilfield wastewater entering the sedimentation tank. This operation can accelerate the collision and agglomeration of suspended particles of different sizes in the wastewater under the impact of violent water flow, and the particle size increases rapidly, thereby significantly accelerating its sedimentation speed under the action of gravity. At the same time, the stirring process also promotes the full mixing of added flocculants and other agents with the wastewater, which greatly improves the reaction efficiency of the agents, allowing pollutants in the wastewater to be separated from the liquid phase more quickly and fully, effectively shortening the overall wastewater treatment cycle and greatly improving sedimentation efficiency. 3. This oilfield wastewater treatment sedimentation equipment uses a drive motor to rotate a lead screw, which allows the internal threaded sleeve to move precisely up and down along the lead screw. This, in turn, causes the adjusting rod and the drain pipe to rise and fall synchronously. Operators can observe the sedimentation and stratification of wastewater in the sedimentation tank in real time through an observation window. They can flexibly adjust the height of the drain pipe according to actual needs. In the early stage of wastewater sedimentation, the drain pipe is adjusted to a higher position to avoid extracting insufficiently settled wastewater. As the sedimentation process progresses, the height of the drain pipe is gradually lowered to accurately extract the clearer, compliant liquid from the upper layer, which is then discharged through a liquid pump and a delivery pipe. This flexible drain adjustment method can effectively adapt to the treatment needs of different water qualities and different sedimentation stages, significantly improving the versatility of the equipment and the stability of the treatment effect. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the settling tank of this utility model; Figure 3 This is a three-dimensional structural diagram of the scraper blade of this utility model; Figure 4 This is a three-dimensional structural diagram of the support frame of this utility model.

[0014] In the diagram: 1. Settling tank; 2. Conical sludge hopper; 3. Sludge discharge pipe; 4. Sludge scraper motor; 5. Drive rod; 6. Sludge scraper; 7. Water inlet pipe; 8. Agitator motor; 9. Agitator shaft; 10. Agitator blades; 11. Liquid pump; 12. Drainage pipe; 13. Conveying pipe; 14. Support frame; 15. Drive motor; 16. Lead screw; 17. Internal threaded sleeve; 18. Adjusting rod; 19. Observation window. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 - Figure 4 This utility model provides a technical solution: an oilfield wastewater treatment sedimentation device, including a sedimentation tank 1, a conical sludge collection hopper 2 at the bottom end of the sedimentation tank 1, and a sludge discharge pipe 3 at the bottom end of the conical sludge collection hopper 2. A scraper motor 4 is fixedly installed in the middle of the conical mud collection hopper 2. The transmission end of the scraper motor 4 passes through the conical mud collection hopper 2 and is fixedly connected to a transmission rod 5. A scraper plate 6 is fixedly connected to the outer surface of the transmission rod 5. The scraper plate 6 is fully in contact with the inner wall of the conical mud collection hopper 2.

[0017] After the sewage is discharged, the sludge scraper motor 4 starts, and the transmission end of the sludge scraper motor 4 drives the transmission rod 5 to rotate, which in turn causes the sludge scraper 6 fixed on the outer surface of the transmission rod 5 to rotate. Since the sludge scraper 6 is fully in contact with the inner wall of the conical sludge collection hopper 2, during the rotation, the sludge scraper 6 can scrape off the sludge adhering to the inner wall of the sludge collection hopper and push the sludge to the sludge discharge pipe 3 at the bottom of the sludge collection hopper. This effectively avoids the accumulation and residue of sludge on the inner wall of the sludge collection hopper and ensures the full discharge of sludge. Finally, the sludge is discharged from the equipment through the sludge discharge pipe 3, completing the treatment of oilfield sewage.

[0018] A water inlet pipe 7 is fixedly installed on the upper surface of the settling tank 1. A stirring motor 8 is fixedly installed in the middle of the upper surface of the settling tank 1. The transmission end of the stirring motor 8 passes through the settling tank 1 and is fixedly connected to a stirring shaft 9. Stirring blades 10 are fixedly installed on the outer surface of the stirring shaft 9. A liquid pump 11 is fixedly installed on one side of the upper surface of the settling tank 1. A retractable drain pipe 12 is provided on one side of the liquid pump 11. The end of the drain pipe 12 away from the liquid pump 11 extends into the interior of the settling tank 1. A delivery pipe 13 is provided on the side of the liquid pump 11 away from the drain pipe 12. A support frame 14 is fixedly installed on one side of the settling tank 1. The support frame 14 contains... A drive motor 15 is fixedly installed at the top of the settling tank 1. A lead screw 16 is fixedly connected to the transmission end of the drive motor 15. The end of the lead screw 16 away from the drive motor 15 is connected to the support frame 14 through a bearing. An internal threaded sleeve 17 is threadedly connected to the outer surface of the lead screw 16. The internal threaded sleeve 17 is slidably connected to the support frame 14. An adjusting rod 18 is fixedly connected to one side of the internal threaded sleeve 17. The end of the adjusting rod 18 away from the internal threaded sleeve 17 extends into the settling tank 1 through the top of the settling tank 1. The adjusting rod 18 is movably connected to the settling tank 1. The drain pipe 12 is fixedly connected to the adjusting rod 18. An observation window 19 is fixedly provided on the outer surface of the settling tank 1.

[0019] When the equipment performs sedimentation operations for oilfield wastewater treatment, the wastewater flows into the sedimentation tank 1 through the inlet pipe 7 on the upper surface. The stirring motor 8 then starts, driving the stirring shaft 9 and stirring blades 10 to rotate at high speed, thoroughly agitating the wastewater. During this agitation, suspended particles, oil droplets, and other impurities in the wastewater collide and aggregate, accelerating the sedimentation process. Simultaneously, staff can monitor the mixing and sedimentation of the wastewater in real time through the observation window 19. As agitation continues, larger particles formed in the wastewater gradually sink to the conical sludge collection hopper 2 at the bottom of the sedimentation tank 1 under gravity. During sedimentation, the clear liquid portion of the wastewater slowly rises to the top of the tank, preparing for subsequent discharge. Once the oilfield wastewater has fully settled... After settling, the drive motor 15 starts working, driving the lead screw 16 to rotate. The internal threaded sleeve 17, which is threaded to the lead screw 16, slides up and down along the guide structure of the support frame 14 under the action of thread transmission, thereby driving the adjusting rod 18 to move. The adjusting rod 18 is fixedly connected to the drain pipe 12, so the height position of the drain pipe 12 in the tank can be precisely adjusted so that it extends into the appropriate clear liquid layer. Subsequently, the liquid pump 11 starts, drawing out the clear liquid in the upper part of the settling tank 1 through the drain pipe 12, and transporting it to the subsequent treatment stage or discharge after reaching the standard through the conveying pipe 13. During this process, the staff can classify and collect the settled liquid by adjusting the position of the drain pipe 12 multiple times, so as to achieve full treatment of oilfield wastewater.

[0020] Working Principle: When the equipment performs sedimentation operations for oilfield wastewater treatment, the wastewater flows into the sedimentation tank 1 through the inlet pipe 7 on the upper surface. The stirring motor 8 then starts, and its transmission end drives the stirring shaft 9 and stirring blades 10 to rotate at high speed, thoroughly stirring the wastewater. During the stirring process, suspended particles, oil droplets, and other impurities in the wastewater collide and aggregate, accelerating the sedimentation process. At the same time, the staff can observe the mixing and sedimentation of the wastewater in the tank in real time through the observation window 19. As the stirring continues, larger particles of impurities formed in the wastewater gradually sink to the conical sludge hopper 2 at the bottom of the sedimentation tank 1 under the action of gravity. During the sedimentation process, the clear liquid in the wastewater slowly rises to the upper part of the tank, preparing for subsequent discharge. After the oilfield wastewater has fully settled, the drive motor 15 starts working, driving the lead screw 16 to rotate. The internally threaded sleeve 17, which is threaded to the lead screw 16, slides up and down along the guide structure of the support frame 14 under the action of threaded transmission, thereby driving the adjusting rod 18 to move. 8 is fixedly connected to the drain pipe 12, allowing precise adjustment of the drain pipe 12's height within the tank to reach the appropriate clear liquid layer. Subsequently, the liquid pump 11 starts, drawing the clear liquid from the upper part of the settling tank 1 through the drain pipe 12 and transporting it via the conveying pipe 13 to subsequent treatment stages or for compliant discharge. During this process, workers can repeatedly adjust the position of the drain pipe 12 to classify and collect the settled liquid, achieving thorough treatment of oilfield wastewater. After the wastewater is discharged, a scraper is used to... When the mud motor 4 starts, the transmission end of the mud scraper motor 4 drives the transmission rod 5 to rotate, which in turn causes the scraper 6 fixed on the outer surface of the transmission rod 5 to rotate. Since the scraper 6 is fully in contact with the inner wall of the conical mud collection hopper 2, during the rotation, the scraper 6 can scrape off the sludge adhering to the inner wall of the mud collection hopper and push the sludge to the sludge discharge pipe 3 at the bottom of the mud collection hopper. This effectively avoids the accumulation and residue of sludge on the inner wall of the mud collection hopper and ensures the full discharge of sludge. Finally, the sludge is discharged from the equipment through the sludge discharge pipe 3, completing the treatment of oilfield wastewater.

[0021] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A sedimentation device for oilfield wastewater treatment, comprising a sedimentation tank (1), characterized in that: The bottom end of the settling tank (1) is provided with a conical mud collection hopper (2), and the bottom end of the conical mud collection hopper (2) is provided with a mud discharge pipe (3). A scraper motor (4) is fixedly installed in the middle of the conical mud collection hopper (2). The transmission end of the scraper motor (4) passes through the conical mud collection hopper (2) and is fixedly connected to a transmission rod (5). A scraper plate (6) is fixedly connected to the outer surface of the transmission rod (5). The scraper plate (6) is fully in contact with the inner wall of the conical mud collection hopper (2).

2. The sedimentation equipment for oilfield wastewater treatment according to claim 1, characterized in that: A water inlet pipe (7) is fixedly installed on the upper surface of the settling tank (1), and a stirring motor (8) is fixedly installed in the middle of the upper surface of the settling tank (1).

3. The sedimentation equipment for oilfield wastewater treatment according to claim 2, characterized in that: The transmission end of the stirring motor (8) is fixedly connected to the stirring shaft (9) through the settling tank (1), and stirring blades (10) are fixedly provided on the outer surface of the stirring shaft (9).

4. The sedimentation equipment for oilfield wastewater treatment according to claim 1, characterized in that: A liquid pump (11) is fixedly installed on one side of the upper surface of the settling tank (1). A retractable drain pipe (12) is provided on one side of the liquid pump (11). The end of the drain pipe (12) away from the liquid pump (11) extends into the interior of the settling tank (1).

5. The sedimentation equipment for oilfield wastewater treatment according to claim 4, characterized in that: The liquid pump (11) is provided with a delivery pipe (13) on the side away from the drain pipe (12), and a support frame (14) is fixedly provided on one side of the settling tank (1). A drive motor (15) is fixedly installed at the top inside the support frame (14).

6. The sedimentation equipment for oilfield wastewater treatment according to claim 5, characterized in that: A lead screw (16) is fixedly connected to the transmission end of the drive motor (15). The end of the lead screw (16) away from the drive motor (15) is connected to the support frame (14) through a bearing. An internal thread sleeve (17) is threadedly connected to the outer surface of the lead screw (16). The internal thread sleeve (17) is slidably connected to the support frame (14).

7. The sedimentation equipment for oilfield wastewater treatment according to claim 6, characterized in that: An adjusting rod (18) is fixedly connected to one side of the internal threaded sleeve (17). The end of the adjusting rod (18) away from the internal threaded sleeve (17) extends into the settling tank (1) through the top of the settling tank (1). The adjusting rod (18) is movably connected to the settling tank (1). The drain pipe (12) is fixedly connected to the adjusting rod (18). An observation window (19) is fixedly provided on the outer surface of the settling tank (1).

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