Sewage recovery device for underground operation

Abstract

The utility model discloses a sewage recovery device for underground operation, which relates to the technical field of oil exploitation and comprises a recovery treatment box, two partition plates and a flocculant charging barrel, and the two partition plates are mounted in the recovery treatment box. Firstly, a flocculating agent is added into the sedimentation tank to precipitate suspended solids, heavy metal ions and other substances in the sewage to the bottom of the tank, then organic matters in the sewage are decomposed into harmless substances through microorganisms in the biological treatment tank to further purify a water body, and finally, a small amount of oil stains and organic matters in the sewage are adsorbed through the activated carbon adsorption tank. According to the oil field sewage treatment device, the two continuous inserting grooves are formed, so that the activated carbon plate can be conveniently replaced, the sewage recovery process does not need to be suspended during replacement, and the sewage recovery efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil exploitation, in particular to a sewage recovery device for underground operations. Background Art

[0002] A large amount of oily wastewater is produced during the oil extraction process. The wastewater contains a large amount of pollutants such as organic matter and heavy metals. If it is not effectively treated, the wastewater will cause serious pollution to the environment.

[0003] After searching, the patent authorization announcement number CN 211819286 U discloses an oilfield underground operation wastewater recovery device, "including a sedimentation cylinder and a stirring motor installed on the top of the sedimentation cylinder, a slag discharge port is provided in the middle part of the lower end of the sedimentation cylinder, and the outer wall of the sedimentation cylinder is respectively provided with a plurality of arc-shaped liquid inlet covers with the same rotation direction, the liquid inlet of the arc-shaped liquid inlet cover is close to the outer wall of the sedimentation cylinder, and the liquid outlet of the arc-shaped liquid inlet cover is tangent to the cross-sectional circle of the side wall of the sedimentation cylinder. A stirring blade located between the liquid outlets is provided on the rotating shaft driven by the stirring motor, and the rotating shaft passes through the filter screen in the sedimentation cylinder. The filter screen divides the sedimentation cylinder into two parts, upper and lower. A plurality of recovery pipes are provided on the top of the upper part of the sedimentation cylinder, and symmetrical brush rods are respectively fixed on the rotating shaft below the filter screen, and a row of bristles in contact with the lower surface of the filter screen are respectively fixed on the upper surface of each brush rod." Although the above device solves the problem that the traditional sewage treatment equipment does not perform sedimentation treatment on the sewage, the above existing recovery device only performs sedimentation and filtration treatment on the sewage, and cannot remove the organic matter in the sewage well, and the sewage treatment effect is not good. Utility Model Content

[0004] The purpose of the utility model is to provide a sewage recovery device for underground operations to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sewage recovery device for underground operations comprises a recovery and treatment box, a partition plate and a flocculant barrel, wherein two partition plates are installed inside the recovery and treatment box, and the two partition plates divide the interior of the recovery and treatment box into a sedimentation tank, a biological treatment tank and an activated carbon adsorption tank in sequence, a flocculant barrel is installed on the upper part of the sedimentation tank, a sediment discharge pipe is installed at the bottom of the sedimentation tank, a connecting pipe is installed on the partition plate between the sedimentation tank and the biological treatment tank, the sedimentation tank and the biological treatment tank are connected through the connecting pipe, a biological filler layer is installed in the biological treatment tank, an oil outlet pipe connected to the sedimentation tank is installed on one side of the recovery and treatment box, two slots are continuously arranged on the inner walls on both sides of the activated carbon adsorption tank, the activated carbon plate is movably inserted in the two oppositely arranged slots, and a sewage pipe is arranged directly above the sedimentation tank.

[0007] As a further solution of the utility model: a flow control valve is installed at the bottom outlet of the flocculant barrel.

[0008] As a further solution of the utility model: a water pump is installed on the partition plate between the biological treatment tank and the activated carbon adsorption tank, and water pipes are installed on the water inlet and water outlet of the water pump respectively. The water pipe installed on the water inlet of the water pump penetrates the biological filler layer and is inserted into the bottom of the biological treatment tank, and the water pipe installed on the water outlet of the water pump is inserted into the activated carbon adsorption tank.

[0009] As a further solution of the utility model: an observation window is arranged on the outer wall of the recovery and processing box facing the sedimentation tank.

[0010] As a further solution of the utility model: the activated carbon plate comprises a plate frame, activated carbon and a pull ring, the activated carbon is installed in the middle of the plate frame, and the pull ring is installed on the top of the plate frame.

[0011] As a further solution of the utility model: valves are installed on the sediment discharge pipe and the drain pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model sets a sedimentation tank, a biological treatment tank and an activated carbon adsorption tank. First, a flocculant is added to the sedimentation tank to precipitate suspended matter, heavy metal ions and other substances in the sewage to the bottom of the tank. Then, the organic matter in the sewage is decomposed into harmless substances by the microorganisms in the biological treatment tank to further purify the water body. Finally, a small amount of oil and organic matter in the sewage is adsorbed by the activated carbon adsorption tank. In this way, the oilfield sewage can be treated more thoroughly, meet the discharge standards, and achieve sustainable utilization of water resources.

[0014] 2. The utility model can facilitate the replacement of the activated carbon plate by setting two continuous slots. There is no need to suspend the sewage recovery process during replacement, which can improve the sewage recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front cross-sectional view of a sewage recovery device for underground operations.

[0016] Figure 2 A sewage recovery device for underground operations Figure 1 Schematic diagram of the structure of the activated carbon plate.

[0017] Figure 3 It is a front view of a sewage recovery device for underground operations.

[0018] 1. Recycling and processing box; 2. Partition plate; 3. Sedimentation tank; 4. Biological treatment tank; 5. Activated carbon adsorption tank; 6. Connecting pipe; 7. Water pump; 8. Water pipe; 9. Biological filler layer; 10. Flocculant barrel; 11. Slot; 12. Activated carbon plate; 1201. Plate frame; 1202. Activated carbon; 1203. Pull ring; 13. Drain pipe; 14. Sediment discharge pipe; 15. Oil outlet pipe; 16. Sewage pipe; 17. Observation window; 18. Flow control valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 and Figure 3 In the embodiment of the utility model, a sewage recovery device for underground operation includes a recovery treatment box 1, a partition plate 2 and a flocculant barrel 10. Two partition plates 2 are installed inside the recovery treatment box 1. The two partition plates 2 divide the inside of the recovery treatment box 1 into a sedimentation tank 3, a biological treatment tank 4 and an activated carbon adsorption tank 5 in sequence. A sediment discharge pipe 14 is installed at the bottom of the sedimentation tank 3. A connecting pipe 6 is installed on the partition plate 2 between the sedimentation tank 3 and the biological treatment tank 4. The sedimentation tank 3 is connected to the biological treatment tank 4 through the connecting pipe 6. A biological filler layer 9 is installed in the biological treatment tank 4. An oil outlet pipe 15 connected to the sedimentation tank 3 is installed on one side of the recovery and treatment box 1, a water pump 7 is installed on the partition plate 2 between the biological treatment tank 4 and the activated carbon adsorption tank 5, and water pipes 8 are respectively installed on the water inlet and the water outlet of the water pump 7. The water pipe 8 installed on the water inlet of the water pump 7 penetrates the biological filler layer 9 and is inserted into the bottom of the biological treatment tank 4. The water pipe 8 installed on the water outlet of the water pump 7 is inserted into the activated carbon adsorption tank 5. Valves are installed on the sediment discharge pipe 14 and the drain pipe 13, which can facilitate the control of sediment discharge within a specified time and the control of the discharge speed of the drain pipe 13.

[0021] See also Figure 1 A flocculant barrel 10 is installed on the upper part of the sedimentation tank 3, and a flow control valve 18 is installed at the bottom outlet of the flocculant barrel 10. The setting of the flow control valve 18 can facilitate personnel to control the amount of flocculant added.

[0022] See also Figure 1-2Two slots 11 are continuously arranged on the inner walls on both sides of the activated carbon adsorption tank 5, and the activated carbon plate 12 is movably inserted in the two oppositely arranged slots 11. A sewage pipe 16 is arranged just above the sedimentation tank 3. The activated carbon plate 12 includes a plate frame 1201, activated carbon 1202 and a pull ring 1203. The activated carbon 1202 is installed in the middle of the plate frame 1201, and the pull ring 1203 is installed on the top of the plate frame 1201. The setting of the pull ring 1203 can facilitate personnel to take out the activated carbon plate 12 from the activated carbon adsorption tank 5 for replacement.

[0023] See also Figure 3 An observation window 17 is provided on the outer wall of the recovery and processing box 1 facing the sedimentation tank 3. The observation window 17 allows personnel to observe the position of the oil-water separation layer and the amount of sediment in the sedimentation tank 3 from the outside of the device, so as to better separate the sediment, oil and water.

[0024] The working principle of the utility model is:

[0025] During use, sewage is transported to the sedimentation tank 3 through the sewage pipe 16, and then flocculants are added to the sedimentation tank 3. The flocculants make the suspended solids, heavy metal ions and other substances in the sewage in the sedimentation tank 3 finally discharged from the sediment discharge pipe 14 at the bottom of the sedimentation tank 3. The oil floats on the water surface and is finally discharged from the oil outlet pipe 15. The sewage in the middle layer enters the biological treatment tank 4 from the connecting pipe 6. The bacteria in the biological filler layer 9 in the biological treatment tank 4 will decompose the organic matter in the sewage into harmless substances to further purify the water body. Then, the sewage in the biological treatment tank 4 is pumped into the activated carbon adsorption tank 5 through the water pump 7. When the sewage passes through the activated carbon plate 12, the porous structure on the surface of the activated carbon plate 12 can adsorb the oil and organic matter in the wastewater to achieve the re-purification of the sewage. Finally, the sewage is discharged from the drain pipe 13.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sewage recovery device for underground operations, comprising a recovery treatment box (1), a partition plate (2), a flocculant cylinder (10) and an activated carbon plate (12), characterized in that: Two partition plates (2) are installed inside the recycling and processing box (1), and the two partition plates (2) divide the interior of the recycling and processing box (1) into a sedimentation tank (3), a biological treatment tank (4) and an activated carbon adsorption tank (5) in sequence. A flocculant barrel (10) is installed on the upper part of the sedimentation tank (3), and a sediment discharge pipe (14) is installed at the bottom of the sedimentation tank (3). A connecting pipe (6) is installed on the partition plate (2) between the sedimentation tank (3) and the biological treatment tank (4), and the sedimentation tank (3) and the biological treatment tank (4) are connected through the connecting pipe (6). A biological filler layer (9) is installed in the biological treatment tank (4). An oil outlet pipe (15) connected to the sedimentation tank (3) is installed on one side of the recycling and processing box (1). Two slots (11) are continuously arranged on the inner walls of both sides of the activated carbon adsorption tank (5), and the activated carbon plate (12) is movably inserted in the two slots (11) arranged opposite to each other. A sewage pipe (16) is arranged directly above the sedimentation tank (3).

2. A sewage recovery device for underground operations according to claim 1, characterized in that: A flow control valve (18) is installed at the bottom outlet of the flocculant barrel (10).

3. The sewage recovery device for underground operation according to claim 1 is characterized in that: A water pump (7) is installed on the partition plate (2) between the biological treatment tank (4) and the activated carbon adsorption tank (5), and water pipes (8) are installed on the water inlet and the water outlet of the water pump (7), respectively. The water pipe (8) installed on the water inlet of the water pump (7) penetrates the biological filler layer (9) and is inserted into the bottom of the biological treatment tank (4), and the water pipe (8) installed on the water outlet of the water pump (7) is inserted into the activated carbon adsorption tank (5).

4. A sewage recovery device for underground operations according to claim 1, characterized in that: An observation window (17) is provided on the outer wall of the recovery and treatment box (1) facing the sedimentation tank (3).

5. The sewage recovery device for underground operation according to claim 1 is characterized in that: The activated carbon plate (12) comprises a plate frame (1201), activated carbon (1202) and a pull ring (1203); the activated carbon (1202) is installed in the middle of the plate frame (1201), and the pull ring (1203) is installed on the top of the plate frame (1201).

6. The sewage recovery device for underground operation according to claim 1, characterized in that: Valves are installed on the sediment discharge pipe (14) and the drainage pipe (13).

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