Oil field sewage hydrogen sulfide treatment method and equipment

Abstract

The invention belongs to the technical field of hydrogen sulfide treatment, and particularly discloses an oil field sewage hydrogen sulfide treatment method and equipment, and the oil field sewage hydrogen sulfide treatment equipment comprises: a tank body used for spraying hydrogen sulfide gas; the communicating pipe is vertically inserted into the tank body and is used for introducing a treatment solution into the tank body; the number of the arc-shaped barrels is two, the two arc-shaped barrels are oppositely arranged, and the center of the inner concave face of each arc-shaped barrel is connected with the bottom end of the communicating pipe through a hose. A circular plate moves up and down in a side frame through a lifting part, clamping teeth are matched with a rack in a buckled mode, an arc-shaped barrel swings up and down in a tank body through the elastic force of an elastic piece, a treatment solution is sprayed through a plurality of swinging atomization nozzles, the combination degree of the treatment solution and hydrogen sulfide gas is improved, and the treatment effect is improved. And hydrogen sulfide gas with different concentrations can be rapidly treated.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen sulfide treatment technology, and specifically relates to a method and equipment for treating hydrogen sulfide in oilfield wastewater. Background Technology

[0002] In oilfield water injection systems, the reinjection water treatment system is generally in a closed state, and the resulting anaerobic environment is very conducive to the growth and reproduction of sulfate-reducing bacteria. Sulfate-reducing bacteria can convert sulfate ions into hydrogen sulfide, thereby causing severe corrosion of drilling and production equipment, water injection pipelines and other metal materials.

[0003] Hydrogen sulfide gas is extracted from the reinjection water treatment system using a vacuum pump and then introduced into the treatment tank. The concentration of hydrogen sulfide varies at different locations in the treatment tank, and simple spraying equipment cannot quickly process the hydrogen sulfide gas.

[0004] Therefore, it is necessary to invent a method and equipment for treating hydrogen sulfide in oilfield wastewater to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a method and equipment for treating hydrogen sulfide in oilfield wastewater, thereby resolving the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oilfield wastewater hydrogen sulfide treatment device, comprising: a tank for spraying hydrogen sulfide gas; a connecting pipe vertically inserted into the tank for introducing a treatment solution into the tank; two arc-shaped cylinders arranged opposite each other, with the bottom end of the connecting pipe connected to the center of the concave surface of the arc-shaped cylinders via a flexible hose; atomizing nozzles with multiple atomizing nozzles on both the top and bottom surfaces of the arc-shaped cylinders for spraying the treatment solution into the tank; a swing rod installed at the end of the arc-shaped cylinder; and an elastic element installed on the swing rod for driving the arc-shaped cylinder to swing inside the tank.

[0007] Furthermore, a connecting pipe is provided at the top of the tank, and the connecting pipe is vertically inserted into the inside of the tank through the connecting pipe, and a capping knob is used on the top of the connecting pipe.

[0008] Furthermore, an exhaust pipe is provided on the surface of the through pipe, and the output end of the exhaust pipe is connected to the input end of the air extraction device. An air inlet pipe is provided on the outer circumference of the tank body, and the collected hydrogen sulfide gas is introduced into the tank body through the air inlet pipe.

[0009] Furthermore, a drain pipe is provided on the outer circumference of the tank body for discharging the treatment solution inside the tank.

[0010] Furthermore, the tank body is provided with two side frames inside. The top of the side frames is connected to the inner top surface of the tank body. A circular plate is provided inside the side frames. The top of the circular plate is connected to the lifting part. Two opposing convex plates are provided on the outer circumference of the circular plate. A swing rod is horizontally penetrating through both convex plates. Both ends of the swing rod are connected to the end of the arc-shaped cylinder by arc-shaped rods.

[0011] Furthermore, both ends of the outer circumference of the swing rod are fixed with locking teeth, the surface of the side frame is provided with a vertical groove corresponding to the protrusion plate, and the outer circumference of the side frame is provided with a rack corresponding to the locking teeth, the rack corresponding to the vertical groove.

[0012] Furthermore, a flat plate is fixed at the center of the swing rod, and an arc-shaped groove corresponding to the flat plate is provided on the outer side of the convex plate. A curved plate is provided at the center of the arc-shaped groove, and the rotating flat plate slides on the surface of the curved plate.

[0013] Furthermore, the elastic element is located inside the arc-shaped groove, and the elastic force of the elastic element keeps the plate in a horizontal state.

[0014] Furthermore, the lifting unit includes: a vertical rod, a curved bar, and a driving component; the top end of the vertical rod penetrates through the top surface of the tank, the bottom end of the vertical rod is inside the side frame, and the bottom end of the vertical rod is connected to the center of the top surface of the circular plate; the top end of the vertical rod is connected to the curved bar; the driving component is installed on the top surface of the tank, and the output end of the driving component is connected to the bottom surface of the curved bar.

[0015] This invention also provides a method for treating hydrogen sulfide in oilfield wastewater, the method using the aforementioned oilfield wastewater hydrogen sulfide treatment equipment, comprising the following steps: S1. The connecting pipe is sealed at the top opening of the connecting pipe using the sealing knob, and the exhaust pipe is connected to the input end of the air extraction equipment to introduce the collected hydrogen sulfide gas into the tank through the air inlet pipe. S2. Use a plug to seal the drain pipe and pass the treatment solution into the arc-shaped cylinder through the flexible tube at the bottom of the connecting pipe; S3. The lifting unit is used to move the circular plate up and down inside the side frame. The moving circular plate uses the convex plate to make the two arc-shaped cylinders move synchronously. The moving arc-shaped cylinders use multiple atomizing nozzles to spray the treatment solution, and the treatment solution absorbs hydrogen sulfide gas. S4. Open the plug of the drain pipe. The gas extraction equipment uses the exhaust pipe to extract the treated gas, and the treatment solution that absorbed the hydrogen sulfide gas is discharged through the drain pipe, thus completing the treatment of hydrogen sulfide gas.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention uses a lifting mechanism to move the circular plate up and down inside the side frame. The locking mechanism of the teeth and the rack and pinion engages, and the elastic force of the elastic element causes the arc-shaped cylinder to swing up and down inside the tank. Multiple atomizing nozzles that swing the cylinder spray the treatment solution, thereby increasing the degree of bonding between the treatment solution and hydrogen sulfide gas and rapidly treating hydrogen sulfide gas of different concentrations.

[0017] 2. This invention uses a curved plate to limit the flat plate and an elastic element to limit the swing rod, which facilitates driving the arc-shaped cylinder back to a horizontal state. When the lifting part stops moving, it ensures the stability of the arc-shaped cylinder in the tank. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the oilfield wastewater hydrogen sulfide treatment equipment according to an embodiment of the present invention; Figure 2 This is a schematic diagram of two arc-shaped cylinders relative to each other in an embodiment of the present invention; Figure 3 This is a schematic diagram of the convex plate connecting to the arc-shaped cylinder using a swing rod according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the convex plate on the surface of the circular plate according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the side frame structure according to an embodiment of the present invention; In the diagram: 1. Tank body; 101. Through pipe; 102. Exhaust pipe; 103. Air inlet pipe; 104. Drain pipe; 2. Connecting pipe; 3. Arc-shaped cylinder; 301. Flexible hose; 4. Atomizing nozzle; 5. Swing rod; 6. Elastic component; 7. Cover; 8. Side frame; 9. Circular plate; 10. Convex plate; 11. Arc-shaped rod; 12. Clamping tooth; 13. Vertical groove; 14. Rack; 15. Flat plate; 16. Arc-shaped groove; 17. Bending plate; 18. Vertical rod; 19. Bending strip; 20. Driving component. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Example 1:

[0020] This invention provides a hydrogen sulfide treatment device for oilfield wastewater, such as... Figure 1As shown, the system includes: a tank 1, which has a cylindrical shape. A through-pipe 101 is located at the center of the top surface of the tank 1. A connecting pipe 2 is vertically inserted into the tank 1 through the through-pipe 101, and a cap 7 is screwed onto the top of the through-pipe 101. The connecting pipe 2 allows the treatment solution to flow into the tank 1. An exhaust pipe 102 is located on the surface of the through-pipe 101, and the output end of the exhaust pipe 102 is connected to the input end of a vacuum pump. The vacuum pump is a vacuum pump. An inlet pipe 103 is located on the outer circumference of the tank 1, through which the collected hydrogen sulfide gas is introduced into the tank 1. A drain pipe 104 is located on the outer circumference of the tank 1, and the drain pipe 104 is sealed with a plug.

[0021] The treatment solution can be a sodium hydroxide solution, which can react with hydrogen sulfide to neutralize the acidity of hydrogen sulfide and produce sodium sulfide and water.

[0022] Specifically, the cap 7 is fixed to the surface of the connecting pipe 2, and the cap 7 is limited to the top opening of the connecting pipe 101 by means of a screw knob. At this time, the cap 7 blocks the top of the connecting pipe 101, the input end of the air extraction device is connected to the exhaust pipe 102, and the plug is used to block the drain pipe 104.

[0023] Hydrogen sulfide gas generated from oilfield wastewater is collected. The collected hydrogen sulfide gas is introduced into the tank 1 through the inlet pipe 103. The treatment solution is introduced into the tank 1 through the connecting pipe 2. The treatment solution reacts with the hydrogen sulfide gas inside the tank 1 to remove the hydrogen sulfide gas. The treated solution accumulates inside the tank 1 after the reaction. The treated gas is discharged through the extraction equipment.

[0024] To ensure rapid combination of the treatment solution and hydrogen sulfide gas, the arc-shaped cylinder 3 is oscillated using a oscillating motion. Figures 2 to 5 In the tank body 1, two opposing arc-shaped cylinders 3 are provided on the inner side. The bottom end of the connecting pipe 2 is connected to the center of the concave surface of the arc-shaped cylinder 3 by a flexible hose 301, and the connecting pipe 2 is set as a corrosion-resistant flexible pipe. Multiple atomizing nozzles 4 are provided on the top and bottom surfaces of the arc-shaped cylinders 3. The ends of the arc-shaped cylinders 3 are connected to the two ends of the swing rod 5 by two arc-shaped rods 11. Two side frames 8 are fixed on the top surface of the inner side of the tank body 1. A circular plate 9 is provided inside the side frame 8. The top of the circular plate 9 is connected to the lifting part. Two opposing convex plates 10 are provided on the outer circumference of the circular plate 9. The swing rod 5 is horizontally penetrated through the two convex plates 10. The swing rod 5 is rotated by an elastic element 6 on the convex plate 10. The elastic element 6 is set as a corrosion-resistant spring.

[0025] Both ends of the outer circumference of the swing rod 5 are fixed with locking teeth 12. The surface of the side frame 8 is provided with a vertical groove 13 corresponding to the protrusion plate 10. The outer circumference of the side frame 8 is provided with a rack 14 corresponding to the locking teeth 12. The rack 14 corresponds to the vertical groove 13.

[0026] Specifically, the lifting part is used to make the circular plate 9 move up and down inside the side frame 8. The moving circular plate 9 causes the protruding plate 10 to move synchronously inside the vertical groove 13. When the protruding plate 10 drives the swing rod 5 to move, the moving swing rod 5 causes the locking tooth 12 to move on the surface of the rack 14, and the rack 14 uses the tooth groove to limit the locking tooth 12.

[0027] When the swing rod 5 causes the clasp 12 to move up on the surface of the rack 14, the top surface of the clasp 12 presses against the top surface of the inner side of the tooth groove of the rack 14. Since the rack 14 is fixed on the side frame 8, the upward movement of the clasp 12 causes the swing rod 5 to rotate inside the convex plate 10. At this time, the rotating swing rod 5 uses two arc rods 11 to make the arc cylinder 3 deflect upward until the upward movement of the clasp 12 corresponds to the upper tooth groove of the rack 14. The weight of the arc cylinder 3 itself and the elastic force of the elastic element 6 make the clasp 12 snap into the tooth groove through the swing rod 5, completing the upward swing of the arc cylinder 3.

[0028] When the swing rod 5 causes the clasp 12 to move downward on the surface of the rack 14, the bottom surface of the clasp 12 presses against the bottom surface of the tooth groove of the rack 14. Since the rack 14 is fixed on the side frame 8, the downward movement of the clasp 12 causes the swing rod 5 to rotate inside the protrusion plate 10. At this time, the rotating swing rod 5 uses two arc rods 11 to make the arc cylinder 3 deflect downward until the downward movement of the clasp 12 corresponds to the next tooth groove of the rack 14. The elastic force of the elastic element 6 causes the clasp 12 to lock into the tooth groove through the swing rod 5, completing the downward swing of the arc cylinder 3.

[0029] In this embodiment, the circular plate 9 moves up and down inside the side frame 8 through the lifting part, and the snap-fit ​​between the tooth 12 and the rack 14 is engaged. The elastic force of the elastic element 6 is used to make the arc-shaped cylinder 3 swing up and down inside the tank 1. The multiple atomizing nozzles 4 that swing are used to spray the treatment solution, thereby improving the degree of combination between the treatment solution and the hydrogen sulfide gas.

[0030] To allow the swing arm 5 to rotate inside the convex plate 10, the elastic element 6 drives the plate 15. Figure 3 and Figure 4 In the structure, a flat plate 15 is fixed at the center of the swing rod 5. An arc-shaped groove 16 corresponding to the flat plate 15 is provided on the outer side of the convex plate 10. A bent plate 17 is provided at the center of the arc-shaped groove 16, and the rotating flat plate 15 slides on the surface of the bent plate 17. The elastic element 6 is located inside the arc-shaped groove 16, and the elastic force of the elastic element 6 keeps the flat plate 15 in a horizontal state.

[0031] Specifically, when the convex plate 10 causes the swing rod 5 to move upward, the top surface of the clasp 12 on the surface of the swing rod 5 abuts against the top surface of the inner side of the tooth groove. At this time, the swing rod 5 uses the arc rod 11 to make the arc cylinder 3 swing upward. At this time, the plate 15 rotates inside the arc groove 16 and slides on the surface of the bent plate 17. The rotating plate 15 squeezes the elastic element 6 at the top and pulls the elastic element 6 at the bottom until the upward-moving clasp 12 corresponds to the upper tooth groove of the rack 14. The weight of the arc cylinder 3 and the elastic force of the elastic element 6 pull back the plate 15. Through the reverse rotation of the swing rod 5, the clasp 12 is locked in place with the tooth groove. At this time, the arc cylinder 3 is in a horizontal state again.

[0032] Similarly, when the convex plate 10 causes the swing rod 5 to move downward, the bottom surface of the locking tooth 12 on the surface of the swing rod 5 abuts against the bottom surface of the inner side of the tooth groove. At this time, the swing rod 5 uses the arc rod 11 to make the arc cylinder 3 swing downward. At this time, the plate 15 rotates inside the arc groove 16. The rotating plate 15 squeezes the elastic member 6 at the bottom and pulls the elastic member 6 at the top until the downward-moving locking tooth 12 corresponds to the next tooth groove of the rack 14. The elastic force of the elastic member 6 pulls back the plate 15, and through the swing rod 5, the locking tooth 12 is locked with the tooth groove. At this time, the arc cylinder 3 is in a horizontal state again.

[0033] In this embodiment, the flat plate 15 is defined by the bending plate 17 and the swing rod 5 is defined by the elastic element 6, which facilitates driving the arc-shaped cylinder 3 to return to a horizontal state. When the lifting part stops moving, the stability of the arc-shaped cylinder 3 in the tank 1 is ensured.

[0034] To allow the arc-shaped cylinder 3 to move up and down inside the tank 1, a lifting mechanism is used to move the circular plate 9. Figure 1 and Figure 2 In the middle, the lifting part includes: a vertical rod 18, a curved bar 19 and a driving component 20. The driving component 20 is set as a driving cylinder. The top end of the vertical rod 18 penetrates the top surface of the tank body 1, the bottom end of the vertical rod 18 is inside the side frame 8, and the bottom end of the vertical rod 18 is connected to the center of the top surface of the circular plate 9. The top end of the vertical rod 18 is connected to the curved bar 19. The driving component 20 is installed on the top surface of the tank body 1, and the output end of the driving component 20 is connected to the bottom surface of the curved bar 19.

[0035] Specifically, the drive unit 20 is activated, and the output end of the drive unit 20 causes the curved bar 19 to move up and down on the top of the tank 1. The moving curved bar 19 uses the vertical rod 18 to move the circular plate 9 inside the side frame 8. The movement of the circular plate 9 and the convex plate 10 causes the swing rod 5 and the arc cylinder 3 to move synchronously, which facilitates the up and down movement of the two arc cylinders 3 inside the tank 1, thereby expanding the spraying range of the treatment solution. Example 2:

[0036] This invention also provides a method for treating hydrogen sulfide in oilfield wastewater. Figure 1 and Figure 2The method described above, using the oilfield wastewater hydrogen sulfide treatment equipment, includes the following steps: S1. Using the knob of the cap 7, the opening at the top of the connecting pipe 101 is sealed by the cap 7, and the exhaust pipe 102 is connected to the input end of the gas extraction device, so that the collected hydrogen sulfide gas is introduced into the tank 1 through the inlet pipe 103.

[0037] S2. Use a plug to seal the drain pipe 104 and pass the treatment solution into the arc-shaped cylinder 3 through the flexible tube 301 at the bottom of the connecting pipe 2.

[0038] S3. The lifting unit is used to make the circular plate 9 move up and down inside the side frame 8. The moving circular plate 9 uses the convex plate 10 to make the two arc-shaped cylinders 3 move synchronously. The moving arc-shaped cylinders 3 use multiple atomizing nozzles 4 to spray the treatment solution and use the treatment solution to absorb hydrogen sulfide gas.

[0039] S4. Open the plug of the drain pipe 104. The gas extraction device uses the exhaust pipe 102 to extract the treated gas, and the treatment solution that absorbs hydrogen sulfide gas is discharged through the drain pipe 104, thus completing the treatment of hydrogen sulfide gas.

[0040] Working principle of this invention: Reference Figures 1 to 5 As shown, the cap 7 is fixed to the surface of the connecting pipe 2, and the cap 7 is limited to the top opening of the connecting pipe 101 by means of a screw knob. At this time, the cap 7 blocks the top of the connecting pipe 101, the input end of the air pump is connected to the exhaust pipe 102, and the plug is used to block the drain pipe 104.

[0041] Hydrogen sulfide gas generated from oilfield wastewater is collected and introduced into the tank 1 through the inlet pipe 103. The treatment solution is introduced into the two arc-shaped cylinders 3 through the connecting pipe 2 and the hose 301. The drive unit 20 is activated, and the output end of the drive unit 20 causes the curved bar 19 to move up and down on the top of the tank 1. The moving curved bar 19 uses the vertical rod 18 to move the circular plate 9 inside the side frame 8. The movement of the circular plate 9 and the convex plate 10 causes the swing rod 5 and the arc-shaped cylinder 3 to move synchronously.

[0042] The moving circular plate 9 causes the convex plate 10 to move synchronously inside the vertical groove 13. When the convex plate 10 drives the swing rod 5 to move, the moving swing rod 5 causes the locking tooth 12 to move on the surface of the rack 14, and the rack 14 uses the tooth groove to limit the locking tooth 12.

[0043] When the swing rod 5 causes the clasp 12 to move up on the surface of the rack 14, the top surface of the clasp 12 presses against the top surface of the inner side of the tooth groove of the rack 14. Since the rack 14 is fixed on the side frame 8, the upward movement of the clasp 12 causes the swing rod 5 to rotate inside the convex plate 10. At this time, the rotating swing rod 5 uses two arc rods 11 to make the arc cylinder 3 deflect upward. The plate 15 rotates inside the arc groove 16 and slides on the surface of the bent plate 17. The rotating plate 15 squeezes the elastic element 6 at the top and pulls the elastic element 6 at the bottom until the upward movement of the clasp 12 corresponds to the previous tooth groove of the rack 14. The weight of the arc cylinder 3 itself and the elastic force of the elastic element 6 make the clasp 12 snap into the tooth groove through the swing rod 5, completing the upward swing of the arc cylinder 3.

[0044] When the swing rod 5 causes the locking tooth 12 to move downward on the surface of the rack 14, the bottom surface of the locking tooth 12 presses against the bottom surface of the inner side of the tooth groove of the rack 14. Since the rack 14 is fixed on the side frame 8, the downward moving locking tooth 12 causes the swing rod 5 to rotate inside the convex plate 10. At this time, the rotating swing rod 5 uses two arc rods 11 to make the arc cylinder 3 deflect downward. The plate 15 rotates inside the arc groove 16. The rotating plate 15 squeezes the elastic element 6 at the bottom and pulls the elastic element 6 at the top until the downward moving locking tooth 12 corresponds to the next tooth groove of the rack 14. The elastic force of the elastic element 6 causes the locking tooth 12 to be locked inside the tooth groove through the swing rod 5, completing the downward swing of the arc cylinder 3.

[0045] The movement of the circular plate 9 and the convex plate 10 allows the swing rod 5 and the arc-shaped cylinder 3 to move synchronously, facilitating the up-and-down movement of the two arc-shaped cylinders 3 inside the tank 1 and expanding the spraying range of the treatment solution.

[0046] The treatment solution reacts with the hydrogen sulfide gas inside tank 1, thereby removing the hydrogen sulfide gas. The treated solution accumulates inside tank 1 after the reaction, and the treated gas is discharged through the extraction device. The plug of the drain pipe 104 is opened, and the extraction device uses the exhaust pipe 102 to extract the treated gas, while the treatment solution that absorbed the hydrogen sulfide gas is discharged through the drain pipe 104, completing the treatment of the hydrogen sulfide gas.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A hydrogen sulfide treatment device for oilfield wastewater, characterized in that, include: Tank (1), used for spray treatment of hydrogen sulfide gas; The connecting pipe (2) is vertically inserted into the tank (1) for introducing the treatment solution into the tank (1); Arc-shaped cylinder (3), the number of arc-shaped cylinders (3) is set to two, the two arc-shaped cylinders (3) are arranged opposite to each other, and the bottom end of the connecting pipe (2) is connected to the center of the concave surface of the arc-shaped cylinder (3) by a flexible tube (301); Atomizing nozzles (4) are provided on the top and bottom surfaces of the arc-shaped cylinder (3) for spraying treatment solution into the tank (1); The swing rod (5) is installed at the end of the arc-shaped cylinder (3); The elastic element (6) is mounted on the swing rod (5) to drive the arc-shaped cylinder (3) to swing inside the tank (1).

2. The oilfield wastewater hydrogen sulfide treatment equipment according to claim 1, characterized in that: The top of the tank (1) is provided with a connecting pipe (101), and the connecting pipe (2) is vertically inserted into the inside of the tank (1) through the connecting pipe (101), and the surface of the connecting pipe (2) is covered by the cap (7) knob at the top of the connecting pipe (101).

3. The oilfield wastewater hydrogen sulfide treatment equipment according to claim 2, characterized in that: The surface of the through pipe (101) is provided with an exhaust pipe (102), and the output end of the exhaust pipe (102) is connected to the input end of the air extraction device. An air inlet pipe (103) is provided on the outer circumference of the tank (1), and the collected hydrogen sulfide gas is introduced into the tank (1) through the air inlet pipe (103).

4. The oilfield wastewater hydrogen sulfide treatment equipment according to claim 3, characterized in that: The outer circumference of the tank (1) is provided with a drain pipe (104) for discharging the treatment solution inside the tank (1).

5. The oilfield wastewater hydrogen sulfide treatment equipment according to claim 4, characterized in that: The tank (1) is provided with two side frames (8). The top of the side frame (8) is connected to the inner top surface of the tank (1). The side frame (8) is provided with a circular plate (9). The top of the circular plate (9) is connected to the lifting part. The outer side of the circular plate (9) is provided with two opposing convex plates (10). A swing rod (5) is horizontally passed through both convex plates (10). Both ends of the swing rod (5) are connected to the end of the arc cylinder (3) by an arc rod (11).

6. The oilfield wastewater hydrogen sulfide treatment equipment according to claim 5, characterized in that: Both ends of the outer circumference of the swing rod (5) are fixed with teeth (12), and the surface of the side frame (8) is provided with a vertical groove (13) corresponding to the protrusion plate (10). The outer circumference of the side frame (8) is provided with a rack (14) corresponding to the teeth (12), and the rack (14) corresponds to the vertical groove (13).

7. The oilfield wastewater hydrogen sulfide treatment equipment according to claim 5, characterized in that: A flat plate (15) is fixed at the center of the swing rod (5). An arc groove (16) corresponding to the flat plate (15) is provided on the outer side of the convex plate (10). A curved plate (17) is provided at the center of the arc groove (16). The rotating flat plate (15) slides on the surface of the curved plate (17).

8. The oilfield wastewater hydrogen sulfide treatment equipment according to claim 7, characterized in that: The elastic element (6) is located inside the arc groove (16), and the elastic force of the elastic element (6) keeps the plate (15) in a horizontal state.

9. The oilfield wastewater hydrogen sulfide treatment equipment according to claim 5, characterized in that: The lifting unit includes: a vertical rod (18), a curved bar (19), and a driving component (20). The top of the vertical rod (18) penetrates the top surface of the tank (1), the bottom of the vertical rod (18) is inside the side frame (8), and the bottom of the vertical rod (18) is connected to the center of the top surface of the circular plate (9). The top of the vertical rod (18) is connected to a bent strip (19), and a driving component (20) is installed on the top surface of the tank (1). The output end of the driving component (20) is connected to the bottom surface of the bent strip (19).

10. A method for treating hydrogen sulfide in oilfield wastewater, characterized in that: The method, which uses the oilfield wastewater hydrogen sulfide treatment equipment described in claim 5, includes the following steps: S1. Using the knob of the cap (7) at the top opening of the connecting pipe (101), the cap (7) blocks the top opening of the connecting pipe (101), and the exhaust pipe (102) is connected to the input end of the gas extraction equipment, so that the collected hydrogen sulfide gas is introduced into the tank (1) through the air inlet pipe (103). S2. Use a plug to seal the drain pipe (104) and pass the treatment solution into the arc-shaped cylinder (3) through the hose (301) at the bottom of the connecting pipe (2); S3. The lifting part is used to make the circular plate (9) move up and down inside the side frame (8). The moving circular plate (9) uses the convex plate (10) to make the two arc cylinders (3) move synchronously. The moving arc cylinders (3) use multiple atomizing nozzles (4) to spray the treatment solution and use the treatment solution to absorb hydrogen sulfide gas. S4. Open the plug of the drain pipe (104), the gas extraction device uses the exhaust pipe (102) to extract the treated gas, and the treatment solution that absorbs hydrogen sulfide gas is discharged through the drain pipe (104), thus completing the treatment of hydrogen sulfide gas.

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