Petroleum-polluted underground water purification device

Abstract

The utility model provides a petroleum polluted underground water purification device, which relates to the technical field of polluted water treatment and comprises a treatment tank, a top cover is mounted at the top of the treatment tank, and a first water level sensor is mounted at the top of the top cover close to the left side. According to the utility model, the first water level sensor is matched with the second electromagnetic valve, so that the water dirt capacity in the treatment tank can be accurately controlled, and the second water level sensor, the third electromagnetic valve and the fourth electromagnetic valve are matched, so that the reaction agent capacity in the material tank can be accurately controlled; reaction agents with fixed capacities can be sequentially discharged into the treatment tank to react with underground water by opening a fourth electromagnetic valve and closing a third electromagnetic valve, the overall structure is reasonable, and the proportion of the underground water to the reaction agents can be reasonably controlled in the mode that the reaction agents are sequentially added into the treatment tank through the four material tanks with the fixed capacities. Therefore, resource waste is avoided, and the underground water purification effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of polluted water treatment, in particular to a petroleum-contaminated groundwater purification device. Background Art

[0002] Oilfield contaminated groundwater mainly comes from the oil-containing contaminated groundwater generated during drilling, oilfield production water, and well washing in oil and gas extraction. If the oil-containing contaminated groundwater in the oilfield is not treated in time, it will have a serious impact on the environment.

[0003] When purifying oil-contaminated groundwater, it is necessary to extract and collect it, and then add multiple reaction reagents in sequence to react so that the water and pollutants can be separated to achieve the purpose of purification. However, in the prior art, when adding reaction reagents to oil-contaminated groundwater, it is impossible to accurately control the mixing ratio between each additive and groundwater. When the ratio is unbalanced, it will lead to a decrease in purification effect or waste of data. Therefore, we propose a new type of oil-contaminated groundwater purification device. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that when adding reaction reagents to oil-contaminated groundwater, the mixing ratio between each additive and groundwater cannot be accurately controlled, and when the ratio is unbalanced, it will lead to a decrease in purification effect or waste of data. A petroleum-contaminated groundwater purification device is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a petroleum-contaminated groundwater purification device, comprising a treatment tank, a top cover is installed on the top of the treatment tank, a first water level sensor is installed at the top of the top cover near the left side, the detection end of the first water level sensor passes through the top of the top cover and extends to the bottom, four injection mechanisms are arranged on the right side of the treatment tank, the four injection mechanisms all include a material tank, a connecting pipe is fixedly connected to the bottom of the material tank, the end of the connecting pipe is fixedly connected to the treatment tank, a fourth solenoid valve is matched with the outside of the connecting pipe, a ventilation pipe is fixedly connected at the center of the top of the material tank, a second water level sensor is installed at the top of the material tank near the edge, the outer surface of the material tank is fixedly connected to a delivery pipe, and a third solenoid valve is matched with the outside of the delivery pipe.

[0006] Preferably, the bottom of the processing tank is fixedly connected with a slag discharge port, and a control valve is arranged outside the slag discharge port.

[0007] Preferably, a drain pipe is fixedly connected to the outer surface of the processing tank near the middle, and a first solenoid valve is installed on the top of the drain pipe.

[0008] Preferably, a water pipe is fixedly connected to the top of the top cover near the right side, and a second solenoid valve is installed on the top of the water pipe.

[0009] Preferably, a motor is fixedly mounted at the top center of the top cover, and the output end of the motor slides through the top of the top cover and extends downward.

[0010] Preferably, the output end of the motor is fixedly connected to a stirring shaft, and the outer surface of the stirring shaft is fixedly connected to multiple groups of stirring rods.

[0011] Preferably, a support frame is fixedly connected to the outer surface of the processing tank near the right side, and the bottoms of the four material tanks are connected to the top of the support frame.

[0012] Preferably, outer surfaces of the four connecting pipes all pass through the top of the support frame and extend downward, and a plurality of supporting legs are fixedly connected to the bottom of the processing tank at equal intervals.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, the first water level sensor and the second solenoid valve cooperate to accurately control the water pollution capacity in the treatment tank. The second water level sensor, the third solenoid valve and the fourth solenoid valve cooperate to accurately control the reaction agent capacity inside the material tank. By opening the fourth solenoid valve and closing the third solenoid valve, the reaction agent of a fixed capacity can be discharged into the treatment tank in sequence to react with the groundwater. The overall structure is reasonable. The ratio of groundwater to reaction agent can be reasonably controlled by sequentially adding reaction agents to the treatment tank through four material tanks with fixed capacities, thereby avoiding waste of resources while ensuring the groundwater purification effect.

[0015] 2. In the utility model, during the reaction of groundwater and reaction agent, the starting motor can drive the stirring shaft to rotate at a high speed. When the stirring shaft rotates at a high speed, it will drive the stirring rod on the surface to stir the groundwater and reaction agent in the treatment tank, so that they are fully in contact with each other, thereby increasing the reaction rate and further improving the purification efficiency of petroleum-contaminated groundwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a petroleum-contaminated groundwater purification device proposed for the utility model;

[0017] Figure 2 A partial structural schematic diagram of a petroleum-contaminated groundwater purification device is proposed for the utility model;

[0018] Figure 3 Another structural schematic diagram of a petroleum-contaminated groundwater purification device proposed by the utility model;

[0019] Figure 4 The utility model provides a schematic structural diagram of a material injection mechanism of a petroleum-contaminated groundwater purification device.

[0020] Legend: 1. Processing tank; 11. Slag discharge port; 12. Control valve; 13. Support leg; 2. Drain pipe; 21. First solenoid valve; 22. Support frame; 3. Top cover; 31. Motor; 32. First water level sensor; 33. Stirring shaft; 34. Stirring rod; 4. Water pipe; 41. Second solenoid valve; 5. Injection mechanism; 501. Material tank; 502. Delivery pipe; 503. Connecting pipe; 504. Second water level sensor; 505. Third solenoid valve; 506. Fourth solenoid valve; 507. Ventilation pipe. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Embodiment 1, as Figure 1-Figure 4 As shown, the utility model provides a petroleum-contaminated groundwater purification device, including a treatment tank 1, a top cover 3 is installed on the top of the treatment tank 1, a first water level sensor 32 is installed near the left side of the top of the top cover 3, the detection end of the first water level sensor 32 passes through the top of the top cover 3 and extends to the bottom, four injection mechanisms 5 are arranged on the right side of the treatment tank 1, the four injection mechanisms 5 all include a material tank 501, a connecting pipe 503 is fixedly connected to the bottom of the material tank 501, the end of the connecting pipe 503 is fixedly connected to the treatment tank 1, a fourth solenoid valve 506 is matched with the outside of the connecting pipe 503, and a fourth solenoid valve 506 is arranged on the top of the material tank 501. A ventilation pipe 507 is fixedly connected at the center, a second water level sensor 504 is installed at the top near the edge of the material tank 501, a delivery pipe 502 is fixedly connected to the outer surface of the material tank 501, and a third solenoid valve 505 is arranged on the outside of the delivery pipe 502, a slag discharge port 11 is fixedly connected to the bottom of the processing tank 1, and a control valve 12 is arranged on the outside of the slag discharge port 11, a drain pipe 2 is fixedly connected to the outer surface of the processing tank 1 near the middle, and a first solenoid valve 21 is installed on the top of the drain pipe 2, a water supply pipe 4 is fixedly connected to the top of the top cover 3 near the right side, and a second solenoid valve 41 is installed on the top of the water supply pipe 4.

[0024] The effect achieved by the entire embodiment 1 is that when purifying oil-contaminated groundwater, it is pumped out through the pumping well and then sent to the treatment tank 1 through the water pipe 4. When the groundwater inside the treatment tank 1 reaches a specified amount, the first water level sensor 32 will send a closing signal to the second solenoid valve 41 to stop sending groundwater to the treatment tank 1. At the same time, after sending a start signal to the four fourth solenoid valves 506 in sequence, the sodium hydroxide demulsification and oil removal in the first material tank 501 will be completely discharged into the treatment tank 1 through the connecting pipe 503 to react with the oil field groundwater. After the reaction, precipitates and water-soluble substances are generated. Then, the polyiron sulfide in the second tank 501 will be discharged into the treatment tank 1 through the connecting pipe 503 to react with the groundwater to adjust the pH value to neutral. Then, the polyaluminum hydride in the third tank 501 will be discharged into the treatment tank 1 through the connecting pipe 503 to make the groundwater mud and water stratification. Finally, the cationic polyacrylamide in the fourth tank 501 will be discharged into the treatment tank 1 through the connecting pipe 503 to make the stratified mud clump and precipitate quickly, thereby The oilfield groundwater is separated, and then the upper clean water is reinjected through the drainage pipe 2, and the pollutants are discharged through the slag discharge port 11. Then the second solenoid valve 41 is opened and the groundwater is re-injected. During the process, the third solenoid valve 505 is opened, and the fourth solenoid valve 506 is closed. After the reaction reagents in the four material tanks 501 are filled through the delivery pipe 502, the second water level sensor 504 will detect the capacity of the reaction reagents in the material tank 501 and control the third solenoid valve 505 to be closed again. Then, the above steps are repeated to continuously purify the groundwater. The overall structure is reasonable. The ratio of groundwater and reaction reagents can be reasonably controlled by sequentially adding reaction reagents to the treatment tank 1 through four material tanks 501 with fixed capacities, thereby avoiding waste of resources while ensuring the groundwater purification effect. The first solenoid valve 21 is mainly used to control the opening and closing of the drainage pipe 2, the control valve 12 is mainly used to control the opening and closing of the slag discharge port 11, and the vent pipe 507 is mainly used to play a ventilation role, so that the air pressure inside the material tank 501 is consistent with the external air pressure, which is convenient for the circulation of reaction reagents.

[0025] Embodiment 2, as Figure 1-Figure 4 As shown, the difference between this embodiment and embodiment 1 is that a motor 31 is fixedly installed at the top center of the top cover 3, the output end of the motor 31 slides through the top of the top cover 3 and extends to the bottom, the output end of the motor 31 is fixedly connected to a stirring shaft 33, the outer surface of the stirring shaft 33 is fixedly connected to a plurality of stirring rods 34, the outer surface of the processing tank 1 is fixedly connected to a support frame 22 near the right side, the bottoms of the four material tanks 501 are connected to the top of the support frame 22, the outer surfaces of the four connecting pipes 503 penetrate the top of the support frame 22 and extend to the bottom, and the bottom of the processing tank 1 is fixedly connected to a plurality of support legs 13 at equal intervals.

[0026] The effect achieved by the entire embodiment 2 is that during the reaction of groundwater and reaction agents, the starting motor 31 can drive the stirring shaft 33 to rotate at a high speed. When the stirring shaft 33 rotates at a high speed, it will drive the stirring rod 34 on the surface to stir the groundwater and reaction agents in the treatment tank 1, so that they are fully in contact and the reaction rate is increased, thereby improving the purification efficiency of petroleum-contaminated groundwater. The support legs 13 are mainly used to support the device off the ground, and the support frame 22 is mainly used to support four material tanks 501.

[0027] Working principle: When purifying oil-contaminated groundwater, it is pumped out through the pumping well and then sent to the treatment tank 1 through the water pipe 4. When the groundwater inside the treatment tank 1 reaches the specified amount, the first water level sensor 32 will send a closing signal to the second solenoid valve 41 to stop sending groundwater to the treatment tank 1. At the same time, after sending a start signal to the four fourth solenoid valves 506 in turn, the sodium hydroxide demulsification and oil removal in the first material tank 501 will be discharged into the treatment tank 1 through the connecting pipe 503 to react with the oil field groundwater to generate precipitates and water-soluble substances. Then, the polyferric sulfide in the second tank 501 will be discharged into the treatment tank 1 through the connecting pipe 503 to react with the groundwater to adjust the pH value to neutral. Then, the polyaluminium hydride in the third tank 501 will be discharged into the treatment tank 1 through the connecting pipe 503 to make the groundwater mud-water stratification. Finally, the cationic polyacrylamide in the fourth tank 501 will be discharged into the treatment tank 1 through the connecting pipe 503 to make the stratified mud clump and precipitate quickly, thereby causing water-pollution separation in the oilfield polluted groundwater. Then, the clean water in the upper layer is reinjected through the drainage pipe 2, and the pollutants are discharged through the slag discharge port 11. Then, the second solenoid valve 41 is opened and the groundwater is re-injected. During the process, the third solenoid valve 505 is opened, and the fourth solenoid valve 506 is closed. After the reaction reagents in the four material tanks 501 are filled through the delivery pipe 502, the second water level sensor 504 will detect the capacity of the reaction reagents in the material tank 501 and control the third solenoid valve 505 to be closed again. Then, the above steps are repeated to continuously purify the groundwater. The overall structure is reasonable. The method of adding reaction reagents to the treatment tank 1 in sequence through four material tanks 501 with fixed capacities can reasonably control the ratio of groundwater and reaction reagents, thereby avoiding waste of resources while ensuring the groundwater purification effect. In addition, during the reaction process of groundwater and reaction reagents, the starting motor 31 can drive the stirring shaft 33 to rotate at a high speed. When the stirring shaft 33 rotates at a high speed, it will drive the stirring rod 34 on the surface to stir the groundwater and reaction reagents in the treatment tank 1, so that they are fully in contact and the reaction rate is increased, thereby improving the purification efficiency of petroleum-contaminated groundwater.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A petroleum-contaminated groundwater purification device, comprising a treatment tank (1), characterized in that: A top cover (3) is installed on the top of the processing tank (1); a first water level sensor (32) is installed on the top of the top cover (3) near the left side; a detection end of the first water level sensor (32) passes through the top of the top cover (3) and extends downward; and four injection mechanisms (5) are arranged on the right side of the processing tank (1); The four injection mechanisms (5) all include a material tank (501), the bottom of the material tank (501) is fixedly connected to a connecting pipe (503), the end of the connecting pipe (503) is fixedly connected to the processing tank (1), the outside of the connecting pipe (503) is equipped with a fourth solenoid valve (506), the top center of the material tank (501) is fixedly connected to a ventilation pipe (507), the top of the material tank (501) is installed with a second water level sensor (504) near the edge, the outer surface of the material tank (501) is fixedly connected to a delivery pipe (502), and the outside of the delivery pipe (502) is equipped with a third solenoid valve (505).

2. The petroleum-contaminated groundwater purification device according to claim 1, characterized in that: The bottom of the processing tank (1) is fixedly connected to a slag discharge port (11), and a control valve (12) is arranged outside the slag discharge port (11).

3. The petroleum-contaminated groundwater purification device according to claim 2, characterized in that: A drainage pipe (2) is fixedly connected to the outer surface of the treatment tank (1) near the middle, and a first solenoid valve (21) is installed on the top of the drainage pipe (2).

4. The petroleum-contaminated groundwater purification device according to claim 3, characterized in that: A water pipe (4) is fixedly connected to the top of the top cover (3) near the right side, and a second solenoid valve (41) is installed on the top of the water pipe (4).

5. The petroleum-contaminated groundwater purification device according to claim 4, characterized in that: A motor (31) is fixedly mounted at the top center of the top cover (3), and an output end of the motor (31) slides through the top of the top cover (3) and extends downward.

6. The petroleum-contaminated groundwater purification device according to claim 5, characterized in that: The output end of the motor (31) is fixedly connected to a stirring shaft (33), and the outer surface of the stirring shaft (33) is fixedly connected to multiple groups of stirring rods (34).

7. The petroleum-contaminated groundwater purification device according to claim 6, characterized in that: A support frame (22) is fixedly connected to the outer surface of the processing tank (1) near the right side, and the bottoms of the four material tanks (501) are all connected to the top of the support frame (22).

8. The petroleum-contaminated groundwater purification device according to claim 7, characterized in that: The outer surfaces of the four connecting pipes (503) all penetrate the top of the support frame (22) and extend downward, and a plurality of supporting legs (13) are fixedly connected to the bottom of the processing tank (1) at equal intervals.

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