Liquid recycling equipment for treating petroleum-contaminated soil

Abstract

The utility model relates to the technical field of petroleum treatment, and discloses a liquid recycling device for petroleum-contaminated soil treatment, which comprises a pretreatment mechanism, a liquid inlet pipe is mounted at the top of the pretreatment mechanism, a circulation mechanism is connected to the right side of the liquid inlet pipe, and a separation mechanism is mounted at the left end of the circulation mechanism. The top of the separation mechanism is connected with the bottom end of the pretreatment mechanism, and a collecting tank is installed at the bottom end of the separation mechanism. According to the liquid recycling equipment, through arrangement of the pretreatment mechanism, the separation mechanism, the circulation mechanism and the collecting tank, after contaminated soil and treatment liquid are mixed, most petroleum is separated out through stirring of stirring blades, and the petroleum recycling efficiency is improved; the residual mixed liquid enters the separation tank, then is subjected to secondary reflux treatment and is heated by the heating plate, the treatment liquid enters the circulation tank to be recycled, and the separated petroleum finally enters the collection tank, so that the utilization rate of the treatment liquid is increased, and the waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil treatment, in particular to a liquid circulation recycling device for treating oil-polluted soil. Background Technique

[0002] Oil-polluted soil refers to the mixture formed by oil and soil generated during oil and gas exploration, exploitation, gathering and transportation, and wastewater treatment, as well as oil-bearing cuttings generated by using oil-based mud during drilling. Oil-bearing polluted soil usually has a certain oil content, is viscous, has a complex particle composition, belongs to a multiphase system, is generally composed of oil-in-water, water-in-oil and solid particles, and has certain flammability at the same time. Sludge with an oil content of more than 5% belongs to hazardous waste. When the existing oil-polluted soil treatment device is in use, the consumption of the treatment liquid is large, the recycling effect of the treatment liquid is poor, the recovery rate is low, it is easy to cause secondary pollution to the environment, and the cost is increased. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the utility model provides a liquid circulation recycling device for treating oil-polluted soil, which has the advantages of facilitating the recycling of the treatment liquid, reducing pollution, and reducing costs, and solves the problems that when the existing oil-polluted soil treatment device is in use, the consumption of the treatment liquid is large, the recycling effect of the treatment liquid is poor, the recovery rate is low, it is easy to cause secondary pollution to the environment, and the cost is increased.

[0005] (2) Technical Solution

[0006] To achieve the purpose of facilitating the recycling of the treatment liquid, reducing pollution, and reducing costs, the utility model provides the following technical solution: A liquid circulation recycling device for treating oil-polluted soil, including a pretreatment mechanism, a liquid inlet pipe is installed at the top of the pretreatment mechanism, a circulation mechanism is connected to the right side of the liquid inlet pipe, a separation mechanism is installed at the left end of the circulation mechanism, the top of the separation mechanism is connected to the bottom end of the pretreatment mechanism, and a collection tank is installed at the bottom end of the separation mechanism.

[0007] Preferably, the pretreatment mechanism includes a pretreatment tank, two liquid inlet holes are opened at the top of the pretreatment tank, the two liquid inlet holes are symmetrically arranged on both sides of the top of the pretreatment tank, a servo motor is installed at the center of the top of the pretreatment tank, a rotating shaft is connected to the bottom of the servo motor, the rotating shaft is arranged inside the pretreatment tank, a stirring blade is installed on the outer side of the rotating shaft, a liquid outlet pipe is installed at the bottom of the pretreatment tank, a filter layer is installed inside the liquid outlet pipe, and a liquid outlet valve is installed at the top of the outer side of the liquid outlet pipe, and a first observation window is installed on the front side of the pretreatment tank.

[0008] Preferably, the top of the liquid inlet hole on the right side is connected to the bottom end of the liquid inlet pipe.

[0009] Preferably, the separation mechanism includes a separation tank. A heater is installed at the top right side of the separation tank. The left end of the heater is connected to a heating plate, and the heating plate is connected to the inner wall of the separation tank. A collection pipe is installed at the bottom of the separation tank, and a collection control valve is installed outside the collection pipe. A secondary return pipe is installed at the bottom left side of the separation tank, and a return valve and a return water pump are installed outside the secondary return pipe. The return water pump is arranged above the return valve. A second observation window is installed at the front side of the separation tank.

[0010] Preferably, the top of the separation tank is connected to the bottom end of the liquid outlet pipe, the top end of the secondary return pipe is connected to the liquid inlet hole on the left side, and the bottom of the collection pipe is connected to the top of the collection tank.

[0011] Preferably, the circulation mechanism includes a circulation tank. A third observation window is installed at the front side of the circulation tank, and a circulation pipe is installed at the top right side of the circulation tank. A circulation control valve and a circulation water pump are installed outside the circulation pipe. The circulation water pump is arranged above the circulation control valve. A steam pipe is installed at the top left side of the circulation tank, and a steam valve is installed outside the steam pipe.

[0012] Preferably, the top end of the circulation pipe is connected to the right side of the liquid inlet pipe, and the left end of the steam pipe is connected to the top right side of the separation tank.

[0013] Preferably, a fourth observation window is installed at the front side of the collection tank.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present utility model provides a liquid circulation and recycling device for treating petroleum-contaminated soil, having the following beneficial effects:

[0016] In this liquid circulation and recycling device, through the setting of the pretreatment mechanism, the separation mechanism, the circulation mechanism and the collection tank, after the contaminated soil is mixed with the treatment liquid and stirred by the stirring blades, most of the petroleum is separated out. The remaining mixed liquid enters the separation tank and is subjected to secondary return treatment. After being heated by the heating plate, the treatment liquid enters the circulation tank for recycling. The separated petroleum finally enters the collection tank, increasing the utilization rate of the treatment liquid, reducing waste and saving costs. The petroleum is separated from the contaminated soil, reducing environmental pollution and increasing the recovery rate of petroleum. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0018] Figure 2It is a schematic cross-sectional structure diagram of the pretreatment mechanism of the present utility model;

[0019] Figure 3 It is a schematic cross-sectional structure diagram of the separation mechanism of the present utility model.

[0020] In the figure: 1. Pretreatment mechanism; 11. Pretreatment tank; 12. Liquid inlet hole; 13. Servo motor; 14. Rotating shaft; 15. Stirring blade; 16. Liquid outlet pipe; 17. Filter layer; 18. Liquid outlet valve; 19. First observation window; 2. Separation mechanism; 21. Separation tank; 22. Heater; 23. Heating plate; 24. Collection pipe; 25. Collection control valve; 26. Secondary reflux pipe; 27. Reflux valve; 28. Reflux water pump; 29. Second observation window; 3. Circulation mechanism; 31. Circulation tank; 32. Third observation window; 33. Circulation pipe; 34. Circulation control valve; 35. Circulation water pump; 36. Steam pipe; 37. Steam valve; 4. Collection tank; 41. Fourth observation window; 5. Liquid inlet pipe. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 3 , a liquid circulation and recycling device for treating petroleum-contaminated soil, including a pretreatment mechanism 1. A liquid inlet pipe 5 is installed at the top of the pretreatment mechanism 1. The right side of the liquid inlet pipe 5 is connected to a circulation mechanism 3. The left end of the circulation mechanism 3 is installed with a separation mechanism 2. The top of the separation mechanism 2 is connected to the bottom end of the pretreatment mechanism 1, and a collection tank 4 is installed at the bottom end of the separation mechanism 2. Specifically, the pretreatment mechanism 1 is used for treating petroleum-contaminated soil to separate petroleum liquid from soil solids. The separation mechanism 2 is used for liquid separation. The circulation mechanism 3 is used for circulating and recycling the treatment liquid to reduce waste. The collection tank 4 is used for collecting the residual petroleum in the liquid to improve work efficiency. The liquid inlet pipe 5 adds the treatment liquid into the pretreatment mechanism 1 to facilitate the separation of petroleum.

[0023] The pretreatment mechanism 1 includes a pretreatment tank 11. Two liquid inlet holes 12 are opened at the top of the pretreatment tank 11. The two liquid inlet holes 12 are symmetrically arranged on both sides of the top of the pretreatment tank 11. A servo motor 13 is installed at the center of the top of the pretreatment tank 11. The bottom of the servo motor 13 is connected to a rotating shaft 14. The rotating shaft 14 is arranged inside the pretreatment tank 11, and stirring blades 15 are installed on the outer side of the rotating shaft 14. A liquid outlet pipe 16 is installed at the bottom of the pretreatment tank 11. A filter layer 17 is installed inside the liquid outlet pipe 16, and a liquid outlet valve 18 is installed at the top outer side of the liquid outlet pipe 16. A first observation window 19 is installed on the front side of the pretreatment tank 11. The top of the right liquid inlet hole 12 is connected to the bottom end of the liquid inlet pipe 5. The settings of the servo motor 13, the rotating shaft 14 and the stirring blades 15 enable the treatment liquid and the contaminated soil to be fully mixed, so that the petroleum is separated from the contaminated soil. The filter layer 17 filters the solid particles in the mixed liquid to avoid affecting the separation of the liquid. The first observation window 19 is convenient for observing the situation inside the pretreatment tank 11.

[0024] The separation mechanism 2 includes a separation tank 21. A heater 22 is installed at the top right of the separation tank 21. The left end of the heater 22 is connected to a heating plate 23. The heating plate 23 is connected to the inner wall of the separation tank 21. A collection pipe 24 is installed at the bottom of the separation tank 21. A collection control valve 25 is installed on the outer side of the collection pipe 24. A secondary reflux pipe 26 is installed at the bottom left of the separation tank 21. A reflux valve 27 and a reflux water pump 28 are installed on the outer side of the secondary reflux pipe 26. The reflux water pump 28 is arranged above the reflux valve 27. A second observation window 29 is installed on the front side of the separation tank 21. The top of the separation tank 21 is connected to the bottom end of the liquid outlet pipe 16. The top end of the secondary reflux pipe 26 is connected to the left liquid inlet hole 12. The setting of the secondary reflux pipe 26 enables the mixed treatment liquid to enter the pretreatment tank 11 again for stirring again, so that the petroleum can be fully separated, and the usage amount of the treatment liquid is reduced, and the cost is lowered. The heating plate 23 heats to evaporate the treatment liquid and separate it from the petroleum, which is convenient for collection and recycling. The second observation window 29 is convenient for observing the situation inside the separation tank 21.

[0025] The circulation mechanism 3 includes a circulation tank 31. A third observation window 32 is installed on the front side of the circulation tank 31. A circulation pipe 33 is installed at the top right of the circulation tank 31. A circulation control valve 34 and a circulation water pump 35 are installed on the outer side of the circulation pipe 33. The circulation water pump 35 is arranged above the circulation control valve 34. A steam pipe 36 is installed at the top left of the circulation tank 31. A steam valve 37 is installed on the outer side of the steam pipe 36. The top end of the circulation pipe 33 is connected to the right side of the liquid inlet pipe 5. The left end of the steam pipe 36 is connected to the top right of the separation tank 21. The evaporated treatment liquid enters the circulation tank 31 from the steam pipe 36, undergoes condensation treatment, and enters the pretreatment tank 11 from the circulation pipe 33, so that the recycling rate is increased and waste is reduced. The setting of the third observation window 32 is convenient for observing the situation inside the circulation tank 31.

[0026] A fourth observation window 41 is installed on the front side of the collection tank 4. The top of the collection tank 4 is connected to the bottom of the collection pipe 24. The collection tank 4 is used for collecting petroleum. The setting of the fourth observation window 41 facilitates observing the situation inside the collection tank 4.

[0027] During use, first, all the valves of the device are in a closed state. The crushed petroleum-contaminated soil is added to the pretreatment tank 11, and an appropriate amount of treatment liquid is added from the liquid inlet pipe 5. The servo motor 13 is started, and the rotating shaft 14 drives the stirring blades 15 to rotate to fully mix the treatment liquid and the contaminated soil. After a period of time, part of the used material floats on the top and is recycled. The liquid outlet valve 18 is opened, and the mixed liquid of petroleum and the treatment liquid enters the separation tank 21 after passing through the filter layer 17. The reflux valve 27 and the reflux water pump 28 are opened, and the mixed liquid is added to the pretreatment tank 11 again. An appropriate amount of new treatment liquid is added, and they are stirred and mixed again. Then the mixed liquid enters the separation tank 21. The heater 22 causes the heating plate 23 to heat the mixed liquid. After reaching a certain temperature, the treatment liquid starts to evaporate first. The steam valve 37 is opened, and the treatment liquid steam enters the circulation tank 31. After a period of time, the steam valve 37 is closed. The remaining petroleum in the separation tank 21 enters the collection tank 4 through the collection pipe 24, and the circulation tank 31 is subjected to condensation treatment. The treatment liquid is liquefied. The circulation water pump 35 and the circulation control valve 34 are opened, and the treatment liquid enters the pretreatment tank 11 through the circulation pipe 33 for the next use.

[0028] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid recycling and reuse device for treating petroleum-contaminated soil, comprising a pretreatment mechanism (1), characterized in that: A liquid inlet pipe (5) is installed on the top of the pretreatment mechanism (1), a circulation mechanism (3) is connected to the right side of the liquid inlet pipe (5), a separation mechanism (2) is installed on the left end of the circulation mechanism (3), the top of the separation mechanism (2) is connected to the bottom of the pretreatment mechanism (1), and a collection tank (4) is installed at the bottom of the separation mechanism (2); The circulation mechanism (3) comprises a circulation tank (31), a third observation window (32) is installed on the front side of the circulation tank (31), a circulation pipe (33) is installed on the right side of the top of the circulation tank (31), a circulation control valve (34) and a circulation water pump (35) are installed on the outside of the circulation pipe (33), and the circulation water pump (35) is arranged above the circulation control valve (34), a steam pipe (36) is installed on the left side of the top of the circulation tank (31), and a steam valve (37) is installed on the outside of the steam pipe (36); The top end of the circulation pipe (33) is connected to the right side of the liquid inlet pipe (5), and the left end of the steam pipe (36) is connected to the top right side of the separation tank (21).

2. The liquid recycling and recovery equipment for treating petroleum-contaminated soil according to claim 1, characterized in that: The pretreatment mechanism (1) comprises a pretreatment tank (11), the top of the pretreatment tank (11) is provided with two liquid inlet holes (12), the two liquid inlet holes (12) are symmetrically arranged on both sides of the top of the pretreatment tank (11), a servo motor (13) is installed at the center of the top of the pretreatment tank (11), the bottom of the servo motor (13) is connected with a rotating shaft (14), the rotating shaft (14) is arranged inside the pretreatment tank (11), and a stirring blade (15) is installed on the outside of the rotating shaft (14), a liquid outlet pipe (16) is installed at the bottom of the pretreatment tank (11), a filter layer (17) is installed inside the liquid outlet pipe (16), and a liquid outlet valve (18) is installed on the top of the outer side of the liquid outlet pipe (16), and a first observation window (19) is installed on the front side of the pretreatment tank (11).

3. The liquid recycling and recovery equipment for treating petroleum-contaminated soil according to claim 2, characterized in that: The top of the liquid inlet hole (12) on the right side is connected to the bottom end of the liquid inlet pipe (5).

4. The liquid recycling and recovery equipment for treating petroleum-contaminated soil according to claim 1, characterized in that: The separation mechanism (2) comprises a separation tank (21), a heater (22) is installed on the top right side of the separation tank (21), a heating plate (23) is connected to the left end of the heater (22), and the heating plate (23) is connected to the inner wall of the separation tank (21), a collecting pipe (24) is installed at the bottom of the separation tank (21), and a collecting control valve (25) is installed on the outer side of the collecting pipe (24), a secondary reflux pipe (26) is installed at the bottom left side of the separation tank (21), and a reflux valve (27) and a reflux water pump (28) are installed on the outer side of the secondary reflux pipe (26), and the reflux water pump (28) is arranged above the reflux valve (27), and a second observation window (29) is installed on the front side of the separation tank (21).

5. The liquid recycling and recovery equipment for treating petroleum-contaminated soil according to claim 4, characterized in that: The top of the separation tank (21) is connected to the bottom end of the liquid outlet pipe (16), the top end of the secondary reflux pipe (26) is connected to the liquid inlet hole (12) on the left side, and the bottom of the collection pipe (24) is connected to the top of the collection tank (4).

6. The liquid recycling and recovery equipment for treating petroleum-contaminated soil according to claim 1, characterized in that: A fourth observation window (41) is installed on the front side of the collection tank (4).

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