Dosing and mixing device for oilfield sewage treatment

Abstract

The utility model relates to a dosing and mixing device for oil field sewage treatment, which comprises a mixing box used for containing oil field sewage, a stirring component arranged in the mixing box, and a dosing component communicated with fluid in the mixing box through the stirring component, a blowing component is further arranged in the mixing box, the air blowing assembly penetrates through the stirring assembly and enables the mixing box to be communicated with external air, and the air blowing assembly is configured to blow air into the mixing box from the bottom of the mixing box. When the stirring assembly transversely stirs the oil field sewage and the chemical agent in the mixing box, gas blown in by the blowing assembly moves upwards from the bottom of the sewage in a bubble form and continuously and longitudinally turns over the oil field sewage and the chemical agent, so that the sewage and the chemical agent are rapidly and uniformly mixed, and the treatment efficiency of the oil field sewage is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield sewage treatment, in particular to a drug adding and mixing device used for oilfield sewage treatment. Background Art

[0002] A large amount of oilfield wastewater is generated in every link of oilfield production, and the oilfield wastewater contains a large amount of harmful substances such as acidic ions, oily substances, suspended particles, etc. In order to reduce the pollution of oilfield wastewater to the environment, the oilfield wastewater must be harmlessly treated. In the prior art, the more commonly used oilfield wastewater treatment method is to add various chemical agents to the wastewater, use chemical reactions to adjust the pH value of the wastewater, remove harmful substances and adsorb suspended particles, so as to achieve the purpose of purifying water quality.

[0003] In the prior art, most chemical agents are added by siphon dosing. However, the siphon dosing method is not ideal for the uniformity of mixing the chemical solution and sewage. Sewage and chemical agents cannot be mixed quickly and effectively, which affects the efficiency of oilfield sewage treatment and cannot meet the needs of actual production. Utility Model Content

[0004] Based on the above problems existing in the prior art, the utility model provides a dosing and mixing device for oilfield wastewater treatment, which can quickly and effectively mix chemicals and wastewater to improve the treatment efficiency of oilfield wastewater.

[0005] The utility model adopts a technical solution to solve the technical problem, which is to provide a dosing and mixing device for oilfield sewage treatment, comprising a mixing box configured to contain oilfield sewage, a stirring assembly arranged in the mixing box, and a dosing assembly connected to the mixing box fluid through the stirring assembly.

[0006] Wherein, a blowing assembly is also arranged in the mixing box to connect the mixing box with external gas. The blowing assembly is constructed to penetrate the stirring assembly and blow gas into the oilfield sewage in the mixing box from the bottom of the mixing box.

[0007] Furthermore, the mixing box includes a shell defining an inner cavity and a cover body disposed on the shell, and the cover body is provided with a mounting hole for mounting the stirring assembly.

[0008] Furthermore, the blowing assembly includes an air delivery pipe inserted into the mixing box through the mounting hole, an air pump arranged at one end of the air delivery pipe located outside the shell, and an air distribution pipe arranged at one end of the air delivery pipe located at the bottom of the shell.

[0009] Wherein, the gas distribution pipe is configured to connect the inner cavity with the external gas through the air pump, the gas delivery pipe and a plurality of gas nozzles installed on the gas distribution pipe.

[0010] Furthermore, both ends of the gas distribution pipe are blocking structures, and the plurality of gas nozzles are installed on the pipe wall of the gas distribution pipe and are configured to be able to blow gas into the oilfield sewage in the shell.

[0011] Furthermore, the cover body is also provided with a liquid inlet pipe for injecting oilfield sewage into the shell, and a filter element for filtering oilfield sewage is detachably installed in the liquid inlet pipe.

[0012] Furthermore, the stirring assembly includes a rotating tube which is rotatably sealed and installed at the installation hole, a connecting tube connecting the rotating tube and the inner cavity, and a motor.

[0013] Wherein, the motor is configured to drive the rotating tube and the connecting tube to rotate around the central axis of the rotating tube.

[0014] Furthermore, a driving gear is provided at the output end of the motor, a driven gear is provided on the rotating tube, and the driving gear and the driven gear are meshed for transmission.

[0015] Furthermore, one end of the connecting tube away from the rotating tube is a blocking structure, and a through hole for connecting the inner cavity and the dosing assembly is opened on the circumferential side wall of the connecting tube.

[0016] Furthermore, the dosing assembly includes a medicine storage box for containing chemical agents, and a medicine injection pipe connecting the medicine storage box and the rotating pipe.

[0017] Among them, one end of the medicine injection tube is connected with the medicine storage box through the pump body, and the other end of the medicine injection tube is inserted into the installation hole and is rotatably sealed and connected with the rotating tube.

[0018] Furthermore, a first sealed bearing and a second sealed bearing are respectively provided on the inner and outer sides of the rotating tube.

[0019] The first sealing bearing is configured to form a rotational sealing connection between the rotating tube and the injection tube, and the second sealing bearing is configured to form a rotational sealing connection between the rotating tube and the cover body.

[0020] The utility model has the following beneficial effects: the utility model provides a dosing and mixing device for oilfield sewage treatment, comprising a mixing box configured to contain oilfield sewage, a stirring assembly arranged in the mixing box, and a dosing assembly connected to the mixing box fluid through the stirring assembly, wherein a blowing assembly is also arranged in the mixing box, wherein the blowing assembly penetrates the stirring assembly and connects the mixing box with the external gas, and the blowing assembly is configured to blow gas into the mixing box from the bottom of the mixing box. While the stirring assembly horizontally stirs the oilfield sewage and chemical agents in the mixing box, the gas blown in by the blowing assembly moves upward in the form of bubbles from the bottom of the sewage and continuously turns the oilfield sewage and chemical agents vertically, thereby quickly mixing the sewage and chemical agents evenly, and improving the treatment efficiency of the oilfield sewage.

[0021] In addition, since the dosing component adds chemicals into the oilfield wastewater through the stirring component, on the one hand, the chemicals can be quickly dispersed into the oilfield wastewater, and on the other hand, it avoids opening a new channel for adding chemicals on the mixing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 Shown is a front view structural schematic diagram of a dosing and mixing device used for oilfield wastewater treatment.

[0024] Figure 2 Shown Figure 1 A cross-sectional view of a dosing and mixing device used for oilfield wastewater treatment.

[0025] Figure 3 Shown Figure 2 A partial enlarged view of the dosing and mixing device used for oilfield wastewater treatment.

[0026] Among them, the reference numerals in the figure are: 10, mixing box; 11, shell; 110, inner cavity; 111, drain pipe; 112, drain valve; 12, cover body; 121, liquid inlet pipe; 122, mounting hole; 123, protrusion; 124, filter element; 125, lifting part;

[0027] 20. Dosing assembly; 21. Drug storage box; 22. Drug injection pipe; 23. Pump body;

[0028] 30. stirring assembly; 31. rotating tube; 32. connecting tube; 321. through hole; 33. motor; 331. driving gear; 332. driven gear; 34. first sealed bearing; 35. second sealed bearing;

[0029] 40. Blowing assembly; 41. Air pipe; 42. Air pump; 43. Air distribution pipe; 44. Air nozzle. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the composition related to the utility model. Obviously, the described embodiment is a part of the embodiment 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 making creative work are within the scope of protection of the utility model.

[0031] refer to Figure 1 and Figure 2 As shown, the utility model provides a dosing and mixing device for oilfield wastewater treatment, comprising a mixing box 10 for temporarily containing oilfield wastewater, a stirring assembly 30 disposed in the mixing box 10, and a dosing assembly 20 in fluid communication with the mixing box 10. The dosing assembly 20 injects pre-prepared chemical agents into the mixing box 10, and the stirring assembly 30 quickly and effectively mixes the chemical agents and wastewater uniformly.

[0032] In some embodiments, the mixing box 10 includes a shell 11 with an opening at one end, a cover body 12 covering the opening of the shell 11, and an inner cavity 110 defined by the shell 11. A drain pipe 111 connecting the inner cavity 110 with the outside is provided at the lower part of the shell 11, and a drain valve 112 is provided on the drain pipe 111. The drain valve 112 can control the connection state of the drain pipe 111. The cover body 12 is provided with an inlet pipe 121 connecting the inner cavity 110 with the outside. The end of the inlet pipe 121 away from the cover body 12 is roughly funnel-shaped, which is convenient for connection with a pipe for injecting sewage into the shell 11. The cover body 12 is also provided with a mounting hole 122 for installing a stirring assembly 30 and for injecting chemical agents.

[0033] In some embodiments, the housing 11 is made of a transparent material, such as tempered glass or acrylic plate. The technician can observe the amount of sewage treated in the inner cavity 110 through the housing 11, thereby conveniently controlling the amount of chemical agents added and conveniently observing the degree of treatment of the sewage by the chemical agents. It is understandable that in other embodiments, the housing 11 is not limited to being made entirely of transparent materials. Part of the housing 11 is made of a transparent material, and the rest of the housing 11 is made of an opaque material, as long as the technician can observe the internal conditions of the housing 11.

[0034] In some of the embodiments, a filter element 124 is disposed in the liquid inlet pipe 121 to facilitate preliminary filtering of some solid particles in the sewage.

[0035] In a specific embodiment, a protrusion 123 is provided on the inner wall of the liquid inlet pipe 121. The edge of the filter element 124 can abut against the protrusion 123 to prevent the filter element 124 from falling into the inner cavity 110. A lifting portion 125 is provided on the side of the filter element 124 away from the inner cavity 110, which can facilitate technicians to remove the filter element 124 from the liquid inlet pipe 121, so as to facilitate the replacement of the filter element 124.

[0036] Combination Figure 2 As shown, in some embodiments, the dosing assembly 20 includes a medicine storage box 21 disposed on one side of the shell 11 for containing chemical agents, a medicine injection pipe 22 connecting the internal chamber of the medicine storage box 21 and the inner cavity 110, and a pump body 23 disposed between the medicine injection pipe 22 and the medicine storage box 21. The medicine injection pipe 22 is generally U-shaped. One end of the medicine injection pipe 22 is connected to the pump body 23, and the other end of the medicine injection pipe 22 is inserted into the mounting hole 122. Under the electrical drive of an external power source, the pump body 23 can transport the chemical agents in the medicine storage box 21 to the medicine injection pipe 22, and then inject them into the sewage contained in the shell 11.

[0037] Combination Figure 2 and Figure 3 As shown, in some embodiments, the stirring assembly 30 includes a rotating tube 31 inserted into the shell 11 through the mounting hole 122, a connecting tube 32 connected to the rotating tube 31, and a motor 33 for driving the rotating tube 31 to rotate around the central axis of the rotating tube 31. A first sealing bearing 34 is provided inside the end of the rotating tube 31 outside the inner cavity 110, and the inner side of the first sealing bearing 34 is connected to the outer wall of the end of the injection tube 22 inserted into the mounting hole 122. The first sealing bearing 34 can form a rotating sealed connection between the rotating tube 31 and the injection tube 22. A second sealing bearing 35 is installed on the outside of the end of the rotating tube 31 close to the cover body 12, and the outer side of the second sealing bearing 35 is connected to the inner wall of the mounting hole 122. The second sealing bearing 35 can form a rotating sealed connection between the rotating tube 31 and the cover body 12.

[0038] One end of the connecting pipe 32 away from the rotating pipe 31 is a blocking structure, and a plurality of through holes 321 are provided on the circumferential side wall of the connecting pipe 32. The chemical agent added into the rotating pipe 31 by the dosing assembly 20 through the injection pipe 22 can enter the sewage in the housing 11 through the plurality of through holes 321 on the connecting pipe 32. In this embodiment, the connecting pipe 32 extends in the radial direction of the rotating pipe 31 toward the side wall of the housing 11. In some other embodiments, the angle between the axis of the connecting pipe 32 and the axis of the rotating pipe 31 is in the range of 0° to 90°.

[0039] The motor 33 is installed on the side of the cover body 12 away from the inner cavity 110. A driving gear 331 is provided at the output end of the motor 33, and a driven gear 332 meshing with the driving gear 331 is provided on the rotating tube 31. The motor 33 rotates the driving gear 331 under the electrical drive of an external power source, and then drives the rotating tube 31 to rotate around the central axis of the rotating tube 31 through the driven gear 332. In this embodiment, since the output shaft of the motor 33 is parallel to the axis of the rotating tube 31, the driving gear 331 and the driven gear 332 can both be cylindrical gears or helical gears. In some other embodiments, according to the installation situation of the motor 33, the driving gear 331 and the driven gear 332 can also be bevel gears.

[0040] Recombination Figure 2 As shown, the dosing and mixing device provided by the utility model also includes a blowing assembly 40 arranged in the cavity of the shell 11. The blowing assembly 40 includes an air supply pipe 41 located in the rotating tube 31 and penetrating the rotating tube 31, an air pump 42 arranged at one end of the air supply pipe 41 located outside the shell 11, and an air distribution pipe 43 arranged at one end of the air supply pipe 41 located in the inner cavity 110. The air supply pipe 41 is coaxially arranged with the rotating tube 31 and one end of the injection tube 22 inserted in the mounting hole 122. The upper end of the air supply pipe 41 penetrates the end of the injection tube 22 inserted in the mounting hole 122 and is connected to the air pump 42. The outer diameter of the air supply pipe 41 is smaller than the inner diameter of the end of the injection tube 22 located in the mounting hole 122. The lower end of the air supply pipe 41 penetrates the rotating tube 31 and is connected to the air distribution pipe 43. A sealing bearing is also used between the air supply pipe 41 and the rotating tube 31 to realize a rotating sealed connection.

[0041] Both ends of the gas distribution pipe 43 are sealed, and a plurality of air nozzles 44 are provided on the wall of the gas distribution pipe 43. The air pump 42 can pump external gas into the gas delivery pipe 41 under the electrical drive of an external power source. The gas enters the gas distribution pipe 43 through the gas delivery pipe 41, and then enters the sewage inside the housing 11 through the plurality of air nozzles 44 and forms bubbles. In the process of moving toward the liquid surface, the bubbles continuously stir the sewage, so that the sewage and the medicine are quickly mixed and evenly mixed.

[0042] The working process of the dosing and mixing device for oilfield sewage treatment provided by the utility model is as follows: the oilfield sewage enters the inner cavity 110 of the housing 11 through the liquid inlet pipe 121, and the filter element 124 filters the sewage to remove suspended particles in the sewage. When the sewage is added to a predetermined amount, the addition is stopped, and the pump body 23, the air pump 42, and the motor 33 are turned on. The pump body 23 transports the chemical agent in the medicine storage box 21 to the injection pipe 22, and then enters the sewage in the housing 11 through the through hole 321 on the rotating pipe 31 and the connecting pipe 32.

[0043] At the same time, the motor 33 drives the rotating tube 31 to rotate through the driving gear 331 and the driven gear 332, thereby driving the connecting tube 32 to rotate. During the rotation of the connecting tube 32, on the one hand, the chemical agent is spread into the sewage through the through hole 321; on the other hand, the sewage is stirred horizontally to quickly mix the sewage and the chemical agent.

[0044] At the same time, the air pump 42 pumps the external gas into the air delivery pipe 41. The gas enters the gas distribution pipe 43 through the air delivery pipe 41, and then enters the sewage inside the shell 11 through a plurality of air nozzles 44 to form bubbles. In the process of moving toward the liquid surface, the bubbles continuously turn the sewage vertically, further quickly mixing the sewage and the liquid medicine, thereby improving the sewage treatment efficiency and treatment effect.

[0045] After the sewage treatment is completed, the drain valve 112 is opened to discharge the treated water out of the housing 11 through the drain pipe 111 .

[0046] The beneficial effect of the dosing and mixing device for oilfield sewage treatment provided by the utility model is that it includes a mixing box 10 configured to contain oilfield sewage, a stirring assembly 30 arranged in the mixing box 10, and a dosing assembly 20 in fluid communication with the mixing box 10 through the stirring assembly 30, and a blowing assembly 40 is also arranged in the mixing box, wherein the blowing assembly 40 penetrates the stirring assembly 30 and connects the mixing box 10 with the external gas, and the blowing assembly 40 is configured to blow gas into the mixing box 10 from the bottom of the mixing box 10. While the stirring assembly 30 stirs the oilfield sewage and chemical agents in the mixing box 10 horizontally, the gas blown by the blowing assembly 40 moves upward from the bottom of the sewage in the form of bubbles and continuously turns the oilfield sewage and chemical agents vertically, so that the sewage and the chemical agents are quickly mixed and evenly mixed, thereby improving the treatment efficiency of the oilfield sewage.

[0047] In addition, since the dosing component 20 adds chemicals into the oilfield wastewater through the stirring component 30, on the one hand, the chemicals can be quickly dispersed into the oilfield wastewater, and on the other hand, it avoids opening a new channel for adding chemicals on the mixing box.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] The above is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without departing from the scope of the utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A dosing and mixing device for oilfield wastewater treatment, characterized in that: The invention comprises a mixing box (10) configured to contain oilfield wastewater, a stirring assembly (30) disposed in the mixing box (10), and a dosing assembly (20) fluidically connected to the mixing box (10) through the stirring assembly (30). A blowing assembly (40) is also provided in the mixing box (10) to connect the mixing box (10) with external gas. The blowing assembly (40) is configured to penetrate the stirring assembly (30) and blow gas from the bottom of the mixing box (10) into the oilfield wastewater in the mixing box (10).

2. The dosing and mixing device for oilfield wastewater treatment according to claim 1, characterized in that: The mixing box (10) comprises a shell (11) defining an inner cavity (110) and a cover (12) arranged on the shell (11), wherein the cover (12) is provided with a mounting hole (122) for mounting the stirring assembly (30).

3. The dosing and mixing device for oilfield wastewater treatment according to claim 2, characterized in that: The air blowing assembly (40) comprises an air delivery pipe (41) inserted into the mixing box (10) through the mounting hole (122), an air pump (42) arranged at one end of the air delivery pipe (41) located outside the housing (11), and an air distribution pipe (43) arranged at one end of the air delivery pipe (41) located at the bottom of the housing (11). The gas distribution pipe (43) is configured to connect the inner cavity (110) with external gas through the air pump (42), the gas delivery pipe (41) and a plurality of gas nozzles (44) installed on the gas distribution pipe (43).

4. The dosing and mixing device for oilfield wastewater treatment according to claim 3 is characterized in that: Both ends of the gas distribution pipe (43) are sealed structures, and the plurality of gas nozzles (44) are installed on the pipe wall of the gas distribution pipe (43) and are configured to be able to blow gas into the oilfield sewage in the shell (11).

5. The dosing and mixing device for oilfield wastewater treatment according to any one of claims 2 to 4, characterized in that: The cover body (12) is also provided with a liquid inlet pipe (121) for injecting oilfield sewage into the housing (11), and a filter element (124) for filtering oilfield sewage is detachably installed in the liquid inlet pipe (121).

6. The dosing and mixing device for oilfield wastewater treatment according to claim 3 or 4, characterized in that: The stirring assembly (30) comprises a rotating tube (31) rotatably and sealably mounted at the mounting hole (122), a connecting tube (32) connecting the rotating tube (31) and the inner cavity (110), and a motor (33). Wherein, the motor (33) is configured to be able to drive the rotating tube (31) and the connecting tube (32) to rotate around the central axis of the rotating tube (31).

7. The dosing and mixing device for oilfield wastewater treatment according to claim 6, characterized in that: The output end of the motor (33) is provided with a driving gear (331), and the rotating tube (31) is provided with a driven gear (332), and the driving gear (331) and the driven gear (332) are meshed for transmission.

8. The dosing and mixing device for oilfield wastewater treatment according to claim 6, characterized in that: One end of the connecting tube (32) away from the rotating tube (31) is a blocking structure, and a through hole (321) for connecting the inner cavity (110) and the dosing assembly (20) is provided on the circumferential side wall of the connecting tube (32).

9. The dosing and mixing device for oilfield wastewater treatment according to claim 6, characterized in that: The drug adding assembly (20) comprises a drug storage box (21) for containing chemical agents, and a drug injection pipe (22) connecting the drug storage box (21) and the rotating pipe (31). One end of the drug injection tube (22) is connected to the drug storage box (21) through the pump body (23), and the other end of the drug injection tube (22) is coaxially arranged with the rotating tube (31) and the air delivery tube (41), and is rotatably sealed and connected to the rotating tube (31).

10. The dosing and mixing device for oilfield wastewater treatment according to claim 9, characterized in that: The rotating tube (31) is provided with a first sealing bearing (34) and a second sealing bearing (35) on both sides thereof. The first sealing bearing (34) is configured to form a rotational sealing connection between the rotating tube (31) and the injection tube (22), and the second sealing bearing (35) is configured to form a rotational sealing connection between the rotating tube (31) and the cover body (12).

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