Oil removal device for oil-containing wastewater treatment of oil and gas field

Abstract

The utility model relates to the technical field of oil-containing wastewater treatment, and discloses an oil-removing device for oil-containing wastewater treatment of an oil and gas field, which comprises a tank body, and a cleaning mechanism and an oil filtering mechanism are arranged in the tank body; the cleaning mechanism comprises a tank cover, a connecting frame and a feeding pipe are fixedly connected to the top of the tank cover, an electric push rod is fixedly connected to the interior of the connecting frame, a scraping plate is fixedly connected to the output end of the electric push rod, a feeding frame is fixedly connected to the top of the feeding pipe, and a filter screen is fixedly connected to the inner wall of the feeding frame. The oil filtering mechanism comprises a supporting ring, and an oil-water separation filter element is arranged at the top of the supporting ring; a discharge pipe is fixedly connected to the bottom of the tank body, and a first switch valve is mounted in the discharge pipe. According to the oil-removing device for oil-containing wastewater treatment of the oil and gas field, residual oil stains and impurities on the inner wall of the tank body are automatically cleaned, the labor intensity of operators is reduced, the cleaning effect is guaranteed, and secondary pollution is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oily wastewater treatment, in particular to an oil and gas field oily wastewater treatment and oil removal device. Background Art

[0002] As oil and gas field production enters its mid- to late-stage stages, downhole pressure decreases. Water injection and chemical flooding methods are used to increase pressure and facilitate further production. During oil and gas field production, the produced fluid primarily consists of water, oil, and gas phases. During subsequent oil-water phase separation processes, the presence of numerous chemicals and dynamic equipment in the production process can lead to the presence of numerous emulsified oil droplets in the water phase, resulting in excessively high oil content in the produced water. This necessitates the use of specialized oil removal equipment for filtration.

[0003] Chinese Patent Publication No. CN216125418U discloses an "oil removal device for treating oily wastewater from oil and gas fields," comprising a tank; an odor removal mechanism located in the upper portion of the tank to filter odors from the wastewater; and an oil filter located in the middle of the tank. This application describes an apparatus for adsorbing and filtering odorous gases from oily wastewater.

[0004] However, when the above-mentioned device treats oily wastewater, the oil and impurities in the wastewater easily form a stubborn adhesion layer on the inner wall of the tank, which not only affects the treatment effect of the equipment, but also increases the difficulty of cleaning and maintenance. Traditional cleaning methods mostly rely on manual operation, which is not only labor-intensive, but also difficult to ensure the cleaning effect, and may even cause secondary pollution to the equipment. Utility Model Content

[0005] In response to the above-mentioned technical deficiencies, the purpose of the utility model is to provide an oil and gas field oily wastewater treatment and oil removal device, which can automatically clean the oil and impurities remaining on the inner wall of the tank, reduce the labor intensity of the operator, ensure the cleaning effect, and avoid secondary pollution.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] An oil and gas field oily wastewater treatment and oil removal device comprises a tank body, wherein a cleaning mechanism and an oil filtering mechanism are arranged inside the tank body;

[0008] The cleaning mechanism includes a tank cover, the top of the tank cover is fixedly connected to a connecting frame and a feed pipe, an electric push rod is fixedly connected inside the connecting frame, an output end of the electric push rod is fixedly connected to a scraper, the top of the feed pipe is fixedly connected to the feed frame, and the inner wall of the feed frame is fixedly connected to a filter screen;

[0009] The oil filtering mechanism comprises a support ring, and an oil-water separation filter element is arranged on the top of the support ring.

[0010] Specifically, through the above technical solution,

[0011] Preferably, a discharge pipe is fixedly connected to the bottom of the tank body, and a first switch valve is installed inside the discharge pipe. An oil drain pipe is fixedly connected to the outside of the tank body, and a second switch valve is installed inside the oil drain pipe.

[0012] Preferably, a supporting leg is fixedly connected to the bottom of the tank body, and a plurality of the supporting legs are provided and evenly distributed on the bottom of the tank body, and anti-slip grooves are provided on the bottoms of the plurality of supporting legs.

[0013] Preferably, the outer side of the scraper is in contact with the tank cover and the inner wall of the tank body, and a plurality of through holes are provided on the surface of the scraper.

[0014] Preferably, a plurality of mounting holes are provided on the outer side of the top of the tank body and the outer side of the bottom of the tank cover. Bolts are threadedly connected inside the mounting holes, and the tank cover is fixed to the top of the tank body by the bolts.

[0015] Preferably, the support ring is fixedly connected to the bottom wall of the tank body.

[0016] Preferably, the oil-water separation filter element is movably connected to the inside of the tank body, and the bottom of the oil-water separation filter element is overlapped with the top of the support ring.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] First, the oily wastewater is introduced into the tank through the feed pipe. The wastewater is initially filtered through the filter in the feed frame to remove larger impurities and particulate matter. As the wastewater is continuously introduced, the oil and impurities in the tank will gradually adhere to the inner wall of the tank. At this time, the electric push rod is started to drive the scraper to slide along the inner wall of the tank. The outer side of the scraper fits tightly with the inner wall of the tank, effectively scraping off the oil and impurities attached to the inner wall of the tank. The through holes on the surface of the scraper reduce the resistance during the cleaning process, improve the cleaning efficiency, and facilitate the wastewater to flow into the tank from the through holes. The wastewater that has been preliminarily treated by the cleaning mechanism enters the oil filter mechanism. The oil-water separation filter element removes the oil in the wastewater through its special filter medium. The oil is separated, and the bottom of the oil-water separation filter element is overlapped with the top of the support ring to ensure the stability and filtering effect of the oil-water separation filter element. Under the action of centrifugal force, the oil is separated and accumulated above the oil-water separation filter element. As the oil is continuously separated, the treated clean water gradually accumulates at the bottom of the tank. At this time, open the first switch valve on the discharge pipe to discharge the treated clean water out of the tank for subsequent use or discharge, and the separated oil is discharged through the oil drain pipe. The discharge process can be controlled and adjusted by the second switch valve, which realizes automatic cleaning of residual oil and impurities on the inner wall of the tank, reduces the labor intensity of operators, ensures the cleaning effect, and avoids secondary pollution.

[0019] Second, the tank body and the tank cover are connected by bolts, which makes it easy to maintain and clean the inside of the tank body. In addition, the movable connection method of the oil-water separation filter element also facilitates the replacement and maintenance of the oil-water separation filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the oil filter structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0025] Among them: 1. Tank body; 101. Discharge pipe; 102. First switch valve; 103. Oil drain pipe; 104. Second switch valve; 105. Support leg; 2. Cleaning mechanism; 201. Tank cover; 202. Connecting frame; 203. Feed pipe; 204. Electric push rod; 205. Scraper; 206. Feed frame; 207. Filter; 208. Bolt; 3. Oil filter mechanism; 301. Support ring; 302. Oil-water separation filter element. DETAILED DESCRIPTION

[0026] The specific implementation of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] An oil and gas field oily wastewater treatment and oil removal device, please refer to Figure 1-5 , comprising a tank body 1, wherein a cleaning mechanism 2 and an oil filtering mechanism 3 are provided inside the tank body 1;

[0028] The cleaning mechanism 2 includes a tank cover 201, a connecting frame 202 and a feed pipe 203 are fixedly connected to the top of the tank cover 201, an electric push rod 204 is fixedly connected to the inside of the connecting frame 202, a scraper 205 is fixedly connected to the output end of the electric push rod 204, a feed frame 206 is fixedly connected to the top of the feed pipe 203, and a filter screen 207 is fixedly connected to the inner wall of the feed frame 206;

[0029] The oil filtering mechanism 3 comprises a support ring 301 , and an oil-water separation filter element 302 is provided on the top of the support ring 301 .

[0030] Through the above technical solution, first, the oily wastewater is introduced into the tank body 1 through the feed pipe 203, and the wastewater is preliminarily filtered through the filter screen 207 in the feed frame 206 to remove larger impurities and particulate matter. As the wastewater is continuously introduced, the oil and impurities in the tank body 1 will gradually adhere to the inner wall of the tank body 1. At this time, the electric push rod 204 is started to drive the scraper 205 to slide along the inner wall of the tank body 1. The outer side of the scraper 205 is tightly fitted with the inner wall of the tank body 1, effectively scraping off the oil and impurities attached to the inner wall of the tank body 1. The through holes on the surface of the scraper 205 reduce the resistance during the cleaning process, improve the cleaning efficiency, and also facilitate the wastewater to flow into the interior of the tank body 1 from the through holes. The wastewater preliminarily treated by the cleaning mechanism 2 enters the oil filter mechanism 3, and the oil-water separation filter element 302 passes through its special filtering medium The oil in the wastewater is separated by the quality, and the bottom of the oil-water separation filter element 302 is overlapped with the top of the support ring 301 to ensure the stability and filtering effect of the oil-water separation filter element 302. Under the action of centrifugal force, the oil is separated and accumulated above the oil-water separation filter element 302. As the oil is continuously separated, the treated clean water gradually accumulates at the bottom of the tank body 1. At this time, the first switch valve 102 on the discharge pipe 101 is opened to discharge the treated clean water out of the tank body 1 for subsequent use or discharge, and the separated oil is discharged through the oil drain pipe 103. The discharge process can be controlled and adjusted by the second switch valve 104, thereby realizing automatic cleaning of the oil and impurities remaining on the inner wall of the tank body 1, reducing the labor intensity of the operator, ensuring the cleaning effect, and avoiding secondary pollution.

[0031] Specifically, a discharge pipe 101 is fixedly connected to the bottom of the tank body 1 , a first switch valve 102 is installed inside the discharge pipe 101 , an oil discharge pipe 103 is fixedly connected to the outside of the tank body 1 , a second switch valve 104 is installed inside the oil discharge pipe 103 .

[0032] Through the above technical solution, a discharge pipe 101 is fixedly connected to the bottom of the tank body 1, and a first switch valve 102 is installed inside the discharge pipe 101, allowing the user to control the discharge of treated wastewater as needed. When the wastewater is treated by the cleaning mechanism 2 and the oil filtering mechanism 3 and meets the discharge standard, the wastewater can be discharged from the discharge pipe 101 by opening the first switch valve 102, and the separated oil can be discharged through the oil discharge pipe 103 by opening the second switch valve 104.

[0033] Specifically, a support leg 105 is fixedly connected to the bottom of the tank body 1 . A plurality of support legs 105 are provided and are evenly distributed on the bottom of the tank body 1 . Anti-slip grooves are provided on the bottoms of the plurality of support legs 105 .

[0034] Through the above technical solution, the support legs 105 provide stable support for the tank body 1 to prevent it from moving or tilting during operation. Multiple support legs 105 are evenly distributed at the bottom of the tank body 1, increasing the overall stability. In addition, the anti-slip grooves at the bottom of the support legs 105 can increase the friction with the ground, further preventing the device from sliding during operation, thereby ensuring the safety and stability of the device.

[0035] Specifically, the outer side of the scraper 205 is in contact with the tank cover 201 and the inner wall of the tank body 1 , and a plurality of through holes are formed on the surface of the scraper 205 .

[0036] Through the above technical solution, the outer side of the scraper 205 fits tightly against the tank cover 201 and the inner wall of the tank body 1, ensuring that the oil and impurities attached to the tank cover 201 and the inner wall of the tank body 1 can be effectively scraped off during the cleaning process. The multiple through holes opened on the surface of the scraper 205 help to reduce the resistance during the cleaning process and improve the cleaning efficiency. The multiple through holes also facilitate the wastewater to flow into the interior of the tank body 1 from the through holes.

[0037] Specifically, a plurality of mounting holes are provided on the outer side of the top of the tank body 1 and the outer side of the bottom of the tank cover 201 . Bolts 208 are threadedly connected inside the mounting holes, and the tank cover 201 is fixed to the top of the tank body 1 through the bolts 208 .

[0038] Through the above technical solution, multiple mounting holes are opened on the outer side of the top of the tank body 1 and the outer side of the bottom of the tank cover 201, and the tank cover 1 is fixed to the top of the tank body 201 by bolts 208. This bolt connection method makes the connection between the tank cover 1 and the tank body 201 more firm and reliable, ensuring the sealing of the device during operation. At the same time, the detachable nature of the bolt connection also makes it easier for users to maintain and repair the device.

[0039] Specifically, the support ring 301 is fixedly connected to the inner bottom wall of the tank body 1 .

[0040] Through the above technical solution, the support ring 301 is fixedly connected to the inner bottom wall of the tank body 1, providing a stable support for the oil-water separation filter element 302.

[0041] Specifically, the oil-water separation filter element 302 is movably connected to the inside of the tank body 1 , and the bottom of the oil-water separation filter element 302 overlaps with the top of the support ring 301 .

[0042] Through the above technical solution, the oil-water separation filter element 302 is movably connected to the inside of the tank body 1, and its bottom overlaps with the top of the support ring 301, so that the oil-water separation filter element 302 can be easily installed and replaced. At the same time, it also ensures the stability of the oil-water separation filter element 302 during operation. The oil-water separation filter element 302 separates the oil in the wastewater through its special filtering medium, thereby achieving the purpose of oil-water separation.

[0043] During use, first, the oily wastewater is introduced into the tank body 1 through the feed pipe 203, and the wastewater is preliminarily filtered through the filter screen 207 in the feed frame 206 to remove larger impurities and particulate matter. As the wastewater is continuously introduced, the oil and impurities in the tank body 1 will gradually adhere to the inner wall of the tank body 1. At this time, the electric push rod 204 is started to drive the scraper 205 to slide along the inner wall of the tank body 1. The outer side of the scraper 205 is tightly fitted with the inner wall of the tank body 1, effectively scraping off the oil and impurities attached to the inner wall of the tank body 1. The through holes on the surface of the scraper 205 reduce the resistance during the cleaning process, improve the cleaning efficiency, and also facilitate the wastewater to flow into the interior of the tank body 1 from the through holes. The wastewater preliminarily treated by the cleaning mechanism 2 enters the oil filter The oil-water separation filter element 302 separates the oil in the wastewater through its special filtering medium. The bottom of the oil-water separation filter element 302 overlaps with the top of the support ring 301 to ensure the stability and filtering effect of the oil-water separation filter element 302. Under the action of centrifugal force, the oil is separated and accumulated above the oil-water separation filter element 302. As the oil is continuously separated, the treated clean water gradually accumulates at the bottom of the tank body 1. At this time, the first switch valve 102 on the discharge pipe 101 is opened to discharge the treated clean water out of the tank body 1 for subsequent use or discharge. The separated oil is discharged through the oil discharge pipe 103. The discharge process can be controlled and adjusted by the second switch valve 104.

[0044] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil and gas field oily wastewater treatment and oil removal device, comprising a tank body (1), characterized in that: A cleaning mechanism (2) and an oil filtering mechanism (3) are provided inside the tank body (1); The cleaning mechanism (2) comprises a tank cover (201), the top of the tank cover (201) is fixedly connected to a connecting frame (202) and a feeding pipe (203), the interior of the connecting frame (202) is fixedly connected to an electric push rod (204), the output end of the electric push rod (204) is fixedly connected to a scraper (205), the top of the feeding pipe (203) is fixedly connected to a feeding frame (206), and the inner wall of the feeding frame (206) is fixedly connected to a filter screen (207); The oil filtering mechanism (3) comprises a support ring (301), and an oil-water separation filter element (302) is provided on the top of the support ring (301).

2. The oil and gas field oily wastewater treatment and oil removal device according to claim 1, characterized in that: The bottom of the tank body (1) is fixedly connected to a discharge pipe (101), a first switch valve (102) is installed inside the discharge pipe (101), and the outside of the tank body (1) is fixedly connected to an oil discharge pipe (103), a second switch valve (104) is installed inside the oil discharge pipe (103).

3. The oil and gas field oily wastewater treatment and oil removal device according to claim 1, characterized in that: The bottom of the tank body (1) is fixedly connected with a support leg (105), and a plurality of the support legs (105) are provided and evenly distributed on the bottom of the tank body (1), and anti-slip grooves are provided on the bottoms of the plurality of support legs (105).

4. The oil and gas field oily wastewater treatment and oil removal device according to claim 1, characterized in that: The outer side of the scraper (205) is in contact with the tank cover (201) and the inner wall of the tank body (1), and a plurality of through holes are formed on the surface of the scraper (205).

5. The oil and gas field oily wastewater treatment and oil removal device according to claim 1, characterized in that: A plurality of mounting holes are provided on the outer side of the top of the tank body (1) and the outer side of the bottom of the tank cover (201). Bolts (208) are threadedly connected inside the mounting holes, and the tank cover (201) is fixed to the top of the tank body (1) by the bolts (208).

6. The oil and gas field oily wastewater treatment and oil removal device according to claim 1, characterized in that: The support ring (301) is fixedly connected to the inner bottom wall of the tank body (1).

7. The oil and gas field oily wastewater treatment and oil removal device according to claim 1, characterized in that: The oil-water separation filter element (302) is movably connected inside the tank body (1), and the bottom of the oil-water separation filter element (302) is overlapped with the top of the support ring (301).

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