A semi-buried oil-water sludge separation device

Abstract

This application relates to a semi-buried oil-water-sludge separation device, belonging to the field of industrial waste oil and water treatment devices. It includes an oil-water-sludge separation component, with a pre-sedimentation tank at the inlet end of the component. The separation component also includes a sedimentation component connected to the pre-sedimentation tank. A waste oil collection tank is located on one side of the sedimentation component, and an oil collection component is connected between the waste oil collection tank and the sedimentation component. The waste oil collection tank is connected to the bottom of the pre-sedimentation tank, and a sludge discharge component is located on the side wall of the waste oil collection tank. This application provides on-site treatment of waste oil and water from coalbed methane surface drainage equipment, solving the problem of waste oil and water treatment at coalbed methane drainage sites.

Description

Technical Field

[0001] This application relates to the field of industrial waste oil and water treatment devices, and in particular to a semi-buried oil-water-sludge separation device. Background Technology

[0002] In the field of coalbed methane extraction, with the initial construction and application of rodless lifting technologies such as hydraulic tubular pumps, a series of new problems have arisen. In this process, during the operation of the high-pressure three-plunger pump in the rodless pumping equipment, a small amount of water needs to seep out from the sealing surface between the plunger and the packing as a cooling and lubricating fluid to ensure the normal working condition of the plunger and packing. Furthermore, during high-pressure operation, the operation of the reversing water valve, the pump head rubber ring seal, and the operation of the low-pressure water inlet pipe of the plunger pump, punctures and water leakage may occur. At the same time, the crankcase of the high-pressure three-plunger pump requires regular oil replenishment, and the frequent movement of the connecting rod often damages the oil seal, causing oil leakage. In addition, hydraulic oil from the hydraulic station and hydraulic oil pipes leaks into the oil collection tank during maintenance or malfunctions. These factors collectively lead to the generation of waste oil-water.

[0003] The waste oil-water produced by coalbed methane hydraulic tubular pumps has distinct characteristics: the amount of oil is relatively small, mostly existing in the form of an oil film, while the amount of water is relatively large, with a daily output of 0.15-0.25 m³. 3 Meanwhile, because hydraulic tubular pumps do not have a base and are usually placed flat on the ground, this special equipment form brings additional challenges to the treatment of waste oil and water, making traditional oil-water separators unable to be effectively adapted.

[0004] In terms of equipment adaptability, traditional oil-water separators are mostly designed for equipment with a base or specific installation conditions. They are extremely inconvenient for collecting and treating waste oil and water generated by hydraulic tubular pumps that are laid flat on the ground. They cannot effectively guide waste oil and water into the separation device, and may even cause problems such as waste oil and water leakage, which further affect the separation process and environmental safety.

[0005] From a treatment perspective, current methods have many shortcomings. Transporting waste oil and water to specific wastewater treatment sites is costly and inefficient in complex terrains such as mountainous areas. Furthermore, weather changes and road conditions can severely impact delivery timeliness, and even slight delays can lead to environmental pollution. Manual oil retrieval is not only labor-intensive and inefficient, but also struggles to effectively remove oil films, resulting in pollution if not treated promptly. While adding chemical reagents for oil-water separation can improve efficiency in some cases, these chemicals are expensive and can easily remain in wastewater, causing secondary pollution.

[0006] Regarding the aforementioned technologies, the inventors believe that existing oil-water separation technologies are insufficient for achieving efficient on-site separation of waste oil and water generated by coalbed methane hydraulic tubular pumps, including the effective separation of waste oil, sludge, and water, as well as the proper collection of sludge and waste oil and the compliant discharge of clean water. Summary of the Invention

[0007] In order to address the problem of waste oil and water treatment at coalbed methane surface drainage equipment and solve the problem of waste oil and water treatment at coalbed methane drainage sites, this application provides a semi-buried oil-water-sludge separation device.

[0008] This application provides a semi-buried oil-water-sludge separation device, which adopts the following technical solution:

[0009] A semi-buried oil-water-sludge separation device includes an oil-water-sludge separation component. A pre-sedimentation tank is provided at the inlet end of the oil-water-sludge separation component. The oil-water-sludge separation component includes a sedimentation component, which is connected to the pre-sedimentation tank. A waste oil collection tank is also provided on one side of the sedimentation component. An oil collection component is provided between the waste oil collection tank and the sedimentation component. The waste oil collection tank is connected to the bottom end of the pre-sedimentation tank. A sludge discharge component is provided on the side wall of the waste oil collection tank.

[0010] Optionally, the pre-sedimentation tank includes a sedimentation tank body, a waste oil and water inlet fixedly connected to the sedimentation tank body, a waste oil and water outlet fixedly connected to the sedimentation tank body, the end of the waste oil and water outlet away from the sedimentation tank body being connected to the oil-water sludge separation component, a sludge discharge pipe fixedly connected to the bottom end of the sedimentation tank body, a gate installed on the sludge discharge pipe, and the sludge discharge pipe being connected to the waste oil collection tank.

[0011] Optionally, a baffle is fixedly connected inside the main body of the sedimentation tank. The baffle is located between the waste oil and water inlet and the waste oil and water outlet. The bottom end of the baffle is spaced from the bottom wall of the main body of the sedimentation tank to form a sedimentation channel. The sedimentation channel is connected to the sludge discharge pipe. The baffle divides the main body of the sedimentation tank into a pre-filtration section near the waste oil and water inlet and a post-filtration section near the waste oil and water outlet. The pre-filtration section and the post-filtration section are connected through the sedimentation channel.

[0012] Optionally, the bottom of the sedimentation tank body is a conical structure, and the sludge discharge pipe is located at the lowest end of the sedimentation tank body.

[0013] Optionally, the sedimentation assembly includes a sedimentation tank, which is connected to the outlet end of the pre-sedimentation tank. A clear water discharge pipe is provided on the sedimentation tank. A first submersion pipe is fixedly connected to one end of the clear water discharge pipe inside the sedimentation tank. The first submersion pipe is connected to the clear water discharge pipe, and the inlet end of the first submersion pipe is located at the lower part of the oil in the sedimentation tank.

[0014] Optionally, the sedimentation tank includes a first sedimentation section and a second sedimentation section. The first sedimentation section is connected to the outlet end of the pre-sedimentation tank, and the second sedimentation section is connected to the clear water discharge pipe. A second submersion pipe is provided between the first sedimentation section and the second sedimentation section, and the inlet end of the second submersion pipe is located at the lower part of the oil in the first sedimentation section.

[0015] Optionally, the oil collection assembly includes an oil collection pipe with an oil collection hole at the top end and the outlet end of the oil collection pipe connected to the waste oil collection pool.

[0016] Optionally, the oil collecting pipe includes a first oil collecting branch pipe opposite to the first sedimentation section, the top end of the first oil collecting branch pipe having a first oil collecting hole, and a second oil collecting branch pipe provided on the second sedimentation section, the top end of the second oil collecting branch pipe having a second oil collecting hole.

[0017] Optionally, a first waste oil collection valve is fixedly connected to the first oil collection branch pipe, and the first waste oil collection valve controls the connection of the first oil collection branch pipe. A second waste oil collection valve is fixedly connected to the second oil collection branch pipe, and the second waste oil collection valve controls the connection of the second oil collection branch pipe.

[0018] Optionally, the sludge discharge assembly includes a sludge discharge pipe, a sludge discharge valve is fixedly connected to the sludge discharge pipe, and the connection end of the sludge discharge pipe to the waste oil collection tank is located at the bottom end of the side wall of the waste oil collection tank.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. High-efficiency separation: The conical pre-sedimentation tank utilizes the principle of gravity sedimentation and separation to achieve highly efficient separation of waste oil and water. Oil, water, and sludge are rapidly and effectively separated within the pre-sedimentation tank, significantly improving separation efficiency.

[0021] 2. Collection Method: The bottom of the pre-sedimentation tank is connected to the sludge discharge valve of the waste oil collection tank, forming a unique sludge collection structure and method. This design facilitates sludge collection and improves collection efficiency.

[0022] 3. Environmental advantages: The semi-buried installation design allows waste oil and water to flow naturally into the oil-water-sludge separation unit, reducing environmental pollution. The separated clean water can be directly discharged, meeting environmental protection requirements.

[0023] 4. Stability: The two-stage sedimentation structure design of the main separator enhances the separation effect and improves the stability and operational reliability of the equipment.

[0024] 5. Reduce risks: The inlet of the submerged pipe is located in the lower part of the silt sediment layer and the floating oil layer, which reduces the probability of sediment and floating oil entering the subsequent stages and reduces the risk of equipment operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a semi-buried oil-water-sludge separation device according to an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the pre-sedimentation tank of a semi-buried oil-water sludge separation device according to an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the structure of the oil-water sludge separation component of a semi-buried oil-water sludge separation device according to an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Oil-water-sludge separation component; 11. Sedimentation component; 111. Sedimentation tank; 1111. First sedimentation section; 1112. Second sedimentation section; 112. Second submerged pipe; 113. Clear water discharge pipe; 1131. First submerged pipe; 12. Waste oil collection tank; 121. Oil collection pipe; 1211. First oil collection branch pipe; 1212. First oil collection hole; 1213. Second oil collection branch pipe; 1214. Second oil collection hole; 2. Pre-sedimentation tank; 21. Sedimentation tank body; 22. Waste oil and water inlet; 23. Waste oil and water outlet; 24. Baffle; 25. Sedimentation channel; 26. Pre-filtration section; 27. Post-filtration section; 28. Sludge discharge pipe. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0031] The following is in conjunction with the appendix Figure 1-3This application will be described in further detail.

[0032] This application discloses a semi-buried oil-water-sludge separation device. (Refer to...) Figure 1 , Figure 2 A semi-buried oil-water-sludge separation device includes an oil-water-sludge separation component 1. The component has an inlet on one side and an outlet on the other. Waste oil and water from external coalbed methane surface drainage equipment enters the component through the inlet for treatment, and the treated medium is discharged through the outlet. A pre-sedimentation tank 2 is located at the inlet of the component to pre-treat the waste oil and water from the coalbed methane surface drainage equipment. The oil-water-sludge separation component 1 includes a sedimentation component 11, which separates the oil and water within the waste oil and water from the coalbed methane surface drainage equipment. Because the density of the oil layer is lower than that of water, the oil floats on top of the water. The sedimentation component collects the oil in the upper layer, thus separating the oil. A waste oil collection tank 12 is also provided on one side of the sedimentation component 11. An oil collection component is provided between the waste oil collection tank 12 and the sedimentation component 11. The oil collection component collects the oil inside the sedimentation component 11 and puts it into the waste oil collection tank 12 for centralized treatment. The pre-sedimentation tank 2 is in relative communication with the waste oil collection tank 12, and the impurities settled inside the pre-sedimentation tank 2 are collected into the waste oil collection tank 12.

[0033] The oil-water-sludge separation component 1 is semi-buried, with the housing buried 65cm to 70cm underground. This solves the technical problem of low waste oil and water levels caused by the lack of a base, and addresses the issue of the conventional oil-water separator's inlet. The remaining 10cm to 15cm above ground prevents rainwater from entering the component. The semi-buried installation also improves insulation in winter and facilitates operation. The fact that most of the component is buried underground keeps the site clean and easy to manage.

[0034] The pre-sedimentation tank 2 includes a sedimentation tank body 21. One end of the sedimentation tank body 21 is fixedly connected to a waste oil-water inlet 22, and the sedimentation tank body 21 also has a waste oil-water outlet 23 on the side near the sedimentation component 11. The waste oil-water inlet 22 is used to allow waste oil and water from external coalbed methane surface drainage equipment to flow into the pre-sedimentation tank 2 for pre-treatment, and the waste oil-water outlet 23 is used to transfer the pre-treated medium inside the sedimentation tank body 21 into the sedimentation component 11 for further treatment. The height of the waste oil-water inlet 22 is the same as the height of the waste oil-water outlet 23.

[0035] The flow direction of the medium inside the sedimentation tank body 21 extends from one side of the waste oil-water inlet 22 to the side near the waste oil-water outlet 23. A baffle 24 is fixedly connected inside the sedimentation tank body 21, and the baffle 24 is gradually inclined downwards towards the side near the waste oil-water outlet 23. The top of the baffle 24 is higher than the height of the waste oil-water inlet 22, and the bottom of the baffle 24 is spaced from the bottom wall of the sedimentation tank body 21, forming a sedimentation channel 25 between the bottom wall of the baffle 24 and the bottom of the sedimentation tank body 21.

[0036] The pre-sedimentation tank 2 is divided into a pre-filtration section 26 near the waste oil and water inlet 22 and a post-filtration section 27 near the waste oil and water outlet 23 by a baffle 24. The pre-filtration section 26 and the post-filtration section 27 are connected to each other by a sedimentation channel 25 located at the bottom of the sedimentation tank.

[0037] The lower part of the sedimentation tank body 21 has a conical structure, and the diameter of the sedimentation tank body 21 gradually decreases along the height direction from top to bottom. A sludge discharge pipe 28 is fixedly connected to the bottom end of the sedimentation tank body 21. One end of the sludge discharge pipe 28 is connected to and communicates with the sedimentation tank body 21, and the other end is fixedly connected to and communicates with the side wall of the waste oil collection tank 12. The sludge discharge pipe 28 transports the sludge settled inside the sedimentation tank body 21 to the interior of the waste oil collection tank 12 for centralized treatment. A gate is fixedly connected to the sludge discharge pipe 28 to control its connectivity.

[0038] Waste oil and water flow into the sedimentation tank body 21 through the waste oil and water inlet 22. Due to the low density of oil, it quickly separates and floats to the top. At the same time, water and sludge flow down the baffle 24 to the middle and lower parts, where the sludge is initially settled. Afterward, the remaining sludge and water pass through the bottom of the baffle 24 and rise along the other side of the baffle 24. During this process, some sludge further settles, and only a small amount of water and water rises to the upper part of the sedimentation tank body 21, entering the sedimentation component 11 along with the waste oil for secondary separation.

[0039] Reference Figure 1 , Figure 3 The sedimentation assembly 11 includes a sedimentation tank 111, which includes a first sedimentation section 1111 and a second sedimentation section 1112 disposed opposite to each other. The first sedimentation section 1111 and the second sedimentation section 1112 are relatively isolated from each other. The first sedimentation section 1111 is located on the side closer to the pre-sedimentation tank 2, and the second sedimentation section 1112 is located on the side away from the pre-sedimentation tank 2. The first sedimentation section 1111 is connected to the sedimentation tank body 21 through a waste oil-water outlet 23.

[0040] A second submersion pipe 112 is provided between the first sedimentation section 1111 and the second sedimentation section 1112. The inlet end of the second submersion pipe 112 is located inside the first sedimentation section 1111, and the inlet of the second submersion pipe 112 is located below the oil inside the first sedimentation section 1111. The outlet of the second submersion pipe 112 is located inside the second sedimentation section 1112, thereby connecting the water after sedimentation and stratification in the first sedimentation section 1111 to the interior of the second sedimentation section 1112 through the second submersion pipe 112.

[0041] A clear water discharge pipe 113 is fixedly connected to the side of the second sedimentation section 1112 away from the first sedimentation section 1111. The end of the clear water discharge pipe 113 located inside the second sedimentation section 1112 is fixedly connected to a first submersion pipe 1131. The bottom inlet of the first submersion pipe 1131 is located below the oil in the second sedimentation section 1112, thereby connecting the water after sedimentation and stratification in the second sedimentation section 1112 to the clear water discharge pipe 113 for discharge.

[0042] A regulating valve is fixedly connected to the clean water discharge pipe 113. The regulating valve is used to control the connection of the clean water discharge pipe 113.

[0043] Waste oil collection tank 12 is located on one side of sedimentation tank 111, and an oil collection pipe 121 is provided between waste oil collection tank 12 and sedimentation tank 111. The oil collection pipe 121 includes a first oil collection branch pipe 1211 opposite to the first sedimentation section 1111 and a second oil collection branch pipe 1213 opposite to the second sedimentation section 1112.

[0044] The inlet end of the first oil collecting pipe 1211 is located inside the first sedimentation section 1111, and the top end of the first oil collecting pipe 1211 is provided with a first oil collecting hole 1212. The first oil collecting hole 1212 connects the interior of the first sedimentation section 1111 with the interior of the first oil collecting pipe 1211, and the inlet end of the first oil collecting pipe 1211 is located at the oil layer position of the first sedimentation section 1111. Thus, the oil that has settled inside the first sedimentation section 1111 is moved through the first oil collecting hole 1212 to the waste oil collection tank 12 for centralized collection. A first waste oil collection valve is fixedly connected to the first oil collecting pipe 1211, and the first waste oil collection valve is used to control the connection of the first oil collecting pipe 1211.

[0045] The inlet end of the second submerged pipe 112 is located inside the second sedimentation section 1112, and the top end of the second oil collecting pipe 1213 is provided with a second oil collecting hole 1214. The second oil collecting hole 1214 connects the interior of the second sedimentation section 1112 with the interior of the second oil collecting pipe 1213, and the inlet end of the second oil collecting pipe 1213 is located at the oil layer position of the second sedimentation section 1112. Thus, the oil that has settled inside the second sedimentation section 1112 is moved through the second oil collecting hole 1214 to the waste oil collection tank 12 for centralized collection. A second waste oil collection valve is fixedly connected to the second oil collecting pipe 1213, and the second waste oil collection valve is used to control the connection of the second oil collecting pipe 1213.

[0046] A sludge discharge pipe is fixedly connected to the bottom of the side wall of the waste oil collection tank 12. The sludge discharge pipe is in relative communication with the interior of the waste oil collection tank 12, and a sludge discharge valve is fixedly connected to the side wall of the sludge discharge pipe. The sludge discharge valve is used to control the connection of the sludge discharge pipe.

[0047] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installed," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A semi-buried oil-water-sludge separation device, characterized in that: The system includes an oil-water sludge separation component (1), with a pre-sedimentation tank (2) at the inlet end of the oil-water sludge separation component (1). The oil-water sludge separation component (1) includes a sedimentation component (11), which is connected to the pre-sedimentation tank (2). A waste oil collection tank (12) is also provided on one side of the sedimentation component (11). An oil collection component is connected between the waste oil collection tank (12) and the sedimentation component (11). The waste oil collection tank (12) is connected to the bottom end of the pre-sedimentation tank (2). A sludge discharge component is provided on the side wall of the waste oil collection tank (12).

2. The semi-buried oil-water-sludge separation device according to claim 1, characterized in that: The pre-sedimentation tank (2) includes a sedimentation tank body (21), a waste oil and water inlet (22) is fixedly connected to the sedimentation tank body (21), a waste oil and water outlet (23) is fixedly connected to the sedimentation tank body (21), the end of the waste oil and water outlet (23) away from the sedimentation tank body (21) is connected to the oil-water sludge separation component (1), a sludge discharge pipe (28) is fixedly connected to the bottom end of the sedimentation tank body (21), a gate is provided on the sludge discharge pipe (28), and the sludge discharge pipe (28) is connected to the waste oil collection tank (12).

3. The semi-buried oil-water-sludge separation device according to claim 2, characterized in that: A baffle (24) is fixedly connected inside the sedimentation tank body (21). The baffle (24) is located between the waste oil and water inlet (22) and the waste oil and water outlet (23). The bottom end of the baffle (24) is spaced from the bottom wall of the sedimentation tank body (21) to form a sedimentation channel (25). The sedimentation channel (25) is connected to the sludge discharge pipe (28). The baffle (24) divides the sedimentation tank body (21) into a pre-filtration section (26) near the waste oil and water inlet (22) and a post-filtration section (27) near the waste oil and water outlet (23). The pre-filtration section (26) and the post-filtration section (27) are connected through the sedimentation channel (25).

4. The semi-buried oil-water-sludge separation device according to claim 2, characterized in that: The bottom of the sedimentation tank body (21) is a conical structure, and the sludge discharge pipe (28) is located at the lowest end of the sedimentation tank body (21).

5. The semi-buried oil-water-sludge separation device according to claim 1, characterized in that: The sedimentation assembly (11) includes a sedimentation tank (111), which is connected to the outlet end of the pre-sedimentation tank (2). A clear water discharge pipe (113) is provided on the sedimentation tank (111). One end of the clear water discharge pipe (113) located inside the sedimentation tank (111) is fixedly connected to a first submersion pipe (1131). The first submersion pipe (1131) is connected to the clear water discharge pipe (113), and the inlet end of the first submersion pipe (1131) is located at the lower part of the oil in the sedimentation tank (111).

6. The semi-buried oil-water-sludge separation device according to claim 5, characterized in that: The sedimentation tank (111) includes a first sedimentation section (1111) and a second sedimentation section (1112). The first sedimentation section (1111) is connected to the outlet end of the pre-sedimentation tank (2), and the second sedimentation section (1112) is connected to the clear water discharge pipe (113). A second submersion pipe (112) is provided between the first sedimentation section (1111) and the second sedimentation section (1112). The inlet end of the second submersion pipe (112) is located at the lower part of the oil in the first sedimentation section (1111).

7. The semi-buried oil-water-sludge separation device according to claim 6, characterized in that: The oil collection assembly includes an oil collection pipe (121), the top end of which has an oil collection hole, and the outlet end of the oil collection pipe (121) is connected to the waste oil collection tank (12).

8. The semi-buried oil-water-sludge separation device according to claim 7, characterized in that: The oil collecting pipe (121) includes a first oil collecting branch pipe (1211) opposite to the first sedimentation section (1111), the first oil collecting branch pipe (1211) has a first oil collecting hole (1212) at its top end, the second sedimentation section (1112) is provided with a second oil collecting branch pipe (1213), and the second oil collecting branch pipe (1213) has a second oil collecting hole (1214) at its top end.

9. The semi-buried oil-water-sludge separation device according to claim 8, characterized in that: A first waste oil collection valve is fixedly connected to the first oil collection branch pipe (1211), and the first waste oil collection valve controls the connection of the first oil collection branch pipe (1211). A second waste oil collection valve is fixedly connected to the second oil collection branch pipe (1213), and the second waste oil collection valve controls the connection of the second oil collection branch pipe (1213).

10. The semi-buried oil-water-sludge separation device according to claim 1, characterized in that: The sludge discharge assembly includes a sludge discharge pipe, a sludge discharge valve is fixedly connected to the sludge discharge pipe, and the connection end of the sludge discharge pipe to the waste oil collection tank (12) is located at the bottom end of the side wall of the waste oil collection tank (12).

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