A device for harmless purification of waste drilling fluid

Abstract

The utility model relates to a kind of harmless purification device for waste drilling fluid, the harmless purification device for waste drilling fluid is provided with filter assembly and is provided with sewage pipe, so that it can effectively realize the effect of automatically discharging the solid filtered out in the process of filtering drilling waste liquid during use, avoiding the influence of filtering effect caused by the need for staff to stop processing;By setting the cleaning component and setting multiple cleaning tips that are attached to the upper surface of the filter plate, it can further speed up the cleaning of the solid attached to the top of the filter plate, to ensure its cleaning efficiency of solid, and increase its filtering effect.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment devices, specifically a device for the harmless purification of waste drilling fluid. Background Technology

[0002] Waste drilling fluid purification equipment is a specialized device for the harmless treatment of waste drilling fluids (including drill cuttings, mud, chemical additives, heavy metals, and organic pollutants) generated during oil and gas drilling. Its core function is to separate, degrade, or solidify harmful components (such as heavy metals, oils, and suspended solids) in waste drilling fluids through physical, chemical, or biological methods, ensuring they meet national environmental emission standards or resource utilization requirements. Waste drilling fluid contains a large amount of drill cuttings (particle size 1-1000μm), clay particles (particle size <1μm) and high concentration of suspended solids. Solid-liquid separation must be achieved through filtration devices to prevent solids from clogging subsequent treatment units (such as membrane separation, reverse osmosis, etc.). Traditional equipment lacks an automatic solid waste removal mechanism, causing sediment to gradually accumulate in the filter chamber, forming a "filter cake." This increases filtration resistance, reduces flow rate, and can even lead to equipment shutdown. Manual removal of filter bags or plates and cleaning of solid waste (such as sediment and drill cuttings) is required, which is time-consuming, labor-intensive, and prone to secondary pollution. Therefore, a harmless purification device for waste drilling fluid is proposed to address these problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a device for the harmless purification of waste drilling fluid, which has the advantages of automatic discharge of filter residue, thus solving the problem that existing filtration devices cannot achieve automatic residue discharge.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for the harmless purification of waste drilling fluid, comprising a purification tank, wherein the tank body is provided with a water inlet, a water outlet, and a sewage outlet, and the purification tank is provided with a filter assembly for filtration. The filter assembly includes a filter plate fixedly installed inside the purification tank. The filter plate is adapted to the interior of the purification tank, and its outer periphery forms a sealed connection with the inner wall of the purification tank. The filter plate divides the interior of the purification tank into a clean water area and a drain area. The water inlet is connected to the clean water area, and the drain outlet is connected to the drain area. The filter plate has a coaxial drain port in the middle for discharging material. A drain pipe is connected inside the drain port and is kept in communication with the drain end for discharging the solids produced by filtration.

[0005] Furthermore, a plurality of filter holes for filtration are provided on the annular area formed by the outer edge of the drain outlet and the outer edge of the filter plate.

[0006] Furthermore, the upper surface of the annular region is a concave conical surface.

[0007] Furthermore, a solenoid valve is also installed inside the sewage pipe, which is used to control the discharge of solid materials.

[0008] Furthermore, the cleaning component includes a drive motor, the output shaft of which extends into the interior of the purification tank and is fixedly connected to a connecting shaft, the connecting shaft being connected to a cleaning end via a coupling.

[0009] Furthermore, the cleaning end includes a rod connected to the connecting shaft, and the end of the rod is provided with multiple scrapers, which are in contact with the annular area on the upper surface of the filter plate.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects: I. This device for the harmless purification of waste drilling fluid, by being equipped with a filter assembly and a drain pipe, can effectively and automatically discharge the filtered solids during the filtration of drilling waste fluid, avoiding the need for staff to stop the machine for maintenance and thus affecting the filtration effect.

[0011] Second, this device for the harmless purification of waste drilling fluid, by setting up a cleaning component and having multiple cleaning heads that fit against the upper surface of the filter plate, can further accelerate the cleaning of solids attached to the top of the filter plate, thereby ensuring its cleaning efficiency for solids and increasing its filtration effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of this utility model; Figure 4 This is a schematic diagram of the cleaning component structure of this utility model; Figure 5 This is a schematic diagram of the filter assembly structure of this utility model; Figure 6 This is a schematic diagram illustrating the working principle of this utility model.

[0013] In the diagram: 1. Purification tank; 11. Water inlet; 12. Drain; 13. Sewage outlet; 2. Filter assembly; 21. Filter plate; 22. Sewage outlet; 23. Filter hole; 24. Sewage pipe; 25. Solenoid valve; 3. Cleaning assembly; 31. Drive motor; 32. Connecting shaft; 33. Cleaning end. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1: Please see Figure 1-6 This embodiment of a device for the harmless purification of waste drilling fluid includes a purification tank 1. The purification tank 1 has a water inlet 11, a drain 12, and a sewage discharge 13. The purification tank 1 is equipped with a filter assembly 2 for filtration. The filter assembly 2 includes a filter plate 21 fixedly installed inside the purification tank 1. The filter plate 21 is adapted to the interior of the purification tank 1, and its outer periphery forms a sealed connection with the inner wall of the purification tank 1. The filter plate 21 divides the interior of the purification tank 1 into a clean water area and a drain area. The water inlet 11 is connected to the clean water area, and the drain 12 is connected to the drain area. A sewage discharge port 22 for discharging material is coaxially opened in the middle of the filter plate 21. A sewage discharge pipe 24 is connected to the sewage discharge port 22. The sewage discharge pipe 24 is connected to the sewage discharge end 13 for discharging the filtered solids. In actual use, staff can introduce waste drilling fluid into the purification tank 1 through the water inlet 11. The waste liquid first enters the clean water area separated by the filter plate 21, and then enters the drainage area under the filtration effect of the filter plate 21. After filtration, the liquid with solids will be discharged through the drainage end 12 for further purification. In this process, the filter plate 21 achieves the filtration effect on the waste liquid, blocking the solids contained inside on its surface, and under the action of the cleaning component 3, it enters the drain pipe 24 and is finally discharged through the drain end 13.

[0016] As a preferred technical solution in this embodiment, a plurality of filter holes 23 for filtration are provided on the annular area formed between the outer edge of the drain outlet 22 and the outer edge of the filter plate 21. By providing filter holes 23, the filter plate 21 can effectively achieve a hydrophobic effect during use, and the filter plate 23 can be adjusted by the operator to achieve a good barrier effect against solids.

[0017] As a preferred technical solution in this embodiment, the upper surface of the annular region is a concave conical surface. By setting it as a conical surface, it can effectively ensure that solid matter can roll into the interior of the sewage discharge end 13 under the action of gravity during use, thereby ensuring that it can achieve the effect of automatic cleaning of filter residue during use.

[0018] As a preferred technical solution in this embodiment, a solenoid valve 25 is also provided inside the drain pipe 24. The solenoid valve 25 is used to control the discharge of solid matter. By providing the solenoid valve 25, water flow can be prevented from passing through during use. When the drain pipe 24 continuously cleans the upper surface of the filter plate 21, the solid matter produced by filtration will gradually accumulate inside the drain pipe 24. When it accumulates to a certain extent, the operator can control the solenoid valve 25 to release the seal on the drain pipe 24, thereby allowing the accumulated solid matter to be discharged from the drain end 13, thus ensuring its stability during use.

[0019] As a preferred technical solution in this embodiment: the cleaning component 3 includes a drive motor 31, the output shaft of which passes through the interior of the purification tank 1 and is fixedly connected to a connecting shaft 32. The connecting shaft 32 is connected to a cleaning end 33 via a coupling. By providing the cleaning end 33, a good cleaning effect can be achieved on the upper surface of the filter plate 21, effectively ensuring its cleaning effect during use and further avoiding the situation where the filtration effect is affected by the accumulation of solid matter.

[0020] As a preferred technical solution in this embodiment: the cleaning end 33 includes a rod connected to the connecting shaft 32, and a plurality of scrapers are provided at the end of the rod. The scrapers are in contact with the annular area on the upper surface of the filter plate 21. By providing a plurality of scrapers that are in contact with the annular area, the upper surface of the annular area can be effectively cleaned during use, avoiding the residue of solid matter.

[0021] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for the harmless purification of waste drilling fluid, comprising a purification tank (1), characterized in that: The purification tank (1) is provided with a water inlet (11), a drain (12) and a sewage outlet (13) on its tank body. The purification tank (1) is provided with a filter assembly (2) for filtration and a cleaning assembly (3) for cleaning. The filter assembly (2) includes a filter plate (21) fixedly installed inside the purification tank (1). The filter plate (21) is adapted to the interior of the purification tank (1), and its outer periphery forms a sealed connection with the inner wall of the purification tank (1). The filter plate (21) divides the interior of the purification tank (1) into a clean water area and a drain area. The water inlet (11) is connected to the clean water area, and the drain outlet (12) is connected to the drain area. The filter plate (21) has a drain port (22) coaxially opened in the middle for discharging material. The drain port (22) is connected to a drain pipe (24). The drain pipe (24) is connected to the drain end (13) for discharging solids generated by filtration. The cleaning component (3) includes a drive motor (31), the output shaft of which passes through the interior of the purification tank (1) and is fixedly connected to a connecting shaft (32), and the connecting shaft (32) is connected to a cleaning end (33) via a coupling. The cleaning end (33) includes a rod body connected to the connecting shaft (32), and the end of the rod body is provided with multiple scrapers, which are in contact with the annular area on the upper surface of the filter plate (21).

2. The device for harmless purification of waste drilling fluid according to claim 1, characterized in that: Multiple filter holes (23) for filtration are provided on the annular area formed by the outer edge of the drain outlet (22) and the outer edge of the filter plate (21).

3. The device for harmless purification of waste drilling fluid according to claim 2, characterized in that: The upper surface of the annular region is a concave conical surface.

4. The device for harmless purification of waste drilling fluid according to claim 3, characterized in that: The drain pipe (24) is also equipped with a solenoid valve (25), which is used to control the discharge of solids.

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