Oil-water separation equipment for processing waste mineral oil

Abstract

The utility model relates to the technical field of waste mineral oil recovery, and discloses oil-water separation equipment for waste mineral oil processing, which comprises a separation tank, one side of the separation tank is fixedly communicated with a connecting pipe, one end of the connecting pipe is fixedly communicated with a filter box, and a separation structure for separating oil and water is arranged in the separation tank. Through the arrangement of the separation structure, the gear pump conveys waste oil in the filter tank to the separation tank, the waste oil flows downwards step by step from the uppermost arc plate, the flow speed is reduced step by step, the oil-water contact time is prolonged, layering is promoted, the standing separation efficiency is improved, after the waste oil is accumulated to a certain liquid level, the valve is opened, and settled water is discharged through the discharge pipe; the heating coil heats waste oil and residual water and is connected with the vacuum pump through the exhaust pipe, negative pressure is formed to lower the boiling point of the water and increase the evaporation speed, evaporated water vapor is discharged through the exhaust pipe, the oil-water separation precision is improved, and stable operation of equipment is ensured.

Description

Technical Field

[0001] This utility model relates to the field of waste mineral oil recycling technology, and in particular to an oil-water separation device for waste mineral oil processing. Background Technology

[0002] Waste mineral oil is oil that has been replaced because its original physical and chemical properties have been altered due to contamination by impurities, oxidation, and heat, making it unusable. The recycling of waste mineral oil should preferably employ sedimentation, filtration, distillation, refining, and catalytic cracking processes. The process selection can be based on the degree of contamination of the waste mineral oil and the quality requirements of the recycled products.

[0003] An existing oil-water separation and sedimentation device for waste mineral oil recovery (publication number: CN216629978U) has at least the following drawbacks: Although the above device uses a float with a density between water and oil, which floats on the water surface and sinks below the oil, ensuring that the liquid drawn from the hose is all waste mineral oil, the float's density is between water and oil, making it susceptible to fluctuations in position due to liquid disturbances and fluid flow within the sedimentation tank. This affects the accurate determination of the oil-water interface, reduces separation precision, and ultimately results in poor separation performance. Therefore, we propose this utility model. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an oil-water separation device for waste mineral oil processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An oil-water separation device for waste mineral oil processing includes a separation tank. One side of the separation tank is connected to a fixed connecting pipe, and one end of the connecting pipe is connected to a fixed filter box. The separation tank is equipped with a separation structure for separating oil and water. The separation structure includes several arc plates arranged sequentially in a vertical direction. The arc plates are circular with an arc surface on the top. Adjacent arc plates are fixed to each other, and the size of the arc plates increases sequentially from top to bottom.

[0007] As a further embodiment of this utility model, the other end of the connecting pipe is located above the uppermost arc plate, and one end of the connecting pipe is connected to and fixed inside the gear pump. The lowermost arc plate is fixed to the inner bottom surface of the separation tank, and a heating coil is fixed to the inner bottom surface of the separation tank. The heating coil is located inside the lowermost arc plate. An air extraction pipe is connected to and fixed to the top surface of the separation tank, and a discharge pipe is connected to and fixed to the outer circular wall surface of the separation tank. One end of the discharge pipe is connected to and fixed to a valve.

[0008] As a further embodiment of this utility model, a cooling pipe is fixed to the outer circular wall of the air extraction pipe, and a water inlet pipe and a drain pipe are fixedly connected to the outer circular wall of the cooling pipe.

[0009] As a further embodiment of this utility model, the outer circular wall of the suction pipe is connected to a collection tank, and the collection tank is threadedly connected to the suction pipe.

[0010] As a further embodiment of this utility model, a filter screen is slidably arranged inside the filter box, and sliders are fixed on both sides of the filter screen. Sliding grooves are opened on both sides of the filter box, and the sliders are slidably arranged inside the sliding grooves.

[0011] As a further embodiment of this utility model, the filter screen is arc-shaped, and there is a gap between the filter screen and the inner bottom surface of the filter box.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This oil-water separation and sedimentation equipment, through its separation structure, uses a gear pump to transport waste oil from the filter box to the separation tank. The waste oil flows downwards from the uppermost arc plate in stages, with the flow rate gradually decreasing, extending the oil-water contact time, promoting stratification, and improving the efficiency of static separation. After the waste oil accumulates to a certain level, the valve is opened, and the settled water is discharged through the discharge pipe. The heating coil heats the waste oil and residual water, and a vacuum pump is connected through the extraction pipe to create negative pressure to lower the boiling point of water and accelerate the evaporation rate. The evaporated water vapor is discharged through the extraction pipe, improving the oil-water separation accuracy and ensuring stable equipment operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an oil-water separation device for waste mineral oil processing proposed in this utility model;

[0015] Figure 2 This is a schematic diagram showing the disassembled structure of an oil-water separation device for waste mineral oil processing proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the disassembled structure of the separation tank in an oil-water separation device for waste mineral oil processing proposed in this utility model;

[0017] Figure 4 This is a schematic diagram showing the disassembled structure of the filter box in an oil-water separation device for waste mineral oil processing proposed in this utility model.

[0018] In the diagram: 1. Separation tank; 2. Connecting pipe; 201. Arc plate; 202. Heating coil; 203. Suction pipe; 204. Discharge pipe; 205. Valve; 206. Gear pump; 3. Filter box; 301. Cooling pipe; 302. Water inlet pipe; 303. Drain pipe; 4. Collection tank; 5. Filter screen; 501. Sliding block; 502. Slide groove. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Reference Figures 1-4 An oil-water separation device for waste mineral oil processing includes a separation tank 1. One side of the separation tank 1 is connected to a fixed connecting pipe 2, and one end of the connecting pipe 2 is connected to a fixed filter box 3. The separation tank 1 is equipped with a separation structure for separating oil and water. The separation structure includes a plurality of arc plates 201 arranged sequentially in the vertical direction. The plurality of arc plates 201 are circular and have an arc surface on the top. Adjacent arc plates 201 are fixed to each other. The size of the plurality of arc plates 201 increases sequentially from top to bottom.

[0023] In this embodiment, the other end of the connecting pipe 2 is located above the uppermost arc plate 201. One end of the connecting pipe 2 is connected to and fixed inside the gear pump 206. The lowermost arc plate 201 is fixed to the inner bottom surface of the separation tank 1. A heating coil 202 is fixed to the inner bottom surface of the separation tank 1. The heating coil 202 is located inside the lowermost arc plate 201. The top surface of the separation tank 1 is connected to and fixedly connected to the suction pipe 203. The outer circular wall surface of the separation tank 1 is connected to and fixedly connected to the discharge pipe 204. One end of the discharge pipe 204 is connected to and fixedly connected to the valve 205. Through the separation structure, the operator can input waste oil into the filter box 3 for preliminary filtration through an external device. Subsequently, the gear pump 206 transports the filtered waste oil to the separation tank 1 through the connecting pipe 2. After entering the separation tank 1, the waste oil flows down from the uppermost arc plate 201 step by step. During this process, it flows along the... As the oil slowly slides down the surface of the arc plate 201, its flow rate gradually decreases, thereby prolonging the oil-water contact time and promoting oil-water stratification. As waste oil gradually accumulates in the tank, oil and water naturally separate, improving the settling efficiency of static separation. When the waste oil accumulates to a certain level, the oil-water separation is basically completed. The operator can open valve 205 to discharge the water settled at the bottom of the tank through discharge pipe 204. After completing the initial oil-water separation, the heating coil 202 is started to heat the waste oil and residual water in the tank. During the heating process, the operator can connect an external vacuum pump through the suction pipe 203 to create a negative pressure environment in the separation tank 1, thereby lowering the boiling point of water and accelerating the evaporation rate of water. After the water evaporates, it forms water vapor, which is discharged in time through the suction pipe 203, improving the accuracy and efficiency of oil-water separation and ensuring that the oil-water separation effect of the equipment is stable and reliable.

[0024] In this embodiment, a cooling pipe 301 is fixed to the outer circular wall of the extraction pipe 203. A water inlet pipe 302 and a drain pipe 303 are fixed to the outer circular wall of the cooling pipe 301. When the extraction pipe 203 extracts water vapor and light oil vapor, the operator can connect to an external circulating cooling water device through the water inlet pipe 302 and the drain pipe 303, and use the cooling pipe 301 to condense the water vapor and light oil vapor in the extraction pipe 203.

[0025] In this embodiment, the outer circular wall of the extraction pipe 203 is connected to the collection tank 4, which is threadedly connected to the extraction pipe 203. When the oil and water vapor are condensed, the collection tank 4 collects the droplets in the extraction pipe 203 to avoid pollution from emissions.

[0026] In this embodiment, a filter screen 5 is slidably arranged inside the filter box 3. A slider 501 is fixed on both sides of the filter screen 5. A sliding groove 502 is opened on both sides of the filter box 3. The slider 501 and the sliding groove 502 are slidably arranged inside the filter box 3. Before the waste oil enters the separator 1, the waste oil passes through the filter box 3. The filter screen 5 in the filter box 3 filters the solid particles in the waste oil, reducing the impact on oil-water separation.

[0027] In this embodiment, the filter screen 5 is arc-shaped, and there is a gap between the filter screen 5 and the inner bottom surface of the filter box 3. When waste oil enters the filter box 3, the waste oil directly impacts the inner arc surface of the filter screen 5, and impurities adhere to the surface of the filter screen 5. At the same time, the impact of the waste oil causes the impurities adhered to the surface of the filter screen 5 to flow along the inner arc surface of the filter screen 5 to the lower part of the filter screen 5, thereby effectively extending the replacement and cleaning cycle of the filter screen 5.

[0028] Working Principle: During operation, waste oil is initially filtered by inputting it into filter box 3 via an external device. Then, gear pump 206 pumps the filtered waste oil through connecting pipe 2 to separation tank 1. Upon entering separation tank 1, the waste oil flows downwards from the uppermost arc plate 201, gradually decreasing its flow rate by sliding slowly along the surfaces of different arc plates 201. This prolongs the oil-water contact time and promotes oil-water stratification. As the waste oil accumulates in the tank, the oil and water naturally separate, improving the settling efficiency of static separation. Once the waste oil reaches a certain level, oil-water separation is essentially complete. Operators can then open valve 205 to drain the settled water from the bottom of the tank through discharge pipe 204. After initial oil-water separation, heating coil 202 is activated to heat the waste oil and residual water in the tank. During heating, an external vacuum pump can be connected via suction pipe 203 to create a negative pressure environment inside separation tank 1, thereby lowering the boiling point of the water. To accelerate the evaporation rate of water, water vapor is formed after evaporation and is promptly discharged through the extraction pipe 203, improving the accuracy and efficiency of oil-water separation. When the extraction pipe 203 extracts water vapor and light oil vapor, the operator can connect to the external circulating cooling water equipment through the water inlet pipe 302 and the drain pipe 303, and use the cooling pipe 301 to condense the water vapor and light oil vapor in the extraction pipe 203. After the oil vapor and water vapor are condensed, the collection tank 4 collects the droplets in the extraction pipe 203 to avoid pollution from discharge. Before the waste oil enters the separation tank 1, the waste oil passes through the filter box 3. The filter screen 5 in the filter box 3 filters the solid particles in the waste oil, reducing the impact on oil-water separation. When the waste oil enters the filter box 3, the waste oil directly impacts the inner arc surface of the filter screen 5, and impurities adhere to the surface of the filter screen 5. At the same time, the impact of the waste oil causes the impurities adhering to the surface of the filter screen 5 to flow along the inner arc surface of the filter screen 5 to the lower part of the filter screen 5, thereby effectively extending the replacement and cleaning cycle of the filter screen 5.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An oil-water separation device for waste mineral oil processing, comprising a separation tank (1), characterized in that: One side of the separation tank (1) is connected to a fixed connecting pipe (2), and one end of the connecting pipe (2) is connected to a fixed filter box (3). The separation tank (1) is equipped with a separation structure for separating oil and water. The separation structure includes several arc plates (201) arranged in sequence along the vertical direction. The several arc plates (201) are circular and the top surface is arc. Adjacent arc plates (201) are fixed to each other. The size of the several arc plates (201) increases from top to bottom.

2. The oil-water separation equipment for waste mineral oil processing according to claim 1, characterized in that, The other end of the connecting pipe (2) is located above the uppermost arc plate (201). One end of the connecting pipe (2) is connected to and fixed inside the gear pump (206). The lowermost arc plate (201) is fixed to the inner bottom surface of the separation tank (1). The inner bottom surface of the separation tank (1) is fixed with a heating coil (202). The heating coil (202) is located inside the lowermost arc plate (201). The top surface of the separation tank (1) is connected to and fixed with a suction pipe (203). The outer circular wall surface of the separation tank (1) is connected to and fixed with a discharge pipe (204). One end of the discharge pipe (204) is connected to and fixed with a valve (205).

3. The oil-water separation equipment for waste mineral oil processing according to claim 2, characterized in that, A cooling pipe (301) is fixed to the outer circular wall of the air extraction pipe (203), and a water inlet pipe (302) and a drain pipe (303) are fixed to the outer circular wall of the cooling pipe (301).

4. The oil-water separation equipment for waste mineral oil processing according to claim 3, characterized in that, The outer circular wall of the extraction pipe (203) is connected to a collection tank (4), and the collection tank (4) is threadedly connected to the extraction pipe (203).

5. The oil-water separation equipment for waste mineral oil processing according to claim 4, characterized in that, The filter box (3) is equipped with a filter screen (5) which is slidably arranged inside. The filter screen (5) is fixed with sliders (501) on both sides. The filter box (3) is provided with grooves (502) on both sides inside. The sliders (501) and the grooves (502) are slidably arranged inside.

6. The oil-water separation equipment for waste mineral oil processing according to claim 5, characterized in that, The filter screen (5) is arc-shaped, and there is a gap between the filter screen (5) and the inner bottom surface of the filter box (3).

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