Oil-water separation device and separation method

Abstract

The present invention relates to the technical field of oil-water treatment, and in particular to an oil-water separation device and a separation method, comprising a warehouse body, wherein N-stage compartments are arranged in the warehouse body, and the second-stage compartments to the N-stage compartments are separated by partitions, and the partitions are hydrophilic and oleophobic filter cotton partitions. The warehouse body is provided with a water inlet for injecting a liquid to be separated in the first-stage compartment, at least the side wall of the first-stage compartment is provided with an oil outlet, and the N-stage compartment is provided with a water outlet. The present invention sets a plurality of compartments and combines the hydrophilic and oleophobic filter cotton partitions to make the oil-water separator have a high separation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-water treatment, and in particular to an oil-water separation device and a separation method. Background Art

[0002] Oily wastewater mainly comes from industrial production and human life. Industrial production produces a large amount of oily wastewater, such as wastewater generated during oil extraction, processing, refining and transportation, wastewater in machinery manufacturing and wastewater in life. At present, oil-water separators are used in industrial applications for oil-water separation, but there are generally problems such as low separation efficiency, easy to be affected by water flow velocity or disturbance, and incomplete oil-water separation. Summary of the invention

[0003] In order to solve the problems of low separation efficiency, easy influence by water flow velocity or disturbance, and incomplete oil-water separation in the prior art, the present invention provides an oil-water separation device and separation method with high efficiency and good separation effect.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] An oil-water separation device comprises a storage body, wherein the storage body is provided with N-level compartments, the second-level compartments to the N-th-level compartments are separated by partitions, the partitions are hydrophilic and oleophobic filter cotton partitions, the storage body is provided with a water inlet for injecting a liquid to be separated in the first-level compartment, at least the side wall of the first-level compartment is provided with an oil outlet, and the N-th-level compartment is provided with a water outlet.

[0006] Furthermore, a flow stabilizer is fixed at the bottom of the first-stage compartment to prevent oil and water from splashing and flowing downstream after being injected. The first-stage compartment and the second-stage compartment are separated by an oil separator, and there is a gap between the oil separator and the bottom surface of the compartment body.

[0007] Furthermore, a fixed plate is fixed at the bottom end of the N-level compartment, a lifting plate is slidably provided on the fixed plate, the lifting plate is fitted with the fixed plate, and the lifting plate and the fixed plate always have an overlapping part, the water in the N-level compartment overflows the upper end of the lifting plate and is discharged from the water outlet, the highest position of the lifting plate is lower than the oil outlet, and the lowest position of the lifting plate is higher than the water outlet.

[0008] Furthermore, a liquid level lifting box connected to the compartment wall is provided above the first-stage compartment, the oil outlet of the first-stage compartment is arranged beside the liquid level lifting box, and the oil outlet of the first-stage compartment is higher than the bottom end of the liquid level lifting box.

[0009] Furthermore, the water inlet passes through the liquid level lifting box.

[0010] Furthermore, oil outlets are provided at upper positions of the side walls of the front N-1 level compartments, and all the oil outlets are at the same height and are externally connected to the same oil outlet pipe.

[0011] Furthermore, the water outlet is connected to a water outlet pipe, and a vent pipe is also provided outside the warehouse body, and the vent pipe is connected to the bottom of all the compartments.

[0012] Furthermore, the oil outlet pipe, water outlet pipe and vent pipe are all provided with control valves.

[0013] A separation method of the oil-water separation device as described above comprises the following steps:

[0014] Step 1: First, inject clean water into the first compartment through the water inlet, block it through the flow stabilizer, and overflow through the flow stabilizer, and flow into the compartment below through the gap between the oil separator and the bottom wall of the compartment. When the water level of all compartments is higher than the gap between the oil separator and the bottom wall of the compartment, stop injecting water and start injecting the oil and water to be separated;

[0015] Step 2: The injected oil and water float on the water surface. When the oil reaches the oil outlet, the oil overflows from the oil outlet. After being filtered by the hydrophilic and oleophobic filter cotton partition, the oil and water overflow from the lifting plate when reaching the Nth-level compartment and are discharged from the water outlet.

[0016] Step 3: According to the oil content in the oil and water, adjust the height of the lifting plate to adjust the water level of all compartments.

[0017] Beneficial effects:

[0018] (1) By setting up multiple compartments and combining hydrophilic and oleophobic filter cotton partitions, the oil-water separator has high separation efficiency and less interference factors;

[0019] (2) The liquid level lifting box reduces the liquid filling area above the first compartment. When the same volume of oil and water is injected, the height of the oil will increase rapidly after the liquid level lifting box is added, which is convenient for rapid oil discharge.

[0020] (3) The liquid level of all compartments can be adjusted by the lifting plate. For example, when the oil content in the oil-water is low, the height of the lifting plate is raised; when the oil content in the oil-water is high, the height of the lifting plate is appropriately lowered. The system has a wide range of adaptability and high adjustability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a schematic diagram of the internal structure of an oil-water separation device of the present invention;

[0023] Figure 2The figure is a schematic diagram of the top view of the structure of an oil-water separation device of the present invention.

[0024] Among them, 1. bin body, 2. partition, 3. water inlet, 4. oil outlet, 5. water outlet, 6. flow stabilizing plate, 7. oil separator, 8. fixed plate, 9. lifting plate, 11. liquid level lifting box. DETAILED DESCRIPTION

[0025] like Figures 1-2 An oil-water separation device comprises a storage body 1, in which N levels of compartments are arranged, and the second level compartments to the Nth level compartments are separated by partitions 2, and the partitions 2 are hydrophilic and oleophobic filter cotton partitions 2. The storage body 1 is provided with a water inlet 3 for injecting a liquid to be separated in the first level compartment, at least the side wall of the first level compartment is provided with an oil outlet 4, and the Nth level compartment is provided with a water outlet 5.

[0026] A flow stabilizer 6 is fixed at the bottom of the first-stage compartment to prevent oil and water from splashing and flowing downstream after being injected. The first-stage compartment and the second-stage compartment are separated by an oil separator 7, and there is a gap between the oil separator 7 and the bottom wall of the compartment body 1.

[0027] A fixed plate 8 is fixed at the bottom end of the N-level compartment, and a lifting plate 9 is slidably provided on the fixed plate 8. The lifting plate 9 is in contact with the fixed plate 8, and the lifting plate 9 and the fixed plate 8 always have an overlapping part. The water in the N-level compartment overflows the upper end of the lifting plate 9 and is discharged from the water outlet 5. The highest position of the lifting plate 9 is lower than the oil outlet 4, and the lowest position of the lifting plate 9 is higher than the water outlet 5.

[0028] A liquid level lifting box 11 connected to the warehouse wall is provided above the first compartment, and an oil outlet 4 of the first compartment is provided beside the liquid level lifting box 11, and the oil outlet 4 of the first compartment is higher than the bottom end of the liquid level lifting box 11. The water inlet 3 passes through the liquid level lifting box 11.

[0029] The upper side walls of the front N-1 level compartments are all provided with oil outlets 4, and all the oil outlets 4 are at the same height and are externally connected to the same oil outlet pipe.

[0030] The water outlet 5 is externally connected to a water outlet pipe, and a vent pipe is also provided outside the bin body 1, and the vent pipe is communicated with the bottom of all the compartments.

[0031] Control valves are provided on the oil outlet pipe, water outlet pipe and vent pipe. The control valves can be manual valves or electric valves.

[0032] A separation method of the oil-water separation device as described above comprises the following steps:

[0033] Step 1: First, inject clean water into the first compartment through the water inlet 3, block it through the flow stabilizer 6, and overflow through the flow stabilizer 6, and flow into the compartment below through the gap between the oil separator 7 and the bottom wall of the bin body 1. When the water level of all compartments is higher than the gap between the oil separator 7 and the bottom wall of the bin body 1, stop injecting water and start injecting the oil and water to be separated;

[0034] Step 2: The injected oil and water float on the water surface. When the oil reaches the oil outlet 4, the oil overflows from the oil outlet 4. After being filtered by the hydrophilic and oleophobic filter cotton partition 2, the oil and water overflow from the lifting plate 9 when reaching the Nth level compartment and are discharged from the water outlet 5.

[0035] Step 3: According to the oil content in the oil-water, adjust the height of the lifting plate 9, thereby adjusting the water level of all compartments.

[0036] Working principle of the partition: After the oil and water are filtered through the hydrophilic and oleophobic filter cotton partition, the oil molecules are intercepted by the filter screen, and the intercepted oil molecules continue to float up. After floating up, the oil molecules continue to gather, and the liquid level rises. When the height rises to the oil drain port, it is automatically discharged through the oil drain port.

[0037] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. An oil-water separation device, characterized in that : comprising a warehouse body (1), wherein the warehouse body (1) is provided with N-level compartments, the second-level compartments to the N-level compartments are separated by partitions (2), the partitions (2) are hydrophilic and oleophobic filter cotton partitions (2), the warehouse body (1) is provided with a water inlet (3) for injecting a liquid to be separated in the first-level compartment, the side walls of the first N-1-level compartments are provided with oil outlets (4) at the upper position, all the oil outlets (4) are at the same height and are externally connected to the same oil outlet pipe, and the N-level compartment is provided with a water outlet (5); A flow stabilizing plate (6) is fixed at the bottom of the first-stage compartment to prevent oil and water from splashing and flowing downstream after being injected; the first-stage compartment and the second-stage compartment are separated by an oil separator (7); and a gap is provided between the oil separator (7) and the bottom wall of the compartment body (1); A fixed plate (8) is fixed at the bottom end of the N-level compartment, a lifting plate (9) is slidably provided on the fixed plate (8), the lifting plate (9) is in contact with the fixed plate (8), and the lifting plate (9) and the fixed plate (8) always have an overlapping portion, the water in the N-level compartment overflows the upper end of the lifting plate (9) and is discharged from the water outlet (5), the highest position of the lifting plate (9) is lower than the oil outlet (4), and the lowest position of the lifting plate (9) is higher than the water outlet (5); A liquid level lifting box (11) connected to the chamber wall is provided above the first-stage compartment, the oil outlet (4) of the first-stage compartment is provided beside the liquid level lifting box (11), and the oil outlet (4) of the first-stage compartment is higher than the bottom end of the liquid level lifting box (11); The water inlet (3) passes through the liquid level lifting box (11).

2. The oil-water separation device according to claim 1, characterized in that: The water outlet (5) is externally connected to a water outlet pipe, and the exterior of the warehouse body (1) is also provided with a vent pipe, and the vent pipe is connected to the bottom of all compartments.

3. The oil-water separation device according to claim 2, characterized in that: The oil outlet pipe, water outlet pipe and vent pipe are all provided with control valves.

4. A separation method for an oil-water separation device according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: First, clean water is injected into the first compartment through the water inlet (3), blocked by the flow stabilizing plate (6), overflowing through the flow stabilizing plate (6), and flowing into the compartment below through the gap between the oil separator (7) and the bottom wall of the compartment body (1). When the water level in all compartments is higher than the gap between the oil separator (7) and the bottom wall of the compartment body (1), the water injection is stopped and the oil and water to be separated are injected; Step 2: The injected oil and water float on the water surface. When the oil reaches the oil outlet (4), the oil overflows from the oil outlet (4). After being filtered by the hydrophilic and oleophobic filter cotton partition (2), the oil and water overflow from the lifting plate (9) when reaching the Nth-level compartment and are discharged from the water outlet (5). Step 3: According to the oil content in the oil-water, adjust the height of the lifting plate (9) to adjust the water level of all compartments.

Images