Oil-water separation device

Abstract

The utility model belongs to wastewater treatment device technical field. Oil -water separation device, its characterized by, include: box body, including oil separation tank, water storage tank, oil tank, the oil separation tank is arranged the baffle in, the baffle will the oil separation tank is divided into a plurality of oil separation area, first the oil separation area is set up and goes into the liquid component, the first liquid component is set up between adjacent the oil separation area, is used for connecting adjacent oil separation area and transports waste water, the water storage tank with the second oil separation area between the tail is set up second liquid component, is used for connecting the water storage tank with the second oil separation area and transports waste water, the oil tank with the second oil separation area between the tail is set up and discharges the component. The utility model is used to solve in the existing oil -water separator waste water flow path is relatively short, and the oil drop in waste water and water separation efficiency low technical problem.

Description

Technical Field

[0001] This utility model belongs to the technical field of wastewater separation devices, specifically relating to an oil-water separation device. Background Technology

[0002] With the development of the social economy and the improvement of people's living standards, China's vegetable oil industry has grown at an average annual rate of 5%-6%, making my country a major global producer and consumer of oils. To meet the ever-increasing demand for oils, many large-scale vegetable oil production plants have been built. However, this has also brought about environmental pollution problems. Refining workshops producing bulk vegetable oils generate large amounts of wastewater during processes such as degumming and deacidification. This wastewater contains abundant oil, and recycling this oil can provide additional economic benefits to the oil plants while reducing the workload of wastewater treatment plants. The refining workshop's production process system generates a large amount of oily wastewater, accounting for approximately 60-70% of the total wastewater. This wastewater has a high concentration of organic matter. Currently, many oil plants send this wastewater to wastewater treatment plants for purification after simple sedimentation separation. This method has a simple process route and low investment cost, but the oil removal effect is poor. To recover more oil and reduce the pressure on subsequent wastewater treatment...

[0003] Existing oil-water separators in grease factories separate and recycle grease from wastewater to improve economic efficiency. These separators use a rectangular container of a certain volume. During wastewater flow, the density difference between grease and water causes oil droplets to rise from suspension and accumulate on the surface. Once a certain thickness of grease has accumulated, it is collected and discharged through the oil collection port. However, existing oil-water separators have the following technical problems: the wastewater flows a relatively short distance within the tank, resulting in a short residence time, which prevents tiny oil droplets from reaching the surface. Utility Model Content

[0004] The purpose of this invention is to provide an oil-water separation device to solve the technical problem that the wastewater flow path is relatively short in existing oil-water separators, resulting in low separation efficiency of oil droplets and water in the wastewater.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an oil-water separation device, characterized in that it includes:

[0006] The housing includes an oil distribution tank, a water storage tank, and an oil storage tank;

[0007] The oil separator is equipped with a partition that divides the oil separator into several oil separation zones; a liquid inlet assembly is provided on the first oil separation zone; a first liquid delivery assembly is provided between adjacent oil separation zones for connecting adjacent oil separation zones and delivering wastewater; a second liquid delivery assembly is provided between the water storage tank and the last oil separation zone for connecting the water storage tank and the last oil separation zone and delivering wastewater.

[0008] An oil draining assembly is provided between the oil storage tank and the tail oil distribution zone.

[0009] This invention divides the entire tank space into three areas: a water tank, an oil tank, and an oil separation tank. The oil separation tank is further divided into three areas, increasing the flow path and residence time of wastewater within the tank, ensuring that tiny oil droplets in the water float to the surface promptly. Wastewater is discharged through the inlet assembly and enters the first oil separation zone. Because oil droplets and water are immiscible, under the influence of buoyancy, the oil droplets float upwards and collect on the upper surface of the wastewater. The wastewater then passes through the first (second) inlet assembly and enters the next oil separation zone. The larger the oil droplets in the wastewater, the faster they float upwards and collect. This invention improves oil-water separation efficiency, resulting in high grease recovery efficiency, low oil droplet content in the discharged liquid, and increased economic benefits for grease plants.

[0010] To solve the technical problem of how to implement the liquid inlet assembly, the present invention adopts the following technical solution: the liquid inlet assembly is vertically arranged on one side of the first oil separation zone;

[0011] The top end of the liquid inlet assembly extends outside the first oil separation zone; the bottom end of the liquid inlet assembly is located at the bottom of the first oil separation zone; the number of liquid inlet assemblies is 1-4.

[0012] This invention extends the liquid inlet assembly into the bottom of the oil separation zone. There is a certain water height outside the liquid inlet assembly, and under the action of water pressure, there is a certain wastewater height inside the liquid inlet assembly. This buffers the wastewater discharged through the external pipe, reduces the turbulence of the water flow at the lower pipe end, and facilitates the separation of oil droplets and water.

[0013] To further address the technical problem of low oil-water separation efficiency, this utility model adopts the following technical solution: adjacent first liquid delivery components are arranged diagonally along the wastewater conveying direction. Wastewater travels diagonally from oil separation zone one (two) to oil separation zone two (three), further increasing the relatively short flow path of wastewater within the tank and further increasing the residence time, ensuring that tiny oil droplets in the water float to the surface in a timely manner.

[0014] To address the technical problem of how to implement the first infusion assembly, this utility model adopts the following technical solution: the first infusion assembly includes:

[0015] The first infusion tube is vertically installed on the oil separation zone, with its top end located above the highest liquid level in the oil separation zone and its bottom end located at the bottom of the oil separation zone.

[0016] The second infusion tube is arranged horizontally, with one end of the second infusion tube disposed on the first infusion tube and the other end of the second infusion tube disposed on the corresponding partition plate. Adjacent oil separation zones are connected via the first infusion tube and the second infusion tube.

[0017] In this invention, wastewater enters the first infusion pipe through the lower end of the vertical first infusion pipe of the first infusion assembly. The flow rate of the wastewater in the first infusion pipe increases, which intensifies the collision between tiny oil droplets. Small oil droplets aggregate into larger droplets and reach the position of the horizontal second infusion pipe to be discharged into the next oil separation zone.

[0018] To address the technical problem of how to implement the second infusion assembly, this utility model adopts the following technical solution, wherein the second infusion assembly includes:

[0019] The third infusion tube is vertically installed on the oil separation area mentioned at the tail.

[0020] The fourth infusion tube is arranged horizontally, with one end of the fourth infusion tube attached to the third infusion tube. The water storage tank and the oil separation zone at the tail are connected via the third infusion tube and the fourth infusion tube.

[0021] Wastewater enters through the bottom of the vertical third infusion pipe of the second infusion assembly, and then enters the water storage tank through the horizontal fourth infusion pipe 172 for storage and discharge.

[0022] The temperature of the delivered wastewater is affected by the operating process and the ambient temperature. Too low a temperature is detrimental to oil separation. To solve this technical problem, this invention adopts the following technical solution: a heating coil assembly is installed in the oil separation zone. Increasing the temperature reduces the viscosity of oil and water, decreases the resistance of oil droplets, and accelerates the rising speed of smaller oil particles.

[0023] To solve the technical problem of how to install the heating coil assembly, this utility model adopts the following technical solution: heating coil assemblies are installed in all areas except the oil distribution area described above.

[0024] To solve the technical problem of non-adjustable oil collection height, this utility model adopts the following technical solution: the oil collection height of the oil discharge component is adjustable. This utility model's oil discharge component has an adjustable oil collection height structure, facilitating height adjustment for oil collection based on the oil content in the wastewater.

[0025] To address the technical problem of how to implement the oil drainage component, this utility model adopts the following technical solution, wherein the oil drainage component includes:

[0026] First threaded pipe;

[0027] The second threaded tube is connected to the first threaded tube;

[0028] A horizontal pipe is provided, one end of which is connected to the second threaded pipe via an elbow, and the other end of which is disposed on the side wall of the oil reservoir. The threaded pipe assembly is used to adjust the oil draw-in height.

[0029] To solve the technical problem of not being able to know the water level in the water storage tank, this utility model adopts the following technical solution: a level gauge interface is provided on the water storage tank for installing a level gauge, which can indicate the water level on site and facilitate discharge operations.

[0030] To solve the technical problem of not being able to know the liquid level in the oil storage tank, this utility model adopts the following technical solution: the oil storage tank is equipped with a liquid level alarm interface for installing a liquid level alarm, which sends low liquid level and high liquid level signals to interlock and control the start and stop of the oil pump. Attached Figure Description

[0031] Figure 1 This is a cross-sectional view of the oil-water separation device of this utility model;

[0032] Figure 2 This is a top view of the oil-water separation device of this utility model;

[0033] Figure 3 This is a cross-sectional view of the casing of the oil-water separation device of this utility model;

[0034] Figure 4 This is a top view of the housing of the oil-water separation device of this utility model;

[0035] Figure 5 This is a side view of the first infusion assembly of the oil-water separation device of this utility model;

[0036] Figure 6 This is a top view of the first infusion assembly of the oil-water separation device of this utility model;

[0037] Figure 7 This is a schematic diagram of the oil discharge component of the oil-water separation device of this utility model;

[0038] In the picture:

[0039] 10. Oil-water separator;

[0040] 100-point oil tank; 110-point oil zone one; 120-point oil zone two; 130-point oil zone three; 140-point partition; 150-point liquid inlet assembly; 160-point first infusion assembly; 161-point first infusion tube; 162-point second infusion tube; 170-point second infusion assembly; 171-point third infusion tube; 172-point fourth infusion tube;

[0041] 200 water storage tank; 201 level gauge interface;

[0042] 300 Oil reservoir; 310 Oil drain assembly; 311 First threaded pipe; 312 Second threaded pipe; 313 Elbow; 314 Horizontal pipe; 315 Handle; 316 Rotary handle; 317 Locking ring; 320 Oil drain port; 330 Liquid level alarm interface;

[0043] 410 heating coil assembly one; 420 heating coil assembly two;

[0044] 500 drain outlet;

[0045] 600 support frame;

[0046] 700 inspection port. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings.

[0048] like Figure 1-4 As shown, the oil-water separator 10 includes a housing. A support frame 600 is installed at the bottom of the housing. The support frame 600 includes channel steel. The housing includes an oil separator 100, a water storage tank 200, and an oil storage tank 300. An inspection port 700 is provided at the top of the housing.

[0049] The oil separator 100 is equipped with a partition 140, which is welded to the inside of the tank on three sides. The partition 140 divides the oil separator into several oil separation zones. Specifically, there are three oil separation zones, namely, oil separation zone one 110, oil separation zone two 120, and oil separation zone three 130 arranged sequentially along the wastewater conveying direction. Oil separation zone one 110 is the first oil separation zone. Oil separation zone two 120 is the middle oil separation zone. Oil separation zone three 130 is the last oil separation zone. This utility model divides the entire tank space into three areas: a water storage tank, an oil storage tank, and an oil separator, and further divides the oil separator into three areas.

[0050] A liquid inlet assembly is provided on the oil separation zone 110. In one embodiment, the liquid inlet assembly 150 is vertically arranged on one side of the oil separation zone 110. The top end of the liquid inlet assembly 150 extends outside the oil separation zone 110; the bottom end of the liquid inlet assembly 150 is located at the bottom of the oil separation zone 110. Multiple liquid inlet assemblies 150 are provided depending on the number of devices discharging wastewater. Preferably, the number of liquid inlet assemblies 150 is 1-4.

[0051] This invention extends the liquid inlet assembly into the bottom of the oil separation zone. There is a certain water height outside the liquid inlet assembly, and under the action of water pressure, there is a certain wastewater height inside the liquid inlet assembly. This buffers the wastewater discharged through the external pipe, reduces the turbulence of the water flow at the lower pipe end, and facilitates the separation of oil droplets and water.

[0052] A first infusion assembly 160 is provided between adjacent oil separation zones to connect the adjacent oil separation zones and transport wastewater. In one embodiment, such as... Figure 5 , Figure 6 As shown, the first infusion assembly 160 includes a first infusion tube 161 and a second infusion tube 162. The first infusion tube 161 is vertically arranged, with its top end located above the highest liquid level in the oil separation zone and its bottom end located at the bottom of the oil separation zone. The second infusion tube 162 is horizontally arranged, with one end of the second infusion tube 162 attached to the first infusion tube 161 and the other end attached to the corresponding partition 140. Adjacent oil separation zones are connected via the first infusion tube and the second infusion tube.

[0053] In one embodiment, adjacent first infusion assemblies 160 are arranged diagonally along the wastewater transport direction. Wastewater between oil separation zone one 110 and oil separation zone two 120 can only pass through the channels of the first infusion pipe 161 and the second infusion pipe 162. Wastewater between oil separation zone 120 and oil separation zone three 130 can only pass through the channels of the first infusion pipe 161 and the second infusion pipe 162.

[0054] A second infusion assembly 170 is installed between the water storage tank and the tail oil separation zone to connect the two areas and transport wastewater. In one embodiment, the second infusion assembly 170 includes a third infusion pipe 171 and a fourth infusion pipe 172. The third infusion pipe 171 is vertically disposed within the tail oil separation zone 130. The fourth infusion pipe 172 is horizontally disposed, with one end connected to the third infusion pipe 171. The water storage tank and the tail oil separation zone 130 are connected via the third and fourth infusion pipes. The second infusion assembly 170 is used to discharge wastewater into the water storage tank for storage and discharge.

[0055] This invention features three sets of infusion components inside the tank, dividing it into three main oil separation zones. In these zones, the flow direction and speed of wastewater change, accelerating the aggregation and rising speed of oil droplets, resulting in a decrease in the oil content in the wastewater.

[0056] Wastewater enters the vertical first (third) infusion pipe from the bottom of the first (second) infusion assembly, slowly rises to the horizontal second (fourth) infusion pipe, and is discharged into the next area; oil droplets float to the surface of the wastewater, ensuring that the flow of wastewater can only enter from the bottom of the vertical first (third) infusion pipe of the first (second) infusion assembly, rise along the first (third) infusion pipe, and flow out to the horizontal second (fourth) infusion pipe.

[0057] The height of the second transverse infusion tube of the first infusion assembly is the same in both oil separation zone one and oil separation zone two. The lowest point of the fourth transverse infusion tube of the second infusion assembly is 20mm higher than the lowest point of the second transverse infusion tube of the first infusion assembly.

[0058] An oil drain assembly 310 is provided between the oil storage tank 300 and the oil distribution zone 3130. In one embodiment, the oil collection height of the oil drain assembly is adjustable. Specifically, as shown... Figure 7As shown, the oil drain assembly includes a first threaded pipe 311, a second threaded pipe 312, an elbow 313, and a horizontal pipe 314. The second threaded pipe 312 is connected to the first threaded pipe 311. One end of the horizontal pipe 314 is connected to the second threaded pipe 312 via the elbow 313, and the other end of the horizontal pipe 314 is located on the side wall of the oil reservoir 300. A handle 315 is installed on the first threaded pipe 311. A rotating handle 316 is installed on the second threaded pipe 312. A locking ring 317 is provided between the first threaded pipe 311 and the second threaded pipe 312.

[0059] Working principle of the oil drain assembly: The first threaded tube 311 is machined into a fine external thread, and the second threaded tube 312 is machined into a corresponding fine internal thread. The handle 315 is welded to the outside of the first threaded tube 311. Rotating the handle 311 moves the first threaded tube 311 up and down, thereby adjusting the height of the upper end face of the first threaded tube 311. After proper adjustment, the second threaded tube 312 is rotated through the handle 316, applying a pre-tightening force to the first threaded tube 311. At the contact point between the first threaded tube 311 and the locking ring 317, the thread is subjected to a vertical force, and the thread contact surface fits tightly. Wastewater cannot seep into the inside of the steel pipe through this part, resulting in a good sealing effect.

[0060] This utility model features an adjustable oil collection height structure, allowing for convenient height adjustment based on the oil content in the wastewater. The oil collection component is located at three positions within the oil separation zone, through which the grease accumulated on the surface of the wastewater enters the oil storage tank for storage and discharge.

[0061] The temperature of the wastewater is affected by the operating process and the ambient temperature. Too low a temperature is detrimental to oil separation; a higher temperature reduces the viscosity of oil and water, decreases the resistance of oil droplets, and accelerates the rising speed of smaller oil particles. In one embodiment, a heating coil assembly is installed in the oil separation zone. Specifically, a heating coil assembly 410 is installed at the bottom of oil separation zone two 120, and a heating coil assembly 420 is installed at the bottom of oil separation zone three 130. Steam is introduced according to process requirements to regulate the wastewater temperature inside the tank. After passing through this oil-water separator, the oil is collected and recovered, reducing the oil content of the discharged wastewater to the discharge standard, and subsequently entering the sewage network for wastewater treatment, reducing the wastewater treatment load. The economic value of the recovered oil is increased, while the wastewater treatment costs of the oil plant are reduced. Oil and water can only flow and separate better at a certain temperature. This invention adds two sets of heating coil assemblies to heat the wastewater inside the tank, accelerating oil-water separation.

[0062] In one embodiment, a level gauge interface 201 is provided on the water storage tank 200 for installing a level gauge. A magnetic float level gauge is preferred. This invention allows for on-site indication of water level, facilitating discharge operations.

[0063] In one embodiment, a level alarm interface 330 is provided on the oil tank 300 for installing high and low level alarms. The high and low level alarms send low and high level signals, interlocking to control the start and stop of the oil pump.

[0064] Oily wastewater discharged from the oil refining section is separated from water using the principle that oil and water have different densities and are immiscible. The separated oil is recycled, while the wastewater is discharged into the sewage network for purification treatment. The working process of the oil-water separation unit is as follows:

[0065] In the oil refining workshop, during the degumming and deacidification processes of oils, the oily wastewater discharged from the equipment is transported through pipelines to the oil-water separator inlet assembly 150. The wastewater is discharged from the bottom of the inlet assembly 150 and enters the first oil separation zone 110. Because oil droplets and water are immiscible, under the influence of buoyancy, the oil droplets float upwards and collect on the upper surface of the wastewater. The wastewater then enters the first vertical inlet pipe 161 of the first inlet assembly 160. The flow rate of the wastewater increases within this pipe, intensifying the collisions between tiny oil droplets. Smaller oil droplets coalesce into larger ones, reaching the second horizontal inlet pipe 162 and being discharged into the second oil separation zone 120. The larger the oil droplets in the wastewater, the more easily they float upwards and collect. Wastewater flows diagonally from oil separation zone 2 (120) to the lower end of the vertical first infusion pipe 161 of the first infusion assembly 160 in oil separation zone 3 (130). Similarly, it enters oil separation zone 3 (130) via the first infusion pipe 161 and the second infusion pipe 162, where oil particles in the wastewater float upwards and separate. The oil layer on the surface of the wastewater is finally collected by the oil discharge assembly 310 and stored in the oil storage tank 300 for discharge. Wastewater enters through the bottom of the vertical third infusion pipe 171 of the second infusion assembly 170 and enters the water storage tank 200 via the horizontal fourth infusion pipe 172 for storage and discharge. Each zone is equipped with a drain outlet 500 to clean and discharge the waste residue that settles at the bottom.

[0066] The above embodiments are only for illustrating the technical features and concept of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made according to the spirit and implementation of this utility model should be covered within the protection scope of this utility model.

Claims

1. An oil-water separation device, characterized in that, include: The housing includes an oil distribution tank, a water storage tank, and an oil storage tank; The oil separator is equipped with a partition that divides the oil separator into several oil separation zones; a liquid inlet assembly is provided on the first oil separation zone; a first liquid delivery assembly is provided between adjacent oil separation zones for connecting adjacent oil separation zones and delivering wastewater; a second liquid delivery assembly is provided between the water storage tank and the last oil separation zone for connecting the water storage tank and the last oil separation zone and delivering wastewater. An oil draining assembly is provided between the oil storage tank and the tail oil distribution zone.

2. The oil-water separation device according to claim 1, characterized in that, The liquid inlet assembly is vertically arranged on one side of the first oil separation zone; The top end of the liquid inlet assembly extends outside the first oil separation zone; the bottom end of the liquid inlet assembly is located at the bottom of the first oil separation zone; the number of liquid inlet assemblies is 1-4.

3. The oil-water separation device according to claim 1, characterized in that, The adjacent first infusion assemblies are arranged diagonally along the wastewater transport direction.

4. The oil-water separation device according to claim 3, characterized in that, The first infusion assembly includes: The first infusion tube is vertically installed on the oil separation zone, with its top end located above the highest liquid level in the oil separation zone and its bottom end located at the bottom of the oil separation zone. The second infusion tube is arranged horizontally, with one end of the second infusion tube disposed on the first infusion tube and the other end of the second infusion tube disposed on the corresponding partition plate. Adjacent oil separation zones are connected via the first infusion tube and the second infusion tube.

5. The oil-water separation device according to claim 4, characterized in that, The second infusion assembly includes: The third infusion tube is vertically installed on the oil separation area mentioned at the tail. The fourth infusion tube is arranged horizontally, with one end of the fourth infusion tube attached to the third infusion tube. The water storage tank and the oil separation zone at the tail are connected via the third infusion tube and the fourth infusion tube.

6. The oil-water separation device according to claim 1, characterized in that, A heating coil assembly is installed in the oil separation zone.

7. The oil-water separation device according to claim 6, characterized in that, Heating coil assemblies are installed in all oil separation zones except those mentioned above.

8. The oil-water separation device according to claim 1, characterized in that, The oil collection height of the oil discharge component is adjustable.

9. The oil-water separation device according to claim 8, characterized in that, The oil drainage assembly includes: First threaded pipe; The second threaded tube is connected to the first threaded tube; A horizontal pipe, one end of which is connected to the second threaded pipe via an elbow, and the other end of which is disposed on the side wall of the oil storage tank.

10. The oil-water separation device according to claim 1, characterized in that, The water storage tank is equipped with a level gauge interface for installing a level gauge; The oil storage tank is equipped with a liquid level alarm interface for installing a liquid level alarm.

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