Oil-water separation device for industrial wastewater treatment

Abstract

The utility model provides an oil -water separation device for industrial wastewater treatment belongs to industrial wastewater treatment technical field, it has solved the problem that oil will be discharged from the water outlet pipe in the existing oil -water separation device. The oil -water separation device for industrial wastewater treatment, including the cylinder that has the cavity inside, be located on the water inlet joint of cylinder, water outlet joint, oil outlet and slag outlet, be equipped with the filter screen for separating the cavity into upper cavity and lower cavity in the cylinder, water inlet joint is connected with lower cavity, slag outlet is located in the bottom of lower cavity, oil outlet is equipped in the top of upper cavity, water outlet joint is connected with upper cavity, is equipped with pressure control valve at water outlet joint, the water level in upper cavity is higher than water outlet joint when pressure control valve opens. Because being equipped with pressure control valve, when the water pressure in upper cavity reaches the setting pressure that can break through pressure control valve, pressure control valve opens, prevents oil from flowing out from water outlet joint.

Description

Technical Field

[0001] This utility model belongs to the field of industrial wastewater treatment technology, and relates to an oil-water separation device for industrial wastewater treatment. Background Technology

[0002] Currently, petroleum, chemical, and machinery processing enterprises in my country generally generate large amounts of oily industrial wastewater during their production processes. Direct discharge of this oily wastewater would cause serious damage to the natural environment; therefore, oil-water separation treatment is necessary before discharge. The common method is to pass the oily wastewater into a container and utilize the density difference between water and oil to cause the oily pollutants to float to the liquid surface and be discharged through the overflow outlet, thus achieving oil-water separation – a process known as gravity separation. For example, a Chinese patent discloses an oil-water separation device for industrial wastewater treatment [authorization announcement number 207581562U], which includes a main body, an inlet, an aeration device, a primary separation zone, a secondary separation zone, a tertiary separation zone, an oil drain pipe, and a drain pipe. The main body has an inlet at the top, a filter screen at one side of the lower part of the inlet, a horizontal plate at the lower end of the baffle, an aeration device at one side of the lower part of the horizontal plate, a partition I at one end of the horizontal plate, a partition II at the left side of the partition I, a primary separation zone is formed between the partition I and the partition II, a secondary separation zone is formed between the partition II and the partition III at the left side of the partition II, a tertiary separation zone is formed between the partition III and the baffle, and an oil drain pipe at one side of the upper part of the tertiary separation zone, and a drain pipe at one side of the lower part of the oil drain pipe.

[0003] The drain pipe and oil drain pipe of the above-mentioned oil-water separation device are directly connected to the three-stage separation zone. When the water level in the three-stage separation zone cannot be effectively controlled, the drop in water level will inevitably cause oil to be discharged from the drain pipe. Oil and water enter from above the filter screen, and the solid particles filtered by the filter screen remain above the filter screen, which is inconvenient to clean. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an oil-water separation device for industrial wastewater treatment that prevents oil from being discharged from the outlet pipe.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An oil-water separation device for industrial wastewater treatment includes a cylindrical body with an internal cavity, an inlet connector, an outlet connector, an oil outlet, and a sludge outlet on the cylindrical body. The cylindrical body is equipped with a filter screen that divides the cavity into an upper cavity and a lower cavity. The inlet connector is connected to the lower cavity. The sludge outlet is located at the bottom of the lower cavity. The oil outlet is located at the top of the upper cavity. The outlet connector is connected to the upper cavity. A pressure control valve is provided at the outlet connector. When the pressure control valve is open, the water level in the upper cavity is higher than that at the outlet connector.

[0007] During oil-water separation, the slag outlet is closed, and industrial wastewater is continuously fed into the lower chamber through the inlet connector. Solid particles are blocked in the lower chamber by the filter screen, while oil and water rise to the upper chamber through the filter screen and gradually separate into layers in the upper chamber, with oil in the upper layer and water in the lower layer. When the water pressure in the upper chamber reaches a level that exceeds the set pressure of the pressure control valve, the pressure control valve opens, and water flows out from the outlet connector. When the pressure drops, the pressure control valve automatically closes to prevent oil from flowing out from the outlet connector.

[0008] When a large amount of oil accumulates in the upper cavity, the valve on the pipe connected to the water outlet can be closed. As the water level rises, the oil will gradually be discharged from the oil outlet until all the oil in the upper cavity is discharged. Then, the valve on the pipe at the water outlet can be opened.

[0009] When there are a lot of solid particles in the lower cavity, the water intake can be stopped and the slag outlet can be opened to discharge the solid particles from the lower cavity by gravity.

[0010] In the aforementioned oil-water separation device for industrial wastewater treatment, the pressure control valve includes a valve body disposed within the outlet connector, a valve core disposed within the valve body, and a spring. There is a flow gap between the valve body and the inner wall of the outlet connector. The valve core is spherical and is movable within the valve body. The outlet connector has an annular step. When the valve core presses against the annular step under the action of the spring, the outlet connector is in a closed state.

[0011] The spring force acting on the valve core is relative to the water pressure acting on the valve core. When the water pressure in the upper chamber is less than the spring force acting on the valve core, the outlet connector is closed. When the water pressure in the upper chamber is greater than the spring force acting on the valve core, the spring is compressed, the valve core disengages from the annular step, and the outlet connector is open, allowing water to flow out through the flow gap. When the water level in the upper chamber is 10cm higher than the outlet connector, the water pressure acting on the valve core equals the spring force acting on the valve core.

[0012] In the aforementioned oil-water separator for industrial wastewater treatment, the upper chamber is covered with a conical top cover, the inner diameter of which gradually decreases from bottom to top, and the oil outlet is located at the highest point of the top cover. The lower end of the top cover is sealed to the inner wall of the cylinder, and the conical top cover can collect oil, ensuring that the oil in the upper chamber is completely discharged during the oil discharge stage.

[0013] In the aforementioned oil-water separation device for industrial wastewater treatment, the cylinder is provided with a vertically extending water inlet channel that communicates with the lower cavity at its lower end. The top end of the water inlet channel is connected to a stirring chamber, and the water inlet connector is connected to the stirring chamber. Industrial wastewater enters the stirring chamber through the water inlet connector, and then enters the lower cavity through the vertically arranged water inlet channel, which intensifies the movement of the water and can separate the oil adhering to the solid waste particles.

[0014] In the aforementioned oil-water separation device for industrial wastewater treatment, the stirring chamber is equipped with stirring blades driven by a motor.

[0015] In the above-mentioned oil-water separation device for industrial wastewater treatment, the lower part of the cylinder is conical, and the inner diameter gradually decreases from top to bottom, and the slag outlet is located at the point where the inner diameter is the smallest.

[0016] In the aforementioned oil-water separation device for industrial wastewater treatment, the upper chamber is equipped with a horizontal baffle and a vertical baffle. The vertical baffle divides the upper chamber into an inlet chamber and an outlet chamber. The filter screen is located at the bottom of the inlet chamber, and the horizontal baffle is located at the bottom of the outlet chamber. The outlet connector communicates with the outlet chamber. The horizontal and vertical baffles prevent industrial wastewater that has just entered the lower chamber from flowing directly out of the outlet connector.

[0017] The working process of an oil-water separator for industrial wastewater treatment is as follows:

[0018] Close the slag outlet and continuously feed industrial wastewater into the mixing chamber through the inlet connector. After being stirred by the stirring blades, the wastewater enters the lower chamber vertically downward through the inlet channel. Solid particles are blocked in the lower chamber by the filter screen, while oil and water rise to the inlet chamber through the filter screen. The oil and water gradually separate into layers. When the liquid level in the inlet chamber is higher than the height of the vertical baffle, the oil and water enter the outlet chamber. When the water pressure in the outlet chamber reaches a level that can exceed the set pressure of the pressure control valve, the pressure control valve opens, and water flows out from the outlet connector.

[0019] When the pressure drops, the pressure control valve closes to prevent oil from flowing out of the water outlet.

[0020] When a large amount of oil accumulates in the upper cavity, the valve on the pipe connected to the water outlet can be closed. As the water level rises, the oil will gradually be discharged from the oil outlet until all the oil in the upper cavity is discharged. Then, the valve on the pipe at the water outlet can be opened.

[0021] When there are a lot of solid particles in the lower cavity, the water intake can be stopped and the slag outlet can be opened to discharge the solid particles from the lower cavity by gravity.

[0022] Compared with existing technologies, this oil-water separation device for industrial wastewater treatment has the following advantages: Because it is equipped with a pressure control valve, when the water pressure in the upper chamber reaches a level that can exceed the set pressure of the pressure control valve, the pressure control valve opens and water flows out from the outlet connector. When the pressure drops, the pressure control valve automatically closes to prevent oil from flowing out from the outlet connector. The horizontal and vertical baffles prevent industrial wastewater that has just entered the lower chamber from flowing directly out from the outlet connector. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an oil-water separation device for industrial wastewater treatment.

[0024] Figure 2 This is a schematic diagram of the pressure control valve in an oil-water separator.

[0025] In the diagram, 1. Cylinder; 2. Water inlet connector; 3. Water outlet connector; 4. Oil outlet; 5. Slag outlet; 6. Filter screen; 71. Valve body; 72. Valve core; 73. Spring; 74. Flow gap; 75. Annular step; 8. Top cover; 9. Water inlet channel; 10. Stirring chamber; 11. Stirring blades; 12. Horizontal baffle; 13. Vertical baffle. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] like Figure 1 The oil-water separation device for industrial wastewater treatment shown includes a cylinder 1 with an internal cavity, an inlet connector, an outlet connector 3, an oil outlet 4, and a slag outlet 5 provided on the cylinder 1. The lower part of the cylinder 1 is conical, and the inner diameter gradually decreases from top to bottom. The slag outlet 5 is located at the smallest inner diameter. A valve is provided at the slag outlet 5, which can be opened as needed.

[0028] like Figure 1 As shown, the cylinder 1 is equipped with a filter screen 6 to divide the cavity into an upper cavity and a lower cavity. The water inlet connector 2 is connected to the lower cavity, and the water outlet connector 3 is connected to the upper cavity. The upper part of the upper cavity is covered with a conical top cover 8. The inner diameter of the top cover 8 gradually decreases from bottom to top. The oil outlet 4 is located at the highest point of the top cover 8. The lower end of the top cover 8 is sealed to the inner wall of the cylinder 1. The conical top cover 8 can collect oil and ensure that the oil in the upper cavity is completely discharged during the oil discharge stage.

[0029] like Figure 1 As shown, the cylinder 1 has a water inlet channel 9 that extends vertically and is connected to the lower cavity at its lower end. The top end of the water inlet channel 9 is connected to a stirring chamber 10. The water inlet connector 2 is connected to the stirring chamber 10. The stirring chamber 10 is equipped with stirring blades 11 driven by a motor. Industrial wastewater enters the stirring chamber 10 through the water inlet connector 2, and then enters the lower cavity through the vertically arranged water inlet channel 9, which intensifies the movement of the water and can separate the oil adhering to the solid waste particles.

[0030] In this embodiment, a pressure control valve is provided at the water outlet connector 3. When the pressure control valve is opened, the water level in the upper cavity is higher than that at the water outlet connector 3.

[0031] like Figure 2As shown, the pressure control valve includes a valve body 71 disposed in the outlet connector 3, a valve core 72 disposed in the valve body 71, and a spring 73. There is a flow gap 74 between the valve body 71 and the inner wall of the outlet connector 3. The valve core 72 is spherical and is movable in the valve body 71. There is an annular step 75 in the outlet connector 3. When the valve core 72 is pressed against the annular step 75 under the action of the spring 73, the outlet connector 3 is in the closed state.

[0032] The elastic force of spring 73 acting on valve core 72 is relative to the pressure of water acting on valve core 72. When the water pressure in the upper cavity is less than the elastic force of spring 73 acting on valve core 72, the outlet connector 3 is in the closed state. When the water pressure in the upper cavity is greater than the elastic force of spring 73 acting on valve core 72, spring 73 is compressed, valve core 72 disengages from the annular step 75, and at this time, the outlet connector 3 is in the open state, and water can flow out through the flow gap 74. When the water level in the upper cavity is higher than the outlet connector 3 by 10 cm, the pressure of water acting on valve core 72 is equal to the elastic force of spring 73 acting on valve core 72.

[0033] like Figure 1 As shown, the upper cavity is provided with a horizontal baffle 12 and a vertical baffle 13. The vertical baffle 13 divides the upper cavity into an inlet cavity and an outlet cavity. The filter screen 6 is located at the bottom of the inlet cavity, and the horizontal baffle 12 is located at the bottom of the outlet cavity. The outlet connector 3 is connected to the outlet cavity, which can prevent the industrial wastewater that has just entered the lower cavity from flowing directly out of the outlet connector 3.

[0034] The working process of an oil-water separator for industrial wastewater treatment is as follows:

[0035] Close the slag outlet 5 and continuously send industrial wastewater into the mixing chamber 10 through the water inlet connector 2. After being stirred by the stirring blades 11, the wastewater enters the lower chamber vertically downward through the water inlet channel 9. Solid particles are blocked in the lower chamber by the filter screen 6, while oil and water rise to the water inlet chamber through the filter screen 6. The oil and water gradually separate into layers. When the liquid level in the water inlet chamber is higher than the height of the vertical baffle 13, the oil and water enter the water outlet chamber. When the water pressure in the water outlet chamber reaches the set pressure that can exceed the pressure control valve, the pressure control valve opens, and water flows out from the water outlet connector 3.

[0036] When the pressure drops, the pressure control valve closes to prevent oil from flowing out of the water outlet connector 3.

[0037] When a large amount of oil accumulates in the upper cavity, the valve on the pipe connected to the water outlet connector 3 can be closed. As the water level rises, the oil will gradually be discharged from the oil outlet 4 until all the oil in the upper cavity is discharged. Then, the valve on the pipe at the water outlet connector 3 can be opened.

[0038] When there are a lot of solid particles in the lower cavity, the water intake can be stopped and the slag outlet 5 can be opened to discharge the solid particles in the lower cavity by gravity.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An oil-water separation device for industrial wastewater treatment, characterized in that, The device includes a cylindrical body (1) with an internal cavity, a water inlet connector (2), a water outlet connector (3), an oil outlet (4), and a slag outlet (5) located on the cylindrical body (1). The cylindrical body (1) is provided with a filter screen (6) for dividing the cavity into an upper cavity and a lower cavity. The water inlet connector (2) is connected to the lower cavity. The slag outlet (5) is located at the bottom of the lower cavity. The oil outlet (4) is located at the top of the upper cavity. The water outlet connector (3) is connected to the upper cavity. A pressure control valve is provided at the water outlet connector (3). When the pressure control valve is opened, the water level in the upper cavity is higher than that at the water outlet connector (3).

2. The oil-water separation device for industrial wastewater treatment according to claim 1, characterized in that, The pressure control valve includes a valve body (71) disposed in the outlet connector (3), a valve core (72) disposed in the valve body (71), and a spring (73). There is a flow gap (74) between the valve body (71) and the inner wall of the outlet connector (3). The valve core (72) is spherical and is movable in the valve body (71). The outlet connector (3) has an annular step (75). When the valve core (72) abuts against the annular step (75) under the action of the spring (73), the outlet connector (3) is in a closed state.

3. The oil-water separation device for industrial wastewater treatment according to claim 1, characterized in that, The upper part of the upper cavity is covered with a conical top cover (8), the inner diameter of which gradually decreases from bottom to top, and the oil outlet (4) is located at the highest point of the top cover (8).

4. The oil-water separation device for industrial wastewater treatment according to claim 1, characterized in that, The cylinder (1) is provided with a water inlet channel (9) that is connected to the lower cavity and extends vertically. The top end of the water inlet channel (9) is connected to a stirring chamber (10), and the water inlet connector (2) is connected to the stirring chamber (10).

5. The oil-water separation device for industrial wastewater treatment according to claim 4, characterized in that, The stirring chamber (10) is equipped with stirring blades (11) driven by a motor.

6. The oil-water separation device for industrial wastewater treatment according to claim 1, characterized in that, The lower part of the cylinder (1) is conical, and the inner diameter gradually decreases from top to bottom. The slag outlet (5) is located at the point where the inner diameter is the smallest.

7. The oil-water separation device for industrial wastewater treatment according to claim 1, characterized in that, The upper cavity is provided with a horizontal baffle (12) and a vertical baffle (13). The vertical baffle (13) divides the upper cavity into an inlet cavity and an outlet cavity. The filter screen (6) is located at the bottom of the inlet cavity. The horizontal baffle (12) is located at the bottom of the outlet cavity. The outlet connector (3) is connected to the outlet cavity.

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