Energy-saving oil-water separation device

Abstract

The utility model discloses an energy-saving oil-water separation device which comprises a main box body, two end parts of the main box body are respectively provided with a water inlet and a water outlet, a water distribution tank is arranged in the main box body, a filter screen is arranged in the water distribution tank, the water inlet is communicated with the water distribution tank and the filter screen, and an oil-water separation box is arranged below the filter screen. An oil-water separation box is arranged in the main box body, an automatic oil scraping mechanism is arranged at the top in the oil-water separation box, an oil skimming groove is formed in one side of the automatic oil scraping mechanism, an oil outlet is formed in the main box body, the oil outlet is communicated with the oil skimming groove, and a plurality of slag discharging openings are formed in the bottom of the oil-water separation box. Unmanned operation of equipment can be realized; a water inlet flow meter is adopted to be linked with all mechanical parts, so that dry burning or idling of equipment is prevented; the oil-containing wastewater is treated, the oil content of the treated effluent is lower than 200mg / L, and the water content of the produced grease is as low as 5%.

Description

Technical Field

[0001] This utility model relates to the field of wastewater pretreatment technology, specifically to an energy-saving oil-water separation device. Background Technology

[0002] Municipal wastewater treatment is a crucial part of the urbanization process, in which oil-water separation devices play a key role. With the accelerating pace of urbanization, the oil content in wastewater from catering, industry, and other sectors is increasing, placing higher demands on oil-water separation technology.

[0003] In terms of technical background, municipal wastewater oil-water separation devices mainly employ methods such as gravity separation, centrifugal separation, and cyclone separation. These devices can effectively separate oil from wastewater, reducing water pollution. For example, the Monk brand oil-water separator uses eddy current sedimentation separation, utilizing the centrifugal force generated by the different specific gravities of oil, water, and sludge in catering wastewater to achieve rapid and efficient separation.

[0004] However, existing municipal wastewater oil-water separation devices still have some problems. First, their processing capacity is limited, making it difficult to meet the treatment needs of large volumes of wastewater. Second, the separation effect of some devices is unstable, especially when treating complex wastewater, where the separation of grease and suspended solids is difficult to meet standards. In addition, high operating costs and difficult maintenance also limit the widespread application of oil-water separation devices.

[0005] To address these issues, municipal wastewater oil-water separation devices need further design optimization to improve separation efficiency, reduce operating costs, and simplify maintenance procedures, in order to meet the ever-increasing demand for wastewater treatment. Therefore, this application proposes an energy-saving oil-water separation device that can achieve efficient and low-consumption treatment of oily wastewater and maximize grease recovery. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide an energy-saving oil-water separation device, which can be used to separate oil and water to effectively treat municipal sewage, thereby achieving the purpose of environmental management and pollution reduction.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] An energy-saving oil-water separation device includes a main body with an inlet and an outlet at each end. A water distribution trough is installed inside the main body, and a filter screen is installed within the trough. The inlet is connected to the water distribution trough and the filter screen. Below the filter screen is an oil-water separation tank. An automatic oil skimming mechanism is installed at the top of the oil-water separation tank, and an oil skimming trough is provided on one side of the automatic oil skimming mechanism. An oil outlet is opened on the main body, communicating with the oil skimming trough. Several slag discharge ports are provided at the bottom of the oil-water separation tank.

[0009] Furthermore, the automatic oil scraping mechanism includes a chain, a set of oil scraping blades, a motor, a main sprocket, and a driven sprocket. The main sprocket is mounted on the output shaft of the motor. The driving sprocket and the driven sprocket are connected by a chain. The chain is provided with oil scraping blades at even intervals, and the rotation speed of the oil scraping blades is 0.5-2 minutes per revolution.

[0010] Furthermore, several electric heaters are installed at the bottom of the oil-water separator, and temperature sensors are installed at the four corners of each heater.

[0011] Furthermore, the main housing is supported by four support legs, and the main housing is provided with an insulation layer on all four sides, the insulation layer being at least 5cm thick; an electrical control box is provided on the main housing.

[0012] Furthermore, a backwash water pump is installed inside the oil-water separator. The inlet of the backwash water pump is connected to the oil-water separator, and a spray pipe is provided at its outlet, extending to the filter screen.

[0013] Furthermore, the water distribution trough and the filter screen are integrated; the depth of the water distribution trough is 3-5cm lower than that of the filter screen.

[0014] Furthermore, the water inlet is a flange interface and is equipped with an electromagnetic flow meter, and an electric valve is installed at the oil outlet. The temperature sensor, electric valve, electromagnetic flow meter, electric heater, backwash pump and motor are all electrically connected to the PLC system in the electrical control box.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1) This utility model device adopts automatic oil scraping and automatic valve control for automatic oil discharge, which can realize unmanned operation of the equipment; and uses an inlet flow meter to link all mechanical components to prevent the equipment from dry burning or running dry; it treats oily wastewater, and the oil content of the treated effluent is less than 200mg / L, and the water content of the produced oil is less than 5%;

[0017] 2) This utility model energy-saving oil-water separation device uses a backwash water pump to extract heated sewage to rinse the filter screen, which can effectively prevent garbage from clogging the filter screen holes; at the same time, the water distribution tank is designed to be 3-5 cm deeper than the filter screen. When garbage accumulates and causes poor drainage of the filter screen, the backwash water will flush the garbage into the water distribution tank and then accumulate it, which can effectively delay the clogging of the filter screen.

[0018] 3) The heating system of this energy-saving oil-water separator adopts PLC-controlled pulse heating to prevent local overheating or uneven heating, which can effectively reduce the energy consumption of the equipment and improve the oil output efficiency. Attached Figure Description

[0019] Figure 1 This is a front view of the device of this utility model;

[0020] Figure 2 This is a top view of the device of this utility model.

[0021] In the diagram: 1. Main tank; 2. Backwash water pump; 3. Filter screen; 4. Electric heater; 5. Chain; 6. Oil outlet; 7. Insulation layer; 8. Water inlet; 9. Slag outlet; 10. Skimming trough; 11. Oil scraper; 12. Support leg; 13. Water outlet; 14. Temperature sensor; 15. Electrical control box; 16. Water distribution trough; 17. Oil-water separator tank; 18. Electric valve; 19. Electromagnetic flow meter; 20. Spray pipe. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the scope described herein.

[0023] Please refer to Figure 1-2 An energy-saving oil-water separation device is disclosed. In this embodiment, the device has a processing capacity of 5 tons / hour and dimensions of 1.6m × 0.8m × 1.0m (length × width × height). The device includes a main housing 1, the top of which is composed of a movable cover plate equipped with a handle for easy opening. All four sides of the main housing 1 are provided with an insulation layer 7, which is made of rubber-plastic sponge and is 5 cm thick.

[0024] The main body 1 is provided with an inlet 8 and an outlet 13 at both ends. The main body 1 is supported by four support legs 12. The inlet 8 is a flange interface with a diameter of DN150 and is equipped with an electromagnetic flow meter 19, which can monitor the inlet flow rate in real time.

[0025] The main body 1 is equipped with a water distribution trough 16, and a filter screen 3 is installed inside the water distribution trough 16. The water inlet 8 is connected to the water distribution trough 16 and the filter screen 3. Below the filter screen 3 is an oil-water separation tank 17, and an automatic oil skimming mechanism is installed at the top of the oil-water separation tank 17. An oil skimming trough 10 is provided on one side of the automatic oil skimming mechanism. An oil outlet 6 is provided on the main body 1, and the oil outlet 6 is connected to the oil skimming trough 10. Several slag discharge ports 9 are provided at the bottom of the oil-water separation tank 17.

[0026] In this embodiment, there are 2 slag discharge ports (9 in total) for emptying the oil-water separator 17 when needed.

[0027] The oil-water separator 17 has a volume that meets the hydraulic retention time of 10 minutes. The effective volume of the oil-water separator 17 is 0.35 cubic meters. The oil-water separator 17 is equipped with 4 electric heaters 4, each with a power of 1.5KW. Temperature sensors 14 are installed at the four corners of the tank.

[0028] The automatic oil scraping mechanism includes a chain 5, a set of oil scraper blades 11, a motor, a main sprocket, and a driven sprocket. The main sprocket is mounted on the output shaft of the motor. The driving sprocket and the driven sprocket are connected by the chain 5. The chain 5 is evenly spaced with oil scrapers 11. The rotation speed of the oil scraper blades 11 is 0.5-2 minutes / revolution. The chain 5 is made of stainless steel or nylon, and the oil scraper blades 11 are made of high-quality rubber.

[0029] The scraper blade 11 scrapes the grease to the skimming trough 10, and the grease is finally discharged through the oil outlet 6. An electric valve 18 is installed at the oil outlet 6, and the oil outlet 6 is controlled by the electric valve to achieve timed discharge.

[0030] Oil scraping process:

[0031] The motor drives the chain through the sprocket. The oil scraper 11 is fixed on the chain. When the motor rotates, it drives the oil scraper 11 to rotate. When the oil scraper 11 moves to the water surface, it comes into contact with the sewage and pushes the oil on the surface of the sewage to the oil skimming trough 10, thereby realizing the oil scraping function.

[0032] A backwash water pump 2 is installed inside the oil-water separator 17. The inlet of the backwash water pump 2 is connected to the oil-water separator 17, and a spray pipe 20 is provided at its outlet, extending to the filter screen 3. The backwash water pump 2 draws heated water and sprays it into the filter screen 3 through the spray pipe 20 to rinse the filter screen 3 and prevent solids from clogging the filter screen.

[0033] The inlet 8 is connected to the water distribution trough 16 and the filter screen 3. The water distribution trough 16 and the filter screen 3 are integrated as a single unit, with the depth of the water distribution trough 16 being 3-5 cm lower than that of the filter screen 3. The connection between the inlet 8 and the water distribution trough 16 is a flexible connection, which facilitates separation and ensures airtightness. A flexible connection is a pipe fitting used to connect liquid pipelines, also known as a soft joint or flexible connection. Its main function is to compensate for displacement and stress caused by equipment or pipeline vibration and to transport liquids. According to the connection method, it can be divided into loose flange type, fixed flange type, and threaded type. In this embodiment, it is a fixed flange type.

[0034] The main housing 1 is equipped with an electrical control box 15. An electric valve 18 is installed at the oil outlet 6. The temperature sensor 14, electric valve 18, electromagnetic flow meter 19, electric heater 4, return water washing pump 2 and motor are all electrically connected to the PLC system in the electrical control box 15.

[0035] The electrical control box 15 supplies power to all electrical equipment and realizes automatic control through the PLC system; the temperature sensor 14 can collect the temperature of each corner in the water tank and transmit it to the PLC system in the electrical control box 15.

[0036] When the electromagnetic flowmeter 19 detects that oily wastewater has entered the device, the PLC system will automatically control all components to operate automatically, and the water temperature in the oil-water separator 17 will be controlled at 50±5℃.

[0037] The PLC system controls the output of electric heater 4 in pulse mode, that is, heating for n seconds and stopping for m seconds.

[0038] When the water temperature reaches 50℃, it will automatically heat for 1 second and stop for 2 seconds; when the water temperature exceeds 60℃, it will stop heating; when the temperature difference between any two temperature sensors exceeds 5 degrees Celsius, it will immediately switch to full power output mode, i.e., non-stop heating mode.

[0039] After being processed by this energy-saving oil-water separator, the oil content of the effluent is less than 200 mg / L, and the water content of the produced oil is less than 5%.

Claims

1. An energy-saving oil-water separation device, comprising a main housing (1), wherein the main housing (1) is provided with an inlet (8) and an outlet (13) at both ends, a water distribution trough (16) is installed inside the main housing (1), a filter screen (3) is provided inside the water distribution trough (16), the inlet (8) is connected to the water distribution trough (16) and the filter screen (3), and an oil-water separation tank (17) is located below the filter screen (3), characterized in that... An automatic oil scraping mechanism is installed on the top of the oil-water separator (17). An oil skimming trough (10) is provided on one side of the automatic oil scraping mechanism. An oil outlet (6) is provided on the main body (1). The oil outlet (6) is connected to the oil skimming trough (10). Several slag discharge ports (9) are provided at the bottom of the oil-water separator (17).

2. The energy-saving oil-water separator according to claim 1, characterized in that... The automatic oil scraping mechanism includes a chain (5), a set of oil scraping plates (11), a motor, a main sprocket and a driven sprocket. The main sprocket is installed on the output shaft of the motor. The driven sprocket and the driven sprocket are connected by the chain (5). The oil scraping plates (11) are evenly spaced on the chain (5). The rotation speed of the oil scraping plates (11) is 0.5-2 minutes / revolution.

3. The energy-saving oil-water separator according to claim 2, characterized in that... Several electric heaters (4) are installed at the bottom of the oil-water separator (17), and temperature sensors (14) are installed at the four corners of the separator.

4. An energy-saving oil-water separator according to claim 3, characterized in that... The main body (1) is supported by four support legs (12). The main body (1) is provided with insulation layer (7) on all four sides. The insulation layer (7) is at least 5cm thick. The main body (1) is provided with an electrical control box (15).

5. An energy-saving oil-water separator according to claim 4, characterized in that... The oil-water separator (17) is equipped with a backwash water pump (2). The inlet of the backwash water pump (2) is connected to the oil-water separator (17), and a spray pipe (20) is provided at its outlet. The spray pipe (20) extends to the filter screen (3).

6. An energy-saving oil-water separator according to claim 1, characterized in that... The water distribution trough (16) and the filter screen (3) are integrated; the depth of the water distribution trough (16) is 3-5cm lower than that of the filter screen (3).

7. An energy-saving oil-water separator according to claim 4, characterized in that... The inlet (8) is a flange interface and is equipped with an electromagnetic flow meter (19). An electric valve (18) is installed at the oil outlet (6). The temperature sensor (14), electric valve (18), electromagnetic flow meter (19), electric heater (4), backwash pump (2) and motor are all electrically connected to the PLC system in the electrical control box (15).

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