A sewage treatment process oil-water separation device

Abstract

The utility model discloses a kind of oil-water separation devices in sewage treatment process, it is related to sewage treatment equipment technical field, including multistage separation module, intelligent control unit, backwashing component, data storage module and display module;Multistage separation module is along sewage flow direction and is equipped with coarse filter screen, inclined plate settling bin and fine filter component in turn, remove different particle size impurities and oil droplet by "coarse filter-inclined plate settling-fine filter" three-level structure;Intelligent control unit is with controller as core, connect oil separation concentration sensor, flow regulating valve and liquid level sensor, can be adjusted according to effluent oil separation concentration real-time water inflow velocity, realize liquid level early warning, automatic sludge discharge and automatic backwashing;Backwashing component regularly cleans coarse filter screen, and data storage and display module realize the storage and monitoring of operating data.The device separation efficiency and automation degree are high, maintenance is convenient and function is perfect, can effectively guarantee oil-water separation effect in sewage treatment process, applicable to industrial and domestic sewage treatment scene.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment technology, and more specifically to an oil-water separation device for sewage treatment process. Background Technology

[0002] Large amounts of oily wastewater are generated during production processes in industries such as petrochemicals, machinery manufacturing, and food processing, as well as in daily life settings such as catering services. Direct discharge of this wastewater can severely damage aquatic ecosystems and wastewater treatment systems. Therefore, oil-water separation is a crucial step in wastewater treatment.

[0003] Existing oil-water separation devices mostly employ gravity separation principles, such as oil separators and inclined plate sedimentation tanks. However, these traditional devices have the following shortcomings: 1. Separation efficiency is greatly affected by fluctuations in influent flow rate and water quality, resulting in unstable treatment effects. When the oil content in the influent suddenly increases, it can easily lead to the effluent exceeding the standards; 2. They largely rely on manual monitoring and operation, such as adjusting valves, cleaning filters, and discharging sludge based on experience, resulting in low automation and high labor intensity; 3. Filters and sedimentation units are prone to clogging, requiring frequent maintenance. Traditional maintenance methods are time-consuming and labor-intensive, affecting the continuous operation of the equipment.

[0004] Therefore, there is an urgent need for an oil-water separation device that can automatically adapt to changes in water quality, intelligently regulate and be easy to maintain, in order to improve the stability and reliability of the treatment effect and reduce operating costs. Utility Model Content

[0005] The purpose of this utility model is to solve the technical problems of low separation efficiency, low degree of automation, inconvenient maintenance and imperfect functions of existing devices. This utility model provides an oil-water separation device for sewage treatment.

[0006] The technical solution adopted by this utility model is as follows: an oil-water separation device for wastewater treatment, comprising: A multi-stage separation module includes a coarse filter screen and an inclined plate sedimentation chamber connected sequentially along the sewage flow direction. The inclined plate sedimentation chamber is equipped with an oil discharge pipe at the top and a sludge discharge valve at the bottom. The intelligent control unit includes an oil concentration sensor located at the outlet of the device, a flow regulating valve located at the inlet of the device, and a controller connected to the oil concentration sensor and the flow regulating valve. The controller is configured to reduce the opening of the flow regulating valve to decrease the inlet water flow when the signal value detected by the oil concentration sensor exceeds a preset threshold.

[0007] Preferably, the coarse filter screen has a detachable structure.

[0008] Preferably, the inclined plate settling chamber is equipped with an inclined plate.

[0009] Preferably, the multi-stage separation module further includes a fine filtration component, which is disposed at the outlet end of the inclined plate sedimentation tank.

[0010] Preferably, the fine filtration assembly adopts a quick-release structure.

[0011] Preferably, the intelligent control unit further includes a liquid level sensor, and the controller is further configured to trigger an early warning based on the signal from the liquid level sensor.

[0012] Preferably, the system further includes a data storage module and a display module connected to the controller.

[0013] Preferably, it further includes a backflushing assembly, which includes a backflushing line and a backflushing valve connected to a controller; the controller is configured to automatically control the opening and closing of the backflushing valve.

[0014] Preferably, the sludge discharge valve is connected to the controller and is automatically controlled by the controller.

[0015] Preferably, the controller is configured to automatically control the opening degree of the flow regulating valve.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. High separation efficiency: Through a three-stage separation structure of "coarse filtration - inclined plate sedimentation - fine filtration", large particulate impurities, floating oil and tiny oil droplets are removed in sequence to ensure that the oil concentration of the effluent meets the standards. 2. High degree of automation: The PLC controller adjusts the inlet water flow rate in real time according to the oil concentration, automatically completes sludge discharge and backwashing, without manual intervention, reducing the intensity of operation and improving control accuracy; 3. Easy maintenance: The coarse filter screen adopts a detachable insert structure, and the membrane housing of the fine filter module has a quick-release structure, which is convenient for cleaning and replacement; the backwashing module can clean the filter screen regularly, extend its service life, and reduce downtime for maintenance. 4. Comprehensive functions: It has a liquid level warning function to prevent sewage overflow; data storage and display functions facilitate equipment status monitoring, fault tracing and operation data analysis, and improve equipment reliability. Attached Figure Description

[0017] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model (AA). The markings in the diagram are as follows: 1-coarse filter screen, 2-sloping plate settling chamber, 3-oil concentration sensor, 4-flow regulating valve, 5-controller, 6-fine filter assembly, 7-liquid level sensor, 8-backwash water pipe, 9-backwash valve, 10-sludge discharge valve, 11-backwash sludge discharge valve, 12-inlet water pipe, 13-oil discharge pipe, 14-outlet water pipe, 15-sloping plate, 16-oil discharge valve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] In one embodiment of this utility model, such as Figure 1-2 As shown in the figure, this embodiment provides an oil-water separation device for wastewater treatment, including a multi-stage separation module and an intelligent control unit.

[0021] The multi-stage separation module includes a coarse filter screen 1 and an inclined plate sedimentation chamber 2 connected sequentially along the sewage flow direction via an inlet pipe 12. The coarse filter screen 1 is located at the inlet end of the inlet pipe 12 of the device and is used to intercept large suspended particles. The inclined plate sedimentation chamber 2 is equipped with several parallel inclined plates 15, which utilize the principle of shallow pool to increase the sedimentation area and improve the oil-water separation efficiency. The top side of the inclined plate sedimentation chamber 2 is equipped with an oil drain pipe 13 with an oil drain valve 16 for collecting and discharging the separated floating oil. Its bottom is conical to facilitate sludge accumulation, and a sludge discharge valve 10 is provided at the lowest point for periodic sludge discharge.

[0022] The intelligent control unit includes an oil concentration sensor 3, a flow regulating valve 4, and a controller 5, preferably a PLC controller. The oil concentration sensor 3 is installed at the outlet pipe 14 of the device to detect the oil concentration of the final effluent in real time. The flow regulating valve 4 is installed on the inlet pipe 12. The controller 5 is electrically connected to the oil concentration sensor 3 and the flow regulating valve 4, respectively. The controller 5 is configured to: receive the effluent oil concentration signal detected by the oil concentration sensor 3; when the signal value exceeds a preset threshold, determine that the current processing load is too high; and immediately control the flow regulating valve 4 to reduce the opening to reduce the inlet flow rate, thereby extending the residence time of the wastewater in the separation module, ensuring sufficient oil-water separation, and restoring the effluent water quality to the required standard.

[0023] In another embodiment of this utility model, the coarse filter 1 has a pore size of 1-2 mm and is a detachable insert structure, which facilitates cleaning or replacement after clogging.

[0024] In another embodiment of this utility model, the inclination angle of the inclined plate 15 in the inclined plate settling chamber 2 is 45-60°, and the distance between adjacent inclined plates 15 is 30-50mm. This parameter range can take into account both excellent separation effect and anti-clogging ability.

[0025] In another embodiment of this utility model, the multi-stage separation module further includes a fine filtration component 6, which is disposed between the outlet end of the inclined plate sedimentation tank 2 and the outlet pipe 14 of the device. The fine filtration component 6 adopts a polymer retention membrane with a pore size of 0.1-0.5μm for deep treatment to remove fine dispersed oil and emulsified oil, ensuring extremely high quality of the effluent.

[0026] In another embodiment of this utility model, the membrane housing of the fine filtration component 6 adopts a quick-release structure, including a clamp and a sealing ring, which makes the operation of replacing or cleaning the filter membrane very simple and quick.

[0027] In another embodiment of this utility model, the intelligent control unit further includes a liquid level sensor 7 disposed in the inclined plate settling tank 2, and the liquid level sensor 7 is electrically connected to the PLC controller 5. The controller 5 is further configured to: determine the liquid level in the inclined plate settling tank 2 based on the signal from the liquid level sensor 7, and trigger an early warning when the liquid level is too high or too low to prevent overflow or pump dry running and protect the safe operation of the equipment.

[0028] In another embodiment of this utility model, a data storage module and a display module connected to the controller 5 are also included, which are used to store and display data such as oil concentration, water flow rate, liquid level in the tank and equipment running time in real time, so as to facilitate process monitoring and historical data traceability.

[0029] In another embodiment of this utility model, a backwashing assembly is also included, comprising a backwashing water pipe 8 and a backwashing valve 9. The outlet of the backwashing water pipe 8 is aligned with the inlet side of the coarse filter screen 1. A backwash sludge discharge valve 11 is provided between the coarse filter screen 1 and the flow regulating valve 4. Both the backwashing valve 9 and the backwash sludge discharge valve 11 are electrically connected to the controller 5, and are opened and closed by the controller 5 according to a preset program or time cycle, realizing automatic backwashing of the coarse filter screen 1, flushing out the intercepted debris and discharging it from the backwash sludge discharge valve 11, greatly reducing the workload of maintenance.

[0030] In another embodiment of this utility model, the sludge discharge valve 10 at the bottom of the inclined plate settling chamber 2 is electrically connected to the controller 5, and the controller 5 controls the opening and closing according to a preset cycle to realize timed automatic sludge discharge and avoid sludge accumulation affecting the separation effect.

[0031] In another embodiment of this utility model, the flow regulating valve 4 is an electric proportional regulating valve, and the controller 5 controls the opening of the electric proportional regulating valve by outputting a PWM signal to achieve precise and stepless adjustment of the inlet flow rate, resulting in smoother and more accurate control.

[0032] The working process of this utility model is as follows: Oil-water separation process: Wastewater enters through inlet pipe 12 and first passes through coarse filter screen 1 to filter large particles of impurities; then it enters inclined plate sedimentation chamber 2, where oil droplets float to the top along inclined plate 15 and are discharged through oil drain pipe 13; sludge sinks to the bottom conical area, and PLC controller 5 controls sludge discharge valve 10 to open for 5 minutes every 2 hours to discharge sludge; the wastewater after sedimentation enters fine filter component 6, where tiny oil droplets are intercepted by polymer interception membrane, and finally the purified wastewater is discharged through outlet pipe 14.

[0033] Intelligent control process: Oil concentration sensor 3 detects the oil concentration in the outlet pipe 14 in real time. When the concentration is >5mg / L, PLC controller 5 outputs a PWM signal to reduce the opening of flow regulating valve 4 (e.g., from 80% to 50%), thus reducing the inlet water flow rate. When the concentration is ≤5mg / L, the flow regulating valve 4 is restored to its normal opening. Liquid level sensor 7 detects the liquid level in inclined plate sedimentation tank 2. When the liquid level is >the preset upper limit, PLC controller 5 triggers the alarm light to illuminate.

[0034] Backwashing process: PLC controller 5 controls backwash valve 9 to open for 3 minutes every 8 hours, and at the same time opens backwash sludge discharge valve 11. Backwash water pipe 8 sprays high-pressure water to wash coarse filter screen 1. The washed impurities are discharged with the sewage through backwash sludge discharge valve 11. After washing is completed, backwash valve 9 and backwash sludge discharge valve 11 are closed.

[0035] Data monitoring process: The data storage module stores oil concentration, influent flow rate, liquid level and running time data in real time; the display module displays the above parameters in real time. Operators can view the equipment operating status through the touch screen. If historical data needs to be traced, it can be exported and analyzed through the data storage module.

[0036] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. An oil-water separation device for wastewater treatment, characterized in that, include: The multi-stage separation module includes a coarse filter screen (1) and an inclined plate settling chamber (2) connected sequentially along the sewage flow direction. The inclined plate settling chamber (2) is provided with an oil drain pipe (13) at the top and a sludge drain valve (10) at the bottom. The intelligent control unit includes an oil concentration sensor (3) located at the outlet of the device, a flow regulating valve (4) located at the inlet of the device, and a controller (5) connected to the oil concentration sensor (3) and the flow regulating valve (4); The controller (5) is configured to control the flow regulating valve (4) to reduce the opening degree to reduce the inlet water flow when the signal value detected by the oil concentration sensor (3) exceeds a preset threshold.

2. The oil-water separation device for wastewater treatment according to claim 1, characterized in that, The coarse filter (1) is a detachable structure.

3. The oil-water separation device for wastewater treatment according to claim 1, characterized in that, The inclined plate settling chamber (2) is equipped with an inclined plate (15).

4. The oil-water separation device for wastewater treatment according to claim 1, characterized in that, The multi-stage separation module also includes a fine filtration component (6), which is located at the outlet end of the inclined plate sedimentation tank (2).

5. The oil-water separation device for wastewater treatment according to claim 4, characterized in that, The fine filter assembly (6) adopts a quick-release structure.

6. The oil-water separation device for wastewater treatment according to claim 1, characterized in that, The intelligent control unit also includes a liquid level sensor (7), and the controller (5) is further configured to trigger an early warning based on the signal from the liquid level sensor (7).

7. The oil-water separation device for wastewater treatment according to claim 1, characterized in that, It also includes a data storage module and a display module connected to the controller (5).

8. The oil-water separation device for wastewater treatment according to claim 1, characterized in that, It also includes a backwashing assembly; the backwashing assembly includes a backwashing pipeline and a backwashing valve (9), and the backwashing valve (9) is connected to a controller (5); the controller (5) is configured to automatically control the opening and closing of the backwashing valve (9).

9. The oil-water separation device for wastewater treatment according to claim 1, characterized in that, The mud discharge valve (10) is connected to the controller (5) and is automatically controlled by the controller (5).

10. The oil-water separation device for wastewater treatment according to claim 1, characterized in that, The controller (5) is configured to automatically control the opening degree of the flow regulating valve (4).

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