Oil separation treatment equipment control system and control method
By using a dual-system control approach with one active and one backup system, combined with a PLC controller and various control methods, the problems of clogging and high failure rate of the sealed oil separation device were solved, achieving efficient, automated, and unattended operation of the equipment.
Patent Information
- Application Number
- CN202511123173.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-12
- Publication Date
- 2025-11-28
Smart Images
Figure CN121028879A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of oil separation treatment, in particular to an oil separation treatment equipment control system and a control method. BACKGROUND
[0002] At present, the existing closed oil separation treatment device is applied to villas underground kitchens, chain restaurants, supermarket cleaning tables, small canteens and subway commercial spaces.
[0003] The traditional buried type restaurant oil-water separator is generally installed in a pit, and the maintenance personnel stand on the top of the equipment to open the maintenance cover, and use the manual basket grid to remove the solid impurities and separated oil, which needs to invest a large amount of manpower to maintain, and the operation is inconvenient, the safety cannot be guaranteed, and the control system is mostly liquid level control, which controls the start and stop of the water pump according to the liquid level detection unit in the box, and relies on the water pump to drive the self reamer to intercept and crush the solid pollutants. Since the restaurant wastewater contains oil with certain viscosity, the basket grid screen is blocked, and the blocked solid pollutants will also be calcified to block the water pump.
[0004] Then, a spiral conveyor is added at the front end to achieve the purpose of deslagging, but the spiral conveyor is generally made of a screen plate with a mesh diameter of 5mm. After the equipment runs for a period of time, the mesh hole of the screen plate will be blocked by the filtered solid pollutants, and the screen plate needs to be regularly disassembled and cleaned. After improvement, the spiral conveyor is mostly time-controlled intermittent operation, and the water pump is mostly liquid level-controlled. The disadvantages of the above control system are that: The spiral conveyor is generally time-controlled intermittent operation, and since the sewage quantity is different during the day and at night, the working efficiency is low, the energy consumption is large, and the service life of the equipment cannot be guaranteed; Since the restaurant wastewater contains oil with certain viscosity, the blocked solid pollutants will also be calcified, and the spiral conveyor screen plate is easily blocked. The deslagging effect is very small, and in serious cases, it will cause blockage, spiral conveyor failure and stop, and further cause the water inlet of the equipment to be blocked and the wastewater to be unable to enter the treatment equipment through the water inlet; The equipment has a high failure rate, is inconvenient to maintain, causes secondary pollution due to overflow of the blocked water inlet, has a high maintenance cost, and has low timeliness in fault handling; The overall automation level of the equipment is not high, and cannot reach the level of automation and unattended, When a single component in the equipment fails, the overall equipment cannot normally operate. SUMMARY
[0005] In view of the problems in the prior art, the present application provides an oil separation treatment equipment control system and a control method, which can realize reasonable rotation of two sets of systems by combining multiple control modes. To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: This invention proposes a control system for an oil separation treatment device, including a water inlet unit, a first housing, a second housing, and an electrical control cabinet. The water inlet unit includes a first water inlet pipe and a second water inlet pipe, which are respectively connected to the inlets at the front ends of the first housing and the second housing. The first water inlet pipe is equipped with a first electric water inlet valve, and the second water inlet pipe is equipped with a second electric water inlet valve. The first chamber contains, from front to back, a first slag removal chamber, a first oil-water separation chamber, and a first sewage lifting chamber. The first inlet pipe is connected to the inlet of the first slag removal chamber. The upper part of the first slag removal chamber and the first oil-water separation chamber are separated by a vertical partition. The first slag removal chamber is equipped with a first slag removal machine. The lower part of the first slag removal chamber is connected to the first oil-water separation chamber. The upper part of the first oil-water separation chamber and the first sewage lifting chamber are separated by a vertical partition. The upper part of the first oil-water separation chamber is equipped with a first oil removal machine. The first oil removal machine is equipped with a first heater and a first temperature sensor. The lower part of the first oil-water separation chamber is connected to the first sewage lifting chamber. The first sewage lifting chamber is equipped with a first float level switch. The rear part of the first sewage lifting chamber is equipped with a first drainage pipe and a second drainage pipe. The first drainage pipe is equipped with a first sewage pump and a first check valve in sequence along the water outlet direction. The second drainage pipe is equipped with a second sewage pump and a second check valve in sequence along the water outlet direction. The first drainage pipe and the second drainage pipe converge to the main water outlet pipe. The second chamber contains, from front to back, a second slag removal chamber, a second oil-water separation chamber, and a second sewage lifting chamber. The second water inlet pipe is connected to the inlet of the second slag removal chamber. The upper part of the second slag removal chamber is separated from the second oil-water separation chamber by a vertical partition. The second slag removal chamber is equipped with a second slag removal machine. The lower part of the second slag removal chamber is connected to the second oil-water separation chamber. The upper part of the second oil-water separation chamber is separated from the second sewage lifting chamber by a vertical partition. The upper part of the second oil-water separation chamber is equipped with a second oil removal machine, which is equipped with a second heater and a second temperature sensor. The lower part of the second oil-water separation chamber is connected to the second sewage lifting chamber. The second sewage lifting chamber is equipped with a second float level switch. The rear part of the second sewage lifting chamber is equipped with a third drainage pipe and a fourth drainage pipe. The third drainage pipe is equipped with a third sewage pump and a third check valve in sequence along the water outlet direction. The fourth drainage pipe is equipped with a fourth sewage pump and a fourth check valve in sequence along the water outlet direction. The third and fourth drainage pipes converge into the main water outlet pipe. The rear ends of the first sewage lifting chamber and the second sewage lifting chamber are connected by an intermediate pipeline, which is equipped with a connecting electric valve. The first inlet electric valve, the second inlet electric valve, the first slag remover, the second slag remover, the first oil remover, the second oil remover, the first heater, the second heater, the first temperature sensor, the second temperature sensor, the first float level switch, the second float level switch, the first sewage pump, the second sewage pump, the third sewage pump, the fourth sewage pump, and the connecting electric valve are all electrically connected to the electrical control cabinet.
[0006] Furthermore, the first box and the second box are adjacent to each other and integrally formed, and the first box and the second box are separated by a box partition.
[0007] Furthermore, the PLC controller includes a main circuit, which comprises a three-phase four-wire power supply. The three-phase four-wire power supply is sequentially connected to the first circuit breaker QF1, the first AC contactor KM1-1, the second AC contactor KM1-2, the first thermal relay KH1, and the first inlet electric valve to form the first inlet electric valve drive branch. The three-phase four-wire power supply is sequentially connected to the second circuit breaker QF2, the third AC contactor KM2-1, the fourth AC contactor KM2-2, the second thermal relay KH2, and the second inlet electric valve to form the second inlet electric valve drive branch. The three-phase four-wire power supply is sequentially connected to the third circuit breaker QF3, the fifth AC contactor KM3-1, the sixth AC contactor KM3-2, the third thermal relay KH3, and the connecting electric valve to form the connecting electric valve drive branch. The three-phase four-wire power supply is sequentially connected to the fourth circuit breaker QF4, the seventh AC contactor KM4, the fourth thermal relay KH4, and the first slag remover to form the first slag remover drive branch. The three-phase four-wire power supply is sequentially connected to the fifth circuit breaker QF5, the eighth AC contactor KM5, the fifth thermal relay KH5, and the second slag remover to form the second slag remover drive branch. The three-phase four-wire power supply is sequentially connected to the sixth circuit breaker QF6, the ninth AC contactor KM6, the sixth thermal relay KH6, and the first oil separator to form the first oil separator drive branch. The three-phase four-wire power supply is sequentially connected to the seventh circuit breaker QF7, the tenth AC contactor KM7, the seventh thermal relay KH7, and the second oil separator to form the second oil separator drive branch. The three-phase four-wire power supply is sequentially connected to the eighth circuit breaker QF8, the eleventh AC contactor KM8, the eighth thermal relay KH8, and the first sewage pump to form the first sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the ninth circuit breaker QF9, the twelfth AC contactor KM9, the ninth thermal relay KH9, and the second sewage pump to form the second sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the tenth circuit breaker QF10, the thirteenth AC contactor KM10, the tenth thermal relay KH10, and the third sewage pump to form the third sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the eleventh circuit breaker QF11, the fourteenth AC contactor KM11, the eleventh thermal relay KH11, and the fourth sewage pump to form the fourth sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the twelfth circuit breaker QF12, the fifteenth AC contactor KM12, the twelfth thermal relay KH12, and the first heater to form the first heater drive branch. The three-phase four-wire power supply is sequentially connected to the thirteenth circuit breaker QF13, the sixteenth AC contactor KM13, the thirteenth thermal relay KH13, and the second heater to form the second heater drive branch.
[0008] Furthermore, the PLC controller includes a control loop, which comprises: The first control circuit controls the first changeover switch SA1, the first AC contactor KM1-1, the second AC contactor KM1-2, and the first inlet electric valve; The second control circuit controls the second changeover switch SA2, the third AC contactor KM2-1, the fourth AC contactor KM2-2, and the second inlet electric valve; The third control circuit controls the third changeover switch SA3, the fifth AC contactor KM3-1, the sixth AC contactor KM3-2, and the connected electric valve; The fourth control circuit controls the fourth changeover switch SA4, the seventh AC contactor KM4, and the first slag remover; The fifth control circuit controls the fifth changeover switch SA5, the eighth AC contactor KM5, and the second slag remover; The sixth control circuit controls the sixth changeover switch SA6, the ninth AC contactor KM6, and the first oil separator; The seventh control circuit controls the seventh changeover switch SA7, the tenth AC contactor KM7, and the second oil separator; The eighth control circuit controls the eighth changeover switch SA8, the eleventh AC contactor KM8, and the first sewage pump; The ninth control circuit controls the ninth changeover switch SA9, the twelfth AC contactor KM9, and the second sewage pump; The tenth control circuit controls the tenth changeover switch SA10, the thirteenth AC contactor KM10, and the third sewage pump; The eleventh control circuit controls the eleventh changeover switch SA11, the fourteenth AC contactor KM11, and the fourth sewage pump; The twelfth control circuit controls the twelfth changeover switch SA12, the fifteenth AC contactor KM12, and the first heater; The thirteenth control circuit controls the thirteenth changeover switch SA13, the sixteenth AC contactor KM13, and the second heater.
[0009] Furthermore, the upper part of the first sewage lifting chamber and the second sewage lifting chamber is provided with a vent.
[0010] Furthermore, the water inlet end of the intermediate pipeline is at the same height as the upper end of the first drainage pipeline, the second drainage pipeline, the third drainage pipeline, and the fourth drainage pipeline.
[0011] The oil-water separation equipment control method using the aforementioned oil-water separation equipment control system is characterized by comprising the following steps: Step S1) The first inlet electric valve is opened and the second inlet electric valve remains closed. The oily wastewater flows into the first slag removal chamber through the first inlet electric valve, where the solid waste flowing in is intercepted. Step S2) The wastewater after slag removal enters the first oil-water separation chamber. The first heater heats the oil-containing water. When the temperature reaches the set temperature, the first heater stops working, and the oil and wastewater are automatically separated. The first oil removal machine runs intermittently to discharge the upper layer of oil sludge from the first oil-water separation chamber. Step S3) When the liquid level in the first sewage lifting chamber exceeds the pump start level of the first float level switch, the first sewage pump starts running and accumulates running time. The sewage in the first sewage lifting chamber is discharged out of the tank through the first sewage pump and the first check valve. Step S4) When the liquid level in the first sewage lifting chamber drops to the pump stop level of the first float level switch, the first sewage pump stops working and the cumulative running time of the first sewage pump is reset to zero. Step S5) When the cumulative running time of the first sewage pump exceeds the sewage pump rotation time preset by the electrical control cabinet, the first sewage pump stops working and the cumulative running time is reset to zero. If the liquid level is still above the pump start level, the second sewage pump starts working and accumulates running time. Sewage is discharged from the tank through the second sewage pump and the second check valve. Step S6) When the liquid level in the first sewage lifting chamber exceeds the warning level of the first float level switch, the first sewage pump and the second sewage pump start simultaneously, and the sewage is discharged from the tank through the first sewage pump and the first check valve, the second sewage pump and the second check valve. Step S7) When the liquid level in the first sewage lifting chamber reaches the warning level of the first float level switch for a duration exceeding the preset sewage discharge time of the electrical control cabinet, the connecting electric valve opens, and the sewage in the first sewage lifting chamber enters the second sewage lifting chamber through the connecting electric valve. Step S8) When the liquid level in the second sewage lifting chamber exceeds the pump start level of the second float level switch, the third sewage pump starts running and accumulates the running time. The sewage in the second sewage lifting chamber is discharged out of the second sewage lifting chamber through the third sewage pump and the third check valve. Step S9) When the liquid level in the second sewage lifting chamber drops to the pump stop level of the second float level switch, the third sewage pump stops working and the cumulative running time of the third sewage pump is reset to zero. Step S10) When the cumulative running time of the third sewage pump exceeds the sewage pump rotation time preset by the electrical control cabinet, the third sewage pump stops working and the cumulative running time is reset to zero. If the liquid level is still above the pump start level, the fourth sewage pump starts working and accumulates running time. Sewage is discharged from the second sewage lifting room through the fourth sewage pump and the fourth check valve; return to step S1 and cycle.
[0012] Compared with the prior art, the present invention has the following technical effects: This invention allows oily wastewater from different inlets to enter the equipment housing by controlling the on / off state of the inlet electric valve. It also connects the two housings by controlling the on / off state of the connecting electric valve. Furthermore, it enables drainage through different sewage pumps by manually or automatically controlling the start / stop states of the first, second, third, and fourth sewage pumps. The combination of these multiple control methods allows for the reasonable rotation of two systems, one in use and one on standby, avoiding inlet blockage, ensuring smooth sewage treatment, and improving equipment utilization. This invention features a built-in slag remover that promptly removes large particles of waste without the need for retrieval, preventing blockages and ensuring a smoother wastewater treatment process. The combination of multiple control methods enhances the utilization rate of wastewater treatment equipment, reduces equipment failure rates, and extends equipment lifespan. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the system structure of the present invention; Figure 2 This is a schematic diagram of the main circuit of the present invention; Figure 3 This is a schematic diagram of the first to eighth control loops of the present invention; Figure 4 This is a schematic diagram of the ninth to thirteenth control loops of the present invention; Figure 5 This is a schematic diagram of the PLC control loop of the present invention; Figure 6 This is a schematic diagram of the signal feedback acquisition and control loop of the first enclosure device of the present invention; Figure 7 This is a schematic diagram of the signal feedback acquisition and control loop of the second enclosure device of the present invention.
[0014] The parts in the attached diagram are labeled as follows: 1. First inlet electric valve; 2. First slag remover; 3. First oil remover. 4 First heater, 5 First temperature sensor, 6 First float level switch 7 First sewage pump, 8 Second sewage pump, 9 First check valve, 10 Second check valve 11 Vent, 12 Second Electric Water Inlet Valve, 13 Second Slag Remover 14 Second oil separator, 15 Second heater, 16 Second temperature sensor, 17 Second float level switch, 18 Third sewage pump, 19 Fourth sewage pump, 20 Third check valve, 21 Fourth check valve, 22 Connecting electric valve, 23 PLC controller, 24 First slag removal chamber, 25 First oil-water separation chamber, 26 First wastewater lifting chamber, 27 Second sludge removal chamber, 28 Second oil-water separation chamber, 29 Second sewage lifting room, 30 Main effluent pipe. Detailed Implementation
[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0016] This embodiment discloses a control system for an oil separation treatment device, such as... Figure 1 As shown, the mechanical structure of this embodiment includes a water inlet unit, a first housing, and a second housing. The water inlet unit includes a first water inlet pipe and a second water inlet pipe. The first water inlet pipe and the second water inlet pipe are respectively connected to the inlets at the front ends of the first housing and the second housing. The first water inlet pipe is equipped with a first water inlet electric valve 1, and the second water inlet pipe is equipped with a second water inlet electric valve 12. The first housing and the second housing are adjacent to each other and integrally formed. The first housing and the second housing are separated by a housing partition.
[0017] The first chamber contains, from front to back, a first slag removal chamber 24, a first oil-water separation chamber 25, and a first sewage lifting chamber 26. A first water inlet pipe is connected to the inlet of the first slag removal chamber 24. The first slag removal chamber 24 is equipped with a first slag remover 2. The upper part of the first slag removal chamber 24 is separated from the first oil-water separation chamber 25 by a vertical partition. The lower part of the first slag removal chamber 24 is connected to the first oil-water separation chamber 25. The upper part of the first oil-water separation chamber 25 is separated from the first sewage lifting chamber 26 by a vertical partition. The upper part of the first oil-water separation chamber 25 is equipped with a first oil remover 3. An oil removal machine 3 is equipped with a first heater 4 and a first temperature sensor 5. The lower part of the first oil-water separation chamber 25 is connected to the first sewage lifting chamber 26. The first sewage lifting chamber 26 is equipped with a first float level switch 6. The rear part of the first sewage lifting chamber 26 is equipped with a first drainage pipe and a second drainage pipe. The first drainage pipe is equipped with a first sewage pump 7 and a first check valve 9 in sequence along the water outlet direction. The second drainage pipe is equipped with a second sewage pump 8 and a second check valve 10 in sequence along the water outlet direction. The first drainage pipe and the second drainage pipe converge to the main water outlet pipe 30.
[0018] The second chamber contains, from front to back, a second slag removal chamber 27, a second oil-water separation chamber 28, and a second sewage lifting chamber 29. A second water inlet pipe is connected to the inlet of the second slag removal chamber 27. The second slag removal chamber 27 is equipped with a second slag remover 13. The upper part of the second slag removal chamber 27 is separated from the second oil-water separation chamber 28 by a vertical partition. The lower part of the second slag removal chamber 27 is connected to the second oil-water separation chamber 28. The upper part of the second oil-water separation chamber 28 is separated from the second sewage lifting chamber 29 by a vertical partition. The upper part of the second oil-water separation chamber 28 is equipped with a second slag remover 13. The second oil separator 14 is equipped with a second heater 15 and a second temperature sensor 16. The lower part of the second oil-water separation chamber 28 is connected to the second sewage lifting chamber 29. The second sewage lifting chamber 29 is equipped with a second float level switch 17. The rear part of the second sewage lifting chamber 29 is equipped with a third drainage pipe and a fourth drainage pipe. The third drainage pipe is equipped with a third sewage pump 18 and a third check valve 20 in sequence along the water outlet direction. The fourth drainage pipe is equipped with a fourth sewage pump 19 and a fourth check valve 21 in sequence along the water outlet direction. The third drainage pipe and the fourth drainage pipe converge to the main water outlet pipe 30. The rear ends of the first sewage lifting chamber 26 and the second sewage lifting chamber 29 are connected by an intermediate pipeline. The intermediate pipeline is equipped with a connecting electric valve 22. The water inlet end of the intermediate pipeline 22 is level with the upper end of the first drainage pipeline, the second drainage pipeline, the third drainage pipeline, and the fourth drainage pipeline.
[0019] The first inlet electric valve 1, the second inlet electric valve 12, the first slag remover 2, the second slag remover 13, the first oil remover 3, the second oil remover 14, the first heater 4, the second heater 15, the first temperature sensor 5, the second temperature sensor 16, the first float level switch 6, the second float level switch 17, the first sewage pump 7, the second sewage pump 8, the third sewage pump 18, the fourth sewage pump 19, and the connecting electric valve 22 are all electrically connected to the electrical control cabinet 23.
[0020] The electrical components of this embodiment include a PLC controller 23 installed in an electrical control box. The PLC controller 23 has a main circuit, such as... Figure 2 As shown, the main circuit includes a three-phase four-wire power supply. A three-phase four-wire power supply is sequentially connected to the first circuit breaker QF1, the first AC contactor KM1-1, the second AC contactor KM1-2, the first thermal relay KH1, and the first inlet electric valve 1 to form the first inlet electric valve drive branch. The three-phase four-wire power supply is sequentially connected to the second circuit breaker QF2, the third AC contactor KM2-1, the fourth AC contactor KM2-2, the second thermal relay KH2, and the second inlet electric valve 12 to form the second inlet electric valve drive branch. The three-phase four-wire power supply is connected in sequence to the third circuit breaker QF3, the fifth AC contactor KM3-1, the sixth AC contactor KM3-2, the third thermal relay KH3, and the connecting electric valve 22 to form the connecting electric valve drive branch. The three-phase four-wire power supply is sequentially connected to the fourth circuit breaker QF4, the seventh AC contactor KM4, the fourth thermal relay KH4, and the first slag remover 2 to form the first sludge removal machine drive branch. The three-phase four-wire power supply is sequentially connected to the fifth circuit breaker QF5, the eighth AC contactor KM5, the fifth thermal relay KH5, and the second slag remover 13 to form the second decontamination machine drive branch. The three-phase four-wire power supply is sequentially connected to the sixth circuit breaker QF6, the ninth AC contactor KM6, the sixth thermal relay KH6, and the first oil separator 3 to form the first oil separator drive branch. The three-phase four-wire power supply is sequentially connected to the seventh circuit breaker QF7, the tenth AC contactor KM7, the seventh thermal relay KH7, and the second oil separator 14 to form the second oil separator drive branch. The three-phase four-wire power supply is sequentially connected to the eighth circuit breaker QF8, the eleventh AC contactor KM8, the eighth thermal relay KH8, and the first sewage pump 7 to form the first sewage pump drive branch. The three-phase four-wire power supply is connected in sequence to the ninth circuit breaker QF9, the twelfth AC contactor KM9, the ninth thermal relay KH9, and the second sewage pump 8 to form the second sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the tenth circuit breaker QF10, the thirteenth AC contactor KM10, the tenth thermal relay KH10, and the third sewage pump 18 to form the third sewage pump drive branch. The three-phase four-wire power supply is connected in sequence to the eleventh circuit breaker QF11, the fourteenth AC contactor KM11, the eleventh thermal relay KH11, and the fourth sewage pump 19 to form the fourth sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the twelfth circuit breaker QF12, the fifteenth AC contactor KM12, the twelfth thermal relay KH12, and the first heater 4 to form the first heater drive branch. The three-phase four-wire power supply is connected in sequence to the thirteenth circuit breaker QF13, the sixteenth AC contactor KM13, the thirteenth thermal relay KH13, and the second heater 15 to form the second heater drive branch.
[0021] The PLC controller 23 also includes a control loop, such as... Figure 3 He Ru Figure 4 As shown, the control loop includes, The first control circuit controls the first changeover switch SA1, the first AC contactor KM1-1, the second AC contactor KM1-2, and the first inlet electric valve 1; The second control circuit controls the second changeover switch SA2, the third AC contactor KM2-1, the fourth AC contactor KM2-2, and the second inlet electric valve 12; The third control circuit controls the third changeover switch SA3, the fifth AC contactor KM3-1, the sixth AC contactor KM3-2, and connects to the electric valve 22; The fourth control circuit controls the fourth changeover switch SA4, the seventh AC contactor KM4, and the first slag remover 2; The fifth control circuit controls the fifth changeover switch SA5, the eighth AC contactor KM5, and the second slag remover 13; The sixth control circuit controls the sixth changeover switch SA6, the ninth AC contactor KM6, and the first oil separator 3; The seventh control circuit controls the seventh changeover switch SA7, the tenth AC contactor KM7, and the second oil separator 14; The eighth control circuit controls the eighth changeover switch SA8, the eleventh AC contactor KM8, and the first sewage pump 7; The ninth control circuit controls the ninth changeover switch SA9, the twelfth AC contactor KM9, and the second sewage pump 8; The tenth control circuit controls the tenth changeover switch SA10, the thirteenth AC contactor KM10, and the third sewage pump 18; The eleventh control circuit controls the eleventh changeover switch SA11, the fourteenth AC contactor KM11, and the fourth sewage pump 19; The twelfth control circuit controls the twelfth changeover switch SA12, the fifteenth AC contactor KM12, and the first heater 4; The thirteenth control circuit controls the thirteenth changeover switch SA13, the sixteenth AC contactor KM13, and the second heater 15.
[0022] In this embodiment, the first box is designated as area A, and the second box is designated as area B, both controlled by the PLC controller 23.
[0023] like Figures 5-7 As shown, the PLC controller 23 collects real-time data from each electric valve, sewage pump, slag removal chamber, oil separator, float, and heater, and controls the start / stop or switching of these devices through logic operations. The real-time data specifically includes: The manual / automatic, open, and closed signals of the first inlet electric valve 1 and the second inlet electric valve 12; the manual / automatic, running, and fault signals of the first sewage pump 7, the second sewage pump 8, the third sewage pump 18, and the fourth sewage pump 19; the manual / automatic, running, and fault signals of the first slag remover 2 and the second slag remover 13; the manual / automatic, running, and fault signals of the first oil remover 3 and the second oil remover 14; the manual / automatic and running signals of the first heater 4 and the second heater 15; and the digital signals indicating the on / off status of the first float level switch 6 and the second float level switch 17.
[0024] The PLC controller 23 is equipped with a touch screen, which is connected to the PLC controller 23 for communication. The preset parameters of the oil separation equipment control system in this embodiment can be set through the touch screen. The preset parameters specifically include: the rotation time of the sewage pump, the warning liquid level, the float pump start liquid level, the pump stop liquid level, the set heating temperature, the setting of the intermittent operation time of the slag remover, the setting of the day and night time interval of the slag remover, the selection of the working mode of the slag remover, and the selection of the system start mode.
[0025] The touch screen of PLC controller 23 displays the operating and fault status of electric valves, slag remover, oil remover, sewage pump, and the on / off signals of float level switch.
[0026] The PLC controller 23 is also equipped with an Fbox IoT gateway module. The Fbox module communicates with the PLC controller 23. The Fbox IoT gateway module uploads the real-time data (such as operating status and fault status, and liquid level signal of the tank) collected by the PLC controller 23 from the electric valve, sewage pump, slag remover, oil remover, float level switch and heater to the cloud server via 4G or wired network. Users can view the operating data through mobile app or web page.
[0027] In this embodiment, the slag removal chamber, oil-water separation chamber, and sewage lifting chamber are all independent and sealed boxes. When a single component in the electric valve, slag remover, oil remover, heater, or sewage pump fails, the third control loop controls the opening of the electric valve 22 to connect the two sewage lifting chambers, ensuring the normal operation of the entire system.
[0028] The system startup mode in the touch screen preset parameters includes two modes: one active and one standby, and all active. The initial preset is one active and one standby, and the system runs in this mode by default when it is powered on. The touchscreen presets the working modes of the slag remover and oil remover, including intermittent operation control and flow monitoring control. Since the amount of sewage is small at night, and it is necessary to prevent the slag remover and heater from being idle for a long time, the accumulation of a large amount of debris at the slag remover inlet, and the waste of energy, the intermittent operation mode is used by default at night.
[0029] When the real-time liquid level in the tank reaches the pump stop position and the float level switch activates, the flow detection mode is activated and the cumulative timer begins. When the real-time liquid level in the tank reaches the pump start position, the cumulative timer value ends. When the cumulative detection time exceeds the preset flow detection time of PLC controller 23, it indicates that the sewage flow is interrupted or the water flow in the pipeline is too small. The slag remover and oil remover will automatically enter the intermittent operation mode and work intermittently under the time control of the preset parameters of PLC controller 23.
[0030] Conversely, if the cumulative detection time is shorter than the preset flow detection time of PLC controller 23, it indicates that the sewage flow is moderate at this time. The slag remover and oil remover automatically select to operate in the flow detection mode, that is, the slag remover and heater are working at full load. Appropriately extending the preset flow detection time of PLC controller 23 can improve the utilization rate of the equipment and reduce energy consumption.
[0031] After the system is powered on, the PLC controller 23 automatically collects the built-in system clock time, automatically distinguishes between day and night through logical comparison, and automatically selects the system's working mode according to the time range set by the system's preset day and night time intervals. The system defaults to running in flow monitoring mode during the day and time rotation mode at night.
[0032] In the system's one-in-one-backup startup mode, when the PLC controller 23 detects a fault in any of the slag removers, the system will automatically switch to the other slag remover to ensure the normal operation of the entire system.
[0033] The oil-water separation equipment control method of this embodiment operates in a default one-use-one-standby mode after the equipment is powered on, specifically including the following steps: Step S1) The first inlet electric valve 1 is opened and the second inlet electric valve 12 is kept closed. The oily wastewater flows into the first slag removal chamber 24 through the first inlet electric valve 1, and the first slag removal chamber 24 intercepts the solid waste flowing in. Step S2) The wastewater after slag removal enters the first oil-water separation chamber 25. As the liquid level rises, the first heater 4 starts to heat the oil-containing water. When the temperature sensor 5 detects that the temperature has reached the set value, the first heater 4 stops working. At the same time, the first heater 4 and the sewage pump group work together to automatically separate the oil and wastewater. The first oil remover 3 runs intermittently. The first oil remover 3 can only work after the temperature reaches the set value and the intermittent running time has been reached, and the upper layer of oil in the first oil-water separation chamber 25 is discharged out of the first tank. Step S3) When the liquid level of the first sewage lifting chamber 26 exceeds the pump start level of the first float level switch 6, the action signal is uploaded to the PLC controller 23. The PLC controller 23 starts the first sewage pump 7 through logic operation. The first sewage pump 7 runs and accumulates the running time. The sewage in the first tank is discharged out of the tank through the first sewage pump 7 and the first one-way valve 9. Step S4) When the liquid level in the first sewage lifting chamber 26 drops to the pump stop level of the first float level switch 6, the first sewage pump 7 stops working and the cumulative running time of the first sewage pump 7 is reset to zero. Step S5) When the cumulative running time of the first sewage pump 7 exceeds the sewage pump rotation time preset by the electrical control cabinet 23, the first sewage pump 7 stops working and the cumulative running time is reset to zero. If the liquid level is still above the pump start level, the second sewage pump 8 starts working and accumulates the running time. Sewage is discharged from the tank through the second sewage pump 8 and the second check valve 10. Step S6) When the system is in intermittent operation control mode, and the intermittent operation time reaches the time set by PLC controller 23, PLC controller 23 controls the first inlet electric valve 1 to close and the second inlet electric valve 12 to open. Sewage flows into the second slag remover 13 through the second inlet electric valve 12, and the second slag remover 13 intercepts the flowing solid waste. Step S7) The intercepted sludge is automatically discharged from the second tank, and the sewage enters the second oil-water separation unit 28. As the liquid level rises, the second heater 14 starts to work. When the second temperature sensor 16 detects that the temperature has reached the set value, the second heater 14 stops working. At the same time, the second heater 14 and the sewage pump group work together. The second oil remover 15 can only work after the temperature reaches the set value and the intermittent running time has been reached, and discharges the upper layer of oil sludge in the second oil-water separation unit 28 into the second tank. Step S8) The second sewage lifting unit 29 changes as the liquid level rises. When it exceeds the pump start level, the liquid level switch in the second liquid level gauge group 17 is activated and the action signal is transmitted to the PLC controller 23. The PLC controller 23 starts the third sewage pump 19 through logic operation. The third sewage pump 19 starts running and accumulates the running time. Sewage is discharged from the second tank through the third sewage pump 19 and the third check valve 21. Step S9) When the liquid level of the second sewage lifting unit 29 drops to the pump stop level, the third sewage pump 19 stops working. Step S10) When the cumulative running time of the third sewage pump 19 exceeds the sewage pump rotation time preset by the PLC controller 23, the fourth sewage pump 18 starts running, the third sewage pump 19 stops, and the cumulative running time of the third sewage pump 19 is reset to zero. The fourth sewage pump 18 starts to accumulate time, and the sewage is discharged from the second tank through the fourth sewage pump 18 and the fourth check valve 20. Step S11) When the PLC controller 23 detects that the system intermittent running time has reached the set value, it returns to step S1 and repeats the cycle.
[0034] In this embodiment, the system operates in the current startup mode. For example, if the PLC controller 23 detects a malfunction in the first slag remover 2 or the second slag remover 13, it automatically closes the first inlet electric valve 1 or the second inlet electric valve 12, and simultaneously opens the second inlet electric valve 12 or the first inlet electric valve 1, activating the corresponding slag remover to intercept solid waste.
[0035] When a single slag remover, heater, or oil remover fails, the system uses the opening or closing of the electric valve 22 to allow the sewage pump in the sewage lifting unit to operate in rotation over time, thus preventing the impeller or bearing from oxidizing and rusting due to prolonged shutdown of the sewage pump.
[0036] Considering that dirt may get stuck in the impeller of the sewage pump during operation, causing a reduction in the pump's lifting capacity, when the PLC controller 23 detects that the warning level switch in the float level switch has been activated, the connecting electric valve 22 will also open automatically, and all sewage pumps will be put into standby mode. Once the water level in the tank drops to the pump stop level, the connecting electric valve 22 will be closed, and normal operation will resume.
[0037] In this embodiment, considering the impact of a surge in load per unit time on the system when the sewage source water volume is too large, a first warning level switch and a second warning level switch are installed in the sewage lifting unit. When the system is in a one-use-one-standby working mode and all sewage pumps are in operation, and there are no system faults, the liquid level in the sewage lifting unit can still trigger the warning level switch. To prevent sewage from overflowing the tank and causing secondary pollution, the system will automatically switch to the all-in operation mode, that is, all components of the slag removal chamber, oil removal chamber and sewage lifting chamber are in operation. After the tank water level drops to the pump stop level, the connecting electric valve 22 is closed to restore the one-use-one-standby operation mode.
[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure made using the contents of the present invention specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. A control system for an oil separation treatment device, characterized in that, It includes a water inlet unit, a first housing, a second housing, and an electrical control cabinet. The water inlet unit includes a first water inlet pipe and a second water inlet pipe. The first water inlet pipe and the second water inlet pipe are respectively connected to the inlets at the front end of the first housing and the second housing. The first water inlet pipe is equipped with a first water inlet electric valve, and the second water inlet pipe is equipped with a second water inlet electric valve. The first chamber contains, from front to back, a first slag removal chamber, a first oil-water separation chamber, and a first sewage lifting chamber. The first inlet pipe is connected to the inlet of the first slag removal chamber. The upper part of the first slag removal chamber and the first oil-water separation chamber are separated by a vertical partition. The first slag removal chamber is equipped with a first slag removal machine. The lower part of the first slag removal chamber is connected to the first oil-water separation chamber. The upper part of the first oil-water separation chamber and the first sewage lifting chamber are separated by a vertical partition. The upper part of the first oil-water separation chamber is equipped with a first oil removal machine. The first oil removal machine is equipped with a first heater and a first temperature sensor. The lower part of the first oil-water separation chamber is connected to the first sewage lifting chamber. The first sewage lifting chamber is equipped with a first float level switch. The rear part of the first sewage lifting chamber is equipped with a first drainage pipe and a second drainage pipe. The first drainage pipe is equipped with a first sewage pump and a first check valve in sequence along the water outlet direction. The second drainage pipe is equipped with a second sewage pump and a second check valve in sequence along the water outlet direction. The first drainage pipe and the second drainage pipe converge to the main water outlet pipe. The second chamber contains, from front to back, a second slag removal chamber, a second oil-water separation chamber, and a second sewage lifting chamber. The second water inlet pipe is connected to the inlet of the second slag removal chamber. The upper part of the second slag removal chamber is separated from the second oil-water separation chamber by a vertical partition. The second slag removal chamber is equipped with a second slag removal machine. The lower part of the second slag removal chamber is connected to the second oil-water separation chamber. The upper part of the second oil-water separation chamber is separated from the second sewage lifting chamber by a vertical partition. The upper part of the second oil-water separation chamber is equipped with a second oil removal machine, which is equipped with a second heater and a second temperature sensor. The lower part of the second oil-water separation chamber is connected to the second sewage lifting chamber. The second sewage lifting chamber is equipped with a second float level switch. The rear part of the second sewage lifting chamber is equipped with a third drainage pipe and a fourth drainage pipe. The third drainage pipe is equipped with a third sewage pump and a third check valve in sequence along the water outlet direction. The fourth drainage pipe is equipped with a fourth sewage pump and a fourth check valve in sequence along the water outlet direction. The third and fourth drainage pipes converge into the main water outlet pipe. The rear ends of the first sewage lifting chamber and the second sewage lifting chamber are connected by an intermediate pipeline, which is equipped with a connecting electric valve. The first inlet electric valve, the second inlet electric valve, the first slag remover, the second slag remover, the first oil remover, the second oil remover, the first heater, the second heater, the first temperature sensor, the second temperature sensor, the first float level switch, the second float level switch, the first sewage pump, the second sewage pump, the third sewage pump, the fourth sewage pump, and the connecting electric valve are all electrically connected to the electrical control cabinet.
2. The oil separation equipment control system according to claim 1, characterized in that, The first box and the second box are adjacent to each other and integrally formed, and the first box and the second box are separated by a box partition.
3. The oil separation equipment control system according to claim 1, characterized in that, The PLC controller has a main circuit, which includes a three-phase four-wire power supply. The three-phase four-wire power supply is sequentially connected to the first circuit breaker QF1, the first AC contactor KM1-1, the second AC contactor KM1-2, the first thermal relay KH1, and the first inlet electric valve to form the first inlet electric valve drive branch. The three-phase four-wire power supply is sequentially connected to the second circuit breaker QF2, the third AC contactor KM2-1, the fourth AC contactor KM2-2, the second thermal relay KH2, and the second inlet electric valve to form the second inlet electric valve drive branch. The three-phase four-wire power supply is sequentially connected to the third circuit breaker QF3, the fifth AC contactor KM3-1, the sixth AC contactor KM3-2, the third thermal relay KH3, and the connecting electric valve to form the connecting electric valve drive branch. The three-phase four-wire power supply is sequentially connected to the fourth circuit breaker QF4, the seventh AC contactor KM4, the fourth thermal relay KH4, and the first slag remover to form the first slag remover drive branch. The three-phase four-wire power supply is sequentially connected to the fifth circuit breaker QF5, the eighth AC contactor KM5, the fifth thermal relay KH5, and the second slag remover to form the second slag remover drive branch. The three-phase four-wire power supply is sequentially connected to the sixth circuit breaker QF6, the ninth AC contactor KM6, the sixth thermal relay KH6, and the first oil separator to form the first oil separator drive branch. The three-phase four-wire power supply is sequentially connected to the seventh circuit breaker QF7, the tenth AC contactor KM7, the seventh thermal relay KH7, and the second oil separator to form the second oil separator drive branch. The three-phase four-wire power supply is sequentially connected to the eighth circuit breaker QF8, the eleventh AC contactor KM8, the eighth thermal relay KH8, and the first sewage pump to form the first sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the ninth circuit breaker QF9, the twelfth AC contactor KM9, the ninth thermal relay KH9, and the second sewage pump to form the second sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the tenth circuit breaker QF10, the thirteenth AC contactor KM10, the tenth thermal relay KH10, and the third sewage pump to form the third sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the eleventh circuit breaker QF11, the fourteenth AC contactor KM11, the eleventh thermal relay KH11, and the fourth sewage pump to form the fourth sewage pump drive branch. The three-phase four-wire power supply is sequentially connected to the twelfth circuit breaker QF12, the fifteenth AC contactor KM12, the twelfth thermal relay KH12, and the first heater to form the first heater drive branch. The three-phase four-wire power supply is sequentially connected to the thirteenth circuit breaker QF13, the sixteenth AC contactor KM13, the thirteenth thermal relay KH13, and the second heater to form the second heater drive branch.
4. The oil separation equipment control system according to claim 3, characterized in that, The PLC controller has a control loop, which includes... The first control circuit controls the first changeover switch SA1, the first AC contactor KM1-1, the second AC contactor KM1-2, and the first inlet electric valve; The second control circuit controls the second changeover switch SA2, the third AC contactor KM2-1, the fourth AC contactor KM2-2, and the second inlet electric valve; The third control circuit controls the third changeover switch SA3, the fifth AC contactor KM3-1, the sixth AC contactor KM3-2, and the connected electric valve; The fourth control circuit controls the fourth changeover switch SA4, the seventh AC contactor KM4, and the first slag remover; The fifth control circuit controls the fifth changeover switch SA5, the eighth AC contactor KM5, and the second slag remover; The sixth control circuit controls the sixth changeover switch SA6, the ninth AC contactor KM6, and the first oil separator; The seventh control circuit controls the seventh changeover switch SA7, the tenth AC contactor KM7, and the second oil separator; The eighth control circuit controls the eighth changeover switch SA8, the eleventh AC contactor KM8, and the first sewage pump; The ninth control circuit controls the ninth changeover switch SA9, the twelfth AC contactor KM9, and the second sewage pump; The tenth control circuit controls the tenth changeover switch SA10, the thirteenth AC contactor KM10, and the third sewage pump; The eleventh control circuit controls the eleventh changeover switch SA11, the fourteenth AC contactor KM11, and the fourth sewage pump; The twelfth control circuit controls the twelfth changeover switch SA12, the fifteenth AC contactor KM12, and the first heater; The thirteenth control circuit controls the thirteenth changeover switch SA13, the sixteenth AC contactor KM13, and the second heater.
5. The oil separation equipment control system according to claim 1, characterized in that, Ventilation vents are provided at the top of the first and second sewage lifting chambers.
6. The oil separation equipment control system according to claim 1, characterized in that, The water inlet of the intermediate pipeline is level with the upper end of the first, second, third, and fourth drainage pipelines.
7. A control method for an oil-water separation equipment using the control system of the oil-water separation equipment as described in claim 1, characterized in that, Includes the following steps: Step S1) The first inlet electric valve is opened and the second inlet electric valve remains closed. The oily wastewater flows into the first slag removal chamber through the first inlet electric valve, where the solid waste flowing in is intercepted. Step S2) The wastewater after slag removal enters the first oil-water separation chamber. The first heater heats the oil-containing water. When the temperature reaches the set temperature, the first heater stops working, and the oil and wastewater are automatically separated. The first oil removal machine runs intermittently to discharge the upper layer of oil sludge from the first oil-water separation chamber. Step S3) When the liquid level in the first sewage lifting chamber exceeds the pump start level of the first float level switch, the first sewage pump starts running and accumulates running time. The sewage in the first sewage lifting chamber is discharged out of the tank through the first sewage pump and the first check valve. Step S4) When the liquid level in the first sewage lifting chamber drops to the pump stop level of the first float level switch, the first sewage pump stops working and the cumulative running time of the first sewage pump is reset to zero. Step S5) When the cumulative running time of the first sewage pump exceeds the sewage pump rotation time preset by the electrical control cabinet, the first sewage pump stops working and the cumulative running time is reset to zero. If the liquid level is still above the pump start level, the second sewage pump starts working and accumulates running time. Sewage is discharged from the tank through the second sewage pump and the second check valve. Step S6) When the liquid level in the first sewage lifting chamber exceeds the warning level of the first float level switch, the first sewage pump and the second sewage pump start simultaneously, and the sewage is discharged from the tank through the first sewage pump and the first check valve, the second sewage pump and the second check valve. Step S7) When the liquid level in the first sewage lifting chamber reaches the warning level of the first float level switch for a duration exceeding the preset sewage discharge time of the electrical control cabinet, the connecting electric valve opens, and the sewage in the first sewage lifting chamber enters the second sewage lifting chamber through the connecting electric valve. Step S8) When the liquid level in the second sewage lifting chamber exceeds the pump start level of the second float level switch, the third sewage pump starts running and accumulates the running time. The sewage in the second sewage lifting chamber is discharged out of the second sewage lifting chamber through the third sewage pump and the third check valve. Step S9) When the liquid level in the second sewage lifting chamber drops to the pump stop level of the second float level switch, the third sewage pump stops working and the cumulative running time of the third sewage pump is reset to zero. Step S10) When the cumulative running time of the third sewage pump exceeds the sewage pump rotation time preset by the control cabinet, the third sewage pump stops working and the cumulative running time is reset to zero. If the liquid level is still above the pump start level, the fourth sewage pump starts working and accumulates running time. Sewage is discharged from the second sewage lifting room through the fourth sewage pump and the fourth check valve. Return to step S1 and repeat the process.