Electrically-controlled purified water primary concentrated water recycling system

Abstract

The invention discloses an electrically controlled purified water primary concentrated water recycling system, which relates to the technical field of purification and recycling, and comprises reverse osmosis water production equipment, a buffer water tank, a water feeding pump, an anti-backflow valve, a cooling tower and a raw water tank, the raw water tank conveys raw water to the reverse osmosis water production equipment, the reverse osmosis water production equipment discharges concentrated water, the concentrated water sequentially flows through the buffer water tank, the water feeding pump and the anti-backflow valve, and the anti-backflow valve conveys the concentrated water to the cooling tower and the raw water tank respectively; the water feeding pump is electrically connected with a control assembly. According to the invention, based on the concepts of clean production and cyclic utilization, the optimal combination of similar reclaimed water recycling and reusing and water production processes is researched, the water source is effectively utilized, the recycling rate of water is improved, and important measures for reducing resource consumption are put into practice, so that the win-win situation of enterprise benefits and social benefits is achieved; different application places are combined, and the purposes of zero energy surplus, zero emission and zero waste are fully achieved.

Description

Technical Field

[0001] The invention relates to the technical field of purification and recycling, and in particular to an electrically controlled purified water primary concentrated water recycling system. Background Art

[0002] As global water resources become increasingly scarce, the efficient use of water resources has gradually become one of the focuses of social and corporate attention. How to reduce waste and improve resource recycling has become an urgent problem to be solved. Reverse osmosis concentrate refers to high-concentration wastewater or reclaimed water produced during the reverse osmosis (RO) membrane treatment process. It is rich in inorganic salts, organic matter and other concentrated impurities. Since most of the concentrate is directly discharged into the natural environment or sewage treatment system during the reverse osmosis membrane water production process in traditional processes, a large amount of reusable water resources are lost in vain, which not only increases the cost of water treatment, but also increases the environmental burden.

[0003] Traditional recycling devices are usually limited by the volatility of water demand at the end, especially when water demand is low, the problem of excess concentrated water is prominent and difficult to recycle effectively; in addition, the recycling method of traditional devices is relatively single, lacking comprehensive consideration of water quality characteristics and reuse scenarios, and the recovery rate and utilization efficiency are both low. This inefficient model is obviously difficult to adapt to the needs of modern sustainable development. Summary of the invention

[0004] Based on this, it is necessary to provide an electrically controlled purified water primary concentrated water recovery and reuse system to address the above technical issues.

[0005] The present invention provides an electrically controlled purified water primary concentrated water recovery and reuse system, comprising a reverse osmosis water making device, a buffer water tank, a water supply pump, an anti-backflow valve, a cooling tower and a raw water tank; the raw water tank transports raw water to the reverse osmosis water making device, the reverse osmosis water making device discharges concentrated water, and the concentrated water flows through the buffer water tank, the water supply pump and the anti-backflow valve in sequence, and the anti-backflow valve transports the concentrated water to the cooling tower and the raw water tank respectively; the water supply pump is electrically connected to a control component.

[0006] Furthermore, in order to provide a buffer for the recovery of concentrated water, ensure the smooth operation of the system, and avoid overflow or system collapse caused by excessive concentrated water, an exhaust port is provided at the top of the cache water tank, a drain port is provided at the bottom of the cache water tank, and an overflow port is provided at the top of one side of the cache water tank. The drain port and the overflow port are connected by a pipe, and the wastewater in the cache water tank is discharged to sewage treatment.

[0007] Furthermore, in order to monitor the low liquid level and the high liquid level so that the control component can start or stop the reflux process of the concentrated water as needed to prevent the concentrated water from overflowing or lacking water, a liquid level sensor is provided on the top of the cache water tank away from the overflow port, and two monitoring pipes are inserted into the cache water tank from the bottom of the liquid level sensor to monitor the low liquid level and the high liquid level inside the cache water tank respectively.

[0008] Furthermore, in order to ensure the safe operation of the system and prevent any pollution source from flowing back into the purified water and raw water, a first upper liquid level port and a first lower liquid level port are arranged inside the cooling tower, and the height of the first upper liquid level port is greater than that of the first lower liquid level port. A second upper liquid level port and a second lower liquid level port are arranged inside the raw water tank, and the height of the second upper liquid level port is greater than that of the second lower liquid level port. The first upper liquid level port and the second upper liquid level port are both connected to the backflow prevention valve and maintain a three-way connection with the greening domestic water pipe; the first lower liquid level port and the second lower liquid level port are both connected to the municipal drinking water pipe.

[0009] Furthermore, in order to monitor water flow in real time, help the control component to perform electrical adjustment, realize automatic control, and adjust the water flow and water level according to actual needs to ensure system efficiency and stability, the water pipe branches where the first upper liquid level port, the first lower liquid level port, the second upper liquid level port and the second lower liquid level port are located are equipped with branch water meters, and the greening and domestic water pipes are equipped with main water meters. The branch water meters are all electrically connected to the control component, and the control component is electrically connected to the liquid level sensor.

[0010] Further, the control components include: a frequency converter, a pneumatic valve, a level relay, a circuit breaker, a water pump motor, a control power supply and a probe; Frequency converter, used to adjust the speed of the water pump and control the water flow and pressure; Pneumatic valve, used to control the on / off or flow regulation of the circulating water circuit; The liquid level relay is used to obtain the water level signal from the liquid level sensor. When the water level reaches the set high or low level, the contact state is changed to control the start and stop of the water pump. Circuit breakers, used for short circuit protection and overload protection to maintain safe operation; The water pump motor is used to connect and control the water pump, provide the power source for the water circulation, convert electrical energy into mechanical energy, and realize water transportation; Control power supply, used to provide working voltage for water circulation, transportation and detection; The probe is used to provide a high liquid level probe and a low liquid level probe, and cooperates with the liquid level sensor to detect water level changes and convert them into electrical signals to be transmitted to the liquid level relay.

[0011] Furthermore, the incoming line of the control power supply is connected to the input end of the circuit breaker, the output end of the circuit breaker is connected to the input end of the frequency converter, and the output end of the frequency converter is connected to the three-phase winding of the water pump motor; the control component is protected by the circuit breaker.

[0012] The beneficial effects of the present invention are as follows: starting from the concepts of clean production and recycling, studying the optimal combination of processes such as recycling and reuse of reclaimed water and production water use, effectively utilizing water resources, improving the recycling rate of water, and implementing important measures to reduce resource consumption, thereby achieving a win-win situation for corporate and social benefits; the present invention is combined with different application sites to fully achieve the goals of zero energy surplus, zero emissions, and zero waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a principle block diagram of an electrically controlled purified water primary concentrated water recovery and reuse system according to an embodiment of the present invention; Figure 2 The present invention is an electrical connection diagram of control components in an electrically controlled purified water primary concentrated water recovery and reuse system according to an embodiment of the present invention.

[0014] Figure numbers: 1. Reverse osmosis water production equipment; 2. Buffer water tank; 3. Water supply pump; 4. Anti-backflow valve; 5. Cooling tower; 51. First upper liquid level port; 52. First lower liquid level port; 6. Raw water tank; 61. Second upper liquid level port; 62. Second lower liquid level port; 7. Control component; 8. Exhaust port; 9. Drain port; 10. Overflow port; 11. Liquid level sensor; 12. Greening domestic water pipe; 13. Municipal drinking water pipe; 14. Branch pipe water meter; 15. Main pipe water meter. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] See also Figure 1-Figure 2 , provides an electrically controlled purified water primary concentrate recovery and reuse system, comprising a reverse osmosis water making device 1, a buffer water tank 2, a water supply pump 3, an anti-backflow valve 4, a cooling tower 5 and a raw water tank 6; the raw water tank 6 transports raw water to the reverse osmosis water making device 1, the reverse osmosis water making device 1 discharges concentrate, and the concentrate flows through the buffer water tank 2, the water supply pump 3 and the anti-backflow valve 4 in sequence, the anti-backflow valve 4 transports the concentrate to the cooling tower 5 and the raw water tank 6 respectively; the water supply pump 3 is electrically connected to a control component 7.

[0017] In the description of the present invention, an exhaust port 8 is provided at the top of the cache water tank 2, an emptying port 9 is provided at the bottom of the cache water tank 2, and an overflow port 10 is provided at the top of one side of the cache water tank 2. The emptying port 9 is connected to the overflow port 10 by a pipeline, and the wastewater in the cache water tank 2 is discharged to the sewage treatment, thereby providing a buffer for the recovery of concentrated water, ensuring that the system can run smoothly, and avoiding overflow or system collapse due to excessive concentrated water.

[0018] In the description of the present invention, a liquid level sensor 11 is provided on the top of the side of the cache water tank 2 away from the overflow port 10, and two monitoring pipes are inserted into the cache water tank 2 from the bottom of the liquid level sensor 11 to monitor the low liquid level and the high liquid level inside the cache water tank 2 respectively. Thus, by monitoring the low liquid level and the high liquid level, the control component can start or stop the reflux process of the concentrated water as needed to prevent the concentrated water from overflowing or lacking water.

[0019] In the description of the present invention, a first upper liquid level port 51 and a first lower liquid level port 52 are arranged inside the cooling tower 5, and the height of the first upper liquid level port 51 is greater than the height of the first lower liquid level port 52. A second upper liquid level port 61 and a second lower liquid level port 62 are arranged inside the raw water tank 6, and the height of the second upper liquid level port 61 is greater than the height of the second lower liquid level port 62, thereby ensuring the safe operation of the system and preventing any pollution source from flowing back into the purified water and the raw water.

[0020] In the description of the present invention, the first upper liquid level port 51 and the second upper liquid level port 61 are both connected to the anti-backflow valve 4, and maintain a three-way connection with the greening domestic water pipe 12; the first lower liquid level port 52 and the second lower liquid level port 62 are both connected to the municipal drinking water pipe 13, and the water pipe branches where the first upper liquid level port 51, the first lower liquid level port 52, the second upper liquid level port 61 and the second lower liquid level port 62 are located are all equipped with branch water meters 14, and the greening domestic water pipe 12 is equipped with a main water meter 15. The branch water meters 14 are all electrically connected to the control component 7, and the control component 7 is electrically connected to the liquid level sensor 11, so as to monitor the water flow in real time, help the control component to perform electrical adjustment, realize automatic control, and adjust the water flow and water level according to actual needs to ensure system efficiency and stability.

[0021] In the description of the present invention, Figure 2 As shown, the control component 7 includes: a frequency converter, a pneumatic valve, a liquid level relay, a circuit breaker, a water pump motor, a control power supply and a probe.

[0022] The frequency converter is used to adjust the rotation speed of the water supply pump 3 and control the water flow and water pressure.

[0023] Pneumatic valve, used to control the on / off or flow regulation of circulating water circuit.

[0024] The liquid level relay is used to obtain the water level signal of the liquid level sensor 11. When the water level reaches the set high liquid level or low liquid level, the contact state is changed to control the start and stop of the water supply pump 3.

[0025] Circuit breakers are used for short circuit protection and overload protection to maintain safe operation.

[0026] The water pump motor is used to connect and control the water pump 3, provide a power source for the water circulation flow, convert electrical energy into mechanical energy, and realize water transportation.

[0027] Control power supply, used to provide working voltage for water circulation, transportation and detection.

[0028] The probe is used to provide a high liquid level probe and a low liquid level probe, and cooperates with the liquid level sensor 11 to detect water level changes and convert them into electrical signals to be transmitted to the liquid level relay.

[0029] In the description of the present invention, the incoming line of the control power supply is connected to the input end of the circuit breaker, the output end of the circuit breaker is connected to the input end of the frequency converter, and the output end of the frequency converter is connected to the three-phase winding of the water pump motor; the control component 7 is protected by the circuit breaker.

[0030] Specifically, the control power supply provides the power required by various control devices, sensors, actuators and other components in the system. The control power supply is a stable DC power supply or AC power supply that can provide the voltage and current required by each control element. The input end of the control power supply is connected to the power supply system or distribution power supply to deliver power to the input end of the circuit breaker.

[0031] Circuit breakers are electrical devices used for overload and short circuit protection. They can automatically cut off the power supply. When a system fault occurs (such as overload, short circuit or electrical abnormality), the circuit breaker will quickly disconnect the circuit to protect the entire control system from damage. The power line of the control power supply is connected to the input of the circuit breaker, and the output of the circuit breaker is connected to the input of the inverter, ensuring that power can continue to be transmitted to the inverter only when there is no fault in the circuit. In the event of an electrical overload or short circuit, the protection mechanism of the circuit breaker will quickly cut off the power supply to prevent electrical equipment (such as the inverter and the pump motor) from being damaged due to excessive current.

[0032] The inverter is used to control the speed of the water pump motor driving the water pump 3, thereby adjusting the water flow and water pressure. In this system, the inverter dynamically adjusts the output frequency according to the control signal (from the liquid level relay or PLC), thereby adjusting the speed of the water pump motor. The inverter can not only achieve speed control, but also improve the efficiency of electric energy use and reduce energy consumption. The inverter changes the speed of the motor by changing the frequency and voltage of the alternating current. By using high-frequency current and internal power electronics, the inverter converts the input fixed-frequency current into current of the required frequency. The input end of the inverter is connected to the output end of the circuit breaker to ensure that the inverter can only receive power and start working when the circuit is safe and there is no fault. The output end of the inverter is connected to the three-phase winding of the water pump motor, and the motor speed is adjusted by controlling the frequency and amplitude of each phase current.

[0033] The water pump motor is the core part that provides power to the water pump 3, and is usually a three-phase AC motor. In this system, the speed and flow of the water pump motor are adjusted by the frequency converter, and it is started, stopped or speed-regulated according to the control requirements of the liquid level relay or PLC. The water pump motor is a three-phase asynchronous motor, and the three-phase windings receive three-phase AC signals from the frequency converter respectively. By adjusting the frequency and voltage of the three-phase current, the speed of the water pump motor can be accurately controlled.

[0034] In addition, the pneumatic valve is controlled by the solenoid valve, the power supply of the solenoid valve is taken from the control power supply, and the control signal of the solenoid valve is given by the PLC programmable logic controller according to the process requirements. For example, when it is necessary to control the flow of water or switch the water circuit at a specific water level, the control circuit outputs a signal to control the solenoid valve to gain or lose power, thereby controlling the opening or on / off of the pneumatic valve.

[0035] Control circuit connection: The power supply end of the liquid level relay is connected to the control power supply. The high liquid level contact of the liquid level relay (normally closed or normally open, determined according to the control logic) is connected to the start and stop control end of the inverter (such as the forward start terminal, stop terminal, etc. of the inverter). When the water level rises to the high liquid level, the high liquid level contact of the liquid level relay will act and send a signal to the inverter to stop the inverter output and the water pump motor will stop running. Similarly, the low liquid level contact of the liquid level relay (normally closed or normally open) is connected to the start control end of the inverter. When the water level drops to the low liquid level, the low liquid level contact will act, triggering the inverter to start, and the water pump motor will start running, driving the water feed pump 3 to realize the circulation of concentrated water.

[0036] The present invention is described below in conjunction with specific embodiments, and is mainly composed of the following parts: Reverse osmosis water making equipment 1: used to purify water, produce concentrated water and clean water.

[0037] Cache water tank 2: used to temporarily store the concentrated water and provide a buffering effect.

[0038] Feed water pump 3: Sends concentrated water to subsequent treatment or recovery system.

[0039] Anti-backflow valve 4: prevent water from flowing back and ensure the safe operation of the system.

[0040] Cooling tower 5: used to cool the recovered concentrated water or hot water generated during the water treatment process.

[0041] Raw water tank 6: stores raw water to be treated and supplies the reverse osmosis water making equipment.

[0042] The present invention monitors and regulates water flow through electrical control components, so that the concentrated water produced by the reverse osmosis equipment can be effectively recycled without waste. This is mainly achieved through the following steps: 1. Concentrated water return: The concentrated water discharged from the reverse osmosis water production equipment 1 first flows through the buffer water tank 2. After storage and monitoring, the concentrated water is sent to the cooling tower 5 or re-transported back to the raw water tank 6 through the water supply pump 3. The anti-backflow valve 4 ensures that the concentrated water does not flow back to the raw water tank to avoid contamination.

[0043] 2. Liquid level monitoring: The liquid level sensor 11 monitors the water level of the cache water tank 2 in real time. When the water level is too high or too low, the control component 7 will make corresponding adjustments to ensure stable operation of the system.

[0044] 3. Water quality and flow control: By configuring the branch pipe water meter 14 and the main pipe water meter 15, the control component 7 can monitor the water flow in real time and make appropriate adjustments to ensure accurate management under different water levels and demands.

[0045] The specific operating principle of the present invention is as follows: reverse osmosis directly discharges concentrated water (recycled water, water quality close to the drinking water standard) into the cache water tank 2. After the high liquid level signal of the cache water tank 2 is triggered, the feed water pump 3 starts to run according to a given frequency. In addition to the intermittent water used for greening and daily life, the water supplements the evaporation and / or floating water (if any) of the cooling tower 5 and the raw water tank 6 of the water production equipment. Among them, the cooling tower 5 and the raw water tank 6 are respectively provided with a first upper liquid level port 51 and a second upper liquid level port 61 for liquid level supplementation, and the recycled recycled water is used first. The insufficient part is respectively provided with a first lower liquid level port 52 and a second lower liquid level port 62 for drinking water. A backflow prevention device is set at the outlet of the feed water pump 3 to automatically prevent the water flow in the pipe from backflowing into the cache water tank 2 and prevent the phenomenon of pipeline backflow. The cache water tank 2 is provided with an emptying port 9 for maintenance and cleaning, an exhaust port 8 for preventing air pressure damage, and an overflow port 10 for preventing excessive liquid level.

[0046] To sum up, with the help of the above-mentioned technical scheme of the present invention, starting from the concepts of clean production and recycling, studying the optimal combination of similar processes such as recycling and reuse of reclaimed water and production water use, effectively utilizing water resources, and improving the recycling rate of water, the important measure of reducing resource consumption will be implemented, achieving a win-win situation of corporate benefits and social benefits; the present invention is combined with different application sites to fully realize the goals of zero energy surplus, zero emissions, and zero waste.

[0047] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

Claims

1. An electrically controlled purified water primary concentrated water recycling system, characterized in that: It comprises a reverse osmosis water production device (1), a buffer water tank (2), a water supply pump (3), an anti-backflow valve (4), a cooling tower (5) and a raw water tank (6); The raw water tank (6) delivers raw water to the reverse osmosis water production equipment (1); the reverse osmosis water production equipment (1) discharges concentrated water, and the concentrated water flows through the buffer water tank (2), the water supply pump (3) and the anti-backflow valve (4) in sequence; the anti-backflow valve (4) delivers the concentrated water to the cooling tower (5) and the raw water tank (6) respectively; The water supply pump (3) is electrically connected to a control component (7).

2. The electrically controlled purified water primary concentrated water recycling system according to claim 1, characterized in that: The top of the cache water tank (2) is provided with an exhaust port (8), the bottom of the cache water tank (2) is provided with an emptying port (9), and the top of one side of the cache water tank (2) is provided with an overflow port (10), the emptying port (9) and the overflow port (10) are connected by a pipe, and waste water in the cache water tank (2) is discharged to sewage treatment.

3. The electrically controlled purified water primary concentrated water recycling system according to claim 2, characterized in that: A liquid level sensor (11) is provided at the top of the side of the cache water tank (2) away from the overflow port (10), and two monitoring pipes are inserted into the cache water tank (2) from the bottom of the liquid level sensor (11) to respectively monitor the low liquid level and the high liquid level inside the cache water tank (2).

4. The electrically controlled purified water primary concentrated water recycling system according to claim 3, characterized in that: A first upper liquid level port (51) and a first lower liquid level port (52) are provided inside the cooling tower (5), and the height of the first upper liquid level port (51) is greater than the height of the first lower liquid level port (52).

5. The electrically controlled purified water primary concentrated water recycling system according to claim 4, characterized in that: A second upper liquid level port (61) and a second lower liquid level port (62) are provided inside the raw water tank (6), and the height of the second upper liquid level port (61) is greater than the height of the second lower liquid level port (62).

6. The electrically controlled purified water primary concentrated water recycling system according to claim 5, characterized in that: The first upper liquid level port (51) and the second upper liquid level port (61) are both connected to the anti-backflow valve (4), and are three-way connected to the greening domestic water pipe (12); The first lower liquid level port (52) and the second lower liquid level port (62) are both connected to a municipal drinking water pipe (13).

7. The electrically controlled purified water primary concentrated water recycling system according to claim 6, characterized in that: The water pipe branches where the first upper liquid level port (51), the first lower liquid level port (52), the second upper liquid level port (61) and the second lower liquid level port (62) are located are all provided with branch pipe water meters (14), and the greening domestic water pipe (12) is provided with a main pipe water meter (15).

8. The electrically controlled purified water primary concentrated water recycling system according to claim 7, characterized in that: The branch pipe water meters (14) are all electrically connected to the control component (7), and the control component (7) is electrically connected to the liquid level sensor (11).

9. The electrically controlled purified water primary concentrated water recycling and reuse system according to claim 1, characterized in that: The control component (7) includes: a frequency converter, a pneumatic valve, a liquid level relay, a circuit breaker, a water pump motor, a control power supply and a probe; The frequency converter is used to adjust the rotation speed of the water supply pump (3) and control the water flow and water pressure; The pneumatic valve is used to control the on / off or flow rate of the circulating water circuit; The liquid level relay is used to obtain a water level signal from a liquid level sensor (11), and when the water level reaches a set high liquid level or a set low liquid level, the contact state is changed to control the start and stop of the water supply pump (3); The circuit breaker is used for short circuit protection and overload protection to maintain safe operation; The water pump motor is used to connect to and control the water supply pump (3), provide a power source for the water circulation flow, convert electrical energy into mechanical energy, and realize water transportation; The control power supply is used to provide working voltage for water circulation, transportation and detection; The probe is used to provide a high liquid level probe and a low liquid level probe, and cooperates with the liquid level sensor (11) to detect water level changes and convert them into electrical signals to be transmitted to the liquid level relay.

10. The electrically controlled purified water primary concentrated water recycling system according to claim 9, characterized in that: The incoming line of the control power supply is connected to the input end of the circuit breaker, the output end of the circuit breaker is connected to the input end of the frequency converter, and the output end of the frequency converter is connected to the three-phase winding of the water pump motor; The control component (7) is protected by the circuit breaker.

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