Nanofiltration water treatment system

Abstract

This utility model discloses a nanofiltration water treatment system, including a controller, basic pipelines, and a raw water electric valve, a raw water tank, a raw water pump, a recycled water electric valve, a pretreatment tank, a softening resin tank, a security filter, an inlet electric valve, a high-pressure pump, a nanofiltration membrane device, a purified water tank, a purified water pump, and a water supply pipeline arranged sequentially on the basic pipelines. The purified water tank is equipped with a water quality sensor. A first connecting pipe with a return water flushing electric valve is provided between the outlet of the nanofiltration membrane device and the raw water tank. A second connecting pipe with a first electric regulating valve and a hollow nanofiltration membrane is provided between the purified water tank and the pretreatment tank. A third connecting pipe with a second electric regulating valve and a pressure reducing valve is provided between the recycled water electric valve and the basic pipeline near the downstream side of the purified water pump. This utility model can achieve the mixing of finely filtered water and primary filtered water within the purified water tank, thereby allowing the system to adjust the quality of the final output water flow and avoiding potential health risks to users from long-term use of highly purified water.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a nanofiltration water treatment system. Background Technology

[0002] With the improvement of living standards and health requirements, a variety of drinking water filtration and treatment equipment has emerged. It can now achieve secondary treatment of municipal tap water before it enters the household and meet the supply requirements of high-standard drinking water. However, existing filtration and treatment equipment does not have the function of adjusting water quality on demand. It can only output very pure water. Long-term consumption of such water is detrimental to health. Therefore, this paper proposes a water filtration and treatment system that can control the output water quality. Utility Model Content

[0003] In view of the problems existing in the background art, the purpose of this utility model is to provide a nanofiltration water treatment system, which effectively solves the problems existing in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The nanofiltration water treatment system includes a controller, a basic pipeline, and, sequentially arranged from upstream to downstream on the basic pipeline, a raw water electric valve, a raw water tank, a raw water pump, a recycled water electric valve, a pretreatment tank, a softening resin tank, a security filter, an inlet electric valve, a high-pressure pump, a nanofiltration membrane device, a purified water tank, a purified water pump, and a water supply pipeline. The purified water tank is equipped with a water quality sensor, and a return water pipeline is located downstream of the water supply pipeline. The outlet end of the return water pipeline is connected to the purified water tank.

[0006] A first connecting pipe is provided between the outlet of the nanofiltration membrane device and the raw water tank, and a return water flushing electric valve is provided on the first connecting pipe.

[0007] A second connecting pipe is provided between the water purification tank and the pretreatment tank, and a first electric regulating valve and a hollow nanofiltration membrane are provided on the second connecting pipe.

[0008] A third connecting pipe is provided between the regenerated water electric valve and the basic pipeline near the downstream side of the purified water pump. A second electric regulating valve and a pressure reducing valve are installed on the third connecting pipe.

[0009] The controller is electrically connected to the raw water electric valve, the raw water pump, the reprocessed water electric valve, the inlet electric valve, the purified water pump, the water quality sensor, the return water flushing electric valve, the first electric regulating valve, and the second electric regulating valve.

[0010] Furthermore, the pretreatment tank includes a first activated carbon tank and a multi-media tank located upstream of the first activated carbon tank, and the second connecting pipe is connected to the first activated carbon tank.

[0011] Furthermore, the multi-media tank is a quartz sand filter tank.

[0012] Furthermore, the security filter is also connected to a scale inhibitor dosing pump.

[0013] Furthermore, the high-pressure pump is electrically connected to a low-pressure switch and a high-pressure switch, with the low-pressure switch located upstream of the high-pressure pump and the high-pressure switch located downstream of the high-pressure pump.

[0014] Furthermore, a second activated carbon tank is also installed on the basic pipeline between the nanofiltration membrane device and the water purification tank.

[0015] Furthermore, an ultraviolet processor is also installed on the basic pipeline between the water purification tank and the water purification pump.

[0016] Furthermore, the water purification tank is equipped with an ozone injector, and an ozone circulation pipeline is also provided between the ozone injector and the basic pipeline near the outlet of the water purification pump. The ozone circulation pipeline is equipped with a third electric regulating valve and a pressure reducing valve. The ozone injector is also connected to an ozone supply line. The third electric regulating valve is electrically connected to the controller.

[0017] Furthermore, the return water pipeline is equipped with a fourth electric regulating valve, a pressure sensor, and a precision filter in sequence from upstream to downstream. The fourth electric regulating valve and the pressure sensor are electrically connected to the controller.

[0018] Furthermore, the raw water tank and the purified water tank are respectively equipped with liquid level and pressure sensors that are electrically connected to the controller.

[0019] This utility model has the following beneficial technical effects:

[0020] This invention enables the mixing of finely filtered water and primary filtered water within a water purification tank, thereby allowing the system to adjust the quality of the final output water flow. This avoids potential health risks to users from long-term use of highly purified water. Compared with existing technologies, this application features a novel design, is safe and convenient to use, and has strong practicality. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figure 1 As shown, the nanofiltration water treatment system described in this embodiment includes a controller, a basic pipeline 1, and, sequentially arranged from upstream to downstream on the basic pipeline 1, a raw water electric valve 2, a raw water tank 3, a raw water pump 4, a recycled water electric valve 5, a pretreatment tank, a softening resin tank 6, a security filter 7, an inlet electric valve 8, a high-pressure pump 9, a nanofiltration membrane device 10, a purified water tank 11, a purified water pump 12, and a water supply pipeline 13. A water quality sensor 14, which is a TDS sensor, is installed on the purified water tank 11. A brine tank 15 is installed at the softening resin tank 6. The connection and assembly relationship and working principle of the softening resin tank 6 and the brine tank 15 are existing technologies in the field and will not be described further here.

[0025] The water supply pipeline 13 is connected to multiple user ports in parallel. Downstream of the water supply pipeline 13, there is also a return water pipeline 16. The outlet end of the return water pipeline 16 is connected to the water purification tank 11. The return water pipeline 16 can realize the circulation of water flow and avoid water from accumulating in one place for a long time.

[0026] A first connecting pipe 17 is provided between the outlet of the nanofiltration membrane device 10 and the raw water tank 3. A return water flushing electric valve 18 is provided on the first connecting pipe 17, and the return water flushing of the raw water tank 3 can be controlled through the first connecting pipe 17. Preferably, the return water flushing electric valve 18 is opened for a predetermined time according to a preset time period and flow rate, and then returns to the initial set opening degree. A concentrate discharge pipe 19 is also connected to the nanofiltration membrane device 10. A manual valve 20 is provided on the concentrate discharge pipe 19, which can periodically discharge concentrate manually.

[0027] A second connecting pipe 21 is provided between the water purification tank 11 and the pretreatment tank. The second connecting pipe 21 is equipped with a first electric regulating valve 22 and a hollow nanofiltration membrane 23. The hollow nanofiltration membrane 23 is selected with a filtration accuracy of no more than 10 nanometers, and the nanofiltration membrane device 10 is selected with a filtration accuracy of no more than 2 nanometers. The coarse and fine filters are matched. In addition, the water flow that has passed through the pretreatment tank but has not passed through the softening resin tank 6 can be controlled and directly added into the water purification tank 11 through the second connecting pipe 21. This can also achieve coarse adjustment of the water quality in the water purification tank 11 and avoid the potential health risks to users from long-term use of highly purified water.

[0028] A third connecting pipe 24 is provided between the re-water electric valve 5 and the basic pipeline 1 near the downstream side of the water purification pump 12. A second electric regulating valve 25 and a pressure reducing valve are provided on the third connecting pipe 24. The water flow in the water purification tank 11 can be recycled and filtered through the third connecting pipe 24. Preferably, the third connecting pipe 24 is set to be connected for a certain period of time.

[0029] The preferred controller is a PLC controller, which is electrically connected to the raw water electric valve 2, the raw water pump 4, the recycled water electric valve 5, the inlet water electric valve 8, the purified water pump 12, the water quality sensor 14, the return water flushing electric valve 18, the first electric regulating valve 22, and the second electric regulating valve 25.

[0030] The pretreatment tank includes a first activated carbon tank 26 and a multi-media tank 27 located upstream of the first activated carbon tank 26. A second connecting pipe 21 is connected to the first activated carbon tank 26. The multi-media tank 27 is a quartz sand filter tank.

[0031] The security filter 7 is also connected to an antiscalant dosing pump 28. The antiscalant dosing pump 28 is electrically connected to the controller and synchronized with the system's water production operation. For example, when water production stops for a certain number of minutes, the antiscalant dosing pump 28 operates synchronously.

[0032] The high-pressure pump 9 is electrically connected to a low-pressure switch 29 and a high-pressure switch 30. The low-pressure switch 29 is located upstream of the high-pressure pump 9, and the high-pressure switch 30 is located downstream of the high-pressure pump 9. When the pressure in the basic pipeline 2 is low, the low-pressure switch 29 is triggered, and the high-pressure pump 9 operates to pressurize and ensure the water flow pressure. When the water flow pressure reaches the limit, the high-pressure switch 30 is triggered, and the high-pressure pump 9 stops operating.

[0033] A second activated carbon tank 31 is also installed on the basic pipeline 1 between the nanofiltration membrane device 10 and the water purification tank 11. The second activated carbon tank 31 performs secondary activated carbon filtration on the water flow, which helps to improve the taste of drinking water. An ultraviolet processor 32 is also installed on the basic pipeline 1 between the water purification tank 11 and the water purification pump 12. The ultraviolet processor 32 operates in conjunction with the water purification pump 12 and is responsible for disinfecting and sterilizing the water flow upstream of the water purification pump 12.

[0034] An ozone injector 33 is installed on the water purification tank 11. An ozone circulation pipeline 34 is also installed between the ozone injector 33 and the basic pipeline 1 near the outlet of the water purification pump 12. The ozone circulation pipeline 34 is equipped with a third electric regulating valve 35 and a pressure reducing valve. The ozone injector 33 is also connected to an ozone supply line. The third electric regulating valve 35 is electrically connected to the controller. The ozone gas delivered by the ozone injector 33 is sprayed into the water purification tank 11 to form ozone bubble water. With the opening of the third connecting pipe 24, the ozone bubble water can be extracted and sent to the first activated carbon tank 26 and the second activated carbon tank 31. The ozone bubbles can not only purify harmful substances, but also oxidize and activate the biological activated carbon, restoring its activity. Liquid level and pressure sensors 36 electrically connected to the controller are respectively installed in the raw water tank 3 and the purified water tank 11. With the controller and various valves, the water level in the purified water tank 11 and the raw water tank 3 can be automatically controlled.

[0035] The return water pipeline 16 is equipped with a fourth electric regulating valve 37, a pressure sensor 38 and a precision filter 39 in sequence from upstream to downstream. The fourth electric regulating valve 37 and the pressure sensor 38 are electrically connected to the controller.

[0036] This embodiment achieves the mixing of finely filtered water and primary filtered water within the water purification tank 11 through the second connecting pipe 21, thereby allowing the system to adjust the quality of the final output water flow and avoiding potential health risks to users from long-term use of highly purified water. Compared with the prior art, this embodiment has a novel design, is safe and convenient to use, and has strong practicality.

[0037] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A nanofiltration water treatment system, characterized in that, The system includes a controller, a basic pipeline, and, sequentially arranged from upstream to downstream, a raw water electric valve, a raw water tank, a raw water pump, a recycled water electric valve, a pretreatment tank, a softening resin tank, a security filter, an inlet electric valve, a high-pressure pump, a nanofiltration membrane device, a purified water tank, a purified water pump, and a water supply pipeline. The purified water tank is equipped with a water quality sensor, and a return water pipeline is located downstream of the water supply pipeline. The outlet end of the return water pipeline is connected to the purified water tank. A first connecting pipe is provided between the outlet of the nanofiltration membrane device and the raw water tank, and a return water flushing electric valve is provided on the first connecting pipe. A second connecting pipe is provided between the water purification tank and the pretreatment tank, and a first electric regulating valve and a hollow nanofiltration membrane are provided on the second connecting pipe. A third connecting pipe is provided between the regenerated water electric valve and the basic pipeline near the downstream side of the purified water pump, and a second electric regulating valve and a pressure reducing valve are provided on the third connecting pipe. The controller is electrically connected to the raw water electric valve, the raw water pump, the reprocessed water electric valve, the inlet electric valve, the purified water pump, the water quality sensor, the return water flushing electric valve, the first electric regulating valve, and the second electric regulating valve.

2. The nanofiltration water treatment system according to claim 1, characterized in that, The pretreatment tank includes a first activated carbon tank and a multi-media tank located upstream of the first activated carbon tank, and the second connecting pipe is connected to the first activated carbon tank.

3. The nanofiltration water treatment system according to claim 2, characterized in that, The multi-media tank is a quartz sand filter tank.

4. The nanofiltration water treatment system according to claim 1, characterized in that, The security filter is also connected to a scale inhibitor dosing pump.

5. The nanofiltration water treatment system according to claim 1, characterized in that, The high-pressure pump is electrically connected to a low-pressure switch and a high-pressure switch. The low-pressure switch is located upstream of the high-pressure pump, and the high-pressure switch is located downstream of the high-pressure pump.

6. The nanofiltration water treatment system according to claim 1, characterized in that, A second activated carbon tank is also installed on the basic pipeline between the nanofiltration membrane device and the water purification tank.

7. The nanofiltration water treatment system according to claim 1, characterized in that, An ultraviolet processor is also installed on the basic pipeline between the water purification tank and the water purification pump.

8. The nanofiltration water treatment system according to claim 1, characterized in that, An ozone injector is installed on the water purification tank. An ozone circulation pipeline is also installed between the ozone injector and the basic pipeline near the outlet of the water purification pump. A third electric regulating valve and a pressure reducing valve are installed on the ozone circulation pipeline. The ozone injector is also connected to an ozone supply line. The third electric regulating valve is electrically connected to the controller.

9. The nanofiltration water treatment system according to claim 1, characterized in that, The return water pipeline is equipped with a fourth electric regulating valve, a pressure sensor, and a precision filter in sequence from upstream to downstream. The fourth electric regulating valve and the pressure sensor are electrically connected to the controller.

10. The nanofiltration water treatment system according to claim 1, characterized in that, The raw water tank and the purified water tank are each equipped with a liquid level and pressure sensor that is electrically connected to the controller.

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