CN204310876U - Reverse osmosis system and water purifier - Google Patents

Abstract

The utility model discloses a reverse osmosis system and a water purifier, relates to the technical field of reverse osmosis water treatment, and is designed for solving the problems of low waste water recovery rate and short service life of the reverse osmosis membrane in the existing reverse osmosis system. The reverse osmosis system includes a pretreatment unit, a control device, a pressure regulating device, a reverse osmosis filtration device, a post-treatment unit and a return unit respectively connected to the reverse osmosis filtration device, the return unit, the pressure regulation device and the reverse osmosis filtration The device constitutes a secondary treatment cycle system, the return unit is connected with the flushing system, and the post-treatment unit is connected with the water storage device. Also disclosed is a water purifier with the reverse osmosis system. The utility model mixes the concentrated water purified by the reverse osmosis filter device through the reflux unit and the water treated by the pretreatment unit, and then undergoes secondary treatment through the reverse osmosis filter device, which not only improves the recovery rate of waste water in the system, saves water and energy, but also The service life of the reverse osmosis filter device is extended.

Description

A reverse osmosis system and water purifier

technical field

The utility model relates to the technical field of reverse osmosis water treatment, in particular to a reverse osmosis system and a water purifier with the reverse osmosis system.

Background technique

At present, the reverse osmosis system generally has a pretreatment device, a booster device and a reverse osmosis membrane filtration device. After the raw water passes through the reverse osmosis membrane filtration device, it will be divided into purified water and concentrated water. The ratio of purified water to waste water in the existing reverse osmosis system is about 1:3, and the recovery rate is about 25%. Some systems on the market use concentrated water backflow to directly lead the concentrated water back to the raw water branch road, which can improve the recovery rate. Since the concentrated water is concentrated raw water, its TDS value is very high, which will increase the concentration polarization of the reverse osmosis membrane. Phenomenon, the pollution rate of reverse osmosis membrane is relatively accelerated, and the service life is shortened sharply.

Utility model content

One purpose of the utility model is to propose a reverse osmosis system that has a simple structure, improves the recovery rate of waste water in the system, prolongs the service life of the reverse osmosis filter device, and saves energy and reduces emissions.

Another purpose of the utility model is to propose a water purifier with high recovery rate of waste water, long service life, water saving and energy saving.

For this purpose, the utility model adopts the following technical solutions:

The utility model provides a reverse osmosis system, which comprises a pretreatment unit, a pressure regulating device and a reverse osmosis filtering device which are sequentially connected through pipelines, and also includes a control unit connected between the pretreatment unit and the pressure regulating device. device, a post-processing unit and a reflux unit respectively connected to the reverse osmosis filter device, the reflux unit, the pressure regulating device and the reverse osmosis filter device constitute a secondary treatment circulation system, and the reflux unit is also connected with the flushing The system is connected, and the aftertreatment unit is also connected with the water storage device.

Further, the control device includes a water inlet solenoid valve and a flow meter for recording the total amount of water flow, the input end of the flow meter communicates with the output end of the water inlet solenoid valve through a pipeline, and the output end of the flow meter communicates with the output end of the water inlet solenoid valve through a pipe The road is connected with the pressure regulating device.

Further, the pressure regulating device includes a pressure stabilizing pump and a booster pump, the input end of the pressure stabilizing pump communicates with the output end of the flowmeter through a pipeline, and the output end of the booster pump communicates with the output end of the flowmeter through a pipeline. The input end of the pressure stabilizing pump is communicated with the output end of the flowmeter, the output end of the pressure stabilizing pump is communicated with the input end of the reverse osmosis filter device through a pipeline, and the input end of the booster pump is connected through a pipeline. The pipeline communicates with the output end of the return unit.

Further, the output end of the reverse osmosis filter device includes a pure water outlet and a concentrated water outlet, the concentrated water outlet communicates with the input end of the return unit through a pipeline, and the pure water outlet communicates with the The input end of the post-processing unit is connected, and a check valve for preventing backflow of water in the pipeline is provided on the pipeline connecting the reverse osmosis filter device and the post-processing unit.

Further, the water storage device communicates with the input end of the post-treatment unit and the pure water outlet of the reverse osmosis filter device through pipelines, and the water storage device is connected with the post-treatment unit and the reverse osmosis filter device. The connecting pipeline of the device is equipped with a high-pressure switch for detecting the water pressure on the pipeline;

The control device also includes a controller, the controller is respectively connected with the high pressure switch, the water inlet solenoid valve and the pressure stabilizing pump, and the controller can adjust the pressure according to the water pressure value detected by the high pressure switch. Control the opening or closing of the water inlet solenoid valve, and the operation or stop of the pressure stabilizing pump.

Further, the flushing system includes a flushing solenoid valve and a waste water proportional device connected in parallel, and the input ends of the flushing solenoid valve and the waste water proportional device are respectively communicated with the output port of the return unit through pipelines.

Further, the pretreatment unit includes a PP cotton filter element, an activated carbon filter element and a carbon rod filter element connected in series in sequence, the input end of the PP cotton filter element communicates with the raw water port through a pipeline, and the output end of the carbon rod filter element passes through a pipeline It communicates with the input end of the water inlet solenoid valve.

Further, the reverse osmosis filtration device is a reverse osmosis membrane filter element, and the reflux unit is a nanofiltration membrane filter element.

Further, the post-processing unit is a composite filter element, and the composite filter element is made of carbon rods and ultrafiltration membrane filter materials.

The utility model also provides a water purifier, the water purifier has the reverse osmosis system in the above solution.

The beneficial effects of the utility model are:

The utility model provides a reverse osmosis system. After the concentrated water produced by the reverse osmosis filter device is filtered and treated by the reflux unit, it is introduced into the pretreated water channel through the pressure regulating device and mixed with the water treated by the pretreatment unit. , and again through the reverse osmosis filter device for secondary treatment. The utility model has a simple structure, which not only effectively improves the waste water recovery rate of the system, but also greatly reduces the concentration polarization phenomenon of the reverse osmosis membrane surface of the reverse osmosis filter device. Pollution prolongs the service life of the reverse osmosis filter.

The utility model also provides a water purifier with the above-mentioned reverse osmosis system, which improves the recovery rate of waste water, saves water and energy, and has a long service life.

Description of drawings

Fig. 1 is a schematic structural diagram of a reverse osmosis system provided by Embodiment 1 of the present invention.

In the figure, 1. Pretreatment unit; 11. PP cotton filter element; 12. Activated carbon filter element; 13. Carbon rod filter element; 2. Pressure regulating device; 21. Regulator pump; 22. Booster pump; 3. Reverse osmosis filter device ;4, control device; 41, water inlet solenoid valve; 42, flow meter; 5, post-processing unit; 6, return unit; 7, flushing system; 71, flushing solenoid valve; device; 9. High pressure switch; 10. Check valve.

Detailed ways

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

Embodiment one:

This embodiment provides a reverse osmosis system. The structure of the reverse osmosis system is shown in Figure 1, which includes a pretreatment unit 1, a pressure regulating device 2, a reverse osmosis filter device 3, and a pretreatment unit connected in sequence through pipelines. The control device 4 between the processing unit 1 and the pressure regulating device 2, the post-processing unit 5 and the reflux unit 6 respectively connected to the reverse osmosis filtering device 3, the reflux unit 6, the pressure regulating device 2 and the reverse osmosis filtering device 3 constitute a secondary To treat the circulation system, the return unit 6 is also connected to the flushing system 7 , and the post-treatment unit 5 is also connected to the water storage device 8 . Wherein, the reverse osmosis filter device 3 adopts a reverse osmosis membrane filter element, and the backflow unit 6 adopts a nanofiltration membrane filter element.

In this reverse osmosis system, the pretreatment unit 1 includes a PP cotton filter element 11, an activated carbon filter element 12 and a carbon rod filter element 13 connected in series in sequence. The end communicates with the input end of the water inlet solenoid valve 41 of the control device 4 through a pipeline.

The control device 4 includes a water inlet solenoid valve 41 and a flow meter 42 arranged on the pipeline. The input end of the flow meter 42 communicates with the output end of the water inlet solenoid valve 41 through the pipeline, and its output end communicates with the pressure regulating device 2 through the pipeline. connect. When the system is not used for water production, the water inlet solenoid valve 41 is in a normally closed state; when water is produced, the water inlet solenoid valve 41 is in an open state. The flow meter 42 is used to record the total amount of water flow, so as to achieve the purpose of reminding the life of each water purification unit.

The pressure regulating device 2 includes a stabilizing pump 21 and a booster pump 22 arranged on the pipeline, the input end of the stabilizing pump 21 communicates with the output end of the flowmeter 42 through the pipeline, and the output end of the booster pump 22 communicates with the output end of the flowmeter 42 through the pipeline. The input end of the pressure stabilizing pump 21 and the output end of the flowmeter 42 are connected, the output end of the pressure stabilizing pump 21 is connected with the input end of the reverse osmosis filter device 3 through the pipeline, and the input end of the booster pump 22 is connected with the return unit through the pipeline The output of 6 is connected.

The output end of the reverse osmosis filter device 3 includes a pure water outlet and a concentrated water outlet, the concentrated water outlet is communicated with the input end of the reflux unit 6 through a pipeline, the pure water outlet is communicated with the input end of the post-processing unit 5 through a pipeline, and connected reversely. A non-return valve 10 is provided on the pipeline between the permeation filter device 3 and the post-processing unit 5 to prevent the water in the pipeline from flowing back.

The water storage device 8 communicates with the input end of the post-processing unit 5 and the pure water outlet of the reverse osmosis filter device 3 through pipelines, and a high-pressure switch is arranged on the connecting pipeline between the water storage device 8 and the post-treatment unit 5 and the reverse osmosis filter device 3 9. The high pressure switch 9 is used to detect the water pressure on the pipeline where it is located.

The control device 4 also includes a controller (not shown in the figure), the controller is respectively connected with the high pressure switch 9, the water inlet solenoid valve 41 and the pressure stabilizing pump 21, and the controller can control the water pressure value detected by the high pressure switch 9 to The water solenoid valve 41 is opened or closed, and the pressure stabilizing pump 21 operates or stops operating. Specifically, when the high-pressure switch 9 detects that the water pressure on the pipeline drops, the controller receives the signal of the water pressure drop detected by the high-pressure switch 9 and controls the water inlet solenoid valve 41 to open and the pressure stabilizing pump 21 to operate, and the system performs water production. ; When the high pressure switch 9 detects that the water pressure on the pipeline rises, the controller receives the rising signal of the water pressure value detected by the high pressure switch 9 and controls the water inlet solenoid valve 41 to close and the pressure stabilizing pump 21 to stop running, and the system stops water production .

The post-processing unit 5 is a composite filter element, which is made of carbon rod and ultrafiltration membrane filter material, and its function is to further treat the water produced by the reverse osmosis filter device 3 and store it in the water storage device 8 for a period of time. The water produced can finally remove bacteria and odors.

The flushing system 7 includes a flushing solenoid valve 71 and a waste water proportional device 72 connected in parallel, and the input ends of the flushing solenoid valve 71 and the waste water proportional device 72 communicate with the output port of the return unit 6 through pipelines respectively. The flushing solenoid valve 71 and the waste water proportional device 72 are mainly used for concentrated water backflow, waste water discharge and flushing. The flushing solenoid valve 71 is in a normally closed state, and is in an open state when the flushing instruction is executed.

The specific working process of the reverse osmosis system of the present embodiment is as follows:

When producing water, when the high-pressure switch 9 detects that the water pressure on the pipeline has dropped, the controller receives the signal of the water pressure drop detected by the high-pressure switch 9 and controls the water inlet solenoid valve 41 to open and the pressure-stabilizing pump 21 to operate. The water in the pretreatment unit 1 first undergoes adsorption and filtration treatment of PP cotton filter element 11, activated carbon filter element 12 and carbon rod filter element 13 to effectively remove organic matter, residual chlorine and other radioactive substances in the water, as well as decolorize and remove part of the peculiar smell, and then undergo The water solenoid valve 41, flow meter 42 and pressure stabilizing pump 21 enter the reverse osmosis filter device 3, and under the purification treatment of the reverse osmosis membrane, the dissolved salts, colloids, microorganisms, organic matter, etc. in the water are further effectively removed, and the reverse osmosis The primary pure water produced after purification by the filter device 3 enters the post-processing unit 5 for further purification treatment, while the primary concentrated water is filtered through the nanofiltration membrane of the reflux unit 6 to generate pure water and concentrated water, wherein the concentrated water passes through the flushing system 7 The waste water is discharged from the proportional device 72, the pure water is mixed with the pretreated water channel through the booster pump 22, and the mixed water enters the reverse osmosis membrane of the reverse osmosis filter device 3 through the pressure stabilizing pump 21 and is filtered again for secondary treatment to obtain secondary Pure water and secondary concentrated water are then processed similarly to the above cycle. Such concentrated water is continuously recycled, which significantly improves the waste water recovery rate of the system. The concentrated water enters the reverse osmosis filter device after retreatment, which greatly reduces the concentration polarization phenomenon of the reverse osmosis membrane surface of the reverse osmosis filter device, and the system saves energy. While saving water, it reduces the pollution of the reverse osmosis membrane and prolongs the service life of the reverse osmosis filter device.

The final water produced by the reverse osmosis filter device 3 (i.e. the primary pure water and secondary pure water purified by the reverse osmosis filter device 3) and the product water (i.e. pure water) stored by the water storage device 8 for a period of time pass through The filtration process of the composite filter element of the processing unit 5 finally removes bacteria and peculiar smell for safe use by users.

Embodiment two:

This embodiment provides a water purifier, and the water purifier has the reverse osmosis system as described in Embodiment 1. The water purifier improves the waste water recovery rate, saves water and energy, and has a long service life.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be construed as limiting the protection scope of the utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementations of the present utility model without creative work, and these forms will all fall within the protection scope of the present utility model.

Claims (10)

1. a reverse osmosis system, comprise the pretreatment unit (1) connected successively by pipeline, pressure regulating device (2) and reverse-osmosis filtering device (3), it is characterized in that: also comprise the control device (4) be connected between described pretreatment unit (1) and described pressure regulating device (2), the post-processing unit (5) be connected with described reverse-osmosis filtering device (3) respectively and reflux unit (6), described reflux unit (6), described pressure regulating device (2) and described reverse-osmosis filtering device (3) form the secondary treatment recycle system, described reflux unit (6) is also connected with rinse-system (7), described post-processing unit (5) is also connected with water storage device (8).

2. reverse osmosis system according to claim 1, it is characterized in that: described control device (4) comprises entering water electromagnetic valve (41) and the under meter (42) for recording current total amount, the input terminus of described under meter (42) is communicated with by the output terminal of pipeline with described entering water electromagnetic valve (41), and its output terminal is connected with described pressure regulating device (2) by pipeline.

3. reverse osmosis system according to claim 2, it is characterized in that: described pressure regulating device (2) comprises stabilized pressure pump (21) and topping-up pump (22), the input terminus of described stabilized pressure pump (21) is communicated with by the output terminal of pipeline with described under meter (42), the output terminal of described topping-up pump (22) is by the input terminus of pipeline and described stabilized pressure pump (21), the output terminal of described under meter (42) is communicated with, the output terminal of described stabilized pressure pump (21) is communicated with by the input terminus of pipeline with described reverse-osmosis filtering device (3), the input terminus of described topping-up pump (22) is communicated with by the output terminal of pipeline with described reflux unit (6).

4. reverse osmosis system according to claim 3, it is characterized in that: the output terminal of described reverse-osmosis filtering device (3) comprises pure water outlet and dense water out, described dense water out is communicated with by the input terminus of pipeline with described reflux unit (6), the outlet of described pure water is communicated with by the input terminus of pipeline with described post-processing unit (5), the pipeline connecting described reverse-osmosis filtering device (3) and described post-processing unit (5) is provided with the reverse checkvalve (10) for preventing the aqueous reflux in pipeline.

5. reverse osmosis system according to claim 4, it is characterized in that: described water storage device (8), by the pure water outlet of pipeline and the input terminus of described post-processing unit (5), described reverse-osmosis filtering device (3), the connecting pipeline of described water storage device (8) and described post-processing unit (5) and described reverse-osmosis filtering device (3) is provided with the high-voltage switch gear (9) for detecting hydraulic pressure on its place pipeline;

Described control device (4) also comprises controller, described controller is connected with described high-voltage switch gear (9), described entering water electromagnetic valve (41) and described stabilized pressure pump (21) respectively, the hydraulic pressure value size that described controller can detect according to described high-voltage switch gear (9) controls described entering water electromagnetic valve (41) and opens or close, and described stabilized pressure pump (21) operates or shuts down.

6. reverse osmosis system according to claim 1, it is characterized in that: described rinse-system (7) comprises the scouring electromagnetic valve (71) and waste water proportioner (72) that are connected in parallel, described scouring electromagnetic valve (71) is communicated with respectively by the output terminal of pipeline with described reflux unit (6) with the input terminus of described waste water proportioner (72).

7. reverse osmosis system according to claim 2, it is characterized in that: described pretreatment unit (1) comprises the cotton filter core (11) of the PP connected successively, active carbon filter core (12) and carbon-point filter core (13), the input terminus of the cotton filter core (11) of described PP is communicated with the former mouth of a river by pipeline, and the output terminal of described carbon-point filter core (13) is communicated with by the input terminus of pipeline with described entering water electromagnetic valve (41).

8. reverse osmosis system according to claim 1, is characterized in that: described reverse-osmosis filtering device (3) is reverse osmosis membrane filter element, and described reflux unit (6) is nanofiltration membrane filter core.

9. reverse osmosis system according to claim 1, is characterized in that: described post-processing unit (5) is composite filter element, and described composite filter element adopts carbon-point and ultra-filtration membrane filtrate to be made.

10. a water-purifying machine, is characterized in that: described water-purifying machine has the reverse osmosis system as described in any one of claim 1-9.