Reverse osmosis security filter

Abstract

The utility model provides a reverse osmosis security filter which comprises a filter body, a water inlet pipe, a water outlet pipe, a backwashing pipe, a blow-off pipe, a dosing pipe, a pressure difference detection device, a controller and a bactericide tank, a filter screen is arranged in the filter body, and the filter screen divides an inner cavity of the filter body into a first cavity and a second cavity; the water inlet pipe and the blow-off pipe are connected with the first cavity, the water outlet pipe and the backwashing pipe are connected with the second cavity, the dosing pipe is respectively connected with the backwashing pipe and the bactericide tank, and the pressure difference detection device is respectively connected with the first cavity and the second cavity. The utility model aims to solve the problem that the pressure difference of the conventional reverse osmosis security filter is too high due to microorganism breeding.

Description

Technical Field

[0001] The utility model belongs to the technical field of water purification devices, and particularly relates to a reverse osmosis safety filter. Background Technique

[0002] The reverse osmosis device is an effective way to prepare clean water. Since the reverse osmosis membrane is very sensitive and easily blocked or scratched by large particulate matter, it is necessary to set a reverse osmosis safety filter before the reverse osmosis membrane. The reverse osmosis safety filter (Pre-fi ltration for Reverse Osmosis, RO) is a pretreatment device set before the reverse osmosis system, and its main purpose is to protect the reverse osmosis membrane from pollution or damage. The reverse osmosis safety filter is usually installed before the reverse osmosis device to ensure that the water entering the RO system meets a certain cleanliness standard.

[0003] In the boiler make-up water system, there is a problem that the first-stage reverse osmosis safety filter is frequently replaced due to high differential pressure. Especially in summer, the shortest replacement cycle is 40 days, and the longest service life is 90 days. After removing the safety filter element for inspection, it is found that there is an odor and mucus on the surface. After preliminary analysis, it is considered to be microbial fouling. Specifically, after the first-stage reverse osmosis is cleaned, the differential pressure of one section is 0.16 MPa. After running for half a year, the differential pressure rises to 0.35 MPa, and the water production rate drops from 39 t / h to 23 t / h. During the chemical caustic washing process, more microorganisms are washed out, and the pickling process is still very clean. It is basically judged that the main reasons for the increase in differential pressure and the decrease in flow rate of the first-stage reverse osmosis are microbial growth. Content of the Utility Model

[0004] Aiming at the above existing technical problems, the utility model provides a reverse osmosis safety filter to solve the problem of too high differential pressure caused by microbial growth in the existing reverse osmosis safety filter. The reverse osmosis safety filter can effectively avoid microbial growth and improve the service life of the reverse osmosis safety filter.

[0005] The utility model discloses a reverse osmosis security filter, which comprises a filter body, a water inlet pipe, a water outlet pipe, a backwash pipe, a sewage discharge pipe, a chemical dosing pipe, a differential pressure detection device, a controller and a bactericide tank. A filter screen is arranged in the filter body, and the filter screen divides the inner cavity of the filter body into a first cavity and a second cavity. The water inlet pipe and the sewage discharge pipe are connected to the first cavity, the water outlet pipe and the backwash pipe are connected to the second cavity, the chemical dosing pipe is respectively connected to the backwash pipe and the bactericide tank, the differential pressure detection device is respectively connected to the first cavity and the second cavity, a first control valve is arranged on the water inlet pipe, a second control valve is arranged on the water outlet pipe, a third control valve is arranged on the sewage discharge pipe, a fourth control valve is arranged on the backwash pipe, a fifth control valve is arranged on the chemical dosing pipe, and the controller is respectively connected to the differential pressure detection device, the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve.

[0006] Furthermore, an ultrasonic vibration device is arranged on the side wall of the filter body, and the ultrasonic vibration device is located on the side of the filter screen.

[0007] Furthermore, a pressure pump is connected to the backwash pipe.

[0008] When the reverse osmosis security filter is treating sewage, the sewage entering from the water inlet pipe is filtered by the filter screen and then discharged through the water outlet pipe. The differential pressure detection device can monitor the differential pressure on both sides of the filter screen in real time. When it is found that the differential pressure is too large, the backwash pipe is started to backwash the filter screen. During the backwashing process, a certain amount of bactericide can be introduced through the bactericide tank to soak the filter screen. After soaking, the backwash pipe is opened again for backwashing operation, and the backwashed sewage is discharged through the sewage discharge pipe, thereby avoiding the influence of microbial growth on the differential pressure and improving the service life of the reverse osmosis security filter. Description of the Drawings

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 It is a structural schematic diagram of a reverse osmosis security filter. Detailed Embodiments

[0011] The utility model discloses a reverse osmosis security filter, which can effectively avoid the growth of microorganisms and improve the service life of the reverse osmosis security filter.

[0012] Next, the technical solutions in the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. Obviously, the described ones are only part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0013] See Figure 1 As shown, the present utility model provides a reverse osmosis security filter, including a filter body 10, a water inlet pipe 3, a water outlet pipe 5, a backwash pipe 15, a sewage discharge pipe 13, a chemical dosing pipe 16, a differential pressure detection device 1, a controller, and a bactericide tank 6. A filter screen 9 is arranged in the filter body 10. The filter screen 9 divides the inner cavity of the filter body 10 into a first cavity 17 and a second cavity 12. The water inlet pipe 3 and the sewage discharge pipe 13 are connected to the first cavity 17. The water outlet pipe 5 and the backwash pipe 15 are connected to the second cavity 12. The chemical dosing pipe 16 is respectively connected to the backwash pipe 15 and the bactericide tank 6. The differential pressure detection device 1 is respectively connected to the first cavity 17 and the second cavity 12. A first control valve 2 is arranged on the water inlet pipe 3. A second control valve 4 is arranged on the water outlet pipe 5. A third control valve 11 is arranged on the sewage discharge pipe 13. A fourth control valve 14 is arranged on the backwash pipe 15. A fifth control valve 7 is arranged on the chemical dosing pipe 16. The controller is respectively connected to the differential pressure detection device 1, the first control valve 2, the second control valve 4, the third control valve 11, the fourth control valve 14, and the fifth control valve 7.

[0014] An ultrasonic vibration device 8 is arranged on the side wall of the filter body 10, and the ultrasonic vibration device 8 is located on the side of the filter screen 9.

[0015] The backwash pipe 15 is connected with a pressure pump.

[0016] When this reverse osmosis security filter is used for sewage treatment, the sewage entering through the water inlet pipe 3 is filtered by the filter screen 9 and then discharged through the water outlet pipe 5. The differential pressure detection device 1 can monitor the differential pressure on both sides of the filter screen 9 in real time. When it is found that the differential pressure is too large, the backwash pipe 15 is activated to conduct backwashing on the filter screen 9. During the backwashing process, a certain amount of bactericide can be introduced through the bactericide tank 6 to soak the filter screen 9. After soaking, the backwash pipe 15 is opened again for backwashing operation, and the backwashed sewage is discharged through the sewage discharge pipe 13, thereby avoiding the influence of microbial growth on the differential pressure and improving the service life of the reverse osmosis security filter.

[0017] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A reverse osmosis security filter, characterized in that: The invention comprises a filter body, a water inlet pipe, a water outlet pipe, a backwash pipe, a sewage pipe, a dosing pipe, a pressure difference detection device, a controller and a bactericide tank. A filter screen is arranged in the filter body. The filter screen separates the inner cavity of the filter body into a first cavity and a second cavity. The water inlet pipe and the sewage pipe are connected to the first cavity, the water outlet pipe and the backwash pipe are connected to the second cavity, the dosing pipe is respectively connected to the backwash pipe and the bactericide tank, the pressure difference detection device is respectively connected to the first cavity and the second cavity, the water inlet pipe is provided with a first control valve, the water outlet pipe is provided with a second control valve, the sewage pipe is provided with a third control valve, the backwash pipe is provided with a fourth control valve, the dosing pipe is provided with a fifth control valve, and the controller is respectively connected to the pressure difference detection device, the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve.

2. A reverse osmosis security filter according to claim 1, characterized in that: The side wall of the filter body is provided with an ultrasonic vibration device, and the ultrasonic vibration device is located on the side of the filter screen.

3. A reverse osmosis security filter according to claim 1, characterized in that: The backwash pipe is connected with a pressure pump.

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