RO (Reverse Osmosis) membrane water-driven pure water system

Abstract

The utility model discloses an RO (Reverse Osmosis) membrane water-driven pure water system and relates to the technical field of pure water preparation and treatment. The system solves the problems that after an RO reverse osmosis membrane stops producing water, concentrated water permeates to affect water quality, pressure barrels cannot be cleaned, and rubber liners are polluted, and comprises a booster pump, the booster pump is connected with the RO reverse osmosis membrane, and a pure water outlet of the RO reverse osmosis membrane is connected with a first pressure barrel through a first one-way valve, a second one-way valve and a pressure switch in sequence; the first one-way valve and the second one-way valve are connected with a second pressure barrel through pipelines; an outlet of the second pressure barrel is connected with a water inlet end of the RO membrane through a third one-way valve; the pressure switch controls the booster pump to stop after detecting that the pressure value is larger than a preset value. And after the system is started, the produced water at the initial stage does not need to be discharged, so that the use of a user is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of pure water preparation and treatment technology. Background Technology

[0002] In pure water treatment technology, reverse osmosis (RO) technology has been widely used in civilian, scientific research, pharmaceutical, and food industries. It effectively removes impurities such as inorganic salts, heavy metal ions, organic matter, colloids, bacteria, and viruses from water. Furthermore, in ultrapure water systems, RO is typically used as a pre-filtration stage before the ultrapure water column to ensure the water quality and lifespan of the ultrapure water column. It is a crucial component in pure water systems.

[0003] Existing RO reverse osmosis pure water systems have the following problems:

[0004] 1. When the RO reverse osmosis system stops producing water, a portion of concentrate will remain at both the inlet and wastewater ends of the RO reverse osmosis membrane. Due to the lack of external pressure, water on both sides of the RO reverse osmosis membrane will undergo bidirectional permeation, ultimately leading to a deterioration in the pure water end of the RO reverse osmosis membrane. When the system restarts water production, the initial water quality of the RO reverse osmosis water usually does not meet the usage conditions due to concentrate permeation. The substandard RO reverse osmosis water needs to be discharged for several minutes to restore it to normal water quality. If this substandard water is not discharged, it will flow into the downstream ultrapure column and reduce its service life.

[0005] 2. In a typical RO reverse osmosis pure water system, a pressure tank is used to store reverse osmosis pure water in the pure water section. When water is drawn, the stored pure water is mixed with the substandard water produced during the initial startup of the reverse osmosis system. Although the water quality appears to have improved, the substandard water is not actually discharged; it is merely diluted and produced. All the substandard water still ends up in the back end of the pure water system. Furthermore, most pressure tanks on the market are rubber-lined, which not only cannot be cleaned, but the rubber itself can also age and leach impurities. Utility Model Content

[0006] In summary, the purpose of this utility model is to solve the problems of concentrated water seepage affecting water quality after the RO reverse osmosis membrane stops producing water, the inability to clean the pressure tank, and the contamination of the rubber inner tank. It proposes an RO membrane water-driven pure water system to improve the water quality of the pure water system and the lifespan of system consumables.

[0007] To solve the technical problem proposed by this utility model, the technical solution adopted is as follows:

[0008] An RO membrane water-driven pure water system includes a booster pump (2) connected to a raw water inlet (1), a reverse osmosis membrane (4) connected to the outlet of the booster pump (2), the RO reverse osmosis membrane (4) including a wastewater discharge outlet (5) and a pure water outlet, the pure water outlet being connected to a first pressure tank (10) via a first check valve (7), a second check valve (8) and a pressure switch (9) in sequence, the outlet of the first pressure tank (10) being connected to a pure water supply outlet (11); a second pressure tank (6) is also connected to the first check valve (7) and the second check valve (8) via a pipe, the outlet of the second pressure tank (6) being connected to the inlet of the RO reverse osmosis membrane (4) via a third check valve (3); the pressure switch (9) controls the booster pump (2) to stop after detecting a pressure value greater than a preset value.

[0009] The first pressure tank (10) and the second pressure tank (6) are both linerless pressure tanks.

[0010] The beneficial effects of this invention are as follows: 1. The residual water inside the RO reverse osmosis membrane is pure water. Even in the event of bidirectional osmosis, when the pure water system resumes production 24 hours after shutdown, the water quality is basically the same as the normal production water quality. There is no need to discharge the initial production water, thus not affecting user use. 2. The use of a tankless internal pressurized water-driven pressure tank allows for easy cleaning at any time, eliminating the possibility of water pollution from a rubber inner tank. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structural principle of this utility model. Detailed Implementation

[0012] The structure of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0013] Reference Figure 1 As shown in the diagram, this utility model discloses an RO membrane water-driven pure water system, including a booster pump 2 connected to a raw water inlet 1. The outlet of the booster pump 2 is connected to a reverse osmosis membrane 4. The RO reverse osmosis membrane 4 includes a wastewater discharge outlet 5 and a pure water outlet. The pure water outlet is connected to a first pressure tank 10 via a first one-way valve 7, a second one-way valve 8, and a pressure switch 9. The outlet of the first pressure tank 10 is connected to a pure water supply outlet 11. A second pressure tank 6 is also connected to the first one-way valve 7 and the second one-way valve 8 via a pipe. The outlet of the second pressure tank 6 is connected to the inlet of the RO reverse osmosis membrane 4 via a third one-way valve 3. The pressure switch 9 controls the booster pump 2 to stop after detecting a pressure value greater than a preset value. Both the first pressure tank 10 and the second pressure tank 6 are linerless pressure tanks, reducing the risk of contamination from the inner tank.

[0014] During operation, raw water enters the booster pump 2 from the raw water inlet 1, and the booster pump 2 pressurizes the raw water to the RO reverse osmosis membrane 4. The wastewater from the RO reverse osmosis membrane 4 is discharged from the wastewater outlet 5. The pure water from the RO reverse osmosis membrane 4 enters the second pressure tank 6 and the first pressure tank 10 simultaneously through the first one-way valve 7 and the second one-way valve 8, respectively. When the pure water supply outlet 11 is closed, the control system stops water production when the pressure switch 9 between the second one-way valve 8 and the second pressure tank 10 senses that the pressure value is greater than the preset value. At this time, the pure water in the second pressure tank 6 is injected from the inlet of the RO reverse osmosis membrane 4 through the third one-way valve 3 to replace the concentrated water in the membrane. Any excess pure water will be discharged from the wastewater outlet 5.

[0015] The second pressure tank 6 is protected by the third one-way valve 3, which prevents tap water from flowing back and ensures water quality safety. The first pressure tank 10 is also protected by the second one-way valve 8 and can store pure water.

[0016] This invention adds a second pressure tank 6 to the pure water outlet of the RO reverse osmosis membrane 4. The second pressure tank 6 is an internally pressurized water-driven pressure tank. It uses the existing air inside the tank for compression and pressurization. The pure water stored in this pressure tank is injected into the inlet of the RO reverse osmosis membrane 4 after the system is shut down, replacing the original tap water and concentrate with pure water. This solves the problems of deterioration of pure water quality after long-term shutdown of the RO reverse osmosis membrane and contamination of the rubber liner of conventional pressure tanks. It consists of an internally pressurized pressure tank, a high-pressure switch, a one-way valve, and other accessories. It does not require electricity, reduces manufacturing and maintenance costs while ensuring pure water quality, and achieves a state of no concentrate after system shutdown. After startup, there is no need to discharge the initial product water, so it does not affect user use.

Claims

1. A reverse osmosis (RO) membrane water driven pure water system, characterized in that The system includes a booster pump (2) connected to the raw water inlet (1), and a reverse osmosis membrane (4) connected to the outlet of the booster pump (2). The RO reverse osmosis membrane (4) includes a wastewater discharge outlet (5) and a pure water outlet. The pure water outlet is connected to a first pressure tank (10) via a first check valve (7), a second check valve (8), and a pressure switch (9). The outlet of the first pressure tank (10) is connected to a pure water supply outlet (11). The first check valve (7) and the second check valve (8) are also connected to a second pressure tank (6) via a pipe. The outlet of the second pressure tank (6) is connected to the inlet of the RO reverse osmosis membrane (4) via a third check valve (3). The pressure switch (9) controls the booster pump (2) to stop after detecting that the pressure value is greater than the preset value.

2. The RO membrane water driven pure water system according to claim 1, characterized in that: The first pressure tank (10) and the second pressure tank (6) are both linerless pressure tanks.

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