Two-stage reverse osmosis water purification system

Abstract

The embodiment of the utility model provides a two-stage reverse osmosis water purification system which comprises a first-stage reverse osmosis device and a second-stage reverse osmosis device, and each of the first-stage reverse osmosis device and the second-stage reverse osmosis device is provided with a water inlet pipeline, a pure water outlet pipeline and a concentrated water outlet pipeline; a first one-way valve, a flow meter and a first ball valve are arranged on a pure water outlet pipeline of the first-stage reverse osmosis device, so that the first-stage reverse osmosis device can independently run and be debugged; a water inlet pipeline of the second-stage reverse osmosis device is communicated between a pure water outlet of the first-stage reverse osmosis device and the first one-way valve, a first negative pressure safety valve and a pressure sensor are arranged on the water inlet pipeline of the second-stage reverse osmosis device, and the second-stage reverse osmosis device can automatically operate when the pressure detected by the pressure sensor reaches a set value; a transition water tank is not needed, and independent operation and debugging can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment equipment, in particular to a two-stage reverse osmosis pure water system. Background Technique

[0002] Since the drainage volume of the boiler is determined according to the feed water condition, the worse the water quality, the greater its drainage volume. With the increasingly strict domestic environmental protection requirements, in order to reduce sewage discharge, a pure water system is usually used instead of a water softener for water treatment. However, it is difficult to meet the feed water hardness requirements of the boiler only by relying on a single-stage reverse osmosis pure water system. Therefore, a two-stage reverse osmosis device is usually required. Currently, the common two-stage reverse osmosis pure water systems in China generally set up a transition water tank between the first-stage reverse osmosis device and the second-stage reverse osmosis device, which occupies a large space and the water quality is easily polluted, or the water production pressure of the second-stage reverse osmosis device is pushed by the first-stage reverse osmosis device, and the two reverse osmosis devices cannot operate independently. Content of the Utility Model

[0003] In view of this, the embodiments of the utility model provide a two-stage reverse osmosis pure water system, which does not need to set up a transition water tank, and the two reverse osmosis devices can operate and be debugged independently.

[0004] A two-stage reverse osmosis pure water system provided by the embodiments of the utility model includes a first-stage reverse osmosis device and a second-stage reverse osmosis device. Both the first-stage reverse osmosis device and the second-stage reverse osmosis device are provided with a water inlet pipeline, a pure water outlet pipeline and a concentrated water outlet pipeline. Along the water flow direction on the pure water outlet pipeline of the first-stage reverse osmosis device, a first one-way valve, a flow meter and a first ball valve are sequentially arranged; the water inlet pipeline of the second-stage reverse osmosis device is connected between the pure water outlet of the first-stage reverse osmosis device and the first one-way valve, and the pure water output of the first-stage reverse osmosis device meets the water intake of the second-stage reverse osmosis device; along the water flow direction on the water inlet pipeline of the second-stage reverse osmosis device, a first negative pressure safety valve and a pressure sensor are sequentially arranged, and the second-stage reverse osmosis device is configured to automatically operate when the pressure detected by the pressure sensor reaches a set value.

[0005] Optionally, a filter is installed on the water inlet pipeline of the first-stage reverse osmosis device, and a second negative pressure safety valve is arranged between the filter and the water inlet of the first-stage reverse osmosis device.

[0006] Optionally, a second one-way valve and a second ball valve are sequentially arranged along the water flow direction on the concentrated water outlet pipeline of the second-stage reverse osmosis device.

[0007] Optionally, the concentrated water outlet pipeline of the second-stage reverse osmosis device is connected to the water inlet pipeline of the first-stage reverse osmosis device.

[0008] Optionally, a third one-way valve is provided on the pure water outlet pipeline of the second-stage reverse osmosis device.

[0009] Optionally, a hardness leakage alarm device is provided on the pure water outlet pipeline of the second-stage reverse osmosis device, and the first-stage reverse osmosis device is configured to automatically reduce the recovery rate when the hardness leakage alarm device detects that the hardness exceeds the standard.

[0010] The embodiment of the present utility model has the following beneficial effects: A first one-way valve, a flow meter, and a first ball valve are provided on the pure water outlet pipeline of the first-stage reverse osmosis device, enabling the first-stage reverse osmosis device to operate and be debugged independently; the inlet pipeline of the second-stage reverse osmosis device is connected between the pure water outlet of the first-stage reverse osmosis device and the first one-way valve, and a first negative pressure safety valve and a pressure sensor are provided on the inlet pipeline of the second-stage reverse osmosis device. The second-stage reverse osmosis device can automatically operate when the pressure detected by the pressure sensor reaches the set value, without the need to set up a transition water tank, and can operate and be debugged independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0012] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0013] The numbers in the figure represent:

[0014] 1. First-stage reverse osmosis device; 2. Second-stage reverse osmosis device; 3. First one-way valve; 4. Flow meter; 5. First ball valve; 6. First negative pressure safety valve; 7. Pressure sensor; 8. Filter; 9. Second negative pressure safety valve; 10. Second one-way valve; 11. Second ball valve; 12. Third one-way valve; 13. Hardness leakage alarm device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0016] Please refer to Figure 1As shown in the figure, an embodiment of the present utility model provides a two-stage reverse osmosis pure water system, which includes a first-stage reverse osmosis device 1 and a second-stage reverse osmosis device 2. Both the first-stage reverse osmosis device 1 and the second-stage reverse osmosis device 2 can directly adopt the existing reverse osmosis pure water devices on the current market. The first-stage reverse osmosis device 1 and the second-stage reverse osmosis device 2 are both provided with a water inlet pipeline, a pure water outlet pipeline, and a concentrated water outlet pipeline. Among them, along the water flow direction on the pure water outlet pipeline of the first-stage reverse osmosis device 1, a first check valve 3, a flow meter 4, and a first ball valve 5 are sequentially arranged. The first-stage reverse osmosis pure water can be separately led out through this pure water outlet pipeline for use, and the flow rate of the first-stage reverse osmosis pure water flowing out can be adjusted through the first ball valve 5.

[0017] The water inlet pipeline of the second-stage reverse osmosis device 2 is connected between the pure water outlet of the first-stage reverse osmosis device 1 and the first check valve 3, and the pure water output of the first-stage reverse osmosis device 1 needs to meet the water supply for the second-stage reverse osmosis device 2. Along the water flow direction on the water inlet pipeline of the second-stage reverse osmosis device 2, a first negative pressure safety valve 6 and a pressure sensor 7 are sequentially arranged. The pressure sensor 7 is connected to the control module of the second-stage reverse osmosis device 2, so that the second-stage reverse osmosis device 2 can automatically operate when the pressure detected by the pressure sensor 7 reaches the set value. There is no need to set a transition water tank between the first-stage reverse osmosis device 1 and the second-stage reverse osmosis device 2, and the first-stage reverse osmosis device 1 and the second-stage reverse osmosis device 2 can operate and be debugged independently. The first negative pressure safety valve 6 can protect the first-stage reverse osmosis device 1 when the second-stage reverse osmosis device 2 fails and stops, to avoid damage to the first-stage reverse osmosis device 1 caused by the reverse flow of the medium.

[0018] Furthermore, a filter 8 is installed on the water inlet pipeline of the first-stage reverse osmosis device 1, and a second negative pressure safety valve 9 is arranged between the filter 8 and the water inlet of the first-stage reverse osmosis device 1. The second negative pressure safety valve 9 can protect the filter 8 when the first-stage reverse osmosis device 1 fails and stops, to avoid damage to the filter 8 caused by the reverse flow of the medium.

[0019] Along the water flow direction on the concentrated water outlet pipeline of the second-stage reverse osmosis device 2, a second check valve 10 and a second ball valve 11 are sequentially arranged. The concentrated water of the second-stage reverse osmosis device 2 can be led out through this concentrated water outlet pipeline for use, and the flow rate of the concentrated water flowing out can be adjusted through the second ball valve 11. The concentrated water outlet pipeline of the second-stage reverse osmosis device 2 can also be connected to the water inlet pipeline of the first-stage reverse osmosis device 1 to recycle the concentrated water discharged from the second-stage reverse osmosis device 2.

[0020] In addition, a third one-way valve 12 is provided on the pure water outlet pipeline of the second-stage reverse osmosis device 2, and the pure water of the second-stage reverse osmosis can be led out through this pure water outlet pipeline for use. Further, a hardness leakage alarm device 13 is also provided on the pure water outlet pipeline of the second-stage reverse osmosis device 2. Since the hardness of the pure water of the second-stage reverse osmosis needs to meet the requirements of boiler feed water, the hardness leakage alarm device 13 can monitor the hardness of the pure water of the second-stage reverse osmosis in real time and give an alarm when the hardness exceeds the standard. The first-stage reverse osmosis device 1 can automatically reduce the recovery rate when the hardness leakage alarm device 13 detects that the hardness exceeds the standard, so as to reduce the hardness leakage of the second-stage reverse osmosis device 2.

[0021] In this article, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present invention; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-stage reverse osmosis pure water system, comprising a first-stage reverse osmosis device and a second-stage reverse osmosis device. Both the first-stage reverse osmosis device and the second-stage reverse osmosis device are provided with a water inlet pipeline, a pure water outlet pipeline, and a concentrated water outlet pipeline, and are characterized in that: On the pure water outlet pipeline of the first-stage reverse osmosis device, a first check valve, a flow meter, and a first ball valve are sequentially arranged along the water flow direction; the inlet pipeline of the second-stage reverse osmosis device is connected between the pure water outlet of the first-stage reverse osmosis device and the first check valve, and the pure water output of the first-stage reverse osmosis device meets the water supply for the inlet of the second-stage reverse osmosis device; on the inlet pipeline of the second-stage reverse osmosis device, a first negative pressure safety valve and a pressure sensor are sequentially arranged along the water flow direction, and the second-stage reverse osmosis device is configured to automatically operate when the pressure detected by the pressure sensor reaches a set value.

2. The secondary reverse osmosis pure water system according to claim 1, wherein: A filter is installed on the inlet pipeline of the first-stage reverse osmosis device, and a second negative pressure safety valve is arranged between the filter and the water inlet of the first-stage reverse osmosis device.

3. A two-stage reverse osmosis pure water system according to claim 1, characterized in that: On the concentrated water outlet pipeline of the second-stage reverse osmosis device, a second check valve and a second ball valve are sequentially arranged along the water flow direction.

4. A secondary reverse osmosis pure water system according to claim 3, characterized in that: The concentrated water outlet pipeline of the second-stage reverse osmosis device is connected to the inlet pipeline of the first-stage reverse osmosis device.

5. A two-stage reverse osmosis pure water system according to claim 1, characterized in that: A third check valve is arranged on the pure water outlet pipeline of the second-stage reverse osmosis device.

6. The secondary reverse osmosis pure water system according to claim 1, characterized in that: A hardness leakage alarm device is arranged on the pure water outlet pipeline of the second-stage reverse osmosis device, and the first-stage reverse osmosis device is configured to automatically reduce the recovery rate when the hardness leakage alarm device detects that the hardness exceeds the standard.

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