An integrated reverse osmosis membrane system

Abstract

The utility model belongs to water treatment technical field, concretely relates to integrated reverse osmosis membrane system, include: primary reverse osmosis membrane unit, including first membrane assembly and second membrane assembly, the water inlet end of first membrane assembly is connected total inlet water tank, the water outlet end is connected second membrane assembly's water inlet end, first membrane assembly is equipped with first water production branch pipe, and second membrane assembly is equipped with second water production branch pipe and primary concentrated water discharge pipe, first water production branch pipe and second water production branch pipe all are connected primary water production tank, secondary reverse osmosis membrane unit is equipped with third water production branch pipe and secondary concentrated water discharge pipe, and its water inlet end is connected primary water production tank, reflux device includes reflux main pipe, first reflux branch pipe and second reflux branch pipe, reflux main pipe connects total inlet water tank, first reflux branch pipe connects first membrane assembly, and second reflux branch pipe connects second membrane assembly, the utility model can promote water quality, reduce the influence of water quality fluctuation to system water quality, has better market application prospect.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, specifically relating to an integrated reverse osmosis membrane system. Background Technology

[0002] Reverse osmosis, as a highly efficient and clean desalination technology, is widely used in various industries. However, during the production process, approximately 25% of the total feed water is discharged as concentrate. This represents a significant waste of water resources in today's increasingly scarce water environment and seriously hinders the further promotion of reverse osmosis technology. To improve the quality of the produced water and the system recovery rate, this application provides an integrated reverse osmosis membrane system.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide an integrated reverse osmosis membrane system to improve the quality of produced water and the system recovery rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An integrated reverse osmosis membrane system, comprising: A primary reverse osmosis membrane unit includes a first membrane module and a second membrane module; the inlet end of the first membrane module is connected to the main feed water tank, and the inlet end of the second membrane module is connected to the outlet end of the first membrane module; the first membrane module is provided with a first product water branch pipe, and the second membrane module is provided with a second product water branch pipe and a primary concentrate discharge pipe; both the first product water branch pipe and the second product water branch pipe are connected to the primary product water tank. The secondary reverse osmosis membrane unit has its inlet end connected to the primary product water tank; the secondary reverse osmosis membrane unit is equipped with a third product water branch pipe and a secondary concentrate discharge pipe; The reflux device includes a reflux main pipe and a first reflux branch pipe and a second reflux branch pipe connected to the reflux main pipe; the reflux main pipe is connected to the main water inlet tank, the first reflux branch pipe is connected to the first membrane module, and the second reflux branch pipe is connected to the second membrane module.

[0006] Preferably, the first membrane module is provided with a first circulation pump at its inlet end, and the second membrane module is provided with a second circulation pump at its inlet end.

[0007] Preferably, the secondary reverse osmosis membrane unit is connected to the primary product water tank via a third return branch pipe.

[0008] Preferably, the first, second, and third water production branch pipes are each equipped with a water production valve; the return main pipe, the first return branch pipe, the second return branch pipe, and the third return branch pipe are each equipped with a return valve.

[0009] Preferably, the secondary concentrate discharge pipe is connected to the main water inlet tank.

[0010] Compared with the prior art, the present invention has the following beneficial effects: (1) The integrated reverse osmosis membrane system of this utility model purifies and concentrates the raw water through the first membrane module and the second membrane module of the first-stage reverse osmosis membrane unit, and then combines the resulting product water as the feed water of the second-stage reverse osmosis membrane unit for further purification and concentration, which is beneficial to improving the quality of the product water.

[0011] (2) The integrated reverse osmosis membrane system of this utility model returns the concentrated water after the reverse osmosis membrane treatment of the secondary reverse osmosis membrane unit to the main water inlet of the system, mixes it with the raw water and treats it again, which can further improve the system recovery rate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the system structure of this utility model; Explanation of key figure labels: 1. Primary reverse osmosis membrane unit; 2. Main feed tank; 3. First product water branch pipe; 4. Second product water branch pipe; 5. Primary concentrate discharge pipe; 6. Primary product water tank; 7. Secondary reverse osmosis membrane unit; 8. Third product water branch pipe; 9. Secondary concentrate discharge pipe; 10. Return main pipe; 11. First return branch pipe; 12. Second return branch pipe; 13. First circulation pump; 14. Second circulation pump; 15. Third return branch pipe. Detailed Implementation

[0013] The technical solution of this utility model patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] See attached document Figure 1 An integrated reverse osmosis membrane system includes: a primary reverse osmosis membrane unit 1, a secondary reverse osmosis membrane unit 7, and a reflux device. The reverse osmosis membrane is a Dow reverse osmosis membrane, model BW30FR-400 / 34.

[0017] The first-stage reverse osmosis membrane unit 1 includes a first membrane module and a second membrane module; the inlet end of the first membrane module is connected to the main feed water tank 2, and the inlet end of the second membrane module is connected to the outlet end of the first membrane module; the first membrane module is provided with a first product water branch pipe 3, and the second membrane module is provided with a second product water branch pipe 4 and a first-stage concentrate discharge pipe 5; both the first product water branch pipe 3 and the second product water branch pipe 4 are connected to the first-stage product water tank 6; the second-stage reverse osmosis membrane unit 7 has its inlet end connected to the first-stage product water tank 6; the second-stage reverse osmosis membrane unit 7 is provided with a third product water branch pipe 8 and a second-stage concentrate discharge pipe 9.

[0018] The reflux device includes a reflux main pipe 10 and a first reflux branch pipe 11 and a second reflux branch pipe 12 connected to the reflux main pipe 10; the reflux main pipe 10 is connected to the main water inlet tank 2, the first reflux branch pipe 11 is connected to the first membrane module, and the second reflux branch pipe 12 is connected to the second membrane module.

[0019] In this embodiment, a first circulation pump 13 is provided at the inlet end of the first membrane module, and a second circulation pump 14 is provided at the inlet end of the second membrane module. The secondary reverse osmosis membrane unit 7 is connected to the primary permeate tank 6 via a third return branch pipe 15. Permeate valves are provided on the first permeate branch pipe 3, the second permeate branch pipe 4, and the third permeate branch pipe 8; return valves are provided on the return main pipe 10, the first return branch pipe 11, the second return branch pipe 12, and the third return branch pipe 15. The secondary concentrate discharge pipe 9 is connected to the main feed tank 2.

[0020] The system's operation can be divided into two modes based on whether the permeate water quality meets standards: normal permeate and recirculation treatment. In normal permeate mode, after pretreatment, the raw water first enters the first membrane module of the primary reverse osmosis membrane unit 1. The first stage of concentrate after membrane treatment enters the second membrane module of the primary reverse osmosis membrane unit 1 for further purification and concentration. The concentrate produced by the second membrane module is discharged as the final high-salinity wastewater, while the permeate produced by the second membrane module is combined with the permeate from the first membrane module to serve as the feed water for the secondary reverse osmosis membrane unit 7. The inlet of the secondary reverse osmosis membrane unit 7 is connected to the main permeate pipeline of the primary reverse osmosis membrane unit 1 via the primary permeate tank 6. The concentrate after secondary reverse osmosis membrane treatment is recirculated to the main feed water tank 2, mixed with the raw water, and treated again to further improve the system recovery rate. The permeate from the secondary reverse osmosis membrane unit 7 is discharged as the final permeate water meeting standards. In this mode, all valves on the permeate branch pipes are open, and all valves on the recirculation branch pipes are closed.

[0021] In reflux treatment mode, the system monitors the permeate water quality of any membrane module in real time. If the permeate water quality of a particular membrane module fails to meet the set standard, the control system immediately closes the corresponding permeate valve to prevent substandard water from entering the next stage, and simultaneously opens the corresponding reflux valve. Substandard permeate water from the first-stage reverse osmosis membrane unit 1 flows through the corresponding reflux branch pipe into the reflux main pipe 10, is transported back to the main feed tank 2 or the front end of the pretreatment system, mixes with the raw water, and then re-enters the entire membrane system for treatment. Similarly, substandard permeate water from the second-stage reverse osmosis membrane unit 7 flows through the corresponding reflux branch pipe into the first-stage permeate tank 6, mixes with the first-stage permeate water, and then re-enters the second-stage reverse osmosis membrane unit 7 for treatment. This process can be performed on a single stage or multiple stages simultaneously until the permeate water quality returns to the standard, at which point the system switches back to normal permeate water mode.

[0022] This utility model's integrated reverse osmosis membrane system, by setting up a primary reverse osmosis membrane unit 1, a secondary reverse osmosis membrane unit 7, and a reflux device, and by installing control valves on each pipeline, monitors the permeate water at each stage. If the permeate water meets the standards, it proceeds to the next stage; if it does not meet the standards, it is repeatedly purified and concentrated. This can effectively improve the quality of the permeate water and increase the recovery rate of the entire reverse osmosis membrane system. It is very practical and has good market application prospects.

[0023] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. An integrated reverse osmosis membrane system, characterized in that, include: A primary reverse osmosis membrane unit includes a first membrane module and a second membrane module; the inlet end of the first membrane module is connected to the main feed water tank, and the inlet end of the second membrane module is connected to the outlet end of the first membrane module; the first membrane module is provided with a first product water branch pipe, and the second membrane module is provided with a second product water branch pipe and a primary concentrate discharge pipe; both the first product water branch pipe and the second product water branch pipe are connected to the primary product water tank. The secondary reverse osmosis membrane unit has its inlet end connected to the primary product water tank; the secondary reverse osmosis membrane unit is equipped with a third product water branch pipe and a secondary concentrate discharge pipe; The reflux device includes a reflux main pipe and a first reflux branch pipe and a second reflux branch pipe connected to the reflux main pipe; the reflux main pipe is connected to the main water inlet tank, the first reflux branch pipe is connected to the first membrane module, and the second reflux branch pipe is connected to the second membrane module.

2. The integrated reverse osmosis membrane system according to claim 1, characterized in that, The first membrane module is equipped with a first circulation pump at its inlet end, and the second membrane module is equipped with a second circulation pump at its inlet end.

3. The integrated reverse osmosis membrane system according to claim 1, characterized in that, The secondary reverse osmosis membrane unit is connected to the primary product water tank via a third return branch pipe.

4. The integrated reverse osmosis membrane system according to claim 3, characterized in that, Each of the first, second, and third water production branch pipes is equipped with a water production valve; each of the main return pipe, first return branch pipe, second return branch pipe, and third return branch pipe is equipped with a return valve.

5. The integrated reverse osmosis membrane system according to claim 1, characterized in that, The secondary concentrate discharge pipe is connected to the main water inlet tank.

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