Concentrated water reverse osmosis device and method

Abstract

The invention discloses a concentrated water reverse osmosis device and method.The concentrated water reverse osmosis device comprises a reverse osmosis module which sequentially comprises a filter, a high-pressure pump and a reverse osmosis assembly to form a reverse osmosis pipeline, and a collection module which is connected with the reverse osmosis module and comprises a first water tank and a second water tank, the high-pressure pump acts on the first water tank, and the second water tank is connected to the tail end of the reverse osmosis assembly, so that an osmosis scheme can be more perfect and efficient, different filtering schemes can be selected according to different degrees of filtration of medium-concentration water, and the medium-concentration water can be repeatedly filtered by adopting different methods according to different conditions; and the permeation device on the permeation pipeline which is not started also participates in filtering.

Description

Technical Field

[0001] The invention relates to the field of medium-concentrated water recovery, and in particular to a concentrated water reverse osmosis device and method. Background Art

[0002] In the traditional water production system, the reverse osmosis filtration device will produce a large amount of concentrated water during operation. Specifically, the water source is pressurized by the high-pressure pump from the ultrafiltration water tank and enters the reverse osmosis device. The selective permeability of the reverse osmosis membrane reduces the conductivity of the water.

[0003] The traditional medium-bacterium water recovery scheme will result in a large amount of brine discharged, causing a waste of water resources, increasing production costs, and being unable to achieve repeated filtration of brine. The discharge of brine puts a certain amount of pressure on the environment and does not meet environmental protection requirements. The large amount of brine discharged affects the overall water consumption indicators and is not conducive to the sustainable development of the enterprise.

[0004] And a concentrate reverse osmosis device usually includes multiple concentrate permeation pipelines. These pipelines usually do not work when a group of permeation pipelines is in use. Although there are many groups of permeation devices, each permeation device works on its own pipeline. In this way, one group of devices is working while the rest of the permeation devices are in a shutdown state and cannot participate in the work, which is a waste of resources. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is that: for the circulating osmosis filtration of medium-concentrated water, a lot of resources are wasted, the osmosis efficiency is low, and it is impossible to realize the simultaneous action of multiple groups of osmosis devices.

[0006] The above technical problems are solved by the following technical solutions: The present invention proposes a concentrated water reverse osmosis device, which includes a reverse osmosis module, which includes a filter, a high-pressure pump and a reverse osmosis component in sequence to form a reverse osmosis pipeline, and the reverse osmosis pipeline is arranged in several groups. The output end of the reverse osmosis filtration component includes a recovery pipeline and a discharge pipeline. The qualified solution after filtration by the reverse osmosis component is discharged to the recovery pipeline, and the unqualified solution after filtration is discharged to the discharge pipeline. The collection module provides solution to the reverse osmosis line and recovers the solution of the reverse osmosis line. It includes a first water tank and a second water tank. The high-pressure pump extracts solution into the first water tank, and the second water tank is connected to the output end of the recovery pipeline.

[0007] In a preferred embodiment of the concentrated water reverse osmosis device and method of the present invention: the reverse osmosis pipeline is divided into several groups, the reverse osmosis assembly includes a filter component and a valve component, the filter component includes a first filter layer and a second filter layer, and the valve component is arranged on the reverse osmosis pipeline and controls the several groups of reverse osmosis pipelines to cooperate with each other.

[0008] In a preferred embodiment of the concentrated water reverse osmosis device and method of the present invention: both the first filter layer and the second filter layer are composed of filter membranes, and the number of filter membranes in the first filter layer is at least twice that of the second filter layer.

[0009] In a preferred embodiment of the concentrated water reverse osmosis device and method of the present invention: the recovery pipeline and the discharge pipeline are respectively located at the qualified output end and the unqualified output end of the second filter layer, and the end of the recovery pipeline is connected to the second water tank.

[0010] In a preferred embodiment of the concentrated water reverse osmosis device and method of the present invention: the valve components include a connection valve arranged on the reverse osmosis pipeline between the first filter layer and the second filter layer, a discharge valve arranged on the discharge pipeline, and a water production valve arranged on the recovery pipeline.

[0011] In a preferred embodiment of the concentrated water reverse osmosis device and method of the present invention: a pipeline is added to connect several groups of the discharge pipelines to the first water tank at the rear of the water production valve to form a circulating pipeline.

[0012] In a preferred embodiment of the concentrated water reverse osmosis device and method of the present invention: the valve assembly further includes several groups of stop valves, and the stop valves are used to connect several groups of reverse osmosis pipelines for alternate use.

[0013] In a preferred embodiment of the concentrated water reverse osmosis device and method of the present invention: the valve assembly further includes a first stop valve and a second stop valve connected between any two groups of the circulating pipelines, and a third stop valve and a fourth stop valve at the front section of the discharge valve on the discharge pipeline.

[0014] The beneficial effect of the concentrated water reverse osmosis device of the present invention is: the valve assembly further includes a first stop valve and a second stop valve connected between any two groups of the circulating pipelines, and a third stop valve and a fourth stop valve at the front section of the discharge valve on the discharge pipeline.

[0015] Another object of the present invention is to provide a recovery method for a concentrated water reverse osmosis device, aiming to solve the problem that more in-depth filtration cannot be achieved during the concentrated water penetration process, and the traditional filtration method is too single.

[0016] To solve the above technical problems, the present invention also provides the following technical solution: a recovery method for a concentrated water reverse osmosis device, which includes keeping all valves closed in the initial state of all reverse osmosis pipelines. By enabling one group of the reverse osmosis pipelines and disabling another group of reverse osmosis pipelines, the enabled reverse osmosis pipelines are opened by opening the connection valve, the water production valve, the third stop valve, the sixth stop valve, and the discharge valve and the water production valve of another group of reverse osmosis pipelines.

[0017] In a preferred embodiment of the concentrated water reverse osmosis device and method of the present invention: the unactivated reverse osmosis pipeline is controlled by a second stop valve to close its water production valve. After the medium-concentrated water is cycled and filtered, the water production valve is opened and the first stop valve is closed for collection.

[0018] The beneficial effects of the present invention are as follows: it can make the osmosis scheme more perfect and efficient. Different filtration schemes can be selected according to the degree of filtration required for different medium-concentrated waters, and repeated filtration of the medium-concentrated water using different methods for different situations can be achieved. Moreover, the osmosis devices on the unactivated osmosis pipelines are also involved in the filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0020] Figure 1 shows a pipeline schematic diagram of the concentrated water reverse osmosis device;

[0021] Figure 2 shows the multiple filtration and circulation pipelines of the concentrated water reverse osmosis device; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the specific embodiments and the drawings.

[0023] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention. However, these terms may change according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0024] Refer to Figure 1 and Figure 2, this embodiment provides a concentrated water reverse osmosis device and method, including a reverse osmosis module 1, which successively includes a filter 11, a high-pressure pump 12, and a reverse osmosis component 13 to form a reverse osmosis pipeline. The end of the reverse osmosis pipeline forms a recovery pipeline and a discharge pipeline. A collection module 2 is connected to the reverse osmosis module 1 and includes a first water tank 21 and a second water tank 22. The high-pressure pump 12 acts on the first water tank 21. The first water tank 21 is an ultrafiltration water tank. The water in the ultrafiltration water tank is filtered through an ultrafiltration membrane, which can effectively remove harmful substances such as bacteria, colloids, suspended solids, rust, and macromolecular organic matter in the water, providing high-quality feed water for the reverse osmosis system, thereby extending the service life of the reverse osmosis membrane.

[0025] The second water tank 22 is connected to the end of the reverse osmosis component 13. The second water tank 22 is a fresh water tank for collecting the water that meets the standards after reverse osmosis.

[0026] Further, there are several groups of reverse osmosis pipelines. Usually, multiple groups of reverse osmosis pipelines are set in the plant to perform reverse osmosis on the concentrated water in different pipelines. Therefore, there are several groups of reverse osmosis pipelines corresponding to different pipelines. These pipelines usually work partially, and the reverse osmosis pipelines in the remaining pipelines are not enabled. The reverse osmosis component 13 includes a filtering component 131 and a valve component V.

[0027] The filtering component 131 includes a first filtering layer 1311 and a second filtering layer 1312. The valve component V is arranged on the reverse osmosis pipeline and controls several groups of reverse osmosis pipelines to cooperate with each other. Both the first filtering layer 1311 and the second filtering layer 1312 are composed of filter membranes. The number of filter membranes in the first filtering layer 1311 is at least twice that of the second filtering layer 1312. Preferably, the ratio of the number of filter membranes in the first filtering layer 1311 to that in the second filtering layer 1312 of 2:1 can avoid concentration polarization and scaling problems while ensuring a high recovery rate. When the recovery rate reaches 75%, the system adopts a ratio of 2:1. At this time, the average recovery rate of the first stage is 52%, and that of the second stage is 48%. This ratio can effectively distribute the water production of each stage and ensure the balanced operation of the system.

[0028] Further, both the recovery pipeline and the discharge pipeline are located at the rear of the second filtering layer 1312, and the end of the recovery pipeline is connected to the second water tank 22. The valve component V includes a connection valve V1 arranged on the reverse osmosis pipeline between the first filtering layer 1311 and the second filtering layer 1312, a discharge valve V2 arranged on the discharge pipeline, and a product water valve V3 arranged on the recovery pipeline. A pipeline is added to connect several groups of discharge pipelines to the first water tank 21 at the rear of the product water valve V3 to form a circulation pipeline. Moreover, the valve assembly V also includes several groups of stop valves, and the stop valves are used to connect several groups of reverse osmosis pipelines for alternative use.

[0029] When reverse osmosis recovery of concentrated water is required, refer toFigure 1 As shown, some pipelines will be enabled. At this time, water is pumped by turning on the high-pressure pump 12 of the corresponding reverse osmosis pipeline. The water will pass through the filter 11. The filter 11 uses a security filter with a high precision, which can effectively remove the tiny impurities that may cause chemical reactions or scaling phenomena, thus maintaining the stable operation of the entire water treatment system. Therefore, part of the impurities will be filtered out when the medium-concentrated water reaches the filter 11. After that, the medium-concentrated water will reach the first filter layer 1311 and then be filtered through the second filter layer 1312. At the end of the second filter layer 1312, the water that meets the standard after filtration will be discharged into the second water tank 22 through the water production valve V3 for storage. This part of the water is qualified water, and the remaining water is filtered unqualified by the second permeation layer 1312 and discharged from the discharge valve V2.

[0030] Preferably, referring to Figure 2 As shown, for the reverse osmosis components 131 on some reverse osmosis pipelines, due to the independent operation of each pipeline, the rest of the osmosis components 131 will stop working, resulting in waste of resources. Therefore, the valve assembly V also includes a first stop valve V4 and a second stop valve V5 connected to any two sets of circulating pipelines, and a third stop valve V6 and a fourth stop valve V7 in the discharge pipeline in front of the discharge valve V2.

[0031] Specifically, by setting these valves, the filtering components 131 on different one or more sets of reverse osmosis pipelines can work for one or more sets of reverse osmosis pipelines at the same time. After connecting the filtering components 131 on an unenabled reverse osmosis pipeline to the filtering components 131 on the enabled reverse osmosis pipeline, this will change the enabled reverse osmosis pipeline from the original one set of first permeation layer 1311 plus one set of second permeation layer 1312 to one set of first permeation layer 1311 plus several sets of second permeation layer 1312, achieving a more preferable filtering effect. And the medium-concentrated water that fails to meet the filtration standard can also be returned to the first water tank 21 for multiple filtrations in circulation, which can achieve the effect of saving water resources.

[0032] All reverse osmosis pipelines are initially kept with all valves closed. By enabling one set of reverse osmosis pipelines and leaving another set of reverse osmosis pipelines unenabled, the enabled reverse osmosis pipeline can realize multiple filtrations of the medium-concentrated water through the filtering components 131 on the unenabled reverse osmosis pipeline by opening the connection valve V1, the water production valve V3, the third stop valve V6, the sixth stop valve V6, and the discharge valve V2 and the water production valve V3 of the other set of reverse osmosis pipelines.

[0033] Preferably, for the unactivated reverse osmosis pipeline, the water production valve V3 is closed through the second stop valve V5. After controlling the medium-concentration water circulation filtration, the water production valve V3 is opened and the first stop valve V4 is closed for collection, so as to repeatedly filter the medium-concentration water until the filtration reaches the standard, and then the water production valve V3 is opened to allow the water to enter the fresh water tank for collection. In this way, a more economical effect can be achieved. Moreover, the medium-concentration water is filtered through multiple sets of the second filter layer 1312, and finally, through the circulating osmosis of the overall reverse osmosis pipeline, it can enter the second water tank 22 for collection and storage until it reaches the qualified standard.

[0034] In summary, as Figure 2 shown, when the upper-layer reverse osmosis pipeline is activated, water is pumped from the first water tank 21 through the high-pressure pump 12. The extracted medium-concentration water will first pass through the filter 11, and some impurities will be filtered out to ensure that the impurities in the medium-concentration water will not block the subsequent pipeline. Subsequently, the medium-concentration water will enter the first filter layer 1311 for primary filtration. At this time, the qualified water will directly pass through the water production valve V3, and the unqualified water will pass through the second filter layer 1312 again for filtration. Similarly, the qualified water after filtration will pass through the water production valve V3. At this time, a part of the unqualified medium-concentration water can be discharged by closing the discharge valve V2 of the activated reverse osmosis pipeline group, opening the third stop valve V6 and the discharge valve V2 of the unactivated reverse osmosis pipeline group, so that the medium-concentration water passes through the first filter layer 1311, the second filter layer 1312 of the original pipeline and the second filter layer 1312 of the unactivated group. In this way, the unactivated second filter layer 1312 can also participate in the filtration work. At this time, the unqualified medium-concentration water after filtration will be discharged through the discharge valve V2 of the unactivated reverse osmosis pipeline, and the qualified water after filtration will enter the second water tank 22 through the water production valve V3 for collection and storage.

[0035] Furthermore, if the medium-concentration water still fails to meet the standard after passing through the osmosis module 13, the water production valve V3 can be closed, and the first stop valve V4 and the second stop valve V5 can be opened. At this time, the medium-concentration water will enter the first water tank 21 again to form a circulating reverse osmosis filtration until the medium-concentration water reaches the standard, and then the first stop valve V4 and the second stop valve V5 are closed, and the water production valve V3 is opened to collect and store the water.

[0036] Finally, it should be pointed out that the methods and devices described in detail above are only examples, and those skilled in the art can modify these examples in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A concentrated water reverse osmosis device, characterized in that: Comprising, A reverse osmosis module (1) which successively includes a filter (11), a high-pressure pump (12), and a reverse osmosis component (13) to form a reverse osmosis pipeline, and a plurality of groups of said reverse osmosis pipelines are provided; The output end of the reverse osmosis filtration component (13) includes a recovery pipeline and a discharge pipeline. The qualified solution after filtration by the reverse osmosis component (13) is discharged into the recovery pipeline, and the unqualified solution after filtration is discharged into the discharge pipeline; A collection module (2) which supplies a solution to the reverse osmosis line and recovers the solution of the reverse osmosis line, and includes a first water tank (21) and a second water tank (22). The high-pressure pump (12) pumps the solution into the first water tank (21), and the second water tank (22) is connected to the output end of the recovery pipeline.

2. The concentrated water reverse osmosis device according to claim 1, wherein: A plurality of groups of said reverse osmosis pipelines are provided, and the reverse osmosis component (13) includes a filtering component (131) and a valve component (V); The filtering component (131) includes a first filter layer (1311) and a second filter layer (1312). The valve component (V) is connected to the reverse osmosis pipeline to control the path of the reverse osmosis line and the connection between a plurality of groups of reverse osmosis pipelines.

3. The concentrated water reverse osmosis device according to claim 2, characterized in that: Both the first filter layer (1311) and the second filter layer (1312) are composed of filter membranes; The number of filter membranes of the first filter layer (1311) is at least twice the number of filter membranes of the second filter layer (1312).

4. The concentrated water reverse osmosis device according to claim 2 or 3, characterized in that: The recovery pipeline and the discharge pipeline are respectively connected to the output end of the second filter layer (1312) where the filtration is qualified and the output end where the filtration is unqualified, and the end of the recovery pipeline is connected to the second water tank (22).

5. The concentrated water reverse osmosis device according to claim 4, wherein: The valve component (V) includes a connection valve (V1) provided on the reverse osmosis pipeline between the first filter layer (1311) and the second filter layer (1312), a discharge valve (V2) provided on the discharge pipeline, and a product water valve (V3) provided on the recovery pipeline.

6. The concentrated water reverse osmosis device according to claim 5, wherein: A pipeline is added to the rear end of the product water valve (V3) of a plurality of groups of said discharge pipelines and connected to the first water tank (21) to form a circulation pipeline.

7. The reverse osmosis device for concentrated water according to claim 6, characterized in that: The valve assembly (V) further includes a plurality of groups of stop valves, and the stop valves are used to connect a plurality of groups of reverse osmosis pipelines for alternate use.

8. The concentrated water reverse osmosis device according to claim 7, characterized in that: The valve assembly (V) further includes a first stop valve (V4) and a second stop valve (V5) connected between any two groups of said circulation pipelines, and a third stop valve (V6) and a fourth stop valve (V7) at the front section of the discharge valve (V2) on the discharge pipeline.

9. A recovery method for a concentrated water reverse osmosis device, characterized in that: For the concentrated water reverse osmosis device according to any one of claims 1 to 8; and, in the initial state of all reverse osmosis pipelines, all valves are kept closed, and by enabling one group of said reverse osmosis pipelines, another group of reverse osmosis pipelines is not enabled; The enabled reverse osmosis pipeline passes the medium-concentrated water through one group of reverse osmosis lines and then enters the second filter layer (1312) in another group of reverse osmosis lines by opening the connection valve (V1), the product water valve (V3), the third stop valve (V6), the sixth stop valve (V6), and the discharge valve (V2) and the product water valve (V3) of another group of reverse osmosis pipelines, so as to perform secondary filtration on the medium-concentrated water.

10. The recovery method of the concentrated water reverse osmosis device according to claim 9, characterized in that: The unactivated reverse osmosis pipeline is controlled to close its water production valve (V3) through the second stop valve (V5), and after the medium-concentration water circulation filtration, the water production valve (V3) is opened and the first stop valve (V4) is closed for collection.

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