CN219050914U

CN219050914U - Two-stage disc-tube type reverse osmosis membrane device

Info

Publication number: CN219050914U
Application number: CN202223195871.2U
Authority: CN
Inventors: 徐斌; 王元森; 张丹丹
Original assignee: BEIJING INNOGREEN TECHNOLOGY CO LTD
Current assignee: BEIJING INNOGREEN TECHNOLOGY CO LTD
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-23
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a two-stage disc tube type reverse osmosis membrane device, which comprises a two-stage disc tube type reverse osmosis membrane device, wherein the two-stage disc tube type reverse osmosis membrane device comprises a first-stage DTRO membrane system, a second-stage DTRO membrane system, a filter and a high-pressure pump, a water outlet of the filter is communicated with a water inlet of the high-pressure pump, a water outlet of the high-pressure pump is communicated with a water inlet of the first-stage DTRO membrane system, a circulating pump is arranged between the high-pressure pump and the first-stage DTRO membrane system, a water outlet of the first-stage DTRO membrane system is communicated with a water inlet of the second-stage DTRO membrane system through a first water production pipeline, and a concentrated water outlet of the first water production pipeline is communicated with a concentrated water outlet of the second-stage DTRO membrane system through a concentrated water circulation pipeline and then is communicated with a water inlet of the filter through a concentrated water return pipeline. The two-stage DTRO membrane system of the two-stage disc-tube type reverse osmosis membrane device shares a filter and a high-pressure pump, so that the filter and the high-pressure pump of the two-stage DTRO membrane system are omitted, and the system requirement can be met only by slightly improving the pressure of the high-pressure pump.

Description

Two-stage disc-tube type reverse osmosis membrane device

Technical Field

The utility model relates to the technical field of water treatment, in particular to a two-stage disc-tube type reverse osmosis membrane device.

Background

The dish tubular reverse osmosis membrane (DTRO) system adopts an open flow channel design form, has three characteristics of wide channels, short flow and turbulence, and can directly treat high-concentration and high-pollution feed liquid. The method has low requirement on the quality of the inlet water and good treatment effect, and is widely applied to systems such as garbage filtrate treatment, industrial wastewater zero emission, seawater desalination and the like.

In order to ensure that the produced water reaches the standard, a two-stage DTRO membrane system is often arranged, namely, a second-stage DTRO system is used for treating the produced water of the first-stage DTRO, so that the quality of the produced water is improved. The traditional two-stage DTRO membrane system is two sets of relatively independent DTRO systems, namely each stage of DTRO is provided with independent high-pressure membrane columns, high-pressure pump sets, valve meters and the like. However, in actual operation, the high-pressure pump of the second-stage DTRO membrane system directly receives the produced water of the first-stage DTRO membrane system, so that the water yield of the second-stage pump is often affected by the operation of the first-stage membrane system, the phenomenon that the high-pressure pump is insufficient in water yield and the membrane system cannot operate effectively occurs.

Disclosure of Invention

The utility model aims to provide a two-stage disc-tube type reverse osmosis membrane device.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a two-stage dish tubular reverse osmosis membrane device, includes one-level DTRO membrane system, second grade DTRO membrane system, filter and high-pressure pump, the delivery port of filter communicates with the water inlet of high-pressure pump, and the delivery port of high-pressure pump communicates with the water inlet of one-level DTRO membrane system, be provided with the circulating pump between high-pressure pump and the one-level DTRO membrane system, the delivery port of one-level DTRO membrane system communicates through producing water pipeline one with the water inlet of second grade DTRO membrane system, produce through concentrate return line and filter's water inlet intercommunication after communicating through concentrate circulation pipeline two between the concentrate export of water pipeline one and second grade DTRO membrane system.

Further, a second-stage servo regulating valve and a second-stage high-pressure electric valve are arranged on the concentrated water backflow pipeline, and the second-stage servo regulating valve and the second-stage high-pressure electric valve are arranged in parallel.

Further, the high-pressure pump is communicated with a concentrated water outlet of the primary DTRO membrane system through a concentrated water circulation pipeline I and then enters a concentrated water tank.

Further, the water outlet of the secondary DTRO membrane system is communicated with the water production tank through a second water production pipeline.

Further, a water inlet of the filter is communicated with the water inlet tank through a high-pressure pump water inlet pipeline, and the concentrated water backflow pipeline is communicated with the high-pressure pump water inlet pipeline.

Further, the high-pressure pump water inlet pipeline and the second water production pipeline are provided with flow meters.

Further, a first-stage servo regulating valve and a first-stage high-pressure electric valve are arranged on the first concentrated water circulating pipeline, and the first-stage servo regulating valve and the first-stage high-pressure electric valve are arranged in parallel.

According to the technical scheme, the utility model has the following beneficial effects:

the two-stage DTRO membrane system shares a filter and a high-pressure pump, so that the filter and the high-pressure pump of the two-stage DTRO membrane system are omitted, and the system requirement can be met only by slightly improving the pressure of the high-pressure pump;

the water produced by the primary DTRO membrane system directly enters the secondary DTRO membrane system for treatment, and the serial pipeline has no equipment, so that the system operation risk is simplified and reduced, a set of high-pressure meters and partial high-pressure pipe fittings positioned in the secondary DTRO membrane system are omitted, and the system investment cost is greatly saved;

and (3) circulating part of the concentrated water of the secondary DTRO membrane system to a water inlet of the secondary DTRO membrane system so as to maintain high scouring speed of the membrane surface. Part of the concentrated water flows back to the front section of the system to supplement the water quantity of the front section of the system, and meanwhile, the concentrated water of the secondary DTRO membrane system is cleaner, so that the dilution effect on the water coming from the system can be achieved, and the pollution load of the primary DTRO membrane system is relieved.

Drawings

FIG. 1 is a schematic diagram of a system according to the present utility model.

In the figure: the system comprises a primary DTRO membrane system 1, a secondary DTRO membrane system 2, a filter 3, a high-pressure pump 4, a circulating pump 5, a primary servo regulating valve 6, a primary high-pressure electric valve 7, a secondary servo regulating valve 8, a secondary high-pressure electric valve 9, a first concentrated water pipeline 10, a first concentrated water circulating pipeline 11, a first water production pipeline 12, a second concentrated water pipeline 13, a second concentrated water circulating pipeline 14, a concentrated water return pipeline 15, a second water production pipeline 16, a high-pressure pump water inlet pipeline 17 and a flowmeter 18.

Detailed Description

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, the utility model provides a two-stage disc-tube reverse osmosis membrane device, which comprises a primary DTRO membrane system 1, a secondary DTRO membrane system 2, a filter 3, a high-pressure pump 4, a circulating pump 5, a primary servo regulating valve 6, a primary high-pressure electric valve 7, a secondary servo regulating valve 8, a secondary high-pressure electric valve 9, a first concentrated water pipeline 10, a first concentrated water circulating pipeline 11, a first water producing pipeline 12, a second concentrated water pipeline 13, a second concentrated water circulating pipeline 14, a concentrated water return pipeline 15, a second water producing pipeline 16, a high-pressure pump water inlet pipeline 17 and a flowmeter 18, wherein one end of the high-pressure pump water inlet pipeline 17 is communicated with a water inlet tank, the other end of the high-pressure pump water inlet pipeline 17 is communicated with a water inlet of the filter 3, a water outlet of the high-pressure pump 4 is communicated with a water inlet of the high-pressure pump 4, a circulating pump 5 is arranged between the high-pressure pump 4 and the primary DTRO membrane system 1, the primary DTRO membrane system 1 is communicated with the water outlet of the primary DTRO membrane system 2 through the first concentrated water pipeline 12, a first concentrated water outlet of the primary DTRO membrane system 1 is connected with the first concentrated water outlet of the first high-pressure electric valve 6, and the first high-pressure electric valve 7 is arranged after the primary DTRO membrane system 1 is connected with the first concentrated water circulating valve 11 through the first concentrated water circulating pipeline 6.

The concentrated water outlet of the secondary DTRO membrane system 2 is connected with a concentrated water pipeline II 13, and the concentrated water pipeline II 13 is communicated with the water inlet of the filter 4 through a concentrated water return pipeline 15 after being communicated with a water production pipeline I12 through a concentrated water circulation pipeline II 14. The concentrated water return pipeline 15 is provided with a secondary servo regulating valve 8 and a secondary high-pressure electric valve 9, and the secondary servo regulating valve 8 and the secondary high-pressure electric valve 9 are connected in parallel.

The water outlet of the secondary DTRO membrane system 2 is communicated with a water production tank through a second water production pipeline 16, a concentrated water return pipeline 15 is communicated with a high-pressure pump water inlet pipeline 17, and flow meters 18 are arranged on the high-pressure pump water inlet pipeline 17 and the second water production pipeline 16.

Working principle: after the filter is used for filtering, the high-pressure pump pressurizes water and then enters the first-stage DTRO membrane system, the water produced by the first-stage DTRO membrane system directly enters the second-stage DTRO membrane system for treatment, the two-stage DTRO membrane system shares the filter and the high-pressure pump, the filter and the high-pressure pump of the second-stage DTRO membrane system are omitted, the water produced by the second-stage DTRO membrane system enters the water production tank and is discharged after reaching standards, the water produced by the first-stage DTRO membrane system directly enters the second-stage DTRO membrane system for treatment, no equipment is arranged in a series pipeline, the running risk of the system is simplified and reduced, a set of high-pressure instrument and partial high-pressure pipe fittings positioned in the second-stage DTRO membrane system are omitted, and the investment cost of the system is greatly saved. The concentrated water of the primary DTRO membrane system is partially circulated to the front end of the circulating pump, and partially discharged to the concentrated water tank. And part of concentrated water of the secondary DTRO membrane system is circulated to a water inlet of the secondary DTRO membrane system, and part of concentrated water flows back to a water inlet pipeline of a high-pressure pump at the front section of the system. The concentrated water of the secondary DTRO membrane system is partially circulated to the water inlet of the secondary DTRO membrane system so as to keep high scouring speed on the surface of the membrane and partially return to the front section of the system to supplement the water quantity of the front section of the system, and meanwhile, the concentrated water of the secondary DTRO membrane system is cleaner and can dilute the water coming from the system to relieve the pollution load of the primary DTRO membrane system.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a two-stage dish tubular reverse osmosis membrane device, its characterized in that includes one-level DTRO membrane system (1), second grade DTRO membrane system (2), filter (3) and high-pressure pump (4), the delivery port of filter (3) communicates with the water inlet of high-pressure pump (4), and the delivery port of high-pressure pump (4) communicates with the water inlet of one-level DTRO membrane system (1), be provided with circulating pump (5) between high-pressure pump (4) and one-level DTRO membrane system (1), the delivery port of one-level DTRO membrane system (1) communicates through producing water pipeline one (12) with the water inlet of second grade DTRO membrane system (2), produce through concentrate return line two (15) and the water inlet intercommunication of filter (3) after communicating through concentrate circulation pipeline two (14) between the concentrate export of water pipeline one (12) and second grade DTRO membrane system (2).

2. A two-stage disc tube reverse osmosis membrane device according to claim 1, wherein: the concentrated water backflow pipeline (15) is provided with a secondary servo regulating valve (8) and a secondary high-pressure electric valve (9), and the secondary servo regulating valve (8) and the secondary high-pressure electric valve (9) are arranged in parallel.

3. A two-stage disc tube reverse osmosis membrane device according to claim 1, wherein: the high-pressure pump (4) is communicated with a concentrated water outlet of the primary DTRO membrane system (1) through a concentrated water circulating pipeline I (11) and then enters the concentrated water tank.

4. A two-stage disc tube reverse osmosis membrane device according to claim 1, wherein: and the water outlet of the second-stage DTRO membrane system (2) is communicated with a water production tank through a second water production pipeline (16).

5. The two-stage disc tube type reverse osmosis membrane device according to claim 4, wherein: the water inlet of the filter (3) is communicated with the water inlet tank through a high-pressure pump water inlet pipeline (17), and the concentrated water backflow pipeline (15) is communicated with the high-pressure pump water inlet pipeline (17).

6. A two-stage disc tube reverse osmosis membrane device according to claim 5, wherein: and the high-pressure pump water inlet pipeline (17) and the water production pipeline II (16) are provided with flow meters (18).

7. A two-stage disc tube reverse osmosis membrane device according to claim 3, wherein: the first concentrated water circulating pipeline (11) is provided with a first-stage servo regulating valve (6) and a first-stage high-pressure electric valve (7), and the first-stage servo regulating valve (6) and the first-stage high-pressure electric valve (7) are arranged in parallel.