CN210814740U - Immersed ultrafiltration system with backwashing function - Google Patents

Abstract

The utility model provides an immersed ultrafiltration system with backwashing function, which comprises a plurality of membrane pools, wherein each membrane pool is internally provided with an ultrafiltration membrane element and is provided with a water production pump and a water production automatic valve, the water outlet of each water production pump is connected to a water production main pipeline provided with an automatic flow regulating valve, each membrane pool is provided with a backwashing branch pipeline and a backwashing automatic valve, the backwashing branch pipeline is connected with the water production main pipeline through a backwashing main pipeline, when any membrane pool needs back flushing, the water production automatic valve and the water production pump are closed, the back flushing automatic valve is opened, the automatic valves for producing water and the automatic valves for producing water of other membrane tanks are opened, the automatic valves for backwashing are closed, the opening degree of the automatic flow regulating valves is reduced, so that part of the purified water on the main water production pipeline enters the ultrafiltration membrane element in the membrane pool through the back washing main pipeline, the back washing branch pipeline corresponding to the membrane pool and the back washing automatic valve on the back washing branch pipeline. The utility model relates to a low, the area is little and system water is efficient.

Description

Immersed ultrafiltration system with backwashing function

The technical field is as follows:

the utility model relates to a water treatment technical field, in particular to submergence formula ultrafiltration system with back flush function.

Background art:

the immersed ultrafiltration device is suitable for large-scale water purification treatment, and an ultrafiltration membrane element in an ultrafiltration membrane tank of the immersed ultrafiltration device is attached with impurities and the like after being used for a period of time to influence water flux, so that the ultrafiltration membrane element needs to be backwashed timely to improve the production efficiency.

Because the conventional submerged ultrafiltration device in the industry usually adopts a method of independently arranging a backwashing pump for backwashing, the method needs the backwashing pump to take water from an ultrafiltration water production pool, and the water production pool cannot be built due to the limitation of part of engineering sites, and the produced water directly flows into a subsequent process system, so that the method cannot realize backwashing of ultrafiltration.

Inventor chengzaihui et al proposed a utility model patent (patent number CN 201720778741.1) entitled "an immersed ultrafiltration device", which does not need to be equipped with a separate backwash pump, but in the technology, the ultrafiltration water production pump is not only a water production pump for producing water but also a backwash pump for backwashing an ultrafiltration membrane element, which limits the flow rate of backwash, so that when the water quality of a water source is poor and the backwash flow rate needs to be increased, the flow rate cannot be increased; in addition, in the technology, water needs to be taken from an ultrafiltration water tank (also called a water production tank) during backwashing; in addition, the water production operation and the back flush operation of the technology can cause the frequent start and stop of the water production pump, the water production efficiency is low, and the working efficiency of the ultrafiltration device is indirectly reduced.

The utility model has the following contents:

in order to overcome the above problems, the present invention provides an immersion ultrafiltration system with backwash function, which has low design cost, small floor space and high water production efficiency.

Therefore, the utility model provides an submergence formula ultrafiltration system with back flush function, it includes a plurality of membrane cisterns, all be provided with ultrafiltration membrane element in every membrane cistern, and every membrane cistern all disposes respective product water pump, and, the delivery port of ultrafiltration membrane element and the water inlet of corresponding product water pump all are connected through producing the partial pipeline in every membrane cistern, all be provided with product water automatic valve on every product water partial pipeline, the delivery port of every product water pump all is connected to producing the water main pipeline, be provided with flow automatic regulating valve on this product water main pipeline, wherein, every membrane cistern still disposes respective back flush branch pipeline and installs the back flush automatic valve on back flush branch pipeline, each back flush branch pipeline is connected with product water main pipeline through back flush main pipeline, when any membrane cistern needs the back flush, this membrane cistern corresponding product water automatic valve and product water pump close, The corresponding back washing automatic valve is opened, the water production automatic valve and the water production pump corresponding to the other membrane pool are opened, the corresponding back washing automatic valve is closed, and the opening degree of the flow automatic adjusting valve is reduced, so that part of purified water on the water production main pipeline enters the ultrafiltration membrane element in the membrane pool through the back washing main pipeline, the back washing branch pipeline corresponding to the membrane pool and the back washing automatic valve on the back washing branch pipeline.

The utility model discloses an submergence formula ultrafiltration system that provides has the back flush function of mutual dashing: when a plurality of membrane tanks are arranged in the system, when one membrane tank is used for backwashing, other membrane tanks can still operate, and the system can be suitable for simultaneous operation and backwashing of the multiple membrane tank systems by switching valves and adjusting the opening degree of the valves on the water production main pipeline, and has high flexibility and good backwashing effect; the utility model can also save a production pool and a back washing pump, and realize good back washing effect of the immersed ultrafiltration device on the basis of saving occupied area and equipment cost; the utility model discloses a, the system flexibility is big.

Furthermore, a dosing device is arranged on the back washing main pipeline, and one set of dosing device can meet the back washing requirements of all the membrane tanks.

Still further, the plurality of membrane tanks includes at least two membrane tanks.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.

Description of the drawings:

the structure of the invention, together with further objects and advantages thereof, will best be understood from the following description taken in conjunction with the accompanying drawings, in which like reference characters identify like elements:

fig. 1 is a schematic structural diagram of an immersion type ultrafiltration system with backwashing function according to an embodiment of the present invention.

The specific implementation mode is as follows:

the following description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1, the immersed ultrafiltration system with backwashing function according to the embodiment of the present invention includes a first membrane tank 1, a second membrane tank 2, a third membrane tank 3, each membrane tank is provided with an ultrafiltration membrane element, i.e. a first ultrafiltration membrane element 10, a second ultrafiltration membrane element 20 and a third ultrafiltration membrane element 30, and are all provided with a corresponding water production pump, i.e. a first water production pump 11, a second water production pump 21 and a third water production pump 31, a water production automatic valve is arranged before each water production pump, i.e. a first water production automatic valve 13, a second water production automatic valve 23, a third water production automatic valve 33, water produced by each membrane tank is converged to a water production main pipeline 4, and a flow automatic regulating valve 7 is arranged on the water production main pipeline 4. Each membrane tank is also provided with corresponding back-flushing automatic valves, namely a first back-flushing automatic valve 16, a second back-flushing automatic valve 26 and a third back-flushing automatic valve 36.

As shown in fig. 1, taking a first membrane tank 1 as an example, three ultrafiltration membrane elements 10 are arranged in the first membrane tank 1, the water outlet of each ultrafiltration membrane element 10 in the first membrane tank 1 is connected with the water inlet of a first water production pump 11 through a first water production pipeline 14, a first water production automatic valve 13 is arranged on the first water production pipeline 14, and the water outlet of the first water production pump 11 is connected to a main water production pipeline 4. The first membrane tank 1 is also provided with a first backwashing branch pipeline 15, and a first backwashing automatic valve 16 is arranged on the first backwashing branch pipeline 15. The first backwashing branch pipeline 15 is connected with the water production main pipeline 4 through the backwashing main pipeline 5. The back flushing main pipeline 5 can be also provided with a dosing device 6, for example, one or more of acid, alkali, bactericide and the like can be added according to the specific requirements of water quality regulation to regulate the water quality. One set of chemical adding device 6 can simultaneously meet the back washing of each membrane pool. The second membrane tank 2 and the third membrane tank 3 are similar in case and will not be described one by one for the sake of brevity.

When the whole system is operated to produce water, the first back-flushing automatic valve 16, the second back-flushing automatic valve 26 and the third back-flushing automatic valve 36 are closed, the first water-producing automatic valve 13, the second water-producing automatic valve 23 and the third water-producing automatic valve 33, the automatic flow regulating valve 7 and the first water-producing pump 11, the second water-producing pump 21 and the third water-producing pump 31 are started, and the produced water (namely, purified water) flows into a subsequent process system through the main water-producing pipeline 4.

When any membrane tank needs backwashing, if the first membrane tank 1 needs backwashing, the first backwashing automatic valve 16 is opened, and the first water production pump 11 and the first water production automatic valve 13 are closed. At this time, the second membrane pool 2 and the third membrane pool 3 normally produce water, the back washing water amount is controlled by controlling the opening degree of the automatic flow regulating valve 7, namely, the opening degree is reduced, the back washing water (namely, the purified water from the main water production pipeline 4) backflushes each ultrafiltration membrane element 10 in the first membrane pool 1 through the main backflushing pipeline 5 and the first backflushing branch pipeline 15, and the residual purified water in the main water production pipeline 4 flows into a subsequent process system through the automatic flow regulating valve 7. When the backwashing of the first membrane tank 1 is finished, the first water production automatic valve 13 and the first water production pump 11 are opened, the first backwashing automatic valve 16 is closed, the flow automatic regulating valve 7 is fully opened, and each membrane tank normally operates to produce water;

when the second membrane tank 2 needs back flushing, the second back flushing automatic valve 26 is opened, and the second water production pump 21 and the second water production automatic valve 23 are closed. At this time, the first membrane tank 1 and the third membrane tank 3 normally produce water, and the backwashing water amount is controlled by controlling the opening degree of the automatic flow regulating valve 7. And (3) after the back flushing of the second membrane pool 2 is finished, opening the second water production automatic valve 23 and the second water production pump 21, closing the second back flushing automatic valve 26, and fully opening the automatic flow regulating valve 7, so that the membrane pools recover to produce water normally.

The back washing principle of the third membrane tank C is the same as that of the third membrane tank C.

Although the above-described embodiment is provided with three membrane tanks, each of which is provided with three ultrafiltration membrane elements, it should be understood that in other embodiments, the number of membrane tanks may be two, four or more, and the number of ultrafiltration membrane elements in each membrane tank may be varied as desired.

The utility model discloses a when the core lies in the back flush of one of them membrane cisterna, other membrane cisternas still can operate, through the degree of opening of switching valve and adjusting the water production main pipe on-road valve, both satisfied the requirement of the different back flush water yield of membrane cisterna, still save the construction cost in water production pond and the requirement of taking up an area, this utility model can be applicable to operation and back flush when many membrane cisterna systems, and the system flexibility is big.

While the invention has been described with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the above-described arrangements, including combinations of features disclosed herein either individually or in any combination as is evident from the appended claims, without departing from the spirit and scope of the invention. These variants and/or combinations fall within the technical field of the present invention and are intended to be protected by the following claims.

Claims (3)

1. An immersed ultrafiltration system with a backwashing function is characterized by comprising a plurality of membrane pools, wherein each membrane pool is internally provided with an ultrafiltration membrane element and is provided with a respective water production pump, a water outlet of the ultrafiltration membrane element in each membrane pool is connected with a water inlet of a corresponding water production pump through a water production branch pipeline, each water production branch pipeline is provided with a water production automatic valve, a water outlet of each water production pump is connected to a water production main pipeline, the water production main pipeline is provided with an automatic flow regulating valve, each membrane pool is also provided with a respective backwashing branch pipeline and a backwashing automatic valve arranged on the backwashing branch pipeline, and each backwashing branch pipeline is connected with the water production main pipeline through a backwashing main pipeline.

2. The submerged ultrafiltration system with backwash function as in claim 1, wherein a dosing device is provided on the backwash main conduit.

3. The submerged ultrafiltration system with backwash function of claim 1 or 2, wherein the plurality of membrane tanks comprises at least two of the membrane tanks.

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