CN215742902U - Nanofiltration wastewater used for backwashing of ultrafiltration membrane - Google Patents
Nanofiltration wastewater used for backwashing of ultrafiltration membrane Download PDFInfo
- Publication number
- CN215742902U CN215742902U CN202121513715.9U CN202121513715U CN215742902U CN 215742902 U CN215742902 U CN 215742902U CN 202121513715 U CN202121513715 U CN 202121513715U CN 215742902 U CN215742902 U CN 215742902U
- Authority
- CN
- China
- Prior art keywords
- nanofiltration
- ultrafiltration
- water
- backwashing
- membrane filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to the field of water treatment, in particular to a device for backwashing nanofiltration wastewater by using an ultrafiltration membrane, which comprises a normal water production pipeline, wherein untreated water firstly passes through a pre-filter, then passes through an ultrafiltration membrane filter and finally passes through a nanofiltration membrane filter to generate clear water to finish filtration from water inlet of the normal water production pipeline; a backwashing pipeline of the nanofiltration membrane filter is used for allowing clear water to enter from a nanofiltration water outlet of the nanofiltration membrane filter and to be discharged from a nanofiltration wastewater outlet; the ultrafiltration membrane filter backflushs the pipeline, and water discharged from the nanofiltration wastewater port enters from an ultrafiltration water outlet of the ultrafiltration membrane filter and is discharged from an ultrafiltration wastewater port; the front filter backflush pipeline is used for allowing water discharged from the ultrafiltration waste water outlet to enter from the front filtering water outlet and then to be discharged from the front filtering water inlet; the switching among the pipelines is realized by the on-off of a plurality of water inlet valves, water outlet valves, backwashing valves and booster pumps. After adopting above-mentioned technical scheme, can reduce waste water discharge, improve the utilization ratio of water.
Description
Technical Field
The utility model relates to the field of water treatment, in particular to a device for backwashing an ultrafiltration membrane by using nanofiltration wastewater.
Background
The drinking water film treatment technology is widely applied, the adopted filtering membrane comprises an ultrafiltration membrane, a nanofiltration membrane or a combination of the ultrafiltration membrane and the nanofiltration membrane, prefilters such as sand filtration or overlapped filtration and the like can be further adopted in front of the ultrafiltration membrane (the prefilters are divided according to the pore size, the filtering pore size of the prefilters is larger than that of the ultrafiltration membrane and is larger than that of the nanofiltration membrane), the filtering devices can generate waste water in the filtering process and can be generally directly discharged, and meanwhile, the filtering devices need to be washed and backwashed irregularly, consume more water, reduce the utilization rate of the water and cause waste of water resources.
Therefore, the inventor further researches the ultrafiltration membrane backwashing device to develop nanofiltration wastewater, and the device is produced by the method.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for backwashing an ultrafiltration membrane by using nanofiltration wastewater, which can reduce wastewater discharge and improve the utilization rate of water.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a device for backwashing nanofiltration wastewater on an ultrafiltration membrane comprises
The normal water production pipeline is from water inlet, untreated water firstly passes through the pre-filter, then passes through the ultrafiltration membrane filter and finally passes through the nanofiltration membrane filter to generate clear water to finish filtering;
a backwashing pipeline of the nanofiltration membrane filter is used for allowing clear water to enter from a nanofiltration water outlet of the nanofiltration membrane filter and to be discharged from a nanofiltration wastewater outlet;
the ultrafiltration membrane filter backflushs the pipeline, and water discharged from the nanofiltration wastewater port enters from an ultrafiltration water outlet of the ultrafiltration membrane filter and is discharged from an ultrafiltration wastewater port;
the front filter backflush pipeline is used for allowing water discharged from the ultrafiltration waste water outlet to enter from the front filtering water outlet and then to be discharged from the front filtering water inlet;
the switching among the pipelines is realized by the on-off of a plurality of water inlet valves, water outlet valves, backwashing valves and booster pumps.
Because the wastewater of the nanofiltration membrane filter is also filtered by the ultrafiltration membrane filter, namely the particle size of impurities in the wastewater of the nanofiltration membrane filter is smaller than the filter pore size of the ultrafiltration membrane filter, the problem of blockage can not be caused by backwashing the ultrafiltration membrane filter by the wastewater of the nanofiltration membrane filter, and the backwashing of the front filter by the wastewater of the ultrafiltration membrane filter is also feasible, so that the wastewater discharge can be reduced, and the water utilization rate can be improved.
Furthermore, the normal water production pipeline controls water inflow through a water inlet valve, enters the pre-filter from the pre-filtering water inlet, is discharged through the pre-filtering water outlet, then enters the ultrafiltration membrane filter from the ultrafiltration water inlet through a pre-filtering water outlet valve and an ultrafiltration water inlet valve, ultrafiltration wastewater is discharged from the ultrafiltration wastewater outlet through an ultrafiltration water discharge valve, ultrafiltration water is discharged from the ultrafiltration water outlet of the ultrafiltration membrane filter, enters the nanofiltration membrane filter from the nanofiltration water inlet through an ultrafiltration water outlet valve and a nanofiltration water inlet valve, nanofiltration wastewater is discharged from the nanofiltration wastewater outlet through a nanofiltration water discharge valve, and nanofiltration water is input into the clear water tank from the nanofiltration water outlet through a water outlet valve.
And furthermore, on the premise of closing a normal water production pipeline, a backwashing pipeline of the nanofiltration membrane filter is used for leading a pipeline from the clean water tank to pass through a nanofiltration cleaning water inlet valve, passing through a nanofiltration booster pump, entering from a nanofiltration water outlet of the nanofiltration membrane filter through a nanofiltration backwashing valve and then discharging from a nanofiltration wastewater outlet, and the nanofiltration wastewater is directly discharged from a nanofiltration water discharge valve or is backwashed to the ultrafiltration membrane filter through an ultrafiltration backwashing valve.
The wastewater after the reverse washing of the nanofiltration membrane filter can be used for carrying out the reverse washing of the ultrafiltration membrane filter.
Further, on the premise of closing a normal water production pipeline, or leading a pipeline from a nanofiltration wastewater port of the nanofiltration membrane filter to a first ultrafiltration backwashing valve, and then entering the ultrafiltration membrane filter from an ultrafiltration water outlet to be backwashed; or a pipeline is led from the clean water tank, passes through the ultrafiltration clean water inlet valve, is assisted by the ultrafiltration booster pump, passes through the second ultrafiltration backwashing valve, and enters the ultrafiltration membrane filter from the ultrafiltration water outlet for backwashing.
The wastewater after the reverse washing of the nanofiltration membrane filter can be used for carrying out the reverse washing on the ultrafiltration membrane filter, and the clear water in a clear water tank can also be directly used for carrying out the reverse washing on the ultrafiltration membrane filter.
Furthermore, a front filter backwashing pipeline leads a pipeline from an ultrafiltration waste water port of the ultrafiltration membrane filter to enter from a front filtering water outlet of the front filter through a front filtering backwashing valve on the premise of closing a normal water production pipeline, and backwashing is carried out on the front filter.
The waste water after the reverse washing of the ultrafiltration membrane filter can be used for carrying out the reverse washing of the front filter.
Furthermore, the ultrafiltration membrane filter circulation forward washing pipeline is opened on the premise of closing the normal water production pipeline, clear water is input from a clear water tank through an ultrafiltration booster pump, enters through an ultrafiltration water inlet of the ultrafiltration membrane filter and is discharged from an ultrafiltration waste water outlet, and circulation forward washing is carried out under the action of the ultrafiltration booster pump through an ultrafiltration circulating valve.
After the water production pipeline and the backwashing pipeline are closed, the ultrafiltration membrane filter can be subjected to circulating forward washing by using the forward washing circulating pipeline.
And further, a nanofiltration membrane filter circulating forward washing pipeline is opened on the premise of closing a normal water production pipeline, clear water is input from a clear water tank through a nanofiltration booster pump, enters through a nanofiltration water inlet of the nanofiltration membrane filter, is discharged from a nanofiltration waste water outlet, passes through a nanofiltration flushing valve, and is subjected to circulating forward washing under the action of the nanofiltration booster pump.
After the water production pipeline and the backwashing pipeline are closed, the forward washing circulating pipeline can be used for performing circulating forward washing on the nanofiltration membrane filter.
After adopting the scheme, compared with the prior art, the utility model has the following advantages:
the utilization rate of water resources is improved, the wastewater discharge is reduced, the utilization rate of water treatment equipment is also improved, and the design and manufacturing cost of water treatment is greatly saved.
Drawings
FIG. 1 is a schematic piping diagram of the present invention;
description of the reference symbols
A water inlet valve 1, a prefiltration drain valve 2, a prefiltration water outlet valve 3, an ultrafiltration circulating valve 4,
an ultrafiltration cleaning water inlet valve 5, a front filter 6, a front filtering water inlet 61, a front filtering water outlet 62,
an ultrafiltration membrane filter 7, an ultrafiltration waste water inlet 71, an ultrafiltration water outlet 72, an ultrafiltration water inlet 73,
a nanofiltration membrane filter 8, a nanofiltration waste water port 81, a nanofiltration water outlet 82, a nanofiltration water inlet 83,
a pre-filtering backwashing valve 9, an ultrafiltration water inlet valve 10, a second ultrafiltration backwashing valve 11,
an ultrafiltration water outlet valve 12, a nanofiltration flushing valve 13, an ultrafiltration drain valve 14,
a first ultrafiltration backwashing valve 15, a nanofiltration drain valve 16, a nanofiltration cleaning water inlet valve 17,
an ultrafiltration booster pump 18, a nanofiltration water inlet valve 19, a nanofiltration backwashing valve 20, a water outlet valve 21,
a nanofiltration booster pump 22 and a clean water tank 23.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments.
As shown in the figure, the nanofiltration wastewater is used for an ultrafiltration membrane backwashing device, a filter arranged at the starting end of the whole device is a front filter 6, a front filter water inlet 61 of the front filter 6 is respectively connected with a water inlet valve 1 and a front filter drain valve 2, and a front filter water outlet 62 of the front filter 6 is respectively connected with a front filter backwashing valve 9 and an ultrafiltration circulating valve 4 through a front filter water outlet valve 3.
One pipeline connected with the ultrafiltration circulating valve 4 is led out from a clean water tank 23 and is controlled by an ultrafiltration cleaning water inlet valve 5, the other pipeline connected with the ultrafiltration circulating valve 4 enters an ultrafiltration membrane filter 7 through an ultrafiltration booster pump 18 and an ultrafiltration water inlet valve 10, and meanwhile, the pipeline controlled by the ultrafiltration cleaning water inlet valve 5 is also connected with the ultrafiltration booster pump 18.
The ultrafiltration inlet 73 of the ultrafiltration membrane filter 7 positioned at the middle position is controlled by an ultrafiltration inlet valve 10, the ultrafiltration waste water inlet 71 of the ultrafiltration membrane filter is respectively connected with the pre-filtration backwashing valve 9 and the ultrafiltration drain valve 14, and the ultrafiltration outlet 72 of the ultrafiltration membrane filter is controlled by an ultrafiltration outlet valve 12. One pipeline of the ultrafiltration water outlet valve 12 is connected with the ultrafiltration booster pump 18 through a second ultrafiltration backwashing valve 11, the other pipeline of the ultrafiltration water outlet valve is connected with the nanofiltration wastewater outlet 81 of the nanofiltration membrane filter 8 through a first ultrafiltration backwashing valve 15, the three pipelines of the ultrafiltration water outlet valve are respectively connected with a clean water tank 23 and a nanofiltration booster pump 22 through a nanofiltration flushing valve 13, and the clean water tank 23 is controlled to be connected with the nanofiltration booster pump 22 through a nanofiltration cleaning water inlet valve 17.
Similarly, the nanofiltration booster pump 22 is respectively connected with the nanofiltration water inlet 83 and the nanofiltration water outlet 82 of the ultrafiltration membrane filter 7, the nanofiltration water inlet 83 of the nanofiltration membrane filter 8 is controlled by a nanofiltration water inlet valve 191, the nanofiltration booster pump 22 and the nanofiltration water outlet 82 are controlled by a nanofiltration backwash valve 20, the nanofiltration waste water outlet 81 is respectively connected with the nanofiltration water discharge valve 16 and the first ultrafiltration backwash valve 15, and the nanofiltration water outlet 82 is finally connected with the clean water tank 23 through a water outlet valve 21.
During normal water production, untreated water enters from the water inlet valve 1, enters from the pre-filtering water inlet 61 of the pre-filter 6, is output from the pre-filtering water outlet 62, completes primary filtration, enters from the ultrafiltration water inlet 73 of the ultrafiltration membrane through the pre-filtering water outlet valve 3, the ultrafiltration circulating valve 4, the ultrafiltration booster pump 18 and the ultrafiltration water inlet valve 10, is discharged from the ultrafiltration wastewater outlet 71 through the ultrafiltration drain valve 14 after secondary filtration, and ultrafiltration water enters from the ultrafiltration water outlet 72 through the ultrafiltration water outlet valve 12, the nanofiltration flush valve 13, the nanofiltration booster pump 22 and the nanofiltration water inlet valve 191, enters from the nanofiltration water inlet 83 of the nanofiltration membrane filter 8, is discharged from the nanofiltration wastewater outlet 81 and the nanofiltration drain valve 16 after tertiary filtration, and is input into the clear water tank 23 through the water outlet valve, and the rest backwashing valves are in a closed state.
During backwashing, the method for the highest utilization rate of wastewater comprises the steps of pumping water from a clean water tank 23 through a nanofiltration booster pump 22, entering a nanofiltration membrane filter 8 through a nanofiltration backwash valve 20 from a nanofiltration water outlet 82, discharging backwash liquor from a nanofiltration wastewater outlet 81, passing through a first ultrafiltration backwash valve 15, entering an ultrafiltration membrane filter 7 through an ultrafiltration water outlet 72 through an ultrafiltration water outlet valve 12, discharging the backwash liquor from an ultrafiltration wastewater outlet 71, and backwashing the front filter 6 through a front filtration backwash valve 9 and a front filtration water outlet valve 3, wherein the valves not related to the backwashing route are closed.
Or the clear water in the clear water tank 23 can be directly introduced to backwash the ultrafiltration membrane filter 7, specifically, the clear water is pumped by the ultrafiltration booster pump 18 and enters the ultrafiltration membrane filter 7 through the second ultrafiltration backwash valve 11 to backwash.
The circulating forward washing of the ultrafiltration membrane filter 7 and the circulating forward washing of the nanofiltration membrane filter 8 can be realized, and the method specifically comprises the following steps:
and (3) circulating forward washing of the ultrafiltration membrane filter 7, closing the pre-filtration water outlet valve 3 and the ultrafiltration water outlet valve 12, opening the pre-filtration backwashing valve 9, and realizing circulating forward washing of the ultrafiltration membrane filter 7 under the action of the ultrafiltration booster pump 18.
And (3) circulating forward washing of the nanofiltration membrane filter 8, closing the ultrafiltration backwashing valve, the ultrafiltration water outlet valve 12 and the water outlet valve, opening the nanofiltration backwashing valve 20, and realizing circulating forward washing of the nanofiltration membrane filter 8 under the action of the nanofiltration booster pump 22.
All the water treatment, backwashing and forward washing pipelines can be realized in the same device, so that the utilization rate of water resources is improved, the utilization rate of water treatment equipment is also improved, and the design and manufacturing cost of water treatment is greatly saved.
The above description is only an embodiment of the present invention, and all the terms such as "upper", "lower", "left", "right", "middle", etc. in the present invention are used as reference and not absolutely limited, and all the insubstantial modifications made by the present invention shall fall within the scope of infringing the present invention.
Claims (7)
1. The nanofiltration wastewater is used for an ultrafiltration membrane backwashing device, and is characterized in that: comprises that
The normal water production pipeline is from water inlet, untreated water firstly passes through the pre-filter, then passes through the ultrafiltration membrane filter and finally passes through the nanofiltration membrane filter to generate clear water to finish filtering;
a backwashing pipeline of the nanofiltration membrane filter is used for allowing clear water to enter from a nanofiltration water outlet of the nanofiltration membrane filter and to be discharged from a nanofiltration wastewater outlet;
the ultrafiltration membrane filter backflushs the pipeline, and water discharged from the nanofiltration wastewater port enters from an ultrafiltration water outlet of the ultrafiltration membrane filter and is discharged from an ultrafiltration wastewater port;
the front filter backflush pipeline is used for allowing water discharged from the ultrafiltration waste water outlet to enter from the front filtering water outlet and then to be discharged from the front filtering water inlet;
the switching among the pipelines is realized by the on-off of a plurality of water inlet valves, water outlet valves, backwashing valves and booster pumps.
2. The nanofiltration wastewater used for backwashing the ultrafiltration membrane according to claim 1, wherein the nanofiltration wastewater used for backwashing the ultrafiltration membrane comprises: the normal water production pipeline controls water inflow through a water inlet valve, enters a pre-filter from a pre-filtering water inlet, is discharged through a pre-filtering water outlet, then enters an ultrafiltration membrane filter from an ultrafiltration water inlet through a pre-filtering water outlet valve and an ultrafiltration water inlet valve, ultrafiltration wastewater is discharged from an ultrafiltration wastewater inlet through an ultrafiltration drain valve, ultrafiltration water is discharged from an ultrafiltration water outlet of the ultrafiltration membrane filter, enters a nanofiltration membrane filter from a nanofiltration water inlet through an ultrafiltration water outlet valve and a nanofiltration water inlet valve, nanofiltration wastewater is discharged from a nanofiltration wastewater inlet through a nanofiltration drain valve, and nanofiltration water is input into a clear water tank from a nanofiltration water outlet through a water outlet valve.
3. The nanofiltration wastewater used for backwashing the ultrafiltration membrane according to claim 1, wherein the nanofiltration wastewater used for backwashing the ultrafiltration membrane comprises: and a nanofiltration membrane filter backwashing pipeline, wherein on the premise of closing a normal water production pipeline, a pipeline is guided from a clean water tank to a nanofiltration cleaning water inlet valve, passes through a nanofiltration booster pump, enters from a nanofiltration water outlet of the nanofiltration membrane filter through a nanofiltration backwashing valve, and is discharged from a nanofiltration wastewater outlet, and the nanofiltration wastewater is directly discharged from a nanofiltration water discharge valve or is backwashed to the ultrafiltration membrane filter through an ultrafiltration backwashing valve.
4. The nanofiltration wastewater used for backwashing the ultrafiltration membrane according to claim 1, wherein the nanofiltration wastewater used for backwashing the ultrafiltration membrane comprises: the ultrafiltration membrane filter backwashing pipeline is guided from a nanofiltration wastewater port of the nanofiltration membrane filter to a first ultrafiltration backwashing valve through a pipeline on the premise of closing a normal water production pipeline, and enters the ultrafiltration membrane filter from an ultrafiltration water outlet to be backwashed; or a pipeline is led from the clean water tank, passes through the ultrafiltration clean water inlet valve, is assisted by the ultrafiltration booster pump, passes through the second ultrafiltration backwashing valve, and enters the ultrafiltration membrane filter from the ultrafiltration water outlet for backwashing.
5. The nanofiltration wastewater used for backwashing the ultrafiltration membrane according to claim 1, wherein the nanofiltration wastewater used for backwashing the ultrafiltration membrane comprises: and the front filter backwashing pipeline is used for guiding a pipeline from an ultrafiltration wastewater port of the ultrafiltration membrane filter to enter from a front filtering water outlet of the front filter through a front filtering backwashing valve on the premise of closing a normal water production pipeline, and backwashing the front filter.
6. The nanofiltration wastewater used for backwashing the ultrafiltration membrane according to claim 1, wherein the nanofiltration wastewater used for backwashing the ultrafiltration membrane comprises: the circulating forward washing pipeline of the ultrafiltration membrane filter is characterized in that an ultrafiltration cleaning water inlet valve is opened on the premise of closing a normal water production pipeline, clean water is input from a clean water tank through an ultrafiltration booster pump, enters through an ultrafiltration water inlet of the ultrafiltration membrane filter and is discharged from an ultrafiltration waste water outlet, and the circulating forward washing is carried out under the action of the ultrafiltration booster pump through an ultrafiltration circulating valve.
7. The nanofiltration wastewater used for backwashing the ultrafiltration membrane according to claim 1, wherein the nanofiltration wastewater used for backwashing the ultrafiltration membrane comprises: the nanofiltration membrane filter circulation forward washing pipeline is characterized in that a nanofiltration washing water inlet valve is opened on the premise of closing a normal water production pipeline, clear water is input from a clear water tank through a nanofiltration booster pump, enters through a nanofiltration water inlet of the nanofiltration membrane filter, is discharged from a nanofiltration wastewater outlet, passes through a nanofiltration flushing valve, and is subjected to circulation forward washing under the action of the nanofiltration booster pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121513715.9U CN215742902U (en) | 2021-07-05 | 2021-07-05 | Nanofiltration wastewater used for backwashing of ultrafiltration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121513715.9U CN215742902U (en) | 2021-07-05 | 2021-07-05 | Nanofiltration wastewater used for backwashing of ultrafiltration membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215742902U true CN215742902U (en) | 2022-02-08 |
Family
ID=80103890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121513715.9U Active CN215742902U (en) | 2021-07-05 | 2021-07-05 | Nanofiltration wastewater used for backwashing of ultrafiltration membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215742902U (en) |
-
2021
- 2021-07-05 CN CN202121513715.9U patent/CN215742902U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205917088U (en) | Water purification system with positive washing function of RO membrane pure water and return of waste water utilization | |
| CN106186193A (en) | Anti-penetration water purifier | |
| CN207533061U (en) | Positive backwash water cleaning systems | |
| CN103288177B (en) | Continuous membrane filtration system and water treatment method | |
| CN204198519U (en) | Water purification system | |
| CN206444461U (en) | A kind of water manufacturing system of utilization pure water rinsing milipore filter | |
| CN106348395A (en) | Water purifier system and control method for controlling same | |
| CN203922880U (en) | A kind of water-purifying machine | |
| CN210528541U (en) | On-table instant filtering water purification system | |
| CN209254242U (en) | A kind of Multistage self-cleaning washes sewage-treatment plant | |
| CN103990313B (en) | Low permeability oil field recovered water filtration system and backwash process thereof | |
| CN215742902U (en) | Nanofiltration wastewater used for backwashing of ultrafiltration membrane | |
| CN106673137A (en) | Dual-membrane long-acting water making system | |
| CN210528597U (en) | Intelligent wastewater recycling water purifier | |
| CN209583711U (en) | Mutual backwashing ultrafiltration device | |
| CN103420450A (en) | Double membrane mutual flushing type double water outlet reverse osmosis water purifier | |
| CN203653349U (en) | Domestic RO (Reverse Osmosis) membrane backwashing water purification machine | |
| CN206666239U (en) | Water purifier system | |
| CN113351022A (en) | Process for backwashing nanofiltration wastewater based on water treatment on ultrafiltration membrane | |
| CN212467741U (en) | Backwashing system of roll type ultrafiltration membrane and water treatment system | |
| JP5249104B2 (en) | Membrane filtration system and cleaning method thereof | |
| CN210656213U (en) | Water purification system and water purification unit | |
| CN210163221U (en) | Ecological environment-friendly wastewater-free water purifier | |
| CN203333347U (en) | Continuous membrane filtration system | |
| CN107867766B (en) | Membrane method water treatment process test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |