CN214990437U - System for reducing ultrafiltration self-water-consumption rate and improving water yield recovery rate - Google Patents
System for reducing ultrafiltration self-water-consumption rate and improving water yield recovery rate Download PDFInfo
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- CN214990437U CN214990437U CN202120034245.1U CN202120034245U CN214990437U CN 214990437 U CN214990437 U CN 214990437U CN 202120034245 U CN202120034245 U CN 202120034245U CN 214990437 U CN214990437 U CN 214990437U
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Abstract
The utility model discloses a system for reducing the self-water-consumption rate of ultrafiltration and improving the recovery rate of produced water, which comprises an ultrafiltration system and a wastewater pool I, waste water sump two, one-level self-cleaning filter and second grade self-cleaning filter, the outlet connection of ultrafiltration system bottom has the ultrafiltration drain pipe, the ultrafiltration drain pipe divide into drainage branch road one and drainage branch road two, drainage branch road one communicates to waste water sump one, drainage branch road two communicates to waste water sump two, waste water sump one communicates to the water inlet of one-level self-cleaning filter through waste water pipeline, the outlet of straining water of one-level self-cleaning filter communicates the water inlet of second grade self-cleaning filter, the qualified water export of second grade self-cleaning filter advances water piping connection to ultrafiltration system's ultrafiltration water inlet through the ultrafiltration, unqualified water export communicates to waste water sump two through unqualified water pipe, the backwash water export of one-level self-cleaning filter and second grade self-cleaning filter communicates to waste water sump two through the backwash drain pipe. The utility model discloses simple structure, the simple operation, operation and maintenance cost are low.
Description
Technical Field
The utility model relates to a system for reduce ultrafiltration self-service water rate and improve product water recovery rate.
Background
Currently, ultrafiltration is the most common process in water treatment, the operation flow is generally forward washing-operation-backwashing-operation, and forward washing before operation aims at discharging water staying in ultrafiltration equipment for a long time, and the water quality of part of the water is good; backwashing is divided into common backwashing and reinforced backwashing, and the suspended solids of the waste water of the common backwashing are high; the reinforced backwashing wastewater has complex components and higher content of soluble solids. The water for forward washing, common backwashing and reinforced backwashing is ultrafiltration self-water, the common backwashing is carried out once after about 40 minutes, the reinforced backwashing is carried out once after about 40 common backwashing, ultrafiltration drainage is collected to a wastewater disposal basin through a trench, the ultrafiltration self-water rate is 10%, the discharge water amount is large, the recycling in a factory is difficult, the treatment is difficult because the reinforced backwashing wastewater contains sodium hypochlorite and other substances, and the ultrafiltration drainage is a difficult problem in the industry all the time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides a system which has reasonable structural design, reduces the self-water-consumption rate of ultrafiltration and improves the recovery rate of produced water, and realizes the classified collection of ultrafiltration reinforced backwashing wastewater, common backwashing wastewater and forward washing drainage through a newly added wastewater pond and a corresponding pipeline valve; common backwashing wastewater and normal washing drainage are treated by the two-stage self-cleaning filter and then returned to the front of the ultrafiltration system for ultrafiltration water inlet, thereby achieving the purpose of reducing the ultrafiltration self-water use rate.
The utility model provides a technical scheme that above-mentioned problem adopted is: a system for reducing the self-water utilization rate of ultrafiltration and improving the recovery rate of produced water is characterized by comprising an ultrafiltration system, a first wastewater pool, a second wastewater pool, a first self-cleaning filter and a second self-cleaning filter, wherein a water outlet at the bottom of the ultrafiltration system is connected with an ultrafiltration water drain pipe which is divided into a first water drain branch and a second water drain branch, the first water drain branch is communicated with the first wastewater pool, the second water drain branch is communicated with the second wastewater pool, the first water drain branch and the second water drain branch are respectively provided with a first valve and a second valve, the first wastewater pool is communicated with a water inlet of the first self-cleaning filter through a wastewater conveying pipeline, a filtered water outlet of the first self-cleaning filter is communicated with a water inlet of the second self-cleaning filter, a qualified water outlet of the second self-cleaning filter is connected with an ultrafiltration water inlet of the ultrafiltration system through an ultrafiltration water inlet pipe, and an unqualified water outlet of the second self-cleaning filter is communicated with the second wastewater pool through an unqualified water pipe, and backwashing water outlets of the first-stage self-cleaning filter and the second-stage self-cleaning filter are communicated to a wastewater pool II through a backwashing water discharge pipe.
Furthermore, a third valve is arranged on the unqualified water pipe.
Furthermore, a turbidity meter is arranged on the ultrafiltration water inlet pipe.
Furthermore, a water delivery pump is connected to the wastewater delivery pipeline.
The ultrafiltration drainage mainly comprises forward washing drainage, common backwashing wastewater and reinforced backwashing wastewater, the ultrafiltration backwashing is divided into the common backwashing and the reinforced backwashing, the common backwashing wastewater is mainly characterized by high suspended matter, and the common backwashing wastewater is recycled to an ultrafiltration system for water inlet after being qualified by treating the common backwashing wastewater through a two-stage self-cleaning filter; the reinforced backwashing wastewater has complex components and high salt content and is separately collected and recycled to other systems; the wastewater generated by the self-cleaning filter is recycled to other systems along with the reinforced backwashing wastewater.
The common backwashing takes impurities out of the surface of the membrane filaments through a large-flow backwashing membrane, so that the common backwashing wastewater is mainly characterized by high suspended matters, can be simply treated and then returns to the front of an ultrafiltration system to supplement ultrafiltration inflow water; the ultrafiltration reinforced backwashing is dosing backwashing, and the medicines are mainly acid, alkali, sodium hypochlorite and the like, so that the reinforced backwashing wastewater has complex components and higher salt content, and is recycled to other systems after being independently collected.
The common backwashing wastewater is recycled after being treated by the two-stage self-cleaning filter, so that the amount of wastewater discharged outside can be reduced, and the purpose of reducing the super-self-water consumption rate is achieved.
The reinforced backwashing wastewater and the backwashing water quantity of the self-cleaning filter are less, the water quality is poorer, and the reinforced backwashing wastewater and the self-cleaning filter can be used for systems for removing ash, wet slag and the like.
Carry out the ultrafiltration the utility model discloses after the transformation, the ultrafiltration can reduce to within 5% from the rate of water consumption.
The utility model discloses it is little to reform transform work load, does not have the influence to former ultrafiltration backwash system.
The process flow is as follows:
the drainage of the ultrafiltration system comprises forward washing drainage, common backwashing wastewater and reinforced backwashing wastewater, the drainage of the ultrafiltration system is discharged through a bottom ultrafiltration drainage pipe, the ultrafiltration drainage pipe is divided into a drainage branch I and a drainage branch II, the drainage branch I is communicated with a wastewater pool I, the drainage branch II is communicated with a wastewater pool II, the drainage branch I and the drainage branch II are respectively provided with a valve I and a valve II, the forward washing drainage and the common backwashing wastewater are discharged to the wastewater pool I through the drainage branch, and the reinforced backwashing wastewater is discharged to the wastewater pool II through the drainage branch II; the wastewater treatment device comprises a wastewater tank I, a wastewater delivery pipeline, a secondary self-cleaning filter, an ultrafiltration water inlet pipe, an ultrafiltration system, a wastewater inlet pipe, a wastewater outlet, a backwashing water outlet and a backwashing water outlet pipe.
Compared with the prior art, the utility model, have following advantage and effect:
1. by the classified collection of the ultrafiltration reinforced backwashing wastewater, the common backwashing wastewater and the forward washing drainage, the quality-divided recovery and the cascade utilization of the wastewater are realized.
2. After being treated by two-stage self-cleaning filters, the common backwashing wastewater and the forward washing drainage are returned to the inlet of the ultrafiltration system to be supplemented by ultrafiltration inlet water, so that the self-water-consumption rate of ultrafiltration can be reduced from 10% to within 5%.
3. Through the utility model discloses reform transform the back, ultrafiltration system's waste water discharge capacity greatly reduced makes the investment of handling ultrafiltration waste water reduce.
4. The utility model discloses the system is simple, the simple operation, and operation and maintenance cost are low.
Drawings
FIG. 1 is a schematic diagram of the structure of the original ultrafiltration backwashing wastewater discharge process.
Fig. 2 is a schematic diagram of the system structure of the present invention.
In the figure: the system comprises an ultrafiltration system 1, an ultrafiltration drain pipe 2, a first drainage branch 21, a second drainage branch 22, a drainage ditch 3, a first wastewater pool 4, a second wastewater pool 5, a wastewater conveying pipeline 6, a first-stage self-cleaning filter 7, a second-stage self-cleaning filter 8, an ultrafiltration water inlet pipe 9, a backwashing drain pipe 10, an unqualified water pipe 11, a first valve 12, a second valve 13, a water delivery pump 14, a third valve 15 and a turbidity meter 16.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 2, in the embodiment, a system for reducing ultrafiltration self-water utilization rate and improving recovery rate of produced water comprises an ultrafiltration system 1, a first wastewater pool 4, a second wastewater pool 5, a first self-cleaning filter 7 and a second self-cleaning filter 8, wherein an ultrafiltration drain pipe 2 is connected to a drain port at the bottom of the ultrafiltration system 1, the ultrafiltration drain pipe 2 is divided into a first drain branch 21 and a second drain branch 22, the first drain branch 21 is communicated with the first wastewater pool 4, the second drain branch 22 is communicated with the second wastewater pool 5, a first valve 12 and a second valve 13 are respectively installed on the first drain branch 21 and the second drain branch 22, the first wastewater pool 4 is communicated with a water inlet of the first self-cleaning filter 7 through a wastewater conveying pipeline 6, a filtered water outlet of the first self-cleaning filter 7 is communicated with a water inlet of the second self-cleaning filter 8, a qualified water outlet of the second self-cleaning filter 8 is connected to an ultrafiltration water inlet of the ultrafiltration system 1 through a water inlet pipe 9, an unqualified water outlet of the second-stage self-cleaning filter 8 is communicated to the second wastewater tank 5 through an unqualified water pipe 11, and backwashing water outlets of the first-stage self-cleaning filter 7 and the second-stage self-cleaning filter 8 are communicated to the second wastewater tank 5 through a backwashing water discharge pipe 10.
Specifically, the unqualified water pipe 11 is provided with a third valve 15. A turbidity meter 16 is arranged on the ultrafiltration water inlet pipe 9. The wastewater conveying pipeline 6 is connected with a water conveying pump 14.
The process flow is as follows: the drainage of the filtering system 1 comprises forward washing drainage, common backwashing wastewater and reinforced backwashing wastewater, the drainage of the ultrafiltration system 1 is discharged through a bottom ultrafiltration drainage pipe 2, the ultrafiltration drainage pipe 2 is divided into a drainage branch 21 and a drainage branch 22, the drainage branch 21 is communicated with a wastewater pool 4, the drainage branch 22 is communicated with a wastewater pool 5, a valve 12 and a valve 13 are respectively arranged on the drainage branch 21 and the drainage branch 22, the forward washing drainage and the common backwashing wastewater are discharged to the wastewater pool 4 through the drainage branch 21, and the reinforced backwashing wastewater is discharged to the wastewater pool 5 through the drainage branch 22; a wastewater disposal basin 4 communicates to the water inlet of one-level self-cleaning filter 7 through waste water pipeline 6, the water outlet of one-level self-cleaning filter 7 communicates the water inlet of second grade self-cleaning filter 8, wastewater is handled through one-level self-cleaning filter 7 and second grade self-cleaning filter 8 in the wastewater disposal basin 4, the qualified water of discharge gets into ultrafiltration system 1 through ultrafiltration inlet tube 9 and is intake as the ultrafiltration, unqualified water is discharged to wastewater disposal basin two 5 through unqualified water pipe 11, the backwash drainage of one-level self-cleaning filter 7 and second grade self-cleaning filter 8 is discharged to wastewater disposal basin two 5 through backwash drain pipe 10.
Specifically, during the ultrafiltration ordinary backwashing, the first valve 12 is opened, the second valve 13 is closed, and the ultrafiltration backwashing wastewater is discharged to the first original wastewater pool 4 along the original drainage ditch 3. And when the ultrafiltration reinforced backwashing is carried out, opening a second valve 13, closing a first valve 12, and discharging the ultrafiltration backwashing wastewater to a second newly-added wastewater pool 5 along a second newly-added pipeline drainage branch 22. And during ultrafiltration forward washing, opening the first valve 12, closing the second valve 13, and discharging ultrafiltration backwashing wastewater to the first original wastewater tank 4 along the original drainage ditch 3. When the liquid level in the first wastewater tank 4 is higher, the water delivery pump 14 is started, the self-cleaning filter system is started, and qualified produced water returns to the inlet of the ultrafiltration system 1. And when the liquid level in the second wastewater tank 5 is higher, starting the wastewater pump and recycling the wastewater pump to other systems.
Example 2.
Some thermal power plant in HebeiThe capacity of the unit is 2 units of 330MW, the unit is influenced by environmental protection policies, the wastewater in a factory is strictly discharged, a water balance test is carried out in 2018, and the ultrafiltration backwashing wastewater is about 22m3The/h, no department's consumption in the factory, in the end of 2018 years, adopt the utility model discloses reform transform ultrafiltration backwash system, carry out backwash waste water and divide matter to retrieve, reduce ultrafiltration waste water to 4m3And h, when the zero discharge of the waste water is improved, the investment is saved by about 500 ten thousand yuan.
Example 3.
In Ningxia certain thermal power plant, the unit capacity is 2 660MW, which is influenced by environmental protection policy, and the ultrafiltration backwashing wastewater is about 34 m3And/h, no consumption, and the zero-discharge system is planned to be constructed in 2018 to treat the whole-plant wastewater, so that the in-plant wastewater is optimized and reformed. At the end of 2019 years, the utility model discloses reform transform the back, ultrafiltration backwash waste water reduces to 6m3And h, recycling the waste water to a wet slag removal system and a dust removal system.
Those not described in detail in this specification are well within the skill of the art.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All equivalent changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The system for reducing the ultrafiltration self-water utilization rate and improving the water yield is characterized by comprising an ultrafiltration system (1), a first wastewater pool (4), a second wastewater pool (5), a first self-cleaning filter (7) and a second self-cleaning filter (8), wherein an ultrafiltration drain pipe (2) is connected to a water outlet at the bottom of the ultrafiltration system (1), the ultrafiltration drain pipe (2) is divided into a first drainage branch (21) and a second drainage branch (22), the first drainage branch (21) is communicated to the first wastewater pool (4), the second drainage branch (22) is communicated to the second wastewater pool (5), a first valve (12) and a second valve (13) are respectively installed on the first drainage branch (21) and the second drainage branch (22), the first wastewater pool (4) is communicated to a water inlet of the first self-cleaning filter (7) through a wastewater conveying pipeline (6), and a filtered water outlet of the first self-cleaning filter (7) is communicated with a water inlet of the second self-cleaning filter (8) Qualified water outlets of the second-stage self-cleaning filter (8) are connected to an ultrafiltration water inlet of the ultrafiltration system (1) through an ultrafiltration water inlet pipe (9), unqualified water outlets of the second-stage self-cleaning filter (8) are communicated to a second wastewater tank (5) through an unqualified water pipe (11), and backwashing water outlets of the first-stage self-cleaning filter (7) and the second-stage self-cleaning filter (8) are communicated to the second wastewater tank (5) through a backwashing water discharge pipe (10).
2. The system for reducing the self-water rate of ultrafiltration and improving the recovery rate of produced water according to claim 1, wherein a valve III (15) is installed on the unqualified water pipe (11).
3. The system for reducing the self-water rate of ultrafiltration and improving the recovery rate of produced water according to claim 1, wherein the ultrafiltration water inlet pipe (9) is provided with a turbidity meter (16).
4. The system for reducing the self-water rate of ultrafiltration and improving the recovery rate of produced water according to claim 1, wherein a water transfer pump (14) is connected to the wastewater delivery pipeline (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120034245.1U CN214990437U (en) | 2021-01-07 | 2021-01-07 | System for reducing ultrafiltration self-water-consumption rate and improving water yield recovery rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120034245.1U CN214990437U (en) | 2021-01-07 | 2021-01-07 | System for reducing ultrafiltration self-water-consumption rate and improving water yield recovery rate |
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| Publication Number | Publication Date |
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| CN214990437U true CN214990437U (en) | 2021-12-03 |
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| CN202120034245.1U Active CN214990437U (en) | 2021-01-07 | 2021-01-07 | System for reducing ultrafiltration self-water-consumption rate and improving water yield recovery rate |
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