CN205740556U - A kind of brackish water desalination system utilizing dense water to carry out backwash - Google Patents
A kind of brackish water desalination system utilizing dense water to carry out backwash Download PDFInfo
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- CN205740556U CN205740556U CN201620088983.3U CN201620088983U CN205740556U CN 205740556 U CN205740556 U CN 205740556U CN 201620088983 U CN201620088983 U CN 201620088983U CN 205740556 U CN205740556 U CN 205740556U
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- water
- backwash
- medium filter
- entrance
- reverse osmosis
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 28
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 38
- 239000012528 membrane Substances 0.000 claims abstract description 35
- 238000009991 scouring Methods 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 230000001112 coagulating effect Effects 0.000 claims description 10
- 238000001556 precipitation Methods 0.000 claims description 10
- 238000005276 aerator Methods 0.000 claims description 8
- 239000006004 Quartz sand Substances 0.000 claims description 7
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 7
- 239000003830 anthracite Substances 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000013505 freshwater Substances 0.000 abstract description 6
- 239000000706 filtrate Substances 0.000 description 14
- 238000001914 filtration Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 229910017053 inorganic salt Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000036284 oxygen consumption Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000004531 microgranule Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a kind of brackish water desalination system utilizing dense water to carry out backwash, it is characterised in that this system includes more medium filter, reverse osmosis membrane filt and backwash water pump；Described more medium filter is provided with more medium filter entrance, more medium filter outlet and scouring media entrance, and described reverse osmosis membrane filt is provided with reverse osmosis membrane filt entrance, pure water inlet and dense water out；The outlet of described more medium filter connects with described reverse osmosis membrane filt entrance, and the dense water out of described reverse osmosis membrane filt is connected with the scouring media entrance of described more medium filter by backwash water pump.Use system of the present utility model to carry out brackish water desalination, can not only effectively utilize dense water, and backwash fresh water can also be saved.
Description
Technical field
This utility model relates to a kind of brackish water desalination system utilizing dense water to carry out backwash.
Background technology
In the brackish water desalination technological process of Xinjiang, by bitter through potassium permanganate composites and multi-medium filtering
Entering one-level two-stage nitration bitter reverse osmosis membrane after the device pretreatment such as device, system is produced Water Sproading rate and is about
75%, the dense water of generation is about 25%.More medium filter includes one or more layers filter medium or title
For filtrate, its principle be under pressure water higher for turbidity by certain thickness by granular or
Non-grain filtrate, thus effectively remove suspended impurity and make clarification of water, delivery turbidity is up to less than 3 degree.Many
Medium filter is the important preprocessing device of brackish water desalination technique counter-infiltration system, it is possible to effectively go
Except the colloid of counter-infiltration system sensitivity, float etc. in bitter, meet reverse osmosis membrane to pollution index
The requirement of SDI.
But, after more medium filter runs a period of time, filtrate is by the float in bitter, glue
Bodies etc. block, and affect filter effect, it is necessary to carry out backwash.In general, light as backwashing water
The water yield accounts for the 3%-5% of the bitter total amount that need to desalinate, in order to save the freshwater resources of Xinjiang region, and research
It is a kind of that can to substitute fresh water the most particularly important as the method for backwashing water.
Utility model content
The purpose of this utility model is to provide a kind of brackish water desalination system utilizing dense water to carry out backwash,
Use system of the present utility model to carry out brackish water desalination, can not only effectively utilize dense water, and can also
Save backwash fresh water.
To achieve these goals, this utility model provides a kind of bitter utilizing dense water to carry out backwash
Desalination system, wherein, this system includes more medium filter, reverse osmosis membrane filt and backwash water pump；
Described more medium filter is provided with more medium filter entrance, more medium filter outlet and scouring media
Entrance, described reverse osmosis membrane filt is provided with reverse osmosis membrane filt entrance, pure water inlet and dense water and goes out
Mouthful；The outlet of described more medium filter connects with described reverse osmosis membrane filt entrance, described reverse osmosis membrane
The dense water out of filter is connected with the scouring media entrance of described more medium filter by backwash water pump.
Preferably, described system also includes coagulative precipitation tank, and the outlet of described coagulative precipitation tank is with described
More medium filter entrance connects.
Preferably, described system also includes dense pond, the dense water out of described reverse osmosis membrane filt and institute
Stating the water inlet connection in dense pond, the outlet in described dense pond is by described backwash water pump and described many Jie
The scouring media entrance connection of mass filter.
Preferably, described brackish water desalination system also includes backwash air pump and aerator；Described aerator sets
Being equipped with air inlet and gas outlet, described backwash air pump is provided with air pump entrance and exports with air pump；Described air blast
The gas outlet of machine connects with the air pump entrance of described backwash air pump, the air pump outlet of described backwash air pump and institute
State the scouring media entrance connection of more medium filter.
Preferably, described brackish water desalination system also includes storing the bitter pond of bitter and storing water purification
Water purifying tank, the described outlet in bitter pond connects with the water inlet of coagulative precipitation tank, described water purifying tank
Water inlet connect with the pure water inlet of described reverse osmosis membrane filt.
Preferably, described more medium filter inwall is lined with rubber layer.
Preferably, being provided with filter material layer in described more medium filter, described filter material layer is selected from quartz sand
At least one of which in layer, anthracite coal measure and manganese layer of sand.
Compared with prior art, brackish water desalination system of the present utility model not only runs safety, backwash
Speed and efficiency high, for backwash dense water will not fouling on reverse osmosis membrane, but also can have
Effect utilizes dense water, saves backwash fresh water.
Other feature and advantage of the present utility model will give in detailed description of the invention part subsequently in detail
Explanation.
Accompanying drawing explanation
Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes one of description
Point, it is used for explaining this utility model together with detailed description below, but is not intended that this practicality
Novel restriction.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of this utility model a kind of detailed description of the invention of brackish water desalination system.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.It is to be understood that
It is that detailed description of the invention described herein is merely to illustrate and explains this utility model, is not used to limit
This utility model processed.
As it is shown in figure 1, this utility model provides a kind of brackish water desalination system utilizing dense water to carry out backwash
System, wherein, this system includes more medium filter, reverse osmosis membrane filt and backwash water pump；Described many
Medium filter is provided with more medium filter entrance, more medium filter outlet and scouring media entrance,
Described reverse osmosis membrane filt is provided with reverse osmosis membrane filt entrance, pure water inlet and dense water out；Institute
State more medium filter outlet to connect with described reverse osmosis membrane filt entrance, described reverse osmosis membrane filt
Dense water out connected with the scouring media entrance of described more medium filter by backwash water pump；Described system
System can also include coagulative precipitation tank, and the outlet of described coagulative precipitation tank can be with described multi-medium filtering
Device entrance connects；Described system can also include dense pond, the dense water out of described reverse osmosis membrane filt
Can connect with the water inlet in described dense pond, the outlet in described dense pond can be by described backwash water
Pump connects with the scouring media entrance of described more medium filter；Described brackish water desalination system can also be wrapped
Including the bitter pond storing bitter and the water purifying tank storing water purification, the outlet in described bitter pond is permissible
Connecting with the water inlet of coagulative precipitation tank, the water inlet of described water purifying tank can be with described reverse osmosis membrane filtration
The pure water inlet connection of device.
Coagulative precipitation tank in this utility model is referred to as potassium permanganate composites or high density softens clear
Clear pond, refers to use coagulant, flocculant, flocculation aid or antibacterial etc. by the SOLID ORGANIC in bitter
Thing and solid inorganic thing precipitate, and reduce the pressure of reverse osmosis membrane filt；Reverse osmosis membrane filt profit
With reverse osmosis membrane under the effect of the pressure higher than solution osmotic pressure, reverse osmosis can not be passed through according to other materials
The principle of permeable membrane and these materials and water are separated, be mainly used in removing the most of salt in bitter
Point.
The defecator of a kind of pressure type of more medium filter, its principle is when bitter passes through
During filtrate, in water, float is retained down by filtering layer surface with machinery choked flow effect owing to adsorbing.Work as current
When entering in the middle of filtering layer, due to the filtrate in filtering layer arrange the tightst so that in water, microgranule has more
Chance is collided with filtrate, so that flocculation material, float and filter material surface adhere to each other in water, miscellaneous in water
Matter is trapped in filter material layer, obtains the water quality of clarification.In brackish water desalination technique, according to bitter water quality
Feature, the filter material layer in described more medium filter can be selected from quartz sand layer, anthracite coal measure and manganese
At least one of which in layer of sand, thus increase single device treating capacity, preferably remove the suspension in bitter
Thing, colloid and fine particle etc..
A kind of embodiment, the material of more medium filter can be the carbon of one layer of priming paint two-layer finish paint of outer painting
Steel, inwall can be lined with caoutchouc layer, such that it is able to isolation water and the contact of carbon steel inwall, it is ensured that many
Medium filter is not corroded by water, safe operation more than 10 years.
A kind of detailed description of the invention, multimedium multi-filter of the present utility model uses particle diameter to be φ 0.5～φ
The quartz sand of 1.0 millimeters and particle diameter be the anthracite of φ 0.8～φ 1.2 millimeter as filtrate, and select relatively low
Operation flow velocity, to adapt to worse water quality, the flow of single filter can reach 73 meters3/ hour
Left and right.
The purpose of backwash design is to remove the filtration of particulate matters body of close attachment on deep layer filter bed, for completing
The step for, the flushing speed of backwash is typically faster than normal filtration speed.Backwash is the most permissible
Including isolation filter tank, air backwash, air and the step such as water mixing backwash and final rinsing.The first two
Step is to expand and stir filter bed, removes the solids of bulk accumulation, and latter two steps is to go
Particulate matter tiny on desanding bed.Therefore as it is shown in figure 1, described brackish water desalination system can also include
Backwash air pump and aerator；Described aerator can be provided with air inlet and gas outlet, described backwash air pump
Air pump entrance can be provided with export with air pump；The gas outlet of described aerator can be with described backwash air pump
Air pump entrance connection, described backwash air pump air pump outlet can be with the flushing of described more medium filter
Medium inlet connects.The effect of backwash water pump and backwash air pump is the backwash offer for more medium filter
The sufficient water yield and tolerance, to realize the step of backwash.
Concrete operation method and the condition of this utility model system are provided below, thus illustrate that this practicality is new
The advantage of the brackish water desalination system of type, and it is new to be conducive to skilled artisan understands that and implement this practicality
Type.
During with anthracite for filtrate, it it is 436 meters to enter the bitter flow of more medium filter3/ hour
As a example by, backwash intensity can reach 10 liters/meter2About Miao, during with quartz sand for filtrate, backwash is strong
Degree can reach 15 liters/meter2About Miao, during with multimedium for filtrate, backwash intensity can be 12 liters
/ rice2About Miao, the filter area using backwash intensity to be multiplied by filter can be obtained by backwash flow.
Backwash water head is generally higher than 15 meters of water, if considering the factors such as pipe damping damage, can select 25 meters
Lift, single backwash water pump discharge can be 290 meters3/ hour about, each backwash time can be
About 30 minutes, the backwash cycle can be about 8 hours, and single more medium filter water requirement is about
435 meters3/ sky.
Owing to the backwash water yield is very big, device of the present utility model uses reverse osmosis concentrated water as backwash
Water.According to bitter water quality, for preventing the inorganic salt in bitter on reverse osmosis membrane, pipeline and equipment
Fouling, antisludging agent to be added before entering reverse osmosis membrane.Therefore, the dense water through reverse osmosis membrane contains
Have certain density antisludging agent, inorganic salt will not fouling on backwash pump and pipeline, therefore relative to
The water that general salinity is higher, dense water is more suitable for backwash.
Because dense water is the water that bitter produces through desalinating process, wherein the total amount of inorganic salt material is the biggest
Change, simply concentration increase, as long as consider turbidity whether meet technological requirement.More medium filter pair
The requirement of backwash water quality is that turbidity is less than 3NTU, and dense water is because have passed through multiple times of filtration and reverse osmosis
Thoroughly, its turbidity is generally about 0NTU through test in laboratory, it is possible to meet the requirement of backwashing water.
Bitter, through desalination system, produces Water Sproading rate and calculates with 75%, be i.e. equivalent to bitter, dense water
In each ion be all concentrated about 4 times.In the bitter of salt-soda soil, total salt quantity is generally 9800 mg/litre
Left and right, calcium ion concentration is generally about 425 mg/litre, sulfate concentration be generally 1573 milligrams/
About Shenging, bicarbonate radical is generally about 189 mg/litre and total hardness is generally about 2219 mg/litre,
And total salt quantity is generally about 40000 mg/litre in dense water, calcium ion concentration be generally 1300 milligrams/
About Shenging, sulfate concentration is generally about 6000 mg/litre, bicarbonate radical be generally 445 milligrams/
It is generally about 9000 mg/litre with total hardness about Shenging.
More medium filter is according to quartz sand and anthracite as filtrate, and filtrate is molten in alkalescence water sample
The increments solving solid content is maximum, if but less than 20 mg/litre, and oxygen consumption is less than 10 milligrams
/ liter, the increments of silicon dioxide is less than 10 mg/litre, it is possible to think that filtrate is stable in water sample
's.Take quartz sand and each 2000 grams of anthracite, be separately immersed in the dense water of 50 liters, soak 10 days,
Measure total salt quantity therein, calcium ion, sulfate radical, bicarbonate radical and total hardness, it was found that this five
Individual parameter does not changes, and the increments of dissolved solid is less than 20 mg/litre, oxygen consumption
Less than 10 mg/litre, the increments of silicon dioxide is less than 10 mg/litre.Therefore, dense water is as recoil
Wash water is feasible in terms of filtrate chemical stability, knowable to calculating above, and separate unit multi-medium filtering
Device backwash consumes the dense water yield and is about 435 meters3/ sky, is greatly saved freshwater resources.
Claims (6)
1. the brackish water desalination system utilizing dense water to carry out backwash, it is characterised in that this system includes more medium filter, reverse osmosis membrane filt and backwash water pump；
Described more medium filter is provided with more medium filter entrance, more medium filter outlet and scouring media entrance, and described reverse osmosis membrane filt is provided with reverse osmosis membrane filt entrance, pure water inlet and dense water out；
The outlet of described more medium filter connects with described reverse osmosis membrane filt entrance, and the dense water out of described reverse osmosis membrane filt is connected with the scouring media entrance of described more medium filter by backwash water pump；Described system also includes that coagulative precipitation tank, the outlet of described coagulative precipitation tank connect with described more medium filter entrance.
Brackish water desalination system the most according to claim 1, it is characterized in that, described system also includes dense pond, the dense water out of described reverse osmosis membrane filt connects with the water inlet in described dense pond, and the outlet in described dense pond is connected with the scouring media entrance of described more medium filter by described backwash water pump.
Brackish water desalination system the most according to claim 1, it is characterised in that described brackish water desalination system also includes backwash air pump and aerator；
Described aerator is provided with air inlet and gas outlet, and described backwash air pump is provided with air pump entrance and exports with air pump；
The gas outlet of described aerator connects with the air pump entrance of described backwash air pump, and the air pump outlet of described backwash air pump connects with the scouring media entrance of described more medium filter.
Brackish water desalination system the most according to claim 1, it is characterized in that, described brackish water desalination system also includes storing the bitter pond of bitter and storing the water purifying tank of water purification, the described outlet in bitter pond connects with the water inlet of coagulative precipitation tank, and the water inlet of described water purifying tank connects with the pure water inlet of described reverse osmosis membrane filt.
Brackish water desalination system the most according to claim 1, it is characterised in that described more medium filter inwall is lined with rubber layer.
Brackish water desalination system the most according to claim 1, it is characterised in that be provided with filter material layer in described more medium filter, described filter material layer is at least one of which in quartz sand layer, anthracite coal measure and manganese layer of sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620088983.3U CN205740556U (en) | 2016-01-28 | 2016-01-28 | A kind of brackish water desalination system utilizing dense water to carry out backwash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620088983.3U CN205740556U (en) | 2016-01-28 | 2016-01-28 | A kind of brackish water desalination system utilizing dense water to carry out backwash |
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| Publication Number | Publication Date |
|---|---|
| CN205740556U true CN205740556U (en) | 2016-11-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147575A (en) * | 2018-03-02 | 2018-06-12 | 天津丽彩数字技术有限公司 | A kind of desalination by reverse osmosis equipment |
| CN112429900A (en) * | 2020-11-18 | 2021-03-02 | 内蒙古晶泰环境科技有限责任公司 | Method for optimizing trend of membrane concentration ultrafiltration cross flow concentrated water |
-
2016
- 2016-01-28 CN CN201620088983.3U patent/CN205740556U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147575A (en) * | 2018-03-02 | 2018-06-12 | 天津丽彩数字技术有限公司 | A kind of desalination by reverse osmosis equipment |
| CN112429900A (en) * | 2020-11-18 | 2021-03-02 | 内蒙古晶泰环境科技有限责任公司 | Method for optimizing trend of membrane concentration ultrafiltration cross flow concentrated water |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |