CN112830605B - Super enrichment facility of high salt waste water - Google Patents
Super enrichment facility of high salt waste water Download PDFInfo
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- CN112830605B CN112830605B CN201911165938.8A CN201911165938A CN112830605B CN 112830605 B CN112830605 B CN 112830605B CN 201911165938 A CN201911165938 A CN 201911165938A CN 112830605 B CN112830605 B CN 112830605B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 33
- 150000003839 salts Chemical class 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 300
- 238000000909 electrodialysis Methods 0.000 claims abstract description 57
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 46
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 36
- 238000001728 nano-filtration Methods 0.000 claims abstract description 27
- 238000009826 distribution Methods 0.000 claims description 61
- 238000005192 partition Methods 0.000 claims description 28
- 238000005452 bending Methods 0.000 claims description 25
- 238000011001 backwashing Methods 0.000 claims description 19
- 239000013505 freshwater Substances 0.000 claims description 19
- 239000002455 scale inhibitor Substances 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 12
- 239000003814 drug Substances 0.000 claims description 11
- 238000005370 electroosmosis Methods 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 7
- 230000008929 regeneration Effects 0.000 claims description 6
- 238000011069 regeneration method Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 125000006850 spacer group Chemical group 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 6
- 239000003014 ion exchange membrane Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- 239000011780 sodium chloride Substances 0.000 description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 description 5
- 235000011152 sodium sulphate Nutrition 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 3
- 229910001425 magnesium ion Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000002306 biochemical method Methods 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 210000000805 cytoplasm Anatomy 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides a high-salt wastewater super-concentration device, which comprises a raw water pump, a buffer water tank, an air floatation device, a multi-medium filter, a water softening device, an ultrafiltration device, a reverse osmosis device, an electrodialysis device and a nanofiltration device which are sequentially connected. The invention has high integration degree and overcomes the defects of high energy consumption and low efficiency of the traditional high-salt wastewater treatment device.
Description
Field of the art
The invention relates to the field of wastewater treatment equipment, in particular to a high-salt wastewater super-concentration device.
(II) background art
The high-salt wastewater is wastewater with the total salt content of at least 1 percent, the high-salt wastewater can cause the separation of the protoplasm of biological cells due to high osmotic pressure, and the high-concentration inorganic salt has strong toxicity to the biological cells. If the high-salt wastewater is directly discharged into the environment without desalination treatment, the ecological environment can be seriously damaged.
At present, the most applied methods in the treatment of high-salt wastewater are a distillation method and a biochemical method, but the distillation method has high energy consumption and low efficiency, and the biochemical method also needs longer microorganism domestication time and is easily influenced by the fluctuation of inorganic salt concentration. Electrochemical processes are emerging as technology advances. The electrochemical treatment method mainly comprises the steps of concentrating high-salt wastewater through electrodialysis equipment, and then drying the concentrated water, so that the aim of delaying the high-salt wastewater is fulfilled. However, the electrodialysis device is very easy to block the ion exchange membrane when treating wastewater with higher hardness or higher organic matter content, and the problem of high concentrated water amount and high subsequent treatment cost exists when the electrodialysis device is simply used for treatment; the existing electrodialysis equipment has the problem of leakage after long-time operation, so that the electrodialysis efficiency is reduced, and the cost is increased.
(III) summary of the invention
The invention provides a high-salt wastewater super-concentration device for overcoming the defects in the prior art.
The invention is realized by the following technical scheme:
The utility model provides a high salt waste water super concentration device, includes raw water pump and automatic control ware, its characterized in that: the water outlet of the raw water pump is connected with the water inlet of the buffer tank through a pipeline, the water outlet of the buffer tank is connected with the water inlet pipeline of the first lifting pump, the water outlet of the first lifting pump is connected with the water inlet of the air floatation device, the water outlet of the air floatation device is connected with the multi-medium filter through the second lifting pump, the water outlet of the multi-medium filter is connected with the water inlet pipeline of the water softener, the water outlet of the water softener is connected with the water inlet pipeline of the ultrafiltration device, the concentrated water outlet of the ultrafiltration device is connected with the water inlet pipeline of the reverse osmosis device, and the clear water outlet of the ultrafiltration device is connected with the fresh water tank through a pipeline; the clean water outlet of the reverse osmosis device is connected with a fresh water tank pipeline, and the concentrated water outlet of the reverse osmosis device is connected with a water inlet pipeline of the electrodialysis device; the concentrated water outlet of the electrodialysis device is connected with the water inlet of the nanofiltration device, and the fresh water outlet of the electrodialysis device is connected with the water inlet of the reverse osmosis device through an electroosmosis return pipe; the sodium chloride concentrated water outlet of the nanofiltration device is connected with a sodium chloride concentrated water compartment pipeline of the concentrated water tank; the sodium sulfate concentrated water outlet of the nanofiltration device is connected with a concentrated water tank sodium sulfate concentrated water compartment pipeline; the automatic controller is electrically connected with the raw water pump, the first lifting pump, the air floatation device, the second lifting pump, the multi-medium worry device, the water softener, the ultrafiltration device, the reverse osmosis device, the electrodialysis device and the nanofiltration device respectively.
The system also comprises a TDS detector and a three-way valve, wherein the TDS detector is arranged on a pipeline between the water softening device and the ultrafiltration device; the three-way valve is arranged on a pipeline between the clear water outlet of the ultrafiltration device and the water inlet of the reverse osmosis device; the three-way valve is connected with a water inlet of electrodialysis equipment through a branch water pipe; the TDS detector and the three-way valve are respectively and electrically connected with the automatic controller.
The scale inhibitor tank is connected with a water inlet pipeline of the reverse osmosis equipment through the scale inhibitor pump.
The backwashing equipment is also included; the water outlet of the water intake pump is connected with the water inlet pipeline of the backwashing tank, the water outlet of the backwashing tank is connected with the water inlet of the backwashing pump, the water outlet of the backwashing pump is connected with the backwashing water inlet of the reverse osmosis device through a main backwashing water pipe, and the backwashing water inlet of the reverse osmosis device is provided with a first valve; the backwash water outlet of the reverse osmosis device is connected with the buffer tank through a main return pipeline; the main cleaning water pipe is connected with a backwash water inlet of the ultrafiltration device through a second valve, and a backwash water outlet of the ultrafiltration device is connected with the main backflow water pipe; the main cleaning water pipe is connected with a backwash water inlet of the reverse electrodialysis device through a third valve, and a backwash water outlet of the electrodialysis device is connected with the main backflow water pipe; the main cleaning water pipe is connected with a backwash water inlet of the nanofiltration equipment through a fourth valve, and a backwash water outlet of the nanofiltration equipment is connected with a main backflow water pipe; the main reflux water pipe is connected with the buffer tank, the main cleaning water pipe is connected with a regeneration water inlet of the water softener through a fifth valve, and a regeneration water outlet of the water softener is connected with the sewage pipe; the main cleaning water pipe is connected with a backwash water inlet of the multi-medium filter through a sixth valve, and a backwash water outlet of the multi-medium filter is connected with a sewage pipe; the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the water intake pump are respectively and electrically connected with the automatic controller.
The backwashing tank is connected with the medicament tank through a medicament pump, and the medicament pump is electrically connected with the automatic controller.
The electrodialysis apparatus comprises a separator; the partition plate comprises a first plate body, a first partition net chamber is arranged in the middle of the first plate body, a plurality of water distribution holes are formed in the upper end and the lower end of the first plate body, and a plurality of first water distribution channels are formed between the first water distribution holes and the first partition net chamber; the first water distribution channels at the upper end and the lower end of the first body are staggered; the first water distribution Kong Chengchang is circular, and the flat side of the first water distribution hole is parallel to the upper side of the first plate body; the section of the first water distribution channel is arc-shaped.
The first water distribution channel comprises a vertical part, a first bending part and a second bending part; the vertical part is vertical to the straight edge of the water distribution hole; the curvature radius of the first bending part is smaller than that of the second bending part, and the bending directions of the first bending part and the second bending part are opposite.
A screen is arranged in the first screen cavity, and the screen is connected with the inner wall of the first screen cavity through welding or hot pressing; the meshes of the separation net are regular hexagons.
The partition plate also comprises a second plate body, wherein a second partition net chamber matched with the first partition net chamber is arranged in the middle of the second plate body, and second water distribution holes matched with the first water distribution holes are formed in the two ends of the second plate body; the first plate body and the second plate body are connected through hot pressing or welding, and the second screen cavity and the first screen cavity form a screen cavity; the separation net is welded or hot-pressed with the side wall of the separation net chamber.
The invention has the following technical effects:
1. the integrated level is high, area is little, can realize the automation mechanized operation moreover.
2. The use of the air floatation device, the multi-medium filter, the water softener and the ultrafiltration device ensures that the COD of the high-salt wastewater is lower before concentration, the calcium and magnesium ions are removed, and the organic matters are effectively removed, so that the scaling and blocking of the subsequent reverse osmosis device and electrodialysis device are effectively avoided.
3. The reverse osmosis equipment and the electrodialysis equipment are connected, so that the electrodialysis efficiency is improved, the amount of concentrated water generated by the electrodialysis equipment is small, and the subsequent treatment cost is reduced.
4. The TDS detector, the three-way valve and the water pipe are arranged, so that the application range and flexibility of the invention can be improved, and the most paths are selected according to different TDS values in the wastewater.
5. The partition board with the optimal design reduces the integrated current in the electrodialysis process, avoids the problem of internal leakage caused by collapse of the ion exchange membrane, improves the electrodialysis efficiency and reduces the use cost.
6. The problem that the membrane stack is sunk in the use process of electrodialysis equipment is solved by matching the fixing holes with the screw rods.
(IV) description of the drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a first construction of the separator of the present invention.
FIG. 3 is a schematic view of a second construction of the separator of the present invention.
Fig. 4 is a schematic view of a first plate body structure of the separator of the present invention.
Fig. 5 is a first structural schematic diagram of a second plate body of the separator of the present invention.
Fig. 6 is a schematic view of a second plate body of the separator according to the present invention.
FIG. 7 is a schematic view of the structure of the water distribution channel of the partition plate of the present invention.
The device comprises a 1-raw water pump, a 2-buffer tank, a 3-first lifting pump, a 4-air floatation device, a 5-second lifting pump, a 6-multi-medium filter, a 11-water softener, a 12-ultrafiltration device, a 13-scale inhibitor tank, a 14-reverse osmosis device, a 15-electrodialysis device, a 16-nanofiltration device, a 17-concentrate tank, a 18-fresh water tank, a 19-medicament tank, a 20-medicament pump, a 21-backwash tank, a 22-backwash pump, a 23-TDS detector, a 24-scale inhibitor pump, a 25-three-way valve, a 26-branch water pipe, a 27-main backwash water pipe, a 28-main backwash water pipe, a 29-first valve, a 30-second valve, a 31-third valve, a 32-fourth valve, a 33-fifth valve, a 34-sixth valve, a 35-electroosmosis reflux pipe, a 36-backwash water pipe, a 100-partition, a 101-first plate body, a 102-first water distribution hole, a 103-first water distribution channel, a 103-1-vertical part, a 103-2-first bending part, a 103-3-second bending part, a second water distribution hole, a 105-third water distribution hole, a second plate body, a second water distribution hole, a 13-third water distribution hole, a 2-stationary hole and a 112-third water distribution hole, a 2-membrane.
(Fifth) detailed description of the invention
The following is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention.
The "first", "second", etc. in this embodiment are used only for distinguishing descriptions, and are not to be construed as indicating or implying relative importance. The fixed connection mode includes but is not limited to welding, screwing, pipe clamping or water pipe joint and other connection modes known in the prior art.
Fig. 1 is a schematic diagram of an embodiment of the present invention. This embodiment provides a high salt wastewater super concentration device. The device comprises a raw water pump 1 and an automatic controller. The water inlet of the raw water pump 1 is connected with a high-salt wastewater storage tank, the water outlet of the raw water pump 1 is connected with the water inlet of the buffer tank 2 through a pipeline, the water outlet of the buffer tank 2 is connected with the water inlet pipeline of the first lifting pump 3, the water outlet of the first lifting pump 3 is connected with the water inlet of the air floatation device 4, the water outlet of the air floatation device 4 is connected with the multi-medium filter 6 through the second lifting pump 5, and the water outlet of the multi-medium filter 6 is connected with the water inlet pipeline of the water softener 11. The water outlet of the water softener 11 is connected with the water inlet pipeline of the ultrafiltration device 12, the concentrated water outlet of the ultrafiltration device 12 is connected with the water inlet pipeline of the reverse osmosis device 14, and the clear water outlet of the ultrafiltration device 12 is connected with the fresh water tank 18 through a pipeline. The clear water outlet of the reverse osmosis device 14 is connected with a fresh water tank 18 through a pipeline, the concentrated water outlet of the reverse osmosis device 14 is connected with the water inlet pipeline of the electrodialysis device 15, the concentrated water outlet of the electrodialysis device 15 is connected with the water inlet of the nanofiltration device 16, and the fresh water outlet of the electrodialysis device 15 returns to the water inlet of the reverse osmosis device 14 through an electroosmosis return pipe 35. The water outlet of the nanofiltration device 16 is connected with a concentrated water tank 17 through a pipeline, and the nanofiltration device 16 can separate sodium chloride and sodium sulfate in electrodialysis concentrated water. The sodium chloride concentrated water outlet of the nanofiltration device 16 is connected with a sodium chloride concentrated water compartment pipeline of the concentrated water tank 17; the sodium sulfate concentrate outlet of the nanofiltration device 16 is connected with a sodium sulfate concentrate compartment pipe of the concentrate tank 17.
The automatic controller is electrically connected with the raw water pump 1, the first lifting pump 3, the air floatation device 4, the second lifting pump 5, the multi-medium filter 6, the water softener 11, the ultrafiltration device 12, the reverse osmosis device 14, the electrodialysis device 15 and the nanofiltration device 16 respectively.
In order to prevent the water softener 11 from being unable to completely remove calcium and magnesium ions in the high salt wastewater and causing scaling of the reverse osmosis unit 14 and the electrodialysis unit 15, the present invention further comprises a scale inhibitor tank 13, and the scale inhibitor tank 13 is connected with a water inlet pipe of the reverse osmosis unit 14 through a scale inhibitor pump 24.
A TDS detector 23 is provided in the line between the water softener 11 and the ultrafiltration device 12, and a three-way valve 25 is provided in the line between the concentrate outlet of the ultrafiltration device 12 and the water inlet of the reverse osmosis device 14, which three-way valve 25 is connected to the water inlet of the electrodialysis device 15 via a bypass water line 26. The TDS detector 23 and the three-way valve 25 are electrically connected to an automation controller, respectively.
The invention also includes backwash equipment. The backwash equipment comprises a water intake pump connected with a fresh water tank 18 through a pipeline, a water outlet of the water intake pump is connected with a water inlet pipeline of a backwash tank 21, and the backwash tank 21 is also connected with a medicament tank 19 through a medicament pump 20. The water outlet of the backwash tank 21 is connected with the water inlet of the backwash pump 22, the water outlet of the backwash pump 22 is connected with the backwash water inlet of the reverse osmosis device 14 through a main backwash water pipe 27, the backwash water outlet of the reverse osmosis device 14 is connected with the buffer tank 2 through a main backwash water pipe 28, and a first valve 29 is arranged at the backwash water inlet of the reverse osmosis device 14.
The main backwash water pipe 27 is connected with a backwash water inlet of the ultrafiltration apparatus 12 through a second valve 30, and a backwash water outlet of the ultrafiltration apparatus 12 is connected with a main backwash water pipe 28.
The main backwash water pipe 27 is connected with a backwash water inlet of the electrodialysis device 15 through a third valve 31, and a backwash water outlet of the electrodialysis device 15 is connected with a main backwash water pipe 28.
The main backwash water pipe 27 is connected with a backwash water inlet of the nanofiltration equipment 16 through a fourth valve 32, and a backwash water outlet of the nanofiltration equipment 16 is connected with a main backwash water pipe 28.
The main backwash water pipe 27 is connected to the regeneration water inlet of the water softener 11 through a fifth valve 33 and the regeneration water outlet of the water softener 11 is connected to the sewage pipe.
The main backwash water pipe 27 is connected with a backwash water inlet of the multi-medium filter 6 through a sixth valve 34, and a backwash water outlet of the multi-medium filter 6 is connected with a sewage pipe.
The first valve 29, the second valve 30, the third valve 31, the fourth valve 32, the fifth valve 33, the sixth valve 34, and the drug pump 20 are electrically connected to an automation controller, respectively.
When wastewater treatment is carried out, a raw water pump 1 is started to send pretreated high-salt wastewater into a buffer tank 2, the wastewater in the buffer tank 2 is sent into an air floatation device 4 by a first lifting pump 3 for air separation, oil stains and suspended matters in the high-salt wastewater are removed, then the high-salt wastewater is sent into a multi-medium filter 6 by a second lifting pump 5 for further purification treatment, then calcium and magnesium ions in the wastewater are removed by a water softener 11 to complete softening of the high-salt wastewater, and then the high-salt wastewater enters an ultrafiltration device 12 for filtration concentration. The ultrafiltration concentrate produced by the ultrafiltration apparatus 12 flows through the TDS detector 23 via a conduit. When the TDS value detected by the TDS detector 23 is less than or equal to 30g/L, the ultrafiltration concentrated water enters the reverse osmosis equipment 14 through the three-way valve 25 for concentration, the scale inhibitor is added through the scale inhibitor pump 24 when the ultrafiltration concentrated water enters the reverse osmosis equipment 14, the reverse osmosis fresh water of the reverse osmosis equipment 14 is discharged into the fresh water tank 18, the reverse osmosis concentrated water enters the electrodialysis equipment 15 for concentration and separation, the fresh water generated by electrodialysis returns to the reverse osmosis equipment 14 for concentration again, and the electroosmosis concentrated water generated by electrodialysis enters the nanofiltration equipment 16 for nanofiltration and salt separation.
When the TDS value detected by the TDS detector 23 is more than or equal to 30g/L, the automatic controller adjusts the three-way valve 25, ultrafiltration concentrated water enters the electrodialysis device 15 through the three-way valve 25 and the branch water pipe 26 for concentration and separation, electroosmosis fresh water generated by electrodialysis returns to the reverse osmosis device 14 for concentration and then returns to the electrodialysis device 15 again, and electroosmosis concentrated water generated by electrodialysis enters the nanofiltration device 16 for nanofiltration and salt separation. The scale inhibitor is added by a scale inhibitor pump 24 as the electroosmotic fresh water returns to the reverse osmosis unit 14.
Before cleaning, the fresh water in the fresh water tank 18 is pumped into the backwash tank 21 by the water intake pump, and then cleaning agent is added into the backwash tank 21 by the agent pump 20.
When the reverse osmosis plant 14 is cleaned, the backwash pump 22 is started, the first valve 29 is opened and the second valve 30 to the sixth valve 34 are closed.
When the ultrafiltration apparatus 12 is cleaned, the backwash pump 22 is started, the second valve 30 is opened, and the first valve 29 and the third valve 31 to the sixth valve 34 are closed.
The cleaning of the multi-media filter 6, the water softener 11, the electrodialysis device 15 and the nanofiltration device 16 is performed by referring to the modes of the reverse osmosis device 14 and the ultrafiltration device 12.
The cleaning wastewater of the ultrafiltration device 12, the reverse osmosis device 14, the electrodialysis device 15 and the nanofiltration device 16 is discharged into the buffer tank 2 through the main return water pipe 28, and the reverse cleaning wastewater of the multi-medium filter 6 and the water softener 11 is discharged into the sewage pipe.
In order to overcome the defects that the conventional electrodialysis device 15 has large parasitic current and is easy to leak after long-time use, so that the concentration efficiency is obviously reduced and the cost is increased, the electrodialysis device 15 is improved, and particularly the membrane centering separator 100 of the electrodialysis device 15 is improved.
Fig. 2 to 7 show an embodiment of a separator 100 for an electrodialysis device 15 according to the invention.
As shown in fig. 2, the partition plate 100 includes a first plate body 101 made of an elastic material, a first partition chamber is disposed in the middle of the first plate body 101, a plurality of first water distribution holes 102 are disposed at the upper and lower ends of the first plate body 101, and a plurality of first water distribution channels 103 are disposed between the first water distribution holes 102 and the first partition chamber. The first water distribution holes 102 provided with the first water distribution channels 103 are staggered with the first water distribution holes 102 without the first water distribution channels 103. The first water distribution channels 103 at the upper end and the lower end of the first plate body 101 are distributed in a staggered manner. A screen 104 is provided in the first screen chamber, and the screen 104 is connected to the inner wall of the first screen chamber by welding or hot pressing. First fixing holes 105 are provided at four corners of the first plate body 101.
The first water distribution holes 102 are oblong, the flat sides of the first water distribution holes 102 are parallel to the upper side of the first plate body 101, and compared with the traditional square or circular first water distribution holes 102, the oblong first water distribution holes 102 can improve the water distribution rate in the electrodialysis process, improve the electrodialysis efficiency, and are more beneficial to the design and distribution of the first water distribution channels 103.
The first water distribution channel 103 is a groove etched on the first plate body 101, and the cross section of the first water distribution channel is semicircular and comprises a vertical portion 103-1, a first bending portion 103-2 and a second bending portion 103-3, wherein the vertical portion 103-1 is perpendicular to the straight side of the first water distribution hole 102. The radius of curvature of the first bending portion 103-2 is smaller than that of the second bending portion 103-3, and the center of the first bending portion 103-2 and the center of the second bending portion 103-3 are located at 180 degrees, that is, the bending directions of the first bending portion 103-2 and the second bending portion 103-3 are opposite. Of course, the cross section of the first water distribution channel 103 may also be in the shape of a circular arc with other central angles. The first water distribution channel 103 with the arc shape can enable water flow to flow more smoothly, the length of the first water distribution channel 103 is increased by the two bent parts with opposite directions, parasitic current is effectively reduced, and turbulence is generated.
The spacer 104 is made of high polymer elastic plates, such as PP plates, through laser cutting or engraving, the meshes are regular hexagons, and the spacer 104 is formed by rectangular arrays of meshes. The spacer 104 has better water permeability than square woven spacer 104 and can well support a homogeneous ion exchange membrane. Of course, the spacer 104 may also be produced by braiding.
To prevent the ion exchange membrane at the first water distribution channel 103 from collapsing after a lapse of time, causing the problem of inner leakage, as shown in fig. 3, the separator 100 further includes a second plate body 110 made of an elastic material. The second plate 110 has a second partition chamber in the middle and a second water distribution hole 111 at two ends, wherein the second partition chamber is matched with the first partition chamber; second fixing holes 112 matched with the first fixing holes 105 are formed at four corners of the second plate body 110. When in use, the first plate body 101 and the second plate body 110 are hot pressed or welded into an integral partition plate 100, the second partition chamber and the first partition chamber form a partition chamber, and the first fixing hole 105 and the second fixing hole form an integral fixing hole; the spacer 104 is welded or hot-pressed to the sidewall of the spacer chamber. At this time, the first water distribution channel 103 is hidden within the separator 100, and the ion exchange membrane is supported by the second plate body 110 not to be in contact with the first water distribution channel 103 any more, and the problem of inner leakage due to collapse of the ion exchange membrane does not occur.
As a further improvement on the partition plate 100, a second water distribution channel 114 matched with the first water distribution channel 103 is arranged on one surface of the second plate body 110, which is joined with the first plate body 101, that is, the first plate body 101 and the second plate body 110 are in mirror image relationship, after the first plate body 101 is joined with the second plate body 110, the first water distribution channel 103 and the second water distribution channel 114 form a water distribution channel with a circular or oval cross section, so that the water distribution effect of the partition plate 100 is better.
As a further improvement of the separator 100, an annular protrusion 115 is provided on the side of the second plate 110 away from the first plate 101, and since the second plate 110 is made of an elastic material, when the membrane stack is pressed, the adjacent protrusion 115 deforms to seal due to the pressing, so that the electrodialysis device 15 will not leak out during use.
Of course, the projections 115 can also be formed on the partition 100 with only the first plate body 101.
Four screws with the same cross section as the first fixing hole 105 are arranged on the pressing plates at the two ends of the membrane stack of the electrodialysis device 15, and the screws penetrate through the pressing plates from the first fixing hole 105 or the fixing holes and are fastened and connected through nuts. The fixing holes and the fixing rods are matched to effectively prevent the electrodialysis equipment from sinking the membrane stack in the use process.
Claims (5)
1. The utility model provides a high salt waste water super concentration device, includes raw water pump (1) and automatic control ware, its characterized in that: the water outlet of the raw water pump (1) is connected with the water inlet of the buffer tank (2) through a pipeline, the water outlet of the buffer tank (2) is connected with the water inlet pipeline of the first lifting pump (3), the water outlet of the first lifting pump (3) is connected with the water inlet of the air floatation device (4), the water outlet of the air floatation device (4) is connected with the multi-medium filter (6) through the second lifting pump (5), the water outlet of the multi-medium filter (6) is connected with the water inlet pipeline of the water softener (11), the water outlet of the water softener (11) is connected with the water inlet pipeline of the ultrafiltration device (12), the concentrated water outlet of the ultrafiltration device (12) is connected with the water inlet pipeline of the reverse osmosis device (14), and the clear water outlet of the ultrafiltration device (12) is connected with the fresh water tank (18) through a pipeline; the clear water outlet of the reverse osmosis device (14) is connected with a fresh water tank (18) in a pipeline manner, and the concentrated water outlet of the reverse osmosis device (14) is connected with a water inlet pipeline of the electrodialysis device (15); the concentrated water outlet of the electrodialysis device (15) is connected with the water inlet of the nanofiltration device (16), and the fresh water outlet of the electrodialysis device (15) is connected with the water inlet of the reverse osmosis device (14) through an electroosmosis return pipe (35); the concentrated water outlet of the nanofiltration equipment (16) is connected with a concentrated water tank (17) through a pipeline; the automatic controller is electrically connected with the raw water pump (1), the first lifting pump (3), the air floatation device (4), the second lifting pump (5), the multi-medium filter (6), the water softener (11), the ultrafiltration device (12), the reverse osmosis device (14), the electrodialysis device (15) and the nanofiltration device (16) respectively; the scale inhibitor tank (13) is connected with a water inlet pipeline of the reverse osmosis equipment (14) through the scale inhibitor pump (24); the electrodialysis device (15) comprises a separator (100); the partition board (100) comprises a first board body (101), a first partition net chamber is arranged in the middle of the first board body (101), a plurality of first water distribution holes (102) are formed in the upper end and the lower end of the first board body (101), and a plurality of first water distribution channels (103) are formed between the first water distribution holes (102) and the first partition net chamber; the first water distribution channels (103) at the upper end and the lower end of the first plate body (101) are arranged in a staggered mode; the first water distribution holes (102) are oblong, and the straight sides of the first water distribution holes (102) are parallel to the upper side of the first plate body (101); the section of the first water distribution channel (103) is arc-shaped; the first water distribution channel (103) comprises a vertical part (103-1), a first bending part (103-2) and a second bending part (103-3); the vertical part (103-1) is vertical to the straight edge of the first water distribution hole (102); the curvature radius of the first bending part (103-2) is smaller than that of the second bending part (103-3), and the bending directions of the first bending part (103-2) and the second bending part (103-3) are opposite; the partition board (100) further comprises a second board body (110), a second partition net chamber matched with the first partition net chamber is arranged in the middle of the second board body (110), and second water distribution holes (111) matched with the first water distribution holes (102) are formed at two ends of the second board body; the first plate body (101) and the second plate body (110) are connected through hot pressing or welding, and the second screen cavity and the first screen cavity form a screen cavity; the separation net (104) is welded or hot-pressed with the side wall of the separation net chamber.
2. The high salt wastewater super concentrating apparatus of claim 1, wherein: the device also comprises a TDS detector (23) and a three-way valve (25), wherein the TDS detector (23) is arranged on a pipeline between the water softener (11) and the ultrafiltration device (12); the three-way valve (25) is arranged on a pipeline between a clear water outlet of the ultrafiltration device (12) and a water inlet of the reverse osmosis device (14); the three-way valve (25) is connected with a water inlet of the electrodialysis device (15) through a branch water pipe (26); the TDS detector (23) and the three-way valve (25) are respectively and electrically connected with the automatic controller.
3. The high salt wastewater super concentrating apparatus of claim 1, wherein: the device also comprises backwashing equipment; the backwashing equipment comprises a water taking pump connected with a fresh water tank (18) through a pipeline, a water outlet of the water taking pump is connected with a water inlet pipeline of a backwashing tank (21), a water outlet of the backwashing tank (21) is connected with a water inlet of a backwashing pump (22), a water outlet of the backwashing pump (22) is connected with a backwashing water inlet of reverse osmosis equipment (14) through a main backwashing water pipe (27), and a first valve (29) is arranged at the backwashing water inlet of the reverse osmosis equipment (14); the backwash water outlet of the reverse osmosis equipment (14) is connected with the buffer tank (2) through a main backflow water pipe (28); the main backwash water pipe (27) is connected with a backwash water inlet of the ultrafiltration device (12) through a second valve (30), and a backwash water outlet of the ultrafiltration device (12) is connected with a main backwash water pipe (28); the main backwash water pipe (27) is connected with a backwash water inlet of the electrodialysis device (15) through a third valve (31), and a backwash water outlet of the electrodialysis device (15) is connected with a main backwash water pipe (28); the main backwash water pipe (27) is connected with a backwash water inlet of the nanofiltration equipment (16) through a fourth valve (32), and a backwash water outlet of the nanofiltration equipment (16) is connected with a main backwash water pipe (28); the main reflux water pipe (28) is connected with the buffer tank (2), the main backwash water pipe (27) is connected with a regeneration water inlet of the water softener (11) through a fifth valve (33), and a regeneration water outlet of the water softener (11) is connected with a sewage pipe; the main backwash water pipe (27) is connected with a backwash water inlet of the multi-medium filter (6) through a sixth valve (34), and a backwash water outlet of the multi-medium filter (6) is connected with a sewage pipe; the first valve (29), the second valve (30), the third valve (31), the fourth valve (32), the fifth valve (33), the sixth valve (34) and the water intake pump are respectively and electrically connected with the automatic controller.
4. A high salinity wastewater super concentrating apparatus according to claim 3, wherein: the backwashing tank (21) is connected with a medicament tank (19) through a medicament pump (20); the medicament pump (20) is electrically connected to an automation controller.
5. The high salt wastewater super concentrating apparatus of claim 1, wherein: a screen (104) is arranged in the first screen cavity, and the screen (104) is connected with the inner wall of the first screen cavity through welding or hot pressing; the meshes of the separation net (104) are regular hexagons.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205917110U (en) * | 2016-01-30 | 2017-02-01 | 内蒙古久科康瑞环保科技有限公司 | High intensive deep thickening system that contains salt industrial waste water |
| CN109502871A (en) * | 2019-01-08 | 2019-03-22 | 山东蓝然环境科技有限公司 | A kind of high-salinity wastewater zero-emission and divide salt resource utilization device |
| CN109851139A (en) * | 2018-12-28 | 2019-06-07 | 大唐环境产业集团股份有限公司 | High-salt wastewater softening and enrichment facility and method |
| CN212050901U (en) * | 2019-11-25 | 2020-12-01 | 山东奥淼科技发展有限公司 | Super enrichment facility of high salt waste water |
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2019
- 2019-11-25 CN CN201911165938.8A patent/CN112830605B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205917110U (en) * | 2016-01-30 | 2017-02-01 | 内蒙古久科康瑞环保科技有限公司 | High intensive deep thickening system that contains salt industrial waste water |
| CN109851139A (en) * | 2018-12-28 | 2019-06-07 | 大唐环境产业集团股份有限公司 | High-salt wastewater softening and enrichment facility and method |
| CN109502871A (en) * | 2019-01-08 | 2019-03-22 | 山东蓝然环境科技有限公司 | A kind of high-salinity wastewater zero-emission and divide salt resource utilization device |
| CN212050901U (en) * | 2019-11-25 | 2020-12-01 | 山东奥淼科技发展有限公司 | Super enrichment facility of high salt waste water |
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