CN220951461U - Treatment device based on high salinity waste water - Google Patents
Treatment device based on high salinity waste water Download PDFInfo
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- CN220951461U CN220951461U CN202322491564.7U CN202322491564U CN220951461U CN 220951461 U CN220951461 U CN 220951461U CN 202322491564 U CN202322491564 U CN 202322491564U CN 220951461 U CN220951461 U CN 220951461U
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- 239000002351 wastewater Substances 0.000 title claims abstract description 52
- 239000013505 freshwater Substances 0.000 claims abstract description 80
- 238000000909 electrodialysis Methods 0.000 claims abstract description 77
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- 239000012528 membrane Substances 0.000 claims abstract description 27
- 239000012141 concentrate Substances 0.000 claims abstract description 18
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 17
- 238000010992 reflux Methods 0.000 claims abstract description 15
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 63
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 10
- 230000008020 evaporation Effects 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 10
- 238000007872 degassing Methods 0.000 claims description 6
- 238000004065 wastewater treatment Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model discloses a high salinity wastewater-based treatment device, which comprises a softening three-header, a tubular ultrafiltration membrane mechanism, a reverse osmosis mechanism and an electrodialysis concentration mechanism which are sequentially connected, wherein the electrodialysis concentration mechanism comprises a first-stage fresh water tank, the outside of the first-stage fresh water tank is respectively connected with a second-stage fresh water tank and an electrodialysis first-stage concentration device, the first-stage fresh water tank and the second-stage fresh water tank are mutually connected through an overflow pipe, the outside of the second-stage fresh water tank is connected with an electrodialysis second-stage concentration device, and the outsides of the electrodialysis first-stage concentration device and the electrodialysis second-stage concentration device are both connected with a concentrate tank; the outside of the concentrate tank is respectively provided with a first concentrate circulating pipe for refluxing the concentrate to the electrodialysis primary concentration device and a second concentrate circulating pipe for refluxing the concentrate to the electrodialysis secondary concentration device. The utility model can improve the concentration effect of the electrodialysis device, thereby reducing the treatment cost of wastewater.
Description
Technical Field
The utility model relates to a desulfurization wastewater treatment device, in particular to a high-salinity wastewater-based treatment device.
Background
The desulfurization waste water of the thermal power plant needs to be treated by the device in the discharge process, so that pollutants such as calcium ions, magnesium ions and the like in the desulfurization waste water are prevented from damaging the natural environment after being directly discharged. On the basis, the prior patent discloses a high-salt high-hardness wastewater treatment system, which comprises a softening concentration tank, a tubular ultrafiltration membrane and a reverse osmosis device which are sequentially connected, wherein the softening concentration tank is used for removing hardness, organic matters and heavy metals of desulfurization wastewater by adopting a softening method during use, then the treated water is concentrated and then is sent into the tubular ultrafiltration membrane, and the tubular ultrafiltration membrane is used for removing impurities such as particles, colloid, suspended matters, high-molecular organic matters and the like in the treated water, so that the SDI value and turbidity of the treated water are reduced. The filtered wastewater sequentially enters a reverse osmosis device and an electrodialysis concentration device, so that the wastewater is subjected to advanced treatment by the device, harmful substances such as heavy metals, chemical substances, bacterial viruses, radioactive substances and the like in the wastewater are removed, and the dischargeable or recyclable fresh water is formed.
The prior electrodialysis device for wastewater is shown in patent 201710505180.2, and comprises a primary electrodialysis device and a secondary electrodialysis device which are sequentially connected, so that the wastewater can be sequentially treated by the primary electrodialysis device and the secondary electrodialysis device after entering, the treated fresh water is directly discharged, and the concentrated water is discharged in batches. However, the high-salt and high-hardness wastewater treatment system has the defect that the salt content of concentrated water after concentration is below 200000mg/L, namely the optimal concentration of the electrodialysis device cannot be achieved, if the salt content of wastewater entering the electrodialysis device is less than 15000mg/L, as seen from the current experience of using the electrodialysis device. When the salt content of the concentrated water is reduced, the evaporation capacity of the subsequent evaporation device is increased, so that the energy consumption and the treatment cost of the evaporation device are increased. The above-mentioned method for treating the concentrated water by electrodialysis device is that the concentrated water after the first-stage electrodialysis is directly discharged, and the concentrated water after the second-stage electrodialysis is discharged after the second-stage electrodialysis is treated again, so that it cannot ensure that the concentration value of the concentrated water reaches the optimal concentration of the electrodialysis device, i.e. the subsequent cost for treating the concentrated water is increased.
Therefore, the existing high-salt high-hardness wastewater treatment system has the problem of high treatment cost.
Disclosure of utility model
The utility model aims to provide a treatment device based on high-salinity wastewater. The concentration effect of the electrodialysis device can be improved, so that the treatment cost of wastewater is reduced.
The technical scheme of the utility model is as follows: the high salinity wastewater-based treatment device comprises a softening three-header, a tubular ultrafiltration membrane mechanism, a reverse osmosis mechanism and an electrodialysis concentration mechanism which are sequentially connected, wherein the electrodialysis concentration mechanism comprises a first-stage fresh water tank, a second-stage fresh water tank and an electrodialysis first-stage concentration device are respectively connected to the outer part of the first-stage fresh water tank, the first-stage fresh water tank and the second-stage fresh water tank are connected with each other through overflow pipes, an electrodialysis second-stage concentration device is connected to the outer part of the second-stage fresh water tank, and concentrated water tanks are connected to the outer parts of the electrodialysis first-stage concentration device and the electrodialysis second-stage concentration device; the outside of the concentrated water tank is respectively provided with a first concentrated water circulating pipe for refluxing concentrated water to the electrodialysis primary concentration device and a second concentrated water circulating pipe for refluxing concentrated water to the electrodialysis secondary concentration device, the outside of the electrodialysis primary concentration device is provided with a first fresh water circulating pipe for refluxing fresh water to the primary fresh water tank, and the outside of the electrodialysis secondary concentration device is provided with a second fresh water circulating pipe for refluxing fresh water to the secondary fresh water tank.
In the high-salinity wastewater-based treatment device, a bypass flue evaporation mechanism is connected to the outside of the concentrate tank.
In the treatment device based on high salinity wastewater, the water producing tank is connected with the outside of the secondary fresh water tank through the overflow pipe.
In the treatment device based on high salinity wastewater, the front end of the softening three-connecting box is provided with the aeration tank, and the outer part of the water producing box is connected with the aeration tank through the fresh water return pipe.
In the high-salinity wastewater-based treatment device, a pH adjusting tank, a degassing mechanism and a softening water tank which are sequentially connected are arranged between the tubular ultrafiltration membrane mechanism and the reverse osmosis device.
In the treatment device based on high salinity waste water, the tubular ultrafiltration membrane mechanism comprises a circulating filter pipe, the outside of the circulating filter pipe is respectively provided with a waste water inlet pipe and a concentration return pipe which are connected with a softening triple tank, the circulating filter pipe is provided with a tubular membrane component, and the tubular membrane component is provided with a fresh water outlet pipe connected with a pH regulating tank.
In the treatment device based on high salinity waste water, the softening three-connecting box comprises a first reaction tank, a second reaction tank and a concentration tank which are sequentially connected, and the outside of the concentration tank is connected with the circulating filter pipe through a waste water inlet pipe and a concentration return pipe respectively.
Compared with the prior art, the utility model has the following characteristics:
(1) According to the utility model, through structural optimization of the electrodialysis concentration mechanism, concentrated water treated by the electrodialysis primary concentration device and the electrodialysis secondary concentration device enters the concentrated water tank together and flows back to the electrodialysis primary concentration device and the electrodialysis secondary concentration device respectively for circulation treatment, a manufacturer can detect the salinity of the concentrated water in the concentrated water tank, and when the concentrated water reaches the optimal concentration of the electrodialysis device, the concentrated water is discharged, so that the subsequent treatment cost of the concentrated water is effectively reduced;
(2) The electrodialysis primary concentration device and the electrodialysis secondary concentration device are connected to the concentrate tank together, so that concentrate discharged after treatment by the electrodialysis primary concentration device and the electrodialysis secondary concentration device can be stored in the concentrate tank at the same time, and the actions of the electrodialysis primary concentration device and the electrodialysis secondary concentration device are mutually independent, thereby effectively improving the treatment effect of the concentrate;
(3) Through the pH adjusting tank and the degassing mechanism which are arranged between the ultrafiltration membrane mechanism and the reverse osmosis device, carbonate in water can be converted into carbon dioxide before the wastewater enters the reverse osmosis device, and then the carbon dioxide is removed through the degassing mechanism, so that the salt content of the wastewater entering the reverse osmosis device is reduced, namely the desalination rate of the reverse osmosis device to the wastewater is improved;
Therefore, the utility model can improve the concentration effect of the electrodialysis device, thereby reducing the treatment cost of wastewater.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic structural view of an electrodialysis concentration mechanism;
FIG. 3 is a schematic structural view of a tubular ultrafiltration membrane mechanism.
The marks in the drawings are: the device comprises a 1-softening triple tank, a 2-tubular ultrafiltration membrane mechanism, a 3-reverse osmosis mechanism, a 4-electrodialysis concentration mechanism, a 5-first-stage fresh water tank, a 6-second-stage fresh water tank, a 7-electrodialysis first-stage concentration device, an 8-overflow pipe, a 9-electrodialysis second-stage concentration device, a 10-concentrate tank, a 11-first concentrate circulation pipe, a 12-second concentrate circulation pipe, a 13-first fresh water circulation pipe, a 14-second fresh water circulation pipe, a 15-bypass flue evaporation mechanism, a 16-water production tank, a 17-aeration tank, a 18-fresh water return pipe, a 19-pH adjusting tank, a 20-degassing mechanism, a 21-softening water tank, a 22-circulation filter pipe, a 23-wastewater inlet pipe, a 24-concentration return pipe, a 25-tubular membrane assembly, a 101-first reaction tank, a 102-second reaction tank and a 103-concentration tank.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. The treatment device based on the high salinity wastewater is shown in the figure 1, and comprises a softening three-header 1, a tubular ultrafiltration membrane mechanism 2, a reverse osmosis mechanism 3 and an electrodialysis concentration mechanism 4 which are sequentially connected, wherein the reverse osmosis mechanism 3 is a high salinity high hardness reverse osmosis device with the conventional recovery rate reaching 50%, so that the treated concentrated water reaches TDS more than or equal to 30000mg/L; the electrodialysis concentration mechanism 4 comprises a first-stage fresh water tank 5, a second-stage fresh water tank 6 and an electrodialysis first-stage concentration device 7 are respectively connected to the outer part of the first-stage fresh water tank 5, the first-stage fresh water tank 5 and the second-stage fresh water tank 6 are connected with each other through an overflow pipe 8, an electrodialysis second-stage concentration device 9 is connected to the outer part of the second-stage fresh water tank 6, and a concentrate tank 10 is connected to the outer parts of the electrodialysis first-stage concentration device 7 and the electrodialysis second-stage concentration device 9; the outside of the concentrated water tank 10 is respectively provided with a first concentrated water circulating pipe 11 for refluxing concentrated water to the electrodialysis primary concentration device 7 and a second concentrated water circulating pipe 12 for refluxing concentrated water to the electrodialysis secondary concentration device 9, the outside of the electrodialysis primary concentration device 7 is provided with a first fresh water circulating pipe 13 for refluxing fresh water to the primary fresh water tank 5, and the outside of the electrodialysis secondary concentration device 9 is provided with a second fresh water circulating pipe 14 for refluxing fresh water to the secondary fresh water tank 6; TDS detection mechanisms are arranged in the first-stage fresh water tank 5, the second-stage fresh water tank 6 and the concentrated water tank 10.
The outside of the concentrate tank 10 is connected with a bypass flue evaporation mechanism 15, and the bypass flue evaporation mechanism 15 can be a conventional spray dryer.
The outside of the secondary fresh water tank 6 is connected with a water production tank 16 through an overflow pipe 8.
An aeration tank 17 is arranged at the front end of the softening three-connecting box 1, and the outside of the water producing tank 16 is connected with the aeration tank 17 through a fresh water return pipe 18.
A pH adjusting tank 19, a degassing mechanism 20 and a softening water tank 21 which are sequentially connected are arranged between the tubular ultrafiltration membrane mechanism 2 and the reverse osmosis device.
The tubular ultrafiltration membrane mechanism 2 comprises a circulating filter pipe 22 which is arranged in an annular shape, a circulating water pump which is used for enabling wastewater to circulate in the circulating filter pipe 22 is arranged on the circulating filter pipe 22, a wastewater inlet pipe 23 and a concentration return pipe 24 which are connected with a softening three-header 1 are respectively arranged outside the circulating filter pipe 22, a tubular membrane assembly 25 which is formed by sequentially connecting a plurality of tubular filter membranes is arranged on the circulating filter pipe 22, the diameter of a membrane inner hole of the tubular filter membrane can be set to be 8mm, the water yield is 80-100LMH, and an exhaust pipe and a fresh water outlet pipe which is connected with a pH adjusting tank 19 are respectively arranged on the tubular membrane assembly 25.
The softening three-connecting box 1 comprises a first reaction tank 101, a second reaction tank 102 and a concentration tank 103 which are sequentially connected, wherein stirrers are arranged in the first reaction tank 101, the second reaction tank 102 and the concentration tank 103, and the outside of the concentration tank 103 is connected with a circulating filter pipe 22 through a wastewater inlet pipe 23 and a concentration return pipe 24 respectively; the fresh water outlet pipe is provided with a fresh water branch pipe for refluxing part of fresh water into the concentration tank 103.
The working principle of the utility model is as follows: the desulfurized wastewater enters an aeration tank 17 for air aeration, thereby preventing the deposition of large-particle impurities in the water. Meanwhile, the wastewater in the aeration tank 17 is pumped into the first reaction tank 101 and the second reaction tank 102 in sequence by a lifting pump, so that the magnesium hardness in the wastewater is reduced to be less than or equal to 40mg/L, the silicon is reduced to be less than or equal to 20mg/L, the calcium hardness is reduced to be less than or equal to 20mg/L, and the pH value of the wastewater is over 11.5 by adding a softening auxiliary agent into the reaction tanks. The softened wastewater enters a concentration tank 103, and then the wastewater and the sludge are sent to a circulating filter pipe 22 together by a tubular membrane lifting pump, so that the wastewater is filtered by a tubular membrane assembly 25 to produce fresh water with SDI less than or equal to 3 and turbidity less than or equal to 1. The filtered fresh water enters a pH adjusting tank 19, is adjusted to 7 by adding hydrochloric acid, is sent into a degasser to remove carbon dioxide, and is sent into a softening water tank 21. The filtered sludge is returned to the concentration tank 103, and is discharged from the concentration tank 103.
The softened wastewater enters a first-stage fresh water tank 5 after being concentrated by a reverse osmosis mechanism 3, the wastewater is sent into an electrodialysis first-stage concentration device 7 by the first-stage fresh water tank 5 for concentration, concentrated water generated by concentration is sent into a concentrated water tank 10, and the concentrated water is respectively sent into the electrodialysis first-stage concentration device 7 and an electrodialysis second-stage concentration device 9 by the concentrated water tank 10 through a first concentrated water circulation pipe 11 and a second concentrated water circulation pipe 12 for concentration again; the fresh water flows back to the first fresh water tank 5 through the first fresh water circulation pipe 13 for circulation treatment. In the circulating concentration process, the salt content of the fresh water is detected by the first-stage fresh water tank 5, and when the TDS value of the fresh water reaches below 100000mg/L, the fresh water enters the second-stage fresh water tank 6 through the overflow pipe 8, and is treated by the electrodialysis second-stage concentration device 9. When the TDS value of the fresh water circularly treated in the secondary fresh water tank 6 reaches below 10000mg/L, the fresh water is discharged into the water producing tank 16 by the secondary fresh water tank 6 for recycling; when the TDS value of the concentrated water in the concentrated water tank 10 reaches over 200000mg/L, the concentrated water is sent to the bypass flue evaporation mechanism 15 for evaporation. Under the cooperation, the application can respectively realize the circulation treatment of the concentrated water and the fresh water, and the concentration procedures of the electrodialysis primary concentration device 7 and the electrodialysis secondary concentration device 9 can be synchronously carried out, thereby effectively improving the treatment efficiency of the wastewater and reducing the subsequent treatment cost.
Claims (7)
1. Treatment device based on high salinity waste water, including three header (1) of softening, tubular milipore filter mechanism (2), reverse osmosis mechanism (3) and electrodialysis concentration mechanism (4) that connect gradually, its characterized in that: the electrodialysis concentration mechanism (4) comprises a first-stage fresh water tank (5), a second-stage fresh water tank (6) and an electrodialysis first-stage concentration device (7) are respectively connected to the outer part of the first-stage fresh water tank (5), the first-stage fresh water tank (5) and the second-stage fresh water tank (6) are connected with each other through an overflow pipe (8), an electrodialysis second-stage concentration device (9) is connected to the outer part of the second-stage fresh water tank (6), and a concentrate tank (10) is connected to the outer parts of the electrodialysis first-stage concentration device (7) and the electrodialysis second-stage concentration device (9); the outside of the strong water tank (10) is provided with a first strong water circulating pipe (11) for refluxing strong water to the electrodialysis primary concentration device (7) and a second strong water circulating pipe (12) for refluxing strong water to the electrodialysis secondary concentration device (9) respectively, the outside of the electrodialysis primary concentration device (7) is provided with a first fresh water circulating pipe (13) for refluxing fresh water to the primary fresh water tank (5), and the outside of the electrodialysis secondary concentration device (9) is provided with a second fresh water circulating pipe (14) for refluxing fresh water to the secondary fresh water tank (6).
2. The high salinity wastewater-based treatment device according to claim 1, wherein: and a bypass flue evaporation mechanism (15) is connected to the outside of the concentrate tank (10).
3. The high salinity wastewater-based treatment device according to claim 1, wherein: the outside of the secondary fresh water tank (6) is connected with a water producing tank (16) through an overflow pipe (8).
4. A high salinity wastewater treatment device according to claim 3, wherein: the front end of the softening three-connecting box (1) is provided with an aeration tank (17), and the outside of the water producing box (16) is connected with the aeration tank (17) through a fresh water return pipe (18).
5. The high salinity wastewater-based treatment device according to claim 1, wherein: a pH adjusting tank (19), a degassing mechanism (20) and a softening water tank (21) which are sequentially connected are arranged between the tubular ultrafiltration membrane mechanism (2) and the reverse osmosis device.
6. The high salinity wastewater-based treatment device according to claim 1, wherein: the tubular ultrafiltration membrane mechanism (2) comprises a circulating filtration pipe (22), the outside of the circulating filtration pipe (22) is respectively provided with a wastewater inlet pipe (23) and a concentration return pipe (24) which are connected with a softening three-header (1), the circulating filtration pipe (22) is provided with a tubular membrane component (25), and the tubular membrane component (25) is provided with a fresh water outlet pipe connected with a pH regulating tank (19).
7. The high salinity wastewater-based treatment device according to claim 6, wherein: the softening three-connecting box (1) comprises a first reaction tank (101), a second reaction tank (102) and a concentration tank (103) which are sequentially connected, wherein the outside of the concentration tank (103) is connected with a circulating filter pipe (22) through a wastewater inlet pipe (23) and a concentration return pipe (24) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322491564.7U CN220951461U (en) | 2023-09-14 | 2023-09-14 | Treatment device based on high salinity waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322491564.7U CN220951461U (en) | 2023-09-14 | 2023-09-14 | Treatment device based on high salinity waste water |
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| Publication Number | Publication Date |
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| CN220951461U true CN220951461U (en) | 2024-05-14 |
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| CN202322491564.7U Active CN220951461U (en) | 2023-09-14 | 2023-09-14 | Treatment device based on high salinity waste water |
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