CN113636674A - Device for removing silicon element in reactor coolant and treatment method thereof - Google Patents
Device for removing silicon element in reactor coolant and treatment method thereof Download PDFInfo
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- CN113636674A CN113636674A CN202110853410.0A CN202110853410A CN113636674A CN 113636674 A CN113636674 A CN 113636674A CN 202110853410 A CN202110853410 A CN 202110853410A CN 113636674 A CN113636674 A CN 113636674A
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- 239000002826 coolant Substances 0.000 title claims abstract description 39
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 38
- 239000010703 silicon Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 239000012528 membrane Substances 0.000 claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 239000003513 alkali Substances 0.000 claims abstract description 16
- 238000005342 ion exchange Methods 0.000 claims abstract description 16
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004327 boric acid Substances 0.000 claims abstract description 13
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000002351 wastewater Substances 0.000 claims description 28
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 8
- 229910052796 boron Inorganic materials 0.000 claims description 8
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- 239000003729 cation exchange resin Substances 0.000 claims description 6
- 229910001414 potassium ion Inorganic materials 0.000 claims description 5
- 229910001415 sodium ion Inorganic materials 0.000 claims description 5
- 238000004132 cross linking Methods 0.000 claims description 4
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012670 alkaline solution Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 3
- 238000000746 purification Methods 0.000 abstract description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052744 lithium Inorganic materials 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000003672 processing method Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 7
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 6
- 239000002910 solid waste Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Images
Classifications
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- 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
- C02F1/42—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
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
-
- 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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- 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)
Abstract
The invention relates to the technical field of borosilicate separation, in particular to a device for removing silicon element in reactor coolant and a processing method thereof, which comprises an original water tank with a water inlet pipe, a water production tank, an ion exchange column and a plurality of control valves, and is characterized by also comprising an alkali liquor adding tank and a membrane filter; an alkali liquor inlet of the raw water tank is connected with an alkali liquor adding tank through an alkali liquor conveying pump, and an outlet of the raw water tank is connected with a water inlet of the membrane filter through the raw water conveying pump; the water production outlet of the membrane filter is sequentially connected with a water production tank, a water production delivery pump and an ion exchange column; and a concentrated water outlet of the membrane filter is connected with a water return port of the raw water tank. Compared with the prior art, the invention can purify impurities such as silicon element, corrosion products and the like in the coolant in a targeted manner, and simultaneously does not influence the water chemistry background parameters such as boric acid, lithium and the like in the original coolant; the device can realize the purification and maintenance of the daily coolant and the selective purification when the silicon content exceeds the standard, thereby improving the utilization efficiency of the device.
Description
Technical Field
The invention relates to the technical field of borosilicate separation, in particular to a device for removing silicon element in reactor coolant and a treatment method thereof.
Background
In the water for the reactor coolant of a pressurized water reactor nuclear power station, silicic acid compounds are one of the impurities of great concern in water chemistry, and SiO is generated when the content of the silicic acid compounds in the coolant is high2The precipitate is easy to be deposited on the fuel cladding, so that the corrosion to the zirconium alloy material is increased, and the safe operation of the nuclear power station is seriously influenced. The same problem also exists in spent fuel pools, leading to the formation of localized radioactive hot spots.
Studies have shown that the increase in the silicon content of the coolant is closely related to the use of the purification system for purifying water and for trapping radioactive corrosion products in the water filter cartridge.
The radioactive water filter element is mainly used for removing corrosion products and suspended solid particles existing in water in the form of glue, and is important equipment for ensuring stable operation of a nuclear power plant. At present, domestic nuclear power plants are generally selecting water filter cartridges for both foreign companies, Pall and canada 3L. But the glass fiber in the filter leaches SiO under the action of the coolant2And along with the improvement of filter core precision, the leaching amount also continuously increases, and the primary loop coolant usually adopts the circulation mode of purifying, and the resin bed for purification is because operating temperature and resin self characteristic, and the exchange clearance to silicon is lower, therefore silicon can be along with factors such as the release of filter enrichment concentration more and more high in the return circuit.
The common practice of pressurized water reactor nuclear power plants for reactor coolants that exceed the silicon content is to replace a portion of the coolant during shutdown and overhaul, which results in the production of large amounts of waste liquid, or to use large amounts of new resins to adsorb silicon, which results in the production of large amounts of secondary waste, which has a detrimental effect on waste minimization and is costly. Meanwhile, the primary loop coolant with the silicon element exceeding the standard cannot be processed in the power plant power operation process, and certain risk is brought to the safe operation of the nuclear power plant.
The method is mainly used for efficiently removing the overproof silicon element in the coolant on line and purifying the impurities such as corrosion products and the like in the coolant without influencing other water chemical indexes including boron concentration, lithium concentration and the like in the coolant, so that the treated coolant is reused, and the aims of good process purification effect, high purification efficiency, low secondary solid waste generation amount, simplicity in operation and the like are fulfilled.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and design a device with simple process to selectively remove silicon elements, improve the exchange capacity and the separation efficiency and improve the recovery rate.
In order to achieve the purpose, the device for removing the silicon element in the reactor coolant comprises a raw water tank provided with a water inlet pipe, a water production tank, an ion exchange column, a plurality of control valves, and is characterized by also comprising an alkali liquor adding tank and a membrane filter;
an alkali liquor inlet of the raw water tank is connected with an alkali liquor adding tank through an alkali liquor conveying pump, and an outlet of the raw water tank is connected with a water inlet of the membrane filter through the raw water conveying pump; the water production outlet of the membrane filter is sequentially connected with a water production tank, a water production delivery pump and an ion exchange column; and a concentrated water outlet of the membrane filter is connected with a water return port of the raw water tank.
Furthermore, the exchange resin in the ion exchange column adopts hydrogen type high crosslinking degree macroporous cation exchange resin or gel type cation exchange resin.
Furthermore, the height of the exchange resin layer is 500-1500 mm.
Furthermore, a sewage discharge pipe is arranged on a pipeline between the raw water delivery pump and the membrane filter.
A treatment method of a device for removing silicon element in a reactor coolant is characterized in that when the reactor primary loop coolant or boron-containing wastewater is purified, the reactor primary loop coolant or the boron-containing wastewater is conveyed into a raw water tank to be used as raw wastewater, excessive alkaline solution is added into the raw water tank to adjust the pH of the raw wastewater to 7, borate and silicate with higher solubility are formed, and boric acid crystallization and SiO (silicon dioxide) caused in the concentration process of a membrane filter in the later period are avoided2Scaling; then the membrane filter passes through a raw water delivery pump and is discharged from a raw water tank by 1-100 m3The pH value of the raw wastewater is adjusted at a flow speed of/h, borate and silicate in the raw wastewater are separated, silicon elements with extremely low concentration and high-valence ionic impurities in the raw wastewater are concentrated after being separated by a membrane filter and return to a raw water tank, and when the total recovery rate of the device reaches more than 99%, the device stops running; and the permeated wastewater containing borate enters a water production tank, enters an ion exchange column at the flow speed of 10-100 BV/h to remove redundant sodium/potassium ions and various corrosion products, and reduces the borate into boric acid.
Further, the single-pass removal rate of the film filter on silicate is greater than 95%, and the single-pass transmittance of borate is greater than 90%.
Compared with the prior art, the invention has the following advantages:
1. the invention can purify the impurities such as silicon element, corrosion products and the like in the coolant in a targeted manner, and simultaneously does not influence the water chemistry background parameters such as boric acid, lithium and the like in the original coolant; the defects that the traditional coolant purification process cannot selectively remove silicon elements, has weak exchange capacity and generates a large amount of solid waste, or the traditional mode can only dilute and discharge the silicon elements by integrally replacing the coolant, so that the economic cost is high and the generation amount of waste liquid is increased are overcome;
2. the method solves the technical problems that the traditional membrane treatment process only can carry out physical concentration, and the concentrated solution needs to be treated by adopting complicated processes such as evaporation and the like, or the problems that the process is complicated, the generation amount of solid waste is large, the water chemical property in the coolant is changed and the like caused by the fact that silicon and boron/lithium cannot be efficiently separated are solved;
3. the technical difficulty that the recycling total amount of the primary loop coolant is influenced due to low system recovery rate caused by the technical difficulty that the silicon concentration ratio of the traditional membrane treatment process is low is solved;
4. the device can realize the purification and maintenance of the daily coolant and the selective purification when the silicon content exceeds the standard, thereby improving the utilization efficiency of the device.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Example 1
Referring to fig. 1, a device for removing silicon element in reactor coolant comprises a raw water tank 1 provided with a water inlet pipe, a water production tank 4, an ion exchange column 5, a plurality of control valves, and is characterized by further comprising an alkali liquor adding tank 2 and a membrane filter 3;
an alkali liquor inlet of the raw water tank 1 is connected with the alkali liquor adding tank 2 through an alkali liquor conveying pump 21, and an outlet of the raw water tank 1 is connected with a water inlet of the membrane filter 3 through a raw water conveying pump 11; the water production outlet of the membrane filter 3 is sequentially connected with a water production tank 4, a water production delivery pump 41 and an ion exchange column 5; and a concentrated water outlet of the membrane filter 3 is connected with a water return port of the raw water tank 1.
Furthermore, the exchange resin in the ion exchange column 5 adopts hydrogen type high crosslinking degree macroporous cation exchange resin or gel type cation exchange resin.
Furthermore, the height of the exchange resin layer is 500-1500 mm.
Further, a sewage discharge pipe 12 is arranged on a pipeline between the raw water delivery pump 11 and the membrane filter 3 and used for discharging sewage regularly.
Example 2
The method for treating the device for removing silicon in reactor coolant in example 1 is characterized in that when the reactor primary loop coolant or the boron-containing wastewater is purified, the reactor primary loop coolant or the boron-containing wastewater is conveyed into the raw water tank 1 as raw wastewater, and the raw wastewater is adjusted to pH (from long to long) by adding excessive alkaline solution into the raw water tank 17, formation of more highly soluble borates and silicates to avoid crystallization of boric acid and SiO during the post-concentration of the membrane filter 32Scaling; then the membrane filter 3 is driven by the raw water pump 11 to flow 1-100 m from the raw water tank 13The pH value of the raw wastewater is adjusted at the flow speed of/h, borate and silicate in the raw wastewater are separated, silicon element with extremely low concentration and high-valence ionic impurities in the raw wastewater are separated by a membrane filter 3, then the raw wastewater is concentrated and returns to a raw water tank 1, and when the total recovery rate of the device reaches more than 99 percent, the operation is stopped; and the permeated wastewater containing borate enters a water production tank 4, enters an ion exchange column 5 at the flow speed of 10-100 BV/h to remove redundant sodium/potassium ions and various corrosion products, and reduces the borate into boric acid.
In this example, the single pass removal rate of the membrane filter 3 for silicate was greater than 95%, and the single pass transmission rate of borate was greater than 90%.
The processing device and the method of the invention are characterized in that:
the pH value of the original wastewater is utilized to improve the solubility of the boric acid and the metasilicic acid, and the boric acid crystallization and SiO during the treatment of the membrane filter are avoided2Scaling, namely treating the raw wastewater after the pH is adjusted by a membrane filter with high separation rate, and efficiently separating silicon from boric acid. The silicon element with extremely low concentration and other high valence ionic impurities in the original wastewater are concentrated, the single treatment removal rate of the membrane filter to silicon is more than 95%, and the single transmittance of boron is more than 90%. The produced water passes through the ion exchange column 5, so that redundant sodium/potassium ions and various corrosion products are removed, and borate is reduced into boric acid, the reuse efficiency is improved, and the generation amount of solid waste is reduced; the device solves the problems that the conventional membrane treatment system only can simply carry out physical concentration and the membrane system recovery rate is low because the silicon concentration is required to be controlled not to be too high in order to avoid silicon deposition in concentrated water, the total recovery rate of the device can be more than 99 percent, the total concentration ratio of the concentrated solution is less than 1 percent, and the concentration ratio can be more than 100;
relative ion exchange resin for removing SiO2The process utilizes the advantage that the exchange capacity of the cation resin with high crosslinking degree to elements such as sodium, potassium and the like is far higher than that of the anion resin to silicon, thereby greatly reducing the number of treesThe filling amount of the resin and the final solid waste generation amount of the resin are utilized, and the selective difference of the resin to sodium, potassium and lithium is utilized to control the operation end point of a resin bed in the ion exchange column 5 to be that sodium or potassium ions start to leak, so that the concentration of lithium in a loop is ensured to be unchanged as far as possible, the influence on the chemical property of the loop water is avoided, borate is reduced into boric acid, and the purification and reuse efficiency is improved;
the membrane filter 3 in the device can select the combination quantity of the membranes according to the treatment requirement, flexibly adjust the treatment flow, and is widely suitable for purifying and reusing various raw water containing silicon element when various nuclear power plants and nuclear facilities run.
Claims (6)
1. A device for removing silicon element in reactor coolant comprises a raw water tank (1) provided with a water inlet pipe, a water production tank (4), an ion exchange column (5) and a plurality of control valves, and is characterized by also comprising an alkali liquor adding tank (2) and a membrane filter (3);
an alkali liquor inlet of the raw water tank (1) is connected with the alkali liquor adding tank (2) through an alkali liquor conveying pump (21), and an outlet of the raw water tank (1) is connected with a water inlet of the membrane filter (3) through a raw water conveying pump (11); a water production outlet of the membrane filter (3) is sequentially connected with a water production tank (4), a water production delivery pump (41) and an ion exchange column (5); and a concentrated water outlet of the membrane filter (3) is connected with a return water inlet of the raw water tank (1).
2. The apparatus for removing silicon element from reactor coolant as claimed in claim 1, wherein the exchange resin in the ion exchange column (5) is hydrogen type high crosslinking degree macroporous cation exchange resin or gel type cation exchange resin.
3. The apparatus for removing silicon element in reactor coolant according to claim 2, wherein the height of the exchange resin layer is 500-1500 mm.
4. The apparatus for removing elemental silicon from a reactor coolant as claimed in claim 1, characterized in that a drain pipe (12) is further provided on the piping between the raw water feed pump (11) and the membrane filter (3).
5. A method for treating a plant according to any of claims 1 to 4, characterized in that when purifying the reactor primary coolant or the boron-containing waste water, it is fed into the raw water tank (1) as raw waste water, and the pH of the raw waste water is adjusted to-7 by adding an excess of alkaline solution into the raw water tank (1) to form borate and silicate with higher solubility, so as to avoid the crystallization of boric acid and SiO caused during the concentration process of the membrane filter (3) at the later stage2Scaling; then the membrane filter (3) is conveyed from the raw water tank (1) by a raw water conveying pump (11) at a distance of 1-100 m3The pH value of the raw wastewater is adjusted at a flow rate of/h, borate and silicate in the raw wastewater are separated, silicon element with extremely low concentration and high-valence ionic impurities in the raw wastewater are separated by a membrane filter (3), then the raw wastewater is concentrated and returned to a raw water tank (1), and when the total recovery rate of the device reaches more than 99%, the operation is stopped; and the permeated wastewater containing borate enters a water production tank (4), enters an ion exchange column (5) at the flow speed of 10-100 BV/h to remove redundant sodium/potassium ions and various corrosion products, and reduces the borate into boric acid.
6. The treatment process according to claim 5, wherein the membrane filter (3) has a single pass removal of silicate of greater than 95% and a single pass transmission of borate of greater than 90%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117867295A (en) * | 2024-03-12 | 2024-04-12 | 上海源依青科技有限责任公司 | Method for extracting lithium from salt lake and separating impurity silicon |
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- 2021-07-27 CN CN202110853410.0A patent/CN113636674A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117867295A (en) * | 2024-03-12 | 2024-04-12 | 上海源依青科技有限责任公司 | Method for extracting lithium from salt lake and separating impurity silicon |
| CN117867295B (en) * | 2024-03-12 | 2024-05-31 | 上海源依青科技有限责任公司 | Method for extracting lithium from salt lake and separating impurity silicon |
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Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Applicant after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Applicant before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
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Application publication date: 20211112 |