CN114275961A - Concentrated decrement system of strong brine - Google Patents
Concentrated decrement system of strong brine Download PDFInfo
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- CN114275961A CN114275961A CN202210133879.1A CN202210133879A CN114275961A CN 114275961 A CN114275961 A CN 114275961A CN 202210133879 A CN202210133879 A CN 202210133879A CN 114275961 A CN114275961 A CN 114275961A
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- water
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- tank
- decrement
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- 239000012267 brine Substances 0.000 title claims abstract description 25
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000013505 freshwater Substances 0.000 claims abstract description 26
- 239000002351 wastewater Substances 0.000 claims abstract description 26
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 25
- 239000010703 silicon Substances 0.000 claims abstract description 25
- 230000003647 oxidation Effects 0.000 claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 22
- 238000005342 ion exchange Methods 0.000 claims abstract description 20
- 238000002425 crystallisation Methods 0.000 claims abstract description 19
- 230000008025 crystallization Effects 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 230000003750 conditioning effect Effects 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 238000001223 reverse osmosis Methods 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 238000000108 ultra-filtration Methods 0.000 claims description 9
- 238000005496 tempering Methods 0.000 claims description 7
- 238000010612 desalination reaction Methods 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 150000003839 salts Chemical class 0.000 abstract description 5
- 150000001768 cations Chemical class 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000000084 colloidal system Substances 0.000 description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 238000010979 pH adjustment Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
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Abstract
The invention discloses a concentrated and reduced brine system, which comprises: the system comprises a conditioning water tank, a silicon removal unit, a ph adjusting tank, an oxidation unit, a filtering pretreatment device, an ion exchange device, a carbon remover and a concentration reduction device; the silicon removal unit, the ph adjusting tank, the oxidation unit and the filtering pretreatment device are connected between the conditioning water tank and the ion exchange device, the carbon remover, the ion exchange device water tank and the concentration reduction device are sequentially connected. The system is used for treating high-salinity concentrated water, the water quantity of the concentrated water can be reduced, the salt content of the concentrated water is improved, and high-salinity wastewater is recycled through the evaporative crystallization device; the device is used for treating high-salinity wastewater of a power plant, and the produced fresh water is recycled, so that zero discharge of the wastewater is realized, and the environmental protection standard required by the state is reached.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a concentrated and reduced brine system.
Background
With the development of society and the continuous progress of science and technology, the pollution of industry to the environment is increasingly serious, so that the national protection of environmental protection is more and more emphasized.
Especially for the current thermal power plants, the supervision is also increasing. For a new project, the environmental assessment and the approval are directly zero emission; for the operation project, the wastewater system needs to be modified, and zero emission is realized.
Therefore, the wastewater generated by the power plant can be directly recycled after being treated with low salt content, and the high-salt wastewater cannot be directly utilized.
Therefore, how to treat the high-salinity wastewater becomes an important technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of this, the invention provides a concentrated brine decrement system, which is used for treating high-salinity wastewater, wherein the treated water can directly enter an evaporative crystallization device, the generated fresh water is recycled, and salt is sold externally.
In order to achieve the purpose, the invention provides the following technical scheme:
a strong brine concentrating and reducing system comprises: the system comprises a conditioning water tank, a silicon removal unit, a ph adjusting tank, an oxidation unit, a filtering pretreatment device, an ion exchange device, a carbon remover and a concentration reduction device;
the silicon removal unit, the ph adjusting tank, the oxidation unit and the filtering pretreatment device are connected between the conditioning water tank and the ion exchange device, the carbon remover, the ion exchange device water tank and the concentration reduction device are sequentially connected.
Preferably, a fresh water outlet of the concentration and reduction device is connected with a fresh water tank of the concentration and reduction device, the outlet water of the fresh water tank of the concentration and reduction device is subjected to reverse osmosis desalination at the fresh water side of the concentration and reduction device, and a concentrated water outlet is connected with the conditioning water tank.
Preferably, the inlet of the tempering water tank is communicated with the high-salinity wastewater of the power plant, the effluent of the wastewater collecting tank and the reverse osmosis concentrated water on the fresh water side of the concentration and reduction device.
Preferably, the silicon removal unit is used for adding a medicament to precipitate silicon in water;
concentrated decrement system of strong brine still includes: a dewatering device; the dehydration device is used for dehydrating the chemical sludge generated by silicon removal.
Preferably, the pH adjustment tank is used to adjust the pH to 4 by adding hydrochloric acid.
Preferably, the oxidation unit includes: and the Fenton oxidation unit is used for removing COD in the water.
Preferably, the filtration pretreatment apparatus includes: multi-media filters and ultrafiltration.
Preferably, the ion exchange device comprises: weak acid bed for sexual intercourse.
Preferably, the silicon removal unit, the ph callback pool, the oxidation unit and the filtering pretreatment device are connected in sequence.
Preferably, the method further comprises the following steps: an evaporative crystallization device;
and a concentrated water buffer tank of the concentration and decrement device is connected with the evaporative crystallization device.
According to the technical scheme, the concentrated brine concentration and reduction system provided by the invention can be used for treating high-salinity concentrated water, the water quantity of the concentrated water can be reduced, the salt content of the concentrated water is improved, and high-salinity wastewater is recycled through the evaporation and crystallization device; the system is applied to treating the high-salinity wastewater of the power plant, the produced fresh water is recycled, the zero discharge of the wastewater is realized, and the environmental protection standard required by the state is reached.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a concentrated brine concentration and decrement system according to an embodiment of the present invention.
Wherein, 1 is a tempering water tank, 2 is a desiliconization unit, 3 is a ph adjusting tank, 4 is an oxidation unit, 5 is a multi-medium filter, 6 is ultrafiltration, 7 is a weak acid cation bed, 8 is a decarbonizer, 9 is an ion exchange device production water tank, 10 is a concentration and decrement device, and 11 is a concentration and decrement device fresh water tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The concentrated brine decrement system that the embodiment of the invention provides includes: the system comprises a tempering water tank 1, a silicon removal unit 2, a ph callback pool 3, an oxidation unit 4, a filtering pretreatment device, an ion exchange device, a carbon remover 8 and a concentration reduction device 10; the structure of which can be seen in figure 1;
wherein, remove silicon unit 2, ph callback pond 3, oxidation unit 4, filter preprocessing device and connect between quenching and tempering water tank 1 and ion exchange device, decarbonizer 8, ion exchange device produce water tank 9 and concentrated decrement device 10 and connect gradually.
According to the concentrated and reduced brine system provided by the embodiment of the invention, after the high-salinity wastewater is homogenized in the water quantity and the water quality in the tempering water tank 1, most of silicon in the water is precipitated in the silicon removal unit 2, most of COD in the water is removed in the oxidation unit 4, and insoluble substances are precipitated; suspended matters and colloid in the water are removed through a filtering pretreatment device, the turbidity of the water is reduced, and the stable operation of a subsequent ion exchange device is ensured; the water is deeply hardened by an ion exchange device, the hardness of the effluent is close to zero, and the inorganic scaling risk of a subsequent membrane concentration crystallization system is eliminated; and blowing off carbon dioxide in the carbon remover 8 to remove the alkalinity in water so as to reduce the calcium carbonate scaling risk of a subsequent evaporative crystallization device. Through the treatment of the high-salinity wastewater by the parts, the treated water can directly enter the evaporative crystallization device, the produced fresh water is recycled, the zero discharge of the wastewater is realized, and the environmental protection standard required by the state is reached.
Preferably, the fresh water of the concentration and reduction device 10 enters a fresh water tank 11 of the concentration and reduction device, the outlet water of the fresh water tank 11 of the concentration and reduction device is subjected to reverse osmosis desalination on the fresh water side of the concentration and reduction device, and the concentrated water enters the conditioning water tank 1 and is recycled for treatment again; and the produced water enters a reverse osmosis water production tank, and the outlet water of the reverse osmosis water production tank is used for replenishing circulating water.
Furthermore, the inlet of the tempering water tank 1 is communicated with the high-salinity wastewater of the power plant, the effluent of the wastewater collection tank and the reverse osmosis concentrated water on the fresh water side of the concentration and reduction device, namely the reverse osmosis concentrated water is used as a mixing tank, so that the water from each source is mixed to realize the homogenization of water quantity and water quality, and the subsequent treatment is facilitated.
Specifically, the silicon removal unit 2 is used for adding a medicament to precipitate silicon in water; precipitating most of the silicon in the water in a silicon removal unit 2;
this concentrated decrement system of strong brine still includes: a dewatering device; the dehydration device is used for dehydrating chemical sludge generated by silicon removal.
In this example, pH adjustment back tank 3 was used to adjust pH to 4 by adding hydrochloric acid.
Preferably, the oxidation unit 4 comprises: a Fenton oxidation unit for removing COD in the water and precipitating insoluble substances.
Further, the filtration pretreatment apparatus includes: a multimedia filter 5 and ultrafiltration 6. Removing suspended matters and colloid in the water and reducing the turbidity of the water through a multi-medium filter 5; the water produced by filtration is further intercepted by ultrafiltration 6, so that suspended matters, colloid, bacteria and turbidity are reduced, organic pollutants are partially removed, the SDI value can be effectively reduced, resin pollution is prevented, and the stable operation of a follow-up weak acid cation bed is ensured.
In this embodiment, the ion exchange device includes: weak acid cation bed 7. The water produced by ultrafiltration 6 is deeply hardened by removing hardness through a weak acid cation bed 7, the hardness of the effluent is close to zero, the inorganic scaling risk of a subsequent membrane concentration crystallization system is eliminated, the pH value of the weak acid water produced is adjusted to 4 by hydrochloric acid and then enters a decarbonizer 8, carbon dioxide is blown off in the decarbonizer 8, the alkalinity of the water is removed to reduce the calcium carbonate scaling risk of the subsequent evaporation crystallization system, and the produced water enters a weak acid cation bed water production tank (namely the ion exchange device water production tank 9).
Specifically, the silicon removal unit 2, the ph adjusting tank 3, the oxidation unit 4 and the filtering pretreatment device are sequentially connected to obtain ideal water quality.
The concentrated brine decrement system that the embodiment of this invention provides still includes: an evaporative crystallization device;
the concentrated water buffer tank of the concentration and decrement device 10 is connected with the evaporative crystallization device.
The present solution is further described below with reference to specific embodiments:
the high-salinity wastewater of the power plant is firstly discharged from a conditioning water tank and a wastewater collecting pool, the concentrated water is mixed with reverse osmosis concentrated water on the fresh water side of a concentration and reduction device, the mixture is lifted to a desiliconization unit by a lifting pump after being homogenized by water quantity and water quality, most of silicon in the water is precipitated in the desiliconization unit, the discharged water is lifted to a Fenton oxidation unit by the lifting pump after the pH value of the discharged water is adjusted to 4 by hydrochloric acid, most of COD in the water is removed and insoluble substances are precipitated in the Fenton oxidation unit, suspended substances and colloid in the water are removed through a multi-medium filter, the turbidity in the water is reduced, the filtration produced water is further intercepted by ultrafiltration to reduce tiny particles, the suspended substances, the colloid, bacteria and turbidity, organic pollutants are partially removed, the SDI value can be effectively reduced, resin pollution is prevented, the stable operation of a subsequent weak acid cation bed is ensured, the produced water is collected to an ultrafiltration produced water tank, and the ultrafiltration produced water is deeply demineralized through the weak acid cation bed, the hardness of the effluent is close to zero, the inorganic scaling risk of a subsequent membrane concentration crystallization system is eliminated, the weak cation produced water enters a decarbonizer after the pH value is adjusted to 4 by hydrochloric acid, carbon dioxide is blown off in the decarbonizer, the alkalinity in the water is removed to reduce the calcium carbonate scaling risk of the subsequent evaporation crystallization system, and the produced water enters a weak acid cation bed water production tank.
The outlet water of the weak acid cation bed water tank is lifted to a concentration and reduction device by a pump, concentrated water enters a concentrated water buffer water tank of the concentration and reduction device after being concentrated by the concentration and reduction device, and fresh water enters a fresh water tank of the concentration and reduction device.
The outlet water of the fresh water tank of the concentration and reduction device is lifted to the fresh water side of the concentration and reduction device by a pump for reverse osmosis desalination, the concentrated water enters the conditioning water tank, the produced water enters the reverse osmosis water production tank, and the outlet water of the reverse osmosis water production tank is used for replenishing the circulating water.
The outlet water of the concentrated water buffer tank of the concentration and decrement device is lifted to an evaporative crystallization salt production system by a pump for evaporative crystallization.
And dehydrating the chemical sludge generated by silicon removal.
In conclusion, the embodiment of the invention discloses a concentrated brine concentration and decrement system, high-salinity wastewater generated by a power plant is introduced into a concentration and decrement system, the high-salinity wastewater is treated by an ion exchange, oxidation and filtration pretreatment device and a concentration and decrement device, and the treated water can directly enter an evaporative crystallization system. The system is applied to treating the high-salinity wastewater of the power plant, the produced fresh water is recycled, the zero discharge of the wastewater is realized, and the environmental protection standard required by the state is reached.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a strong brine is concentrated decrement system which characterized in that includes: the system comprises a tempering water tank (1), a silicon removal unit (2), a ph callback pool (3), an oxidation unit (4), a filtering pretreatment device, an ion exchange device, a carbon remover (8) and a concentration reduction device (10);
the silicon removal unit (2), the ph adjusting tank (3), the oxidation unit (4) and the filtering pretreatment device are connected between the conditioning water tank (1) and the ion exchange device, the carbon remover (8), the ion exchange device production water tank (9) and the concentration and decrement device (10) are sequentially connected.
2. The concentrated brine concentration and reduction system according to claim 1, wherein a fresh water outlet of the concentration and reduction device (10) is connected with a fresh water tank (11) of the concentration and reduction device, the outlet water of the fresh water tank (11) of the concentration and reduction device is subjected to reverse osmosis desalination on the fresh water side of the concentration and reduction device, and a concentrated water outlet is connected with the conditioning water tank (1).
3. The concentrated brine concentration and reduction system according to claim 2, wherein the inlet of the conditioning water tank (1) is communicated with the high salinity wastewater of the power plant, the effluent of the wastewater collection tank and the reverse osmosis concentrated water on the fresh water side of the concentration and reduction device.
4. The concentrated brine decrement system of claim 1, wherein the silicon removal unit (2) is used for adding a medicament to precipitate silicon in water;
concentrated decrement system of strong brine still includes: a dewatering device; the dehydration device is used for dehydrating the chemical sludge generated by silicon removal.
5. The concentrated brine decrement system of claim 1, wherein the pH adjusting tank (3) is used for adjusting the pH to 4 by adding hydrochloric acid.
6. The concentrated brine decrement system of claim 1, wherein the oxidation unit (4) comprises: and the Fenton oxidation unit is used for removing COD in the water.
7. The concentrated brine decrement system of claim 1, wherein the filtration pretreatment device comprises: a multi-media filter (5) and ultrafiltration (6).
8. The concentrated brine decrement system of claim 1, wherein the ion exchange unit comprises: weak acid bed (7).
9. The concentrated brine concentration and decrement system according to claim 1, wherein the silicon removal unit (2), the ph adjusting tank (3), the oxidation unit (4) and the filtration pretreatment device are connected in sequence.
10. The concentrated brine decrement system of claim 1, further comprising: an evaporative crystallization device;
and a concentrated water buffer water tank of the concentration and decrement device (10) is connected with the evaporative crystallization device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210133879.1A CN114275961A (en) | 2022-02-14 | 2022-02-14 | Concentrated decrement system of strong brine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210133879.1A CN114275961A (en) | 2022-02-14 | 2022-02-14 | Concentrated decrement system of strong brine |
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| CN202210133879.1A Pending CN114275961A (en) | 2022-02-14 | 2022-02-14 | Concentrated decrement system of strong brine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604939A (en) * | 2022-04-11 | 2022-06-10 | 倍杰特集团股份有限公司 | Water treatment system and method based on high-strength immersed membrane |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150315055A1 (en) * | 2012-12-07 | 2015-11-05 | Aquatech International Corporation | Water Treatment Process |
| CN108751523A (en) * | 2018-08-02 | 2018-11-06 | 北京沃特尔水技术股份有限公司 | High-salt wastewater is except firmly except silicon and concentration method and system |
| CN112794472A (en) * | 2020-12-25 | 2021-05-14 | 深圳德蓝生态环境有限公司 | Concentration system and concentration method for high-salinity wastewater |
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2022
- 2022-02-14 CN CN202210133879.1A patent/CN114275961A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150315055A1 (en) * | 2012-12-07 | 2015-11-05 | Aquatech International Corporation | Water Treatment Process |
| CN108751523A (en) * | 2018-08-02 | 2018-11-06 | 北京沃特尔水技术股份有限公司 | High-salt wastewater is except firmly except silicon and concentration method and system |
| CN112794472A (en) * | 2020-12-25 | 2021-05-14 | 深圳德蓝生态环境有限公司 | Concentration system and concentration method for high-salinity wastewater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604939A (en) * | 2022-04-11 | 2022-06-10 | 倍杰特集团股份有限公司 | Water treatment system and method based on high-strength immersed membrane |
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