CN107601744B - High-salt wastewater treatment system and method thereof - Google Patents
High-salt wastewater treatment system and method thereof Download PDFInfo
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002351 wastewater Substances 0.000 claims abstract description 45
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000000746 purification Methods 0.000 claims abstract description 26
- 238000004062 sedimentation Methods 0.000 claims abstract description 20
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 9
- 231100000719 pollutant Toxicity 0.000 claims abstract description 9
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 8
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- 239000012528 membrane Substances 0.000 claims description 22
- 239000010802 sludge Substances 0.000 claims description 22
- 150000003839 salts Chemical class 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 239000006004 Quartz sand Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- JYIBXUUINYLWLR-UHFFFAOYSA-N aluminum;calcium;potassium;silicon;sodium;trihydrate Chemical compound O.O.O.[Na].[Al].[Si].[K].[Ca] JYIBXUUINYLWLR-UHFFFAOYSA-N 0.000 claims description 4
- 238000005341 cation exchange Methods 0.000 claims description 4
- 239000002734 clay mineral Substances 0.000 claims description 4
- 229910001603 clinoptilolite Inorganic materials 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052622 kaolinite Inorganic materials 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 239000012267 brine Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 238000002513 implantation Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 238000005054 agglomeration Methods 0.000 claims 1
- 230000002776 aggregation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000704 physical effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005288 electromagnetic effect Effects 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 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 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a high-salt wastewater treatment system and a treatment method thereof, wherein the system comprises a wastewater treatment tank, a high-efficiency sedimentation tank, a composite electromagnetic water treatment device, an ultrafiltration purification device, a reverse osmosis filtration device and a low-temperature evaporation device which are connected in sequence; the composite electromagnetic water treatment device consists of a plasma processor and a magnetic processor, wherein the inlet of the plasma processor is connected with the outlet of the efficient sedimentation tank, the outlet of the plasma processor is connected with the inlet of the magnetic processor, and the outlet of the magnetic processor is connected with the inlet of the filter purifying device. The high-salinity wastewater treatment system can effectively reduce the concentration of pollutants in wastewater and improve the physical properties of salinity, thereby achieving the effects of high-efficiency treatment and salinity recovery of high-salinity wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a high-salt wastewater treatment system and a method thereof.
Background
In the social and economic development and urbanization process of China, the shortage of water resources is becoming one of the main factors restricting the sustainable development strategy of China. In recent years, with the continuous increase of industrial scale in China, the industrial water consumption is increased. Meanwhile, the amount of generated wastewater is rapidly increased, and great challenges are brought to the current wastewater treatment and recycling technology. Industrial wastewater, if discharged directly, will cause serious pollution to surrounding soil and water environment. After the wastewater is qualified after treatment, if the wastewater is not recycled, water resource waste is caused, and water resource shortage is aggravated.
High-salt wastewater refers to wastewater containing organic matter and at least 3.5% (mass concentration) of Total Dissolved Solids (TDS). The source of the high-salt wastewater is wide, firstly, a large amount of wastewater is discharged in various industrial production processes such as chemical industry, pharmacy, petroleum, papermaking, dairy processing, food canning and the like, and the water contains a large amount of high-concentration organic pollutants and is accompanied with a large amount of ions such as calcium, sodium, chloride, sulfate radical and the like; secondly, in order to fully utilize water resources, many coastal cities directly utilize seawater as industrial production water or cooling water, and although the part of sewage does not contain a large amount of toxic substances, the sewage has large water quantity and high salt content and is difficult to treat.
For high-salt wastewater, most of dilution and discharge methods are adopted due to lack of technical and economic feasibility and reliability. The method can not really reduce the total discharge amount of pollutants, and causes the waste of fresh water, especially the discharge of salt-containing wastewater, and the mineralization of fresh water resources and the alkalization of soil are caused. Compared with the desalting technology level of 'zero emission' or 'zero-emission' of foreign high-salt wastewater, the method has a large gap in China. Therefore, how to develop an economic and effective high-salt wastewater desalination treatment process technology, promote the recycling of the high-salt wastewater, and solve the bottleneck problem of water resource recycling.
Disclosure of Invention
The invention aims to overcome the defects of the background technology, and provides a high-salt wastewater treatment system with good separation effect and high recovery rate, and a treatment method by using the high-salt wastewater treatment system.
In order to achieve the aim, the high-salt wastewater treatment system comprises a wastewater treatment tank, a high-efficiency sedimentation tank, a composite electromagnetic water treatment device, an ultrafiltration purification device, a reverse osmosis filtration device and a low-temperature evaporation device which are connected in sequence;
the composite electromagnetic water treatment device consists of a plasma processor and a magnetic processor, wherein the inlet of the plasma processor is connected with the outlet of the wastewater treatment tank, the outlet of the plasma processor is connected with the inlet of the magnetic processor, and the outlet of the magnetic processor is connected with the inlet of the ultrafiltration purification device.
In the technical scheme, the device also comprises a sludge treatment device, and sludge outlets of the efficient sedimentation tank and the ultrafiltration purification device are respectively connected with a sludge inlet of the sludge treatment device.
In the technical scheme, the waste water treatment tank is filled with the clean magic cube treating agent.
In the above technical scheme, ultrafiltration purification device comprises a plurality of milipore filter subassembly, every milipore filter subassembly includes central filter tube, central filter tube's outer wall hoop covers has the milipore filter rete, it has the net magic cube treating agent to fill between central filter tube outer wall and the milipore filter rete inner wall.
Further, the clean magic cube treating agent comprises the following components in parts by weight: clinoptilolite 65-75 parts; 10-15 parts of kaolinite; 5-10 parts of clay mineral with high cation exchange capacity; 1-2 parts of quartz sand; volcanic ash 6-8 parts; 2-3 parts of medical stone.
The invention also provides a method for treating the high-salt wastewater by using the high-salt wastewater treatment system, which comprises the following steps:
1) The high-salt wastewater firstly enters a wastewater treatment tank, the wastewater is pretreated by a clean magic cube treating agent in the wastewater treatment tank, and the pretreated wastewater enters a high-efficiency sedimentation tank for solid-liquid separation;
2) The supernatant separated by the high-efficiency sedimentation tank enters a composite electromagnetic water treatment device, and the plasma processor and the magnetic processor are utilized to carry out physical and chemical treatment on the wastewater;
3) The wastewater discharged from the composite electromagnetic water treatment device enters an ultrafiltration purification device, is filtered and purified by a clean magic cube treating agent and an ultrafiltration ceramic membrane layer in the ultrafiltration purification device, and enters a reverse osmosis filtration device after the wastewater containing only salt is obtained;
4) Directly discharging purified water obtained by the wastewater in the reverse osmosis filter device under the action of a reverse osmosis membrane, and enabling the generated concentrated brine to enter a low-temperature evaporation device, wherein the salt obtained after treatment is recycled for the second time;
5) And (3) the sludge generated by the high-efficiency sedimentation tank and the ultrafiltration purification device enters a sludge treatment device and is treated to obtain the dried sludge.
Compared with the prior art, the invention has the following advantages:
firstly, the high-salt wastewater treatment system is provided with a wastewater treatment tank, so that the efficiency of water supply treatment can be improved; the device is also designed with a composite electromagnetic water treatment device, and the composite electromagnetic water treatment device is formed by connecting a plasma processor and a magnetic processor in series, so that the wastewater can be subjected to physical and chemical treatment, the concentration of pollutants in the wastewater is effectively reduced, the physical property of salt is improved, and the membrane separation efficiency is improved.
Secondly, the waste water treatment tanks of the high-salt waste water treatment system are filled with a clean magic cube treating agent (BEST treating agent), and the clean magic cube treating agent consists of the following components in parts by weight: clinoptilolite 65-75 parts; 10-15 parts of kaolinite; 5-10 parts of clay mineral with high cation exchange capacity; 1-2 parts of quartz sand; volcanic ash 6-8 parts; 2-3 parts of medical stone. The treating agent is porous and has charged surface, and can remove pollutant in water by adsorption, coagulation, precipitation, biological implantation degradation and other principles, and has physical and biological characteristics. By utilizing the porous structure and the charge property of the pure magic cube treating agent, the pure magic cube treating agent is added into the wastewater, and the concentration of pollutants in the wastewater is efficiently reduced by combining the electromagnetic effect generated by the composite electromagnetic water treatment device, so that the process flow can be shortened and simplified, and the effects of efficient treatment and salt recovery of the high-salt wastewater are achieved.
The ultrafiltration purification device is composed of a plurality of ultrafiltration membrane components, the clean magic cube treating agent is attached to the surface of the ultrafiltration ceramic membrane layer through a special process to form a front filter layer, the performance of the membrane can be obviously improved, the pollution and blockage of the ultrafiltration ceramic membrane are avoided, the service life of the ultrafiltration ceramic membrane is greatly prolonged, the water quality of effluent of the ultrafiltration purification unit is improved, and the separation performance is enhanced.
Drawings
FIG. 1 is a schematic diagram of a high salt wastewater treatment system;
FIG. 2 is a schematic view of a part of the ultrafiltration purification apparatus of FIG. 1;
in the figure: 1-wastewater treatment tank, 2-high-efficiency sedimentation tank, 3-composite electromagnetic water treatment device, 4-ultrafiltration purification device, 4.1-central filter tube, 4.2-ultrafiltration ceramic membrane layer, 5-reverse osmosis filtration device, 6-low temperature evaporation device, 7-sludge treatment device, 8-plasma processor and 9-magnetic processor.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to examples, but they are not to be construed as limiting the invention. While at the same time becoming clearer and more readily understood by way of illustration of the advantages of the present invention.
The high-salt wastewater treatment system of the invention as shown in the figure 1 comprises a wastewater treatment tank 1, a high-efficiency sedimentation tank 2, a composite electromagnetic water treatment device 3, an ultrafiltration purification device 4, a reverse osmosis filtration device 5 and a low-temperature evaporation device 6 which are connected in sequence; the composite electromagnetic water treatment device 3 consists of a plasma processor 8 and a magnetic processor 9, wherein the inlet of the plasma processor 8 is connected with the outlet of the high-efficiency sedimentation tank 2, the outlet of the plasma processor 8 is connected with the inlet of the magnetic processor 9, and the outlet of the magnetic processor 9 is connected with the inlet of the ultrafiltration purification device 4. The device also comprises a sludge treatment device 7, and sludge outlets of the high-efficiency sedimentation tank 2 and the ultrafiltration purification device 4 are respectively connected with a sludge inlet of the sludge treatment device 7. The waste water treatment tank 1 is filled with a clean magic cube treating agent. The clean magic cube treating agent consists of the following components in parts by weight: clinoptilolite 65-75 parts; 10-15 parts of kaolinite; 5-10 parts of clay mineral with high cation exchange capacity; 1-2 parts of quartz sand; volcanic ash 6-8 parts; 2-3 parts of medical stone. The treating agent is porous and has charged surface, and can remove pollutant in water by adsorption, coagulation, precipitation, biological implantation degradation and other principles, and has physical and biological characteristics. By utilizing the porous structure and the charge property of the pure magic cube treating agent, the pure magic cube treating agent is added into the wastewater, and the concentration of pollutants in the wastewater is efficiently reduced by combining the electromagnetic effect generated by the composite electromagnetic water treatment device, so that the process flow can be shortened and simplified, and the effects of efficient treatment and salt recovery of the high-salt wastewater are achieved.
As shown in fig. 2, the ultrafiltration purification device 4 is composed of a plurality of ultrafiltration membrane modules, each ultrafiltration membrane module comprises a central filter tube 4.1, an ultrafiltration ceramic membrane layer 4.2 is circumferentially covered on the outer wall of the central filter tube 4.1, and a clean magic cube treating agent is filled between the outer wall of the central filter tube 4.1 and the inner wall of the ultrafiltration ceramic membrane layer 4.2. The outer wall of the central filter tube 4.1 is provided with a plurality of filter holes in a circumferential direction.
The method of the high-salt wastewater treatment system comprises the following steps: the high-salt wastewater firstly enters a wastewater treatment tank 1, a net magic cube treating agent is added in the wastewater treatment tank 1 to pretreat the wastewater, the pretreated wastewater enters a high-efficiency sedimentation tank 2 to carry out solid-liquid separation, the supernatant fluid of the high-efficiency sedimentation tank 2 enters a composite electromagnetic water treatment device 3, and the wastewater is subjected to physical and chemical treatment by a plasma processor 8 and a magnetic processor 9, so that the concentration of pollutants in the wastewater is effectively reduced, the physical properties of salt are improved, and the membrane separation efficiency is improved. The wastewater discharged from the composite electromagnetic water treatment device enters an ultrafiltration purification device 4, the wastewater containing only salt is obtained through filtration and purification of a clean magic cube treating agent and an ultrafiltration ceramic membrane and then enters a reverse osmosis filtration device 5, the purified water obtained after the wastewater is subjected to the action of a reverse osmosis membrane is directly discharged, and the produced concentrated brine enters a low-temperature evaporation device 6 and is subjected to secondary recovery and utilization of the salt obtained after the treatment. And the sludge generated by the high-efficiency sedimentation tank 2 and the ultrafiltration purification device 4 enters a sludge treatment device and is treated to obtain dried sludge.
Other not described in detail are known in the art.
Claims (1)
1. A method for treatment with a high salt wastewater treatment system, comprising the steps of:
1) The high-salt wastewater firstly enters a wastewater treatment tank (1), the wastewater is pretreated by a clean magic cube treating agent in the wastewater treatment tank (1), and the pretreated wastewater enters a high-efficiency sedimentation tank (2) for solid-liquid separation;
2) Supernatant separated by the high-efficiency sedimentation tank (2) enters a composite electromagnetic water treatment device (3), and wastewater is subjected to physical and chemical treatment by using a plasma processor (8) and a magnetic processor (9);
3) The wastewater discharged from the composite electromagnetic water treatment device (3) enters an ultrafiltration purification device (4), and the wastewater which only contains salt is obtained by filtering and purifying the purified magic cube treating agent and the ultrafiltration ceramic membrane layer in the ultrafiltration purification device (4) and then enters a reverse osmosis filtration device (5);
4) Purified water obtained by the wastewater in the reverse osmosis filter device (5) under the action of a reverse osmosis membrane is directly discharged, and the generated concentrated brine enters the low-temperature evaporation device (6) and is subjected to secondary recovery and utilization of the salt obtained after treatment;
5) The sludge generated by the high-efficiency sedimentation tank (2) and the ultrafiltration purification device (4) enters a sludge treatment device (7) and is treated to obtain dried sludge;
the high-salinity wastewater treatment system comprises a wastewater treatment tank (1), a high-efficiency sedimentation tank (2), a composite electromagnetic water treatment device (3), an ultrafiltration purification device (4), a reverse osmosis filtration device (5) and a low-temperature evaporation device (6) which are connected in sequence;
the composite electromagnetic water treatment device (3) consists of a plasma processor (8) and a magnetic processor (9), wherein the inlet of the plasma processor (8) is connected with the outlet of the efficient sedimentation tank (2), the outlet of the plasma processor (8) is connected with the inlet of the magnetic processor (9), and the outlet of the magnetic processor (9) is connected with the inlet of the ultrafiltration purification device (4);
the high-salinity wastewater treatment system also comprises a sludge treatment device (7), wherein the sludge outlets of the high-efficiency sedimentation tank (2) and the ultrafiltration purification device (4) are respectively connected with the sludge inlet of the sludge treatment device (7);
the waste water treatment tank (1) is filled with a clean magic cube treating agent;
the ultrafiltration purification device (4) is composed of a plurality of ultrafiltration membrane components, each ultrafiltration membrane component comprises a central filter tube (4.1), an ultrafiltration ceramic membrane layer (4.2) is circumferentially covered on the outer wall of the central filter tube (4.1), and a clean magic cube treating agent is filled between the outer wall of the central filter tube (4.1) and the inner wall of the ultrafiltration ceramic membrane layer (4.2);
the clean magic cube treating agent consists of the following components in parts by weight: clinoptilolite 65-75 parts; 10-15 parts of kaolinite; 5-10 parts of clay mineral with high cation exchange capacity; 1-2 parts of quartz sand; volcanic ash 6-8 parts; 2-3 parts of medical stone;
the net magic cube treating agent is of a porous structure and has charged surface, and pollutants in water are removed through adsorption, agglomeration, precipitation and biological implantation degradation principles.
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| CN201711024712.7A CN107601744B (en) | 2017-10-27 | 2017-10-27 | High-salt wastewater treatment system and method thereof |
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| CN107601744B true CN107601744B (en) | 2024-02-06 |
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