CN112250224A - Water purification treatment device and water purification treatment method for desalinated brackish water - Google Patents
Water purification treatment device and water purification treatment method for desalinated brackish water Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 376
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 225
- 238000001728 nano-filtration Methods 0.000 claims abstract description 171
- 238000004519 manufacturing process Methods 0.000 claims abstract description 115
- 238000001514 detection method Methods 0.000 claims abstract description 80
- 238000000746 purification Methods 0.000 claims abstract description 35
- 238000005345 coagulation Methods 0.000 claims abstract description 32
- 230000015271 coagulation Effects 0.000 claims abstract description 32
- 239000003814 drug Substances 0.000 claims abstract description 31
- 238000004140 cleaning Methods 0.000 claims abstract description 23
- 239000000126 substance Substances 0.000 claims abstract description 21
- 238000011001 backwashing Methods 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 26
- 238000001556 precipitation Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 23
- 239000002351 wastewater Substances 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 239000000701 coagulant Substances 0.000 claims description 4
- 239000008213 purified water Substances 0.000 claims description 3
- 238000010612 desalination reaction Methods 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 238000004062 sedimentation Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 12
- 238000011010 flushing procedure Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000001223 reverse osmosis Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000011033 desalting Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000000909 electrodialysis Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 239000002366 mineral element Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- -1 suspended matters Substances 0.000 description 1
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- 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
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
本发明公开了一种淡化苦咸水净水处理装置，所述原水箱、混凝单元、沉淀单元、超滤单元、超滤产水箱、纳滤单元和总产水箱通过管路依次连接；所述超滤单元与所述超滤产水箱连接的管路上还设置有所述第一导电率检测装置；所述第二导电率检测装置置于所述总产水箱与所述纳滤单元之间的管道上；所述第三导电率检测装置置于总产水箱中；所述超越管线连接所述超滤产水箱和总产水箱，所述超滤药箱通过超滤化学清洗管线与所述超滤单元连接，所述纳滤药箱通过纳滤化学清洗管线与所述纳滤单元连接。通过提供所述净水处理水路和调节水路，将两条水路设置在一起充分保障用水水质的情况下减少了处理能耗，降低了生产成本，提升了资源利用率。
The invention discloses a desalination brackish water purification treatment device. The raw water tank, the coagulation unit, the sedimentation unit, the ultrafiltration unit, the ultrafiltration water production tank, the nanofiltration unit and the total production water tank are connected in sequence through pipelines; The first conductivity detection device is also provided on the pipeline connecting the ultrafiltration unit and the ultrafiltration water production tank; the second conductivity detection device is placed between the total production water tank and the nanofiltration unit The third conductivity detection device is placed in the total production water tank; the overrunning pipeline connects the ultrafiltration production water tank and the total production water tank, and the ultrafiltration medicine box is connected with the ultrafiltration chemical cleaning pipeline through the ultrafiltration chemical cleaning pipeline. The ultrafiltration unit is connected, and the nanofiltration medicine box is connected with the nanofiltration unit through the nanofiltration chemical cleaning pipeline. By providing the water purification treatment waterway and the adjustment waterway, the two waterways are arranged together to reduce the treatment energy consumption, reduce the production cost, and improve the resource utilization rate under the condition that the water quality of the water is fully guaranteed.
Description
Technical Field
The invention relates to the field of brackish water treatment, in particular to a water purification treatment device for desalinated brackish water and a water purification treatment method thereof.
Background
With the rapid development of social economy, China is facing to the problem of more and more serious water resource shortage, according to statistics, the per-capita freshwater resource of China is only 28% of the average level of the world, and only ranks 121 in the world, so that the per-capita freshwater resource is one of the most poor countries of the per-capita water resource of 13 people in the world. In global water balance, the brackish water content accounts for more than half of the storage amount of underground water resources, and the brackish water resources in China are mainly distributed in northwest regions and southeast coastal regions. Brackish water generally refers to poor water resources which cannot be directly used as raw water or only can be used in a small range due to high mineralization degree, and the direct use of the water resources can cause great harm to industrial and agricultural production and human health. However, achieving efficient exploitation and utilization of such unconventionally important potential water resources is an important approach to alleviate the shortage of freshwater supply in our country. The conventional water treatment process mainly comprising coagulation, precipitation, filtration and disinfection mainly removes pollutants such as suspended matters, colloids, pathogenic microorganisms and the like in raw water, has no effect on desalting brackish water, and mainly comprises electrodialysis, reverse osmosis and nanofiltration in the existing mature desalting process. The electrodialysis method has no economic advantage for desalting seawater and high-salinity saline water because the energy consumption is in positive correlation with the salt content of raw water, the treatment performance of the electrodialysis method is greatly influenced by the environment, and the quality of produced water is unstable; although the reverse osmosis method has good treatment effect and the desalination rate can reach more than 99 percent, the reverse osmosis method has higher driving pressure and over-strong interception performance, so that the operation energy consumption and the membrane pollution degree are correspondingly higher, and the minerals necessary for human bodies are completely removed while the salt is removed, so that the produced water is not suitable for being used as drinking water. The intercepted molecular weight of the nanofiltration technology which has emerged in recent years is between ultrafiltration and reverse osmosis, the operating pressure is greatly reduced compared with reverse osmosis, the energy consumption is saved by about 50%, meanwhile, the nanofiltration membrane has a certain selective interception function, mineral elements required by a human body can be reserved, however, the nanofiltration technology is the same as other membrane separation technologies, the problem of membrane pollution needs to be faced, and therefore a novel, more reasonable, more effective and more economic bitter salt water desalination combined process technology needs to be urgently sought.
Disclosure of Invention
Therefore, the water purification device and the water purification method for desalinating brackish water are needed to be provided, so that the real-time monitoring, feedback and adjustment of the condition of the desalination process of brackish water are realized, and the automatic and intelligent operation is realized.
In order to achieve the above object, the present application provides a desalination brackish water purification apparatus, comprising: a purified water treatment waterway and a regulating waterway;
the water purification treatment waterway includes: the system comprises a raw water tank, a coagulation unit, a precipitation unit, an ultrafiltration water production tank, a nanofiltration unit and a total production water tank; the raw water tank is connected with the coagulation unit through a pipeline, the coagulation unit is connected with the precipitation unit through a pipeline, the precipitation unit is in management connection with the ultrafiltration unit, the ultrafiltration unit is connected with the ultrafiltration production water tank through a pipeline, the ultrafiltration production water tank is connected with the nanofiltration unit through a pipeline, and the nanofiltration unit is connected with the total production water tank through a pipeline;
the regulating waterway includes: the device comprises an ultrafiltration medicine chest, a nanofiltration medicine chest, an override pipeline, a first conductivity detection device, a second conductivity detection device and a third conductivity detection device; the pipeline connecting the ultrafiltration unit and the ultrafiltration water production tank is also provided with the first conductivity detection device, and the first conductivity detection device is used for detecting the conductivity at the outlet of the ultrafiltration unit; the second conductivity detection device is arranged on a pipeline between the total production water tank and the nanofiltration unit and is used for detecting the conductivity at the outlet of the nanofiltration unit; the third conductivity detection device is arranged in the total production water tank and is used for detecting the conductivity in the total production water tank; the surmounting pipeline is connected with the ultrafiltration water production tank and the total water production tank, the ultrafiltration medicine box is connected with the ultrafiltration unit through an ultrafiltration chemical cleaning pipeline, and the nanofiltration medicine box is connected with the nanofiltration unit through a nanofiltration chemical cleaning pipeline.
Further, the regulating waterway further comprises: an ultrafiltration backwashing waterway and a nanofiltration backwashing waterway;
the ultrafiltration backwashing water path is also provided with a first flowmeter, a first valve and a first pump, and the nanofiltration backwashing water path is also provided with a second flowmeter, a second valve and a second pump; the starting point of the ultrafiltration backwashing water channel is connected with the ultrafiltration water production tank, and the end point of the ultrafiltration backwashing water channel is connected with the ultrafiltration unit; the starting point of the nanofiltration backwashing waterway is connected with the total water production tank, and the end point of the nanofiltration backwashing waterway is connected with the nanofiltration unit.
Further, still include: a third pump, a fourth pump, a fifth pump, a sixth pump, a seventh pump, an eighth pump, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, and an eighth valve;
the third pump and the third valve are arranged on a pipeline connecting the raw water tank and the coagulation unit; the fourth pump and the fourth valve are arranged on a pipeline connecting the precipitation unit and the ultrafiltration unit; the fifth pump and the fifth valve are arranged on a pipeline for connecting the ultrafiltration water production tank with the nanofiltration unit; a sixth pump and a sixth valve are arranged on the overrunning pipeline; a seventh pump and a seventh valve are arranged at the outlet end of the ultrafiltration medicine chest; and an eighth pump and an eighth valve are arranged at the outlet end of the nanofiltration medicine chest.
The system further comprises a third flow meter, a fourth flow meter, a fifth flow meter, a sixth flow meter, a seventh flow meter, an eighth flow meter and a ninth flow meter, wherein the third flow meter is arranged on the overrunning pipeline; the fourth flowmeter is arranged on the water inlet end of the ultrafiltration unit; the fifth flowmeter is arranged on the water outlet end of the ultrafiltration unit; the sixth flowmeter is arranged on the water inlet end of the nanofiltration unit; the seventh flowmeter is arranged on the water outlet end of the nanofiltration unit; the eighth flow meter is arranged on the water outlet end of the ultrafiltration medicine box; and the ninth flowmeter is arranged at the water outlet end of the nanofiltration medicine chest.
Further, the regulating waterway further comprises: a PLC control system; the PLC control system is electrically connected with the first conductivity detection device, the second conductivity detection device, the third conductivity detection device, the first pump, the second pump, the third pump, the fourth pump, the fifth pump, the sixth pump, the seventh pump, the eighth pump, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the first flowmeter, the second flowmeter, the third flowmeter, the fourth flowmeter, the fifth flowmeter, the sixth flowmeter and the seventh flowmeter.
Further, the water purification treatment water route still includes: an ultrafiltration wastewater tank and a nanofiltration concentrated water tank; the ultrafiltration wastewater tank is connected with the ultrafiltration unit through a pipeline and is used for receiving wastewater generated by the ultrafiltration unit; the nanofiltration concentrated water tank is connected with the nanofiltration unit through a pipeline and is used for receiving concentrated water generated by the nanofiltration unit.
Further, still include: the stirring devices are multiple, and one stirring device is arranged on each of the coagulation unit, the ultrafiltration medical kit and the nanofiltration medical kit;
the stirring device includes: a stirring end and a power end; the stirring end is connected with the power end, and the power end is used for providing power for the stirring end.
The application also provides a water purification treatment method for desalinated brackish water, which is applied to any one embodiment of the water purification treatment device for desalinated brackish water and comprises the following steps:
the PLC control system opens a third pump and a third valve, raw water is transmitted to the coagulation unit from the raw water tank through the third pump and the third valve, and the raw water is dissolved with a coagulant in the coagulation unit and then enters the precipitation unit;
the PLC control system opens a fourth pump and a fourth valve, raw water precipitated by the precipitation unit is transmitted to the ultrafiltration unit through the fourth pump and the fourth valve, and ultrafiltration product water treated by the ultrafiltration unit enters the ultrafiltration product water tank through the first conductivity detection device;
the first conductivity detection device detects whether the conductivity of the ultrafiltration produced water is lower than a first preset value: if the conductivity of the ultrafiltration produced water is lower than a first preset value, a sixth pump and a sixth valve are driven to be opened, and the ultrafiltration produced water enters a total production water tank through an overrunning pipeline, the sixth pump and the sixth valve after passing through the ultrafiltration produced water tank; if the conductivity of the ultrafiltration produced water is higher than a first preset value, a fifth pump and a fifth valve are driven to be opened, and the ultrafiltration produced water enters a nanofiltration unit through the fifth pump and the fifth valve to be subjected to nanofiltration treatment;
and detecting whether the conductivity of the nanofiltration produced water is lower than a second preset value by a second conductivity detection device positioned at an outlet of the nanofiltration unit: and if the nanofiltration water production is lower than a second preset value, a sixth pump and a sixth valve are driven to be opened, and the ultrafiltration water production in the ultrafiltration water production tank enters the total production water tank through an overrunning pipeline.
Further, the method also comprises the following steps:
when the conductivity of the ultrafiltration produced water or the nanofiltration produced water detected by the first conductivity detection device, the second conductivity detection device and the third conductivity detection device is higher than a third preset value, the third pump, the fourth pump, the fifth pump, the sixth pump, the seventh pump and the eighth pump are driven to stop working, and the first valve, the first pump, the second valve and the second pump on the ultrafiltration backwashing water channel and the nanofiltration backwashing water channel are opened for backwashing.
Further, the method also comprises the following steps:
and when the conductivity of the ultrafiltration water production or the nanofiltration water production is continuously higher than a fourth preset value, driving a seventh pump, a seventh valve, an eighth pump and an eighth valve to be opened.
Be different from prior art, above-mentioned technical scheme through set up the regulation water route on former water tank, the unit of coagulating, precipitation unit, ultrafiltration product water tank, nanofiltration unit and the total production water tank that connect gradually, reaches to adjust and realizes real-time supervision, feedback and the regulation to the desalination process condition of brackish water. When the added overrunning pipeline does not need further nanofiltration, the ultrafiltration water production meeting the requirements is directly led into the total water production tank; and meanwhile, the ultrafiltration unit and the nanofiltration unit are automatically cleaned by matching the ultrafiltration medicine chest and the nanofiltration medicine chest. Through providing the water purification treatment water route and regulation water route have reduced the processing energy consumption with two water route settings under the condition of fully ensuring water quality of water together, have reduced manufacturing cost, have promoted resource utilization, have promoted water purification efficiency simultaneously.
Drawings
FIG. 1 is a schematic diagram of the water purification device for desalinating brackish water;
FIG. 2 is a structural view of the coagulation unit;
FIG. 3 is a schematic diagram of the ultrafiltration unit;
fig. 4 is a structural view of the nanofiltration unit.
Description of reference numerals:
10. a raw water tank; 11. a coagulation unit; 12. a precipitation unit; 13. an ultrafiltration unit; 14. an ultrafiltration water production tank; 15. a nanofiltration unit; 16. a total production water tank; 17. an ultrafiltration wastewater tank; 18. a nanofiltration concentrated water tank;
110. a stirring device; 130. an ultrafiltration membrane module; 150. a nanofiltration membrane module;
20. a first ultrafiltration kit; 21. a nanofiltration medical kit; 22. an override line; 23. a first conductivity detection device; 24. a second conductivity detection device; 25. a third conductivity detection device; 26. chemically cleaning the pipeline by ultrafiltration; 27. nano-filtering and chemically cleaning the pipeline; 28. an ultrafiltration backwashing water path; 29. a nanofiltration backwash waterway;
30. a pump; 40. a valve; 50. a flow meter.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 to 4, the present embodiment provides a desalinated brackish water purifying apparatus, including: a purified water treatment waterway and a regulating waterway; the water purification treatment waterway includes: the system comprises a raw water tank 10, a coagulation unit 11, a precipitation unit 12, an ultrafiltration unit 13, an ultrafiltration product water tank 14, a nanofiltration unit 15 and a total product water tank 16; the raw water tank 10 is connected with the coagulation unit 11 through a pipeline, the coagulation unit 11 is connected with the precipitation unit 12 through a pipeline, the precipitation unit 12 is in management connection with the ultrafiltration unit 13, the ultrafiltration unit 13 is connected with the ultrafiltration water production tank 14 through a pipeline, the ultrafiltration water production tank 14 is connected with the nanofiltration unit 15 through a pipeline, and the nanofiltration unit 15 is connected with the total water production tank 16 through a pipeline; the regulating waterway includes: an ultrafiltration kit 20, a nanofiltration kit 21, an override line 22, a first conductivity detection device 23, a second conductivity detection device 24, and a third conductivity detection device 25; the pipeline connecting the ultrafiltration unit 13 and the ultrafiltration water production tank 14 is also provided with the first conductivity detection device, and the first conductivity detection device is used for detecting the conductivity at the outlet of the ultrafiltration unit 13; the second conductivity detection device 24 is disposed on the pipeline between the total production water tank 16 and the nanofiltration unit 15, and is used for detecting the conductivity at the outlet of the nanofiltration unit 15; the third conductivity detection device 25 is disposed in the total production water tank 16 and is used for detecting the conductivity in the total production water tank 16; the over-run pipe 22 connects the ultrafiltration product water tank 14 and the total product water tank 16, the ultrafiltration medicine tank 20 is connected with the ultrafiltration unit 13 through an ultrafiltration chemical cleaning pipe 26, and the ultrafiltration unit is cleaned by flowing the liquid medicine into the ultrafiltration unit 13 through the ultrafiltration chemical cleaning pipe 26. The nanofiltration medicine chest 21 is connected with the nanofiltration unit 15 through a nanofiltration chemical cleaning pipeline 27, and the nanofiltration unit to be cleaned is that the liquid medicine flows into the nanofiltration unit 15 through the nanofiltration chemical cleaning pipeline 27. The ultrafiltration unit 13 includes an ultrafiltration membrane module 130; the nanofiltration unit 15 includes a nanofiltration membrane assembly 150.
It should be noted that, in this application, along the direction of intaking former water tank 10, thoughtlessly congeal unit 11, precipitation unit 12, ultrafiltration unit 13, ultrafiltration product water tank 14, receive filtration unit 15 and total production water tank 16 and connect gradually through the pipeline, adjust the water route and for setting up the supplementary water route on the water purification treatment water route, two water route designs make this combined technology can fully adapt to the water source change that uses the land, promote the treatment effeciency, reduce and handle the energy consumption. Specifically, the starting point of the overrunning pipeline 22 is connected with the ultrafiltration water production tank 14, and the end point is connected with the nanofiltration water production tank pipeline; a first conductivity detection device is also arranged at the outlet end of the ultrafiltration unit 13; the second conductivity detection device 24 is disposed on the pipeline between the total production water tank 16 and the nanofiltration unit 15, and is used for detecting the conductivity at the outlet of the nanofiltration unit 15; the third conductivity detection device 25 is disposed in the total production water tank 16 for detecting the conductivity in the total production water tank 16. Wherein, the water purification treatment waterway is used for treating the brackish water. Firstly, when the quality of the brackish water is changed and the salinity is not high, namely the conductivity is lower than a first preset value, the first preset value can be 1500 mu S/cm, the situation is monitored by a first conductivity detection device at the outlet end of the ultrafiltration produced water and fed back to a PLC control system, and the PLC control system sends out an instruction that nanofiltration is not performed any more, so that the ultrafiltration produced water is directly introduced into the total water production tank 16; and secondly, when the salt content of the nanofiltration produced water is lower than a second preset value, the second preset value is 200 mu S/cm, the nanofiltration produced water is monitored by a second conductive detection device at the outlet end of the nanofiltration produced water and fed back to the PLC control system, and the control system sends an instruction of directly introducing the ultrafiltration produced water into the total water production tank 16, so that the mineral content in the total water production is improved, and the conductivity of the total water production is adjusted to be about 500 mu S/cm.
The two-waterway design enables the combined process to be fully and intelligently adapted to the water source change of a use place, the treatment efficiency is improved, and the treatment energy consumption is reduced. Different from the prior art, according to the technical scheme, the raw water tank 10, the coagulation unit 11, the precipitation unit 12, the ultrafiltration unit 13, the ultrafiltration product water tank 14, the nanofiltration unit 15 and the total product water tank 16 which are connected in sequence are provided with the adjusting water paths, so that the purpose of adjusting and realizing real-time monitoring, feedback and adjustment of the desalination process condition of the brackish water is achieved. The added overrunning pipeline 22 directly guides the ultrafiltration water production meeting the requirements into the total water production tank 16 when the ultrafiltration water production does not need further nanofiltration; meanwhile, the ultrafiltration unit 13 and the nanofiltration unit 15 are automatically cleaned through the matching of the ultrafiltration medicine box 20 and the nanofiltration medicine box 21. Through providing the water purification treatment water route and regulation water route have reduced the processing energy consumption with two water route settings under the condition of fully ensuring water quality of water together, have reduced manufacturing cost, have promoted resource utilization, have promoted water purification efficiency simultaneously.
The specific treatment process comprises the following steps: temporarily storing the produced water treated by the ultrafiltration unit 13 in an ultrafiltration water production tank 14, detecting the conductivity of the produced water at an outlet of the ultrafiltration unit 13 by using a first conductivity detection device, and directly introducing the produced water into a total water production tank 16 for direct use when the conductivity of the produced water is lower than 1500 mu S/cm; when the conductivity of the produced water is higher than 1500 muS/cm, the system automatically starts the nanofiltration unit 15 to carry out nanofiltration treatment, the conductivity of the nanofiltration produced water is generally within 300 muS/cm, when the conductivity of the produced water is lower than 200 muS/cm, the overtaking pipeline 22 is started, the produced water temporarily stored in the ultrafiltration water production tank 14 bypasses the nanofiltration unit 15 and is directly introduced into the total water production tank 16 to adjust the content of substances in the total water production, and the total water production conductivity is detected by a third conductivity detection device in the total water production tank 16 and is fed back to the control system, so that the overtaking introduction amount is controlled.
In order to realize the efficient operation of the desalination brackish water purification treatment device, the desalination brackish water purification treatment device further comprises a third pump, a fourth pump, a fifth pump, a sixth pump, a seventh pump, an eighth pump, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve and an eighth valve; the third pump and the third valve are arranged on a pipeline connecting the raw water tank and the coagulation unit; the fourth pump and the fourth valve are arranged on a pipeline connecting the precipitation unit and the ultrafiltration unit; the fifth pump and the fifth valve are arranged on a pipeline for connecting the ultrafiltration water production tank with the nanofiltration unit; a sixth pump and a sixth valve are arranged on the overrunning pipeline; a seventh pump and a seventh valve are arranged at the outlet end of the ultrafiltration medicine chest; and an eighth pump and an eighth valve are arranged at the outlet end of the nanofiltration medicine chest. It should be noted that the first pump, the second pump, the third pump, the fourth pump, the fifth pump, the sixth pump, the seventh pump and the eighth pump are the same pump, and because the position of each pump is different, the first pump, the second pump and the like are adopted to distinguish the pumps at different positions; similarly, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve are the same valve, and because the positions of the valves are different, the valves at different positions are distinguished by the first valve, the second valve and the like. It should be further noted that the pump 30 includes a first pump, a second pump, etc., and the valve 40 includes a first valve, a second valve, etc. The pump 30 and valve 40 arrangement can increase the rate of flow of water through the apparatus and thus increase the efficiency of operation of the apparatus. Of course, in some implementations, the regulating waterway further includes: a PLC control system; the PLC control system is electrically connected to the first conductivity detection device 23, the second conductivity detection device 24, the third conductivity detection device 25, the first pump, the second pump, the third pump, the fourth pump, the fifth pump, the sixth pump, the seventh pump, the eighth pump, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, and the eighth valve. In the operation process, the operation condition is monitored in real time through equipment such as the flowmeter 50, the sensor, the valve 40, the first conductivity detection device 23, the second conductivity detection device 24 and the third conductivity detection device 25, monitoring data are fed back to a PLC control system of each unit in time, and the system controls the operation of control devices such as the valve 40 and the pump 30 according to preset limit values.
The first flowmeter, the second flowmeter, the third flowmeter, the fourth flowmeter, the fifth flowmeter, the sixth flowmeter, the seventh flowmeter, the eighth flowmeter, and the ninth flowmeter are the same flowmeter 50, and the first pump, the second pump, and the like are used to distinguish the flowmeters 50 at different positions, because the positions of the flowmeters are different;
referring to fig. 1, in some embodiments, the regulating waterway further includes: an ultrafiltration backwashing water path 28 and a nanofiltration backwashing water path 29; the ultrafiltration backwashing water channel 28 is also provided with a first flowmeter, a first valve and a first pump, and the nanofiltration backwashing water channel 29 is also provided with a second flowmeter, a second valve and a second pump; the starting point of the ultrafiltration back-flushing waterway 28 is connected with the ultrafiltration water production tank 14, and the end point of the ultrafiltration back-flushing waterway 28 is connected with the ultrafiltration unit 13; the starting point of the nanofiltration backwashing water channel 29 is connected with the total water production tank 16, and the end point of the nanofiltration backwashing water channel 29 is connected with the nanofiltration unit 15. It should be noted that the starting point of the ultrafiltration backwashing water channel 28 is the ultrafiltration water production tank 14, and the end point is the ultrafiltration unit 13; the starting point of the ultrafiltration chemical cleaning waterway is an ultrafiltration cleaning medical kit, and the end point is an ultrafiltration unit 13; the starting point of the nanofiltration backwashing water channel 29 is a total water production tank 16, and the end point is a nanofiltration unit 15; the starting point of the nanofiltration chemical cleaning waterway is the nanofiltration cleaning chemical tank and the end point is the nanofiltration unit 15; the ultrafiltration and nanofiltration wastewater outlets are respectively connected with an ultrafiltration wastewater tank 17 and a nanofiltration concentrated water tank 18 through wastewater pipes. The flowmeter 50, the first conductivity detection device, the second conductivity detection device and the third conductivity detection device are used for recording the flow rate, the quality of inlet water and the quality of produced water. The first conductivity detection device and the second conductivity detection device are connected with controllers of the ultrafiltration system and the nanofiltration system, data are fed back in real time, when the conductivity of ultrafiltration or nanofiltration produced water is too high, namely the conductivity of the ultrafiltration produced water or the nanofiltration produced water detected by the first conductivity detection device 23, the second conductivity detection device 24 and the third conductivity detection device 25 is higher than a third preset value, the PLC control system can automatically control the pumps 30 to stop running and give an alarm to remind back flushing, and the first pump, the second pump, the first valve and the second valve on the ultrafiltration back flushing waterway 28 and the nanofiltration back flushing waterway 29 are started to carry out back flushing. When the conductivity of the inlet water is very low, the PLC control system can automatically control the nanofiltration unit 15 to stop working, and the water pump 30 of the surpassing pipeline 22 is started, and the ultrafiltration water is introduced into the total production water tank 16. When the conductivity of the ultrafiltration produced water is always high, namely the conductivity of the ultrafiltration produced water is continuously higher than the fourth preset value, the irreversible membrane pollution of the ultrafiltration membrane is serious, and the controller gives an alarm to remind that chemical cleaning is needed. Meanwhile, the PLC control system controls the automatic operation of the ultrafiltration medical kit 20 and the nanofiltration medical kit 21.
Referring to fig. 2, in order to enhance the dissolution of the coagulant and the drug, the coagulation efficiency is improved, and the precipitation removal effect of the pollutants and suspended matters is enhanced. In certain embodiments, further comprising: the stirring devices are multiple, and one stirring device is arranged on each of the coagulation unit, the ultrafiltration medical kit and the nanofiltration medical kit; the stirring device includes: a stirring end and a power end; the stirring end is connected with the power end, and the power end is used for providing power for the stirring end. Specifically, the stirring end is a stirring rod horizontally arranged, and the power end is a motor; the stirring rod arranged in the coagulation unit 11, the ultrafiltration medical kit 20 or the nanofiltration medical kit 21 is connected with a motor positioned outside the coagulation unit 11, the ultrafiltration medical kit 20 or the nanofiltration medical kit 21 through a rotating shaft, and the motor drives the rotating shaft to drive the stirring rod to rotate. Of course, in some embodiments, the stirring end may also be a magnet, and the power end is a magnetic rotating disc; when the stirring device 110 operates, the magnets are placed in the coagulation unit 11, the ultrafiltration medical kit 20 or the nanofiltration medical kit 21, a magnetic turntable is placed below the coagulation unit 11, the ultrafiltration medical kit 20 or the nanofiltration medical kit 21, and after the turntable is started, the internal magnets are driven to rotate, so that the stirring operation is performed; it should be noted that the magnetic turntable may include: the turntable comprises a turntable body and magnetic blocks, wherein the magnetic blocks are arranged on the turntable body.
In some embodiments, there is also provided a method for purifying desalinated brackish water, applied to the device, comprising the steps of:
the PLC control system opens a third pump and a third valve, raw water is transmitted to the coagulation unit from the raw water tank through the third pump and the third valve, and the raw water is dissolved with a coagulant in the coagulation unit and then enters the precipitation unit;
the PLC control system opens a fourth pump and a fourth valve, raw water precipitated by the precipitation unit is transmitted to the ultrafiltration unit through the fourth pump and the fourth valve, and ultrafiltration product water treated by the ultrafiltration unit enters the ultrafiltration product water tank through the first conductivity detection device;
the first conductivity detection device detects whether the conductivity of the ultrafiltration produced water is lower than a first preset value: if the conductivity of the ultrafiltration produced water is lower than a first preset value, a sixth pump and a sixth valve are driven to be opened, and the ultrafiltration produced water enters a total production water tank through an overrunning pipeline, the sixth pump and the sixth valve after passing through the ultrafiltration produced water tank; if the conductivity of the ultrafiltration produced water is higher than a first preset value, a fifth pump and a fifth valve are driven to be opened, and the ultrafiltration produced water enters a nanofiltration unit through the fifth pump and the fifth valve to be subjected to nanofiltration treatment;
and detecting whether the conductivity of the nanofiltration produced water is lower than a second preset value by a second conductivity detection device positioned at an outlet of the nanofiltration unit: and if the nanofiltration water production is lower than a second preset value, a sixth pump and a sixth valve are driven to be opened, and the ultrafiltration water production in the ultrafiltration water production tank enters the total production water tank through an overrunning pipeline.
Further comprising the steps of:
when the conductivity of the ultrafiltration produced water or the nanofiltration produced water detected by the first conductivity detection device, the second conductivity detection device and the third conductivity detection device is higher than a third preset value, the third pump, the fourth pump, the fifth pump, the sixth pump, the seventh pump and the eighth pump are driven to stop working, and the first valve, the first pump, the second valve and the second pump on the ultrafiltration backwashing water channel and the nanofiltration backwashing water channel are opened for backwashing.
Further comprising the steps of:
and when the conductivity of the ultrafiltration water production or the nanofiltration water production is continuously higher than a fourth preset value, driving a seventh pump, a seventh valve, an eighth pump and an eighth valve to be opened.
The water purification treatment waterway is used for treating the brackish water. Firstly, when the quality of the brackish water is changed and the salinity is not high, namely the conductivity is lower than a first preset value, the first preset value can be 1500 mu S/cm, the situation is monitored by a first conductivity detection device at the outlet end of the ultrafiltration produced water and fed back to a PLC control system, and the PLC control system sends out an instruction that nanofiltration is not performed any more, so that the ultrafiltration produced water is directly introduced into the total water production tank 16; and secondly, when the salt content of the nanofiltration produced water is lower than a second preset value, the second preset value is 200 mu S/cm, the nanofiltration produced water is monitored by a second conductive detection device at the outlet end of the nanofiltration produced water and fed back to the PLC control system, and the control system sends an instruction of directly introducing the ultrafiltration produced water into the total water production tank 16, so that the mineral content in the total water production is improved, and the conductivity of the total water production is adjusted to be about 500 mu S/cm. The two-waterway design enables the combined process to be fully and intelligently adapted to the water source change of a use place, the treatment efficiency is improved, and the treatment energy consumption is reduced. According to the technical scheme, the raw water tank 10, the coagulation unit 11, the precipitation unit 12, the ultrafiltration unit 13, the ultrafiltration product water tank 14, the nanofiltration unit 15 and the total product water tank 16 which are connected in sequence are provided with the adjusting water paths, so that the purpose of adjusting and realizing real-time monitoring, feedback and adjustment of the desalination process condition of the brackish water is achieved. The added overrunning pipeline 22 directly guides the ultrafiltration water production meeting the requirements into the total water production tank 16 when the ultrafiltration water production does not need further nanofiltration; meanwhile, the ultrafiltration unit 13 and the nanofiltration unit 15 are automatically cleaned through the matching of the ultrafiltration medicine box 20 and the nanofiltration medicine box 21. Through providing the water purification treatment water route and regulation water route have reduced the processing energy consumption with two water route settings under the condition of fully ensuring water quality of water together, have reduced manufacturing cost, have promoted resource utilization, have promoted water purification efficiency simultaneously.
The specific treatment process comprises the following steps: temporarily storing the produced water treated by the ultrafiltration unit 13 in an ultrafiltration water production tank 14, detecting the conductivity of the produced water at an outlet of the ultrafiltration unit 13 by adopting a first conductivity detection device, and directly introducing the produced water into a total water production tank 16 for direct use when the conductivity of the produced water is lower than 1500 mu S/cm; when the conductivity of the produced water is higher than 1500 muS/cm, the system automatically starts the nanofiltration unit 15 to carry out nanofiltration treatment, the conductivity of the nanofiltration produced water is generally within 300 muS/cm, when the conductivity of the produced water is lower than 200 muS/cm, the overtaking pipeline 22 is started, the produced water temporarily stored in the ultrafiltration water production tank 14 bypasses the nanofiltration unit 15 and is directly introduced into the total water production tank 16 to adjust the content of substances in the total water production, and the conductivity meter in the total water production tank 16 detects the conductivity of the total water production and feeds the total water conductivity back to the control system, so that the overtaking introduction amount is controlled.
The starting point of the ultrafiltration backwashing water channel 28 is an ultrafiltration water production tank 14, and the end point is an ultrafiltration unit 13; the starting point of the ultrafiltration chemical cleaning waterway is an ultrafiltration cleaning medical kit, and the end point is an ultrafiltration unit 13; the starting point of the nanofiltration backwashing water channel 29 is a total water production tank 16, and the end point is a nanofiltration unit 15; the starting point of the nanofiltration chemical cleaning waterway is the nanofiltration cleaning chemical tank and the end point is the nanofiltration unit 15; the ultrafiltration and nanofiltration wastewater outlets are respectively connected with an ultrafiltration wastewater tank 17 and a nanofiltration concentrated water tank 18 through wastewater pipes. Flow meters 50 and conductivity meters are arranged before the water inlet ends and after the water outlet ends of the ultrafiltration unit 13 and the nanofiltration unit 15 and are used for recording the flow rate and the quality of inlet water and produced water. The first conductivity detection device and the second conductivity detection device are connected with controllers of the ultrafiltration system and the nanofiltration system, data are fed back in real time, and when the conductivity of ultrafiltration or nanofiltration produced water is too high, namely the conductivity of the ultrafiltration produced water or the nanofiltration produced water detected by the first conductivity detection device 23, the second conductivity detection device 24 and the third conductivity detection device 25 is higher than a third preset value, the PLC control system can automatically control the third pump, the fourth pump, the fifth pump, the sixth pump, the seventh pump and the eighth pump to stop running and give an alarm to remind back flushing, and open the back flushing first valve, the first pump, the second valve and the second pump on the ultrafiltration back flushing waterway 28 and the nanofiltration back flushing waterway 29 to carry out back flushing. When the conductivity of the inlet water is very low, the PLC control system can automatically control the nanofiltration unit 15 to stop working, and the water pump 30 of the surpassing pipeline 22 is started, and the ultrafiltration water is introduced into the total production water tank 16. When the conductivity of the ultrafiltration produced water is always high, namely the conductivity of the ultrafiltration produced water is continuously higher than the fourth preset value, the irreversible membrane pollution of the ultrafiltration membrane is serious, and the controller gives an alarm to remind that chemical cleaning is needed. Meanwhile, the PLC control system controls the automatic operation of the ultrafiltration medical kit 20 and the nanofiltration medical kit 21.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.
Claims (10)
1. A water purification treatment device for desalinated brackish water is characterized by comprising: a purified water treatment waterway and a regulating waterway;
the water purification treatment waterway includes: the system comprises a raw water tank, a coagulation unit, a precipitation unit, an ultrafiltration water production tank, a nanofiltration unit and a total production water tank; the raw water tank is connected with the coagulation unit through a pipeline, the coagulation unit is connected with the precipitation unit through a pipeline, the precipitation unit is in management connection with the ultrafiltration unit, the ultrafiltration unit is connected with the ultrafiltration production water tank through a pipeline, the ultrafiltration production water tank is connected with the nanofiltration unit through a pipeline, and the nanofiltration unit is connected with the total production water tank through a pipeline;
the regulating waterway includes: the device comprises an ultrafiltration medicine chest, a nanofiltration medicine chest, an override pipeline, a first conductivity detection device, a second conductivity detection device and a third conductivity detection device; the pipeline connecting the ultrafiltration unit and the ultrafiltration water production tank is also provided with the first conductivity detection device, and the first conductivity detection device is used for detecting the conductivity at the outlet of the ultrafiltration unit; the second conductivity detection device is arranged on a pipeline between the total production water tank and the nanofiltration unit and is used for detecting the conductivity at the outlet of the nanofiltration unit; the third conductivity detection device is arranged in the total production water tank and is used for detecting the conductivity in the total production water tank; the surmounting pipeline is connected with the ultrafiltration water production tank and the total water production tank, the ultrafiltration medicine box is connected with the ultrafiltration unit through an ultrafiltration chemical cleaning pipeline, and the nanofiltration medicine box is connected with the nanofiltration unit through a nanofiltration chemical cleaning pipeline.
2. The desalinated brackish water purifying apparatus according to claim 1, wherein the regulating water circuit further comprises: an ultrafiltration backwashing waterway and a nanofiltration backwashing waterway;
the ultrafiltration backwashing water path is also provided with a first flowmeter, a first valve and a first pump, and the nanofiltration backwashing water path is also provided with a second flowmeter, a second valve and a second pump; the starting point of the ultrafiltration backwashing water channel is connected with the ultrafiltration water production tank, and the end point of the ultrafiltration backwashing water channel is connected with the ultrafiltration unit; the starting point of the nanofiltration backwashing waterway is connected with the total water production tank, and the end point of the nanofiltration backwashing waterway is connected with the nanofiltration unit.
3. The water purification treatment device for desalinated brackish water according to claim 2, further comprising: a third pump, a fourth pump, a fifth pump, a sixth pump, a seventh pump, an eighth pump, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, and an eighth valve;
the third pump and the third valve are arranged on a pipeline connecting the raw water tank and the coagulation unit; the fourth pump and the fourth valve are arranged on a pipeline connecting the precipitation unit and the ultrafiltration unit; the fifth pump and the fifth valve are arranged on a pipeline for connecting the ultrafiltration water production tank with the nanofiltration unit; a sixth pump and a sixth valve are arranged on the overrunning pipeline; a seventh pump and a seventh valve are arranged at the outlet end of the ultrafiltration medicine chest; and an eighth pump and an eighth valve are arranged at the outlet end of the nanofiltration medicine chest.
4. The water purification device for desalinating brackish water according to claim 3, further comprising a third flow meter, a fourth flow meter, a fifth flow meter, a sixth flow meter, a seventh flow meter, an eighth flow meter and a ninth flow meter, wherein the third flow meter is disposed on the override pipeline; the fourth flowmeter is arranged on the water inlet end of the ultrafiltration unit; the fifth flowmeter is arranged on the water outlet end of the ultrafiltration unit; the sixth flowmeter is arranged on the water inlet end of the nanofiltration unit; the seventh flowmeter is arranged on the water outlet end of the nanofiltration unit; the eighth flow meter is arranged on the water outlet end of the ultrafiltration medicine box; and the ninth flowmeter is arranged at the water outlet end of the nanofiltration medicine chest.
5. The desalinated brackish water purifying apparatus according to claim 4, wherein the regulating water circuit further comprises: a PLC control system; the PLC control system is electrically connected with the first conductivity detection device, the second conductivity detection device, the third conductivity detection device, the first pump, the second pump, the third pump, the fourth pump, the fifth pump, the sixth pump, the seventh pump, the eighth pump, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the first flowmeter, the second flowmeter, the third flowmeter, the fourth flowmeter, the fifth flowmeter, the sixth flowmeter and the seventh flowmeter.
6. The water purification device for desalinating brackish water according to claim 1, wherein the water purification treatment circuit further comprises: an ultrafiltration wastewater tank and a nanofiltration concentrated water tank; the ultrafiltration wastewater tank is connected with the ultrafiltration unit through a pipeline and is used for receiving wastewater generated by the ultrafiltration unit; the nanofiltration concentrated water tank is connected with the nanofiltration unit through a pipeline and is used for receiving concentrated water generated by the nanofiltration unit.
7. The water purification treatment device for desalinated brackish water according to claim 1, further comprising: the stirring devices are multiple, and one stirring device is arranged on each of the coagulation unit, the ultrafiltration medical kit and the nanofiltration medical kit;
the stirring device includes: a stirring end and a power end; the stirring end is connected with the power end, and the power end is used for providing power for the stirring end.
8. A method for purifying desalinated brackish water, which is applied to the desalinated brackish water purifying apparatus according to claim 5, comprises the steps of:
the PLC control system opens a third pump and a third valve, raw water is transmitted to the coagulation unit from the raw water tank through the third pump and the third valve, and the raw water is dissolved with a coagulant in the coagulation unit and then enters the precipitation unit;
the PLC control system opens a fourth pump and a fourth valve, raw water precipitated by the precipitation unit is transmitted to the ultrafiltration unit through the fourth pump and the fourth valve, and ultrafiltration product water treated by the ultrafiltration unit enters the ultrafiltration product water tank through the first conductivity detection device;
the first conductivity detection device detects whether the conductivity of the ultrafiltration produced water is lower than a first preset value: if the conductivity of the ultrafiltration produced water is lower than a first preset value, a sixth pump and a sixth valve are driven to be opened, and the ultrafiltration produced water enters a total production water tank through an overrunning pipeline, the sixth pump and the sixth valve after passing through the ultrafiltration produced water tank; if the conductivity of the ultrafiltration produced water is higher than a first preset value, a fifth pump and a fifth valve are driven to be opened, and the ultrafiltration produced water enters a nanofiltration unit through the fifth pump and the fifth valve to be subjected to nanofiltration treatment;
and detecting whether the conductivity of the nanofiltration produced water is lower than a second preset value by a second conductivity detection device positioned at an outlet of the nanofiltration unit: and if the nanofiltration water production is lower than a second preset value, a sixth pump and a sixth valve are driven to be opened, and the ultrafiltration water production in the ultrafiltration water production tank enters the total production water tank through an overrunning pipeline.
9. The method for water purification treatment of desalinated brackish water according to claim 8, further comprising the steps of:
when the conductivity of the ultrafiltration produced water or the nanofiltration produced water detected by the first conductivity detection device, the second conductivity detection device and the third conductivity detection device is higher than a third preset value, the third pump, the fourth pump, the fifth pump, the sixth pump, the seventh pump and the eighth pump are driven to stop working, and the first valve, the first pump, the second valve and the second pump on the ultrafiltration backwashing water channel and the nanofiltration backwashing water channel are opened for backwashing.
10. The method for water purification treatment of desalinated brackish water according to claim 8 or 9, further comprising the steps of:
and when the conductivity of the ultrafiltration water production or the nanofiltration water production is continuously higher than a fourth preset value, driving a seventh pump, a seventh valve, an eighth pump and an eighth valve to be opened.
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| CN202011249556.6A CN112250224A (en) | 2020-11-10 | 2020-11-10 | Water purification treatment device and water purification treatment method for desalinated brackish water |
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| CN1994904A (en) * | 2006-11-24 | 2007-07-11 | 陈益棠 | Sea water nanofiltration desalination method and device |
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| WO2014187296A1 (en) * | 2013-05-19 | 2014-11-27 | 波鹰(厦门)科技有限公司 | Regenerating and recycling apparatus and method for advanced treatment papermaking wastewater |
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| CN205347040U (en) * | 2016-01-22 | 2016-06-29 | 苏州他山石环保科技有限公司 | High -efficient ultrafiltration water purification equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1994904A (en) * | 2006-11-24 | 2007-07-11 | 陈益棠 | Sea water nanofiltration desalination method and device |
| WO2014187296A1 (en) * | 2013-05-19 | 2014-11-27 | 波鹰(厦门)科技有限公司 | Regenerating and recycling apparatus and method for advanced treatment papermaking wastewater |
| CN103936202A (en) * | 2014-05-04 | 2014-07-23 | 河南师范大学 | Brackish water desalination method and brackish water desalination device |
| CN104556481A (en) * | 2014-12-24 | 2015-04-29 | 北京桑德环境工程有限公司 | Treatment system and method for preparing high-hardness underground water into domestic drinking water |
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