CN113651463A - Short-flow feedwater treatment system and treatment process thereof - Google Patents
Short-flow feedwater treatment system and treatment process thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
- 238000001728 nano-filtration Methods 0.000 claims abstract description 97
- 239000012528 membrane Substances 0.000 claims abstract description 88
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000004062 sedimentation Methods 0.000 claims abstract description 53
- 230000001112 coagulating effect Effects 0.000 claims abstract description 41
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 24
- 238000005345 coagulation Methods 0.000 claims description 14
- 230000015271 coagulation Effects 0.000 claims description 14
- 239000000701 coagulant Substances 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 6
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 239000005416 organic matter Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000006385 ozonation reaction Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 238000009287 sand filtration Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001954 sterilising effect Effects 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
- C02F2303/04—Disinfection
Abstract
The invention discloses a short-flow feedwater treatment system and a treatment process thereof, wherein the treatment system comprises: the device comprises a pre-ozone contact tank (1), a coagulating sedimentation tank (2), a nanofiltration device (3) and a disinfection tank (4), wherein raw water in a raw water tank is lifted to the pre-ozone contact tank (1), is pumped into the coagulating sedimentation tank (2) after being oxidized by pre-ozone, is introduced into the nanofiltration device (3) after being treated by coagulating sedimentation, and is discharged after being treated by disinfection in the disinfection tank (4) after being filtered by a nanofiltration membrane.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a short-flow feedwater treatment system and a treatment process thereof.
Background
As shown in fig. 1, the conventional advanced treatment process of water supply mainly comprises raw water, pre-oxidation, coagulating sedimentation, sand filtration, ozone, biological activated carbon and disinfection, and in recent years, after the biological activated carbon filter is followed by ultrafiltration membrane treatment, ultraviolet oxidation and other treatment processes, the advanced treatment process of water supply is finer, the quality of purified water is further improved, and meanwhile, the advanced treatment process of water supply is more complicated and tedious.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a short-flow feedwater treatment system and a treatment process thereof, so as to achieve the purpose of simplifying the process flow of feedwater treatment while ensuring the quality of feedwater.
To achieve the above object, the present invention provides a short-flow feedwater treatment system, comprising: the system comprises a pre-ozone contact tank (1), a coagulating sedimentation tank (2), a nanofiltration device (3) and a disinfection tank (4), wherein raw water in a raw water tank is lifted to the pre-ozone contact tank (1), is pumped into the coagulating sedimentation tank (2) after being oxidized by pre-ozone, is introduced into the nanofiltration device (3) after being treated by coagulating sedimentation, and is filtered by a nanofiltration membrane to produce water which is then discharged after being disinfected in the disinfection tank (4)
Preferably, the ozone adding amount of the pre-ozone contact tank (1) is adjusted by an ozone generator according to the water quality condition of raw water and the water inlet quality requirement of a nanofiltration device, and the ozone adding amount is 0.6-1.4 mg/L.
Preferably, the coagulant added in the coagulating sedimentation tank (2) is aluminum sulfate.
Preferably, the adding amount of the coagulant added into the coagulating sedimentation tank (2) is controlled by a dosing pump according to the water outlet parameters of the coagulating sedimentation tank (2), and the adding amount is 35-45 mg/L.
Preferably, the nanofiltration device comprises a security filter, a booster pump and a membrane module, and the water produced by the coagulation sedimentation tank is pumped into the membrane module by the booster pump after being filtered by the security filter.
Preferably, the membrane component is a rolled nanofiltration membrane.
Preferably, the membrane module comprises a primary nanofiltration membrane and/or a secondary nanofiltration membrane.
Preferably, if the membrane component comprises a second-stage nanofiltration membrane, a control valve is arranged between the first-stage nanofiltration membrane and the second-stage nanofiltration membrane.
Preferably, the water inlet flow of the nanofiltration device is 4.9-5.1 m3The water inlet pressure is 4.2-4.5 bar.
In order to achieve the purpose, the invention also provides a short-flow water supply treatment process, which comprises the following steps:
step S1, lifting the raw water in the raw water pool to a pre-ozone contact pool by a pump, pumping the pre-ozone oxidized raw water into a coagulating sedimentation pool for coagulating sedimentation treatment, and sending the treated raw water into a nanofiltration device;
step S2, the nanofiltration device filters the water after the coagulating sedimentation treatment by a nanofiltration membrane, and then the produced water is pumped into a disinfection tank;
and step S3, discharging the water filtered by the nanofiltration membrane after the disinfection treatment in the disinfection tank.
Compared with the prior art, the short-flow water supply treatment system and the treatment process thereof have the advantages that pre-ozone and coagulating sedimentation are used as a pretreatment process, nanofiltration is used for replacing a sand filter and an ozone biological activated carbon filter in the conventional common advanced treatment process, the water supply treatment process is simplified, the high-efficiency removal of turbidity indexes and the partial removal of organic matter indexes are realized by adjusting the adding amount of the pre-ozone and a coagulant, the water quality requirement of inlet water of a nanofiltration membrane is met, and on the basis, the organic matter, partial ions and other indexes in water quality are further removed efficiently through the nanofiltration membrane, so that the aim of simplifying the water supply treatment process is fulfilled while the water quality of the feed water is ensured.
Drawings
FIG. 1 is a flow chart of a conventional feedwater deep treatment process;
FIG. 2 is a system architecture diagram of a short flow feedwater treatment system of the present invention;
fig. 3 is a schematic structural view of a nanofiltration device according to an embodiment of the present invention;
FIG. 4 is a flow chart of the steps of a short flow feedwater treatment process of the present invention;
FIG. 5 is a flow chart of a short-run feedwater treatment process in accordance with an embodiment of the present invention;
FIG. 6 is a graph showing the effect of turbidity of effluent at each process stage in the process flow of the present invention in example 1 of the present invention;
FIG. 7 shows the COD of the effluent of each process stage treated by the process of the present invention in example 2 of the present inventionMnEffect graphs;
FIG. 8 is a TOC effect chart of effluent from each process stage treated by the process flow of the present invention in example 3 of the present invention.
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
Nanofiltration is used as a novel membrane separation technology, the membrane aperture is generally 10 nm-1 nm and is between a reverse osmosis membrane and an ultrafiltration membrane, organic matters with the relative molecular weight of more than 200 and divalent or multivalent ions can be efficiently intercepted, the advantages of ultrafiltration and reverse osmosis are integrated, the selective removal of target objects can be realized under lower operating conditions, and the method has important application in the aspects of drinking water purification and organic matter removal. In the process of water supply treatment, due to the difference of the pore diameter and the charge of the nanofiltration membrane, impurities in water can be effectively intercepted by the nanofiltration membrane through various actions such as screening, steric hindrance, electrostatic repulsion and adsorption, so that the water quality after being filtered by the nanofiltration membrane is obviously superior to that of other water supply treatment processes.
FIG. 2 is a system architecture diagram of a short flow feedwater treatment system in accordance with the present invention. As shown in fig. 2, the present invention relates to a short-flow feed water treatment system, comprising: a pre-ozone contact tank 1, a coagulating sedimentation tank 2, a nanofiltration device 3 and a disinfection tank 4.
In the specific embodiment of the present invention, the pre-ozone contact tank 1 is cylindrical, raw water enters the pre-ozone contact tank 1 from the upper end, ozone gas enters the pre-ozone contact tank 1 from the lower end (gas enters the gas-water mixture from the lower end more uniformly), the gas-water mixture and the oxidation reaction are performed in the column, and then water flow enters the coagulating sedimentation tank 2 from the lower end through a pump. In the specific embodiment of the invention, the ozone adding amount of the pre-ozone contact tank 1 is regulated and controlled by the power of an ozone generator, namely, the ozone generator regulates the ozone adding amount according to the water quality conditions of raw water (comprising a plurality of parameters such as COD, turbidity, pH, ion content and the like) and the water inlet quality requirements of membrane devices of nanofiltration devices (the membrane requirements of different manufacturers are slightly different), and the pre-ozone adding amount is 0.6-1.4 mg/L.
The coagulating sedimentation tank 2 is used for pumping water subjected to pre-ozonation, coagulating sedimentation treatment and then introducing into the nanofiltration device 3, mechanical stirring is adopted for coagulating stirring in the coagulating sedimentation tank 2, aluminum sulfate is selected as a coagulant, the adding amount is 35-45 mg/L, the adding amount of the coagulant is controlled by a dosing pump, and the adding amount can be adjusted and controlled according to water quality parameters of effluent of the coagulating sedimentation tank.
And the nanofiltration device 3 is used for filtering the water subjected to the coagulating sedimentation treatment by using a nanofiltration membrane and pumping the produced water into the disinfection tank 4. In a specific embodiment of the present invention, as shown in fig. 3, the nanofiltration device 3 includes a cartridge filter, a booster pump and a membrane module, wherein the membrane module in the nanofiltration device 3 is a rolled nanofiltration membrane, the cartridge filter is disposed in front of the membrane module to protect the nanofiltration membrane module, the produced water in the coagulation sedimentation tank is pumped into the membrane module by the booster pump after passing through the cartridge filter, preferably, the nanofiltration device may adopt a one-stage or two-stage filtration mode, if the one-stage filtration mode is adopted, the membrane module is a one-stage nanofiltration membrane, the produced water in the coagulation sedimentation tank is pumped into the one-stage nanofiltration membrane by the booster pump after passing through the cartridge filter, and the produced water after the coagulation sedimentation treatment is pumped into the disinfection tank 4 after being filtered by the one-stage nanofiltration membrane; the nanofiltration device can also adopt a two-section type filtration mode, the membrane component comprises a first section of nanofiltration membrane and a second section of nanofiltration membrane, the water produced by the coagulation sedimentation tank passes through a security filter and then is pumped into the first section of nanofiltration membrane by a booster pump, and the total concentrated water of the first section of nanofiltration membrane can be introduced into the second section of nanofiltration membrane for further treatment; in the embodiment of the invention, the nanofiltration device can also be provided with a control valve between the first-stage nanofiltration membrane and the second-stage nanofiltration membrane, and during operation, the first-stage nanofiltration membrane can be selected according to the water quality or water yield requirement of the produced waterOr two-stage filtration, but the invention is not limited thereto. In the embodiment of the invention, the inlet water flow of the nanofiltration device 3 is 4.9-5.1 m3The water inlet pressure is 4.2-4.5 bar.
And the disinfection tank 4 is used for discharging the water filtered by the nanofiltration membrane after disinfection treatment.
FIG. 4 is a flow chart of the steps of a short run feedwater treatment process of the present invention. As shown in FIG. 4, the short-flow feed water treatment process of the present invention comprises the following steps:
and step S1, lifting the raw water in the raw water pool to a pre-ozone contact pool by a pump, pumping the pre-ozone oxidized raw water into a coagulation sedimentation pool for coagulation sedimentation treatment, and sending the treated raw water into a nanofiltration device.
In the invention, raw water in the pre-ozone contact tank enters from the upper end, ozone gas enters from the lower end, the pre-ozone dosage is 0.6-1.4 mg/L, and the raw water in the raw water tank is pumped into a coagulating sedimentation tank after being subjected to pre-ozone oxidation in the pre-ozone contact tank; and the coagulation stirring in the coagulation sedimentation tank adopts mechanical stirring, the coagulant adopts aluminum sulfate, and the adding amount is 35-45 mg/L.
Preferably, in step S1, the water quality requirement of the inlet water of the membrane receiving device is met by adjusting the adding amount of ozone and coagulant in the pre-ozone contact tank and the coagulation sedimentation tank.
In the specific embodiment of the invention, the ozone adding amount is controlled by the power of an ozone generator, the ozone generator adjusts the ozone adding amount according to the water quality condition of raw water (comprising a plurality of parameters such as COD, turbidity, pH, ion content and the like) and the water inlet quality requirements of a membrane device (different membrane requirements of different manufacturers are slightly different), the coagulant adding amount is controlled by a dosing pump, and the adding amount is adjusted and controlled according to the water quality parameters of the effluent of a coagulation sedimentation tank.
And step S2, filtering the water subjected to the coagulating sedimentation treatment by using a nanofiltration membrane, and pumping the produced water into a disinfection tank.
The nanofiltration device comprises a security filter, a booster pump and a membrane assembly, wherein the membrane assembly in the nanofiltration device is a roll-type nanofiltration membrane, the security filter is arranged in front of the membrane assembly to protect the nanofiltration membrane assembly, and the water produced by the coagulation sedimentation tank passes through the security filter and then is pressurizedThe pump pumps into the membrane module, preferably, the said nanofiltration apparatus can adopt the one-stage or two-stage filtration mode, if adopt the one-stage filtration mode, the said membrane module is a section of nanofiltration membrane, the coagulating sedimentation tank produces the water and pumps into a section of nanofiltration membrane with the booster pump after the cartridge filter, produce the water pump sterilizing the pool after filtering the water after coagulating sedimentation through a section of nanofiltration membrane; the nanofiltration device can also adopt a two-section type filtration mode, the membrane component comprises a first section of nanofiltration membrane and a second section of nanofiltration membrane, the water produced by the coagulation sedimentation tank passes through a security filter and then is pumped into the first section of nanofiltration membrane by a booster pump, and the total concentrated water of the first section of nanofiltration membrane can be introduced into the second section of nanofiltration membrane for further treatment; the nanofiltration device can also be provided with a control valve between the first-stage nanofiltration membrane and the second-stage nanofiltration membrane, and during operation, a one-stage or two-stage filtration mode can be selected according to the water quality or water yield requirement of the produced water, which is not limited by the invention. In the embodiment of the invention, the inlet water flow of the nanofiltration device is 4.9-5.1 m3The water inlet pressure is 4.2-4.5 bar.
And step S3, discharging the water filtered by the nanofiltration membrane after the disinfection treatment in the disinfection tank.
Experiments prove that in the invention, when the turbidity of raw water in the raw water pool is 26.5-38.7 NTU and CODMn2.96-3.08 mg/L, 3.34-3.72 mg/L of TOC, 99% of turbidity removal rate and COD after the short-process feedwater treatment process flow treatmentMnThe removal rate can reach more than 80 percent, and the removal rate of TOC can reach more than 75 percent.
Therefore, the invention takes pre-ozone and coagulating sedimentation as pretreatment processes, replaces a sand filtration and ozone biological activated carbon filter tank in the conventional advanced treatment process with nanofiltration, simplifies the water supply treatment process, realizes the high-efficiency removal of turbidity indexes and the partial removal of organic matter indexes by adjusting the adding amount of pre-ozone and coagulant, achieves the water quality requirement of inlet water of the nanofiltration membrane, and further efficiently removes the organic matter, partial ions and other indexes in the water quality through the nanofiltration membrane on the basis, thereby achieving the purpose of simplifying the water supply treatment process while ensuring the water quality of the water supply.
Example 1
As shown in fig. 5, in the present embodiment, the flow of a short-flow feedwater treatment process is as follows: the raw water in the raw water tank is lifted to a pre-ozone contact tank 1 by a pump, is pumped into a coagulating sedimentation tank 2 after being oxidized by pre-ozone, is introduced into a nanofiltration device 3 after being treated by coagulating sedimentation, and is discharged after being pumped into a disinfection tank 4 after being filtered by a nanofiltration membrane and being disinfected.
In this example, the turbidity of the effluent from each process stage after the treatment of the process flow of the present invention is shown in FIG. 6. The pre-ozonation has no obvious turbidity removal effect, the turbidity of the effluent after the coagulating sedimentation treatment is reduced to 0.78-1.18 NTU, the average removal rate can reach 95%, the turbidity is stabilized to 0.07-0.09 NTU after the nanofiltration treatment, and the turbidity of the effluent is at a lower level.
Example 2
In this example, the COD of the effluent from each process stage after the treatment of the process of the present inventionMnAs shown in fig. 7. COD after pre-ozonation treatmentMn2.4-2.56 mg/L, 1.84-1.88 mg/L after coagulating sedimentation treatment, 0.32-0.64 mg/L after nanofiltration treatment, and COD treated by the process of the inventionMnThe average removal rate of effluent can reach 84 percent, and the removal effect is higher.
Example 3
In the embodiment, the TOC of the effluent of each process stage after the treatment of the process flow is shown in FIG. 8, the TOC after the pre-ozonation treatment is 3.45-3.58 mg/L, the TOC after the coagulating sedimentation treatment is 2.69-2.85 mg/L, the TOC after the nanofiltration treatment is 0.3-0.83 mg/L, the average removal rate of the TOC effluent after the treatment of the process flow can reach 86%, and the removal effect and the COD are achievedMnIs more consistent and has higher organic matter removal efficiency.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (10)
1. A short-run feedwater treatment system comprising: the device comprises a pre-ozone contact tank (1), a coagulating sedimentation tank (2), a nanofiltration device (3) and a disinfection tank (4), wherein raw water in a raw water tank is lifted to the pre-ozone contact tank (1), is pumped into the coagulating sedimentation tank (2) after being oxidized by pre-ozone, is introduced into the nanofiltration device (3) after being treated by coagulating sedimentation, and is discharged after being treated by disinfection in the disinfection tank (4) after being filtered by a nanofiltration membrane.
2. A short-run feedwater treatment system as defined in claim 1 wherein: the ozone adding amount of the pre-ozone contact tank (1) is adjusted by an ozone generator according to the water quality condition of raw water and the water inlet quality requirement of a nanofiltration device, and the ozone adding amount is 0.6-1.4 mg/L.
3. A short-run feedwater treatment system as defined in claim 1 wherein: and the coagulant added in the coagulating sedimentation tank (2) is aluminum sulfate.
4. A short-run feedwater treatment system as defined in claim 3 wherein: the adding amount of the coagulant added in the coagulating sedimentation tank (2) is controlled by a dosing pump according to the water outlet parameters of the coagulating sedimentation tank (2), and the adding amount is 35-45 mg/L.
5. A short-run feedwater treatment system as defined in claim 1 wherein: the nanofiltration device comprises a security filter, a booster pump and a membrane component, and water produced by the coagulation sedimentation tank is pumped into the membrane component by the booster pump after being filtered by the security filter.
6. A short-run feedwater treatment system as defined in claim 5 wherein: the membrane component is a rolled nanofiltration membrane.
7. A short-run feedwater treatment system as defined in claim 6 wherein: the membrane component comprises a first-stage nanofiltration membrane and/or a second-stage nanofiltration membrane.
8. A short-run feedwater treatment system as defined in claim 7 wherein: if the membrane component comprises a second-stage nanofiltration membrane, a control valve is arranged between the first-stage nanofiltration membrane and the second-stage nanofiltration membrane.
9. A short-run feedwater treatment system as defined in claim 8 wherein: the water inlet flow of the nanofiltration device is 4.9-5.1 m3The water inlet pressure is 4.2-4.5 bar.
10. A short-flow feed water treatment process comprises the following steps:
step S1, lifting the raw water in the raw water pool to a pre-ozone contact pool by a pump, pumping the pre-ozone oxidized raw water into a coagulating sedimentation pool for coagulating sedimentation treatment, and sending the treated raw water into a nanofiltration device;
step S2, the nanofiltration device filters the water after the coagulating sedimentation treatment by a nanofiltration membrane, and then the produced water is pumped into a disinfection tank;
and step S3, discharging the water filtered by the nanofiltration membrane after the disinfection treatment in the disinfection tank.
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| CN202111080896.5A CN113651463A (en) | 2021-09-15 | 2021-09-15 | Short-flow feedwater treatment system and treatment process thereof |
| PCT/CN2021/128613 WO2023040017A1 (en) | 2021-09-15 | 2021-11-04 | Short-flow water supply treatment system and treatment process thereof |
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| CN202111080896.5A CN113651463A (en) | 2021-09-15 | 2021-09-15 | Short-flow feedwater treatment system and treatment process thereof |
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