CN117164141A - RO water production system - Google Patents
RO water production system Download PDFInfo
- Publication number
- CN117164141A CN117164141A CN202311013890.5A CN202311013890A CN117164141A CN 117164141 A CN117164141 A CN 117164141A CN 202311013890 A CN202311013890 A CN 202311013890A CN 117164141 A CN117164141 A CN 117164141A
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- Prior art keywords
- water
- primary
- integrated system
- stage
- membrane filtration
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 169
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000005374 membrane filtration Methods 0.000 claims abstract description 87
- 238000001914 filtration Methods 0.000 claims abstract description 53
- 238000004062 sedimentation Methods 0.000 claims abstract description 32
- 239000004576 sand Substances 0.000 claims abstract description 19
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 14
- 238000011010 flushing procedure Methods 0.000 claims abstract description 7
- 238000011001 backwashing Methods 0.000 claims description 16
- 239000012528 membrane Substances 0.000 claims description 8
- 238000005273 aeration Methods 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 7
- 239000013043 chemical agent Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 208000028659 discharge Diseases 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000009287 sand filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides an RO water production system, which comprises a primary RO filtering system, an RO water tank and an oxidation ditch; the primary RO filtration system comprises a primary sand filter, a clean water tank, an ozone tank, a primary flat membrane filtration integrated system, a primary water producing tank, a primary RO filtration device and a primary flat membrane filtration integrated system which are connected in sequence; the first-stage flat membrane filtration integrated system is provided with a first-stage sedimentation tank; part of water in the clean water tank is used for back flushing the first-stage sand filter tank; the water after the back flushing of the first-stage sand filter tank is discharged to a first-stage flat membrane filtration integrated system; the produced water of the first-stage flat membrane filtration integrated system is discharged to a clean water tank; part of water in the primary water producing pool is used for back flushing the primary columnar membrane filtration integrated system; the first-stage columnar membrane filtration integrated system is used for exhausting the concentration to the first-stage sedimentation tank; the produced water of the first-stage RO filter device is discharged to an RO water tank; the oxidation ditch is used for treating the water concentrated after filtration, and the design has low running cost and small occupied space.
Description
Technical Field
The invention relates to the technical field of water treatment systems, in particular to an RO water production system.
Background
The sewage can reach the discharge standard and can be recycled after biological treatment, the water after biological treatment can be further treated into RO grade water according to the use requirement, the conventional RO water treatment system usually adopts sand filtration, UF and RO filtration to combine to realize multistage RO water production, one sand filter needs two, one is used for filtering the backwash water, the occupied area of the sand filter is large, the backwash water quantity is large, the more the backwash water quantity is needed to be treated, the more the backwash water of each stage of sand filtration is required to be discharged back into the first sand filter for treatment, the water is equivalent to a return path, the water of each backwash is required to be subjected to one stage of UF filtration again, the actual water quantity of the system is far larger than the water quantity of raw water discharge, the running cost of the ozone pond is high, the running cost of the ozone pond is calculated according to the treatment water quantity, the water quantity of the mode needs to be larger through the ozone pond, and the overall cost is high.
Disclosure of Invention
The object of the present invention is to provide an RO water production system to solve the problems mentioned in the background art.
In order to achieve the above object, the present invention provides the following technical solutions:
an RO water production system comprises a primary RO filtering system, an RO water tank and an oxidation ditch; the primary RO filtration system comprises a primary sand filter, a clean water tank, an ozone tank, a primary flat membrane filtration integrated system, a primary water production tank, a primary RO filtration device and a primary flat membrane filtration integrated system which are connected in sequence; the primary flat membrane filtration integrated system is provided with a primary sedimentation tank; part of water in the clean water tank is used for backwashing the first-stage sand filter tank; the water after the back flushing of the primary sand filter tank is discharged to a primary flat membrane filtration integrated system; the produced water of the first-stage flat membrane filtration integrated system is discharged to a clean water tank; part of water in the primary water producing pool is used for backwashing the primary columnar membrane filtration integrated system; the first-stage columnar membrane filtration integrated system is used for exhausting the concentration to the first-stage sedimentation tank; the produced water of the primary RO filtering device is discharged to an RO water tank; the oxidation ditch is used for treating the water concentrated after filtration.
Further describing the present invention, a secondary RO filtration system is included; the secondary RO filtration system comprises an ozone aeration tank, a secondary columnar membrane filtration integrated system, a secondary water producing tank and a secondary RO filtration device which are connected in sequence; the concentrated sewage of the primary RO filter device is discharged to an ozone aeration tank; the produced water of the secondary RO filter device is discharged to an RO water tank; part of water in the secondary water producing pool is used for backwashing the secondary columnar membrane filtration integrated system; and the secondary columnar membrane filtration integrated system is used for exhausting the concentration to the primary sedimentation tank.
The invention further comprises a three-stage flat membrane filtration integrated system and a four-stage columnar membrane filtration integrated system; the three-stage flat membrane filtration integrated system is provided with a secondary sedimentation tank; concentrated sewage of the secondary filtering device is discharged to an oxidation ditch, and is discharged to a tertiary flat-plate membrane filtering integrated system after being treated by the oxidation ditch; the produced water of the three-stage flat membrane filtration integrated system is discharged as tail water; the secondary sedimentation tank is arranged for concentration to the primary sedimentation tank; the first-stage RO filter device and the second-stage RO filter device are discharged to a four-stage columnar membrane filtration integrated system through mold washing water cleaned by chemical agents; the produced water of the four-stage columnar membrane filtration integrated system is discharged to a secondary water producing pool; the four-stage columnar membrane filtration integrated system is used for exhausting the concentration to a first-stage sedimentation tank; and part of water in the secondary water producing pool is also used for backwashing of the three-stage flat membrane filtration integrated system and the four-stage columnar membrane filtration integrated system.
The beneficial effects of the invention are as follows:
the flat membrane filtration integrated system is immersed, the flat membrane is immersed in the tank to filter water, raw water is filtered by the first-stage sand filter and then is discharged to the clean water tank, part of water in the clean water tank is used for back flushing of the first-stage sand filter, the back flushed water is discharged to the first-stage flat membrane filtration integrated system, water produced after filtering by the first-stage flat membrane filtration integrated system is discharged to the clean water tank, and after filtering by the first-stage flat membrane filtration integrated system, the first-stage sedimentation tank of the first-stage flat membrane filtration system is used for discharging concentration, and a small part of water is sent out after the concentration, so that the total water treatment capacity is not increased, and is reduced, the running cost is reduced, the clean water tank is discharged to the first-stage columnar membrane filtration integrated system after being treated by the ozone tank, the setting of the ozone tank is used for protecting the first-stage RO filter device, the columnar membrane filtration integrated system is filtered to be divided into two parts, the water produced by the first-stage is discharged to the clean water tank, the other part is discharged to be directly discharged to the sedimentation tank, the back filtering circulation is carried out, and the back filtering is carried out by direct discharging, thus the filter pressing is not needed, the whole water treatment is reduced, the whole water treatment capacity is required to be filtered, the water source is reduced, the running cost is reduced, and the whole filter system is required to have a large, and the running cost is reduced compared with the number of the columnar filtration integrated system, and the whole system is required to have a small, and compared with the filter system.
Drawings
FIG. 1 is a block diagram of the process flow of the present invention;
fig. 2 is a process flow block diagram of a conventional RO water production system.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
1-2, an RO water production system includes a primary RO filtration system, an RO basin, and an oxidation ditch; the primary RO filtration system comprises a primary sand filter, a clean water tank, an ozone tank, a primary flat membrane filtration integrated system, a primary water production tank, a primary RO filtration device and a primary flat membrane filtration integrated system which are connected in sequence; the primary flat membrane filtration integrated system is provided with a primary sedimentation tank; part of water in the clean water tank is used for backwashing the first-stage sand filter tank; the water after the back flushing of the primary sand filter tank is discharged to a primary flat membrane filtration integrated system; the produced water of the first-stage flat membrane filtration integrated system is discharged to a clean water tank; part of water in the primary water producing pool is used for backwashing the primary columnar membrane filtration integrated system; the first-stage columnar membrane filtration integrated system is used for exhausting the concentration to the first-stage sedimentation tank; the produced water of the primary RO filtering device is discharged to an RO water tank; the oxidation ditch is used for treating the water concentrated after filtration; the flat membrane filtration integrated system is immersed, the flat membrane and the columnar membrane are ultrafiltration ceramic membranes, the flat membrane is immersed in a tank to filter water, raw water is filtered by the first-stage sand filter tank and then is discharged to a clean water tank, part of water in the clean water tank is used for backwashing the first-stage sand filter tank, the backwashed water is discharged to the first-stage flat membrane filtration integrated system, water produced after filtration by the first-stage flat membrane filtration integrated system is discharged to the clean water tank, and after filtration by the first-stage flat membrane filtration integrated system, a first-stage sedimentation tank of the first-stage flat membrane filtration integrated system is used for discharging concentrate, and a small part of water is fed out along with the concentrate during discharge, so that the overall water treatment capacity of the clean water tank is not increased, but is reduced, the running cost is reduced, the clean water is discharged to the first-stage columnar membrane filtration integrated system after treatment by the ozone tank, the setting of the ozone tank is used for protecting the first-stage RO filtration device, the produced water is discharged to the first-stage production tank, the other part is directly discharged to the first-stage sedimentation tank, the concentrate part is continuously filtered and the filter circulation is directly discharged, and the filter-press is filtered, therefore, the water treatment cost is reduced, and the whole filter system is required to be reduced compared with the water filtration system, and the whole system has a small-stage filtration integrated system, and the cost is reduced compared with the water filtration system, and the required by the whole filtration system, and the whole filtration system has a small-stage filtration system, and the cost is reduced.
The system also comprises a secondary RO filtering system; the secondary RO filtration system comprises an ozone aeration tank, a secondary columnar membrane filtration integrated system, a secondary water producing tank and a secondary RO filtration device which are connected in sequence; the concentrated sewage of the primary RO filter device is discharged to an ozone aeration tank; the produced water of the secondary RO filter device is discharged to an RO water tank; part of water in the secondary water producing pool is used for backwashing the secondary columnar membrane filtration integrated system; the secondary columnar membrane filtration integrated system is used for discharging the water to the primary sedimentation tank, the ozone aeration tank is used for treating the water quality and protecting the secondary RO filter device, the water produced by the secondary columnar membrane filtration integrated system is discharged to the secondary water producing tank, partial water produced by the secondary water producing tank is used for backwashing the secondary columnar membrane filtration integrated system, the water discharged to the primary sedimentation tank is concentrated after backwashing, the water in the secondary water producing tank is discharged to the secondary RO filter device, RO water produced by the secondary RO filter device is discharged to the RO water tank, and the secondary RO filter system is arranged for improving the water production rate of the RO water.
The system also comprises a three-stage flat membrane filtration integrated system and a four-stage columnar membrane filtration integrated system; the three-stage flat membrane filtration integrated system is provided with a secondary sedimentation tank; concentrated sewage of the secondary filtering device is discharged to an oxidation ditch, and is discharged to a tertiary flat-plate membrane filtering integrated system after being treated by the oxidation ditch; the produced water of the three-stage flat membrane filtration integrated system is discharged as tail water; the secondary sedimentation tank is arranged for concentration to the primary sedimentation tank; the first-stage RO filter device and the second-stage RO filter device are discharged to a four-stage columnar membrane filtration integrated system through mold washing water cleaned by chemical agents; the produced water of the four-stage columnar membrane filtration integrated system is discharged to a secondary water producing pool; the four-stage columnar membrane filtration integrated system is used for exhausting the concentration to a first-stage sedimentation tank; and part of water in the secondary water producing pond is also used for backwashing of the tertiary flat-plate membrane filtration integrated system and the quaternary cylindrical membrane filtration integrated system, the tertiary flat-plate membrane filtration integrated system carries out final treatment on tail water in a pollution discharge stage, after the tail water is filtered by the tertiary flat-plate membrane filtration integrated system, produced water reaches a tail water discharge standard and is discharged to a primary sedimentation tank after being filtered by the tertiary flat-plate membrane filtration integrated system, when the primary RO device and the secondary RO device carry out chemical agent cleaning, the washing water is discharged to the quaternary cylindrical membrane filtration integrated system for filtration, the produced water is discharged to the secondary water producing pond after filtration, the water in the secondary water producing pond also provides backwashing water for the tertiary flat-plate membrane filtration integrated system and the quaternary cylindrical membrane filtration integrated system, the quaternary cylindrical membrane filtration integrated system is backwashed to the primary sedimentation tank for concentration, and finally the tertiary flat-plate membrane filtration integrated system uniformly discharges filter pressing treatment in the primary sedimentation tank after the secondary sedimentation tank is abutted to sediment sludge.
The above description should not be taken as limiting the scope of the invention, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.
Claims (3)
1. An RO water production system, characterized in that: comprises a primary RO filtering system, an RO water tank and an oxidation ditch; the primary RO filtration system comprises a primary sand filter, a clean water tank, an ozone tank, a primary flat membrane filtration integrated system, a primary water production tank, a primary RO filtration device and a primary flat membrane filtration integrated system which are connected in sequence; the primary flat membrane filtration integrated system is provided with a primary sedimentation tank; part of water in the clean water tank is used for backwashing the first-stage sand filter tank; the water after the back flushing of the primary sand filter tank is discharged to a primary flat membrane filtration integrated system; the produced water of the first-stage flat membrane filtration integrated system is discharged to a clean water tank; part of water in the primary water producing pool is used for backwashing the primary columnar membrane filtration integrated system; the first-stage columnar membrane filtration integrated system is used for exhausting the concentration to the first-stage sedimentation tank; the produced water of the primary RO filtering device is discharged to an RO water tank; the oxidation ditch is used for treating the water concentrated after filtration.
2. The RO water production system of claim 1 wherein: the system also comprises a secondary RO filtering system; the secondary RO filtration system comprises an ozone aeration tank, a secondary columnar membrane filtration integrated system, a secondary water producing tank and a secondary RO filtration device which are connected in sequence; the concentrated sewage of the primary RO filter device is discharged to an ozone aeration tank; the produced water of the secondary RO filter device is discharged to an RO water tank; part of water in the secondary water producing pool is used for backwashing the secondary columnar membrane filtration integrated system; and the secondary columnar membrane filtration integrated system is used for exhausting the concentration to the primary sedimentation tank.
3. The RO water production system of claim 2 wherein: the system also comprises a three-stage flat membrane filtration integrated system and a four-stage columnar membrane filtration integrated system; the three-stage flat membrane filtration integrated system is provided with a secondary sedimentation tank; concentrated sewage of the secondary filtering device is discharged to an oxidation ditch, and is discharged to a tertiary flat-plate membrane filtering integrated system after being treated by the oxidation ditch; the produced water of the three-stage flat membrane filtration integrated system is discharged as tail water; the secondary sedimentation tank is arranged for concentration to the primary sedimentation tank; the first-stage RO filter device and the second-stage RO filter device are discharged to a four-stage columnar membrane filtration integrated system through mold washing water cleaned by chemical agents; the produced water of the four-stage columnar membrane filtration integrated system is discharged to a secondary water producing pool; the four-stage columnar membrane filtration integrated system is used for exhausting the concentration to a first-stage sedimentation tank; and part of water in the secondary water producing pool is also used for backwashing of the three-stage flat membrane filtration integrated system and the four-stage columnar membrane filtration integrated system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311013890.5A CN117164141A (en) | 2023-08-14 | 2023-08-14 | RO water production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311013890.5A CN117164141A (en) | 2023-08-14 | 2023-08-14 | RO water production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117164141A true CN117164141A (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311013890.5A Pending CN117164141A (en) | 2023-08-14 | 2023-08-14 | RO water production system |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012239948A (en) * | 2011-05-17 | 2012-12-10 | Toray Ind Inc | Method for washing filter medium, and water treatment apparatus |
| CN105174637A (en) * | 2015-10-03 | 2015-12-23 | 中国轻工业长沙工程有限公司 | Pretreatment process for papermaking tail water recycling and zero discharge |
| KR101606568B1 (en) * | 2015-11-26 | 2016-03-28 | (주)대우건설 | Membrane filteration apparatus and method for reusing back washing discharge water and filter to waste water |
| CN206375756U (en) * | 2016-12-28 | 2017-08-04 | 浙江华源颜料股份有限公司 | A kind of iron oxide yellow produces the Treated sewage reusing processing system of waste water |
| CN111635029A (en) * | 2020-06-02 | 2020-09-08 | 杭州聚合顺新材料股份有限公司 | Reclaimed water recycling system for sewage treatment and control method thereof |
-
2023
- 2023-08-14 CN CN202311013890.5A patent/CN117164141A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012239948A (en) * | 2011-05-17 | 2012-12-10 | Toray Ind Inc | Method for washing filter medium, and water treatment apparatus |
| CN105174637A (en) * | 2015-10-03 | 2015-12-23 | 中国轻工业长沙工程有限公司 | Pretreatment process for papermaking tail water recycling and zero discharge |
| KR101606568B1 (en) * | 2015-11-26 | 2016-03-28 | (주)대우건설 | Membrane filteration apparatus and method for reusing back washing discharge water and filter to waste water |
| CN206375756U (en) * | 2016-12-28 | 2017-08-04 | 浙江华源颜料股份有限公司 | A kind of iron oxide yellow produces the Treated sewage reusing processing system of waste water |
| CN111635029A (en) * | 2020-06-02 | 2020-09-08 | 杭州聚合顺新材料股份有限公司 | Reclaimed water recycling system for sewage treatment and control method thereof |
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