CN111533335A - Filtering and concentration-discharging process for waste liquid of slow wire moving - Google Patents
Filtering and concentration-discharging process for waste liquid of slow wire moving Download PDFInfo
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- CN111533335A CN111533335A CN202010387079.3A CN202010387079A CN111533335A CN 111533335 A CN111533335 A CN 111533335A CN 202010387079 A CN202010387079 A CN 202010387079A CN 111533335 A CN111533335 A CN 111533335A
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- membrane system
- filtering
- waste liquid
- membrane
- liquid
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Links
- 239000007788 liquid Substances 0.000 title claims abstract description 78
- 238000001914 filtration Methods 0.000 title claims abstract description 43
- 239000002699 waste material Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007599 discharging Methods 0.000 title claims abstract description 10
- 239000012528 membrane Substances 0.000 claims abstract description 131
- 239000002455 scale inhibitor Substances 0.000 claims abstract description 11
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 8
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000004062 sedimentation Methods 0.000 claims abstract description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims description 4
- 238000011033 desalting Methods 0.000 abstract description 4
- 238000001223 reverse osmosis Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000012141 concentrate Substances 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000005406 washing Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a filtering and concentrating process for slow-speed wire-moving waste liquid, which comprises the steps of enabling the waste liquid to sequentially pass through an oil/slag removing tank, a sedimentation tank, a security filter and a scale inhibitor container, and then sequentially pass through a UF membrane system, a DTRO membrane system, a first RO membrane system and a second RO membrane system; the filtering and concentration-discharging process is used for obtaining recyclable effluent, the conductivity of the effluent is less than or equal to 10, and the pH value of the effluent is equal to 7; and when the concentrate is discharged after filtration, the corresponding concentrate is sequentially discharged into the previous-stage membrane system, and finally the concentrate in the UF membrane system is discharged to the outside. According to the filtering and concentration-discharging process for the slow-moving waste liquid, before the waste liquid enters the filtering membrane system, oil/slag, large particles and mechanical impurities in the waste liquid can be effectively filtered, calcium ions and magnesium ions can be prevented from being crystallized and separated out, and the service life of the filtering membrane is effectively prolonged. Most of hardness is removed by utilizing the excellent desalting performance of the RO reverse osmosis membrane, and the effluent quality is good. The concentration discharge method also improves the service life of the filtering membrane.
Description
Technical Field
The invention relates to a filtering and concentration-discharging process for slow-speed wire-moving waste liquid.
Background
The existing slow-moving silk waste liquid treatment method is generally used for treating the slow-moving silk waste liquid with the conductivity of about 500 and the COD (chemical oxygen demand) of 1000-1500. The process is complicated, the effluent quality is poor, the conductivity is high, and the recycling is inconvenient. Meanwhile, because the concentrated solution is discharged unreasonably, the filtering efficiency, the filtering quality and the service life of the filtering membrane are affected.
Disclosure of Invention
The invention aims to provide a filtering and concentration-discharging process for slow-spinning waste liquid, which has the advantages of simple steps, reasonable cost, higher water outlet efficiency, better water quality of outlet water and longer service life of a filtering membrane.
In order to achieve the purpose, the invention adopts the technical scheme that:
a filtering and concentrating process for waste liquid of slow-speed wire winding is characterized in that the waste liquid sequentially passes through an oil/residue removing tank, a sedimentation tank, a cartridge filter and a scale inhibitor container and then sequentially passes through a UF (ultraviolet) membrane system, a DTRO (draw back reverse osmosis) membrane system, a first RO membrane system and a second RO membrane system;
the cartridge filter is used for filtering mechanical impurities with the particle size larger than 5 micrometers;
the scale inhibitor container is used for preventing calcium ions and magnesium ions from crystallizing out through the scale inhibitor;
the filtration and concentration discharge process is used for obtaining recyclable effluent, the conductivity of the effluent is less than or equal to 10, and the pH value of the effluent is equal to 7;
when the concentration is discharged after filtration: and corresponding concentrated solutions in the second RO membrane system, the first RO membrane system, the DTRO membrane system and the UF membrane system are sequentially discharged into an upper-stage system, and finally the concentrated solution in the UF membrane system is discharged to the outside.
Preferably, when the concentrated solution is discharged, the corresponding power device is closed after delaying a period of time after the concentrated solution in the corresponding membrane system is emptied.
Preferably, the UF membrane system, the DTRO membrane system, the first RO membrane system, and the second RO membrane system each include a power pump and a working level, wherein after the liquid in any one system reaches the corresponding working level, the corresponding power pump is started, and the system of this stage starts to work.
Preferably, the UF membrane system, the DTRO membrane system, the first RO membrane system, the second RO membrane system each comprise a low liquid level and a high liquid level;
in the UF membrane system: replenishing waste liquid when the liquid reaches a corresponding low liquid level; stopping replenishing the waste liquid when the liquid reaches the corresponding high liquid level;
the DTRO membrane system, the first RO membrane system, the second RO membrane system: when the liquid in any system reaches the corresponding low liquid level, the system stops working; when the liquid in any system reaches the corresponding high liquid level, the upper-level system stops working.
Preferably, the liquid output from the second RO membrane system is subjected to ultraviolet disinfection.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the filtering and concentration-discharging process for the slow-moving waste liquid, before the waste liquid enters the filtering membrane system, oil/slag, large particles and mechanical impurities in the waste liquid can be effectively filtered, calcium ions and magnesium ions can be prevented from being crystallized and separated out, and the service life of the filtering membrane is effectively prolonged. The waste liquid passes through the UF membrane system, the DTRO membrane system, the first RO membrane system and the second RO membrane system in sequence, most of hardness is removed by utilizing the excellent desalting performance of the RO reverse membrane, and the effluent quality is good. When the concentration is discharged, the generated concentrated solution is sequentially discharged into the upper-stage membrane system, and finally the concentrated solution in the UF membrane system is discharged to the outside, so that the filtering efficiency, the filtering quality and the service life of the filtering membrane are improved.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
According to the filtering and concentration-discharging process for the slow-speed wire-moving waste liquid, the waste liquid sequentially passes through an oil/residue removing tank, a sedimentation tank, a cartridge filter and a scale inhibitor container, then sequentially passes through a UF membrane system, a DTRO membrane system, a first RO membrane system and a second RO membrane system, finally, ultraviolet disinfection and sterilization are carried out, and outlet water is guided to a discharge point or a use point.
The oil/slag removing tank is used for removing oil/slag in the waste liquid, and the sedimentation tank is used for removing large-particle heavy objects in the waste liquid.
In the filtering membrane system, calcium ions and magnesium ions in water are gradually concentrated along with the continuous seepage of fresh water, and when the concentration reaches the saturation degree of the calcium ions and the magnesium ions, the calcium ions and the magnesium ions are crystallized and separated out on the concentrated water side or in the pipeline of the filtering membrane to form a structural layer, so that the water yield and the water quality of the filtering membrane are influenced. Through the scale inhibitor container, the waste liquid passes through the scale inhibitor, and the chelation of the scale inhibitor is utilized, so that calcium ions and magnesium ions can be prevented from being crystallized and separated out, and the water yield and the water quality of the produced water are improved.
The cartridge filter is used for filtering mechanical impurities with the particle size larger than 5 micrometers so as to prevent large-particle substances from entering the filtering membrane and prolong the service life of the filtering membrane.
In a filter membrane system, the strong oil-resistant and stain-resistant characteristics of UF membrane ultrafiltration are utilized for primary treatment; secondly, performing secondary treatment by utilizing the characteristics of high water quality, stable separation performance, low energy consumption and high recovery rate of the effluent of the DTRO membrane; the third stage utilizes the excellent desalting performance of reverse osmosis of the RO membrane to remove most of hardness; in order to ensure the quality of the effluent and stably use the excellent desalting performance of reverse osmosis of the RO membrane, the fourth-stage treatment is carried out. The whole filtering membrane system has low operation cost and good effluent quality.
The UF membrane system, the DTRO membrane system, the first RO membrane system and the second RO membrane system respectively comprise a power pump and working liquid levels, wherein after liquid in any system reaches the corresponding working liquid level, the corresponding power pump is started, the system at the stage starts to work, liquid in the system is filtered, and the filtered clear liquid is discharged into the next-stage system.
The UF membrane system, the DTRO membrane system, the first RO membrane system and the second RO membrane system respectively comprise a low liquid level and a high liquid level; in a UF membrane system: replenishing waste liquid when the liquid reaches a corresponding low liquid level; stopping replenishing the waste liquid when the liquid reaches the corresponding high liquid level; in the DTRO membrane system, the first RO membrane system, the second RO membrane system: when the liquid in any system reaches the corresponding low liquid level, the system stops working; when the liquid in any system reaches the corresponding high liquid level, the upper-level system stops working.
When the concentration is discharged after filtration: and corresponding concentrated solution in the second RO membrane system, the first RO membrane system, the DTRO membrane system and the UF membrane system is sequentially discharged into the previous-stage system, and finally the concentrated solution in the UF membrane system is discharged to the outside. Specifically, the concentrated solution in the second RO membrane system is discharged into the first RO membrane system, then the concentrated solution in the first RO membrane system is discharged into the DTRO membrane system, then the concentrated solution in the DTRO membrane system is discharged into the UF membrane system, and finally all the concentrated solution in the UF membrane system is discharged into the outside, for example, a concentrated solution storage tank.
When the concentrated solution is discharged, after the concentrated solution in the corresponding membrane system is emptied, the corresponding power device, such as a power pump, is closed after a time delay. Through this setting, can thorough evacuation membrane system in the dense liquid, further improve membrane life-span.
When the liquid production amount of any one of the UF membrane system, the DTRO membrane system, the first RO membrane system and the second RO membrane system is abnormally reduced, the system stops working and carries out membrane cleaning.
In the UF membrane system, the DTRO membrane system, the first RO membrane system, the second RO membrane system, when four systems wash simultaneously, the cleaner is reverse to wash, loops through second RO membrane system, first RO membrane system, DTRO membrane system, UF membrane system in proper order. The cleaning agent is acid liquor and/or alkali liquor.
After acid washing and before alkali washing, sequentially introducing clean water into the second RO membrane system, the first RO membrane system, the DTRO membrane system and the UF membrane system; and (3) introducing clean water into the second RO membrane system, the first RO membrane system, the DTRO membrane system and the UF membrane system in sequence before carrying out alkali washing and acid washing, so as to prevent the effect loss caused by acid-base neutralization.
The filtering and concentration-discharging process is used for treating the slow-running waste liquid with the conductivity of about 500 and the COD (chemical oxygen demand) of 1000-1500, and finally the recyclable effluent can be obtained, wherein the conductivity of the effluent is less than or equal to 10, and the pH value of the effluent is equal to 7.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (5)
1. A filtering and concentration-discharging process for slow-speed wire-moving waste liquid is characterized in that: the waste liquid sequentially passes through an oil/slag removal tank, a sedimentation tank, a cartridge filter and a scale inhibitor container and then sequentially passes through a UF membrane system, a DTRO membrane system, a first RO membrane system and a second RO membrane system;
the cartridge filter is used for filtering mechanical impurities with the particle size larger than 5 micrometers;
the scale inhibitor container is used for preventing calcium ions and magnesium ions from crystallizing out through the scale inhibitor;
the filtration and concentration discharge process is used for obtaining recyclable effluent, the conductivity of the effluent is less than or equal to 10, and the pH value of the effluent is equal to 7;
when the concentration is discharged after filtration: and corresponding concentrated solutions in the second RO membrane system, the first RO membrane system, the DTRO membrane system and the UF membrane system are sequentially discharged into an upper-stage system, and finally the concentrated solution in the UF membrane system is discharged to the outside.
2. The process of claim 1 for filtering and concentrating slow-moving waste liquid, which is characterized in that: and when the concentrated solution is discharged, delaying a period of time and then closing the corresponding power device after the concentrated solution in the corresponding membrane system is emptied.
3. The process of claim 1 for filtering and concentrating slow-moving waste liquid, which is characterized in that: the UF membrane system, the DTRO membrane system, the first RO membrane system and the second RO membrane system respectively comprise a power pump and a working liquid level, wherein after liquid in any system reaches the corresponding working liquid level, the corresponding power pump is started, and the system at the stage starts to work.
4. The process of claim 1 for filtering and concentrating slow-moving waste liquid, which is characterized in that: the UF membrane system, the DTRO membrane system, the first RO membrane system, and the second RO membrane system each comprise a low liquid level and a high liquid level;
in the UF membrane system: replenishing waste liquid when the liquid reaches a corresponding low liquid level; stopping replenishing the waste liquid when the liquid reaches the corresponding high liquid level;
the DTRO membrane system, the first RO membrane system, the second RO membrane system: when the liquid in any system reaches the corresponding low liquid level, the system stops working; when the liquid in any system reaches the corresponding high liquid level, the upper-level system stops working.
5. The process of claim 1 for filtering and concentrating slow-moving waste liquid, which is characterized in that: and carrying out ultraviolet disinfection on the liquid output from the second RO membrane system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010387079.3A CN111533335A (en) | 2020-05-09 | 2020-05-09 | Filtering and concentration-discharging process for waste liquid of slow wire moving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010387079.3A CN111533335A (en) | 2020-05-09 | 2020-05-09 | Filtering and concentration-discharging process for waste liquid of slow wire moving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111533335A true CN111533335A (en) | 2020-08-14 |
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ID=71973607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010387079.3A Pending CN111533335A (en) | 2020-05-09 | 2020-05-09 | Filtering and concentration-discharging process for waste liquid of slow wire moving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111533335A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6187197B1 (en) * | 1998-10-28 | 2001-02-13 | Marvin Haddock | Multi-stage engine coolant recycling process |
| CN206692498U (en) * | 2017-02-09 | 2017-12-01 | 杭州上拓环境科技股份有限公司 | A kind of saliferous phosphorus-containing wastewater recycling treatment system |
| CN108002566A (en) * | 2017-11-28 | 2018-05-08 | 刘宁 | A kind of double film waste water treatment systems reverse osmosis based on Full-automatic ultra-filtering+RO and method |
| CN207330613U (en) * | 2017-08-14 | 2018-05-08 | 武汉立为工程技术有限公司 | A kind of film concentrates desulfurization wastewater Zero discharging system |
| CN209442763U (en) * | 2018-06-25 | 2019-09-27 | 新阳科技集团有限公司 | A kind of wastewater from chemical industry cyclic utilization system |
-
2020
- 2020-05-09 CN CN202010387079.3A patent/CN111533335A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6187197B1 (en) * | 1998-10-28 | 2001-02-13 | Marvin Haddock | Multi-stage engine coolant recycling process |
| CN206692498U (en) * | 2017-02-09 | 2017-12-01 | 杭州上拓环境科技股份有限公司 | A kind of saliferous phosphorus-containing wastewater recycling treatment system |
| CN207330613U (en) * | 2017-08-14 | 2018-05-08 | 武汉立为工程技术有限公司 | A kind of film concentrates desulfurization wastewater Zero discharging system |
| CN108002566A (en) * | 2017-11-28 | 2018-05-08 | 刘宁 | A kind of double film waste water treatment systems reverse osmosis based on Full-automatic ultra-filtering+RO and method |
| CN209442763U (en) * | 2018-06-25 | 2019-09-27 | 新阳科技集团有限公司 | A kind of wastewater from chemical industry cyclic utilization system |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20200814 |
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