CN112744974A - Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment - Google Patents
Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment Download PDFInfo
- Publication number
- CN112744974A CN112744974A CN202110080860.0A CN202110080860A CN112744974A CN 112744974 A CN112744974 A CN 112744974A CN 202110080860 A CN202110080860 A CN 202110080860A CN 112744974 A CN112744974 A CN 112744974A
- Authority
- CN
- China
- Prior art keywords
- solid
- wastewater
- liquid separator
- pretreatment
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 127
- 239000004753 textile Substances 0.000 title claims abstract description 36
- 230000008929 regeneration Effects 0.000 title claims abstract description 10
- 238000011069 regeneration method Methods 0.000 title claims abstract description 10
- 125000004122 cyclic group Chemical group 0.000 title claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 116
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000004064 recycling Methods 0.000 claims abstract description 32
- 239000002253 acid Substances 0.000 claims abstract description 27
- 238000004043 dyeing Methods 0.000 claims abstract description 26
- 239000002910 solid waste Substances 0.000 claims abstract description 23
- 238000004448 titration Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 39
- 238000002844 melting Methods 0.000 claims description 29
- 230000008018 melting Effects 0.000 claims description 29
- 238000005406 washing Methods 0.000 claims description 23
- 239000008399 tap water Substances 0.000 claims description 18
- 235000020679 tap water Nutrition 0.000 claims description 18
- 241001122767 Theaceae Species 0.000 claims description 10
- 239000001397 quillaja saponaria molina bark Substances 0.000 claims description 10
- 229930182490 saponin Natural products 0.000 claims description 10
- 150000007949 saponins Chemical class 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 5
- 238000010025 steaming Methods 0.000 claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 17
- 150000002500 ions Chemical class 0.000 abstract description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 16
- 239000011575 calcium Substances 0.000 abstract description 16
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 abstract description 14
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 14
- 229910001425 magnesium ion Inorganic materials 0.000 abstract description 14
- 239000013522 chelant Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000018109 developmental process Effects 0.000 abstract description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 13
- 239000007787 solid Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005189 flocculation Methods 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000010309 melting process Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Images
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
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2101/10—Inorganic compounds
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
-
- 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
- C02F2303/10—Energy recovery
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 Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a special wastewater regeneration and recycling system for textile pretreatment, which comprises a pretreatment device, wherein the pretreatment device is sequentially connected with a first solid-liquid separator, a heat energy exchanger, a cooler, an acid titration tank and a second solid-liquid separator. The wastewater treated by the physical system has no heavy metal ions, calcium and magnesium ions, PTA organic matters, low turbidity, low water hardness and alkalescence, completely meets the application standard of textile printing and dyeing water, and can be recycled; the liquid is separated from the solid waste through the treatment of the system, the solid waste is recycled and comprehensively utilized, and the liquid does not contain a large amount of complex, chelate and PTA and can be recycled for a long time; in addition, the system can also replace heat in the wastewater to recycle the heat energy, so that long-time cyclic utilization of liquid and heat energy in the pretreatment wastewater is completely realized, green production is achieved, and sustainable development of the whole industry is realized.
Description
Technical Field
The invention belongs to the technical field of wastewater recycling, and particularly relates to a special wastewater recycling system for textile pretreatment.
Background
The whole printing and dyeing production process of the textile comprises pretreatment, dyeing, printing and after-finishing processes, wherein the pretreatment process is the most important position and is the basis of the subsequent process. The textile is treated by adopting pretreatment chemicals in the traditional pretreatment process, a large amount of wastewater is generated after the pretreatment process, and the pretreatment wastewater is directly recycled, so that three problems exist:
1. if a large amount of metal ions exist, heavy metal ions which cannot be completely complexed can cause oxidation damage to cloth surfaces in subsequent wastewater utilization, for example, fibers can burn when meeting the heavy metal ions after being added with hydrogen peroxide under an alkaline condition, and calcium and magnesium ions which cannot be integrated can cause the wastewater to be hard water to cause damage to the cloth surfaces;
2. a large amount of lignin and macromolecules of various substances exist, so that the turbidity of the wastewater is high, and secondary pollution can be generated in the process of recycling the wastewater;
3. there are a lot of organic matters, such as PET, PTA, wherein PET continuously falls off to produce PTA, and the waste water is converged and viscid in the recycling process, which causes the problem of dyeing quality.
The problems make the direct reuse of the pretreatment wastewater very difficult, the cost is extremely high, and the direct discharge affects the environment, so enterprises can only select a treatment mode with the lowest cost, reduce the COD in the pretreatment wastewater to 200PPM and then discharge the wastewater to a social unified pipe network for centralized treatment. Therefore, the pretreatment wastewater cannot be directly reused and zero emission cannot be realized. Long-term research shows that pretreatment chemicals in the traditional pretreatment process can be replaced by the aloha tea saponin, so that the problems are basically solved, but a large amount of complex, chelate and PTA exist in the wastewater, so that the wastewater cannot be recycled for a long time, and the heat in the wastewater is easily wasted.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a special wastewater regeneration and recycling system for textile pretreatment, which aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a textile pretreatment special wastewater regeneration cyclic utilization system, includes the pretreatment device, the pretreatment device connects gradually first solid-liquid separator, heat energy exchanger, cooler, acid titration jar and second solid-liquid separator.
By adopting the technical scheme, the pretreatment wastewater generated by treating textiles with the tea saponin in the pretreatment device is introduced into a first solid-liquid separator, the first solid-liquid separator separates solids such as fibers, heavy metal ion complexes, calcium and magnesium ions and chelate from liquid in the wastewater, the separated wastewater enters a heat energy exchanger for heat exchange and temperature reduction, the cooled wastewater enters a cooler for secondary temperature reduction, the wastewater subjected to temperature reduction twice enters an acid titration tank, the organic matters in the wastewater flocculate with acid in the acid titration tank, the flocculated wastewater enters a second solid-liquid separator, the second solid-liquid separator separates the flocculate from the liquid, the separated liquid has no heavy metal ions, no calcium and magnesium ions, no PTA organic matters, low turbidity, low water hardness and alkalescence, completely meets the application standard of textile printing and dyeing water, and can be recycled, the discharge is not up to standard, the environment is polluted, and the resource is wasted. After the system is used for treatment, liquid is separated from solid waste, the solid waste is recycled, the liquid does not contain a large amount of complex, chelate, PTA and the like, the liquid can be recycled for a long time, the drainage cost of an enterprise is reduced, and a large amount of water cost is saved. The heat in the waste water can be replaced through the heat exchanger in the treatment process of the system, the heat energy is recycled, the liquid and the heat energy in the textile pretreatment waste water are fully recycled, the green production is achieved, and the sustainable development of the whole industry is realized. The first solid-liquid separator is arranged to facilitate the separation of the solids such as fibers, heavy metal ion complexes, calcium and magnesium ion chelates and the like from the liquid in the wastewater; the arrangement of the heat energy exchanger is convenient for replacing heat in the pretreatment wastewater at about 100 ℃ for recycling, such as the heat energy is utilized to a subsequent washing process or a previous material melting process, or other places, so that the time consumption and waste of heat energy caused by natural cooling are avoided, and the treatment cost caused by cooling treatment at high temperature is also avoided; the arrangement of the cooler can further reduce the temperature of the wastewater so as to quickly meet the temperature requirement of subsequent neutralization and flocculation treatment and realize better flocculation effect; the acid titration tank is arranged for flocculating PTA organic matters in the wastewater to avoid the problem of dyeing quality caused by polymerization and reverse adhesion in the wastewater recycling process, and for reducing the pH value of the wastewater from about 12 to 7-8 to ensure the recycling safety of the wastewater. The acid in the acid titration tank is preferably dilute sulfuric acid. The second solid-liquid separator is arranged to separate solid such as flocculate and the like in the wastewater from liquid to obtain water which meets the standard of textile printing and dyeing water after treatment, so that the wastewater is changed into reusable water, such as a material melting process or a dye soaping process.
Further, a slag outlet of the first solid-liquid separator is connected with a first solid waste storage device. The first solid waste storage device is convenient for collecting the fiber, the heavy metal ion complex, the calcium and magnesium ion chelate and other solids separated by the first solid-liquid separator, and is convenient for resource recycling.
Further, a slag outlet of the second solid-liquid separator is connected with a second solid waste storage device. The second solid waste storage device is convenient for collecting flocculate which is separated by the second solid-liquid separator and contains a large amount of PTA, and is convenient for resource recycling.
Further, a liquid outlet of the second solid-liquid separator is connected with a waste water storage device. The waste water storage device is convenient for collecting and storing the waste water after the separation and exchange heat treatment so as to recycle the waste water as required.
Further, a liquid outlet of the wastewater storage device is connected with a dyeing and soaping device and/or a material melting device through a pipeline, and the material melting device is connected with the pretreatment device. The dyeing soaping device is a dyeing soaping machine, and the material melting device is a material melting box. A liquid outlet of the wastewater storage device is connected with the dyeing and soaping device through a pipeline, so that the treated wastewater is used as dyeing and soaping water; the liquid outlet of the waste water storage device is connected with the material melting device through a pipeline, so that the treated waste water is used as material melting water. When the treated wastewater is used as material dissolving water, the treated wastewater enters a material dissolving device to be dissolved, the treated wastewater is carried into a pretreatment device to be acted on the pretreatment of textiles, and finally flows out of the pretreatment device as wastewater again, and sequentially enters a first solid-liquid separator, a heat energy exchanger, a cooler, an acid titration tank, a second solid-liquid separator and a wastewater storage device to be treated for the next cycle for standby.
Furthermore, a heat exchange liquid inlet of the heat energy exchanger is communicated with tap water through a pipeline, a heat exchange liquid outlet of the heat energy exchanger is connected with a water washing device and/or a material melting device through a pipeline, and the water washing device is connected with the first solid-liquid separator. The water washing device is a water washing tank, a liquid inlet of heat exchange liquid of the heat energy exchanger is communicated with fresh tap water through a pipeline, so that the tap water subjected to heat exchange is used as water for washing and is conveyed to a last water washing tank to clean the cloth surface and supplement the water consumed by evaporation; the liquid outlet of the heat exchange liquid of the heat energy exchanger is connected with a material melting device through a pipeline, so that tap water after heat exchange is used as material melting water. Preferably, the heat-exchanged tap water is used as the washing water, and the treated wastewater is used as the chemical material water. The first solid-liquid separator, the heat exchange liquid outlet of the heat energy exchanger, the water washing device and the first solid-liquid separator are connected in sequence, so that circulation that fresh tap water is washed to change waste water into waste water which is not discharged and recycled through treatment is formed. Specifically, the waste water flowing out of the fresh heat exchange tap water through the last water washing tank directly enters the first solid-liquid separator without being discharged, then sequentially passes through the heat exchanger, the cooler, the acid titration tank and the second solid-liquid separator for treatment, and finally enters the waste water storage device for standby. The first solid-liquid separator, the heat exchange liquid outlet of the heat energy exchanger, the material melting device, the pretreatment device and the first solid-liquid separator are connected in sequence, so that the cycle that the pretreatment of the fresh tap water material melting is changed into waste water which is not discharged and recycled through treatment is formed. Specifically, fresh heat exchange tap water sequentially passes through a material melting device and a pretreatment device, wastewater flowing out of the pretreatment device is directly fed into a first solid-liquid separator without being discharged, then sequentially passes through a heat exchanger, a cooler, an acid titration tank and a second solid-liquid separator, and finally is fed into a wastewater storage device for standby.
Furthermore, the dissolving device is filled with the tea saponin. The tea saponin is a high and new technology product which is researched and developed aiming at pain points in the printing and dyeing industry and is mature, can effectively replace traditional pretreatment chemicals such as caustic soda and the like, can finish a pretreatment task in a short flow by one-agent forming, and does not need to use other chemical auxiliaries additionally. In addition, the tea saponin can chelate metal ions such as calcium, magnesium and the like in water, reduce the water hardness, complex heavy metal ions and greatly reduce the difficulty of wastewater treatment.
Further, the first solid-liquid separator is a drum filter, and a brush roller is arranged in the first solid-liquid separator.
Further, the second solid-liquid separator is a drum filter, and a brush roller is arranged in the second solid-liquid separator. The rotary drum type filter has low cost and simple operation, and has more ideal effect of collecting fibers falling off in water. The arrangement of the brush roller is convenient for filtering the fiber again and collecting the fiber.
Further, the pretreatment device is a steaming device or a boiling device.
Further, a pH tester is arranged on the acid titration tank. The pH tester is convenient for measuring the pH value of the wastewater after acid treatment, and ensures that the pH value of the effluent of the acid titration tank is neutral or alkalescent.
The invention has the following beneficial effects:
1. according to the regeneration and cyclic utilization system for the special wastewater generated in the pretreatment of the textile, the wastewater treated by the system is free of heavy metal ions, calcium and magnesium ions, PTA organic matters, turbidity and water hardness, is alkalescent, completely meets the application standard of textile printing and dyeing water, can be recycled, and avoids the problems of discharge failure to reach the standard, environmental pollution and resource waste. After the system is used for treatment, liquid is separated from solid waste, the solid waste is recycled, the liquid does not contain a large amount of complex, chelate and PTA, the liquid can be recycled for a long time, the drainage cost of an enterprise is reduced, and a large amount of water cost is saved. In addition, the heat in the wastewater can be replaced through the heat exchanger in the treatment process of the system, the heat energy is recycled, the liquid and the heat energy in the textile pretreatment wastewater are fully recycled, the green production is achieved, and the sustainable development of the whole industry is realized.
2. According to the special wastewater regeneration recycling system for textile pretreatment, the solid-liquid separation device is set to be the rotary drum type filter, so that the cost is low, the operation is simple, the effect of collecting fibers falling off in water is more ideal, and the fibers can be conveniently recovered. The arrangement of the brush roller is convenient for filtering and collecting the fibers.
3. The invention relates to a special wastewater regeneration recycling system for textile pretreatment, which is convenient for collecting fibers, heavy metal ion complexes, calcium and magnesium ion chelates and floccules containing a large amount of PTA separated by a solid-liquid separator through the arrangement of a solid-waste container, so that various material resources are fully recovered for recycling.
Drawings
FIG. 1 is a schematic structural diagram of a special wastewater recycling system for textile pretreatment.
In the figure: 1. a pretreatment device; 2. a first solid-liquid separator; 3. a thermal energy exchanger; 4. a cooler; 5. an acid titration tank; 6. a second solid-liquid separator; 7. a waste water storage device; 8. a first solid waste storage device; 9. a second solid waste storage device; 10. a dyeing soaping device; 11. a water washing device; 12. a material melting device.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1
A special wastewater regeneration recycling system for textile pretreatment is shown in figure 1 and comprises a pretreatment device 1, wherein the pretreatment device 1 is sequentially connected with a first solid-liquid separator 2, a heat energy exchanger 3, a cooler 4, an acid titration tank 5 and a second solid-liquid separator 6. Specifically, the pretreatment device 1 is a steaming device or a boiling device, the steaming device is a steamer, and the boiling device is a boiling machine. The first solid-liquid separator 2 is a rotary drum filter, and a brush roller is arranged in the first solid-liquid separator 2. The second solid-liquid separator 6 is a drum filter, and a brush roller is arranged in the second solid-liquid separator 6. The rotary drum type filter has low cost and simple operation, has more ideal effect of collecting fibers falling off in water and is convenient for recovering the fibers. The arrangement of the brush roller is convenient for filtering and collecting the fibers. The first solid-liquid separator 2 is arranged to separate the fiber, the heavy metal ion complex, the calcium and magnesium ion chelate and other solids from the liquid in the wastewater; the arrangement of the heat energy exchanger 3 is convenient for replacing heat in the pretreatment wastewater at about 100 ℃ for recycling, such as the heat can be utilized to a subsequent washing process or a previous material melting process, or other places, so that the time consumption and waste of heat energy caused by natural cooling are avoided, and the increase of treatment cost caused by cooling treatment at high temperature is also avoided; the arrangement of the cooler 4 can further reduce the temperature of the wastewater so as to quickly meet the temperature requirement of subsequent neutralization and flocculation treatment and realize better flocculation effect; the acid titration tank 5 is arranged for flocculating PTA organic matters in the wastewater to avoid the problem of dyeing quality caused by polymerization and reverse adhesion in the wastewater recycling process, and for reducing the pH value of the wastewater from about 12 to 7-8 to ensure the safety of wastewater recycling. Preferably, a pH tester is provided on the acid titration tank 5. The pH tester can measure the pH value of the wastewater after acid treatment, and ensure that the pH value of the effluent of the acid titration tank 5 is neutral or alkalescent. The second solid-liquid separator 6 is arranged to separate solid such as flocculate and liquid in the wastewater conveniently, so that water meeting the standard of textile printing and dyeing water after treatment is obtained. The acid in the acid titration tank 5 is preferably dilute sulfuric acid.
Further as shown in FIG. 1, the slag outlet of the first solid-liquid separator 2 is connected to a first solid waste receptacle 8. The first solid waste storage 8 is convenient for collecting the fiber, the heavy metal ion complex, the calcium and magnesium ion chelate and other solids separated by the first solid-liquid separator 2, and is convenient for resource recycling.
Further as shown in FIG. 1, the slag outlet of the second solid-liquid separator 6 is connected to a second solid waste receptacle 9. The second solid waste storage 9 is convenient for collecting the flocculate which is separated by the second solid-liquid separator 6 and contains a large amount of PTA, and is convenient for resource recycling.
As further shown in fig. 1, the liquid outlet of the second solid-liquid separator 6 is connected to a waste water storage device 7. The waste water storage device 7 is arranged to collect and store the waste water after the separation and exchange heat treatment so as to recycle the waste water according to the requirement.
As further shown in fig. 1, a liquid outlet of the waste water storage device 7 is connected to the dyeing and soaping device 10 and/or the material melting device 12 through a pipeline, and the material melting device 12 is connected to the pretreatment device 1. The dyeing and soaping device 10 is a dyeing and soaping machine, the material melting device 12 is a material melting box, and the material melting device 12 is filled with the tea saponin. The tea saponin can effectively replace traditional pretreatment chemicals such as caustic soda and the like, and the pretreatment task can be completed in a short flow by one-agent forming without additionally using other chemical auxiliaries. In addition, the aloha tea saponin can chelate metal ions such as calcium, magnesium and the like in water, reduce water hardness, complex heavy metal ions and greatly reduce the difficulty of wastewater treatment. The liquid outlet of the waste water storage device 7 is connected with the dyeing and soaping device 10 and/or the material melting device 12 through a pipeline, so that the treated waste water can be used as dyeing and soaping water or material melting water.
As further shown in fig. 1, a liquid inlet of the heat-exchange liquid of the heat energy exchanger 3 is connected to tap water through a pipeline, a liquid outlet of the heat-exchange liquid of the heat energy exchanger 3 is connected to the water washing device 11 and/or the material melting device 12 through a pipeline, and the water washing device 11 is connected to the first solid-liquid separator 2. The water washing device 11 is a water washing tank, and a liquid inlet of the heat exchange liquid of the heat energy exchanger 3 is communicated with tap water through a pipeline, so that the tap water subjected to heat exchange is used as water for washing and is conveyed to a last water washing tank to clean the cloth surface and supplement the water consumed by evaporation. The liquid outlet of the heat exchange liquid of the heat energy exchanger 3 is connected with the material melting device 12 through a pipeline, so that tap water after heat exchange is used as material melting water. Preferably, the heat-exchanged tap water is used as the washing water, and the treated wastewater is used as the chemical material water.
The specific work flow of the special wastewater recycling system for textile pretreatment provided by the embodiment is as follows:
firstly, introducing pretreatment wastewater generated by treating textiles with the tea saponin in a pretreatment device into a first solid-liquid separator 2, separating solids such as fibers, heavy metal ion complexes and calcium and magnesium ion chelates from liquid by the first solid-liquid separator 2 to obtain solids such as the fibers, the heavy metal ion complexes and the calcium and magnesium ion chelates and separated wastewater, and introducing the solids such as the fibers, the heavy metal ion complexes and the calcium and magnesium ion chelates into a first solid waste storage device 8 to be collected;
secondly, the separated wastewater separated by the first solid-liquid separator 2 enters a heat energy exchanger 3, meanwhile, normal-temperature fresh tap water enters the heat energy exchanger 3 from a heat exchange liquid inlet, the separated wastewater exchanges heat with the fresh tap water, the obtained heat fresh tap water sequentially enters a washing device 11 and/or a material melting device 12 through a heat exchange liquid outlet and a pipeline of the heat energy exchanger 3, the heat of the separated wastewater is fully utilized as water washing water heat or material melting water heat, and the separated wastewater flows through the heat energy exchanger 3 to exchange heat to obtain heat exchange and temperature reduction wastewater;
thirdly, the waste water after heat exchange and temperature reduction which flows out of the heat energy exchanger 3 enters a cooler 4 and is cooled again to obtain waste water after temperature reduction twice;
fourthly, the twice-cooled wastewater flowing out of the cooler 4 enters an acid titration tank 5, dilute sulfuric acid is added into the acid titration tank 5, organic matters in the wastewater are titrated to realize acid flocculation, flocculate-carrying wastewater is obtained, and the flocculate-carrying wastewater can flow out when the pH of the flocculate-carrying wastewater is determined to be 7-8 by a pH tester on the acid titration tank 5;
fifthly, the flocculate-carrying wastewater flowing out of the acid titration tank 5 enters a second solid-liquid separator 6, the flocculate and the wastewater are separated by the second solid-liquid separator 6 to obtain flocculate and treated wastewater, and the flocculate enters a second solid-waste container 9 to be collected;
and sixthly, the treated wastewater separated by the second solid-liquid separator 6 enters a wastewater storage device 7 to be stored, and the stored wastewater can be conveyed to a dyeing soaping device 10 and/or a material melting device 12 through pipelines according to requirements to be used as dyeing soaping water or material melting water.
In conclusion, the wastewater treated by the system of the embodiment has no heavy metal ions, no calcium and magnesium ions, no PTA organic matters, low turbidity, low water hardness and alkalescence, completely meets the application standard of textile printing and dyeing water, can be recycled, and avoids discharge failure to reach the standard, environmental pollution and resource waste. After the system is used for treatment, liquid is separated from solid waste, the solid waste is recycled, the liquid does not contain a large amount of complex, chelate and PTA, the liquid can be recycled for a long time, the drainage cost of an enterprise is reduced, and a large amount of water cost is saved. In addition, the heat in the wastewater can be replaced through the heat exchanger 3 in the treatment process of the system, the heat energy is recycled, the full recycling of liquid and heat energy in the textile pretreatment wastewater is completely realized, the green production is achieved, and the sustainable development of the whole industry is realized.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention and not for limiting the same, and although the embodiments of the present invention are described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the embodiments of the present invention, and these modifications or equivalent substitutions cannot make the modified technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a textile pretreatment special wastewater regeneration cyclic utilization system, includes pretreatment device (1), its characterized in that, pretreatment device (1) connects gradually first solid-liquid separator (2), heat energy exchanger (3), cooler (4), acid titration jar (5) and second solid-liquid separator (6).
2. The special wastewater recycling system for textile pretreatment according to claim 1, wherein a slag outlet of the first solid-liquid separator (2) is connected with a first solid waste storage (8).
3. The special wastewater recycling system for textile pretreatment according to claim 1, wherein a slag outlet of the second solid-liquid separator (6) is connected with a second solid waste storage (9).
4. The special wastewater recycling system for textile pretreatment according to claim 1, wherein a liquid outlet of the second solid-liquid separator (6) is connected with a wastewater storage device (7).
5. The special wastewater recycling system for textile pretreatment according to claim 4, wherein a liquid outlet of the wastewater storage device (7) is connected with the dyeing soaping device (10) and/or the material melting device (12) through a pipeline.
6. The special wastewater recycling system for textile pretreatment according to claim 1, wherein a heat exchange liquid inlet of the heat energy exchanger (3) is communicated with tap water through a pipeline, a heat exchange liquid outlet of the heat energy exchanger (3) is connected with a water washing device (11) and/or a material melting device (12) through a pipeline, and the water washing device (11) is connected with the first solid-liquid separator (2).
7. The special wastewater recycling system for textile pretreatment according to claim 5 or 6, wherein the material dissolving device (12) is filled with tea saponin, and the material dissolving device (12) is connected with the pretreatment device (1).
8. The special wastewater recycling system for textile pretreatment according to claim 1, wherein the first solid-liquid separator (2) and the second solid-liquid separator (6) are both drum filters, and brush rollers are arranged in the first solid-liquid separator (2) and the second solid-liquid separator (6).
9. The special wastewater recycling system for textile pretreatment according to claim 1, wherein the pretreatment device (1) is a steaming device or a boiling device.
10. The special wastewater recycling system for textile pretreatment according to claim 1, wherein a pH tester is arranged on the acid titration tank (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110080860.0A CN112744974A (en) | 2021-01-21 | 2021-01-21 | Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110080860.0A CN112744974A (en) | 2021-01-21 | 2021-01-21 | Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112744974A true CN112744974A (en) | 2021-05-04 |
Family
ID=75652749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110080860.0A Pending CN112744974A (en) | 2021-01-21 | 2021-01-21 | Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112744974A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1765779A (en) * | 2005-09-02 | 2006-05-03 | 浙江大学 | Printing and dyeing wastewater recovery and disposal method |
| CN103304071A (en) * | 2013-07-08 | 2013-09-18 | 青岛德泰线业有限公司 | Printing and dyeing wastewater heat energy recovery and anti-dirty treatment method |
| CN108373241A (en) * | 2018-04-17 | 2018-08-07 | 苏州迪维勒普信息科技有限公司 | Textile waste online monitoring system |
| CN207738547U (en) * | 2017-11-02 | 2018-08-17 | 孚日集团股份有限公司 | A kind of wastewater recycling system of yarn fabric pre-treatment |
| CN108658304A (en) * | 2018-06-20 | 2018-10-16 | 浙江鑫广环保科技有限公司 | A kind of dyeing and printing sewage step decontamination processing system and processing method |
| CN110040933A (en) * | 2019-05-22 | 2019-07-23 | 刘届 | Sewage zero-discharge lining cloth preprocessing system |
| CN214270581U (en) * | 2021-01-21 | 2021-09-24 | 上海金堂轻纺新材料科技有限公司 | Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment |
-
2021
- 2021-01-21 CN CN202110080860.0A patent/CN112744974A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1765779A (en) * | 2005-09-02 | 2006-05-03 | 浙江大学 | Printing and dyeing wastewater recovery and disposal method |
| CN103304071A (en) * | 2013-07-08 | 2013-09-18 | 青岛德泰线业有限公司 | Printing and dyeing wastewater heat energy recovery and anti-dirty treatment method |
| CN207738547U (en) * | 2017-11-02 | 2018-08-17 | 孚日集团股份有限公司 | A kind of wastewater recycling system of yarn fabric pre-treatment |
| CN108373241A (en) * | 2018-04-17 | 2018-08-07 | 苏州迪维勒普信息科技有限公司 | Textile waste online monitoring system |
| CN108658304A (en) * | 2018-06-20 | 2018-10-16 | 浙江鑫广环保科技有限公司 | A kind of dyeing and printing sewage step decontamination processing system and processing method |
| CN110040933A (en) * | 2019-05-22 | 2019-07-23 | 刘届 | Sewage zero-discharge lining cloth preprocessing system |
| CN214270581U (en) * | 2021-01-21 | 2021-09-24 | 上海金堂轻纺新材料科技有限公司 | Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103332821B (en) | Vitriolated method of wastewater treatment in a kind of dye well intermediate production process | |
| CN201037204Y (en) | Water-saving energy-reducing water processing system for color dyeing machine | |
| CN107352727B (en) | Method for realizing zero discharge of coal chemical industry wastewater | |
| CN101570316A (en) | Method and device for refining and recycling hydrochloric acid from hydrochloric acid pickling waste liquid | |
| CN101294775B (en) | Heat reclamation method for wastewater of dyeing and printing industry | |
| CN214270581U (en) | Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment | |
| CN103058408B (en) | Power generation industries waste water recycling device method and treatment for reuse system | |
| CN104445771A (en) | Catalytic oxidation evaporation recovery system for mercerizing waste alkali liquid of yarn-dyed fabric | |
| CN101948220B (en) | Method for treating printing and dyeing wastewater | |
| CN104213356B (en) | A kind of textile dyeing water treatment system | |
| CN101905894A (en) | Method for recycling waste alkali liquor | |
| CN108126362A (en) | A kind of light alkali evaporation equipment of multistage and mercerizing diluting alkali recovery system | |
| CN202490504U (en) | Purification recovery device of mercerizing waste alkali liquor | |
| CN112744974A (en) | Regeneration and cyclic utilization system for special wastewater generated in textile pretreatment | |
| CN209522604U (en) | One kind being directed to mercerization recycle of alkali liquor mechanical recompression vapour system | |
| CN207941217U (en) | A kind of light alkali evaporation equipment of multistage and mercerizing diluting alkali recovery system | |
| CN203821114U (en) | Bleaching and dyeing hot water circulating system | |
| CN204198542U (en) | A kind of evaporation of the catalyzed oxidation for yarn-dyed fabric mercerized waste alkali liquid recovery system | |
| CN101748576A (en) | Waste water recycling pad dyeing long machine and waste water recycling method thereof | |
| CN206109122U (en) | Hydrochloric acid pickling waste water processing system | |
| CN201785542U (en) | Special combined equipment for internal circulation electroplating process | |
| CN204919046U (en) | Printing and dyeing water saving system | |
| CN207091712U (en) | Printing and dyeing mill's water circulation system | |
| CN201321549Y (en) | Pad dyeing lathe for recycling wastewater | |
| CN102417270A (en) | Printing and dyeing wastewater treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |