CN209890428U - Harmless treatment system for printing and dyeing high-concentration wastewater - Google Patents
Harmless treatment system for printing and dyeing high-concentration wastewater Download PDFInfo
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- CN209890428U CN209890428U CN201920554609.1U CN201920554609U CN209890428U CN 209890428 U CN209890428 U CN 209890428U CN 201920554609 U CN201920554609 U CN 201920554609U CN 209890428 U CN209890428 U CN 209890428U
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Abstract
The utility model discloses a printing and dyeing high enriched waste water innocent treatment system, this system are including ozone oxidation equipment, Fenton treatment facility, filtration equipment, electrodialysis equipment and the evaporation crystallization equipment that connects gradually, ozone oxidation equipment include ozone generator and ozone reaction tower, filtration equipment contain sand filtration device and security filter device. The utility model has the advantages of high water recovery rate, no harmful material emission and the like, and opens up a brand-new technical approach for the harmless treatment of high COD high-salinity wastewater after the treatment of printing and dyeing industry wastewater by a membrane method.
Description
Technical Field
The utility model belongs to the industrial wastewater treatment field, concretely relates to printing and dyeing high-concentration wastewater innocent treatment system.
Background
With the continuous development of the industry in China, the environmental pollution concentration and the wastewater discharge amount of the printing and dyeing industry show a rising trend, andcorrespondingly, the predicament of water resource shortage in China is achieved, in order to relieve the predicament of water resource shortage and reduce pollution of printing and dyeing wastewater to the environment, more and more printing and dyeing industries adopt membrane separation technology to treat the printing and dyeing wastewater, the obtained product water is used as reuse water, the usage amount of fresh water is reduced, and the purpose of emission reduction is achieved. However, because the printing and dyeing wastewater contains high concentration of salt and COD, the reuse rate of the printing and dyeing wastewater is about 90%, and 10% of concentrated water needs to be discharged, the TDS content in the concentrated water exceeds 22000mg/L and contains a large amount of inorganic salt (Cl)-、SO4 2-、Na+、Ca2+Plasma) with the COD content of 450-600mg/L, wherein the high-salt and high-COD printing and dyeing high-concentration wastewater is concentrated wastewater after biochemical treatment, the contained salts are complex and the organic matters are all refractory organic matters, the high-concentration wastewater is difficult to treat by single treatment methods such as electrodialysis, ozone oxidation, evaporative crystallization and the like, and the high-concentration wastewater is directly discharged into the environment and causes serious pollution and damage to the environment. Therefore, the harmless treatment of the printing and dyeing high-concentration wastewater is increasingly becoming one of the research hotspots for wastewater treatment.
Chinese patent CN104803448A discloses a forward osmosis treatment method for high-salinity high-organic-matter-concentration wastewater, which comprises a wastewater concentration process and a drawing liquid regeneration process, and adopts a multi-stage evaporation technology as a drawing liquid regeneration method. However, the forward osmosis membrane still has the problems of low retention rate of certain pollutants, large concentration polarization in the support layer, high cost, high energy consumption of the absorption liquid in the recovery process, poor regeneration effect and the like.
Chinese patent CN109205872A discloses a high-salt and high-COD wastewater treatment system, which takes electrodialysis, evaporative crystallization and degradation units as cores, filtered wastewater enters electrodialysis, obtained concentrated water enters a crystallization system after flocculation, and fresh water of the electrodialysis enters the degradation units for treatment. However, the process wastewater directly enters the electrodialysis equipment without a COD degradation process, organic matters in the wastewater can pollute an electrodialysis membrane in an electrodialysis treatment process, so that the electrodialysis treatment is incomplete, the salt content in desalted water is high, the organic matters in the fresh water after the oxidation treatment can not reach the standard after the oxidation treatment can not be degraded, and secondary pollutants can be generated by flocculation.
Chinese patent CN109052796A discloses a high-salt high-COD wastewater treatment zero-emission process and device, which comprises an ultrafiltration device, an electrodialysis device, a reverse osmosis device, an oxidation treatment device and a low-temperature evaporation device, wherein ultrafiltration effluent enters the electrodialysis device to obtain strong brine and high-COD fresh water, the strong brine is subjected to low-temperature evaporation crystallization, and the fresh water enters the reverse osmosis device after the oxidation treatment. The process flow is complicated, the ultrafiltration and the reverse osmosis are realized, the high-salt and high-COD wastewater subjected to the ultrafiltration enters the electrodialysis, the electrodialysis membrane is polluted, the treatment capacity of the electrodialysis is influenced, the salt content in the strong brine subjected to the electrodialysis is not high enough, part of organic matters can be carried, the purity of the obtained inorganic salt is low, the evaporation equipment can be damaged, and the service life is shortened. Chinese patent CN104445786A discloses a treatment process of high-concentration salt-containing wastewater, which mainly comprises core devices such as a disc tube reverse osmosis membrane, electrodialysis, membrane distillation and the like, wherein the salt-containing wastewater is concentrated through the disc tube reverse osmosis, concentrated water enters the electrodialysis, and electrodialysis concentrated solution enters the membrane distillation for further concentration, so that the obtained concentrated solution enters a crystallizer for treatment. But disc tube reverse osmosis membrane has certain limitation to salt content and organic matter content of intaking, the organic matter content is high aggravates membrane pollution and osmotic pressure and risees, increase the operation degree of difficulty and cost, concentrated dense water contains higher salinity and COD, directly get into the electrodialysis and can cause the strong brine to carry partly organic matter that can the ionization, bring the influence to follow-up membrane distillation process, not only can influence the efficiency of membrane distillation, still can reduce life, the crystallization mother liquor that the system produced at last can not handle, can only regard as the useless processing of danger, the inorganic salt purity that the crystallization came out is low.
Disclosure of Invention
An object of the utility model is to provide a high enriched wastewater treatment system of printing and dyeing and method, to the innocent treatment demand of concentrated water after present printing and dyeing wastewater membrane method is handled, have the water rate of recovery height, no harmful material advantage such as discharges, this high enriched wastewater innocent treatment system of printing and dyeing has better social and market competition.
In order to achieve the above purpose, the utility model discloses a solution does:
a printing and dyeing high-concentration wastewater harmless treatment system comprises an ozone oxidation device, a Feton treatment device, a filtering device, an electrodialysis device and an evaporation crystallization device which are sequentially connected.
Further, the ozone oxidation device comprises an ozone generator and an ozone reaction tower, an ozone outlet of the ozone generator is connected with an ozone inlet of the ozone reaction tower, and a water outlet of the ozone reaction tower is connected with a water inlet of the Feton treatment device.
Further, the filtering equipment comprises a sand filtering device and a security filter device.
Further, the ion exchange membrane used by the electrodialysis apparatus is a homogeneous membrane.
Further, the evaporative crystallization equipment is multi-effect evaporative crystallization equipment.
The utility model discloses a printing and dyeing high enriched waste water innocent treatment system's theory of operation: the printing and dyeing high-concentration wastewater is from a concentrated solution obtained after membrane treatment of the printing and dyeing wastewater, and is firstly introduced into an ozone oxidation device for ozone oxidation treatment, then the treated water enters a Fenton treatment system for secondary oxidation treatment, the high-concentration wastewater after the Fenton treatment passes through a sand filter device and a security filter device to remove large-particle impurities in the high-concentration wastewater, then enters an electrodialysis device for desalination treatment, and finally the concentrated solution after desalination treatment enters an evaporation crystallization device for evaporation crystallization to obtain inorganic salts, and condensed water generated in the evaporation process is recycled.
When the ozone oxidation equipment carries out ozone oxidation treatment, the printing and dyeing high-concentration wastewater CODCrAnd after the concentration is reduced to 210-260mg/L, the high-concentration wastewater subjected to ozone oxidation treatment enters Fenton treatment equipment for further oxidation treatment.
When the high-concentration wastewater COD in the Feton treatment equipment isCrWhen the content is 20-40mg/L, the oxidized high-concentration wastewater enters a filtering device.
When the salt content of the dilute brine generated when the electrodialysis device carries out desalination treatment is less than 10000mg/L, the generated dilute brine returns to the membrane treatment system again.
And when the salt content of the concentrated solution in the electrodialysis equipment is more than 150000mg/L, the desalted concentrated solution enters an evaporative crystallization equipment for evaporative crystallization.
Has the advantages that: the utility model treats partial COD by the ozone oxidation equipmentCrAnd the salt content in the wastewater is kept unchanged, and then COD is treated by Fenton treatment equipmentCrReducing the concentration of the wastewater to 20-40mg/L, desalting the high-concentration wastewater passing through the filtering device in an electrodialysis device until the salt content of the dilute brine is less than 10000mg/L, returning the dilute brine of the electrodialysis device to the membrane method system for re-desalting, and evaporating and crystallizing the concentrated solution of the electrodialysis device in an evaporation crystallization device to obtain high-purity inorganic salt, wherein the condensed water generated in the evaporation process is recycled, so that the maximum utilization of resources is achieved. The utility model has the advantages of high water recovery rate, no harmful substance emission and the like, and has better social benefit and market competitiveness. Furthermore, the utility model discloses solved effectively that waste water does not lead to the fact the electrodialysis to cause the pollution to the membrane through the direct entering of COD degradation process, and the desalination water treatment is incomplete, a series of problems such as organic matter degradation is not up to standard in the fresh water after oxidation treatment.
Drawings
FIG. 1 is a schematic structural diagram of the harmless treatment of the printing and dyeing high-concentration wastewater of the utility model.
Detailed Description
For further explanation of the technical solution of the present invention, the present invention is explained in detail by the following specific embodiments:
as shown in the attached figure 1, the harmless treatment system for the printing and dyeing high-concentration wastewater comprises an ozone oxidation device 1, a Fenton treatment device 2, a filtering device 3, an electrodialysis device 4 and an evaporation crystallization device 5 which are sequentially connected, wherein the ozone oxidation device comprises an ozone generator and an ozone reaction tower, the filtering device comprises a sand filtering device and a safety filter device, an ozone outlet of the ozone generator is connected with an ozone inlet of the ozone reaction tower, and a water outlet of the ozone reaction tower is connected with a water inlet of the Fenton treatment device. The ion exchange membrane in the electrodialysis equipment is a homogeneous membrane, and the evaporation crystallization equipment is multi-effect evaporation crystallization equipment.
In particular to a harmless part for applying the printing and dyeing high-concentration wastewaterThe treatment system is used for treating the printing and dyeing high-concentration wastewater treated by a membrane method in a biochemical factory: the salt content of the high-concentration printing and dyeing wastewater is 22000-25000mg/L, CODCrIs 460-550mg/L, wherein the concentration is Ca2+≤330mg/L，SO4 2-Concentration is less than or equal to 16130mg/L, Cl-The concentration is less than or equal to 450mg/L, K+Concentration is less than or equal to 250mg/L, Na+The concentration is less than or equal to 7800 mg/L.
The utility model discloses a printing and dyeing high enriched waste water innocent treatment system's theory of operation:
(1) the printing and dyeing high-concentration wastewater obtained after membrane treatment firstly enters ozone oxidation equipment 1 for ozone oxidation treatment, and part of COD is removed through ozone oxidation treatmentCrIs 210-260 mg/L.
(2) The printing and dyeing high-concentration wastewater after ozone oxidation enters a Fenton treatment device 2 for secondary oxidation treatment, and the printing and dyeing high-concentration wastewater COD after secondary oxidationCrIs 20-40 mg/L.
(3) The printing and dyeing high-concentration wastewater subjected to the Feton secondary oxidation treatment enters a filtering device 3, and the printing and dyeing high-concentration wastewater ss treated by the filtering device meets the water inlet requirement of the electrodialysis equipment.
(4) And (3) enabling the high-concentration wastewater passing through the filtering device to enter an electrodialysis device 4 for desalination treatment, and returning to the membrane system for treatment when the salt content of the desalted weak brine is less than 10000 mg/L.
(5) And finally, when the salt content of the concentrated solution in the electrodialysis equipment is more than 150000mg/L, the concentrated solution subjected to electrodialysis desalination treatment enters an evaporation crystallization device 5 for evaporation crystallization to obtain high-purity inorganic salt, and condensed water generated in the evaporation crystallization process is recycled.
The above-mentioned embodiments and drawings are only used for explaining the present invention, and are not intended to limit the present invention, and any modifications, equivalent exchanges, improvements, etc. made by the present invention fall within the scope of the present invention within the spirit of the present invention and the scope of the claims.
Claims (5)
1. The utility model provides a printing and dyeing high enriched waste water innocent treatment system which characterized in that: comprises an ozone oxidation device, a Fenton treatment device, a filtering device, an electrodialysis device and an evaporation crystallization device which are connected in sequence.
2. The printing and dyeing high-concentration wastewater harmless treatment system according to claim 1, characterized in that: the ozone oxidation equipment comprises an ozone generator and an ozone reaction tower, an ozone outlet of the ozone generator is connected with an ozone inlet of the ozone reaction tower, and a water outlet of the ozone reaction tower is connected with a water inlet of the Fenton treatment equipment.
3. The printing and dyeing high-concentration wastewater harmless treatment system according to claim 1, characterized in that: the filtering equipment comprises a sand filtering device and a safety filtering device.
4. The harmless treatment system for printing and dyeing high-concentration wastewater according to claim 1, characterized in that: the ion exchange membrane used by the electrodialysis equipment is a homogeneous membrane.
5. The harmless treatment system for printing and dyeing high-concentration wastewater according to claim 1, characterized in that: the evaporative crystallization equipment is multi-effect evaporative crystallization equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920554609.1U CN209890428U (en) | 2019-04-23 | 2019-04-23 | Harmless treatment system for printing and dyeing high-concentration wastewater |
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| CN201920554609.1U CN209890428U (en) | 2019-04-23 | 2019-04-23 | Harmless treatment system for printing and dyeing high-concentration wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293130A (en) * | 2018-09-17 | 2019-02-01 | 大丰跃龙化学有限公司 | A kind of integrated conduct method of triazines organic wastewater |
| CN109896685A (en) * | 2019-04-23 | 2019-06-18 | 泉州师范学院 | A kind of printing and dyeing hc effluent innocuity disposal system and method |
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2019
- 2019-04-23 CN CN201920554609.1U patent/CN209890428U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293130A (en) * | 2018-09-17 | 2019-02-01 | 大丰跃龙化学有限公司 | A kind of integrated conduct method of triazines organic wastewater |
| CN109896685A (en) * | 2019-04-23 | 2019-06-18 | 泉州师范学院 | A kind of printing and dyeing hc effluent innocuity disposal system and method |
| CN109896685B (en) * | 2019-04-23 | 2024-03-05 | 泉州师范学院 | Printing and dyeing high-concentration wastewater harmless treatment system and method |
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