CN203269712U - Zero discharge treatment device for heavy metal wastewater - Google Patents
Zero discharge treatment device for heavy metal wastewater Download PDFInfo
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- CN203269712U CN203269712U CN 201320318575 CN201320318575U CN203269712U CN 203269712 U CN203269712 U CN 203269712U CN 201320318575 CN201320318575 CN 201320318575 CN 201320318575 U CN201320318575 U CN 201320318575U CN 203269712 U CN203269712 U CN 203269712U
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Abstract
The utility model discloses a zero discharge treatment device for heavy metal wastewater. According to a heavy metal wastewater treatment process, the device is sequentially provided with an electrochemical pretreatment dechelate pool, a pH adjustment pool, a tube microfiltration system, a pH callback pool, a reverse osmosis system and an MVR (Mechanical Vapor Recompression) evaporator, in the process of treatment, medicaments are required to be added in the pH adjustment pool, the tube microfiltration system and the pH callback pool, and no medicament is required to be added in the other equipment, therefore, the treatment device disclosed by the utility model can realize the zero discharge of heavy metal wastewater, and compared with the prior art, the treatment device disclosed by the utility model is not only short in treatment process and few in equipment, and save about 20% of equipment investment, but also saves about 80% of added medicaments; moreover, the service life of the tube microfiltration system adopted in the utility model is twice as long as the service life of an ultrafiltration system in the traditional process, and compared with a multi-effect evaporator in the traditional process, the MVR evaporator adopted in the utility model is more energy-saving.
Description
Technical field
The utility model belongs to the technical field of waste water processing of environmental engineering, is specifically related to a kind for the treatment of unit of heavy metal wastewater thereby.
Background technology
The main flow process of technique of zero discharge of existing heavy metal wastewater thereby, undertaken by following treatment scheme:
A, heavy metal wastewater thereby first carry out advanced oxidation after collecting, the effect of advanced oxidation is mainly contact break, because after heavy metal and complexing agent complexing, are not easy precipitation, so could removal heavy metal after necessary contact break.Present high-level oxidation technology is mainly Fenton process or the little electrolysis of iron charcoal etc., all needs to add a large amount of medicaments.
After B, advanced oxidation, coagulating sedimentation is carried out in water outlet, by adding liquid caustic soda and heavy metal ion to form precipitation of hydroxide, by adding polymeric aluminium chlorohydroxide (PAC), polyacrylamide (PAM), make the oxyhydroxide of generation be reacted into macrobead, be beneficial to precipitation and remove.
After C, coagulating sedimentation, the pH readjustment is carried out in water outlet, is beneficial to and enters follow-up ultrafiltration and RO(reverse osmosis) system.After the pH readjustment, water outlet enters sand filtration, charcoal is filtered system, removes the fine particle in waste water, is beneficial to and enters ultrafiltration system.
D, charcoal filtrate enter ultrafiltration system, and the ultrafiltration system water outlet enters the RO system again and concentrates, and the dense water that the RO system produces enters multiple-effect evaporator, carries out evaporation concentration, and outside concentrated solution committee, Condensate reuse is in production.
As from the foregoing, the technique of zero discharge treatment scheme of existing heavy metal wastewater thereby is long, and facility investment is high, and chemical feeding quantity is many, and chemical feeding quantity is unfavorable for subsequent ultrafiltration, RO system also causing water outlet conductivity high simultaneously more, is unfavorable for producing water reuse, also the running cost of increase.
The utility model content
In order to overcome defects, the utility model provides a kind of heavy metal wastewater thereby zero discharge treatment device, this heavy metal wastewater thereby zero discharge treatment device has shortened treatment scheme greatly, reduced facility investment, add hardly simultaneously medicament, save and want reagent cost, alleviate follow-up impact on the RO system, improve and produce water water quality, service life of equipment is long, save energy.
The utility model for the technical scheme that solves its technical problem and adopt is:
a kind of heavy metal wastewater thereby zero discharge treatment device, be provided with successively electrochemical pre-treatment contact break pond according to the heavy metal containing wastewater treatment flow process, the pH regulator pond, tubular type micro-filtration (DF) system, pH adjusts back the pond, reverse osmosis (RO) system and MVR(mechanical vapor recompression) vaporizer, wherein, described electrochemical pre-treatment contact break pond water outlet connects described pH regulator pond water-in by pipeline, described pH regulator pond water outlet connects described tubular type microfiltration systems water-in by pipeline, described tubular type microfiltration systems water outlet connects described pH by pipeline and adjusts back the pond water-in, described pH readjustment pond water-in connects described reverse osmosis system water-in by pipeline, described reverse osmosis system has dense water water outlet and produces the water water outlet, the dense water water outlet of described reverse osmosis system connects described MVR vaporizer water-in, the product water water outlet of described reverse osmosis system is connected with the first reuse pipe, described MVR vaporizer has condensate outlet and concentrated solution outlet, the condensate outlet of described MVR vaporizer is connected with the second reuse pipe.
The beneficial effects of the utility model are: heavy metal wastewater thereby zero discharge treatment device of the present utility model is provided with successively electrochemical pre-treatment contact break pond, pH regulator pond, tubular type microfiltration systems, pH according to the heavy metal containing wastewater treatment flow process and adjusts back pond, reverse osmosis system and MVR vaporizer, in treating processes, need to need to add a small amount of NaOH in the pH regulator pond, add active carbon powder in the tubular type microfiltration systems, adjust back at pH and add a small amount of H in the pond
2SO
4Do not need to add medicament in all the other equipment, therefore treatment unit of the present utility model not only can be realized the heavy metal wastewater thereby zero release, and, compared to prior art, the utility model not only treatment scheme is short, equipment is few, save facility investment approximately 20%, and save adding of agent approximately 80%, moreover be a times of ultrafiltration system work-ing life in traditional technology the work-ing life of the tubular type microfiltration systems that adopts in the utility model, and the MVR vaporizer that adopts in the utility model is than the save energy more of the multiple-effect evaporator in traditional technology.
Description of drawings
Fig. 1 is principle schematic of the present utility model.
Embodiment
Below by specific specific examples explanation embodiment of the present utility model, those of ordinary skills understand advantage of the present utility model and effect easily by content disclosed in the present specification.
embodiment: a kind of heavy metal wastewater thereby zero discharge treatment device, be provided with successively electrochemical pre-treatment contact break pond 1 according to the heavy metal containing wastewater treatment flow process, pH regulator pond 2, tubular type micro-filtration (DF) system 3, pH adjusts back pond 4, reverse osmosis (RO) system 5 and MVR(mechanical vapor recompression) vaporizer 6, wherein, described electrochemical pre-treatment contact break pond 1 water outlet connects described pH regulator pond 2 water-ins by pipeline, described pH regulator pond 2 water outlets connect described tubular type microfiltration systems 3 water-ins by pipeline, described tubular type microfiltration systems 3 water outlets connect described pH by pipeline and adjust back pond 4 water-ins, described pH readjustment pond 4 water-ins connect described reverse osmosis system 5 water-ins by pipeline, described reverse osmosis system 5 has dense water water outlet and produces the water water outlet, the dense water water outlet of described reverse osmosis system 5 connects described MVR vaporizer 6 water-ins, the product water water outlet of described reverse osmosis system 5 is connected with the first reuse pipe 7, described MVR vaporizer 6 has condensate outlet and concentrated solution outlet, the condensate outlet of described MVR vaporizer 6 is connected with the second reuse pipe 8.
The treatment step that uses above-mentioned heavy metal wastewater thereby zero discharge treatment device to carry out heavy metal containing wastewater treatment is as follows:
A, electrochemical pre-treatment contact break: heavy metal wastewater thereby is introduced into electrochemical pre-treatment contact break pond 1 and carries out electrochemical pre-treatment after collecting, complete contact break by the hydroxyl radical free radical that electrochemical pre-treatment produces;
B, pH adjust: after the contact break of steps A electrochemical pre-treatment, water outlet enters in pH regulator pond 2, adds a small amount of NaOH and carry out pH and adjust in pH regulator pond 2, makes heavy metal and NaOH reaction generation precipitation of hydroxide, and this process need not add PAC, PAM;
C, tubular type microfiltration systems filter: after the pH of step B adjusts, water outlet enters tubular type micro-filtration (DF) system 3, add active carbon powder in the tubular type microfiltration systems, precipitation of hydroxide by active carbon powder adsorption step B generation, active carbon powder can adsorb chlorine residue and COD simultaneously, and the vast scale circulating filtration by the tubular type microfiltration systems, active carbon powder after absorption is separated, thereby removal heavy metal, active carbon powder not only adsorbs precipitation of hydroxide, simultaneously the pollutents such as chlorine residue, COD can also be adsorbed, the subsequent disposal load can be alleviated.DF system long service life, chemically-resistant cleans.
D, pH readjustment: after step C tubular type microfiltration systems filtered, water outlet entered pH and adjusts back pond 4, adjusted back in pond 4 at pH and added H
2SO
4Carry out the pH readjustment;
E, after the pH of step D readjustment, water outlet directly enters reverse osmosis (RO) system 5, the product water of reverse osmosis (RO) system is by the first reuse pipe 7 reuses, the dense water of reverse osmosis (RO) system enters MVR(mechanical vapor recompression) vaporizer 6, the phlegma that the MVR vaporizer produces is by the second reuse pipe 8 reuses, the outer processing of concentrated solution committee that MVR vaporizer 6 produces, the MVR vaporizer is than traditional multiple-effect evaporator save energy more.
Claims (1)
1. heavy metal wastewater thereby zero discharge treatment device, it is characterized in that: be provided with successively electrochemical pre-treatment contact break pond (1) according to the heavy metal containing wastewater treatment flow process, pH regulator pond (2), tubular type microfiltration systems (3), pH adjusts back pond (4), reverse osmosis system (5) and MVR vaporizer (6), wherein, described electrochemical pre-treatment contact break pond (1) water outlet connects described pH regulator pond (2) water-in by pipeline, described pH regulator pond (2) water outlet connects described tubular type microfiltration systems (3) water-in by pipeline, described tubular type microfiltration systems (3) water outlet connects described pH by pipeline and adjusts back pond (4) water-in, described pH readjustment pond (4) water-in connects described reverse osmosis system (5) water-in by pipeline, described reverse osmosis system (5) has dense water water outlet and produces the water water outlet, the dense water water outlet of described reverse osmosis system (5) connects described MVR vaporizer (6) water-in, the product water water outlet of described reverse osmosis system (5) is connected with the first reuse pipe (7), described MVR vaporizer (6) has condensate outlet and concentrated solution outlet, the condensate outlet of described MVR vaporizer (6) is connected with the second reuse pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320318575 CN203269712U (en) | 2013-06-04 | 2013-06-04 | Zero discharge treatment device for heavy metal wastewater |
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| CN 201320318575 CN203269712U (en) | 2013-06-04 | 2013-06-04 | Zero discharge treatment device for heavy metal wastewater |
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| CN 201320318575 Expired - Lifetime CN203269712U (en) | 2013-06-04 | 2013-06-04 | Zero discharge treatment device for heavy metal wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708668A (en) * | 2013-12-27 | 2014-04-09 | 太仓华辰净化设备有限公司 | Method for treating purified terephthalic acid mother liquor wastewater |
| CN105692992A (en) * | 2016-01-27 | 2016-06-22 | 苏州得润环保科技有限公司 | Recycling and disposal system for nickel-containing wastewater |
| CN109019959A (en) * | 2018-08-09 | 2018-12-18 | 中国电子系统工程第二建设有限公司 | A kind of processing unit of strong complex state heavy metal wastewater thereby and its discharge and reuse technology |
-
2013
- 2013-06-04 CN CN 201320318575 patent/CN203269712U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708668A (en) * | 2013-12-27 | 2014-04-09 | 太仓华辰净化设备有限公司 | Method for treating purified terephthalic acid mother liquor wastewater |
| CN103708668B (en) * | 2013-12-27 | 2016-01-13 | 苏州华辰净化股份有限公司 | A kind for the treatment of process of mother solution of pure terephthalic acid waste water |
| CN105692992A (en) * | 2016-01-27 | 2016-06-22 | 苏州得润环保科技有限公司 | Recycling and disposal system for nickel-containing wastewater |
| CN105692992B (en) * | 2016-01-27 | 2019-04-02 | 苏州得润环保科技有限公司 | A kind of nickel-containing waste water recovery and processing system |
| CN109019959A (en) * | 2018-08-09 | 2018-12-18 | 中国电子系统工程第二建设有限公司 | A kind of processing unit of strong complex state heavy metal wastewater thereby and its discharge and reuse technology |
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Granted publication date: 20131106 |
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| CX01 | Expiry of patent term |