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Salt-containing wastewater treatment system and treatment process thereof

A salt-containing wastewater treatment system technology, applied in water/sewage treatment, water treatment parameter control, water/sewage multi-stage treatment, etc. The service life of fouling blockage and other issues can reduce the risk of fouling blockage, reduce COD, and improve the treatment effect.

Pending Publication Date: 2021-06-29
SCIMEE TECH & SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a salt-containing wastewater treatment system and a treatment process to solve the problems of the current membrane concentration + evaporation crystallization treatment process that the roll-type membrane has a large processing load, the treatment effect of high-salt wastewater is poor, and it is easy to cause membrane fouling and use. The problem of greatly shortened lifespan, and achieve the purpose of combining with oxidation technology to form a new process suitable for high-salt wastewater treatment

Method used

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  • Salt-containing wastewater treatment system and treatment process thereof
  • Salt-containing wastewater treatment system and treatment process thereof
  • Salt-containing wastewater treatment system and treatment process thereof

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Embodiment 1

[0030] Please refer to figure 1 As shown, the embodiment of the present invention discloses a saline wastewater treatment system. The disclosed saline wastewater treatment system includes an electrodialysis device and an electrocatalytic oxidation device; The water end is connected, and the electrodialysis device is used for the electrodialysis separation of salty wastewater, and the separated electrodialysis desalinated water is sent to the electrocatalytic oxidation device for electrocatalytic oxidation treatment.

[0031] Among them, firstly, the electrodialysis device is driven by an external electric field to separate and treat the saline wastewater by using the selective permeability of the ion exchange membrane, so as to obtain the electrodialysis concentrated water containing salt and the electrodialysis desalination water containing organic matter. The removal of salt in saline wastewater, and the removal effect of salt is better than that of reverse osmosis membrane;...

Embodiment 2

[0040] Based on the saline wastewater treatment system in Example 1; correspondingly, the embodiment of the present invention discloses a saline wastewater treatment process; wherein, taking the wastewater produced by a coal chemical plant as an example, the COD concentration is about 800mg / L, The concentration of ammonia nitrogen is about 200 mg / L; specifically, the following processing steps are included:

[0041] Biochemical treatment step: transport the wastewater to be treated to a biochemical treatment device for pretreatment, so that the COD concentration in the wastewater can be reduced to about 80mg / L through biochemical reactions;

[0042] Magnetic coagulation sedimentation treatment steps: transport the wastewater pretreated by biochemical reaction to the magnetic coagulation sedimentation device for magnetic coagulation sedimentation treatment to further reduce the content of COD and total suspended solids; among them, in the process of magnetic coagulation sediment...

Embodiment 3

[0048] Please refer to figure 2 and image 3 As shown, the embodiment of the present invention discloses an electrocatalytic oxidation device, which is applicable to the saline wastewater treatment system and treatment process disclosed in the present invention.

[0049] The electrocatalytic oxidation treatment device disclosed in the embodiment of the present invention includes at least two electrolytic cells 100 arranged in parallel between the main water inlet 200 and the main water outlet 300, and the main water inlet 200 is connected to the main water outlet 300 through the electrolytic cell 100, namely The water inlet end of each electrolytic cell 100 is respectively connected with the water inlet main pipe 200, and the water outlet end of each electrolytic cell 100 is respectively connected with the water outlet main pipe 300; meanwhile, the water inlet main pipe 200 is used for connecting the water outlet end of the magnetic coagulation sedimentation device, The wast...

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Abstract

The invention discloses a salt-containing wastewater treatment system and a treatment process thereof. Wherein the salt-containing wastewater treatment system comprises an electrodialysis device and an electrocatalytic oxidation device; the desalination separation water outlet end of the electrodialysis device is connected with the water inlet end of the electrocatalytic oxidation device; the treatment process comprises the following steps: conveying to-be-treated salt-containing wastewater to an electrodialysis device for electrodialysis separation treatment to obtain electrodialysis concentrated water and electrodialysis desalted water; and conveying the electrodialysis desalinated water separated in the electrodialysis treatment step to an electrocatalytic oxidation device for electrocatalytic oxidation treatment to remove organic matters in the electrodialysis desalinated water. According to the scheme, the problems of large spiral-wound membrane treatment load, poor high-salt-content wastewater treatment effect, easiness in causing membrane pollution and blockage and great shortening of the service life in the existing membrane concentration and evaporative crystallization treatment process can be solved, and the aim of forming a new process suitable for high-salt-content wastewater treatment by combining with an oxidation technology is fulfilled.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a salty waste water treatment system and a treatment process. Background technique [0002] The existing high-concentration saline wastewater mainly adopts the treatment process of membrane concentration + evaporation crystallization in order to meet the discharge standards; however, the composition of the concentrated solution after multi-stage membrane concentration is complex, and the COD concentration can reach more than 10 times that of the influent , the salt content is also extremely high, which in turn leads to not only a huge processing load on the existing roll-type membrane process in wastewater with high salt content and high COD concentration, but also organic matter fouling on the membrane surface, affecting the membrane performance. Water flux requires repeated cleaning, and it is very easy to cause fouling of the membrane and greatly shorten the serv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F9/12C02F101/10C02F101/30
CPCC02F9/00C02F1/4693C02F1/441C02F1/4672C02F1/488C02F1/048C02F2101/10C02F2101/30C02F2209/08C02F2209/10C02F2209/14C02F3/00
Inventor 季泓西杨治清王哲晓肖波易洋
Owner SCIMEE TECH & SCI CO LTD
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