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Treatment method and treatment system for methanol-containing high-salinity wastewater

A treatment method and technology for high-salt wastewater, applied in water/sewage treatment, multi-stage water/sewage treatment, heating water/sewage treatment, etc., can solve the problems of difficult high-salt wastewater treatment and large footprint, and achieve operational The effect of low cost, small footprint and simple process flow

Pending Publication Date: 2020-04-03
GUANGDONG YEANOVO ENVIRONMENTAL PROTECTION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this stage, although most of the membrane concentration-MVR evaporation devices reduce energy consumption and save operating costs, they occupy a large area and are difficult to treat high-salt wastewater with complex components (mainly high-salt wastewater containing organic matter) wastewater) for treatment

Method used

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  • Treatment method and treatment system for methanol-containing high-salinity wastewater
  • Treatment method and treatment system for methanol-containing high-salinity wastewater

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1. Methanol-containing high-salt wastewater treatment system

[0032] Such as figure 2 As shown, the methanol-containing high-salt wastewater treatment system of the present invention includes: a primary distillation system 1, an ultrafiltration system 2 connected to the water outlet of the primary distillation system, a nanofiltration system 3 connected to the ultrafiltration system water production tank, and a nanofiltration system connected to the nanofiltration system. The MVR system 4 connected to the concentrated water tank of the system. The nanofiltration water production tank of the nanofiltration system is connected with a secondary distillation system 5 for methanol recovery. All monomer systems are connected by pipelines. Among them, the various inlet and outlet pipelines related to MVR evaporation and two-stage distillation are connected by titanium tubes, while ultrafiltration and nanofiltration systems are connected by stainless steel pipeli...

Embodiment 2

[0038] Embodiment 2, the method for treating methanol-containing high-salt wastewater using the above-mentioned treatment system

[0039] Process flow diagram as figure 1 , the water quality characteristics of methanol-containing high-salt wastewater in the figure are: total salt concentration 12000mg / L, COD 10000mg / L, the treatment steps are as follows:

[0040] Step 1) Primary distillation: methanol-containing high-salt wastewater enters the primary distillation system for distillation treatment, removes part of the methanol in the wastewater, and obtains primary distillation product water; wherein, the distillation temperature is 75°C, and the distillation time is 120min. The total salt concentration of the produced water is 12000mg / L, and the COD is 40mg / L;

[0041] Step 2) ultrafiltration: the above-mentioned first-stage distilled water is subjected to ultrafiltration through an ultrafiltration system to remove particulate matter to obtain ultrafiltration water; wherein ...

Embodiment 3

[0045] Embodiment 3, the method of using the above-mentioned treatment system to treat methanol-containing high-salt wastewater

[0046] Process flow diagram as figure 1 , the water quality characteristics of methanol-containing high-salt wastewater in the figure are: total salt concentration 8000mg / L, COD 7500mg / L, the treatment steps are as follows:

[0047] Step 1) Primary distillation: methanol-containing high-salt wastewater enters the primary distillation system for distillation treatment, removes part of the methanol in the wastewater, and obtains primary distillation product water; wherein, the distillation temperature is 75°C, and the distillation time is 120min. The total salt concentration of the produced water is 8000mg / L, and the COD is 32mg / L;

[0048] Step 2) ultrafiltration: the above-mentioned first-stage distilled water is subjected to ultrafiltration through an ultrafiltration system to remove particulate matter to obtain ultrafiltration water; wherein the ul...

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Abstract

The invention discloses a treatment method and treatment system for methanol-containing high-salinity wastewater, wherein the treatment method comprises the following steps: A) carrying out distillation treatment on the methanol-containing high-salinity wastewater through a distillation system I to obtain primary distillation produced water; B) carrying out ultrafiltration treatment on the primarydistillation produced water through an ultrafiltration system to obtain ultrafiltration produced water; C) carrying out nanofiltration treatment on the ultrafiltration produced water by a nanofiltration system, and separating inorganic salt from residual methanol to obtain nanofiltration produced water containing high-concentration methanol and nanofiltration concentrated water; and D) enabling the nanofiltration concentrated water to enter an MVR system, and evaporating to obtain condensed water and crystalline salt. According to the treatment method provided by the invention, zero emissionof the high-salinity wastewater containing organic matters can be realized, salt and methanol in the wastewater are recycled, and the whole process flow is simple. In addition, the treatment system provided by the invention is small in occupied area and low in energy consumption, can be used for treating high-salinity wastewater with complex components, does not need to add any medicament, and islow in operation cost.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method and system for methanol-containing high-salt wastewater. Background technique [0002] High-salt wastewater refers to wastewater with a salt concentration ≥ 1%, which has a certain toxic effect on the environment, mainly from high-salt wastewater discharged or advanced treatment by power plants, chemical and other production enterprises. It mainly has the following characteristics: first, the total dissolved solid content in the wastewater is high; second, the concentration of ions that are prone to scaling in the wastewater is high; third, the alkalinity in the wastewater is high. [0003] At present, the treatment method for high-salt wastewater is mainly evaporation method, which can realize the separation of brine in high-salt wastewater and reuse high-purity distilled water. However, the early single-effect evaporation technology ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F9/00C02F1/04C02F1/444C02F1/442
Inventor 韩全张恒
Owner GUANGDONG YEANOVO ENVIRONMENTAL PROTECTION CO LTD
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