Method and system apparatus for treating high-salt volatile organic wastewater

A volatile organic and organic wastewater technology, applied in water/sewage treatment, chemical instruments and methods, heating water/sewage treatment, etc., can solve problems such as excessive organic residues and affect the degradation of organic matter, shorten the process flow, and ensure water quality. , the effect of shortening the processing process

Inactive Publication Date: 2019-11-19
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the presence of inorganic salts, it may cause free radicals to interact with Cl - , CO 3 2- 、HCO 3 - Quenching, etc., affects the degradation of organic matter, and there are many organic matter residues

Method used

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  • Method and system apparatus for treating high-salt volatile organic wastewater
  • Method and system apparatus for treating high-salt volatile organic wastewater

Examples

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Effect test

Embodiment 1

[0041] A gas-liquid two-phase synchronous oxidation method for treating high-salt volatile organic wastewater, the steps are as follows:

[0042] (1) Obtain the pretreated organic wastewater, and the SS (suspended solids) in the wastewater is lower than 10mg / L;

[0043] (2) Pump organic waste water, acid conditioner and alkali conditioner into the pipeline mixer, control the initial pH of waste water to be 4, in order to improve the formation of sulfuric acid free radicals and reduce the formation of carbonate scaling;

[0044] (3) Transfer the mixed liquid in the pipeline mixer to the evaporation reactor, control the evaporation temperature to 60°C, use the evaporation heat to activate persulfate to speed up the reaction rate, and at the same time reduce the possibility of equipment fouling and the overflow of volatile organic compounds ;

[0045] (4) According to the COD Cr with S 2 o 8 2- Pump the persulfate with a mass fraction of 4.5% into the evaporation reactor wit...

Embodiment 2

[0049] A gas-liquid two-phase synchronous oxidation method for treating high-salt volatile organic wastewater, the steps are as follows:

[0050] (1) Pretreatment of high-salt volatile organic wastewater, so that the SS (suspended solids) in the wastewater is lower than 10mg / L; the pretreatment method can be treated by membrane, coagulation, or filtration . Membrane treatment, coagulation or filtration methods are conventional wastewater pretreatment methods.

[0051] (2) pump organic waste water, acid conditioner and alkali conditioner into pipeline mixer, and control the initial pH of waste water to be 4.5;

[0052] (3) According to the COD Cr with S 2 o 8 2- Mass concentration ratio is that the ratio of 4.5 is the persulfate that the persulfate radical massfraction is pumped into evaporation reactor;

[0053] (4) Transport the mixed liquid in the pipeline mixer to the evaporation reactor, and control the evaporation temperature to be 65°C;

[0054] (5) Mix and react ...

Embodiment 3

[0057] A gas-liquid two-phase synchronous oxidation method for treating high-salt volatile organic wastewater, the steps are as follows:

[0058] (1) Pretreat high-salt volatile organic wastewater so that the SS (suspended solids) in the wastewater is lower than 10mg / L;

[0059] The pretreatment method can be treated by membrane, coagulation, or filtration, which makes the treatment method a conventional wastewater pretreatment method.

[0060] (2) pump organic waste water, acid conditioner and alkali conditioner into pipeline mixer, and control the initial pH of waste water to be 5;

[0061] (3) Transport the mixed liquid in the pipeline mixer to the evaporation reactor, and control the evaporation temperature to 70°C;

[0062] (4) At the same time follow the COD Cr with S 2 o 8 2- A mass concentration ratio of 4 to 5 is used to pump persulfate with a mass fraction of persulfate radicals of 5.5% into the evaporation reactor;

[0063] (5) Mix and react the evaporated ste...

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Abstract

The invention provides a method and a system apparatus for treating high-salt volatile organic wastewater, and belongs to the field of wastewater treatment. The method includes the following steps: pretreating the high-salt volatile organic wastewater; pumping the pretreated wastewater, an acid regulator and an alkali regulator into a pipeline mixer to control the concentration of hydrogen ions inthe wastewater; conveying a mixed liquid in the pipeline mixer into an evaporation reactor, and controlling the addition mode of a persulfate, the evaporation temperature and the evaporation time; mixing the evaporated steam with ozone, allowing the obtained mixture to go through a condensing device, introducing the condensed mixture to condensate water in order to secondarily degrade volatile organic compounds; and purifying reacted exhaust gas, introducing the purified exhaust gas into the evaporation reactor for reuse, and allowing distilled water obtained after the reaction to be used ascondensate water or discharged. The method and the system apparatus realize the gas-liquid two-phase synchronous oxidation in the evaporation process of high-salt volatile organic wastewater, greatlyshorten the treatment process flow and improve the utilization rate of resources, and make the obtained distilled water completely meet reuse and discharge standards.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method and a system device for treating high-salt volatile organic wastewater, and is especially suitable for the treatment of shale gas fracturing flowback fluid. Background technique [0002] High-salt volatile organic wastewater refers to the total salt content greater than 1%, containing a large amount of K + 、Na + , Ca + , SO 4 2- , Cl - , CO 3 2- And other free inorganic ions, also contains a large number of organic components, such as phthalic acid, formaldehyde, medium and low carbon alkanes, etc., which are characterized by complex components, toxicity, odor, large chroma, and poor biochemical properties. The main source of this type of wastewater is the high brine produced by petrochemical, coal chemical, pharmaceutical, printing and dyeing production processes and other wastewater treatment processes such as electrodialysis, nanofiltration membrane,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/30
CPCC02F9/00C02F1/66C02F1/722C02F1/04C02F1/78C02F2101/30
Inventor 王兵施斌任宏洋张欢熊明洋文天祥
Owner SOUTHWEST PETROLEUM UNIV
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