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Treatment method of high-salt-content organic wastewater

A technology for organic wastewater and treatment methods, which is applied in seawater treatment, water/sewage treatment, water treatment parameter control, etc., and can solve problems such as clogging and salt deposition.

Pending Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the characteristics of high-salt organic wastewater, the present invention combines ebullating bed reactor and supercritical water oxidation technology to treat it, can realize efficient removal of salt and COD, and solves the deposition of salt in reactor and pipeline and clogging issues

Method used

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  • Treatment method of high-salt-content organic wastewater

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Effect test

Embodiment 1

[0030] Adopt the present invention to attach figure 1 In the process shown, in the high-salt organic wastewater, the COD concentration is 92600mg / L, the TDS is 13.5wt%, and the pH is 8.5.

[0031] Pass high-salt organic wastewater and oxygen into the ebullating bed reactor, wherein the solid particles in the ebullating bed reactor are alumina ceramic balls with a diameter of 0.4mm and a bulk density of 0.65g / cm 3 , the specific surface area is 260m 2 / g, the amount of solid particles added is 1 / 2 of the reactor volume. The amount of oxidant introduced is 300% of the theoretical oxygen demand for wastewater oxidation. The conditions of the supercritical oxidation are as follows: the reaction temperature is 600° C., the reaction pressure is 28 MPa, and the reaction residence time is 30 seconds. The amount of solid particles added and discharged during the reaction is 75g h -1 ·L -1 进水. The salt in the wastewater is deposited on the solid particles of the fluidized bed rea...

Embodiment 2

[0034] Adopt the present invention to attach figure 1 In the process shown, in the highly saline organic wastewater, the COD concentration is 21700mg / L, the TDS is 5.3wt%, and the pH is 8.

[0035] Pass high-salt organic wastewater and oxygen into the ebullating bed reactor, wherein the solid particles in the ebullating bed reactor are alumina ceramic balls with a diameter of 0.2mm and a bulk density of 0.67g / cm 3 , the specific surface area is 100m 2 / g, the amount of solid particles added is 1 / 3 of the reactor volume. The amount of oxidant introduced is 150% of the theoretical oxygen demand for wastewater oxidation. The conditions of the supercritical oxidation are as follows: the reaction temperature is 380° C., the reaction pressure is 23 MPa, and the reaction residence time is 150 seconds. The amount of solid particles added and discharged during the reaction is 58g h -1 ·L -1 进水 . The salt in the wastewater is deposited on the solid particles of the fluidized bed ...

Embodiment 3

[0038] Adopt the present invention to attach figure 1 In the process shown, in the high-salt organic wastewater, the COD concentration is 137200mg / L, the TDS is 14.3wt%, and the pH is 8.7.

[0039] Pass high-salt organic wastewater and oxygen into the ebullating bed reactor, wherein the solid particles in the ebullating bed reactor are alumina ceramic balls with a diameter of 0.7mm and a bulk density of 0.62g / cm 3 , the specific surface area is 300m 2 / g, the amount of solid particles added is 1 / 2 of the reactor volume. The amount of oxidant introduced is 350% of the theoretical oxygen demand for wastewater oxidation. The conditions of the supercritical oxidation are as follows: the reaction temperature is 650° C., the reaction pressure is 30 MPa, and the reaction residence time is 30 seconds. The amount of solid particles added and discharged during the reaction is 79g h -1 ·L -1 进水 . The salt in the wastewater is deposited on the solid particles of the fluidized bed r...

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Abstract

The invention relates to a treatment method of high-salt-content organic wastewater, which comprises the following steps: introducing the high-salt-content organic wastewater and an oxidant into a fluidized bed reactor, reacting under supercritical water oxidation conditions, depositing salt in the wastewater onto solid particles in the fluidized bed reactor, and carrying out gas-liquid separationon the reacted material to satisfy the discharge requirements. According to the characteristics of the high-salt-content organic wastewater, a fluidized bed reactor and a supercritical water oxidation technology are combined to treat the high-salt-content organic wastewater, so that salt and COD can be efficiently removed, and the problems of deposition and blockage of the salt in the reactor andpipelines are solved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection wastewater treatment, and in particular relates to a treatment method for high-salt organic wastewater. Background technique [0002] High-salinity organic wastewater refers to wastewater containing organic matter and total dissolved solids TDS (Total Dissolved Solid) mass fraction ≥ 3.5%. And contains a large number of refractory substances and bioinhibitory substances. Some industrial industries, such as oil extraction, printing and dyeing, papermaking, pharmaceutical and chemical industries, have a salt content of about 15%-25% and contain high concentrations of refractory organic matter. The environmental pollution caused by high-salt organic wastewater is very serious. If it is discharged directly without treatment, it will inevitably cause great harm to aquatic organisms, domestic drinking water, and industrial and agricultural production water. [0003] At present, the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/74C02F101/30
CPCC02F1/72C02F1/727C02F1/74C02F2101/30C02F2209/08C02F2209/02C02F2209/03C02F2209/06C02F2201/002C02F1/66Y02A20/124Y02A20/131C02F1/58B01J8/003B01J8/008B01J8/08B01J2208/00805B01J2208/0084C02F1/5209C02F1/5236C02F1/5263C02F2103/08
Inventor 周彤方向晨郭宏山杨涛蒋广安孟兆会
Owner CHINA PETROLEUM & CHEM CORP
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