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Supercritical water oxidation treatment system of high-salt content corrosive organic wastewater

A technology for supercritical water oxidation and organic wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as corrosion and salt deposition, and achieve large-scale flow regulation , low equipment investment and low operating costs

Inactive Publication Date: 2014-11-05
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-efficiency and low-cost supercritical water oxidation treatment system by adopting a special continuous supply method of gas oxidant to solve the problems of corrosion and salt deposition in the treatment of high-salt and highly corrosive organic wastewater

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  • Supercritical water oxidation treatment system of high-salt content corrosive organic wastewater

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Embodiment Construction

[0017] refer to figure 1 As shown, a supercritical water oxidation treatment system for highly saline corrosive organic wastewater includes a storage tank 1 , a clean water tank 9 , an evaporation wall water tank 21 and a cooling water tank 32 . The outlet of material storage box 1 (with stirring pump 2) is connected to the inlet of high-pressure plunger pump 3, the outlet of high-pressure plunger pump 3 is connected to the inlet of material preheater 7, and the outlet of material preheater 7 is connected to the inlet of mixer 25 end connection. The outlet of the clean water tank 9 is connected to the inlet of the first high-pressure clean water pump 10 , and the outlet of the first high-pressure clean water pump 10 is connected to the inlet of the first supercharger 11 . The outlet of the first supercharger 11 is connected to the inlet of the gas oxidant preheater 18 , and the outlet of the gas oxidant preheater 18 is connected to the inlet of the mixer 25 . The other outle...

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Abstract

The invention discloses a supercritical water oxidation treatment system of high-salt content corrosive organic wastewater. Through the arrangement of an evaporating wall-type reactor, a reflowing tank-type reactor and corresponding shut-off valves, the evaporating wall-type reactor or the reflowing tank-type reactor can be flexibly selected for working, thus effectively solving blockage problems caused by corrosion and salt deposition during the treatment of the high-salt content corrosive organic wastewater; additionally, through the arrangement of a clear water tank, a first high-pressure clear water pump, a second high-pressure clear water pump, a first pressurizer, a second pressurizer, an oxygen bottle and a nitrogen bottle, continuous supply and flow regulation of oxygen required by the supercritical water oxidation treatment system can be achieved; compared with a high-pressure compressor, the supercritical water oxidation treatment system of the high-salt content corrosive organic wastewater is low in equipment investment and low in working cost, and can be widely applied to a harmless treatment process of the high-salt content corrosive organic wastewater.

Description

technical field [0001] The invention relates to waste water harmless treatment technology, in particular to a method for treating highly salty (inorganic salt content 5-10 wt%) and highly corrosive (chloride ion concentration 1000-5000 mg / L) organic waste water by supercritical water oxidation system. Background technique [0002] Supercritical water (T>374.15℃, P>22.12MPa) is a special state of water. It has only a small amount of hydrogen bonds, has high diffusion coefficient and low viscosity, and its dielectric constant is similar to that of polar organic solvents. Oxygen, Organic matter is miscible with supercritical water, and inorganic salts have very low solubility in supercritical water and are easily separated. Supercritical water oxidation technology (SCWO for short) utilizes the special properties of supercritical water. Under the premise of providing sufficient oxidant, organic matter undergoes a homogeneous reaction in an oxygen-enriched environment to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10
Inventor 徐东海王树众唐兴颖张洁郭洋钱黎黎
Owner XI AN JIAOTONG UNIV
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