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Mixed desalination method and device for wastewater

A wastewater and salinity technology, applied in chemical instruments and methods, water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of export influence, accumulation of solid particles, blockage, etc.

Active Publication Date: 2013-07-10
ENN ENVIROTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 2. The installation of the cooler coil inside the demineralizer will affect the export of slag water containing inorganic salts, and may cause blockage in severe cases;
[0008] 3. The part of the slag outlet is flat, and this structure is very easy to cause the accumulation of solid particles;
[0009] 4. The filtering effect of the single-layer filter baffle is poor;
[0010] 5. The desalter cannot resist the corrosion of corrosive factors such as inorganic salts and the erosion and abrasion of solid particles

Method used

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  • Mixed desalination method and device for wastewater
  • Mixed desalination method and device for wastewater
  • Mixed desalination method and device for wastewater

Examples

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Effect test

example 1

[0084] Referring to the first row of data in the above table, in this example, the conductivity of the raw wastewater is 25906S / m, and the filler 6 in the mixed desalination device uses spherical TiO with a diameter of 6mm 2 and spherical ZrO with a diameter of 10 mm 2 Mix filler. After pressurized preheating, the temperature of the raw wastewater reaches 320°C and the pressure reaches 25MPa. At this time, the raw wastewater is in a subcritical state. The oxidant is liquid oxygen, and the amount of liquid oxygen is 1% of the oxygen consumption of the organic matter contained in the wastewater. The liquid oxygen is pressurized, gasified and preheated, and the pressure reaches 25.5-27.5MPa, and the temperature reaches 300°C. Subcritical raw material wastewater and oxidant enter from the top material inlet 1 and oxidant inlet 14 of the device respectively, and are mixed through the baffle plate 2 and the nozzle 13, and the heat of oxidation reaction occurs, and the temperature o...

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Abstract

The invention provides a desalination pretreatment method and device for raw wastewater before entering a reactor. The device and the method are as below: raw wastewater is mixed with a small amount of an oxidizer; the temperature is adjusted to a supercritical state; and the salt components are separated. Most salts dissolved in the raw wastewater can be removed through the device and the method provided by the invention to prevent clogging of a subsequent supercritical water treatment system for raw wastewater. Besides, a corrosion resistant / abrasion resistant lining can be arranged to realize corrosion / abrasion resistant effect, so as to prolong the service life of the device.

Description

technical field [0001] The invention relates to a mixed desalination method and device for waste water, and the method and device can be especially used in the fields of large-scale industrial application of supercritical water technology and the like. Background technique [0002] High-salt wastewater will be generated in the production process of dyestuff, pesticide, medicine, petrochemical and other industries. After preliminary desalination treatment, supercritical water treatment can be carried out to purify the wastewater to meet the discharge standard. [0003] In addition, supercritical water (Supercritical Water, SCW: the temperature is above 374°C and the pressure is above 22.1MPa) has completely different physical and chemical properties from normal temperature and pressure water and subcritical water, typical such as large specific heat capacity, heat transfer coefficient High, large diffusion coefficient, high ion product, low viscosity, small dielectric consta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/58
Inventor 程乐明张玉宝王青赵晓谷蔚谷俊杰曹雅琴宋成才宋庆峰
Owner ENN ENVIROTECH CO LTD
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