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Process and equipment for purifying waste water containing organic pollutants by continuous homogenization and optical oxidization

A technology of organic pollutants and photo-oxidation, which is applied in oxidation water/sewage treatment, illumination water/sewage treatment, energy and waste water treatment, etc. It can solve the problem of inconvenient separation and recovery of catalysts, inconvenient continuous industrial operation, and large reactor area. and other problems, to achieve the effect of small footprint, low cost and fast response

Inactive Publication Date: 2003-10-08
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the inconvenient continuous industrial operation, low catalytic efficiency, inconvenient separation and recovery of catalyst, high catalyst cost, and reactor occupation when purifying wastewater containing organic pollutants in conventional heterogeneous and homogeneous photooxidation reactions. The shortcomings of large area and difficult operation and management provide an advanced homogeneous photooxidation method capable of continuous operation, effective degradation of waste water containing organic pollutants and high removal of cleanliness, and related equipment needed for this

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  • Process and equipment for purifying waste water containing organic pollutants by continuous homogenization and optical oxidization
  • Process and equipment for purifying waste water containing organic pollutants by continuous homogenization and optical oxidization
  • Process and equipment for purifying waste water containing organic pollutants by continuous homogenization and optical oxidization

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Embodiment 1

[0050] The method for continuous homogeneous photooxidative purification of waste water containing organic pollutants of the present invention is as follows:

[0051] Under normal temperature and pressure, the water to be treated is pre-filtered by the filter F to remove suspended solids, and the filtrate flows into the regulator V1, and the pH value of the water to be treated is adjusted to 2-3 by acid or alkali 2; from the regulator V1 The water to be treated enters the mixer V2 and the photocatalyst and hydrogen peroxide 3 that enter from the upper part of the mixer V2 are based on the weight of the photocatalyst: the weight of the water to be treated=10 -7 : 1~10 -2 : 1 and hydrogen peroxide weight: water weight to be treated=10 -6 : 1~10 -1 : 1 ratio mixing. After mixing, the water to be treated containing photocatalyst and hydrogen peroxide enters the combined photoreactor R from the feed port 8 at the lower left side of the combined photoreactor R through the deliver...

Embodiment 2

[0054] The device used in the method for continuous homogeneous photocatalytic purification of wastewater containing organic pollutants of the present invention

[0055] prepare, such as figure 1 , figure 2 shown, including

[0056] A filter F is a general filter device;

[0057] A regulator V1, for the general storage tank;

[0058] a mixer V2, which is equipped with a mechanical stirring device;

[0059] A transfer pump P, which transfers the material in the mixer to the combination photoreactor R.

[0060] The filter F, the regulator V1, the mixer V2, and the delivery pump P are connected by pipelines, and their positional relationship can ensure smooth fluid flow.

[0061] A combined photoreactor R is square in shape and upright, with a height / width ratio of 1:10 to 10:1. The combined photoreactor R is divided into four parts by the partition plate 17 to form four independent single photoreactors, respectively R1, R2, R3, R4. Each single photoreactor R1, R2, R3, R4 i...

Embodiment 3

[0070] The combined photocatalytic reactor (R) has a total volume of 30 liters and a square appearance. The interior is divided into four single reactors called R1, R2, R3, and R4, and their effective volumes are 9, 8, 7, 6 liters. Wastewater containing acid red G dye was selected as the water to be treated. Which contains acid red G concentration of 10 -3 M, the chemical oxygen demand CODcr before degradation is 1900mg / L, and the total organic carbon TOC is 374.5mg / L. The water to be treated is pre-filtered by the filter (F) to remove larger suspended solids, the filtrate flows into the regulator (V1), and sulfuric acid is added to adjust the pH value of the water to be treated to 2.5; the to-be-treated water from the regulator (V1) The treated water enters the mixer (V2) and is mixed with the photocatalyst and hydrogen peroxide (3) entering from the upper part of the mixer (V2). -4 : 1, the weight ratio of hydrogen peroxide (weight percentage concentration is 30%) and was...

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Abstract

A process for purifying the waste water containing organic pollutant by homonized optical oxidation reaction includes such steps as pre-filtering, regulating pH value, mixing with photocatalyst and H2O2, pumping into combined photoreactor composed of 2-20 single photoreactors, and pumping compressed air into said photoreactors for stirring while radiating it with artificial light source and sunlight to degradate and mineralize organic pollutant. Its advantages are less possessed ground area, simple operation, high degradation efficiency, low cost and no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of homogeneous advanced photooxidation, in particular to a method and equipment for purifying wastewater containing organic pollutants through continuous homogeneous advanced photooxidation. Background technique [0002] In recent years, great progress has been made in the research of semiconductor heterogeneous photocatalysts and their basic applications. Many semiconductor materials, such as titanium dioxide, tin dioxide, zinc oxide, and cadmium sulfide, have been found to generate electron-hole pairs under light conditions. , and then generate OH and OOH radicals. Holes and the above two free radicals have super-strong oxidizing ability, and can almost oxidize and degrade most organic matter and mineralize them into water and carbon dioxide. Such as "Journal of Physical Chemistry" 1992, volume 96, page 2226 of H.Hidaka, Zhao Jincai et al.'s article "anion sodium dodecylbenzene sul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/32C02F1/72
CPCY02W10/37
Inventor 赵进才张天永
Owner INST OF CHEM CHINESE ACAD OF SCI
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