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Method for simultaneously removing sulfur dioxide from flue gas and organic pollutant from waste water

A technology for organic pollutants and sulfur dioxide, which is applied in the fields of water pollutants, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve the problems of increasing operating costs and increasing investment, and achieve the effect of simple process flow

Inactive Publication Date: 2018-06-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, sulfate / sulfite free radicals mainly rely on the disproportionation of persulfate in the presence of photocatalysts. Therefore, this photocatalytic technology needs to add a large amount of persulfate, which increases operating costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: the concentration of organic pollutants (sulfonamide antibiotics) in the waste water containing organic pollutants in this embodiment is 1000mg / L;

[0019] (1) The photocatalyst (the photocatalyst is TiO 2 ) was added to the wastewater containing organic pollutants and mixed uniformly to obtain a mixed aqueous solution system; in which, per liter of organic wastewater, the photocatalyst (TiO 2 ) is added in an amount of 100mg;

[0020] (2) Under the condition of light (1000W xenon lamp as the light source), the exhaust gas containing sulfur dioxide is passed into the mixed aqueous solution obtained in step (1) at a uniform speed, and the pH of the reaction system is controlled by an alkaline substance (the alkaline substance is CaO) Value is 6, and reaction 90min obtains desulfurization gas and purified water; Among them, with every liter of organic wastewater, the amount of waste gas containing 450mg / L sulfur dioxide is 0.3L; Concentration is 189mg / L, g...

Embodiment 2

[0021] Embodiment 2: the concentration of organic pollutants (sulfonamide antibiotics) in the waste water containing organic pollutants in this embodiment is 1000mg / L;

[0022] (1) The photocatalyst (the photocatalyst is TiO 2 ) was added to the wastewater containing organic pollutants and mixed uniformly to obtain a mixed aqueous solution system; in which, per liter of organic wastewater, the photocatalyst (TiO 2 ) is added in an amount of 500mg;

[0023] (2) Under the condition of light (1000W xenon lamp as the light source), pass the exhaust gas containing sulfur dioxide into the mixed aqueous solution system obtained in step (1) at a uniform speed, and use the alkaline substance (the alkaline substance is Ca(OH) 2 ) Control the pH value of the reaction system to be 8, and react for 90 minutes to obtain desulfurized gas and purified water; wherein, based on each liter of organic wastewater, the amount of waste gas containing 2000mg / L sulfur dioxide is 1.5L; liquid chromato...

Embodiment 3

[0024] Embodiment 3: the concentration of organic pollutants (sulfonamide antibiotics) in the waste water containing organic pollutants in this embodiment is 1000mg / L;

[0025] (1) The photocatalyst (the photocatalyst is TiO 2 ) was added to the wastewater containing organic pollutants and mixed uniformly to obtain a mixed aqueous solution system; in which, per liter of organic wastewater, the photocatalyst (TiO 2 ) is added in an amount of 800mg;

[0026] (2) Under the condition of light (1000W xenon lamp as the light source), the exhaust gas containing sulfur dioxide is passed into the mixed aqueous solution obtained in step (1) at a uniform speed, and the pH of the reaction system is controlled by alkaline substances (the alkaline substance is NaOH) Value is 10, and reaction 180min obtains desulfurization gas and purified water; Wherein, with every liter of organic wastewater, the amount of waste gas containing 3700mg / L sulfur dioxide is 2.5L; Concentration is 288mg / L, ga...

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Abstract

The invention relates to a method for simultaneously removing sulfur dioxide from flue gas and organic pollutant from waste water, and belongs to the technical field of environmental protection and comprehensive utilization. The method comprises the steps of: adding a photocatalyst into the waste water which contains the organic pollutant, and performing even mixing to obtain a mixed aqueous solution system; and introducing the sulfur dioxide-containing flue gas into the mixed aqueous solution system at a constant speed, controlling the pH value of the reaction system at 6-10 by using alkalinematter, and performing a reaction for 60-180 minutes to obtain gas without sulfur and water without the organic pollutant. Through the method, sulfur dioxide in the flue gas and the organic pollutantin the waste water can be removed simultaneously, so that waste control by waste is achieved.

Description

technical field [0001] The invention relates to a method for simultaneously removing sulfur dioxide in flue gas and organic pollutants in waste water, and belongs to the technical field of environmental protection and comprehensive utilization. Background technique [0002] With the rapid development of industry and agriculture in our country, water pollution is becoming more and more serious, especially the organic pollution of water, which has seriously affected the safety of water supply and the quality of drinking water in our country. Organic pollutants in water mainly include antibiotics, personal care products, endocrine disruptors, pesticides, etc. These pollutants have endocrine disrupting activity and triple effects, seriously affecting ecological security and human health. Therefore, it is urgent to develop efficient and feasible organic pollution wastewater treatment technology. [0003] Photocatalytic oxidation is a new water treatment technology developed in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/66C02F1/72B01D53/86B01D53/50C02F101/30C02F101/38
CPCB01D53/8609C02F1/30C02F1/66C02F1/725C02F2305/10C02F2305/023C02F2101/38C02F2101/40C02F2101/30B01D2255/2073B01D2255/20738B01D2255/20746B01D2255/20707B01D2255/2096B01D2259/80B01D2258/0283B01D2255/802
Inventor 李英杰房岐石凤丽田森林刘相良赵群黄建洪胡学伟宁平
Owner KUNMING UNIV OF SCI & TECH
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