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Catalysis wet-type oxidation treatment method for sulfur-containing wastewater

A technology that catalyzes wet oxidation and treatment methods. It is applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, and chemical/physical processes. It can solve problems such as complex processes and low COD removal rates, and achieve simple process flow and reduced toxicity. , to avoid the inhibitory effect

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problems of biological inhibition, low COD removal rate and complex process in the treatment of sulfur-containing wastewater in the prior art, and a new catalytic wet oxidation treatment method for sulfur-containing wastewater is provided

Method used

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  • Catalysis wet-type oxidation treatment method for sulfur-containing wastewater
  • Catalysis wet-type oxidation treatment method for sulfur-containing wastewater
  • Catalysis wet-type oxidation treatment method for sulfur-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] 2 g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 30ml water to make solution I, and 98 grams of 20-80 mesh TiO 2 Carrier impregnation solution I, dried at 100°C for 12 hours, and calcined at 600°C for 5 hours to obtain catalyst precursor I; 1.5 g of anhydrous RuCl 3 Dissolved in 30ml of water to form solution II, impregnated solution II with the prepared catalyst precursor I, dried at 80°C for 24 hours, and calcined at 700°C for 4 hours to obtain a catalyst.

[0010] Using the catalyst prepared above to treat Na 2 Wastewater with sulfur content of 45g / l in the form of S and COD of 100,000mg / l, in a fixed bed reactor, at a reaction temperature of 260°C, a reaction pressure of 7.0MPa, and a liquid space velocity of 2.0 hours -1 , Oxygen and wastewater react under the condition that the volume ratio is 150:1 under the standard state, the COD removal rate is 97.5%, and the sulfur that exists with sulfate ion in the wastewater after the reaction is 45g / l.

Embodiment 2～17

[0012] The preparation method is the same as in Example 1, only the raw materials, component ratio and preparation conditions are changed. The prepared catalyst is shown in Table 1, and the reaction results are shown in Table 2.

Embodiment 18～26

[0014] The catalyst prepared in Example 5 was adopted, but the reaction conditions were changed, and the specific results are shown in Table 3.

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Abstract

The invention relates to a catalysis wet-type oxidation treatment method for sulfur-containing wastewater, which is mainly used for solving the problems of biological inhibition, not high removal rate of COD (chemical oxygen demand) and complex technique for treating sulfur-containing wastewater. In the method, industrial wastewater of which the COD value is 2000mg / l to 200000mg / l and the sulfur content is less than 70g / l and gases containing elemental oxygen are taken as raw materials which are in contact with a catalyst under the conditions that the reaction temperature is 230 to 300 DEG C, the reaction pressure is 3 to 10MPa, the liquid space velocity is 0.5 to 2.5h<-1> and the volume ratio in a standard state of the gas and liquid materials is (70-300):1, and therefore, the removal rate of the COD is larger than 95% and sulfurs in the wastewater are all converted into sulfate ions, wherein the catalyst comprises at least one oxide carrier selected from TiO2, Al2O3, SiO2 or ZrO2 and at least one metal or oxide carried on the oxide carrier and selected from Pt, Pd, Ru, Ir or Rh in parts by weight. The problems are nicely solved with the technical scheme, and the catalysis wet-type oxidation treatment method for sulfur-containing wastewater can be used in the industrial treatment of sulfur-containing industrial wastewater.

Description

technical field [0001] The invention relates to a catalytic wet oxidation treatment method for sulfur-containing wastewater. Background technique [0002] For wastewater containing organic pollutants, biochemical treatment is a simple and economical method, but if the wastewater contains toxic and harmful substances to biological bacteria, it is difficult to directly treat it with biochemical treatment. Excessive sulfides in wastewater can strongly inhibit anaerobic processes. The anti-sulfurization process of reducing sulfate to sulfide competes with the methanogenic process for the hydrogen removed from organic non-oxidation, and soluble sulfide will directly inhibit the function of bacterial cells, reducing the population of methanogenic bacteria. When the sulfur content exceeds When the concentration is 200mg / L, the inhibitory effect is very obvious, so that the organic pollutants in the wastewater cannot be effectively removed by biological methods. Wet oxidation is a...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J23/644B01J23/652B01J23/58B01J23/44B01J23/46B01J23/648B01J23/63B01J23/42
Inventor 汪国军宋卫林姚全明奚美珍
Owner CHINA PETROLEUM & CHEM CORP
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