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Device and method for processing waste water with high COD concentration through catalytic wet oxidation

A catalytic wet oxidation, high-concentration technology, applied in the direction of oxidized water/sewage treatment, etc., can solve the problem of harsh catalytic wet oxidation reaction conditions, and achieve good market prospects

Active Publication Date: 2013-04-17
SICHUAN YUECHENG ENVIRONMENTAL PROTECTION & ENERGY SAVING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for catalytic wet oxidation treatment of high-concentration COD wastewater, overcome the deficiencies of the prior art, solve the problem of harsh catalytic wet oxidation reaction conditions, and enable the reaction to be realized under relatively mild working conditions. At the same time, further improve the efficiency of pollutant treatment

Method used

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  • Device and method for processing waste water with high COD concentration through catalytic wet oxidation

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Experimental program
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Effect test

Embodiment 1

[0019] Catalytic wet oxidation technology is used to treat high-concentration COD wastewater. The COD value of wastewater is 17000mg / L, the reaction temperature is 150°C, the oxygen partial pressure is 1Mpa, and the volume ratio of gas-liquid raw materials is 15:1 in the standard state. Ferric sulfate is used as the condition. Catalyst, with Fe 3+ Calculate its catalyst dosage to be 0.006mol / L.

[0020] The specific operation steps are: 1) After the catalyst is completely dissolved in the wastewater, add it from the top of the reactor, start the magnetic pump to make the wastewater circulate in the reaction device, and then pass the oxygen into the reaction system through the control of the deceleration valve, when the whole system When the internal oxygen partial pressure is 1Mpa, stop the oxygen supply, start the heating device and the temperature controller to ensure that the temperature in the system reaches 150°C, stop the temperature rise and maintain the reaction temper...

Embodiment 2

[0023] In the test of using catalytic wet oxidation technology to treat high-concentration COD wastewater, the COD value of wastewater is 17,000mg / L, the reaction temperature is 130°C, the partial pressure of oxygen is 0.5Mpa, and the volume ratio of gas-liquid raw materials is 10:1 in the standard state. Copper as a catalyst, by Cu 2+ The catalyst dosage is calculated to be 0.06 mol / L. The treatment method was the same as in Example 1, and the results showed that after 1.5h, the COD of the effluent was 870 mg / L, and the removal rate reached 94.88%, and its BOD 5 / COD cr Improved from 0.19 to 0.8.

Embodiment 3

[0025] In the test of using catalytic wet oxidation technology to treat high-concentration COD wastewater, the COD value of wastewater is 17,000mg / L, the reaction temperature is 110°C, the partial pressure of oxygen is 0.25Mpa, and the volume ratio of gas-liquid raw materials is 12:1 in the standard state. Manganese as a catalyst, with Mn 2+ The catalyst dosage is calculated to be 0.05 mol / L. The treatment method was the same as in Example 1, and the results showed that after 2.5 hours, the COD of the effluent was 978 mg / L, and the removal rate reached 93.57%, and its BOD 5 / COD cr From 0.19 to 0.74.

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Abstract

The invention relates to the technical field of processing of organic waste water in environmental conservation, in particular to a device and a method for processing waste water with high COD (Chemical Oxygen Demand) concentration through catalytic wet oxidation. The method is characterized in that transition metal salt is taken as reaction catalyst, an air and liquid mixer is adopted in a reaction system so as to realize the cyclic utilization of oxidizing gases, reaction is performed under the temperature of 110 to 150 DEG C and the oxygen tension of 0.25 to 1 MPa, the reaction time is 1.5 to 2.5 hours, under the standard state, the volume ratio of the oxygen and the waste water is (10 to 15):1, and the dosage of the catalyst ranges from 0.006-0.06 mol / L as per the ratio of moles of the transition metal ions and the waste water volume. The transition metal salt is one of copper sulfate, diiron trisulfate, ferrous sulfate, manganese sulfate and cobalt acetate. Compared with the prior art, the invention has the advantages of mild reaction conditions, low reaction temperature, lowered gas tension, and more than 90% of removal rate of COD in waste water.

Description

technical field [0001] The invention relates to the technical field of environmental protection organic wastewater treatment, in particular to a device and method for catalytic wet oxidation treatment of high-concentration COD wastewater. Background technique [0002] With the rapid development of petrochemical, papermaking, printing and dyeing, pharmaceutical and other industries, there are more and more types of refractory organic compounds in wastewater, which makes these wastewater have many types of pollutants, complex structures, high COD concentration, high toxicity, and refractory biodegradable components. Many characteristics pose a huge threat to human health and natural ecosystems. Therefore, the purification and treatment of such high-concentration industrial organic wastewater has become one of the difficult problems in the field of environmental protection at home and abroad, and has attracted more and more attention. According to the requirements of the Party...

Claims

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Application Information

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IPC IPC(8): C02F1/74
Inventor 季维庆王守凯安路阳王钟欧
Owner SICHUAN YUECHENG ENVIRONMENTAL PROTECTION & ENERGY SAVING TECH CO LTD
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