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Method for improving ozone reaction efficiency

A reaction efficiency and ozone technology, applied in the field of improving ozone reaction efficiency, can solve the problems of low oxidation treatment efficiency and low ozone utilization efficiency, and achieve the effects of improving ozone utilization efficiency, improving oxidation efficiency, and increasing mechanical properties

Inactive Publication Date: 2015-11-04
NANJING UNIV +1
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Problems solved by technology

[0008] Aiming at the problems of low ozone utilization efficiency and low oxidation treatment efficiency existing in the existing ozone oxidation technology field, the present invention provides a method for improving the efficiency of ozone reaction, which uses multi-stage and multi-stage technical methods to increase the concentration of ozone and waste water. The reaction steps increase the gas-water contact time, which has the advantages of enhancing the efficiency of ozone utilization and improving the efficiency of ozone oxidation

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Embodiment 1

[0040] The invention aims at the technical problems existing in the existing ozone reaction device: 1) the ozone utilization efficiency is not high; 2) the oxidation treatment efficiency is low; 3) there are ozone residues in the effluent water and other difficulties. The present invention has developed a kind of device that improves ozone reaction efficiency for described method, as figure 2 As shown, the device is provided with water inlet and backwash layer 1, non-interference reaction layer 2, catalyst layer 3, short flow elimination layer 4, secondary distribution layer 5, and top water outlet layer 6 from bottom to top. The same side of the washing layer 1 and the non-interference reaction layer 2 are respectively provided with a water inlet 11 and an air inlet 21, and the other side of the water inlet and backwashing layer 1 is provided with a flushing port 12, which is used for backwashing the device to prevent The device runs for a long time, and the sediment in the ...

Embodiment 2

[0053] A method for improving ozone reaction efficiency, its method steps are the same as embodiment 1, wherein, in step A, the gas-liquid ratio is controlled to be 0.5:1, the wastewater pH is adjusted to 6.0, COD is at 70mg / L, and the ozone mass concentration in the mixed gas is 5%, the mass concentration of oxygen is 95%, the aeration disc can cut the ozone gas into tiny bubbles, and the average diameter of the bubbles is 0.5μm.

[0054] In step B, the two phases of water and gas are in the non-interference reaction layer 2 for non-interference reaction, and the residence time of the gas-water mixture in this stage, that is, the reaction time is 5 minutes.

[0055]In step C, the catalytic material used is a supported composite catalytic material, the material is a catalyst filler NDC-003, NDC-005, NDC-001, NDC-002, and the carrier is a porous material, such as silica gel, activated carbon, ceramics or resin, etc., The load is one or more mixtures of heavy metals such as copp...

Embodiment 3

[0057] A method for improving ozone reaction efficiency, the method steps are the same as in Example 1, wherein the gas-liquid ratio in step A is controlled to be 1:1, the pH of the wastewater is adjusted to 7.5, the COD is at 90 mg / L, and the mass concentration of ozone in the mixed gas is 10%, the oxygen mass concentration is 90%, the aeration disc can cut the ozone gas into tiny bubbles, and the average diameter of the bubbles is 10μm.

[0058] In step B, the two phases of water and gas are in the non-interference reaction layer 2 for non-interference reaction, and the residence time of the gas-water mixture in this stage, that is, the reaction time is 10 minutes.

[0059] In step C, the catalytic material used is a supported composite catalytic material, the material is a catalyst filler NDC-003, NDC-005, NDC-001, NDC-002, and the carrier is a porous material, such as silica gel, activated carbon, ceramics or resin, etc., The load is one or more mixtures of heavy metals su...

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Abstract

The invention discloses a method for improving ozone reaction efficiency and belongs to the technical field of waste water treatment and ozonation. The method comprises the following steps that A, waste water enters a water distributing unit, mixed gas enters a gas distributing unit, and the gas-liquid ratio is controlled to be 0.5:1-1:1; B, after the water and the gas are mixed in a water inlet area, an interference-free reaction is conducted; C, then the water and the gas enter in a catalytic reaction stage, and supported composite catalytic materials serve as catalytic materials; D, after short flow of the water and the gas is removed, secondary adjustment is carried out on mixing of ozone and the waste water; E, the ozone and the waste water are distributed for the second time in a filter reaction unit, and water meeting the standard is discharged after the ozone and the waste water fully react. According to the method, the gas-water contact efficiency is improved, meanwhile, the reaction time of the ozone is prolonged, the gas-water mixing reaction can achieve extremely-high efficiency, and the reaction efficiency of the ozone can be above 99.9%.

Description

technical field [0001] The invention belongs to the technical field of ozone oxidation for wastewater treatment, and more specifically relates to a method for improving the efficiency of ozone reaction. Background technique [0002] After decades of development, ozone oxidation technology has become one of the core technologies in the field of advanced oxidation for water purification. In order to improve the efficiency of gas-water reaction and enhance the efficiency of ozone utilization, catalysts are often used to promote ozone to produce more strong oxidizing intermediate products (such as hydroxyl radicals, etc.); at the same time, the structural design of the ozone reaction device can also be optimized, and ozone technology research at home and abroad Researchers have done a lot of research work around the ozone reaction tower. The domestic ozone reaction devices are mainly top spray reactors or single-packed countercurrent reactors. [0003] The current common ozone ...

Claims

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Application Information

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IPC IPC(8): C02F1/78
Inventor 张猛张炜铭徐敬生吕路汪林常毅何锐赵昕潘丙才
Owner NANJING UNIV
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