Method for preparing multiphase ozonation solid catalyst for water treatment by using rare earth molecular sieve waste residues

A solid catalyst and ozone oxidation technology, applied in the field of environmental science, can solve the problems of highly toxic, flammable and explosive, and pollute the environment, and achieve the effects of improving environmental pollution, improving catalytic activity, and reducing production costs

Inactive Publication Date: 2014-08-06
张振慧 +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in the production process, it is easy to cause safety accidents such as flammable and exp

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  • Method for preparing multiphase ozonation solid catalyst for water treatment by using rare earth molecular sieve waste residues

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Example Embodiment

[0017] Example 1, a process for preparing a solid catalyst for water treatment heterogeneous ozone oxidation by using waste residue of rare earth molecular sieve:

[0018] a. Dehydration and drying of waste residue: drying temperature 200~300℃. The waste residue contains 50% crystal water and is dehydrated and dried in a far-infrared dryer. b. Crushing: pulverize the dewatered and dried waste residue with 1 to 2% of anthracite, and the crushed particle size is less than 0.1mm, and transferred to the storage bin for later use. c. Granulation: granulate in a disc granulator to prepare particles with a particle size of 0.5 to 0.8 cm, and spray silica sol as a binder during the granulation process. The ratio: powder: silica sol = 100 : 3~4. d. Drying and roasting: drying at 200-300°C and roasting at 1100-1200°C to form a heterogeneous ozone oxidation solid catalyst for water treatment.

[0019] Use ozone oxidation solid catalyst to treat coking plant wastewater. The dosage of ozone ...

Example Embodiment

[0020] Example 2, using ozone oxidation solid catalyst to treat wastewater from a refinery in Yingkou City (the catalyst is the same as in Example 1), the dosage of ozone is: O3:COD=1, and the COD is reduced from 540mg / L to 340mg / L. After adding the ozone catalyst, under the same ozone dosage, the COD is reduced to 140mg / L, and the treatment efficiency is increased by 37%.

Example Embodiment

[0021] Example 3, using ozone oxidation solid catalyst to treat wastewater from a chemical plant (the catalyst is the same as in Example 1), the dosage of ozone is: O3:COD=1, and the COD is reduced from the original 1800mg / L to 1350mg / L. After adding ozone catalyst, COD is reduced to 800mg / L, and efficiency is increased by 31%.

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Abstract

The invention discloses a method for preparing a multiphase ozonation solid catalyst for water treatment by using rare earth molecular sieve waste residues. According to the method, metallic oxide and rare-earth oxide in the waste residues are sufficiently utilized as active agents for ozonation. The solid catalyst is suitable for various wastewater treatment, purposes of treating waste by waste and turning harm into good are achieved, the defects that the environment is polluted and the land is occupied by the waste residues are overcome, and remarkable economic benefits and environmental benefits are provided.

Description

1. Technical field [0001] The invention relates to the preparation of multi-phase ozone oxidation solid catalyst for water treatment by utilizing rare earth molecular sieve waste residue, belongs to the field of environmental science and technology, and in particular relates to a catalyst for solid waste residue utilization and wastewater treatment ozone oxidation. 2. Background technology [0002] Ozone has a very strong oxidation ability, the oxidation ability is second only to fluorine, higher than chlorine and potassium permanganate, it can be decomposed in water without secondary pollution, and it is a green oxidizing agent for water treatment. Ozone not only has a strong disinfection and sterilization ability, but also can oxidize and remove micro-pollution and refractory organic matter in water. At present, it is widely used in the field of water treatment. [0003] The effect of using ozone technology is good or bad, the key is to improve the oxidation capacity of oz...

Claims

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Application Information

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IPC IPC(8): B01J23/889C02F1/78
Inventor 张振慧
Owner 张振慧
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