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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  • Summary
  • Abstract
  • Description
  • 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 explosive, and at the same time produce highly toxic nitrogen peroxide gas, polluting the environment

Method used

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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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Embodiment 1

[0017] Example 1, a method for preparing a multi-phase ozone oxidation solid catalyst for water treatment using rare earth molecular sieve waste residue:

[0018] a. Dehydration and drying of waste residue: drying temperature is 200-300°C. The waste residue contains 50% crystal water, and is dehydrated and dried in a far-infrared dryer. b. Grinding: Grinding the dehydrated and dried waste residue together with 1-2% anthracite, the particle size of which is less than 0.1mm, and transferring it to the storage bin for later use. c. Granulation: Granulate in a disc granulator to produce particles with a particle size of 0.5 to 0.8 cm. During the granulation process, spray silica sol as a binder. 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 solid catalyst for water treatment heterogeneous ozone oxidation.

[0019] Ozone oxidation solid catalyst is used to treat coking plant wastewater. The dosage of ...

Embodiment 2

[0020] Embodiment 2 utilizes the ozone oxidation solid catalyst to process a certain oil refinery waste water in Yingkou City (catalyst is the same as embodiment 1), and the ozone dosage is: O3:COD=1, COD drops to 340mg / L by original 540mg / L. After adding the ozone catalyst, under the same dosage of ozone, the COD drops to 140mg / L, and the treatment efficiency increases by 37%.

Embodiment 3

[0021] Embodiment 3 utilizes ozone to oxidize solid catalyst to process certain chemical plant waste water (catalyst is the same as embodiment 1), and ozone dosage is: O3:COD=1, and COD drops to 1350mg / L by original 1800mg / L. After adding the ozone catalyst, the COD drops to 800mg / L, and the efficiency increases 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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