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Preparation method and application of fluidized bed Fenton catalyst

A fluidized bed, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. The effect of improving the removal rate and enhancing the effect

Inactive Publication Date: 2019-01-15
江苏哈宜环保研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the fluidized bed Fenton catalyst prepared by the existing method is slow and the iron content of the prepared catalyst is low, and a preparation method and application thereof of a fluidized bed Fenton catalyst are provided

Method used

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  • Preparation method and application of fluidized bed Fenton catalyst
  • Preparation method and application of fluidized bed Fenton catalyst
  • Preparation method and application of fluidized bed Fenton catalyst

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Experimental program
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specific Embodiment approach 1

[0030] Specific embodiment one: present embodiment is a kind of preparation method of fluidized bed Fenton catalyst is finished according to the following steps:

[0031] 1. Use distilled water to clean the construction sand repeatedly until the cleaning solution is clear to obtain clean construction sand; soak the cleaned construction sand in a hydrochloric acid solution with a pH value of 1 for 18h to 24h to obtain a building that removes easily acid-soluble substances sand;

[0032] 2. Use distilled water to repeatedly wash the construction sand that removes easily acid-soluble substances until the pH value of the cleaning solution is 7, and then put it in a blast drying oven with a temperature of 105°C to 115°C to dry to obtain dry construction sand;

[0033] 3. Use a sieve to screen the dry construction sand to obtain construction sand with a particle size of 20 mesh to 30 mesh;

[0034] 4. Put the construction sand with a particle size of 20 mesh to 30 mesh into the flu...

specific Embodiment approach 2

[0051] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the particle size described in step 4 is 20 mesh ~ 30 mesh construction sand input amount is 30% ~ 45% of the fluidized bed Fenton reactor volume . Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0052] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the Fe-containing compound described in step five 2+ The influent water is prepared as follows: FeSO 4 ·7H 2 O crystals are dissolved in wastewater with a COD of 30mg / L to 50mg / L to obtain Fe-containing 2+ of water. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method and application of a fluidized bed Fenton catalyst, and relates to the preparation method and the application of the fluidized bed Fenton catalyst. The invention aims at solving the problems that the speed of the fluidized bed Fenton catalyst prepared by the existing method is low, and the iron content of the prepared catalyst is low. The method comprises the following steps that 1, cleaning is performed to obtain building sand subjected to acid soluble substance removal; 2, drying is performed; 3, screening is performed to obtain the building sand with the granularity being 20 to 30 meshes; 4, the building sand is put into a fluidized bed Fenton reactor; 5, inlet water containing Fe<2+> and inlet water containing H2O2 are prepared; 6, the pH value of the inlet water containing Fe<2+> and the inlet water containing H2O2 is regulated; 7, reduction iron powder and iron trioxide are fed into the fluidized bed Fenton reactor; 8, the fluidized bedFenton reactor is continuously operated; the fluidized bed Fenton catalyst is obtained. The preparation method of the fluidized bed Fenton catalyst can be obtained.

Description

technical field [0001] The invention relates to a preparation method and application of a Fenton catalyst. Background technique [0002] The traditional Fenton technique is to utilize the H 2 o 2 In acidic conditions and Fe 2+ The principle of generating hydroxyl radicals (HO·) with strong oxidation activity under the catalysis of the catalyst is widely used in the field of advanced sewage treatment because it can effectively decompose refractory organic matter that cannot be degraded by conventional biotechnology means. However, the traditional homogeneous Fenton technology will produce a large amount of iron sludge during the pH adjustment process, which greatly increases its operating cost. At the same time, the traditional Fenton technology also has disadvantages such as a narrow range of pH value and a large dosage, which limits the application of the homogeneous Fenton technology to a certain extent. Fluidized bed Fenton is a Fenton-like process derived from homoge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053C02F1/72
CPCB01J27/053C02F1/722C02F1/725
Inventor 郭海娟马放李振超
Owner 江苏哈宜环保研究院有限公司