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Two-pore zeolite microsphere and preparation method thereof

A technology of microspheres and zeolites, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of adsorption of organic macromolecules or biomacromolecules, increase of device head loss, Due to problems such as limitations in the application field, it achieves the effects of not easy water loss, high adsorption and exchange capacity, and easy fluidization

Active Publication Date: 2013-05-08
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, fly ash-based zeolite molecular sieves have two serious shortcomings. First, their pore size is less than 1.3 nm, which makes them only suitable for applications involving small molecules, not suitable for organic macromolecules or biological macromolecules. Adsorption, the field of application is very limited
Secondly, in actual operation, most zeolites are in the form of powder, and if the particle size is too small, it is easy to lose with the effluent, which not only increases the head loss of the device, but also is not easy to recycle.

Method used

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  • Two-pore zeolite microsphere and preparation method thereof
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  • Two-pore zeolite microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Fly ash pretreatment: Take 50g of industrial fly ash in water, remove lumps and suspended slag, wash with water to remove accumulated adsorbate, filter, dry and grind at 105°C, pass through a 200-mesh sieve, get the product A , placed in a desiccator for later use.

[0028] Step 2: Setting of muffle furnace sintering curve: the first section is to heat up from 0-200°C for 5 minutes, the second section is to heat up from 200-550°C for 10 minutes, the third section is to heat up from 550-950°C for 10 minutes, and the fourth section is to heat up from 550-950°C for 10 minutes. The first stage is to heat up from 950-1150°C for 10 minutes, and the fifth stage is to keep warm at 1150°C for 10 minutes.

[0029] Step 3: Pick up the product A 24g, coal powder 8g, Fe 2 o 3 2g, Na 2 CO 3 1g and 24ml of water, mix thoroughly. The mixed sample is hand-made into balls with a diameter of 5-8 mm, placed in a muffle furnace, and roasted into ultra-light fly ash balls ac...

Embodiment 2

[0035] 1. Build the reactor: The reactor is made of plexiglass, with a diameter of 60 mm and a column height of 700 mm. There is a sampling hole. Compressed air enters the reactor from the bottom through the aeration diffuser, and the aeration is adjusted with an air flow meter. Quantity, using downward flow into the water, gas-water reverse contact reaction.

[0036] 2. Configure test water: use artificial water distribution, and the mass concentration of COD in the simulated test water is 126~316 mg / L, NH 4 + The mass concentration of -N is 45-77 mg / L, and the pH is 7.2-8.0.

[0037] 3. Enrichment culture and fixation of nitrifying bacteria liquid: the ultra-slight mesoporous zeolite microspheres in Example 1 are subjected to high-temperature sterilization, according to the literature (Yang Hongyan, Long Xiujuan, Li Qinghua. Nitrifying bacteria enrichment culture and treatment of eutrophication Research on the application of chemical water. Environmental Protection Science...

Embodiment 3

[0040] The performance detection of the material made in embodiment 1 is as follows:

[0041] 1. For the test method of physical properties (bulk density, water absorption) of zeolite balls, please refer to the literature (CJ / T 299-2008 Artificial ceramsite filter material for water treatment [S]), the results show that the water absorption of Example 1 is 18- 24%, the bulk density is 610-630 kg∕m 3 ,

[0042] 2. For the test method of compressive strength of zeolite balls, please refer to the literature (Weng Huanxin, Zhang Jinjun, Cao Yansheng, etc. Performance characteristics and firing process of sludge ceramsite[J].Journal of Zhejiang University (Engineering Science Edition), 2011, 45(10) : 1077-1883.), the results show that: the compressive strength of Example 1 is ≥ 6Mpa,

[0043] 3. Specific surface test:

[0044] The microspheres prepared in Example 1 were pulverized with a pulverizer and then sieved with a 100-mesh sieve, placed in an electric heating constant tem...

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Abstract

The invention discloses a two-pore zeolite microsphere and a preparation method thereof. The diameter of the microsphere is 4-6mm, the water absorption is 18-24%, the apparent density is 610-630kg / m<3>, and the compressive strength is greater than or equal to 6MPa. Compared with the prior art, the prepared super-light micropore-mesopore two-pore zeolite microsphere has certain compressive strength, is easily fluidized and prevents water loss; with micropore and mesopore two-model pore distribution, the diffusion path of molecules can be shortened, the specific surface area is large, and the adsorption exchange ability is relatively strong; and the two-pore zeolite microsphere can be applied to deep treatment of industrial wastewater, and also can be used as a carrier of an aerobic (anaerobic) microorganism / photocatalyst of an aerobic (anaerobic / photocatalysis) fluidized bed reactor in the field of water (wastewater) treatment. The invention provides a new green efficient method for expanding the application of industrial waste fly ash to the field of environmental protection.

Description

technical field [0001] The invention relates to an ultra-slight mesoporous zeolite microsphere material using fly ash and a preparation method thereof, belonging to the aerobic (anaerobic / photocatalytic) flow in the field of preparing industrial solid waste fly ash into water (waste water) treatment Aerobic (anaerobic) microorganism / photocatalyst carrier for chemical bed reactor. Background technique [0002] The report of using fly ash to synthesize zeolite molecular sieves can be traced back to the research work of Holler and wrisching [Holler, WirsehingU. , Fly ash-based zeolite molecular sieves have been used in the removal of solid particles, heavy metal ions and organic pollutants in wastewater for adsorption treatment, as well as the immobilization of biological macromolecules and enzymes. It has the advantages of simple process and convenient operation. [0003] However, fly ash-based zeolite molecular sieves have two serious shortcomings. First, their pore size is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30C02F1/28C02F3/10C02F3/34C02F3/28C02F1/30B01J32/00B01J29/80
CPCY02W10/10
Inventor 唐海
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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