Autoclaved porous zeolite filter material having composite manganese and phosphorus removal effect and preparation method thereof

A porous zeolite and filter material technology, which is applied in the field of environmental water treatment, can solve the problems of expensive resin, high operating costs, and difficult regeneration, and achieve the effects of good effluent quality, reduced energy consumption, and mature production equipment

Active Publication Date: 2021-03-12
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The neutralization precipitation method adjusts the pH value of the wastewater by adding alkaline chemicals to precipitate manganese ions, but this method will result in a high pH value of the water, which needs to be neutralized before it can be discharged, and it is easy to cause secondary pollution problems
Ion exchange resin has high selectivity and excellent ability to remove heavy metals from heavy metal wastewater, but the resin is expensive, difficult to regenerate, and expensive to operate. In summary, it is urgent to develop a new type of filter material with high efficiency and low price.

Method used

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  • Autoclaved porous zeolite filter material having composite manganese and phosphorus removal effect and preparation method thereof
  • Autoclaved porous zeolite filter material having composite manganese and phosphorus removal effect and preparation method thereof
  • Autoclaved porous zeolite filter material having composite manganese and phosphorus removal effect and preparation method thereof

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preparation example Construction

[0025] The preparation process and application results of the present invention are further illustrated below in conjunction with examples.

[0026] Principle of the present invention is:

[0027] 1. Natural zeolite has a skeleton structure, and the most basic structural units constituting the zeolite skeleton are silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron. Due to the diverse connection modes of silicon (aluminum) oxygen tetrahedra, many holes and channels are formed in the zeolite structure, but the holes and channels inside the natural zeolite structure are usually filled by water molecules and other impurities. The present invention selects hydrothermal synthesis to add Na when preparing autoclaved porous zeolite filter material 2 SO 4 solution, Na + Will replace other channels such as Mg 2+ The cation with larger equal radius makes the steric hindrance smaller, accelerates the internal diffusion, increases the exchange capacity, and improves the ion exc...

Embodiment example 1

[0045] Implementation Case 1: Combining figure 1 , the preparation process of a kind of composite autoclaved porous zeolite filter material with manganese and phosphorus removal of the present invention is as follows:

[0046] In the first step, the natural zeolite is ground into a powder with a particle size of more than 100 mesh, and a powder with a particle size of quartz powder above 200 mesh;

[0047] The second step is to measure according to the quality of zeolite: quartz: cement=40kg: 30kg: 30kg;

[0048] The 3rd step, at first the 2wt%Na of 8kg is added in the natural zeolite powder of metering 2 SO 4 The solution is uniformly mixed, which is called zeolite premix; then the zeolite premix is ​​mixed with measured quartz powder, cement, and 11kg of ball-forming water to form a mixture;

[0049] In the fourth step, the mixture is granulated into balls in the ball forming tray, and the particle size of the filter material is 3-8mm;

[0050] The fifth step is to carry...

Embodiment example 2

[0055] Implementation Case 2: Combining figure 1 , the preparation process of a kind of composite autoclaved porous zeolite filter material with manganese and phosphorus removal of the present invention is as follows:

[0056] In the first step, the natural zeolite is ground into a powder with a particle size of more than 100 mesh, and a powder with a particle size of quartz powder above 200 mesh;

[0057] The second step is to measure according to the quality of zeolite: quartz: cement=50kg: 25kg: 25kg;

[0058] The 3rd step, at first the 2wt%Na of 10kg is added in the natural zeolite powder of metering 2 SO 4 The solution is uniformly mixed, which is called zeolite premix; then the zeolite premix is ​​mixed with measured quartz powder, cement, and 12kg of ball-forming water to form a mixture;

[0059] In the fourth step, the mixture is granulated into balls in the ball forming tray, and the particle size of the filter material is 3-8mm;

[0060] The fifth step is to carr...

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Abstract

The invention provides an autoclaved porous zeolite filter material having composite manganese and phosphorus removal effect and a preparation method thereof. The preparation method comprises the following steps: metering zeolite powder, quartz powder and cement according to the mass percentage of (40-60) : (20-30) : (15-30), adding a Na2SO4 solution and pelletizing water, pelletizing the mixturein a pelletizin disc to prepare spherical granules with required particle size, and carrying out natural curing at room temperature for 24 hours, and then carrying out autoclaved curing. The method has the production advantages of simple operation, simple process, low energy consumption and the like. Tthe ceramsite filter material has developed pores, has alkali evolution, calcium release and ionexchange properties, can continuously and stably remove phosphorus and manganese pollutants in wastewater, and has good application prospects in the field of sewage treatment.

Description

technical field [0001] The invention relates to a composite autoclaved porous zeolite filter material for manganese and phosphorus removal and a preparation method thereof, belonging to the field of environmental water treatment. Background technique [0002] With the continuous acceleration of the urbanization process, the amount of wastewater discharge has increased year by year, and a large amount of wastewater discharge has caused serious water pollution. Phosphorus is an essential nutrient element in the growth and reproduction of water animals and plants, but its content in water exceeds 20mg / m 3 Oxygenation will cause eutrophication of the water body, which will lead to excessive reproduction of aquatic organisms, and the dissolved oxygen content in the water body will decrease significantly, a large number of animals and plants will die due to hypoxia, and poisonous aquatic organisms such as fish and shrimp in the water body. The current treatment method for phospho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B38/08C04B40/02B01D39/06B01J20/18C02F1/28B01J20/30C02F1/42C02F1/66C02F101/20C04B111/40
CPCC04B28/02B01J20/18B01D39/06C02F1/281C02F1/66C02F1/42C04B2201/50C04B2201/20C04B2111/40C04B2111/00793C02F2101/206C02F2101/20C04B14/06C04B14/047C04B22/147C04B40/0245C04B38/08Y02W10/10
Inventor 崔崇杜艳云崔晓昱王朋涛李天君
Owner NANJING UNIV OF SCI & TECH
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