Preparation method of recoverable and regenerable carbon net combined powder non-metal mineral porous water purifying material

A technology of non-metallic minerals and regenerated carbon, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of overall performance decline of adsorbent, complex preparation process, long replacement cycle, etc., to achieve enhanced adsorption Water purification performance, simple operation process, easy recycling and regeneration effect

Active Publication Date: 2019-02-15
ZHEJIANG INST OF GEOLOGY & MINERAL RESOURCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that the preparation process is complicated, and the price and cost are relatively high, which limits its application in the field of environmental protection to a certain extent; ion exchange resin is a kind of organic polymer with network structure
The biggest advantage is that it can be recycled and reused. The main disadvantages are: such as excessive regeneration waste liquid, long replacement cycle, large salt consumption, poor universal applicability, etc.; non-metallic mineral materials have good performance due to their unique structure. It has excellent adsorption and ion exchange performance, large reserves, low price, and no pollution to the environment. It is a kind of high-quality and cheap adsorbent that is environmentally friendly and has great development prospects.
[0004] At present, non-metallic mineral materials with good adsorption performance are mainly used in the form of powder in the water treatment process. In the actual use process, it is found that there are certain defects in this use method: first, when a large amount of powder adsorption materials are put into the water body, these adsorption The material will diffuse into the water area and cannot be recovered, and eventually deposits at the bottom of the water, resulting in an increase in silt in the water area, which conflicts with the task of dredging and reducing silt proposed in the current water pollution control; at the same time, the adsorption of pollutants changes over time There is a possibility of reducing and re-releasing pollutants in the adsorbent; in addition, this one-time throwing in non-recyclable method has resulted in a large amount of adsorbent usage and a certain degree of waste of mineral resources
Although the product obtained by this method has a certain adsorption performance, due to the sintering process of some powder particles, the relative area and surface activity of the powder particles are reduced. The performance is obviously reduced, and the energy consumption of firing at higher temperature is also higher

Method used

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  • Preparation method of recoverable and regenerable carbon net combined powder non-metal mineral porous water purifying material
  • Preparation method of recoverable and regenerable carbon net combined powder non-metal mineral porous water purifying material
  • Preparation method of recoverable and regenerable carbon net combined powder non-metal mineral porous water purifying material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Zeolite powder and bentonite powder with a particle size of 200 mesh are used as powder non-metallic mineral raw materials, wood chips and starch are used as carbon network forming agents, and zinc chloride is used as carbonization aid. The mass ratio of each component is as follows: 80% of zeolite powder, 5% of bentonite powder, 11.5% of sawdust, 3% of starch, and 0.5% of zinc chloride. The raw materials are mechanically mixed and stirred evenly for later use. Add an appropriate amount of water and silica sol to the mixed raw materials, and granulate them into particles with a particle size of 3mm-5mm by mechanical means. The granules obtained by granulation were dried in an oven at 105°C for 5 hours, and then placed in an electric furnace with nitrogen atmosphere for heat treatment and carbonization. The target carbonization temperature was 500°C, the heating rate was 2°C / min, and the target temperature was kept for 2 hours. After the heat preservation is completed, ...

Embodiment 2

[0025] Diatomite powder and bentonite powder with a particle size of 200 mesh are used as powder non-metallic mineral raw materials, resin powder and starch are used as carbon network forming agents, and nickel chloride is used as carbonization aid. The mass ratio of each component is as follows: 70% of diatomite powder, 10% of bentonite powder, 13% of resin powder, 5% of starch, and 2% of nickel chloride. The raw materials are mechanically mixed and stirred evenly for later use. Then add the aqueous solution to the powder that has been mixed before and mix it evenly to form a plastic clay, and then granulate it into particles with a particle size of 10mm-20mm or make a product with a certain shape. Dry the obtained granules or products in an oven at 105°C for 5 hours, and then put them into an electric furnace with nitrogen atmosphere for heat treatment and carbonization. The target carbonization temperature is 800°C, the heating rate is 5°C / min, and the target temperature is...

Embodiment 3

[0027] Zeolite powder and bentonite with a particle size of 325 mesh are used as powder non-metallic ore raw materials, wood chips are used as carbon network forming agent, and ferric chloride is used as carbonization aid. The mass ratio of each component is as follows: 88% of zeolite powder, 5% of bentonite powder, 4% of polyvinyl alcohol powder, 2% of resin powder, and 1% of ferric chloride. First mix the raw materials evenly, then add the aqueous solution to the raw materials to granulate into particles with a particle size of 5mm-10mm or products with a certain shape. Then dry the particles or products in an oven at 105°C for 5h, and then put them into an electric furnace with a carbon dioxide atmosphere for heat treatment and carbonization. The target carbonization temperature is 400°C, the heating rate is 3°C / min, and the target temperature is kept for 2h. After the heat preservation is over, continue to pass carbon dioxide gas until it is cooled to room temperature to o...

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Abstract

The invention discloses a preparation method of a recoverable and regenerable carbon net combined powder non-metal mineral porous water purifying material. The preparation method primarily comprises the following steps: mechanically mixing, granulating or modeling one or more of a zeolite powder, a bentonite powder, a diatomite powder or other non-metal minerals as a primary powder raw material bytaking a carbon-containing organic matter powder or a liquid as a carbon net forming agent, transitional metals such as zinc chloride, iron chloride or nickel chloride and the like as a carbonizing auxiliary agent and a small amount of silica sol as a constant temperature binder; and carrying out low-temperature thermal treatment in a non-oxidized atmosphere to obtain the porous water purifying material which is relatively good in strength. The carbon net combined powder non-metal mineral porous water purifying material prepared by the invention has the characteristics of being good in strength, high in porosity, large in specific surface area, good in adsorption performance and free of disassembly when being used for water treatment, is convenient to use and can be recycled and regenerated.

Description

technical field [0001] The invention relates to a preparation method of a water purification material, in particular to a preparation method of a recyclable regeneration carbon net combined with a powder non-metallic mineral porous water purification material. Background technique [0002] With the rapid advancement of population growth, industrialization and urbanization, a large amount of pollutants have been produced in the process of human life and production activities, which has caused the deterioration of the ecological environment on a global scale. Among environmental pollution factors, water pollution directly affects Human production and life. The purification and restoration of polluted water has become an environmental and social problem that is widely concerned by the whole society and needs to be solved urgently. [0003] Adsorption purification is currently the most widely used method in water treatment, mainly using activated carbon, ion exchange resin, and...

Claims

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Application Information

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IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/16
CPCB01J20/02B01J20/103B01J20/20C02F1/281C02F2101/16
Inventor 吴小贤李春生王杰陈玲霞潘方珍吕双双
Owner ZHEJIANG INST OF GEOLOGY & MINERAL RESOURCE
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