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Nanometer mercury material with lasting adsorption performance

An adsorption performance and long-lasting technology, applied in the fields of alkali metal oxides/hydroxides, inorganic chemistry, gas treatment, etc., can solve the problems of unbalanced regional development, imperfect technology, low utilization of coal gangue, etc., and achieve cost savings Effect

Active Publication Date: 2017-09-15
XUZHOU ZHENFENG NEW TYPE WALL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, due to imperfect technology and unbalanced regional development, the utilization of coal gangue is extremely low

Method used

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  • Nanometer mercury material with lasting adsorption performance
  • Nanometer mercury material with lasting adsorption performance
  • Nanometer mercury material with lasting adsorption performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this example, the composite ceramic carrier is prepared according to the method described in the technical solution of the present invention, which will include 33wt% Al 2 o 3 , 60wt% coal gangue, 7wt% charcoal powder main raw material and silica sol are mixed into a slurry at a weight ratio of 1:3, and then the polyurethane organic foam with a three-dimensional network skeleton structure or a honeycomb structure is immersed in the slurry, and then steamed Dry, repeat several times until the pores in the reticulated skeleton foam are filled. Finally, it is fired at 1300~1390°C for 4 hours, and air-cooled to room temperature to make a mesh or honeycomb composite ceramic carrier. Carrier samples are assembled and placed at an average concentration of 0.1mg / m 3 The application test was carried out in a mercury atmosphere, the sample continued to absorb mercury for 10 hours, and the average concentration of mercury at the outlet was 0.08mg / m 3 The adsorption rate is a...

Embodiment 2

[0048] In the present embodiment, first prepare the composite ceramic carrier according to the method described in the technical solution of the present invention, will comprise the Al of 35wt% 2 o 3 , 60wt% coal gangue, 5wt% starch main raw material and silica sol are mixed into a slurry at a weight ratio of 1:3, and then the polyurethane organic foam with a three-dimensional network skeleton structure or honeycomb structure is immersed in the slurry, and then dried , repeated several times until the pores in the reticulated skeleton foam are filled. Finally, it is fired at 1280~1390°C for 4 hours, and air-cooled to room temperature to make a mesh or honeycomb composite ceramic carrier. After the carrier is washed and dried, it is immersed in 0.1mol / L silver sulfate aqueous solution for 1~2h, and then placed in an oven at 80°C for drying. The sample is assembled and placed at a mercury content of 0.1mg / m 3 The test was carried out in an atmosphere, the sample continued to ...

Embodiment 3

[0050] In the present embodiment, first prepare the composite ceramic carrier according to the method described in the technical solution of the present invention, will comprise the Al of 30wt% 2 o 3 , 60wt% coal gangue, 10wt% charcoal powder and silica sol in a weight ratio of 1:3 are mixed into a slurry, and then three-dimensional network skeleton structure or honeycomb structure polyurethane organic foam is immersed in the slurry, and then dried , repeated several times until the pores in the reticulated skeleton foam are filled. Finally, it is fired at 1280~1390°C for 4 hours, and air-cooled to room temperature to make a mesh or honeycomb composite ceramic carrier. After the carrier is washed and dried, it is impregnated with 0.2mol / L silver chloride aqueous solution for 1~2h, and then placed in an oven at 80°C for drying. The sample is assembled and placed at a mercury content of 0.1mg / m 3 The test was carried out in an atmosphere, the sample continued to absorb mercur...

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Abstract

The invention relates to the field of environment purification and protection, in particular to a nanometer mercury material with lasting adsorption performance. Firstly, a composite aluminum oxide ceramic material is prepared by an organic foam dipping process to serve as a carrier; secondly, an activator is loaded on the surface of the carrier and in a micro pore of the carrier by an immersion method, wherein the coverage area of the activator is 85 percent or more, oxidization of chloride ions, sulfate radicals and nitrate ions in the activator to mercury is used to fix elemental mercury, silver and mercury are formed into amalgam to react and solubilize the elemental mercury, and the huge surface of porous ceramic is used to absorb valence state mercury; and finally, the mercury is reclaimed through a low-temperature thermal desorption method, and circular utilization of the carrier is realized. The material has performances of large surface area, strong permeability, high compression strength, impact resistance, high temperature resistance, environmental friendliness, high chemical stability and the like, the carrier can be circularly used, mercury recovery is simple and feasible, and secondary pollution is not caused. Furthermore, a material preparation process is simple and low in cost. The nanometer mercury material has very good application potential and good social and economic benefits.

Description

technical field [0001] The invention relates to the field of environmental purification and protection, and the specific application field is a persistent sodium mercury material used in the treatment of mercury-containing waste gas in the process of non-ferrous metal smelting, PVC chemical industry, waste incineration waste gas, and coal-fired discharge. Background technique [0002] Mercury is one of the more toxic heavy metal elements emitted into the atmosphere, which is very harmful to human health and air quality. It is also a globally mobile pollutant, and the problem of mercury pollution has become a hot spot of global concern. [0003] In order to realize the reasonable control of mercury content in waste gas and flue gas emitted by chemical industry, mining, smelting, coal burning, hospital, factory and other industries or departments during production or work, a large number of mercury removal technologies have been carried out abroad. research work. Mercury emi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30B01D53/64B01D53/81
CPCB01D53/64B01D53/81B01D2257/602B01J20/0281B01J20/0288B01J20/0296B01J20/28054
Inventor 张正洁陈扬冯钦忠
Owner XUZHOU ZHENFENG NEW TYPE WALL MATERIAL CO LTD
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