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Preparation method of composite demercuration agent

A mercury removal agent and alumina removal technology, which is applied in separation methods, chemical instruments and methods, gas treatment and other directions, can solve the problems of high bulk density of mercury removal agent, easy blockage of pores, and low mercury removal accuracy, and achieves the preparation process. Simple and easy to operate, reduce production costs, and improve the effect of mercury removal accuracy

Inactive Publication Date: 2019-11-22
天津浩创节能环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing mercury removal agents mainly have the following two problems: on the one hand, the utilization rate of active components in the mercury removal agent is low, resulting in low mercury removal accuracy; on the other hand, the preparation process of the mercury removal agent adopts multi-stage The method of impregnation has many operation steps, the process is relatively complicated, and the production cost is high
In addition, there are also defects such as high bulk density of mercury removal agent, small specific surface area of ​​carrier, and easy blockage of pores.

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0024] A preparation method of a composite mercury removal agent, the specific steps are as follows:

[0025] Step 1, preparing dry strips,

[0026] Mix fast alumina powder, pseudo-boehmite dry powder, and lubricant, add acid-containing aqueous solution, knead into a uniform mass, and use the orifice plate of the extruder to extrude the mass into strips. Drying treatment is carried out to obtain dry strips;

[0027] Step 2, preparing alumina carrier,

[0028] Calcining the dry bar at 950-1050°C in an oxidizing atmosphere until the water content of the dry bar is calcined below 5%, to obtain an alumina carrier;

[0029] Step 3, preparing the impregnation solution,

[0030] Slowly drop the silver nitrate aqueous solution into the thiosulfate aqueous solution, and keep stirring to prepare the silver thiosulfate impregnating solution, and store it in a dark place for future use;

[0031] Step four, impregnating the carrier,

[0032] Immerse the alumina carrier obtained in ste...

Embodiment 1

[0043] A preparation method of a composite mercury removal agent, the specific steps are as follows:

[0044] Step 1, preparing dry strips,

[0045] Mix fast alumina powder, pseudo-boehmite dry powder, and lubricant, add acid-containing aqueous solution, knead into a uniform mass, and use the orifice plate of the extruder to extrude the mass into strips. Drying treatment is carried out to obtain dry strips;

[0046] Step 2, preparing alumina carrier,

[0047] The dry bar is calcined at 950°C in an oxidizing atmosphere until the water content of the dry bar is calcined to below 5%, to obtain an alumina carrier;

[0048] Step 3, preparing the impregnation solution,

[0049] Slowly drop the silver nitrate aqueous solution into the thiosulfate aqueous solution, and keep stirring to prepare the silver thiosulfate impregnating solution, and store it in a dark place for future use;

[0050] Step four, impregnating the carrier,

[0051] Immerse the alumina carrier obtained in ste...

Embodiment 2

[0061] A preparation method of a composite mercury removal agent, the specific steps are as follows:

[0062] Step 1, preparing dry strips,

[0063]Mix fast alumina powder, pseudo-boehmite dry powder, and lubricant, add acid-containing aqueous solution, knead into a uniform mass, and use the orifice plate of the extruder to extrude the mass into strips. Drying treatment is carried out to obtain dry strips;

[0064] Step 2, preparing alumina carrier,

[0065] The dry bar is calcined at 1050°C in an oxidizing atmosphere until the water content of the dry bar is calcined to below 5%, to obtain an alumina carrier;

[0066] Step 3, preparing the impregnation solution,

[0067] Slowly drop the silver nitrate aqueous solution into the thiosulfate aqueous solution, and keep stirring to prepare the silver thiosulfate impregnating solution, and store it in a dark place for future use;

[0068] Step four, impregnating the carrier,

[0069] Immerse the alumina carrier obtained in ste...

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Abstract

The invention provides a preparation method of a composite demercuration agent, which comprises the following steps: adding quick-demercurating alumina powder, pseudo-boehmite dry powder and a lubricant into an acid-containing water solution, extruding the mixture into strips, and drying the strips; calcining the dried strip in an oxidizing atmosphere to obtain an aluminum oxide carrier; dropwiseadding a silver nitrate aqueous solution into a thiosulfate aqueous solution, continuously stirring the mixture, and preserving the product in a dark place for later use; impregnating an alumina carrier in the silver thiosulfate dipping solution, moving out the alumina carrier, carrying out purging treatment on the dipped alumina carrier by using carbon dioxide, then carrying out water washing anddrying to obtain the composite demercuration agent. The demercuration agent prepared by the method has proper pore volume, specific surface area and active component content, and is in more sufficient contact with a to-be-demercurated raw material, so that the demercuration precision of the demercuration agent is improved; the preparation process of the demercuration agent is simple and easy to operate, no gas-phase sulfide participates in the preparation process, environmental pollution in the production process is reduced, and the production cost is also reduced.

Description

technical field [0001] The invention relates to the technical field of environmental protection preparations, in particular to a preparation method of a composite mercury removal agent. Background technique [0002] The current main non-renewable fuels such as oil and natural gas will contain a certain amount of mercury, which will not only pollute containers and pipelines, but as one of the main air pollutants, it will also have a certain negative effect on human health after combustion. Therefore, it is necessary to remove mercury from the tail gas after fuel combustion. The existing mercury removal agents mainly have the following two problems: on the one hand, the utilization rate of active components in the mercury removal agent is low, resulting in low mercury removal accuracy; on the other hand, the preparation process of the mercury removal agent adopts multi-stage The impregnation method has many operation steps, the process is relatively complicated, and the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/64B01D53/81
CPCB01D53/64B01D53/81B01D2257/602
Inventor 田晓亮田永军田浩
Owner 天津浩创节能环保设备有限公司
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