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Selective thermal sintering molding 3D printing mercury removal bag cage and preparation method thereof

A 3D printing and thermal sintering technology, applied in the direction of separation methods, chemical instruments and methods, 3D object support structures, etc., can solve the problem of poor fastness of uniform combination of catalysts, affect the actual application effect of mercury removal filter bags, and catalyst loading capacity Small and other problems, to achieve the effect of large load, improve the effect of granulation and extrusion, and avoid hydrophobicity

Active Publication Date: 2021-04-02
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have the following disadvantages: the catalyst loading in the mercury removal filter bag prepared by the former is usually small and the filter bag resistance is relatively large; The fastness is poor
The above shortcomings all affect the actual application effect of the mercury removal filter bag

Method used

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  • Selective thermal sintering molding 3D printing mercury removal bag cage and preparation method thereof
  • Selective thermal sintering molding 3D printing mercury removal bag cage and preparation method thereof
  • Selective thermal sintering molding 3D printing mercury removal bag cage and preparation method thereof

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preparation example Construction

[0032] refer to figure 1 , figure 2 and image 3 , a selective thermal sintering molding 3D printing mercury removal bag cage and a preparation method thereof, comprising the following steps:

[0033] (1) By weight, 30-55 parts of mercury removal catalyst powder, 20-45 parts of polytetrafluoroethylene powder, 10-20 parts of polyimide powder, 0.5-4 parts of didodecyl alcohol ester, 5- 10 parts of nano-silica are mixed, ball milled, and then melted to obtain the material, and then 0.2 to 4 parts of dioctyl phthalate are added to the material, stirred, extruded and granulated to obtain 3D printing printing materials;

[0034] (2) Create a three-dimensional model of the mercury removal bag cage. The main body of the mercury removal bag cage is a straight cylinder with micropores, and the bottom of the straight cylinder is also provided with micropores, and the size and spacing of the micropores are set;

[0035] (3) slice the three-dimensional model of the mercury removal bag...

Embodiment 1

[0048] After mixing 6.2kg of mercury removal catalyst powder, 5.4kg of polytetrafluoroethylene powder, 2.8kg of polyimide powder, 0.4kg of dodecyl alcohol ester, and 1kg of nano silicon dioxide, they were placed on a planetary ball mill for ball milling. The speed of the ball mill is 220r / min, every 20min is a round, and there are 5 rounds of grinding, that is, the ball milling time is 100min. Then melt processing at 380°C to obtain material A, then add 0.045kg of dioctyl phthalate to the material A, stir to obtain material B, and then extrude powder particles with an average particle size of 30 μm through a granulator, Obtain printing materials that can be used by 3D printing equipment; use Solidworks software to create a 3D model of the bag cage. The size of the bag cage is: the diameter of the upper ring mouth is 155mm, the thickness is 5mm, the bottom diameter is 120mm, the length of the bag cage is 900mm, and the diameter of the microhole is 3mm , Microhole spacing 5mm. ...

Embodiment 2

[0052] After mixing 7.6kg of mercury removal catalyst powder, 5.1kg of polytetrafluoroethylene powder, 2.5kg of polyimide powder, 0.3kg of dodecyl alcohol ester, and 1.2kg of nano-silicon dioxide, they are placed on a planetary ball mill for ball milling , the speed of the ball mill is 220r / min, every 20min is a round, and there are 5 rounds of grinding, that is, the ball milling time is 100min. Then melt processing at 380°C to obtain material A, then add 0.085kg dioctyl phthalate to the material A, stir to obtain material B, and then extrude powder particles with an average particle size of 40 μm through a granulator, Get printing materials that can be used by 3D printing equipment; use Solidworks software to create a 3D model of the bag cage. The size of the bag cage is: the diameter of the upper ring mouth is 155mm, the thickness is 5mm, the bottom diameter is 120mm, the length of the bag cage is 900mm, and the diameter of the microhole is 5mm , Microhole spacing 5mm. Use ...

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Abstract

The invention discloses a selective thermal sintering molding 3D printing mercury removal bag cage and a preparation method thereof. The preparation method includes the steps that mercury removal catalytic powder, polytetrafluoroethylene powder, nano silicon dioxide, polyimide powder, didodecanol ester, and dioctyl phthalate serve as raw materials, a 3D printing material is obtained after ball milling, melting, stirring and extrusion granulation are conducted, and the mercury removal bag cage is prepared through a selective thermal sintering 3D printing technology. According to the selective thermal sintering molding 3D printing mercury removal bag cage and a preparation method thereof, the mercury removal bag cage is prepared by jumping out of a filter bag mercury removal frame, changingideas, organically combining functions and a main body on one main body and loading a catalyst on a filter bag cage by adopting the 3D printing technology, so that the catalyst loading capacity is large, and the catalyst is uniformly distributed in the bag cage; micropores are fully distributed in the bag cage, so that the contact area between the bag cage and flue gas is increased; and compared with a conventional bag cage, the filter bag is more fully and uniformly supported, the stress on the surface of the filter bag is further reduced, the service life of the filter bag is prolonged, industrial large-scale production is facilitated, and the engineering application value is high.

Description

technical field [0001] The invention belongs to the technical field of coal-fired flue gas purification, and in particular relates to a selective thermal sintering forming 3D printing mercury removal bag cage and a preparation method thereof. Background technique [0002] In recent years, with the country's emphasis on environmental protection, mercury removal from coal-fired flue gas has received widespread attention. Countries, regions and industries have promulgated corresponding air pollutant emission standards for coal-fired boilers, and put forward binding indicators for mercury emission concentrations (50ug / m 3 / GB13271-2014,8ug / m 3 / DB50 / 659-2016,30ug / m 3 / DB31 / 387-2017,8ug / m 3 / DB31 / 860-2014). Therefore, it is of great significance to study the mercury removal technology of coal-fired flue gas. [0003] SCR mercury removal is the use of SCR catalysts to remove the difficult-to-remove elemental mercury (Hg 0 ) is catalyzed and oxidized to easy-to-trap ion mercu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/153B29C64/20B29C64/314B29C64/386B29C64/393B33Y10/00B33Y30/00B33Y40/10B33Y50/00B33Y50/02B33Y70/10B01D53/86B01D53/64
CPCB29C64/153B29C64/20B29C64/314B29C64/386B29C64/393B33Y10/00B33Y30/00B33Y40/10B33Y50/00B33Y70/10B33Y50/02B01D53/8665B01D2257/602
Inventor 杨嵩刘茜程广文郭中旭付康丽姚明宇赵瀚辰杨成龙蔡铭
Owner XIAN THERMAL POWER RES INST CO LTD
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