A kind of activation sintering preparation method of metal composite porous membrane tube

A metal composite, activated sintering technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of low service life of FeAl-based filter elements, high preparation cost of metal microporous membrane, and easy condensation of coal tar. Achieve the effect of easing the contradiction between high permeability and high filtration precision, prolonging stable operation time and improving the overall filtration effect

Active Publication Date: 2022-03-08
广州赛隆增材制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the characteristics of high dust content in medium and low temperature pyrolysis gas and easy condensation of coal tar, the FeAl-based filter elements made by cold isostatic pressing have problems such as low filtration accuracy and poor back-blowing regeneration performance. This further leads to the low service life of the FeAl-based filter element, and it is difficult to meet the design requirements; at the same time, the high preparation cost and limited variety specifications of the metal microporous membrane cannot meet the industrialization and application, especially in harsh media environments and such as high temperature , complex multiphase environment and other new fields

Method used

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  • A kind of activation sintering preparation method of metal composite porous membrane tube
  • A kind of activation sintering preparation method of metal composite porous membrane tube
  • A kind of activation sintering preparation method of metal composite porous membrane tube

Examples

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Effect test

Embodiment 1

[0024] In this specific example 1, a Fe20Cr5Al composite porous membrane tube was prepared with a Fe20Cr5Al fiber tube with a filtration accuracy of 20 μm, a diameter of 80 mm, a height of 500 mm, and a thickness of about 2 mm (provided by Northwest Nonferrous Metals Research Institute).

[0025] The invention relates to a method for preparing a metal composite porous membrane tube by activation sintering, comprising the following steps:

[0026] Step 1, preparing metal powder slurry.

[0027] The commercially available Fe20Cr5Al metal powder with more than 80% particle size of 20-30 μm is added into the organic solvent, and then stirred evenly with a stirrer for 30 minutes to prepare the metal powder slurry. Wherein, the weight ratio of the Fe20Cr5Al metal powder to the organic solvent is 3:1, and the organic solvent is selected from one of polyvinyl alcohol, terpineol, carbon tetrachloride or glycerin.

[0028] Step 2, spraying the metal powder slurry.

[0029] Spray the m...

Embodiment 2

[0039] In this specific example 2, a Ni16Cr5Al composite porous membrane tube was prepared with a Ni16Cr5Al powder tube with a filtration accuracy of 5 μm, a diameter of 60 mm, a height of 1000 mm, and a thickness of about 2.5 mm (provided by Northwest Nonferrous Metals Research Institute).

[0040] The invention relates to a method for preparing a metal composite porous membrane tube by activation sintering, comprising the following steps:

[0041] Step 1, preparing metal powder slurry.

[0042] The commercially available Ni16Cr5Al metal powder with a particle size of more than 80% of 0.2-22 μm is added into an organic solvent, and then stirred evenly with a stirrer for 40 minutes to prepare a metal powder slurry. Wherein, the weight ratio of the Ni16Cr5Al metal powder to the organic solvent is 1:1, and the organic solvent is selected from one of polyvinyl alcohol, terpineol, carbon tetrachloride or glycerin.

[0043] Step 2, spraying the metal powder slurry.

[0044] Spray...

Embodiment 3

[0054] In this specific example 3, a Ni16Cr5Al composite porous membrane tube was prepared with a Ni16Cr5Al powder tube with a filtration accuracy of 5 μm, a diameter of 60 mm, a height of 1000 mm, and a thickness of about 2.5 mm (provided by Northwest Nonferrous Metals Research Institute).

[0055] The invention relates to a method for preparing a metal composite porous membrane tube by activation sintering, comprising the following steps:

[0056] Step 1, preparing metal powder slurry.

[0057] The commercially available Ni16Cr5Al metal powder with a particle size of more than 80% of 0.2-22 μm is added into an organic solvent, and then stirred evenly with a stirrer for 40 minutes to prepare a metal powder slurry. Wherein, the weight ratio of the Ni16Cr5Al metal powder to the organic solvent is 1:1, and the organic solvent is selected from one of polyvinyl alcohol, terpineol, carbon tetrachloride or glycerin.

[0058] Step 2, spraying the metal powder slurry.

[0059] Spray...

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Abstract

The invention provides a method for preparing a metal composite porous membrane tube by activation sintering, which comprises the following steps: Step 1, adding Fe20Cr5Al or Fe3Al or Ni16Cr5Al metal powder into polyvinyl alcohol or terpineol or carbon tetrachloride or glycerin organic solvent Prepare the metal powder slurry; step 2, spray the metal powder slurry onto the outer surface of the base pipe, and dry to form a metal powder porous layer; step 3, prepare an activator; step 4, take the activator and spray it on the porous metal powder The outer surface of the layer is dried to make a metal composite porous membrane tube; Step 5, sintering the metal composite porous membrane tube in a vacuum furnace. The invention combines the mechanical properties and high permeability of the base tube with the filtration performance of the membrane layer, and through the control of the thickness of the membrane layer, reconciles the contradiction between air flow and filtration accuracy, simple equipment, simple operation steps and good use effect .

Description

technical field [0001] The invention relates to the technical field of metal porous materials and their preparation, in particular to an activation sintering preparation method of a metal composite porous membrane tube. Background technique [0002] The service temperature based on the metal microporous membrane can be as high as 600°C, and it can purify the high-temperature dust-containing gas to a dust concentration of less than 10mg / m under high-temperature conditions 3 The level of filtration accuracy is as high as 0.1 μm, and the filtration pressure drop can be controlled within tens of kilopascals. Therefore, metal microporous membranes have become a new type of separation medium with high separation efficiency, low energy consumption, long life, and easy With a series of unique advantages such as cleaning and corrosion resistance, it has been widely used in food, beverage, chemical, metallurgy, material, environmental protection and other industries. [0003] At the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/10B01D69/02B01D71/02
CPCB01D67/0041B01D69/10B01D69/02B01D71/022B01D2325/24
Inventor 汪强兵李广忠郭瑜孙涛
Owner 广州赛隆增材制造有限责任公司
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