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Metal powder and metal sintering mesh composite filter element and production method thereof

A technology of metal sintered mesh and metal powder, which is applied in the field of filter elements, can solve the problems of small filtration flow rate, large filtration resistance, and small device capacity, etc., and achieve the effects of saving costs, improving stability, and reducing volume

Inactive Publication Date: 2015-08-26
徐小平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wall thickness of the homogeneous metal powder sintered filter element is generally controlled between 1-5mm. The disadvantages exposed in the production practice are mainly the large filtration resistance, the low filtration flow rate and the low capacity of the device.
At the same time, fine particles enter the internal structure of the filter element, making it difficult to blow back and regenerate, which directly leads to the failure of the filter element

Method used

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  • Metal powder and metal sintering mesh composite filter element and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] refer to figure 1 As shown, a metal powder and metal sintered mesh composite filter element is a circular tubular structure, including a metal mesh layer 1 and a metal powder layer 2 that are sequentially sintered from outside to inside. The metal mesh layer includes an outer mat-type mesh 3, an inner The mat-type net 4 and two flat-woven nets 5, wherein the mat-type net is 12x64 mesh, the outer mat-type net and the inner mat-type net have the same structure, the outer mat-type net and the inner mat-type net are vertically crossed and superimposed according to the lines, and the inner mat-type net Two plain weave nets are arranged between the inner surface of the mesh and the metal powder layer, and the mesh number of the plain weave on the side of the metal powder layer is larger than that of the plain weave on the side of the metal mesh layer among the two adjacent plain weave nets. Mesh number, that is, the mesh number of the plain weave mesh on the side of the inner...

Embodiment 2

[0040] The difference between Embodiment 2 and Embodiment 1 is that the mesh number of the plain weave on one side of the metal powder layer is 200 mesh, the metal powder layer includes a filter control layer, and the particle size mesh of the filter control layer is 300 mesh, because the filter control layer There is not much difference in the mesh number from the plain woven net, so the transition layer can be omitted, but the weight ratio of the solid metal powder particles to the liquid carrier is 0.8:1 to ensure that its viscosity is 1500mPa·s. When preparing the metal powder layer, this The ratio of the viscosity can ensure that the liquid phase carrier in the poured liquid will not leak out at the first time, ensure its uniform flow, and achieve a good effect of controlling the surface tiling.

[0041] In the preferred production and preparation method, the set temperature of the vacuum sintering furnace in step 2 is 1400° C., and the sintering time is 5 hours.

[0042]...

Embodiment 3

[0044] The difference between Embodiment 3 and Embodiment 1 is that the mesh number of the plain weave on one side of the metal powder layer is 500 mesh, the metal powder layer includes a filter control layer, and the particle size mesh of the filter control layer is 800 mesh, because the filter control layer There is not much difference in the mesh number from the plain woven net, so the transition layer can be omitted, but the specific gravity of the solid metal powder particles and the liquid phase carrier is 0.8:1, and the viscosity is guaranteed to be 1500mPa·s. When preparing the metal powder layer, this viscosity The matching ratio can ensure that the liquid phase carrier in the poured liquid will not leak out at the first time, ensure its uniform flow, and have a good surface tiling control effect.

[0045] In the preferred production and preparation method, the set temperature of the vacuum sintering furnace in step 2 is 1200° C., and the sintering time is 10 hours.

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Abstract

The invention discloses a metal powder and metal sintering mesh composite filter element which adopts a round pipe structure, and comprises a metal mesh layer and a metal powder layer which are formed through sintering in sequence from outside to inside; the metal mesh layer comprises an outer dutch wire mesh, an inner dutch wire mesh and a plurality of plain meshes; the outer dutch wire mesh and the inner dutch wire mesh are consistent in structure, and vertically crossed and stacked according to lines; the plain meshes are arranged between the inner surface of the inner dutch wire mesh and the metal powder layer. The production method comprises the following steps: 1) arranging the metal layers, 2) sintering the metal layers, 3) preparing suspension slurry, 4) preparing the metal powder layer, 5) sintering a semi-finished product, and 6) pressing the finished product. The metal powder and metal sintering mesh composite filter element has the advantages of being small in filter resistance, high in fluid flux, strong in regeneration capacity, long in service cycle, and especially suitable for being used continuously during the process of production technology, needing continuous operation, of petrochemical engineering and the like.

Description

technical field [0001] The invention relates to the field of filter elements, in particular to a metal powder and metal sintered mesh composite filter element and a production method thereof. Background technique [0002] Due to the advantages of high temperature resistance, low temperature resistance and corrosion resistance, metal filter materials are widely used in petrochemical and many other chemical processes, and their performance directly affects product quality, production efficiency and safety of production equipment, and plays an important role. For example, domestic and foreign petroleum refineries generally use metal powder sintered filter elements to filter catalyst particles in oil slurry; S-Zorb gasoline and diesel hydrodesulfurization production process also uses metal powder sintered filter elements to separate adsorbent particles. At present, most of the homogeneous metal powder sintered filter elements are produced by cold isostatic seamless tube-sinterin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B15/02B32B15/14B32B15/16B32B15/18
Inventor 徐小平
Owner 徐小平
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