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Ceramic based composite material filtering tube used for cleaning high-temp. gas smoke, and its prodn. method

A composite material and filter tube technology, applied in the field of ceramic matrix composite filter tube and its preparation, can solve the problem of unsolved toughness of the filter tube and the like

Inactive Publication Date: 2006-06-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In IGCC, gas combustion and turbine start / stop produce considerable alternating stress, and the ceramic filter tube must have high strength and toughness. The above two patents have not yet solved the toughness problem of the filter tube

Method used

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  • Ceramic based composite material filtering tube used for cleaning high-temp. gas smoke, and its prodn. method
  • Ceramic based composite material filtering tube used for cleaning high-temp. gas smoke, and its prodn. method
  • Ceramic based composite material filtering tube used for cleaning high-temp. gas smoke, and its prodn. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A nylon rod is used as the mandrel 1 with a diameter of 40 mm and a length of 500 mm. Wrap the two-dimensional aluminum silicate fiber cloth on the surface of the nylon mandrel to form a fiber preform 2 with a thickness of 5 mm. The mandrel 1 and the preform 2 are immersed in the phenolic solution, dried in the air and then dried at 120° C., the fiber preform 2 is infiltrated with phenolic formaldehyde and cured to form the phenolic fiber preform 3 . Then the core mold 1 and the phenolic fiber preform 3 are heated to 270° C., the core mold 1 melts and flows out from the phenolic fiber preform 3 , and the demoulding is completed. Heat the phenolic fiber preform 3 to 1000° C. in a vacuum furnace and keep it warm for 2 hours. After the phenolic resin decomposes, pyrolytic carbon is formed to obtain a fiber preform 4 with a pyrolytic carbon interface layer. Put the fiber preform 4 of the pyrolytic carbon cross-section layer into a chemical vapor infiltration furnace, and p...

Embodiment 2

[0030] A nylon rod is used as the mandrel 1 with a diameter of 50 mm and a length of 1000 mm. A prefabricated body 2 is formed by weaving aluminum silicate fibers with a thickness of 4 mm on the surface of the nylon mandrel. The mandrel 1 and the preform 2 are immersed in the phenolic solution, dried in the air and then dried at 120° C., the fiber preform 2 is infiltrated with phenolic formaldehyde and cured to form the phenolic fiber preform 3 . Then the core mold 1 and the phenolic fiber preform 3 are heated to 270° C., the core mold 1 melts and flows out from the phenolic fiber preform 3 , and the demoulding is completed. Heat the phenolic fiber preform 3 to 1000° C. in a vacuum furnace and keep it warm for 2 hours. After the phenolic resin decomposes, pyrolytic carbon is formed to obtain a fiber preform 4 with a pyrolytic carbon interface layer. Put the fiber preform 4 of the hot carbon interface layer into a chemical vapor infiltration furnace, and prepare a silicon carb...

Embodiment 3

[0033] A polytetrafluoroethylene rod is used as the mandrel 1 with a diameter of 60 mm and a length of 1200 mm. A prefabricated body 2 is formed by weaving aluminum silicate fibers with a thickness of 3 mm on the surface of the polytetrafluoroethylene mandrel 1 . The mandrel 1 and the preform 2 are dipped in the phenolic solution, dried in the air and then dried at 110° C., the fiber preform 2 is infiltrated with phenolic formaldehyde and cured to form the phenolic fiber preform 3 . Then the core mold 1 and the phenolic fiber preform 3 are heated to 400° C., the core mold 1 melts and flows out from the phenolic fiber preform 3 , and the demoulding is completed. Heat the phenolic fiber preform 3 to 1000° C. in a vacuum furnace and keep it warm for 2 hours. After the phenolic resin decomposes, pyrolytic carbon is formed to obtain a fiber preform 4 with a pyrolytic carbon interface layer. Put the fiber preform 4 of the pyrolytic carbon interface layer into a chemical vapor infil...

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Abstract

A composite ceramic-based filtering pipe for cleaning high-temp gas or fume has 30-50% for porosity, one blind end and one open end and is formed by continuous aluminum silicate fiber reinforced silicon carbide ceramic. Its preparing process includes such steps as braiding aluminum silicate fibers on plastic core mould to obtain a prefabricated body, dipping in phenol solution, drying in the air, solidifying, heating to fuse plastic core mould for demoulding, continuous heating to 900-1000 deg.C for thermo-decomposing phenol to obtain thermo-decomposed carbon, chemical vapor osmosis to obtain silicon carbide base and filtering pipe blank, and grinding its open end.

Description

1. Technical field [0001] The invention relates to a ceramic-based composite material filter tube and a preparation method thereof, in particular to a ceramic-based composite material filter tube for cleaning high-temperature gas flue gas and a preparation method thereof. The invention relates to a filter tube for cleaning high-temperature gas flue gas and a preparation method thereof. 2. Background technology [0002] Integrated Gasification Combined Cycle (IGCC) is a "green power generation" technology for clean and efficient utilization of coal, with a power generation efficiency of 43-45%, ten percentage points higher than traditional thermal power generation. The basic principle of IGCC is: Coal is gasified into gas with medium and low calorific value, and then purified to remove sulfide, nitride, dust and other pollutants in the gas to become clean gas fuel, and then sent to the combustion chamber of the gas turbine for combustion , heating the gas working medium to d...

Claims

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Application Information

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IPC IPC(8): B01D46/24B01D39/20C04B38/00
Inventor 陈照峰王侠严波李聪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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