CN1792412A - Ceramic based composite material filtering tube used for cleaning high-temp. gas smoke, and its prodn. method - Google Patents
Ceramic based composite material filtering tube used for cleaning high-temp. gas smoke, and its prodn. method Download PDFInfo
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- CN1792412A CN1792412A CN 200510095683 CN200510095683A CN1792412A CN 1792412 A CN1792412 A CN 1792412A CN 200510095683 CN200510095683 CN 200510095683 CN 200510095683 A CN200510095683 A CN 200510095683A CN 1792412 A CN1792412 A CN 1792412A
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- fiber preform
- screen pipe
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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
One, technical field
The present invention relates to a kind of ceramic matric composite screen pipe and preparation method thereof, particularly relate to Clean-ceramic matric composite screen pipe of a kind of coal gas of high temperature flue gas and preparation method thereof.Belong to Clean-screen pipe of coal gas of high temperature flue gas and preparation method.
Two, background technology
Integrated gasification combined cycle plants (IGCC) is clean efficient " green generating " technology utilized of coal, and its generating efficiency reaches 43 ~ 45%, is higher than ten percentage points of traditional thermal power generation.The basic principle of IGCC is: coal is through being gasificated as middle low-heat value gas, again through purifying, remove pollutants such as sulfide in the coal gas, nitride, dust, become the gaseous fuel of cleaning, send into the combustion chambers burn of gas turbine then, heated air working medium is to drive the combustion gas turbine work done, and combustion turbine exhaustion enters the waste heat boiler heated feed water, produces superheated steam and drives the steam turbine work done.
High temperature coal gas purification is the key link among the IGCC.Wet dedusting desulfurization technology is ripe relatively, yet before purification, coal gas of high temperature will be cooled earlier, causes gas heat loss, energy grade to reduce, and has influenced the whole efficiency of IGCC.Therefore, USDOE since last century the nineties support the high-temperature dry purification techniques, studies show that, high-temperature dry purify with coal gas low temperature purification technology mutually specific energy make 2 ~ 3% percentage points of the net efficiency raisings of IGCC.
Last century, the nineties began, bad and the not high problem of reliability for the thermal shock resistance that fundamentally solves the simple substance ceramic filter material, and assurance material excellent high-temperature decay resistance, American-European countries has carried out the research of high performance sintered metal porous filtering material, and U.S. PALL and MOTT company have developed Fe
3Sintering metal powder porous materials such as Al, Hastelloy alloy, 310S, Inconel 601, Britain Povair company, Belgian Bekart, U.S. US filter company have developed sintered metal fiber porous materials such as FeCrAl, Haynes230, Haynes214 respectively.Porous metals are used to gas cleaning at high temperature the earliest, yet coal gas of high temperature has strong corrosivity, cause porous metal filter short cost in service life to strengthen.The high temperature purification mode of research has cyclone dust collectors, ceramic filter, moving bed particle filter bed and the ceramic barrier filter etc. of ceramic fibre bed, grey reunion function at present, and wherein ceramic filter has entered the Demonstration Application stage.
Chinese patent CN01126499.3 (open day 2002.03.27) discloses a kind of method for preparing silicon carbide porous ceramic pipe, it is characterized in that carborundum is aggregate, the eutectic mixture of forming with feldspar, clay is a bond, active carbon and other organic matter be as the pore former material, obtains to have porous ceramic film material than high porosity and certain pore size size by injection forming.Add inorganic electrolyte and regulate pH value of slurry, proportion, viscosity, the flowability of control slurry and stable; The model that moulding is used adopts the plaster cast of specially treated; Biscuit intensity is improved by organic and inorganic binder, adopts normal pressure-sintered technology.The porous ceramic pipe porosity of preparation can reach 60-65%, and pore size is about 14 microns.Air vent channel is that solid netted perforation distributes in the body; Can change the pore size distribution by changing firing temperature.
Chinese patent CN00254658.2 (open day a 2001.06.27) discloses a kind of carborundum environmental protection dust arrester, and it comprises the carborundum filter core cylinder is set in staving and the staving.The top of staving is outlet, and the side is an inlet port, and the bottom is provided with the precipitation sewage draining exit, and filter core cylinder is erected at the staving internal upper part, the filter core cylinder upper opening, and the filter core cylinder bottom is a closed.Be equipped with the filtration synusia between top in the described staving and the filter core cylinder top.The staving inlet port is the opening along bucket wall tangential direction.
In IGCC, gas-fired and turbine start/stop and producing sizable alternate stress, and ceramic filter tube must have higher intensity and toughness, and above-mentioned two patents are the toughness problem of unresolved screen pipe still.
Three, summary of the invention
Technical problem to be solved by this invention provides the Clean-ceramic matric composite screen pipe of coal gas of high temperature flue gas of a kind of high strength and high tenacity.
This screen pipe is characterised in that an end blind hole, an end opening, internal diameter 40 ~ 70mm, wall thickness 2 ~ 5mm, length 500 ~ 1500mm.
This screen pipe is characterised in that by continuous alumina silicate fibre ceramics of silicon carbide toughened and constitutes.
This screen pipe is characterised in that 30～50% the porosity.
Another technical problem that the present invention will solve provides a kind of preparation method of above-mentioned screen pipe, it is characterized in that comprising the step of following order:
(1) core, diameter 40 ~ 70mm, long 600 ~ 1600mm.
(2) fiber preform braiding.At mandrel surface braiding alumina silicate fibre precast body, thickness 2～5mm, an end blind hole, an end opening.
(3) infiltration solidification.Core and fiber preform are flooded in phenolic aldehyde solution together, dry the back and phenolic aldehyde is solidified, obtain to infiltrate the fiber preform of phenolic aldehyde 100 ~ 140 ℃ of processing.
(4) demoulding.The fiber preform of core and infiltration phenolic aldehyde is heated in vacuum drying oven more than the plastics core fusing point, flows out the demoulding after the fusion of plastics core.
(5) phenolic aldehyde pyrolysis.After the demoulding, will infiltrate the fiber preform of phenolic aldehyde, insulation is 2 hours in 900 ~ 1000 ℃ of vacuum drying ovens, and the phenolic aldehyde pyrolysis forms RESEARCH OF PYROCARBON, obtains to have the fiber preform at RESEARCH OF PYROCARBON interface.
(6) matrix preparation.The fiber preform that will have the RESEARCH OF PYROCARBON interface is inserted in the chemical vapor infiltration poke, adopts chemical vapor infiltration to prepare silicon carbide substrate.With trichloromethyl silane and hydrogen is reacting gas, is carrier gas with hydrogen, is carrier gas with the argon gas, and the infiltration temperature is 950 ~ 1150 ℃, and time of penetration is 50 ~ 150 hours.Infiltration finishes the back and obtains ceramic matric composite screen pipe blank.
(7) port processing.Screen pipe blank 5 openend end faces are polished, and burr is destroyed with sand paper, obtains the ceramic matric composite screen pipe.
Four, description of drawings
Fig. 1 has twined the schematic diagram of alumina silicate fibre precast body for mandrel surface
Fig. 2 be flooded phenolic aldehyde solution and solidify after core and the schematic diagram of alumina silicate fibre precast body
Fig. 3 is the fiber preform schematic diagram after the demoulding and the phenolic aldehyde pyrolysis
Fig. 4 is the matrix preparation ceramic matric composite screen pipe blank schematic diagram after finishing
Label title among the above-mentioned figure: 1. core, 2. fiber preform, the 3. fiber preform of phenolic aldehyde, the 4. fiber preform of RESEARCH OF PYROCARBON boundary layer, 5. screen pipe blank.
Five, the specific embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
Nylon rod is as core 1, diameter 40mm, long 500mm.Two-dimentional alumina silicate fibre cloth is wrapped in the nylon mandrel surface forms the thick fiber preform 2 of 5mm.Core 1 and precast body 2 are flooded in phenolic aldehyde solution, dry back 120 ℃ of oven dry, infiltrate phenolic aldehyde in the fiber preform 2 and solidify to form the fiber preform 3 of phenolic aldehyde.Fiber preform 3 with core 1 and phenolic aldehyde is heated to 270 ℃ again, and core 1 fusing is flowed out from the fiber preform 3 of phenolic aldehyde, and the demoulding is finished.The fiber preform 3 of phenolic aldehyde is heated to 1000 ℃ in vacuum drying oven, is incubated 2 hours, phenolic resins decomposes the back and forms RESEARCH OF PYROCARBON, obtains having the fiber preform 4 of RESEARCH OF PYROCARBON boundary layer.The fiber preform 4 of RESEARCH OF PYROCARBON cross-sectional layers being inserted in the chemical vapor infiltration poke, adopt chemical vapor infiltration to prepare silicon carbide substrate, is reacting gas with trichloromethyl silane and hydrogen, with hydrogen is carrier gas, with the argon gas is carrier gas, and the infiltration temperature is 1000 ℃, and time of penetration is 50 hours.Infiltration finishes the back and obtains ceramic matric composite screen pipe blank 5, and ceramic matric composite screen pipe blank 5 openend end faces are polished, and burr is destroyed with sand paper, obtains the ceramic matric composite screen pipe.
After tested, this ceramic matric composite screen pipe porosity 50%.
Embodiment 2
Nylon rod is as core 1, diameter 50mm, long 1000mm.The alumina silicate fibre that braiding 4mm is thick on the nylon mandrel surface forms precast body 2.Core 1 and precast body 2 are flooded in phenolic aldehyde solution, dry back 120 ℃ of oven dry, infiltrate phenolic aldehyde in the fiber preform 2 and solidify to form the fiber preform 3 of phenolic aldehyde.Fiber preform 3 with core 1 and phenolic aldehyde is heated to 270 ℃ again, and core 1 fusing is flowed out from the fiber preform 3 of phenolic aldehyde, and the demoulding is finished.The fiber preform 3 of phenolic aldehyde is heated to 1000 ℃ in vacuum drying oven, is incubated 2 hours, phenolic resins decomposes the back and forms RESEARCH OF PYROCARBON, obtains having the fiber preform 4 of RESEARCH OF PYROCARBON boundary layer.The fiber preform 4 of hot carbon boundary layer being inserted in the chemical vapor infiltration poke, adopt chemical vapor infiltration to prepare silicon carbide substrate, is reacting gas with trichloromethyl silane and hydrogen, with hydrogen is carrier gas, with the argon gas is carrier gas, and the infiltration temperature is 1100 ℃, and time of penetration is 100 hours.Infiltration finishes the back and obtains ceramic matric composite screen pipe blank 5, and ceramic matric composite screen pipe blank 5 openend end faces are polished, and burr is destroyed with sand paper, obtains the ceramic matric composite screen pipe.
After tested, this ceramic matric composite screen pipe porosity 40%.
Embodiment 3
Teflon rod is as core 1, diameter 60mm, long 1200mm.The alumina silicate fibre that braiding 3mm is thick on polytetrafluoroethylene (PTFE) core 1 surface forms precast body 2.Core 1 and precast body 2 are flooded in phenolic aldehyde solution, dry back 110 ℃ of oven dry, infiltrate phenolic aldehyde in the fiber preform 2 and solidify to form the fiber preform 3 of phenolic aldehyde.Fiber preform 3 with core 1 and phenolic aldehyde is heated to 400 ℃ again, and core 1 fusing is flowed out from the fiber preform 3 of phenolic aldehyde, and the demoulding is finished.The fiber preform 3 of phenolic aldehyde is heated to 1000 ℃ in vacuum drying oven, is incubated 2 hours, phenolic resins decomposes the back and forms RESEARCH OF PYROCARBON, obtains having the fiber preform 4 of RESEARCH OF PYROCARBON boundary layer.The fiber preform 4 of RESEARCH OF PYROCARBON boundary layer being inserted in the chemical vapor infiltration poke, adopt chemical vapor infiltration to prepare silicon carbide substrate, is reacting gas with trichloromethyl silane and hydrogen, with hydrogen is carrier gas, with the argon gas is carrier gas, and the infiltration temperature is 950 ℃, and time of penetration is 150 hours.Infiltration finishes the back and obtains ceramic matric composite screen pipe blank 5, and ceramic matric composite screen pipe blank 5 openend end faces are polished, and burr is destroyed with sand paper, obtains the ceramic matric composite screen pipe.
After tested, this ceramic matric composite screen pipe porosity 30%.
Claims (2)
1. ceramic matric composite screen pipe that the coal gas of high temperature flue gas is Clean-, this screen pipe one end blind hole, an end opening, internal diameter 40 ~ 70mm, wall thickness 2 ~ 5mm, length 500 ~ 1500mm; It is characterized in that this screen pipe is made of continuous alumina silicate fibre ceramics of silicon carbide toughened, and 30～50% the porosity is arranged.
2. the preparation method of the Clean-ceramic matric composite screen pipe of a coal gas of high temperature flue gas is characterized in that, comprises the steps:
(1) makes core (1), diameter 40 ~ 70mm, long 600 ~ 1600mm;
(2) at plastics core (1) surface weave alumina silicate fibre precast body (2), thickness 2～5mm, an end blind hole, an end opening;
(3) core (1) and fiber preform (2) are flooded in phenolic aldehyde solution together, dry the back and phenolic aldehyde is solidified, obtain to infiltrate the fiber preform (3) of phenolic aldehyde 100 ~ 140 ℃ of processing;
(4) fiber preform (3) with core (1) and infiltration phenolic aldehyde is heated to core (1) more than the fusing point in vacuum drying oven, flows out the demoulding after core (1) fusion;
(5) after the demoulding, the fiber preform (3) that infiltrates phenolic aldehyde is incubated 2 hours in 900 ~ 1000 ℃ of vacuum drying ovens, the phenolic aldehyde pyrolysis forms RESEARCH OF PYROCARBON, obtains to have the fiber preform (4) at RESEARCH OF PYROCARBON interface;
(6) fiber preform 4 that will have the RESEARCH OF PYROCARBON interface is inserted in the chemical vapor infiltration poke, adopt chemical vapor infiltration to prepare silicon carbide substrate, with trichloromethyl silane and hydrogen is reacting gas, with hydrogen is carrier gas, with the argon gas is carrier gas, the infiltration temperature is 950 ~ 1150 ℃, and time of penetration is 50 ~ 150 hours, and infiltration finishes the back and obtains ceramic matric composite screen pipe blank (5);
(7) screen pipe blank (5) openend end face is polished, burr is destroyed with sand paper, obtains the ceramic matric composite screen pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100956834A CN100345612C (en) | 2005-11-28 | 2005-11-28 | Ceramic based composite material filtering tube used for cleaning high-temp. gas smoke, and its prodn. method |
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| CNB2005100956834A CN100345612C (en) | 2005-11-28 | 2005-11-28 | Ceramic based composite material filtering tube used for cleaning high-temp. gas smoke, and its prodn. method |
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| CN1792412A true CN1792412A (en) | 2006-06-28 |
| CN100345612C CN100345612C (en) | 2007-10-31 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101940857A (en) * | 2010-10-22 | 2011-01-12 | 合肥丰德科技有限公司 | High-temperature resistant ceramic fiber gas filter material |
| CN102580406A (en) * | 2012-03-02 | 2012-07-18 | 江苏省宜兴非金属化工机械厂有限公司 | Flue gas filter pipe and manufacturing method thereof |
| CN103880459A (en) * | 2014-02-26 | 2014-06-25 | 上海西重所重型机械成套有限公司 | Carbon, aluminum silicate ceramic fiber composite material and preparation method thereof |
| CN104436869A (en) * | 2014-11-17 | 2015-03-25 | 苏州博清高新材料有限公司 | Composite ceramic filter element and preparation process thereof |
| CN107324828A (en) * | 2017-07-24 | 2017-11-07 | 苏州宏久航空防热材料科技有限公司 | A kind of SiCf/ SiC ceramic base combined filtration pipe and preparation method thereof |
| CN108823866A (en) * | 2018-07-13 | 2018-11-16 | 青岛即发集团股份有限公司 | A kind of supercritical dyeing dyeing caldron and dyeing installation |
| CN109822718A (en) * | 2019-01-04 | 2019-05-31 | 国装新材料技术(江苏)有限公司 | Closed pore precision component manufacturing method |
| CN112221278A (en) * | 2020-09-23 | 2021-01-15 | 中国科学院金属研究所 | Power plant tail gas CO2Flue gas pre-purification system before trapping |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5196120A (en) * | 1991-05-13 | 1993-03-23 | Minnesota Mining And Manufacturing Company | Ceramic-ceramic composite filter |
| DE19713068A1 (en) * | 1997-03-27 | 1998-10-01 | Ecm Ingenieur Unternehmen Fuer | Process for the production of hot gas filter elements and the use of the filter for hot gas filtration of flue gases |
| CN1341578A (en) * | 2001-08-17 | 2002-03-27 | 中国科学院上海硅酸盐研究所 | Method for preparing silicon carbide porous ceramic pipe |
| CN1299797C (en) * | 2004-12-31 | 2007-02-14 | 华南理工大学 | Porous inorganic microstraining core and preparation method thereof |
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2005
- 2005-11-28 CN CNB2005100956834A patent/CN100345612C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101940857A (en) * | 2010-10-22 | 2011-01-12 | 合肥丰德科技有限公司 | High-temperature resistant ceramic fiber gas filter material |
| CN101940857B (en) * | 2010-10-22 | 2014-04-16 | 合肥丰德科技股份有限公司 | High-temperature resistant ceramic fiber gas filter material |
| CN102580406A (en) * | 2012-03-02 | 2012-07-18 | 江苏省宜兴非金属化工机械厂有限公司 | Flue gas filter pipe and manufacturing method thereof |
| CN102580406B (en) * | 2012-03-02 | 2014-02-26 | 江苏省宜兴非金属化工机械厂有限公司 | Flue gas filter pipe and manufacturing method thereof |
| CN103880459B (en) * | 2014-02-26 | 2016-04-27 | 上海西重所重型机械成套有限公司 | A kind of carbon, alumina-silicate ceramic fibre matrix material and preparation method thereof |
| CN103880459A (en) * | 2014-02-26 | 2014-06-25 | 上海西重所重型机械成套有限公司 | Carbon, aluminum silicate ceramic fiber composite material and preparation method thereof |
| CN104436869A (en) * | 2014-11-17 | 2015-03-25 | 苏州博清高新材料有限公司 | Composite ceramic filter element and preparation process thereof |
| CN104436869B (en) * | 2014-11-17 | 2016-06-08 | 苏州博清高新材料有限公司 | Composite ceramic filter core and preparation technology thereof |
| CN107324828A (en) * | 2017-07-24 | 2017-11-07 | 苏州宏久航空防热材料科技有限公司 | A kind of SiCf/ SiC ceramic base combined filtration pipe and preparation method thereof |
| CN107324828B (en) * | 2017-07-24 | 2020-08-25 | 苏州宏久航空防热材料科技有限公司 | SiCf/SiC ceramic matrix composite filter tube and preparation method thereof |
| CN108823866A (en) * | 2018-07-13 | 2018-11-16 | 青岛即发集团股份有限公司 | A kind of supercritical dyeing dyeing caldron and dyeing installation |
| CN109822718A (en) * | 2019-01-04 | 2019-05-31 | 国装新材料技术(江苏)有限公司 | Closed pore precision component manufacturing method |
| CN112221278A (en) * | 2020-09-23 | 2021-01-15 | 中国科学院金属研究所 | Power plant tail gas CO2Flue gas pre-purification system before trapping |
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| CN100345612C (en) | 2007-10-31 |
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