CN115700134A - Method for manufacturing novel ceramic fiber tube - Google Patents
Method for manufacturing novel ceramic fiber tube Download PDFInfo
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- CN115700134A CN115700134A CN202211432617.1A CN202211432617A CN115700134A CN 115700134 A CN115700134 A CN 115700134A CN 202211432617 A CN202211432617 A CN 202211432617A CN 115700134 A CN115700134 A CN 115700134A
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Abstract
The invention discloses a method for manufacturing a novel ceramic fiber tube, which comprises a ceramic fiber white tube forming stage and a ceramic fiber catalyst tube forming stage; wherein the ceramic fiber white pipe is composed of ceramic fibers and auxiliary materials; the ceramic fiber catalyst tube is formed by adding a catalyst into the ceramic fiber white tube. According to the manufacturing method of the novel ceramic fiber pipe, the manufactured and molded ceramic fiber pipe is high in dust removal, denitration and desulfurization efficiency; the requirements of enterprises and environmental protection high-voltage policies can be simultaneously considered, and the device is suitable for various working conditions; the ceramic fiber tube manufactured by adopting the external forming process has the advantages that the ceramic film layer is attached to the outermost layer of the ceramic fiber tube, so that the impact of dust and a desulfurizing agent on the surface of the ceramic fiber tube can be prevented, and the service life of the ceramic fiber tube is prolonged.
Description
Technical Field
The invention relates to the technical field of ceramic tube manufacturing, in particular to a manufacturing method of a novel ceramic fiber tube.
Background
The environmental protection high-voltage policy is inclined from the thermal power industry to the non-electric industry from 2017, and the market of environmental protection projects in the non-electric industry is released. Most of the existing waste gas treatment technologies are mature technologies in the thermal power industry, but the flue gas working conditions in the non-electric industry are complex and changeable, and various defects exist in the process of converting the waste gas treatment technologies in the thermal power industry into the non-electric industry.
The waste gas treatment technology mainly comprises desulfurization, denitration and dust removal. Wherein, the desulfurization process mainly comprises a dry method, a semi-dry method and a wet method; the denitration process mainly comprises SNCR and SCR; the dust removal is mainly cloth bag dust removal. The combination of the three processes is often a requirement for an enterprise, but different working conditions of different industries, such as temperature range, removal efficiency, stable operation, full utilization of energy, cost reduction and operation cost, have great requirements on the composition of the processes, and under the condition, particularly in the non-electric industry, the ceramic integrated waste gas treatment technology is developed, and the core product is a ceramic fiber pipe. The ceramic fiber pipe manufactured by the process has uneven outer surface, needs to be subjected to secondary roundness processing, can reduce the service life of the ceramic fiber pipe through continuous impact of dust and a desulfurizer on the outer surface of the ceramic fiber pipe in the using process, and can influence the filtering air speed although a layer of hard agent is coated on the surface of the processed ceramic pipe to enhance the wear resistance in the later period.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a novel method of making a ceramic fiber tube.
The invention provides a method for manufacturing a novel ceramic fiber tube, which comprises a ceramic fiber white tube forming stage and a ceramic fiber catalyst tube forming stage; wherein the ceramic fiber white pipe is composed of ceramic fibers and auxiliary materials; the ceramic fiber catalyst tube is formed by adding a catalyst into the ceramic fiber white tube.
Preferably, the method of the ceramic fiber white tube forming stage comprises the following steps:
1) Uniformly stirring ceramic fibers, auxiliary materials and water in a stirring tank according to the proportion and the corresponding time to prepare a slurry state;
2) Starting a ceramic fiber tube forming machine, starting a vacuumizing device, and pumping a cavity of the forming machine into a negative pressure state;
3) Opening a slurry outlet valve, pumping the slurry into a cavity of a ceramic fiber pipe forming machine through a flow pump, and attaching ceramic fibers to the interior of a porous mold of a ceramic pipe to form under a negative pressure state;
4) The formed wet ceramic tube enters drying equipment for baking, and the wet ceramic tube can be formed after drying;
5) Clamping the dried ceramic tube on a special curing device, and respectively dipping curing agents into the flange end and the plug end of the dried ceramic tube by rotating the dried ceramic tube, wherein the length range of the dipped curing agents is 100-250mm;
6) Dipping the two ends of the dried ceramic tube into a curing pool containing the curing agent for standing for 30-60 s for 1-6 times respectively, and then completely absorbing the curing agent;
7) Putting the solidified ceramic tube on a grill, pushing the ceramic tube into baking equipment, and carrying out solidification and drying treatment; baking at 80-150 deg.C for 3-8h, and taking out to obtain the final product of ceramic fiber white tube.
Preferably, the ceramic fiber is composed of one or more of aluminum silicate fiber, alumina fiber or zirconia fiber; the auxiliary materials are composed of one or more of aluminum powder, carboxymethyl cellulose, modified starch or silica sol.
Preferably, the curing agent is resin or silica sol polymer material.
Preferably, the method of the forming stage of the ceramic fiber catalyst tube includes the steps of:
1) The solidified ceramic fiber white tubes are placed on a special roller trolley in a layered mode, and the roller trolley can rotate the ceramic fiber white tubes placed on the roller trolley along the respective central axis of the ceramic fiber white tubes;
2) Feeding the catalyst into a catalyst spray gun through a catalyst conveying system;
3) Horizontally moving and vertically lifting the catalyst spray gun by using lifting equipment for impregnation, and driving the catalyst into the pipe wall of the rotating ceramic fiber white pipe on the special roller trolley layer by layer;
4) Directly pushing the dipped ceramic fiber white tube with a roller trolley into an oven for drying; drying for 4-24h at the set drying temperature of 80-180 ℃ to ensure that the catalyst is completely dried and attached to the ceramic fiber, and thus the finished product of the ceramic fiber catalyst tube, namely the final ceramic fiber tube, can be obtained.
Preferably, the catalyst consists of vanadium pentoxide, titanium dioxide, thiourea, tween, ammonium chloride, ammonium vanadate, diethylamine, zeolite and water, and has a denitration function.
Preferably, the catalyst is one or more of platinum, palladium or rhodium, and has the function of removing organic volatile gases.
Preferably, the catalyst is one or more of manganese, iron, cerium, molybdenum, copper or nickel, and is suitable for low-temperature environment containing moisture.
Compared with the prior art, the invention has the beneficial effects that:
the novel ceramic fiber tube manufacturing method has the advantages that (1) the dust removal efficiency is high, the wall thickness of the ceramic fiber catalyst tube reaches 20mm, and as a porous mold external forming process is adopted, namely a ceramic fiber white tube is formed in the porous mold, a ceramic membrane is naturally formed on the outermost layer of the ceramic fiber white tube, and is a hard thin film layer, when a system runs, the impact of dust and a desulfurizer on the surface of the ceramic fiber tube can be prevented, and the service life of the ceramic fiber tube is prolonged; the hard film layer on the outermost layer has smaller pores than the inner layer, so that microparticle dust can be effectively blocked, and the filtering precision can reach 5mg/Nm < 3 >; the dense ceramic membrane on the outer layer can treat particles above submicron level, the compactness of the ceramic membrane can prevent the deep penetration of dust, and the service life of the ceramic fiber catalyst tube is prolonged; the ceramic fiber catalyst tube is used for surface filtration, and the ash removal effect is excellent;
(2) The denitration efficiency is high, the ceramic fiber catalyst tube is treated by adopting a liquid nano-scale catalyst and a special spraying technology thereof, the catalyst is uniformly distributed in the ceramic tube, and the catalytic performance is excellent; the catalyst is dipped on the surface of the ceramic fiber in the ceramic tube to provide a reaction active site and the contact area of the catalyst and the flue gas is tens of times of that of the traditional honeycomb or plate catalyst; the retention time of the flue gas passing through the ceramic pipe wall is as long as 12s (the retention time of the flue gas in the traditional SCR denitration process is about 3-4 s), the reaction time is sufficient, and the treatment efficiency is high;
(3) The desulfurization efficiency is high, and the high-efficiency desulfurization performance can be ensured by adopting a high-efficiency desulfurizing agent and combining primary desulfurization in a system flue and secondary desulfurization of a fixed bed on the outer surface layer of the ceramic tube;
(4) The ceramic fiber catalyst tube manufactured by the manufacturing method of the novel ceramic fiber tube belongs to a porous gradient ceramic fiber composite membrane filter element and consists of a ceramic support body with large aperture, high strength and high air permeability and a ceramic fiber composite filter membrane with high filtering precision; the service life is long, the ceramic fiber catalyst tube base material is inorganic salt, mineral fiber and the like, is high temperature resistant and almost has inertia to all chemicals; the ceramic catalyst pipe is firstly subjected to efficient dust removal and then is subjected to denitration by spraying the catalyst on the inner side, the catalyst is almost not contacted with dust, and the heavy metal and alkali metal poisoning resistance effect is excellent;
(5) After the ceramic fiber tube is formed, the hard film layer on the surface of the outermost layer is smooth, and later secondary processing is not needed, so that the production time and the cost are reduced; at present, because a plurality of ceramic tubes belong to the internal forming process in the industry, the surface needs to be subjected to secondary processing roundness, so that the production time and the cost are increased.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a flow chart of a method for making the novel ceramic fiber tube.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, an embodiment of the present invention provides a method for manufacturing a novel ceramic fiber tube, including a ceramic fiber white tube forming stage and a ceramic fiber catalyst tube forming stage; wherein the ceramic fiber white pipe is composed of ceramic fibers and auxiliary materials; the ceramic fiber catalyst tube is composed of a ceramic fiber white tube and a catalyst.
In a preferred embodiment, the method of the forming stage of the ceramic fiber white tube comprises the following steps:
1) Uniformly stirring ceramic fibers, auxiliary materials and water in a stirring tank according to the proportion and the corresponding time to prepare a slurry state;
2) Starting a ceramic fiber tube forming machine, starting a vacuumizing device, and pumping a cavity of the forming machine into a negative pressure state;
3) Opening a slurry outlet valve, pumping the slurry into a cavity of a ceramic fiber pipe forming machine through a flow pump, and forming the ceramic fibers in a layer-by-layer mode in a porous mold of the ceramic pipe under the negative pressure state;
the ceramic fiber white pipe extends into the porous mold through the main shaft to spray slurry, under the action of the porous mold, ceramic fibers are formed in the porous mold in a layered mode through external vacuum suction filtration, and in the forming process, external vacuum is always acted, so that a ceramic membrane is generated on the surface of the ceramic fiber white pipe, the ceramic membrane is a hard thin film layer, pores on the pipe wall of the formed ceramic fiber white pipe are gradually increased from the outside to the inside along with the gradual reduction of the slurry and the reduction of vacuum pressure, and the external hard thin film layer can prevent dust and desulfurizer from impacting the surface of the ceramic fiber pipe when the system runs;
the external hard film layer has smaller pores than the internal hard film layer, so that microparticle dust can be effectively blocked, and the filtering precision can reach 5mg/Nm3.
Because the manufacturing method of the ceramic fiber white tube adopts the external forming mode of the porous mold, the ceramic film of one layer generated on the outermost layer of the ceramic fiber white tube has the characteristic of uniformly distributed micro-convex points.
4) The formed wet ceramic tube enters drying equipment for baking, and the wet ceramic tube can be formed after drying;
in order to adapt to different working conditions, under the specific conditions of ceramic fiber pipe installation mode and blowing cleaning, the flange end and the plug end which are easy to be impacted or clamped and cracked and disintegrated are prevented from being required to be solidified, and the integral strength of the manufactured ceramic fiber filter pipe is improved; the concrete curing mode is as follows:
1) Clamping the dried ceramic tube on a special curing device, and respectively impregnating curing agents into the flange end and the plug end of the dried ceramic tube by rotating the dried ceramic tube, wherein the length range of the impregnated curing agents is 100-250mm;
2) Dipping the two ends of the dried ceramic tube into a curing pool containing the curing agent for standing for 30-60 s for 1-6 times respectively, and then completely absorbing the curing agent;
3) Placing the cured ceramic tube on a grill, pushing the cured ceramic tube into baking equipment, and performing curing and drying treatment; baking for 3-8h at 80-150 ℃ and taking out to obtain the finished product of the ceramic fiber white tube.
And (3) placing the ceramic fiber white pipe after solidification on a flange grinding device, and carrying out fine grinding treatment on the flange end to achieve the accuracy of installation.
The main effects of the ceramic fiber white tube product are as follows:
the product application is as follows: the method is mainly used for ultralow dust purification and acidic component removal of the kiln smoke;
the applicable temperature is as follows: the smoke temperature of the common filter element is suitable for 200-1000 ℃, and the temperature of the filter element of the impregnated waterproof layer is lower than 200 ℃;
the product is characterized in that: the integration of a ceramic multi-tube bundle system can realize high-efficiency dust removal and high-efficiency deacidification; high temperature resistance; the service life is long;
purifying effect: less than 5mg/Nm for purifying smoke dust 3 The efficiency of the acid component is more than 95 percent.
A typical process comprises the following steps: system process of adsorbent conditioning, ceramic fiber white pipe, medium-temperature and low-temperature SCR catalyst
The process has the advantages that: the ultralow emission of multiple pollutants in the medium-low temperature flue gas, such as efficient dust removal, efficient deacidification, efficient denitration and the like, is solved;
purifying effect: purified dust is less than 5mg/Nm 3 The efficiency of the acidic component is more than 95 percent and the denitration rate reaches more than 95 percent.
In a preferred embodiment, the ceramic fibers are composed of one or more of mineral fibers such as aluminum silicate fibers, aluminum oxide fibers or zirconium oxide fibers; the auxiliary materials comprise one or more of aluminum powder, carboxymethyl cellulose, modified starch or silica sol.
In a preferred embodiment, the curing agent is a polymer material having a curing hardness function, such as resin or silica sol.
The method of the ceramic fiber catalyst tube forming stage is that the ceramic fiber white tube is added with catalyst to form the final ceramic fiber tube finished product, which comprises the following steps:
1) The solidified ceramic fiber white tubes are placed on a special roller trolley in a layered mode, and the roller trolley can rotate the ceramic fiber white tubes placed on the roller trolley along the respective central axis of the ceramic fiber white tubes;
2) Catalyst is conveyed into a catalyst spray gun through a catalyst conveying system, and the catalyst spray gun is a long-rod spray gun and can extend into the ceramic fiber white pipe;
3) Horizontally moving and vertically lifting the catalyst spray gun by using lifting equipment for impregnation, and driving the catalyst into the pipe wall of the rotating ceramic fiber white pipe on the special roller trolley layer by layer; the ceramic fiber white pipe rotates in real time, and the catalyst is uniformly sprayed on the wall surface of the inner side of the ceramic fiber white pipe through the catalyst spray gun, so that the catalytic performance is excellent;
4) Directly pushing the dipped ceramic fiber white tube with a roller trolley into an oven for drying; drying for 4-24h at the set drying temperature of 80-180 ℃ to ensure that the catalyst is completely dried and attached to the ceramic fiber, and thus the finished product of the ceramic fiber catalyst tube, namely the final ceramic fiber tube, can be obtained.
The main effects of the ceramic fiber catalyst tube are as follows:
the product application is as follows: the method is used for high-efficiency desulfurization, denitrification and dedusting of the flue gas of the industrial kiln and furnace, and purification of dioxin and other acidic components;
purifying effect: purified dust is less than 5mg/Nm 3 The efficiency of the acidic component is more than 95%, and the denitration rate is more than 95%;
the applicable temperature is as follows: is suitable for the range of the flue gas temperature of 260-400 ℃;
the application range is as follows: glass kilns, boilers, coking furnaces, sintering machines, garbage disposal, and the like;
a typical process comprises the following steps: reducing agent ammonia water, adsorbent conditioning and ceramic fiber catalyst tube reaction kettle integrated process;
the process is characterized in that: the method mainly solves the problem of synergistic treatment of multiple pollutants in the flue gas, and can efficiently remove smoke dust, sulfides, nitrides and the like in the flue gas;
purifying effect: purified dust is less than 5mg/Nm 3 The efficiency of the acid component is more than 95 percent, the denitration rate is more than 95 percent, and the dioxin removal rate is more than 99 percent.
The ceramic fiber catalyst tube mainly comprises a ceramic fiber white tube and a catalyst. According to different requirements, catalyst catalysts with different functions can be dipped on the pipe wall of the ceramic fiber white pipe, if a special catalyst with a denitration function is required, the main components of the catalyst are vanadium pentoxide, titanium dioxide, thiourea, tween, ammonium chloride, ammonium vanadate, diethylamine, zeolite, water and the like; if the catalyst is required to be capable of removing the organic volatile gas, the catalyst mainly contains one or more of platinum, palladium, rhodium or other rare earth elements; if the catalyst is suitable for low-temperature environment containing moisture, the catalyst component contains one or more of manganese, iron, cerium, molybdenum, copper and nickel.
The ceramic fiber pipe manufactured by the manufacturing method of the novel ceramic fiber pipe is an environment-friendly system process core product suitable for the requirement of non-electric industry smoke emission, the process characteristic of the product is utilized, the requirement of a national environment-friendly form can be met, the requirement of an enterprise is adapted, and the specific advantages are mainly embodied:
1. the dust removal efficiency is high: the wall thickness of the ceramic catalyst tube reaches 20mm, and the outer layer is a compact ceramic membrane which can treat particles with the size of more than submicron. The compactness of the ceramic membrane can prevent the deep penetration of dust and prolong the service life of the ceramic catalyst tube; the ceramic catalyst tube is surface filtering, and the ash removal effect is excellent.
2. The denitration efficiency is high: the ceramic catalyst tube is treated by adopting a liquid nano-scale catalyst and a special spraying technology thereof, the catalyst is uniformly distributed in the ceramic tube, and the catalytic performance is excellent; the catalyst is dipped on the surface of the ceramic fiber in the ceramic tube to provide a reaction active site and the contact area of the catalyst and the flue gas is tens of times of that of the traditional honeycomb or plate catalyst; the residence time of the flue gas passing through the ceramic pipe wall is as long as 12s (the residence time of the flue gas in the traditional SCR denitration process is about 3-4 s), the reaction time is sufficient, and the treatment efficiency is high.
3. The desulfurization efficiency is high: the high-efficiency desulfurizing agent is adopted, and the primary desulfurization in a system flue and the secondary desulfurization of a fixed bed on the outer surface layer of the ceramic tube are combined, so that the high-efficiency desulfurization performance can be ensured.
4. The running resistance is low: the ceramic catalyst tube belongs to porous gradient ceramic fiber composite membrane filter element, and is composed of ceramic support body with large aperture, high strength and high air permeability and ceramic fiber composite filter membrane with high filter precision.
5. The service life is long: the ceramic catalyst tube base material is inorganic salt, mineral fiber and the like, is high temperature resistant and almost has inertia to all chemicals; the ceramic catalyst pipe is firstly used for efficiently removing dust and then is sprayed with the catalyst for denitration at the inner side, the catalyst is almost not contacted with dust, and the heavy metal and alkali metal poisoning resistance effect is excellent.
6. The modularized design is adopted: the reaction kettle modules run independently without influencing each other, and the single reaction kettle module can realize online maintenance. When the emission standard is improved, equipment is not required to be repeatedly built, and only the reaction kettle module is required to be added.
7. The integrated process flow is short, the occupied area is small, the number of fault points is small, and the maintenance is simple.
8. The electromechanical equipment is few, and the running cost is low.
9. And a perfect control system is adopted, so that the operation is simpler and more convenient.
10. Mature materials and equipment are adopted, so that the cost is reduced, and the investment is saved.
11. The operation elasticity is wide, and the adaptive load change is large.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood broadly, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A method for manufacturing a novel ceramic fiber tube is characterized by comprising a ceramic fiber white tube forming stage and a ceramic fiber catalyst tube forming stage; wherein the ceramic fiber white pipe is composed of ceramic fibers and auxiliary materials; the ceramic fiber catalyst tube is formed by adding a catalyst into the ceramic fiber white tube.
2. The method for manufacturing the novel ceramic fiber tube as claimed in claim 1, wherein the method of the forming stage of the ceramic fiber white tube comprises the following steps:
1) Uniformly stirring ceramic fibers, auxiliary materials and water in a stirring tank according to the proportion and the corresponding time to prepare a slurry state;
2) Starting a ceramic fiber tube forming machine, starting a vacuumizing device, and vacuumizing a cavity of the forming machine to be in a negative pressure state;
3) Opening a slurry outlet valve, pumping the slurry into a cavity of a ceramic fiber pipe forming machine through a flow pump, and attaching ceramic fibers to the interior of a porous mold of a ceramic pipe to form under a negative pressure state;
4) The formed wet ceramic tube enters drying equipment for baking, and the ceramic tube can be formed after drying;
5) Clamping the dried ceramic tube on a special curing device, and respectively dipping curing agents into the flange end and the plug end of the dried ceramic tube by rotating the dried ceramic tube, wherein the length range of the dipped curing agents is 100-250mm;
6) Dipping the two ends of the dried ceramic tube into a curing pool containing the curing agent for standing for 30-60 s for 1-6 times respectively, and then completely absorbing the curing agent;
7) Placing the cured ceramic tube on a grill, pushing the cured ceramic tube into baking equipment, and performing curing and drying treatment; baking for 3-8h at 80-150 ℃ and taking out to obtain the finished product of the ceramic fiber white tube.
3. The method for manufacturing the novel ceramic fiber pipe as claimed in claim 2, wherein the ceramic fibers are composed of one or more of aluminum silicate fibers, aluminum oxide fibers or zirconium oxide fibers; the auxiliary material is composed of one or more of aluminum powder, carboxymethyl cellulose, modified starch or silica sol.
4. The method for manufacturing the novel ceramic fiber tube as claimed in claim 2, wherein the curing agent is resin or silica sol polymer material.
5. The method for manufacturing a novel ceramic fiber tube as claimed in claim 2, wherein the method of the forming stage of the ceramic fiber catalyst tube comprises the steps of:
1) The solidified ceramic fiber white tubes are placed on a special roller trolley in a layered mode, and the roller trolley can rotate the ceramic fiber white tubes placed on the roller trolley along the respective central axis of the ceramic fiber white tubes;
2) Feeding the catalyst into a catalyst spray gun through a catalyst conveying system;
3) Horizontally moving and vertically lifting the catalyst spray gun by using lifting equipment for impregnation, and driving the catalyst into the pipe wall of the rotating ceramic fiber white pipe on the special roller trolley layer by layer;
4) Directly pushing the impregnated ceramic fiber white tube together with a roller trolley into an oven for drying; drying for 4-24h at the set drying temperature of 80-180 ℃ to ensure that the catalyst is completely dried and attached to the ceramic fiber, and thus the finished product of the ceramic fiber catalyst tube, namely the final ceramic fiber tube, can be obtained.
6. The method for manufacturing the novel ceramic fiber tube according to claim 5, wherein the catalyst is composed of vanadium pentoxide, titanium dioxide, thiourea, tween, ammonium chloride, ammonium vanadate, diethylamine, zeolite and water, and has a denitration function.
7. The method of claim 5, wherein the catalyst is one or more of platinum, palladium, and rhodium, and has a function of removing organic volatile gases.
8. The method for manufacturing a novel ceramic fiber tube as claimed in claim 5, wherein the catalyst is one or more of manganese, iron, cerium, molybdenum, copper or nickel, and is suitable for low-temperature environment containing moisture.
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| CN202211432617.1A CN115700134A (en) | 2022-11-16 | 2022-11-16 | Method for manufacturing novel ceramic fiber tube |
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| CN202211432617.1A CN115700134A (en) | 2022-11-16 | 2022-11-16 | Method for manufacturing novel ceramic fiber tube |
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