CN109745857B - Catalyst carrier, catalyst composite filter element, and preparation method and device thereof - Google Patents
Catalyst carrier, catalyst composite filter element, and preparation method and device thereof Download PDFInfo
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- 238000005096 rolling process Methods 0.000 claims description 8
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- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention provides a catalyst carrier, a catalyst composite filter element and a preparation method and a device thereof, wherein a fiber layer is formed by fiber paper shaft winding and is matched with an auxiliary carrier with bonding property to form a self-support, and the fiber paper has good filtering performance, good high-temperature stability and low price; in addition, the auxiliary carrier can play a role in fixing the main carrier to avoid the phenomenon of transmitting migration or damage of the catalyst in the use process, and on the other hand, the auxiliary carrier can also load active components, so that the proportion of the loaded active components is improved, and the catalytic performance is further improved; furthermore, the preparation process is simple, the process cost and the material cost are low, and the catalyst has excellent filtering performance and catalytic performance.
Description
Technical Field
The invention relates to the technical field of high-temperature gas integrated purification, in particular to a catalyst carrier, a catalyst composite filter element and a preparation method and a device thereof.
Background
In many fields such as biomass gasification, petroleum catalytic cracking, garbage incineration, coal gasification and the like, gases in various processes and high-temperature flue gas discharged to the atmosphere generally contain dust particles and gaseous pollutants, and the gaseous pollutants mainly comprise NO x 、SO 2 VOCs, etc., according to the environmental protection requirement, the pollutant in the gas needs to be purified, for example, the emission concentration of the particulate matters in the emission standard of the atmospheric pollutant of the thermal power plant is required to be not higher than 30mg/m 3 ，NO x Not higher than 100mg/m 3 . At present, dust particles are mainly filtered and separated through a filter element, and the filter element comprises a filter bag, a metal filter element, a ceramic powder filter element and a ceramic fiber filter element, so that the particles with the particle diameter of more than 1um can be effectively filtered, wherein the ceramic powder filter element and the ceramic fiber filter element have good thermal stability, chemical stability and thermal shock resistance, and are widely applied. NO (NO) x At present, selective Catalytic Reduction (SCR) technology is mainly adopted for removing and purifying, and NH is introduced into high-temperature flue gas 3 NO is produced by a catalyst at a temperature of 200-450 DEG C x And NH 3 Oxidation-reduction reaction occurs to produce N 2 And H 2 O has higher purification efficiency, generally more than 85 percent, and the catalyst is generally a vanadium-titanium catalyst, is mature and is a main catalyst in the field of industrial denitration.
The traditional high-temperature gas purification process has the advantages that the dust removal and the catalytic denitration are carried out in two independent operation units, and the problems of complex process, high investment cost, high energy consumption, large occupied area and the like exist, so that the integrated dust removal and denitration is of great significance. Catalytic composite filter elements, i.e. denitration catalysts are loaded on the filter to form a filter with NO removal x The functional filter element can integrate dust removal and catalytic denitration, realize the multifunction of an operation unit, solve the problem existing in step-by-step purification, and have great application prospects. When high-temperature flue gas flows through the element, dust particles are trapped on the outer surface of the element to form a dust layer, after the pressure drop reaches a certain value, the dust layer is separated by applying a reverse airflow through pulse back blowing, and then the dust layer is reformed to be continuously circulated, wherein the flue gas is formedNO of (2) x Then flows through the inner pore canal of the element and reacts with the reducing agent NH under the action of the catalyst 3 React to produce nontoxic and pollution-free N 2 And H 2 O。
The existing catalytic composite filter element applied industrially has the problems of large pressure drop, unsatisfactory catalytic performance, short service life, high price and the like, and is mainly attributed to a series of problems of the used filter element, complex catalyst loading process, easy agglomeration of the loaded catalyst and the like.
Disclosure of Invention
In order to solve at least one of the problems described above, the present invention provides a catalyst support, a catalyst composite filter element, and a method and apparatus for preparing the same.
An embodiment of the first aspect of the present invention provides a catalyst support composite filter element comprising:
the fiber paper is rolled by a shaft to form a plurality of laminated fiber layers; and
a catalyst support layer located between any two of the fiber layers;
wherein the catalyst support layer comprises:
a particulate main carrier laid on the surface of the fiber layer, and
and the auxiliary carrier is coated on the fiber surface inside the fiber paper and is simultaneously contained in a gap formed by paving the main carrier, and the auxiliary carrier has bonding property.
In certain embodiments, the primary carrier has a particle size of 1-400um.
In certain embodiments, the primary support material is TiO 2 、SiO 2 Or Al 2 O 3 。
In certain embodiments, the material of the auxiliary carrier is at least one of a silica sol and an alumina sol.
In certain embodiments, the catalyst support composite filter element further comprises:
and a filtering membrane layer located on an outer side surface of the outermost fiber layer.
In a second aspect, embodiments of the present invention provide a catalyst composite filter element comprising:
the fiber paper is rolled by a shaft to form a plurality of laminated fiber layers; and
a catalyst support layer located between any two of the fiber layers;
wherein the catalyst support layer comprises:
a particulate main carrier laid on the surface of the fiber layer, and
the auxiliary carrier is coated on the fiber surface inside the fiber paper and is simultaneously contained in a gap formed by paving the main carrier, and the auxiliary carrier has bonding property;
the main carrier and the auxiliary carrier are both loaded with active components of the catalyst.
In certain embodiments, the primary carrier has a particle size of 1-400um.
In certain embodiments, the primary support material is TiO 2 、SiO 2 Or Al 2 O 3 。
In certain embodiments, the material of the auxiliary carrier is at least one of a silica sol and an alumina sol.
In certain embodiments, the catalyst support composite filter element further comprises:
and a filtering membrane layer located on an outer side surface of the outermost fiber layer.
In certain embodiments, the active component comprises: v (V) 2 O 5 、MoO 3 Or WO 3 。
An embodiment of the third aspect of the present invention provides a method for preparing a catalyst carrier composite filter element, including:
Laying a mixture of auxiliary carriers and granular main carriers on a fibrous paper; wherein the auxiliary carrier has adhesive properties;
rolling the fiber paper laid with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
and curing the fiber layer and the catalyst carrier layer after the axial winding to form the catalyst carrier composite filter element.
In certain embodiments, prior to laying the mixture of secondary carrier and particulate primary carrier on the fibrous paper, the method further comprises:
an auxiliary carrier is applied to the fibrous paper to wet the fibrous paper.
In certain embodiments, the method further comprises:
a filter membrane layer is formed on the outer side surface of the outermost fiber layer.
An embodiment of a fourth aspect of the present invention provides a method for preparing a catalyst composite filter element, including:
laying a mixture of auxiliary carriers and granular main carriers on a fibrous paper; wherein the auxiliary carrier has adhesive properties;
rolling the fiber paper laid with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
Curing the fibrous layer and the catalyst support layer after spooling;
loading a catalyst active component on the catalyst support layer; wherein the catalyst support layer loaded with a catalyst active component and the fiber layer together form a catalyst composite filter element.
In certain embodiments, prior to laying the mixture of the secondary carrier and the particulate primary carrier on the fibrous paper, the method further comprises:
applying an auxiliary carrier to the fibrous paper to wet the fibrous paper;
in certain embodiments, the method further comprises:
a filter membrane layer is formed on the outer side surface of the outermost fiber layer.
An embodiment of the fifth aspect of the present invention provides a preparation apparatus for a catalytic carrier element, including:
a laying assembly for laying a mixture of the auxiliary carrier and the granular main carrier on the fiber paper; wherein the auxiliary carrier has adhesive properties;
the reel assembly reels the fiber paper paved with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
And curing the fiber layer and the catalyst carrier layer after the axial winding to form the catalyst carrier composite filter element.
In certain embodiments, the device further comprises:
a wetting assembly that applies an auxiliary carrier to the fibrous paper to wet the fibrous paper.
In certain embodiments, the device further comprises:
and a filtering membrane layer preparation module for forming a filtering membrane layer on the outer side surface of the outermost fiber layer.
In certain embodiments, the paving assembly includes a plurality of high pressure nozzles having a spray pressure in the range of 0.1-1MPa.
An embodiment of the sixth aspect of the present invention provides an apparatus for preparing a catalyst composite filter element, comprising:
a laying assembly for laying a mixture of the auxiliary carrier and the granular main carrier on the fiber paper; wherein the auxiliary carrier has adhesive properties;
the reel assembly reels the fiber paper paved with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
a curing assembly curing the rolled fiber layer and the catalyst support layer; and
A support member supporting a catalyst active component on the catalyst support layer; wherein the catalyst support layer loaded with a catalyst active component and the fiber layer together form a catalyst composite filter element.
In certain embodiments, the device further comprises:
a wetting assembly that applies an auxiliary carrier to the fibrous paper to wet the fibrous paper.
In certain embodiments, the device further comprises:
and a filtering membrane layer preparation module for forming a filtering membrane layer on the outer side surface of the outermost fiber layer.
In certain embodiments, the paving assembly includes a plurality of high pressure nozzles having a spray pressure in the range of 0.1-1MPa.
The beneficial effects of the invention are as follows:
the invention provides a catalyst carrier, a catalyst composite filter element and a preparation method and a device thereof, wherein a catalyst carrier layer is formed between fiber layers, the fiber layers are formed by fiber paper reel, an auxiliary carrier can be coated on the fiber surface inside fiber paper, and the auxiliary carrier with bonding property are matched together to form a self-support, meanwhile, the fiber paper containing the auxiliary carrier has proper porosity, can only penetrate high-temperature gas, has a filtration effect on dust, can simultaneously perform catalysis and filtration, and meanwhile, the fiber paper has good filtration performance, good high-temperature stability and low price; in addition, the auxiliary carrier can play a role in fixing the main carrier to avoid the phenomenon of transmitting migration or damage of the catalyst in the use process, and on the other hand, the auxiliary carrier can also load active components, so that the proportion of the loaded active components is improved, and the catalytic performance is further improved; furthermore, the preparation process is simple, the process cost and the material cost are low, and the catalyst has excellent filtering performance and catalytic performance.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural view of a catalyst support composite filter element in an embodiment of the present invention.
Fig. 2 shows an enlarged schematic view of portion a of fig. 1 in an embodiment of the present invention.
FIG. 3 shows an enlarged schematic view of a catalyst composite filter element in an embodiment of the invention.
Fig. 4 shows one of the flow charts of the preparation of the catalyst support composite filter element in the embodiment of the present invention.
FIG. 5 shows a second schematic flow chart of the preparation of a catalyst support composite filter element in an embodiment of the invention.
FIG. 6 shows a third schematic flow chart of the preparation of a catalyst support composite filter element in an embodiment of the invention.
FIG. 7 shows one of the flow schematic diagrams for preparing a catalyst composite filter element in an embodiment of the present invention.
FIG. 8 shows a second schematic flow chart of the preparation of a catalyst composite filter element in an embodiment of the invention.
FIG. 9 shows a third schematic flow chart for preparing a catalyst composite filter element in an embodiment of the invention.
Fig. 10 is a schematic view showing the structure of an apparatus for preparing a catalyst-supporting composite filter element in an embodiment of the present invention.
FIG. 11 shows schematic T-shaped and V-shaped structures of a catalyst support composite filter element in an embodiment of the invention.
Fig. 12 is a schematic diagram showing a specific structure of a high-pressure nozzle in the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A first aspect of the present invention provides a catalyst support composite filter element, as shown in fig. 1 and 2, comprising: a plurality of fiber layers 1, which are formed by fiber paper shaft rolls; and a catalyst support layer 2 located between any two of the fiber layers 1; wherein the catalyst support layer 2 comprises: the main carrier 21 in the form of particles is laid on the surface of the fiber layer 1, and the auxiliary carrier 22 is coated on the fiber surface inside the fiber paper and is contained in a gap formed by laying the main carrier 21, and the auxiliary carrier 22 has a bonding property.
The catalyst carrier composite filter element provided by the invention has the advantages that firstly, the fiber layer has higher porosity, the auxiliary carrier can be in a 'wet' state on the fiber layer, the auxiliary carrier can flow into the pores in the fiber layer, and the auxiliary carrier is attached to the intersections among fibers in the fiber layer and the surfaces of the fibers, so that the firm strength of the fiber layer is enhanced, a more stable structure is formed, and a self-supporting structure is further formed; the auxiliary carrier can stabilize the granular main carrier again, so that the main carrier is stable between fiber layers and is not easy to migrate and damage in the subsequent heating and reaction processes; finally, the auxiliary carrier can also be used for carrying out subsequent complex active components, so that the loading rate of the active components is greatly improved, the catalytic performance of the catalyst is improved, the preparation process of the catalyst carrier is simple, the pore size distribution and the strength of the composite filter element of the catalyst carrier can be adjusted according to the amount of the auxiliary carrier, and the adjustment process is simple.
The catalyst carrier composite filter element in the application, wherein the main carrier and the auxiliary carrier can be arranged according to the requirements, for example, in the field of denitration and VOCs (volatile organic compounds), the main carrier and the auxiliary carrier can be carriers commonly used for denitration and VOCs, as long as the main carrier is granular (powder, solid), and the auxiliary carrier has cohesive property (generally fluid and emulsion).
As an example, the main carrier may be carbon nanotubes, tiO 2 Powders, molecular sieves, and the like, as well as mixtures of one or more of the foregoing. The auxiliary carrier can be one or more of silica sol and aluminum sol.
In this application, the porosity of the fibre paper after "wetting" and solidification is more suitable, and pressure drop is little on the one hand, and on the other hand can prevent dust particle to see through the fibre paper, has filterable effect.
Silica sol and alumina sol are in emulsion form, have fluid properties, and are therefore able to sink into the interstices of the primary support and into the interstices of the fibrous layer by flowing. The auxiliary carrier has adhesive property, so that the main carrier and the fiber layer are firmly fixed.
Of course, the present application is not exhaustive of the primary and secondary carriers, but it is understood that merely "modifications" to the application in terms of material selection should be within the scope of the present application.
As shown in fig. 2, since the main carriers are granular, the auxiliary carriers can be trapped in the gaps between the main carriers by pressurizing or sucking, etc., and the main carriers can also be trapped in the gaps in the fiber layer.
It is to be understood that fig. 2 is only a schematic view, fig. 2 only showing the auxiliary carrier accommodated in the voids of the main carrier, which is not shown, the auxiliary carrier being coated on the surface of the fibers within the fiber layer 1.
In some embodiments, the primary support may be a conventional catalyst support particle, and the particle size may be 1-400um, which is not limited in this application, and the particle size of the primary support may be greater than or less than the gap size of the fiber layer, and when the particle size of the primary support is less than the gap size of the fiber layer, a small portion of the primary support may sink into the surface of the fiber layer.
In a preferred embodiment, the primary support may be micro-nano scale particles, e.g. the carbon nanotubes are nano-sized, it is due to the binding properties of the secondary support that the secondary support is capable of immobilizing the nano-sized particles and that the secondary support coats the fiber surface in the fiber layer, blocking leakage of the primary support.
Further, in some preferred embodiments, the catalyst carrier composite filter element further includes a filter membrane layer 3 on an outer side surface of the outermost fiber layer, the filter membrane layer being capable of filtering dust, which may be used for dust particle filtration, impurity filtration, and the like.
The filter membrane layer can further filter dust, avoids the condition that the fiber paper is not thoroughly filtered.
In some embodiments, the fibrous paper may be ceramic fiber paper, which is classified into soft, semi-hard and hard, and is composed of ceramic fibers and an organic binder, and has a grammage of 150-350kg/m 3 The thickness is 0.5-5 mm. Ceramic fibers are classified into aluminum silicate fibers, aluminum oxide fibers and the like, and the diameters of the fibers are distributed between 1 and 10 mu m.
In this example, the ceramic fiber paper used had a porosity of over 95% by itself, and although the porosity after wetting and curing was slightly reduced, the pressure drop was significantly reduced compared to the current catalyst elements.
A second aspect of the present invention provides a catalyst composite filter element, as shown in fig. 3, comprising: a plurality of fiber layers 1, wherein the fiber layers 1 are formed by fiber paper shaft rolls; and a catalyst support layer 2 located between any two of the fiber layers 1; wherein the catalyst support layer 2 comprises: a granular main carrier 21 laid on the surface of the fiber layer 1, and an auxiliary carrier 22 accommodated in a gap formed by laying the main carrier 21, the auxiliary carrier 22 having adhesive property; the main support 21 and the auxiliary support 22 are both supported with the active component 23 of the catalyst.
The catalyst composite filter element provided by the invention has the advantages that firstly, the fiber layer has higher porosity, the auxiliary carrier can be in a 'wet' state on the fiber layer, the auxiliary carrier can flow into the gaps in the fiber layer, and the auxiliary carrier is attached to the intersections between fibers in the fiber layer and the surfaces of the fibers, so that the firm strength of the fiber layer is enhanced, a more stable structure is formed, and a self-supporting structure is formed; the auxiliary carrier can stabilize the granular main carrier again, so that the main carrier is stable between fiber layers and is not easy to migrate and damage in the subsequent heating and reaction processes; finally, the auxiliary carrier can also be used for carrying complex active components in the follow-up process, so that the loading rate of the active components is greatly improved, the catalytic performance of the catalyst is improved, and further, the preparation process is simple, the process cost and the material cost are low, the excellent filtering performance and the catalytic performance are achieved, the pore size distribution and the strength of the catalyst carrier composite filtering element can be adjusted according to the amount of the auxiliary carrier, and the adjustment process is simple.
The catalyst composite filter element in the application, wherein the main carrier and the auxiliary carrier can be arranged according to the requirement, for example, in the field of denitration of the VOCs, the main carrier and the auxiliary carrier can be carriers commonly used for denitration and denitration of the VOCs, and only the main carrier is granular (powder and solid), and the auxiliary carrier has cohesive property (generally fluid and emulsion).
As an example, the main carrier may be carbon nanotubes, tiO 2 Powders, molecular sieves, and the like, as well as mixtures of one or more of the foregoing. The auxiliary carrier can be one or more of silica sol and aluminum sol.
Silica sol and alumina sol are in emulsion form, have fluid properties, and are therefore able to sink into the interstices of the primary support and into the interstices of the fibrous layer by flowing. The auxiliary carrier has adhesive property, so that the main carrier and the fiber layer are firmly fixed.
Of course, the present application is not exhaustive of the primary and secondary carriers, but it is understood that merely "modifications" to the application in terms of material selection should be within the scope of the present application.
As shown in fig. 3, since the main carriers are granular, the auxiliary carriers can be trapped in the gaps between the main carriers by pressurizing or sucking, etc., and the main carriers can also be trapped in the gaps in the fiber layer.
As can be seen from fig. 3, the supported catalyst active component may be supported on the supporting site of the surface of the main support or may be supported on an auxiliary support, not shown, and the catalyst active component may be supported on the auxiliary support coated on the surface of the fibers in the fiber layer.
In some embodiments, taking a denitration catalyst as an example, the active component includes: v (V) 2 O 5 、WO 3 、MoO 3 Etc., the active component may be selected according to the specific circumstances, the present application merely exemplifies two examples, and it should be understood that the active components which are currently catalytically active are of a wide variety and are not exhaustive herein.
Fig. 3 shows a large scale of supported catalyst active components for convenience, and the actual catalyst active components are smaller, usually in micrometer scale or even nanometer scale, so that the specific surface area of the active components is large and the catalytic activity is high. One primary carrier particle may carry hundreds to thousands of active components, as is also shown by way of illustration only in fig. 3, with the secondary carrier also being present in the fibrous layer, and not shown, with the secondary carrier also being present in the fibrous layer with hundreds to thousands of active components.
In some embodiments, the primary carrier may be a conventional catalyst carrier particle, and the particle size may be 1-400um, which is not limited in this application, and the particle size of the primary carrier may be larger than the gap size of the fiber layer, or may be smaller than the gap size of the fiber layer, because the secondary carrier can fill the gap of the fiber layer, and further block the leakage of the primary carrier through the gap of the fiber layer.
In a preferred embodiment, the primary support may be micro-nano-sized particles, e.g., carbon nanotubes and molecular sieves are nano-sized, the secondary support is capable of immobilizing the nano-sized particles due to the binding properties of the secondary support, and the secondary support coats the fiber surface in the fiber layer, blocking leakage of the primary support.
In some embodiments, the fibrous paper may be ceramic fiber paper, which is classified into soft, semi-hard and hard, and is composed of ceramic fibers and an organic binder, and has a grammage of 150-350kg/m 3 The thickness is 0.5-5 mm. Ceramic fiberThe fiber is divided into aluminum silicate fiber, aluminum oxide fiber and the like, and the fiber diameter is distributed at 1-10um.
In this example, the ceramic fiber paper itself has a porosity of over 95%, so that the component produced has a low pressure drop.
Further, in some preferred embodiments, the catalyst composite filter element further comprises a filter membrane layer on an outer side surface of the outermost fiber layer, the filter membrane layer being capable of filtering dust, and may be used for dust particle filtration, impurity filtration, and the like. The filter membrane layer can further filter dust, avoids the condition that the fiber paper is not thoroughly filtered.
The third aspect of the present invention further provides a method for preparing a catalyst carrier composite filter element, as shown in fig. 4, specifically comprising:
s11, paving a mixture of an auxiliary carrier and a granular main carrier on fiber paper; wherein the auxiliary carrier has adhesive properties;
s12, rolling the fiber paper laid with the main carrier and the auxiliary carrier along the length direction so that the fiber paper forms a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
and S13, curing the fiber layer and the catalyst carrier layer after the winding to form the catalyst carrier composite filter element.
According to the preparation method of the catalyst carrier composite filter element, the fiber paper shaft is rolled, stable combination of the main carrier can be realized under the action of the bonding property of the auxiliary carrier, the preparation process is greatly simplified, the preparation period is shortened, the preparation cost is reduced, meanwhile, automatic production can be realized, the catalytic performance and the firmness can be further regulated by regulating the amounts of the main carrier and the auxiliary carrier, the pore size distribution and the strength of the catalyst carrier composite filter element can be regulated according to the amount of the auxiliary carrier, and the regulation process is simple.
In step S11, the auxiliary carrier is first mixed with the granular main carrier, and the mixed mixture is laid on the fiber paper to achieve temporary stabilization because the auxiliary carrier is fluid and has adhesive property.
After the step S12 is rolled, the fiber paper can be formed into a scroll shape, and the main carrier and the auxiliary carrier are positioned between every two fiber layers to jointly form a catalyst carrier layer.
In step S13, the catalyst carrier composite filter element is bound by the wire mesh first, and then cured according to the material of the auxiliary carrier, for example, the catalyst carrier composite filter element may be cured by standing at normal temperature for a period of time, or may be cured by heating, or may be cured by adding a curing agent.
Further, in some preferred embodiments, the auxiliary carrier may be applied to the fibrous paper first, and the auxiliary carrier coats the fiber surface of the fibrous paper due to the voids in the fibrous paper, thereby "wetting" the fibrous paper and reinforcing the fibrous paper. I.e. in this embodiment, before performing the above steps, as shown in fig. 5, the method further comprises:
And S10, applying an auxiliary carrier on the fiber paper to moisten the fiber paper.
The fiber paper after wetting has better stability, and can realize self-support by combining the reel structure. Further, the auxiliary carrier is sunk into the fiber paper at the crossing point between the fibers, thereby further improving the firm strength of the fiber paper.
Further, in some preferred embodiments, as shown in fig. 6, the method further includes:
and S14, forming a filtering membrane layer on the outer side surface of the outermost fiber layer.
The filtering membrane layer can filter dust, and can be used for dust particle filtration, impurity filtration and the like. The filter membrane layer can further filter dust, avoids the condition that the fiber paper is not thoroughly filtered.
Furthermore, the materials and the existence forms of the primary carrier and the secondary carrier are not described herein for the same reasons as those of the embodiments in the first aspect of the present application, but it is known that only "improvement" in material selection of the present application shall fall within the scope of the present application.
Further, a fourth aspect of the present invention provides a method for preparing a catalyst composite filter element, as shown in fig. 7, specifically including:
s21, paving a mixture of an auxiliary carrier and a granular main carrier on fiber paper; wherein the auxiliary carrier has adhesive properties;
S22, rolling the fiber paper laid with the main carrier and the auxiliary carrier along the length direction so that the fiber paper forms a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
s23, curing the fiber layer and the catalyst carrier layer after the reel;
s24, loading a catalyst active component on the catalyst carrier layer; wherein the catalyst support layer loaded with a catalyst active component and the fiber layer together form a catalyst composite filter element.
According to the preparation method of the catalyst composite filter element provided by the fourth aspect of the invention, the fiber paper is rolled, stable combination of the main carrier can be realized under the action of the bonding property of the auxiliary carrier, the preparation process is greatly simplified, the preparation period is shortened, the preparation cost is reduced, meanwhile, automatic production can be realized, further, the catalyst performance and the firmness can be further regulated by regulating the quantity of the main carrier and the auxiliary carrier, then the preparation of the catalyst composite filter element is realized by further loading the active component, and the auxiliary carrier also has the loading effect, so that the loading rate of the active component is improved, the catalytic performance is further improved, and meanwhile, the pore size distribution and the strength of the catalyst carrier composite filter element can be regulated according to the quantity of the auxiliary carrier, and the regulation process is simple.
In step S21, the auxiliary carrier is first mixed with the granular main carrier, and the mixed mixture is laid on the fiber paper to achieve temporary stabilization because the auxiliary carrier is fluid and has adhesive property.
After the step S22 is rolled, the fiber paper can be formed into a scroll shape, and the main carrier and the auxiliary carrier are positioned between every two fiber layers to jointly form a catalyst carrier layer.
In step S23, the catalyst carrier composite filter element is bound by the wire mesh first, and then cured according to the material of the auxiliary carrier, for example, the catalyst carrier composite filter element may be cured by standing at normal temperature for a period of time, or may be cured by heating, or may be cured by adding a curing agent.
In step S24, the active ingredient may be loaded by a method known in the chemical preparation field such as an impregnation method, a liquid phase precipitation method, etc., which is not limited in the present invention.
Further, in some preferred embodiments, the auxiliary carrier may be applied to the fibrous paper first, and the auxiliary carrier coats the fiber surface of the fibrous paper due to voids in the fibrous paper, thereby "wetting" the fibrous paper, reinforcing the fibrous paper on the one hand, and blocking the passage of the primary carrier on the other hand. I.e. in this embodiment, before performing the above steps, as shown in fig. 8, the method further comprises:
And S20, applying an auxiliary carrier on the fiber paper to moisten the fiber paper.
The fiber paper after wetting has better stability, and can realize self-support by combining the reel structure. Further, the auxiliary carrier is sunk into the fiber paper at the crossing point between the fibers, thereby further improving the firm strength of the fiber paper.
Further, in some preferred embodiments, as shown in fig. 9, the method further includes:
and S25, forming a filtering membrane layer on the outer side surface of the outermost fiber layer.
The filtering membrane layer can filter dust, and can be used for dust particle filtration, impurity filtration and the like.
Furthermore, the materials and the existence forms of the primary carrier and the secondary carrier are not described herein for the same reasons as those of the embodiments in the first aspect of the present application, but it is known that only "improvement" in material selection of the present application shall fall within the scope of the present application.
Based on the detailed description of the above preparation method embodiment, a fifth aspect of the present invention provides a preparation apparatus of a catalyst carrier composite filter element, as shown in fig. 10, comprising:
a laying assembly 100 for laying a mixture of auxiliary carriers and granular primary carriers on a fibrous paper 200; wherein the auxiliary carrier has adhesive properties;
A reel assembly 400 for reel the fiber paper 200 laid with the main carrier and the auxiliary carrier in a length direction so that the fiber paper 200 forms a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
and curing the fiber layer and the catalyst carrier layer after the axial winding to form the catalyst carrier composite filter element.
According to the preparation device of the catalyst carrier composite filter element, provided by the fifth aspect of the invention, after the fiber paper is rolled by the laying assembly, the rolling assembly and the curing assembly of the device, the stable combination of the main carrier can be realized under the action of the bonding property of the auxiliary carrier, so that the preparation process is greatly simplified, the preparation period is shortened, the preparation cost is reduced, meanwhile, the automatic production can be realized, and further the catalytic performance and the firmness can be further regulated by regulating the amounts of the main carrier and the auxiliary carrier.
In this application, paving assembly 100 may be a number of high pressure nozzles, i.e., a mixture of primary and secondary carriers is ejected through nozzles on a high pressure spray gun.
In some embodiments, the high pressure nozzles are several, such as 3-12.
In some embodiments, the pore size is 0.5mm-5mm, and the pore size may be determined based on the size of the primary support.
In some embodiments, the spray amount is0.5-5kg/m 2 The spraying pressure is 0.1-1MPa.
The relative proportion of the main carrier and the auxiliary carrier can be adjusted arbitrarily according to the requirement, and the mixture of the main carrier and the auxiliary carrier is formed after the mixture is stirred uniformly.
The reel assembly may be a rotating shaft, etc., and the surface of the rotating shaft fixes one end of the fiber paper 200 along the length direction, so that the fiber paper 200 rotates by the rotation of the rotating shaft.
The curing component can be arranged according to the requirement, and for certain materials, such as silica sol, the curing needs to be heated and cured, so the curing component can be a conventional heating device, such as a heating rod, an electric element with a heating function, such as a resistance wire, and the like, and for certain materials, aging is required to realize the curing, namely, the curing component can be a containing tank.
During curing, the catalyst carrier composite filter element needs to be bound by adopting a silk screen, so that deformation generated during curing is prevented, and deformation of a final cured product is caused.
In some embodiments, the entire component may be conveniently released after curing by application of a release agent prior to curing.
Preferably, the curing assembly may be a microwave heating device, and the microwave heating may prevent the adhesive from migrating to the surface of the component during the heating process, thereby reducing the strength of the composite component.
Further, in a preferred embodiment, as shown in fig. 10, the apparatus further comprises:
a wetting assembly 300 that applies an auxiliary carrier to the fibrous paper 200 to wet the fibrous paper 200.
The auxiliary carrier may be applied to the fiber paper 200, for example, by pressing, spraying, suction, or the like. In one embodiment, the wetting module is a suction device that applies vacuum to substantially all of the fiber-to-fiber intersections in the fibrous paper 200 matrix with an auxiliary carrier applied in an amount of 50% -1000% wt (wet state) relative to the ceramic fibrous paper 200.
Further, in a preferred embodiment, the apparatus further comprises:
the filter membrane layer preparation assembly forms a filter membrane layer on the outer side surface of the outermost fiber layer, and the filter membrane layer can filter dust and can be used for dust particle filtration, impurity filtration and the like.
Furthermore, the filtering membrane layer preparation component can also be a high-pressure gas spray gun, and the filtering membrane layer is formed through a spraying process.
The material of the filtration membrane layer may be a material forming an auxiliary support, for example, one or more of silica sol and alumina sol, or a mixture of one or more of silica sol and alumina sol and short fine fibers or ceramic particles.
Of course, the filter membrane layer may also be a mixture of short fine fibers or ceramic particles, and in some embodiments, a filter membrane layer for dust filtration, provided that the pore size formed is smaller than the particle size of the dust.
Based on the same technical idea as the fourth aspect of the present invention, the sixth aspect of the present invention also provides a preparation device of a catalyst composite filter element, including:
a laying assembly for laying a mixture of the auxiliary carrier and the granular main carrier on the fiber paper; wherein the auxiliary carrier has adhesive properties;
the reel assembly reels the fiber paper paved with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
a curing assembly curing the rolled fiber layer and the catalyst support layer; and
A support member supporting a catalyst active component on the catalyst support layer; wherein the catalyst support layer loaded with a catalyst active component and the fiber layer together form a catalyst composite filter element.
According to the preparation device of the catalyst composite filter element, provided by the sixth aspect of the invention, after the fiber paper is rolled by the laying assembly, the rolling assembly, the curing assembly and the loading assembly of the device, the stable combination of the main carrier can be realized under the action of the bonding property of the auxiliary carrier, so that the preparation process is greatly simplified, the preparation period is shortened, the preparation cost is reduced, meanwhile, the automatic production can be realized, and further the catalytic performance and the firmness can be further regulated by regulating the amounts of the main carrier and the auxiliary carrier.
In this application, the laying assembly may be a number of high pressure nozzles, i.e. a mixture of primary and secondary carriers is ejected through the nozzles on the high pressure spray gun.
In some embodiments, the high pressure nozzles are several, such as 3-12.
In some embodiments, the pore size is 0.5mm-5mm, and the pore size may be determined based on the size of the primary support.
In some embodiments, the spray amount is 0.5-5kg/m 2 The spraying pressure is 0.1-1MPa.
The relative proportion of the main carrier and the auxiliary carrier can be adjusted arbitrarily according to the requirement, and the mixture of the main carrier and the auxiliary carrier is formed after the mixture is stirred uniformly.
The reel assembly can be a rotating shaft and the like, and the surface of the rotating shaft is used for fixing one end of the fiber paper along the length direction, so that the fiber paper is rotated by the rotation of the rotating shaft.
The curing component can be arranged according to the requirement, and for certain materials, such as silica sol, the curing needs to be heated and cured, so the curing component can be a conventional heating device, such as a heating rod, an electric element with a heating function, such as a resistance wire, and the like, and for certain materials, aging is required to realize the curing, namely, the curing component can be a containing tank.
During curing, the catalyst carrier composite filter element needs to be bound by adopting a silk screen, so that deformation generated during curing is prevented, and deformation of a final cured product is caused.
Preferably, the curing assembly may be a microwave heating device, and the microwave heating may prevent the adhesive from migrating to the surface of the component during the heating process, thereby reducing the strength of the composite component.
In some embodiments, the entire component may be conveniently released after curing by application of a release agent prior to curing.
The support member may be a conventional reactor, such as a microreactor, in which the catalyst active components are supported by chemical preparation, such as precipitation, liquid phase reduction, impregnation, sol-gel, etc., to which the present invention is not limited, and the details of the above-mentioned methods are well known to those skilled in the art.
Further, in a preferred embodiment, the apparatus further comprises:
a wetting assembly that applies an auxiliary carrier to the fibrous paper to wet the fibrous paper.
The auxiliary carrier may be applied to the fibre paper, for example by means of pressing, spraying, suction or the like. In one embodiment, the wetting module is a suction device and the vacuum suction is applied to substantially attach an auxiliary carrier to the fiber paper substrate at the fiber-to-fiber intersections, the auxiliary carrier being applied in an amount of 50% to 1000% by weight (wet state) relative to the ceramic fiber paper.
Further, in a preferred embodiment, the apparatus further comprises:
the filter membrane layer preparation assembly forms a filter membrane layer on the outer side surface of the outermost fiber layer, and the filter membrane layer can filter dust and can be used for dust particle filtration, impurity filtration and the like.
Furthermore, the filtering membrane layer preparation component can also be a high-pressure gas spray gun, and the filtering membrane layer is formed through a spraying process.
The material of the filtration membrane layer may be a material forming an auxiliary support, for example, one or more of silica sol and alumina sol, or a mixture of one or more of silica sol and alumina sol and short fine fibers or ceramic particles.
Of course, the filter membrane layer may also be a mixture of short fine fibers or ceramic particles, and in some embodiments, a filter membrane layer for dust filtration, provided that the pore size formed is smaller than the particle size of the dust.
A specific scenario is described below.
Preparing the catalytic composite filter element for dust removal and catalytic denitration.
The catalyst in the catalytic composite filter element is V 2 O 5 -WO 3 /TiO 2 Denitration catalyst.
As shown in fig. 11, the catalytic composite filter element is of T-type or V-type, and its cross-sectional view is shown in fig. 1, and includes a fiber layer 1, a catalyst layer (formed by supporting an active component on a catalyst support layer), and a filtration membrane layer 3.
Wherein, one or more of silica sol, alumina sol and the like are adopted as auxiliary carriers and materials for forming the filtering membrane layer. The adhesive can be mixed with deionized water according to the requirement, and the adhesives are dehydrated and solidified, namely, a hard structure is formed after drying and dehydration, and the temperature resistance can reach more than 1000 ℃.
The main carrier is TiO 2 The auxiliary carrier is one or more of silica sol and aluminum sol, and TiO 2 The crystal form of (a) is anatase type, V 2 O 5 、MoO 3 Or WO 3 As an active component, supported on TiO 2 、SiO 2 ，Al 2 O 3 (i.e., primary and secondary carrier) surfaces, generally V 2 O 5 The loading is 0.5-15 wt%, WO 3 The loading is 3-10 wt% (relative to the TiO carrier 2 ) The particle size distribution of the main carrier loaded with active components is 0.05-0.5mm, and V is determined according to different preparation methods 2 O 5 -WO 3 /TiO 2 The specific surface area of the catalyst is generally from 70 to 500m 2 In the range of/g.
When the catalytic composite filter element in the present scenario is prepared, firstly, the ceramic fiber paper is wetted with an auxiliary carrier solution by a vacuum suction mode, so that auxiliary carriers are attached to the intersections of fibers and the surfaces of the fibers in the ceramic fiber paper matrix, the application amount of the auxiliary carriers is 50% -1000% wt (in a wet state) relative to the ceramic fiber paper, and the application amount of the auxiliary carriers can be adjusted by changing parameters such as suction speed in the vacuum suction process.
Then the mixture of the main carrier and the auxiliary carrier is evenly sprayed on the surface of the wet ceramic fiber paper by a high-pressure spray gun, wherein the spraying amount is 0.5-5kg/m 2 The spraying pressure is 0.1-1MPa, and the diameter of the nozzle of the high-pressure spray gun is 0.5-5mm. The main carrier and the auxiliary carrier can be mixed and stirred uniformly according to the requirement, and then the mixture is sprayed, so that the strength of the catalyst carrier layer can be increased.
The wetted ceramic fiber paper is spirally wound, and generally, the spraying of the mixture of the main carrier and the auxiliary carrier is started after the ceramic fiber paper is wound on a die for one circle, so that the main carrier and the auxiliary carrier do not exist on the inner surface of the fiber layer of the innermost layer, and the problem that the main carrier and the auxiliary carrier are easy to fall off after being solidified due to the fact that the fiber layer of the innermost layer is exposed outside is avoided. Winding to 10-20mm thickness, wrapping with silk screen, fixing the whole structure, drying by microwave heating for 10-30min, and demolding. The microwave heating mode can prevent the auxiliary carrier from migrating to the surface of the element in the heating process to cause the strength of the composite element to be reduced. Before winding, a layer of release agent is coated on the surface of the die, and the whole structure is taken off from the die after preparation is finished.
As shown in the schematic structure of the high pressure spray gun 500 of fig. 12, the auxiliary carrier solution and the high pressure gas are introduced through the inlet 501 and sprayed out through the nozzle 502.
The high pressure spray gun shown in fig. 12 can also be used for the preparation of the filtration membrane layer.
Firstly, preparing a solution of a filtering membrane layer, wherein the raw materials are one or more of silica sol and alumina sol (namely the same material as an auxiliary carrier), introducing the solution and high-pressure gas into a spraying device, wherein the high-pressure gas pressure is in the range of 0.1-1MPa, and 3-12 nozzles with the aperture of 0.5-3mm are arranged on the spraying device, and atomizing the silica sol and the like flowing through the nozzles into small liquid drops through the high-pressure gas.
And sleeving a spraying device on the prepared catalyst carrier composite filter element, wherein the spraying opening is 3-50mm away from the outer surface of the catalyst carrier composite filter element. The spraying device is fixed on the guide rail from top to bottom uniformlySpraying silica sol and other liquid drops on the outer surface of the catalyst carrier composite filter element in the spraying amount of 0.5-20kg/m 2 。
After the spraying is finished, the paint is dried for 2 to 5 hours at the temperature of 80 to 150 ℃.
In addition, the spray material (material forming the filtration membrane layer) may be a mixture of one or more of silica sol and alumina sol with short fine fibers or ceramic particles, as required. Furthermore, the pore size distribution of the filtering membrane layer can be changed by adjusting the moving speed of the spraying device and the spraying times.
And then carrying out high-temperature heat treatment (curing) on the prepared catalyst carrier composite filter element, heating to 200-600 ℃ at the heating rate of 10 ℃/min, then preserving heat for 1-3h, and taking out after recovering to room temperature.
Finally, loading V on the solidified catalyst carrier composite filter element by adopting an impregnation method 2 O 5 -WO 3 A catalyst composite filter element is obtained which also has a filtration function.
The prepared catalytic composite filter element has the temperature resistance reaching more than 600 ℃ and the bending strength of 1.35MPa. At ambient temperature and a filtration gas velocity of 1m/min, an initial pressure drop of 156Pa, and dust in the outlet gas of 2mg/m 3 The following are set forth; the denitration conversion rate is more than 95% under the temperature range of 300-200 ℃ and the gas velocity of 1 m/min.
The above scenario only shows a denitration catalyst, and obviously, based on the main concept of the present application, the catalyst can be replaced with a catalyst for removing VOCs, tar, and the like as needed.
Through the detailed description of the scene, it can be known that the denitration and dedusting integrated catalyst composite filter element provided by the scene can effectively integrate two independent processes of dedusting and catalytic denitration, and has the advantages of simplifying the flue gas purification process, reducing the energy consumption, reducing the investment and the operation cost and smaller occupied area compared with the prior art; meanwhile, the preparation process is greatly simplified, the preparation period is shortened, the component pressure drop can be reduced, the energy consumption is reduced, partial catalyst is prevented from being damaged and not acting, the catalysis effect of all the catalyst loaded on the filter element is fully exerted, and further, the porosity of the ceramic fiber paper exceeds 95%, so that the prepared component pressure drop is lower.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," 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 embodiments of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. The foregoing is merely an example of an embodiment of the present disclosure and is not intended to limit the embodiment of the present disclosure. Various modifications and variations of the illustrative embodiments will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the embodiments of the present specification, should be included in the scope of the claims of the embodiments of the present specification.
Claims (15)
1. A catalyst support composite filter element comprising:
the fiber paper is rolled by a shaft to form a plurality of laminated fiber layers; and
a catalyst support layer located between any two of the fiber layers;
wherein the catalyst support layer comprises:
a particulate main carrier laid on the surface of the fiber layer, and
the auxiliary carrier is coated on the fiber surface inside the fiber paper and is contained in a gap formed by paving the main carrier, and the auxiliary carrier has bonding property; the auxiliary carriers are sunk into gaps among the main carriers in a pressurizing or sucking mode, and meanwhile, the main carriers are sunk into the gaps in the fiber layer; the auxiliary carrier improves the loading rate of active components and improves the catalytic performance of the catalyst; the auxiliary carrier is made of at least one of silica sol and aluminum sol;
the catalyst support composite filter element further comprises:
and a filtering membrane layer located on an outer side surface of the outermost fiber layer.
2. The catalyst support composite filter element of claim 1, wherein the primary support has a particle size of 1-400um.
3. The catalyst support composite filter element of claim 1, wherein the primary support material is TiO 2 、SiO 2 Or Al 2 O 3 。
4. A catalyst composite filter element, comprising:
the fiber paper is rolled by a shaft to form a plurality of laminated fiber layers; and
a catalyst support layer located between any two of the fiber layers;
wherein the catalyst support layer comprises:
a particulate main carrier laid on the surface of the fiber layer, and
the auxiliary carrier is coated on the fiber surface inside the fiber paper and is contained in a gap formed by paving the main carrier, and the auxiliary carrier has bonding property; the auxiliary carriers are sunk into gaps among the main carriers in a pressurizing or sucking mode, and meanwhile, the main carriers are sunk into the gaps in the fiber layer; the auxiliary carrier improves the loading rate of active components and improves the catalytic performance of the catalyst; the auxiliary carrier is made of at least one of silica sol and aluminum sol;
the main carrier and the auxiliary carrier are both loaded with active components of the catalyst;
the catalyst composite filter element further comprises:
And a filtering membrane layer located on an outer side surface of the outermost fiber layer.
5. The catalyst composite filter element of claim 4, wherein the primary support has a particle size of 1-400um.
6. The catalyst composite filter element of claim 4, wherein the primary support material is TiO 2 、SiO 2 Or Al 2 O 3 。
7. The catalyst composite filter element of claim 6, wherein the active component comprises: v (V) 2 O 5 、M O O 3 Or WO 3 。
8. A method of making a catalyst support composite filter element based on the catalyst support composite filter element of claim 1, comprising:
laying a mixture of auxiliary carriers and granular main carriers on a fibrous paper; wherein the auxiliary carrier has adhesive properties; the auxiliary carriers are sunk into gaps among the main carriers in a pressurizing or sucking mode, and meanwhile, the main carriers are sunk into the gaps in the fiber layer; the auxiliary carrier improves the loading rate of active components and improves the catalytic performance of the catalyst;
rolling the fiber paper laid with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
Solidifying the fiber layer and the catalyst carrier layer after the axial winding to form the catalyst carrier composite filter element; during solidification, the catalyst carrier composite filter element is bound by adopting a silk screen; before curing, the whole element is conveniently demolded after curing by smearing a release agent;
the method further comprises the steps of:
a filter membrane layer is formed on the outer side surface of the outermost fiber layer.
9. The method of making according to claim 8, wherein prior to laying the mixture of secondary carrier and particulate primary carrier on the fibrous paper, the method further comprises:
an auxiliary carrier is applied to the fibrous paper to wet the fibrous paper.
10. A method of making a catalyst composite filter element based on the catalyst composite filter element of claim 4, comprising:
laying a mixture of auxiliary carriers and granular main carriers on a fibrous paper; wherein the auxiliary carrier has adhesive properties; the auxiliary carriers are sunk into gaps among the main carriers in a pressurizing or sucking mode, and meanwhile, the main carriers are sunk into the gaps in the fiber layer; the auxiliary carrier improves the loading rate of active components and improves the catalytic performance of the catalyst;
Rolling the fiber paper laid with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
curing the fibrous layer and the catalyst support layer after spooling; during solidification, the catalyst carrier composite filter element is bound by adopting a silk screen; before curing, the whole element is conveniently demolded after curing by smearing a release agent;
loading a catalyst active component on the catalyst support layer; wherein the catalyst support layer and the fiber layer loaded with a catalyst active component together form a catalyst composite filter element;
the method further comprises the steps of:
a filter membrane layer is formed on the outer side surface of the outermost fiber layer.
11. The method of making according to claim 10, wherein prior to laying the mixture of the secondary carrier and the particulate primary carrier on the fibrous paper, the method further comprises:
an auxiliary carrier is applied to the fibrous paper to wet the fibrous paper.
12. A production apparatus for a catalyst carrier-composite filter element based on the catalyst carrier-composite filter element according to claim 1, comprising:
A laying assembly for laying a mixture of the auxiliary carrier and the granular main carrier on the fiber paper; wherein the auxiliary carrier has adhesive properties; the auxiliary carriers are sunk into gaps among the main carriers in a pressurizing or sucking mode, and meanwhile, the main carriers are sunk into the gaps in the fiber layer; the auxiliary carrier improves the loading rate of active components and improves the catalytic performance of the catalyst;
the reel assembly reels the fiber paper paved with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
a curing assembly for curing the rolled fiber layer and the catalyst carrier layer to form the catalyst carrier composite filter element; during solidification, the catalyst carrier composite filter element is bound by adopting a silk screen; before curing, the whole element is conveniently demolded after curing by smearing a release agent;
the device further comprises:
and a filtering membrane layer preparation module for forming a filtering membrane layer on the outer side surface of the outermost fiber layer.
13. The apparatus for preparing as set forth in claim 12, further comprising:
a wetting assembly that applies an auxiliary carrier to the fibrous paper to wet the fibrous paper.
14. A catalyst composite filter element manufacturing apparatus based on the catalyst composite filter element according to claim 4, comprising:
a laying assembly for laying a mixture of the auxiliary carrier and the granular main carrier on the fiber paper; wherein the auxiliary carrier has adhesive properties; the auxiliary carriers are sunk into gaps among the main carriers in a pressurizing or sucking mode, and meanwhile, the main carriers are sunk into the gaps in the fiber layer; the auxiliary carrier improves the loading rate of active components and improves the catalytic performance of the catalyst;
the reel assembly reels the fiber paper paved with the main carrier and the auxiliary carrier along the length direction so as to form a plurality of laminated fiber layers; wherein, the main carrier and the auxiliary carrier positioned between any two fiber layers jointly form a catalyst carrier layer;
a curing assembly curing the rolled fiber layer and the catalyst support layer; during solidification, the catalyst carrier composite filter element is bound by adopting a silk screen; before curing, the whole element is conveniently demolded after curing by smearing a release agent; and
A support member supporting a catalyst active component on the catalyst support layer; wherein the catalyst support layer and the fiber layer loaded with a catalyst active component together form a catalyst composite filter element;
the device further comprises:
and a filtering membrane layer preparation module for forming a filtering membrane layer on the outer side surface of the outermost fiber layer.
15. The apparatus for preparing as set forth in claim 14, further comprising:
a wetting assembly that applies an auxiliary carrier to the fibrous paper to wet the fibrous paper.
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| CN110694353B (en) * | 2019-10-17 | 2020-11-27 | 中国科学院过程工程研究所 | Ceramic fiber catalytic filter element and integrated preparation method thereof |
| CN113198456B (en) * | 2021-04-28 | 2022-07-29 | 中国石油大学(北京) | Catalytic filtration composite element and preparation method and application thereof |
| CN113318518B (en) * | 2021-05-26 | 2022-07-12 | 中国石油大学(北京) | Filter element, preparation method and application thereof |
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