A process for preparing a ceramic filter plate and the use of a ceramic filter plate

Abstract

The application provides a ceramic filter plate preparation process and application of the ceramic filter plate. The ceramic filter plate preparation process comprises: a ceramic filter tube preparation step S1: cellulose powder and glycerol liquid are put into a reaction kettle, stirred uniformly, then silicon nitride powder and diatomite powder are added and mixed to form a ceramic material; S2: an extrusion process is used to extrude the ceramic material to form a wave structure pipe body, and then drying, sintering and cooling processes are performed; a film coating process C1: diatomite and a dispersing agent are mixed, dispersed through ultrasonic treatment, then nano silicon dioxide and water glass are added, and the mixture is stirred to form a coating; C2: the coating is coated on the surface of the ceramic filter tube, calcined after baking to form a film layer, so that the film coating compactness and thermal shock resistance are improved; and a ceramic filter plate preparation step: after a tail end head is bonded to the tail end of the ceramic filter tube, the ceramic filter tube is inserted into a positioning hole in a head sheath for bonding, and after solidification, a seal is loaded in the head sheath.

Description

Technical Field

[0001] This invention relates to the field of refractory material manufacturing and processing technology, specifically to a ceramic filter plate preparation process and the application of ceramic filter plates. Background Technology

[0002] In the fields of dust removal, separation, and purification, filter elements are the core components for achieving dust control and media separation, playing a vital role in environmental purification and improving industrial production efficiency. Currently, the filter elements widely used in the industry are mainly polymer filter plates and polymer filter cartridges, both of which are manufactured using a sintering process. Their raw materials are generally organic polymer materials, including three common types: ultra-high molecular weight polyethylene, polyphenylene ether, and polytetrafluoroethylene.

[0003] However, in practical applications, these polymer filter elements have the following drawbacks:

[0004] On the one hand, while using ultra-high molecular weight polyethylene as a raw material can effectively control raw material costs and has certain economic advantages, the material itself has poor high-temperature resistance and cannot be adapted to filtration scenarios with high-temperature environments, greatly limiting its application range. On the other hand, while polyphenylene ether or polytetrafluoroethylene can be used stably in environments with temperatures of about 200°C and meet the high-temperature resistance requirements of some medium and low temperature working conditions, the raw material costs of both are too high, causing users to hesitate due to economic issues in the actual promotion and application process, making it difficult to achieve large-scale popularization and application.

[0005] To address the technical shortcomings of polymer filter materials in high-temperature resistance, the industry has adopted ceramic filter materials to replace polymer filter elements. For example, multiple parallel ceramic cyclones are used as the core dust removal components, or ceramic filter cartridges are used as the core dust collection components. However, existing ceramic filter elements have the structural defect of extremely small individual filtration areas. To meet the dust removal efficiency requirements in actual production, it is necessary to significantly increase the number of ceramic filter elements to achieve the superposition of filtration areas. This approach directly leads to a doubling of the overall dust removal equipment volume and a significant increase in equipment investment costs, resulting in a prominent economic disadvantage. Summary of the Invention

[0006] In view of this, the problem to be solved by the present invention is to provide a ceramic filter plate preparation process and the application of ceramic filter plates.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A ceramic filter plate preparation process and its application;

[0009] The manufacturing process of ceramic filter plates includes:

[0010] Ceramic filter tube preparation steps

[0011] S1: After mixing cellulose powder and glycerol liquid in a reaction vessel with water, add silicon nitride powder and diatomaceous earth powder and knead to form a plastic ceramic material.

[0012] S2: The ceramic filter tube is made by extrusion process, which makes the ceramic material form a corrugated tube after being extruded through a tubular die, and then the tube is processed by drying, sintering and cooling processes.

[0013] Coating process steps

[0014] C1: Diatomaceous earth is mixed with a dispersant, and after being ultrasonically treated to achieve uniform dispersion, nano-silica and water glass are added and stirred to form a coating.

[0015] C2: The coating is applied to the surface of the ceramic filter tube, baked to form a film layer, and then calcined to improve the density and thermal shock resistance of the film coating.

[0016] Ceramic filter plate preparation steps

[0017] After bonding the tail end cap to the end of the ceramic filter tube, insert the ceramic filter tube into the positioning hole of the head cover for bonding. After curing, install a seal in the head cover.

[0018] In the preparation steps of the ceramic filter tube, the mass ratios of cellulose powder, glycerol liquid, silicon nitride powder, and diatomaceous earth powder are 7%, 5%, 80%, and 8%, respectively, and the mass of water added is 15% of the total mass ratio of the four materials.

[0019] The mixing temperature is 65℃;

[0020] The stirring paddle rotates at 60 r / min, and the stirring time is 240 min.

[0021] The drying process involves gradual, staged heating and drying in a drying oven equipped with an infrared radiation source, divided into the following stages:

[0022] First stage: Using mid-wave infrared with a wavelength of 2-5μm, a heating temperature of 80-100℃, and a heating time of 1 hour;

[0023] The second stage: long-wave infrared radiation with a wavelength of 5-15μm is used, the heating temperature is 100-150℃, and the heating time is 2h.

[0024] The third stage: long-wave infrared radiation with a wavelength of 5-15μm is used, the heating temperature is 150-180℃, and the heating time is 2h.

[0025] The tube was placed in a nitrogen atmosphere to generate silicon nitride compound. The sintering time and temperature were divided into the following stages:

[0026] Low-temperature section of sintering process: The temperature is raised from room temperature to 600℃ at a rate of 50-100℃ / h;

[0027] In the intermediate temperature section of the sintering process, the temperature is increased from 600℃ to 1200℃ at a rate of 100-200℃ / h.

[0028] High-temperature section of sintering process: The temperature is increased from 1200℃ to 1450℃ at a rate of 50-100℃ / h.

[0029] In the cooling process, the cooling time and temperature are divided into the following stages:

[0030] Cooling process heat preservation section: The temperature is maintained at 1450℃ for 1-4 hours;

[0031] Cooling process: The temperature is reduced from 1450℃ to 1200℃ at a rate of 50-100℃ / h.

[0032] In the cooling process, the temperature range is from 1200℃ to room temperature, with a cooling rate of 100-200℃ / h.

[0033] Before the coating process, nano-silica and diatomaceous earth are pretreated respectively.

[0034] The pretreatment of nano-silica includes: surface modification of nano-silica using a silane coupling agent, followed by ultrasonic dispersion with an ultrasonic power of 200W and a dispersion time of 20min.

[0035] The pretreatment of diatomaceous earth includes: acid treatment with 5%-10% hydrochloric acid, followed by high-temperature calcination at 600-800℃ for 1-2 hours.

[0036] In the coating process, the mass ratio of nano-silica, diatomaceous earth, water glass, and dispersant is 25%:35%:25%:15%.

[0037] In the high-temperature calcination process of the film layer, the calcination temperature is divided into two stages;

[0038] First stage of calcination: The temperature is raised from room temperature to 600℃ at a rate of 50-100℃ / h;

[0039] Second stage of calcination: The temperature is increased from 600℃ to 1000℃ at a rate of 100-200℃ / h; after holding at this temperature for 1 hour, the temperature is decreased from 1000℃ to 600℃ at a rate of 50-100℃ / h; and then decreased from 600℃ to room temperature at a rate of 100-200℃ / h.

[0040] The ceramic filter plate is manufactured using a ceramic filter plate preparation process and is used in a high-temperature dust collector.

[0041] The head sheath of the ceramic filter plate is connected to the cleanroom tube sheet via a three-dimensional flexible sealing strip. Above the double exhaust holes at the head sheath of the ceramic filter plate, there is a compressed air delivery nozzle connected to a pulse solenoid valve.

[0042] The advantages and positive effects of this invention are:

[0043] This process utilizes a wave-shaped design for the ceramic filter tube, which not only increases the filtration area but also features a continuous curved surface with uniform curvature and a smooth, edgeless structure that facilitates dust cleaning. Furthermore, ceramic filter plates manufactured using this process can withstand high-temperature environments up to 500℃, meeting the requirements for small footprint, high filtration efficiency and precision, and good thermal shock resistance, thus providing more options for upgrading and iterating ceramic filter plates. Attached Figure Description

[0044] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0045] In the attached diagram:

[0046] Figure 1 It is the internal microstructure of the ceramic filter tube;

[0047] Figure 2 This is a microscopic view of the internal structure of a ceramic filter tube from a first-person perspective.

[0048] Figure 3 This is a microscopic view of the internal structure of a ceramic filter tube from a second perspective.

[0049] Figure 4 This is a microscopic view of the internal structure of a ceramic filter tube from a third-person perspective.

[0050] Figure 5 This is a diagram of the internal microstructure of a ceramic filter tube from a fourth-angle perspective.

[0051] Figure 6 This is a particle size distribution diagram of the ceramic filter tube;

[0052] Figure 7 This is an overall structural diagram of a ceramic filter plate with a multi-wave shape;

[0053] Figure 8 This is an overall structural diagram of a ceramic filter plate with a single wave shape;

[0054] Figure 9 This is an overall structural diagram of the ceramic filter tube;

[0055] Figure 10 This is an overall structural diagram of the tail end cap;

[0056] Figure 11 This is a diagram showing the overall structure of the headgear;

[0057] Figure 12 This is a test chart of the dust removal efficiency of ceramic filter plates;

[0058] In the picture: 1. Head cover; 2. Ceramic filter tube; 3. Tail end cap. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0062] See Figures 1-6 This invention provides a ceramic filter plate preparation process and an application of the ceramic filter plate; the ceramic filter plate preparation process includes: a ceramic filter tube preparation step, a membrane coating process, and a ceramic filter plate preparation step;

[0063] The steps for preparing ceramic filter tubes include:

[0064] S1: After mixing cellulose powder and glycerol liquid in a reaction vessel with water, add silicon nitride powder and diatomaceous earth powder and knead to form a plastic ceramic material that is easy to extrude in subsequent processes.

[0065] The mass ratios of cellulose powder, glycerol liquid, silicon nitride powder, and diatomaceous earth powder are 7%, 5%, 80%, and 8%, respectively, and the mass of water added is 15% of the total mass ratio of the four materials.

[0066] The mixing temperature is 65℃;

[0067] The stirring paddle rotates at 60 r / min, and the stirring time is 240 min.

[0068] S2: Using an extrusion process, in this embodiment, a twin-screw extruder is used to extrude ceramic material through a tubular die to form a corrugated tube, which is then processed through drying, sintering, and cooling processes to obtain a ceramic filter tube.

[0069] The drying process involves gradual, staged heating and drying in a drying oven equipped with an infrared radiation source, divided into the following stages:

[0070] The first stage: Mid-wave infrared radiation with a wavelength of 2-5 μm is used, the heating temperature is 80-100℃, and the heating time is 1 hour. The purpose is to slowly evaporate the free water on the surface. Since the radiation energy in this band has a high degree of matching with the vibrational energy level of water molecules in the material, and the infrared absorption peak corresponding to the natural vibrational frequency of water molecules is mainly concentrated at 2.7 μm, this band just covers the strong absorption region of water molecules, which can achieve surface evaporation.

[0071] The second stage: long-wave infrared radiation with a wavelength of 5-15μm is used, the heating temperature is 100-150℃, and the heating time is 2h; the energy is absorbed on the surface of the tube blank, and then gradually transferred from the surface to the inside through heat conduction, which accelerates the diffusion of internal moisture.

[0072] The third stage involves using long-wave infrared radiation with a wavelength of 5-15μm, a heating temperature of 150-180℃, and a heating time of 2 hours to remove residual bound water.

[0073] After the drying process is completed, sintering is carried out. In the sintering process, the reaction sintering method is adopted. The tube is placed in a nitrogen atmosphere to generate silicon nitride compound. The sintering time and temperature are divided into the following stages:

[0074] Low-temperature section of sintering process: The temperature is raised from room temperature to 600℃ at a rate of 50-100℃ / h to remove the organic binder in the green body;

[0075] In the intermediate temperature section of the sintering process, the temperature is increased from 600℃ to 1200℃ at a rate of 100-200℃ / h.

[0076] High-temperature section of sintering process: The temperature is raised from 1200℃ to 1450℃ at a rate of 50-100℃ / h. Compared with the first two temperature sections, the heating rate is slowed down, thereby avoiding internal stress in the green body due to thermal shock.

[0077] In the cooling process, the cooling time and temperature are divided into the following stages:

[0078] Cooling process heat preservation section: The temperature is maintained at 1450℃ for 1-4 hours to allow the liquid phase to diffuse fully and control the uniform growth of silicon nitride grains.

[0079] Cooling process cooling section: The temperature is reduced from 1450℃ to 1200℃ at a rate of 50-100℃ / h, so that the liquid phase gradually solidifies, avoiding the problem of internal stress concentration or even cracking caused by excessively rapid cooling.

[0080] In the cooling process, the temperature is reduced from 1200℃ to room temperature at a rate of 100-200℃ / h. After the cooling process is completed, the ceramic filter tube is removed and coated.

[0081] Before the coating process, nano-silica and diatomaceous earth are pretreated respectively.

[0082] The pretreatment of nano-silica includes: using a silane coupling agent to modify the surface of nano-silica, thereby improving its dispersibility in the inorganic binder, and then using ultrasound to disperse it with an ultrasonic power of 200W and a dispersion time of 20min to ensure uniform distribution of nanoparticles.

[0083] The pretreatment of diatomaceous earth includes: acid treatment with 5%-10% hydrochloric acid to improve the purity of diatomaceous earth, and then high-temperature calcination of diatomaceous earth at 600-800℃ for 1-2 hours to enhance compatibility with adhesives.

[0084] The coating process includes:

[0085] C1: Diatomaceous earth is mixed with a dispersant and then ultrasonically dispersed. Nano-silica and water glass are added and stirred to form a coating. The mass ratio of nano-silica, diatomaceous earth, water glass, and dispersant is 25%:35%:25%:15%.

[0086] Water glass, nano-silica, and diatomaceous earth are all mainly composed of silicon-oxygen bonds. By pretreating the surface of diatomaceous earth with a silane coupling agent, the chemical bonding between the three can be enhanced, forming a composite structure of "nanoparticle filling - diatomaceous earth skeleton - water glass bonding". Furthermore, when mixing coating materials, the material properties and synergistic advantages are fully considered.

[0087] The core function of nano-silica is that nanoparticles can fill the micropores of the coating to form a continuous and dense film structure. In addition, the nanoparticles have strong interfacial bonding with the substrate, which can enhance the hardness, wear resistance and impact resistance of the coating.

[0088] The core functions of diatomaceous earth are: its microporous structure can give the coating air permeability and moisture absorption, while providing a dispersion carrier for nano-silica. Its porous structure can also load functional substances such as catalysts, giving the coating additional functions such as self-cleaning. In addition, diatomaceous earth has a low density, which can reduce the overall weight of the coating. The raw materials are both natural and economical. Water glass is used as a film-forming binder, and dispersants are used to improve the compatibility between nanoparticles and diatomaceous earth.

[0089] Water glass is used as a binder for film formation, while dispersants are used to improve the compatibility between nanoparticles and diatomaceous earth.

[0090] C2: The coating is applied to the surface of the ceramic filter tube, baked at 250℃ to form a film layer, and then calcined to improve the density and thermal shock resistance of the film coating.

[0091] In the high-temperature calcination process of the film layer, the calcination temperature is divided into two stages;

[0092] First stage of calcination: The temperature is raised from room temperature to 600℃ at a rate of 50-100℃ / h;

[0093] Second-stage calcination: The temperature is increased from 600℃ to 1000℃ at a rate of 100-200℃ / h; after holding at this temperature for 1 hour, the temperature is decreased from 1000℃ to 600℃ at a rate of 50-100℃ / h; and then decreased from 600℃ to room temperature at a rate of 100-200℃ / h.

[0094] After the high-temperature calcination process of the membrane layer is completed, the coating process of the ceramic filter tube is finished. The internal microstructure of the ceramic filter tube can be found in [reference needed]. Figures 1 to 5 The particle size distribution of ceramic filter tubes can be found in [reference needed]. Figure 6 .

[0095] The preparation steps of ceramic filter plates include:

[0096] After bonding the tail cap 3 to the tail end of the ceramic filter tube 2, insert the ceramic filter tube into the positioning hole of the head cover 1 for bonding. After curing, install a seal in the head cover.

[0097] See Figures 7-11Both the head sleeve 1 and the tail end cap 3 are molded from aluminum alloy or aluminum-magnesium alloy. The sleeve has process holes at both ends, the head sleeve 1 has process grooves around its perimeter, and the head sleeve 1 has a single or multiple rows of through holes in its center. The process holes are vertically connected and serve as bolt fasteners during the installation of the ceramic filter plate. The process grooves are used for inlay sealing, providing a seal between the upper and lower parts during connection. After the tail end cap 3 is bonded to the tail end of the ceramic filter tube, the ceramic filter tube 2 is inserted into the positioning holes of the head sleeve 1 for bonding. After curing, a seal is installed in the head sleeve 1. The positioning holes are arranged in a single or multiple rows in a cross pattern, which can form single / multiple wave shapes such as tubular waves and arranged waves. The wave surface is a continuous curved surface with uniform curvature. Because it has no sharp edges, it is easy to clean thoroughly. The adhesive used is an organic ultra-high temperature silicone adhesive.

[0098] See Figure 12 Through experimental testing, the ceramic filter plate made by this preparation process can withstand a high temperature environment of 500℃. Furthermore, due to the wave structure design of the ceramic filter tube, the filtration area is increased. The wave surface is a continuous curved surface with uniform curvature. The structure without sharp edges makes it easy to clean dust. It meets the requirements of small space requirement, high filtration efficiency and accuracy, and high temperature resistance.

[0099] In the experimental tests, the test method adopted was: ANSI / ASHRAE Standard 52.2-2017, Section 10, for determining particle size efficiency; the sample description was: sintered filter; the sample treatment was: tested as is, without static electricity removal; sample size: 564*767*80mm; effective filtration area: 2.2m²; 100% test flow rate: 132 m³ / h; face velocity: 1 m / min; final pressure drop: 2000 Pa; contaminant (efficiency): KCI; contaminant (load): ASHRAE ash; minimum efficiency reported value (MERV): MERV13@2000 Pa, 1 m / min. Detailed test results can be found in [link to test results]. Figure 12 .

[0100] The ceramic filter plate is manufactured using a ceramic filter plate preparation process and is used in a high-temperature dust collector.

[0101] The head sheath of the ceramic filter plate is connected to the cleanroom tube sheet via a three-dimensional flexible sealing strip. Above the double exhaust holes at the head sheath of the ceramic filter plate, there is a compressed air delivery nozzle connected to a pulse solenoid valve.

[0102] After dust-laden gas enters the high-temperature dust collector, the dust is captured by the ceramic filter plate, while the gas is discharged through the micropores on the corrugated surface of the ceramic filter plate, thus achieving dust control or media separation. When the filtration resistance gradually increases, compressed air is delivered to the compressed air delivery nozzle through the pulse solenoid valve, and then sprayed into the tubular channel of the ceramic filter plate. This causes the gas inside the ceramic filter plate to expand and contract rapidly, resulting in impact vibration for dust removal. The dust on the ceramic filter plate is shaken off and falls, thus achieving dust removal. Since the corrugated surface is a continuous curved surface with uniform curvature and no sharp edges, the problem of dust accumulation in the ceramic filter plate is avoided.

[0103] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. A process for preparing a ceramic filter plate, characterized in that, include: Ceramic filter tube preparation steps S1: After mixing cellulose powder and glycerol liquid in a reaction vessel with water, add silicon nitride powder and diatomaceous earth powder and knead to form a plastic ceramic material. S2: The ceramic filter tube is made by extrusion process, which makes the ceramic material form a corrugated tube after being extruded through a tubular die, and then the tube is processed by drying, sintering and cooling processes. Coating process steps C1: Diatomaceous earth is mixed with a dispersant, and after being ultrasonically treated to achieve uniform dispersion, nano-silica and water glass are added and stirred to form a coating. C2: The coating is applied to the surface of the ceramic filter tube, baked to form a film layer, and then calcined to improve the density and thermal shock resistance of the film coating. Ceramic filter plate preparation steps After bonding the tail end cap to the end of the ceramic filter tube, insert the ceramic filter tube into the positioning hole of the head cover for bonding. After curing, install a three-dimensional flexible sealing strip in the head cover. In the preparation steps of the ceramic filter tube, the mass ratios of cellulose powder, glycerol liquid, silicon nitride powder, and diatomaceous earth powder are 7%, 5%, 80%, and 8%, respectively, and the mass of water added is 15% of the total mass ratio of the four materials. The mixing temperature is 65℃; The stirring paddle rotates at 60 r / min, and the stirring time is 240 min; During the sintering process, the tube is placed in a nitrogen atmosphere to generate silicon nitride compounds. In the coating process, the mass ratio of nano-silica, diatomaceous earth, water glass, and dispersant is 25%:35%:25%:15%.

2. The ceramic filter plate preparation process according to claim 1, characterized in that, The drying process involves gradual, staged heating and drying in a drying oven equipped with an infrared radiation source, divided into the following stages: First stage: Using mid-wave infrared with a wavelength of 2-5μm, a heating temperature of 80-100℃, and a heating time of 1 hour; The second stage: long-wave infrared radiation with a wavelength of 5-15μm is used, the heating temperature is 100-150℃, and the heating time is 2h. The third stage: long-wave infrared radiation with a wavelength of 5-15μm is used, the heating temperature is 150-180℃, and the heating time is 2h.

3. The ceramic filter plate preparation process according to claim 1, characterized in that, The sintering time and temperature are divided into the following stages: Low-temperature section of sintering process: The temperature is raised from room temperature to 600℃ at a rate of 50-100℃ / h; In the intermediate temperature section of the sintering process, the temperature is increased from 600℃ to 1200℃ at a rate of 100-200℃ / h. High-temperature section of sintering process: The temperature is increased from 1200℃ to 1450℃ at a rate of 50-100℃ / h.

4. The ceramic filter plate preparation process according to claim 1, characterized in that, In the cooling process, the cooling time and temperature are divided into the following stages: Cooling process heat preservation section: The temperature is maintained at 1450℃ for 1-4 hours; Cooling process: The temperature is reduced from 1450℃ to 1200℃ at a rate of 50-100℃ / h. In the cooling process, the temperature range is from 1200℃ to room temperature, with a cooling rate of 100-200℃ / h.

5. The ceramic filter plate preparation process according to claim 1, characterized in that, Before the coating process, nano-silica and diatomaceous earth are pretreated respectively. The pretreatment of nano-silica includes: surface modification of nano-silica using a silane coupling agent, followed by ultrasonic dispersion with an ultrasonic power of 200W and a dispersion time of 20min. The pretreatment of diatomaceous earth includes: acid treatment with 5%-10% hydrochloric acid, followed by high-temperature calcination at 600-800℃ for 1-2 hours.

6. The ceramic filter plate preparation process according to claim 1, characterized in that, In the high-temperature calcination process of the film layer, the calcination temperature is divided into two stages; First stage of calcination: The temperature is raised from room temperature to 600℃ at a rate of 50-100℃ / h; Second stage of calcination: The temperature is increased from 600℃ to 1000℃ at a rate of 100-200℃ / h; after holding at this temperature for 1 hour, the temperature is decreased from 1000℃ to 600℃ at a rate of 50-100℃ / h; and then decreased from 600℃ to room temperature at a rate of 100-200℃ / h.

7. Application of ceramic filter plates, wherein the ceramic filter plates are manufactured using the ceramic filter plate preparation process described in any one of claims 1-6, characterized in that, The ceramic filter plate is used in a high-temperature dust collector.

8. The application of the ceramic filter plate according to claim 7, characterized in that, The head sheath of the ceramic filter plate is connected to the cleanroom tube sheet via a three-dimensional flexible sealing strip. Above the double exhaust holes at the head sheath of the ceramic filter plate, there is a compressed air delivery nozzle connected to a pulse solenoid valve.

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