A double-pleated ceramic fiber light porcelain microporous gas and liquid filter cartridge, formula and preparation method thereof

Abstract

The application discloses a double-crimp type ceramic fiber light porcelain microporous gas and liquid filter cartridge and a preparation method and formula thereof, and comprises the following steps: step 1, preparing mixed powder; step 2, preparing mixed plastic adhesive; step 3, preparing mixed green body mud; step 4, preparing a 3D double-crimp type ceramic fiber light porcelain microporous gas and liquid filter cartridge printing program control file; step 5, 3D double-crimp type ceramic fiber light porcelain microporous gas and liquid filter cartridge green body printing forming; step 6, filter cartridge high-temperature sintering forming; step 7, preparing desulfurization and denitration spraying liquid; and step 8, spraying the desulfurization and denitration spraying liquid on the outer surface of the filter cartridge. The application can greatly improve the filtering area, filtering efficiency, filtering precision and filter cartridge strength, and adopts a green and environment-friendly catalyst which is non-toxic and harmless.

Description

Technical Field

[0001] This invention relates to the technical field of high-temperature dust removal, desulfurization, and denitrification gas and liquid microporous filter cartridges. Specifically, it relates to a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge, its formula, and its preparation method. Background Technology

[0002] Currently, integrated ceramic fiber desulfurization, denitrification, and dust removal filter tubes cannot be manufactured with a pleated structure, resulting in large volume, low strength, and small filtration area. This leads to high initial resistance, high operating costs, and high energy consumption during use. They are not formed through high-temperature sintering but are cured using adhesives, requiring auxiliary electric heating when the system is shut down, and cannot perform liquid filtration. The specifications are 150X110X3000 mm, with a filtration area of ​​1.4 m².

[0003] The existing 16-pleated microporous filter cartridge for desulfurization, denitrification, and dust removal of gas and liquid is made of ceramic fiber and quartz powder, sintered into a pleated filter cartridge. Due to the poor compatibility of the two main raw materials, the proportion of embedded and peritectic crystals in its microcrystalline structure is excessive, causing crystal structure distortion, reduced strength, and poor physical and filtration performance of the filter cartridge. Furthermore, this filter cartridge is produced by extrusion molding and hot pressing, resulting in a uniform-diameter pleated cylinder body with a spherical end cap at the bottom and a flange green blank at the top. These three green blanks are then assembled into a single green blank using an insert-bonding method, followed by sintering. There is a potential strength risk at each bonded joint during backflushing and dust removal during operation. The 150X100X3000 mm specification results in a filtration area of ​​less than 3 square meters.

[0004] In particular, both of the aforementioned traditional desulfurization, denitrification, and dust removal microporous filter tubes and cartridges use a mixture of vanadium-based catalytic catalyst and titanium-based carrier as a coating on the outer surface of the filter tubes and cartridges. Because vanadium pentoxide is a highly toxic product, the filter tubes and cartridges become hazardous solid waste after their service life is complete, posing significant challenges and difficulties in achieving environmental compliance during storage and treatment. Summary of the Invention

[0005] The purpose of this invention is to economically and efficiently solve the various defects of existing filter tubes and filter cartridges in the above-mentioned background technology, and to provide a desulfurization, denitrification and dust removal double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge with excellent physical properties, filtration performance, economy, environmental protection and energy saving, and both inner and outer surfaces being filtration areas, as well as its formula and preparation method.

[0006] The technical solution adopted in this invention is:

[0007] A method for preparing a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge includes the following steps:

[0008] Step 1: Prepare the mixed powder;

[0009] Step 2: Prepare the mixed plasticizer adhesive;

[0010] Step 3: Prepare the mixed green clay mixture;

[0011] Step 4: Compile the printing control file for the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge;

[0012] Step 5: Printing and shaping of 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge green body;

[0013] Step 6: High-temperature sintering of the filter cartridge;

[0014] Step 7: Prepare the desulfurization and denitrification spray solution;

[0015] Step 8: Spray desulfurization and denitrification spray solution on the outer surface of the filter cartridge.

[0016] A formula for a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge, wherein step 1, preparing the mixed powder, includes the following raw materials: aluminum silicate fiber, titanium dioxide, and bamboo powder.

[0017] ① Take 14-19 parts of aluminum silicate fiber by weight, with a diameter of 2-4 μm and a fiber length of 2-4 mm;

[0018] ② Take 0.5-2 parts of titanium dioxide by mass. The titanium dioxide is industrial pure grade titanium dioxide with a particle size of 320 mesh.

[0019] ③ Take 2.5 to 4 parts of bamboo powder by weight, with a particle size of 200 mesh;

[0020] ④ Place the above raw materials into a high-speed powder mixer; start the high-speed powder mixer and mix for 15 minutes to obtain the mixed powder.

[0021] The preparation of the mixed powder in step 1 includes the following raw materials: 16 parts by mass of aluminum silicate fiber, 1 part by mass of titanium dioxide, and 3 parts by mass of bamboo powder, which are placed in a high-speed powder mixer and stirred for 15 minutes to obtain the mixed powder.

[0022] Step 2, preparing the mixed plasticizer adhesive, includes the following raw materials: liquid aluminum dihydrogen phosphate, silica sol, adhesive, guar gum powder, hydroxypropyl methylcellulose, glutinous rice flour, and purified water;

[0023] ① Take 16-24 parts of liquid aluminum dihydrogen phosphate by mass.

[0024] ② Take 4-9 parts of silica sol by weight;

[0025] ③ Take 0.3 to 1 part of the adhesive by weight;

[0026] ④ Take 0.1-0.5 parts of guar gum powder by weight;

[0027] ⑤ Take 0.3 to 1 part of hydroxypropyl methylcellulose by weight.

[0028] ⑥ Take 1.5 to 3 parts of glutinous rice flour by weight;

[0029] ⑦ Take 1-10 parts of purified water by weight;

[0030] Place the above raw materials into an electrically heated enamel-lined reactor, start the anchor-type stirring paddle enamel-lined reactor, and stir at a speed of 80 rpm while heating to 96°C. Keep stirring at this temperature for 5 minutes to obtain the mixed plasticizer adhesive.

[0031] Step 3, preparing the mixed green body mixture, includes the following raw materials:

[0032] ①Put all the mixed powder prepared in step 1 and the mixed plasticizer prepared in step 2 into the hopper of the mixing and plowing machine;

[0033] ② Take 40-75 parts by weight of lightweight porcelain clay and put it into the hopper of the mixing and kneading machine;

[0034] ③ Start the mixing and kneading machine and knead repeatedly at a speed of 85 rpm for 3 times to obtain green clay with ideal plasticity and viscosity.

[0035] Step 4 involves compiling the printing control file for the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge.

[0036] Based on the structural diagram of the double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge, design and compile the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge printing program control file, and input it into the 3D printer touch screen program control system.

[0037] In step 5, the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge green body is printed and formed.

[0038] ① Load the prepared mixed green clay into the hopper of the 3D pleated ceramic fiber lightweight porcelain microporous gas and liquid filter cartridge printer;

[0039] ② Start the 3D ceramic fiber lightweight porcelain printer; after 6 hours and 15 minutes, the 3D ceramic fiber lightweight porcelain printer automatically prints according to the input design program, while maintaining a constant temperature to heat and shape the printed filter cartridge green body, giving it a certain initial strength. Finally, it prints a 1500mm long, 150mm outer diameter, 100mm inner diameter, 32 to 40 pleats, 25mm fold height, and 4.5mm wall thickness spherical, flange, and equal diameter double dense pleats integrated into a dense pleated ceramic fiber lightweight porcelain microporous gas and liquid filter cartridge green body. Transfer the filter cartridge green body to a ventilated and dry place to dry and sinter.

[0040] In step 6, the filter cartridge is sintered at high temperature to form a shape.

[0041] The dried filter cartridge greens are placed on the sintering support of the shuttle sintering furnace trolley. Using the flanges of the greens, they are supported and positioned on the sintering support. After the greens are fully packed, the trolley is smoothly and evenly moved into the furnace chamber of the shuttle sintering furnace. The furnace door is closed, and the furnace is started. The filter cartridge sintering process parameters are input into the programmable touchscreen of the shuttle sintering furnace, allowing it to automatically sinter the filter cartridges according to the program. When the temperature control parameters displayed on the shuttle sintering furnace screen reach the specified values... When the temperature in the production area drops below 205℃, the shuttle sintering furnace is closed. When the furnace cools naturally to 105℃, the furnace door is opened, and the trolley inside the furnace is moved out smoothly and at a constant speed. When the temperature of the microporous filter cartridge on the trolley drops below 30℃, the sintered microporous filter cartridge is removed from the hanger and placed with the flange face down in the designated work area. After blowing the dust off the inside and outside of the microporous filter cartridge with a compressed air spray gun, it is inspected, packaged, and put into storage, which is the finished white tube microporous filter cartridge.

[0042] Step 7, preparing the desulfurization and denitrification spraying liquid, includes the following raw materials: desulfurization and denitrification spraying liquid powder and desulfurization and denitrification spraying liquid adhesive;

[0043] ①The desulfurization and denitrification spraying liquid powder includes the following raw materials: yttrium oxide, tungsten oxide, nano-sized titanium dioxide and aluminum oxide;

[0044] Take 7-13 parts by weight of yttrium oxide, 5-8 parts by weight of tungsten oxide, 70-85 parts by weight of nano-sized titanium dioxide, and 8-15 parts by weight of aluminum oxide. Put all the raw materials into an enamel mixing tank, start the paddle agitator of the enamel mixing tank, and stir at a speed of 110 rpm for 20 minutes.

[0045] ②The adhesive for the desulfurization and denitrification spraying liquid includes the following raw materials: liquid aluminum dihydrogen phosphate and silica sol;

[0046] Take 65-75 parts by weight of liquid aluminum dihydrogen phosphate and 25-38 parts by weight of silica sol, and put them together into an enamel mixing tank; start the paddle agitator of the enamel mixing tank and stir for 15 minutes at a speed of 85 rpm to prepare the desulfurization and denitrification spray adhesive for later use.

[0047] ③The preparation method of the desulfurization and denitrification spraying solution is as follows:

[0048] Take 65-70 parts by weight of the prepared desulfurization and denitrification spray adhesive and 25-38 parts by weight of the prepared desulfurization and denitrification spray powder, and put them into an enamel mixing tank; start the anchor-type agitator of the enamel mixing tank and stir at 100 rpm for 20 minutes to prepare the desulfurization and denitrification spray.

[0049] In step 8, the desulfurization and denitrification spray solution prepared in step 7 is evenly sprayed twice on the inner and outer surfaces of the microporous filter cartridge white cylinder finished product after sintering and inspection in step 6 using a paint spray gun, so that the coating thickness reaches 0.20~0.25mm. After the microporous filter cartridge white cylinder is sprayed with desulfurization and denitrification spray solution, it is air-dried at room temperature for 3 hours, then placed in a microwave heating oven to dry for 60 minutes. After that, it is taken out for testing, packaged, and put into storage, which is the finished product of double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge yellow cylinder.

[0050] The advantages of this invention are: it can significantly improve the filtration area, filtration efficiency, filtration accuracy and filter cartridge strength, and uses a green and environmentally friendly catalyst that is non-toxic and harmless. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the external structure of the filter cartridge of the present invention.

[0052] Figure 2 This is a three-dimensional structural cross-sectional view of the filter cartridge of the present invention.

[0053] Figure 3 This is a graph showing the sintering process technology of the filter cartridge of the present invention. Detailed Implementation

[0054] The following is in conjunction with the instruction manual appendix. Figure 1-3 The present invention will be further described in detail below with reference to preferred embodiments. The solutions and advantages of this application will become clear to those skilled in the art. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention.

[0055] A double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge, its formula, and preparation method include the following steps:

[0056] Step 1: Prepare the mixed powder;

[0057] Step 2: Prepare the mixed plasticizer adhesive;

[0058] Step 3: Prepare the mixed green clay mixture;

[0059] Step 4: Compile the printing control file for the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge;

[0060] Step 5: Printing and shaping of 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge green body;

[0061] Step 6: High-temperature sintering of the filter cartridge;

[0062] Step 7: Prepare the desulfurization and denitrification spray solution;

[0063] Step 8: Spray desulfurization and denitrification spray solution onto the outer surface of the filter cartridge.

[0064] The step 1 of preparing the mixed powder includes the following raw materials: aluminum silicate fiber, titanium dioxide and bamboo powder;

[0065] ① Take 14-19 parts of aluminum silicate fiber by weight, with a diameter of 2-4 μm and a fiber length of 2-4 mm;

[0066] ② Take 0.5-2 parts of titanium dioxide by mass. The titanium dioxide is industrial pure grade titanium dioxide with a particle size of 320 mesh.

[0067] ③ Take 2.5 to 4 parts of bamboo powder by weight, with a particle size of 200 mesh;

[0068] ④ Place the above raw materials into a high-speed powder mixer; start the high-speed powder mixer and mix for 15 minutes to obtain the mixed powder.

[0069] Step 1 involves preparing the mixed powder using the following raw materials: 16 parts by weight of aluminum silicate fiber, 1 part by weight of titanium dioxide, and 3 parts by weight of bamboo powder. These are placed in a high-speed powder mixer and stirred for 15 minutes to obtain the mixed powder.

[0070] Step 2, preparing the mixed plasticizer adhesive, includes the following raw materials: liquid aluminum dihydrogen phosphate, silica sol, adhesive, guar gum powder, hydroxypropyl methylcellulose, glutinous rice flour, and purified water;

[0071] ① Take 16-24 parts of liquid aluminum dihydrogen phosphate by mass.

[0072] ② Take 4-9 parts of silica sol by weight;

[0073] ③ Take 0.3 to 1 part of the adhesive by weight;

[0074] ④ Take 0.1-0.5 parts of guar gum powder by weight;

[0075] ⑤ Take 0.3 to 1 part of hydroxypropyl methylcellulose by weight.

[0076] ⑥ Take 1.5 to 3 parts of glutinous rice flour by weight;

[0077] ⑦ Take 1-10 parts of purified water by weight;

[0078] Place the above raw materials into an electrically heated enamel-lined reactor, start the anchor-type stirring paddle enamel-lined reactor, and stir at a speed of 80 rpm while heating to 96°C. Keep stirring at this temperature for 5 minutes to obtain the mixed plasticizer adhesive.

[0079] A further embodiment of step 2 of the present invention is as follows: Take 18 parts by mass percentage of liquid aluminum dihydrogen phosphate, 6 parts of silica sol, 0.5 parts of binder, 0.2 parts of guar gum powder, 0.5 parts of hydroxypropyl methylcellulose, 2 parts of glutinous rice flour, and 5 parts of purified water. Place the above raw materials into an electrically heated enamel-lined reactor, start the anchor-type stirring paddle enamel-lined reactor, and heat to 96°C while stirring at a stirring speed of 80 rpm. Maintain the temperature and stir for 5 minutes to obtain the mixed plasticizer adhesive.

[0080] Step 3, preparing the mixed green body mixture, includes the following raw materials:

[0081] ①Put all the mixed powder prepared in step 1 and the mixed plasticizer prepared in step 2 into the hopper of the mixing and plowing machine;

[0082] ② Take 40-75 parts by weight of lightweight porcelain clay and put it into the hopper of the mixing and kneading machine;

[0083] ③ Start the mixing and kneading machine and knead repeatedly at a speed of 85 rpm for 3 times to obtain green clay with ideal plasticity and viscosity.

[0084] A further embodiment of step 3 of the present invention is as follows: The mixed powder prepared in step 1 and the mixed plasticizer prepared in step 2 are all placed into the hopper of the mixing and kneading machine; 50 parts of lightweight kaolin clay with a moisture content of 25% are placed into the hopper of the mixing and kneading machine. The mixing and kneading machine is started and repeatedly kneaded 3 times at a speed of 85 rpm to obtain green clay with ideal plasticity and viscosity.

[0085] Step 4 involves compiling the printing control file for the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge.

[0086] Based on the structural diagram of the double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge, design and compile the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge printing program control file, and input it into the 3D printer touch screen program control system.

[0087] In step 5, the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge green body is printed and formed.

[0088] ① Load the prepared mixed green clay into the hopper of the 3D pleated ceramic fiber lightweight porcelain microporous gas and liquid filter cartridge printer;

[0089] ② Start the 3D ceramic fiber lightweight porcelain printer; after 6 hours and 15 minutes, the 3D ceramic fiber lightweight porcelain printer automatically prints according to the input design program, while maintaining a constant temperature to heat and shape the printed filter cartridge green body. See below. Figure 1 , 2It has a certain initial strength, and finally prints a 1500mm long, 150mm outer diameter, 100mm inner diameter, 32 pleats. Depending on the specific needs, the number of pleats can be printed up to 40, with a fold height of 25mm and a wall thickness of 4.5mm. The spherical, flange, and equal-diameter double dense pleats are integrally formed into a dense pleated ceramic fiber lightweight ceramic microporous gas and liquid filter blank. The filter blank is then transferred to a ventilated and dry place to dry and sinter.

[0090] In step 6, the filter cartridge is sintered at high temperature to form a shape.

[0091] The dried filter cartridge blanks are placed on the sintering support of the shuttle sintering furnace trolley. Using the flanges of the filter cartridge blanks, they are supported and positioned on the sintering support. After the blanks are fully packed, the trolley is moved smoothly and at a constant speed into the furnace chamber. The furnace door is closed, and the furnace is started. The filter cartridge sintering process parameters are input into the programmable touchscreen of the shuttle sintering furnace, allowing it to automatically sinter the filter cartridges according to the program. When the temperature of each temperature control zone displayed on the shuttle sintering furnace screen drops below 205℃, the furnace is closed. The furnace is allowed to cool naturally to 105℃. The furnace door is then opened, and the trolley is moved smoothly and at a constant speed out of the furnace chamber. Once the temperature of the microporous filter cartridges on the trolley drops below 30℃, the sintered microporous filter cartridges are removed from the hanger and placed flange-side down in the designated work area. After blowing dust off the inner and outer walls of the microporous filter cartridge with a compressed air spray gun, it is inspected, packaged, and put into storage, which is the finished white microporous filter cartridge.

[0092] Step 7, preparing the desulfurization and denitrification spraying liquid, includes the following raw materials: desulfurization and denitrification spraying liquid powder and desulfurization and denitrification spraying liquid adhesive;

[0093] ①The desulfurization and denitrification spraying liquid powder includes the following raw materials: yttrium oxide, tungsten oxide, nano-sized titanium dioxide and aluminum oxide;

[0094] Take 7-13 parts by weight of yttrium oxide, 5-8 parts by weight of tungsten oxide, 70-85 parts by weight of nano-sized titanium dioxide, and 8-15 parts by weight of aluminum oxide. Put all the raw materials into an enamel mixing tank, start the paddle agitator of the enamel mixing tank, and stir at a speed of 110 rpm for 20 minutes.

[0095] ②The adhesive for the desulfurization and denitrification spraying liquid includes the following raw materials: liquid aluminum dihydrogen phosphate and silica sol;

[0096] Take 65-75 parts by weight of liquid aluminum dihydrogen phosphate and 25-38 parts by weight of silica sol, and put them together into an enamel mixing tank; start the paddle agitator of the enamel mixing tank and stir for 15 minutes at a speed of 85 rpm to prepare the desulfurization and denitrification spray adhesive for later use.

[0097] ③The preparation method of the desulfurization and denitrification spraying solution is as follows:

[0098] Take 65-70 parts by weight of the prepared desulfurization and denitrification spray adhesive and 25-38 parts by weight of the prepared desulfurization and denitrification spray powder, and put them into an enamel mixing tank; start the anchor-type agitator of the enamel mixing tank and stir at 100 rpm for 20 minutes to prepare the desulfurization and denitrification spray.

[0099] A further embodiment of the present invention involves taking 66 parts by weight of the desulfurization and denitrification spray adhesive and 34 parts by weight of the desulfurization and denitrification spray powder, and placing them into an enamel mixing tank; starting the anchor-type agitator of the enamel mixing tank and stirring at a speed of 100 rpm for 20 minutes to prepare the desulfurization and denitrification spray.

[0100] In step 8, the desulfurization and denitrification spray solution prepared in step 7 is evenly sprayed twice on the inner and outer surfaces of the microporous filter cartridge white cylinder finished product after sintering and inspection in step 6 using a paint spray gun, so that the coating thickness reaches 0.20~0.25mm. After the microporous filter cartridge white cylinder is sprayed with desulfurization and denitrification spray solution, it is air-dried at room temperature for 3 hours, then placed in a microwave heating oven to dry for 60 minutes. After that, it is taken out for testing, packaged, and put into storage, which is the finished product of double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge yellow cylinder.

[0101] Effect testing instructions:

[0102] 1. Employing a double-pleated design, with both inner and outer surfaces serving as filtration areas, and a spherical impact-resistant bottom structure, this filter measures 150mm outer diameter, 50mm inner diameter, 4.5mm wall thickness, and 1500mm cylinder height, achieving high strength and high yield. Compared to ceramic fiber microporous filter tubes of the same volume, it offers more than 5 times the surface area, 25% increased strength, and more than half the initial resistance, significantly improving filtration accuracy and efficiency. Available in a 150x50x1500mm specification, achieving a filtration area of ​​4㎡.

[0103] 2. Using high-performance aluminosilicate short-cut fibers and lightweight kaolin as the main raw materials, the optimal ratio of various raw materials and process technology conditions was optimized through orthogonal experimental design. This achieved the optimization, modification, and enhancement of the traditional crystal structure, forming a uniformly distributed three-dimensional whisker and a stable octahedral polygonal crystal structure. This solved the technical challenge of achieving good interfusion during the high-temperature sintering and vitrification of filter cartridge raw materials, resulting in fine, tortuous, and uniformly distributed crystals with well-developed pores, ensuring low resistance, high efficiency, and high precision of the filter cartridge.

[0104] 3. Using aluminum dihydrogen phosphate and silica sol as two inorganic high-temperature binders solves the initial strength problem of green body forming. On the other hand, because aluminum dihydrogen phosphate and silica sol can generate alumina and silicon oxide that are fused with aluminum oxide crystals at high temperatures, it is beneficial for the modified aluminum oxide whiskers to expand in three dimensions, thus solving the technical problem of filter cartridge crystal structure stability and increasing filter cartridge strength.

[0105] 4. The 3D printing method for forming double-pleated filter cartridges has ideally solved the technical bottleneck problem of high strength, large aspect ratio, and high yield of green bodies, which are complex shapes with double pleats, both inner and outer surfaces having dense pleats for effective filtration, and a spherical impact-resistant structure at the bottom. This method cannot achieve the same results using other existing traditional ceramic green body forming processes.

[0106] 5. Using yttrium oxide and tungsten oxide as the main and secondary catalysts, nano-anatase titanium dioxide as the catalyst carrier, and inorganic aluminum dihydrogen phosphate and silica sol as high-temperature binders, the raw materials and process technology parameters were optimized through orthogonal experimental design to prepare a desulfurization and denitrification spraying solution. This solution was sprayed onto the inner and outer surfaces of the fired double-pleated ceramic fiber microporous filter cartridge, solving the technical problems of vanadium-based catalysts in traditional ceramic fiber microporous filter tubes being easily poisoned and ineffective, toxic, and the old tubes becoming hazardous waste and causing environmental pollution after replacement.

[0107] It possesses excellent filtration performance, physical properties, and economic and technical performance. It can be widely used in industries such as steel, cement, coal, smelting, electrolytic aluminum, thermal power generation, petrochemical, coal chemical, automotive, pharmaceutical, electronics, military, biochemical synthesis, purification, urban sewage treatment, solid-liquid separation, oil-water separation, gas-solid separation, and high-temperature dust removal.

[0108] Comparison table of technical performance with peers in the same industry: .

Claims

1. A method for preparing a double-pleated ceramic fiber lightweight ceramic microporous gas-liquid filter cartridge, characterized in that, Includes the following steps: Step 1: Prepare the mixed powder; Step 2: Prepare the mixed plasticizer adhesive; Step 3: Prepare the mixed green clay. The raw materials for the mixed green clay include lightweight porcelain clay. Step 4: Compile the printing control file for the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge; Step 5: Print the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge green body. Finally, print the green body of the pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge with a length of 1500mm, an outer diameter of 150mm, an inner diameter of 100mm, a number of pleats of 32 to 40, a fold height of 25mm, and a wall thickness of 4.5mm. The green body is made of spherical, flange, and equal diameter double-pleated integrated mold. Step 6: High-temperature sintering of the filter cartridge; Step 7: Prepare the desulfurization and denitrification spray solution; Step 8: Spray desulfurization and denitrification spray liquid on the outer surface of the filter cartridge. The desulfurization and denitrification spray liquid includes the following raw materials: desulfurization and denitrification spray liquid powder and desulfurization and denitrification spray liquid adhesive; the desulfurization and denitrification spray liquid powder includes the following raw materials: yttrium oxide, tungsten oxide, nano-sized titanium dioxide and aluminum oxide.

2. The preparation method of the double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 1, characterized in that, in, Step 1 involves preparing the mixed powder, which includes the following raw materials: aluminum silicate fiber, titanium dioxide, and bamboo powder; ① Take 14-19 parts of aluminum silicate fiber by weight, with a diameter of 2-4 μm and a fiber length of 2-4 mm; ② Take 0.5-2 parts of titanium dioxide by mass. The titanium dioxide is industrial pure grade titanium dioxide with a particle size of 320 mesh. ③ Take 2.5 to 4 parts of bamboo powder by weight, with a particle size of 200 mesh; ④ Place the above raw materials into a high-speed powder mixer; start the high-speed powder mixer and mix for 15 minutes to obtain the mixed powder.

3. The method for preparing a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 2, characterized in that, Step 1 involves preparing the mixed powder using the following raw materials: 16 parts by weight of aluminum silicate fiber, 1 part by weight of titanium dioxide, and 3 parts by weight of bamboo powder. These are placed in a high-speed powder mixer and stirred for 15 minutes to obtain the mixed powder.

4. The method for preparing a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 1, characterized in that, in, Step 2 involves preparing the mixed plasticizer adhesive, which includes the following ingredients: liquid aluminum dihydrogen phosphate, silica sol, binder, guar gum powder, hydroxypropyl methylcellulose, glutinous rice flour, and purified water; ① Take 16-24 parts of liquid aluminum dihydrogen phosphate by mass. ② Take 4-9 parts of silica sol by weight; ③ Take 0.3 to 1 part of the adhesive by weight; ④ Take 0.1-0.5 parts of guar gum powder by weight; ⑤ Take 0.3 to 1 part of hydroxypropyl methylcellulose by weight. ⑥ Take 1.5 to 3 parts of glutinous rice flour by weight; ⑦ Take 1-10 parts of purified water by weight; Place the above raw materials into an electrically heated enamel-lined reactor, start the anchor-type stirring paddle enamel-lined reactor, and stir at a speed of 80 rpm while heating to 96°C. Keep stirring at this temperature for 5 minutes to obtain the mixed plasticizer adhesive.

5. The preparation method of the double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 1, Its features are, Step 3, preparing the mixed green body mixture, includes the following raw materials: ①Put all the mixed powder prepared in step 1 and the mixed plasticizer prepared in step 2 into the hopper of the mixing and plowing machine; ② Take 40-75 parts of lightweight kaolin by weight and put it into the hopper of the mixing and kneading machine; ③ Start the mixing and kneading machine and knead repeatedly at a speed of 85 rpm for 3 times to obtain green clay with ideal plasticity and viscosity.

6. The method for preparing a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 1, characterized in that, in, Step 4: Compile the printing control file for the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge; Based on the structural diagram of the double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge, design and compile the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge printing program control file, and input it into the 3D printer touch screen program control system.

7. The method for preparing a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 1, characterized in that, in, In step 5, the 3D double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge green body is printed and formed. ① Load the prepared mixed green clay into the hopper of the 3D pleated ceramic fiber lightweight porcelain microporous gas and liquid filter cartridge printer; ② Start the 3D ceramic fiber lightweight porcelain printer; after 6 hours and 15 minutes, the 3D ceramic fiber lightweight porcelain printer will automatically print according to the input design program, and keep the temperature constant while printing to heat and shape the printed filter cartridge green body, so that it has a certain initial strength. Transfer the printed filter cartridge green body to a ventilated and dry place to dry and wait for sintering.

8. The method for preparing a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 1, characterized in that, in, Step 6: The filter cartridge is sintered at high temperature to form its shape; The dried filter cartridge greens are placed on the sintering support of the shuttle sintering furnace trolley. Using the flanges of the greens, they are supported and positioned on the sintering support. After the greens are fully packed, the trolley is smoothly and evenly moved into the furnace chamber of the shuttle sintering furnace. The furnace door is closed, and the furnace is started. The filter cartridge sintering process parameters are input into the programmable touchscreen of the shuttle sintering furnace, allowing it to automatically sinter the filter cartridges according to the program. When the temperature control parameters displayed on the shuttle sintering furnace screen reach the specified values... When the temperature in the production area drops below 205℃, the shuttle sintering furnace is closed. When the furnace cools naturally to 105℃, the furnace door is opened, and the trolley inside the furnace is moved out smoothly and at a constant speed. When the temperature of the microporous filter cartridge on the trolley drops below 30℃, the sintered microporous filter cartridge is removed from the hanger and placed with the flange face down in the designated work area. After blowing the dust off the inside and outside of the microporous filter cartridge with a compressed air spray gun, it is inspected, packaged, and put into storage, which is the finished white tube microporous filter cartridge.

9. The preparation method of the double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 1, Its features are, In step 7, the desulfurization and denitrification spraying solution is prepared as follows: ①The desulfurization and denitrification spraying liquid powder shall be made of 7-13 parts by mass of yttrium oxide, 5-8 parts by mass of tungsten oxide, 70-85 parts by mass of nano-grade titanium dioxide, and 8-15 parts by mass of aluminum oxide. All raw materials shall be put into an enamel mixing tank, and the paddle agitator of the enamel mixing tank shall be started and stirred at a speed of 110 rpm for 20 minutes before use. ②The adhesive for the desulfurization and denitrification spraying liquid includes the following raw materials: liquid aluminum dihydrogen phosphate and silica sol; Take 65-75 parts by weight of liquid aluminum dihydrogen phosphate and 25-38 parts by weight of silica sol, and put them together into an enamel mixing tank; start the paddle agitator of the enamel mixing tank and stir for 15 minutes at a speed of 85 rpm to prepare the desulfurization and denitrification spray adhesive for later use. ③The preparation method of the desulfurization and denitrification spraying solution is as follows: Take 65-70 parts by weight of the prepared desulfurization and denitrification spray adhesive and 25-38 parts by weight of the prepared desulfurization and denitrification spray powder, and put them into an enamel mixing tank; start the anchor-type agitator of the enamel mixing tank and stir at 100 rpm for 20 minutes to prepare the desulfurization and denitrification spray.

10. The method for preparing a double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge according to claim 1, characterized in that, in, Step 8: Using a paint spray gun, evenly spray two coats of the desulfurization and denitrification spray solution prepared in Step 7 onto the inner and outer surfaces of the finished microporous filter cartridge (white tube) after sintering and inspection in Step 6, so that the coating thickness reaches 0.20~0.25mm. After the microporous filter cartridge (white tube) with the desulfurization and denitrification spray solution is sprayed, let it air dry at room temperature for 3 hours, then put it into a microwave heating oven to dry for 60 minutes. After that, take it out for testing, package it, and put it into storage. This is the finished product of the double-pleated ceramic fiber lightweight ceramic microporous gas and liquid filter cartridge (yellow tube).

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