Preparation method of microporous ceramic water purification filter element

Abstract

The invention discloses a preparation method of a microporous ceramic water purification filter element, and belongs to the technical field of water filtering materials, the water purification filter element is prepared from the following raw materials by weight: 33-50 parts of diatomite, 22-32 parts of pottery clay, 12-22 parts of light calcium carbonate, 8-18 parts of aluminum hydroxide, an additive and water, and the additive includes but is not limited to a surfactant, a suspending agent or a water reducer. Inorganic food-grade substances such as diatomite, pottery clay, light calcium carbonate, aluminum hydroxide, an additive, water and the like are used as raw materials, and the water purification filter element which is high in filtering precision, long in service life, convenient to clean and regenerate, free of secondary pollution and high in filtering speed can be produced after a series of working procedures of grinding, sieving, aging, forming, drying, high-temperature sintering, polishing, soaking, washing and re-drying. The produced water purification filter element can meet the national drinking water treatment equipment standard requirements in all aspects, meanwhile, the preparation method is easy to operate, and the qualified rate of finished products is high.

Description

Technical Field

[0001] This invention relates to the field of water filtration materials technology, specifically a method for preparing a microporous ceramic water purification filter element. Background Technology

[0002] With the development of human industry, water pollution has become increasingly serious, and the hygiene of drinking water has become a global concern. Currently, nearly 2,200 kinds of organic pollutants have been detected in water worldwide, seriously endangering human health. Therefore, technicians utilize filter materials to treat water, separating heavy metals or harmful components. This involves installing water purifier cartridges containing filter materials in water purifiers to achieve water filtration. Currently, existing water purifier cartridges mainly use filter materials such as honeycomb ceramics, filter paper, and wire mesh. Among these, honeycomb ceramics are the most effective at filtering heavy metals or harmful components in water. However, the raw material selection for honeycomb ceramic filter materials is unreasonable, resulting in high production costs. Furthermore, the manufacturing process is relatively outdated and cannot meet the demands of continuous technological development.

[0003] Therefore, further improvements are necessary. Summary of the Invention

[0004] The present invention aims to provide a method for preparing a microporous ceramic water purification filter element to overcome the shortcomings of the prior art.

[0005] A method for preparing a microporous ceramic water filter element designed for this purpose, wherein the water filter element is made from the following raw materials in parts by weight: 33-50 parts diatomaceous earth, 22-32 parts clay, 12-22 parts light calcium carbonate, 8-18 parts aluminum hydroxide, additives, and water.

[0006] The additives include, but are not limited to, surfactants, suspending agents, or water-reducing agents.

[0007] The preparation method includes the following steps: Step 1: Select and mix the raw materials, then divide them into several portions and add them one by one into a ball mill to grind them into a slurry with a certain particle size ratio. Step 2: After screening, the slurry is placed in a slurry tank and intermittently stirred at room temperature, followed by aging for a certain period of time. Step 3: The screened and aged slurry is machine-formed and dried or manually formed and dried to produce filter cartridge blanks; Step 4: Perform visual inspection and repair on the filter element blanks, and then load them into the kiln car; Step 5: Set the kiln temperature and heating curve according to the firing curve of the filter element blank to fire the filter element blank. Step 6: Polish the fired filter blank to meet the appearance and size requirements; Step 7: The polished product is then soaked, rinsed, and dried to produce the final water filter cartridge.

[0008] The subsequent processing in step seven includes the following operations: Step 1: Add pure water and HCl to the soaking container with a water outlet valve at the bottom, and stir the pure water and HCl evenly. The weight of HCl added should be 5-6% of the product weight. Step 2: Immerse the product with its opening facing upwards into the soaking container, pour acid solution into the soaking container, and then seal the top opening of the soaking container with the lid. Step 3: After the product has been soaking in the soaking container for 5 days and nights, open the drain valve to drain all the liquid from the soaking container. Step 4: Fill the product with pure water, and then let the pure water drain completely from the outlet valve. Step 5: Close the water outlet valve, then add pure water to the soaking container and allow the pure water to completely submerge the product; Step 6: After 12 hours, open the drain valve to drain all the liquid from the soaking container; Operation 7, repeat operations 4 and 5; Operation 8: After 5 days and nights, fill the product with pure water at 95-100℃, and then let the pure water drain completely from the outlet valve. Then fill it with pure water at 95-100℃ again, and then let the pure water drain completely from the outlet valve again. Step 9: Remove the product from the soaking container, rinse the surface of the product with pure water, dry the washed product, and finally package it to produce a water purification filter element.

[0009] In step one, the slurry with the specified particle size ratio is screened through a 100-mesh sieve.

[0010] In step two, the aging process takes 1 to 2 days.

[0011] In step three, the machine forming and drying process is as follows: the forming mold is placed in the grouting machine, and the grouting time, forming time, and grout discharge time of the grouting machine are set so that the grout is pumped into the forming mold after entering the grouting machine, and the grouting and forming of the grout is completed. After the grout is formed, it is placed in the drying room together with the forming mold so that some of the moisture on the grout on the forming mold is dried off first. Then, the grout with some moisture dried off is removed from the forming mold, and the demolded grout is put back into the drying room for drying.

[0012] In step three, the manual molding and drying process is as follows: the slurry is poured directly into the slurry mold by hand. After the slurry in the mold reaches the required thickness, the slurry is poured out. The slurry mold is then placed on a tray, and the slurry mold and the tray are placed together in the drying room for drying.

[0013] The drying room is a chain drying room, and the requirement for drying the slurry is that the moisture content is less than 5%.

[0014] In step five, the kiln is a tunnel kiln or a pusher kiln, with a set temperature of 1200℃ and a heating curve of 24-34 hours after the filter element blank leaves the kiln.

[0015] This invention, through structural improvements, uses inorganic food-grade materials such as diatomaceous earth, clay, light calcium carbonate, aluminum hydroxide, additives, and water as raw materials. After a series of processes including grinding, sieving, aging, molding, drying, high-temperature firing, polishing, soaking, rinsing, and re-drying, a water purification filter element with high filtration accuracy, long service life, convenient cleaning and regeneration, no secondary pollution, and fast filtration speed can be produced. The produced water purification filter element meets the national drinking water treatment equipment standards in all aspects. At the same time, the preparation method is simple to operate and the finished product qualification rate is high. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described in detail below. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] The preparation method of this microporous ceramic water filter element involves using the following raw materials in parts by weight: 33-50 parts diatomaceous earth, 22-32 parts clay, 12-22 parts light calcium carbonate, 8-18 parts aluminum hydroxide, additives, and water.

[0019] Additives include, but are not limited to, surfactants, suspending agents, or water-reducing agents.

[0020] The diatomaceous earth, clay, light calcium carbonate, aluminum hydroxide, surfactants, suspending agents, or water-reducing agents mentioned above have all been carefully selected by the production site and processing plant to ensure that the raw materials of the water purification filter element are free from pure contamination.

[0021] The preparation method includes the following steps: Step 1: Select and mix the raw materials, then divide them into several portions and add them one by one into a ball mill to grind them into a slurry with a certain particle size ratio. Step 2: After screening, the slurry is placed in a slurry tank and intermittently stirred at room temperature, followed by aging for a certain period of time. Step 3: The screened and aged slurry is machine-formed and dried or manually formed and dried to produce filter cartridge blanks; Step 4: Perform visual inspection and repair on the filter element blanks, and then load them into the kiln car; Step 5: Set the kiln temperature and heating curve according to the firing curve of the filter element blank to fire the filter element blank. Step 6: Polish the fired filter blank to meet the appearance and size requirements; Step 7: The polished product is then soaked, rinsed, and dried to produce the final water filter cartridge.

[0022] The follow-up processing in step seven includes the following operations: Step 1: Add pure water and HCl to the soaking container with a water outlet valve at the bottom, and stir the pure water and HCl evenly. The weight of HCl added should be 5-6% of the product weight. Step 2: Immerse the product with its opening facing upwards into the soaking container, pour acid solution into the soaking container, and then seal the top opening of the soaking container with the lid. Step 3: After the product has been soaking in the soaking container for 5 days and nights, open the drain valve to drain all the liquid from the soaking container. Step 4: Fill the product with pure water, and then let the pure water drain completely from the outlet valve. Step 5: Close the water outlet valve, then add pure water to the soaking container and allow the pure water to completely submerge the product; Step 6: After 12 hours, open the drain valve to drain all the liquid from the soaking container; Operation 7, repeat operations 4 and 5; Operation 8: After 5 days and nights, fill the product with pure water at 95-100℃, and then let the pure water drain completely from the outlet valve. Then fill it with pure water at 95-100℃ again, and then let the pure water drain completely from the outlet valve again. Step 9: Remove the product from the soaking container, rinse the surface of the product with pure water, dry the washed product, and finally package it to produce a water purification filter element.

[0023] In step one, the slurry with a particle size ratio is screened through a 100-mesh sieve to ensure that the produced water purification filter cartridge has micropores.

[0024] In step two, the aging process takes 1 to 2 days to allow the raw materials to mix thoroughly and obtain the desired slurry.

[0025] In step three, the machine forming and drying process is as follows: The forming mold is placed in the grouting machine, and the grouting time, forming time, and grout discharge time of the grouting machine are set so that the grout is drawn into the grouting machine and injected into the forming mold, thus completing the grouting and forming process. After the grout is formed, it is placed in the drying room together with the forming mold, so that some of the moisture in the grout on the forming mold is dried off first. Then, the grout with some moisture removed is removed from the forming mold, and the demolded grout is put back into the drying room for further drying.

[0026] In step three, the manual molding and drying process is as follows: Pour the slurry directly into the slurry mold by hand. After the slurry in the mold reaches the required thickness, pour it out. Then place the slurry mold on a tray and place the mold and tray together in the drying room for drying.

[0027] The molding and drying of the slurry can be done by machine or by manual labor, making it highly versatile in production.

[0028] The drying room is a chain drying room, and the requirement for drying the slurry is that the moisture content is less than 5%.

[0029] In step five, the kiln is a tunnel kiln or a pusher kiln, with a set temperature of 1200℃ and a heating curve of 24-34 hours after the filter element blanks are removed from the kiln.

[0030] The above describes the preferred embodiments of the present invention, illustrating and describing the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. A method for preparing a microporous ceramic water purification filter element, characterized in that: The water purifier filter cartridge is made from the following raw materials in parts by weight: 33-50 parts diatomaceous earth, 22-32 parts clay, 12-22 parts light calcium carbonate, 8-18 parts aluminum hydroxide, additives, and water.

2. The method for preparing the microporous ceramic water filter element according to claim 1, characterized in that: The additives include, but are not limited to, surfactants, suspending agents, or water-reducing agents.

3. The method for preparing the microporous ceramic water filter element according to claim 2, characterized in that: The preparation method includes the following steps: Step 1: Select and mix the raw materials, then divide them into several portions and add them one by one into a ball mill to grind them into a slurry with a certain particle size ratio. Step 2: After screening, the slurry is placed in a slurry tank and intermittently stirred at room temperature, followed by aging for a certain period of time. Step 3: The screened and aged slurry is machine-formed and dried or manually formed and dried to produce filter cartridge blanks. Step 4: Perform visual inspection and repair on the filter element blanks, and then load them into the kiln car; Step 5: Set the kiln temperature and heating curve according to the firing curve of the filter element blank to fire the filter element blank. Step 6: Polish the fired filter blank to meet the appearance and size requirements; Step 7: The polished product is then soaked, rinsed, and dried to produce the final water filter cartridge.

4. The method for preparing the microporous ceramic water purification filter element according to claim 3, characterized in that: The subsequent processing in step seven includes the following operations: Step 1: Add pure water and HCl to the soaking container with a water outlet valve at the bottom, and stir the pure water and HCl evenly. The weight of HCl added should be 5-6% of the product weight. Step 2: Immerse the product with its opening facing upwards into the soaking container, pour acid solution into the soaking container, and then seal the top opening of the soaking container with the lid. Step 3: After the product has been soaking in the soaking container for 5 days and nights, open the drain valve to drain all the liquid from the soaking container. Step 4: Fill the product with pure water, and then let the pure water drain completely from the outlet valve. Step 5: Close the water outlet valve, then add pure water to the soaking container and allow the pure water to completely submerge the product; Step 6: After 12 hours, open the drain valve to drain all the liquid from the soaking container; Operation 7, repeat operations 4 and 5; Operation 8: After 5 days and nights, fill the product with pure water at 95-100℃, and then let the pure water drain completely from the outlet valve. Then fill it with pure water at 95-100℃ again, and then let the pure water drain completely from the outlet valve again. Step 9: Remove the product from the soaking container, rinse the surface of the product with pure water, dry the washed product, and finally package it to produce a water purification filter element.

5. The method for preparing the microporous ceramic water filter element according to claim 3, characterized in that: In step one, the slurry with the specified particle size ratio is screened through a 100-mesh sieve.

6. The method for preparing the microporous ceramic water filter element according to claim 3, characterized in that: In step two, the aging process takes 1 to 2 days.

7. The method for preparing the microporous ceramic water purification filter element according to claim 3, characterized in that: In step three; The machine molding and drying process is as follows: The molding mold is placed in the grouting machine, and the grouting time, molding time, and grout discharge time of the grouting machine are set so that the grout is pumped into the molding mold after being drawn into the grouting machine, and the grouting molding is completed. After the grout is formed, it is placed in the drying room together with the molding mold so that some of the moisture on the grout on the molding mold is dried off first. Then, the grout with some moisture dried off is removed from the molding mold, and the demolded grout is put back into the drying room for drying. Manual molding and drying are as follows: Pour the slurry directly into the slurry mold by hand. After the slurry in the mold reaches the required thickness, pour it out. Then place the slurry mold on a tray and place the mold and tray together in the drying room for drying.

8. The method for preparing the microporous ceramic water filter element according to claim 7, characterized in that: The drying room is a chain drying room, and the requirement for drying the slurry is that the moisture content is less than 5%.

9. The method for preparing the microporous ceramic water filter element according to claim 3, characterized in that: In step five, the kiln is a tunnel kiln or a pusher kiln, with a set temperature of 1200℃ and a heating curve of 24-34 hours after the filter element blank leaves the kiln.