Preparation method of AFM-S active silicon filter material

Abstract

The invention relates to the technical field of water treatment filter materials, and discloses an AFM-S active silicon filter material preparation method, which comprises: S1, recovering waste glass; s2, screening glass; s3, crushing the glass; s4, screening is carried out; s5, cleaning; s6, sintering is conducted; s7, acidizing treatment; s8, activating treatment; s9, alkaline cleaning; s10, final cleaning is conducted; and S11, drying treatment is conducted. A crawler-type photoelectric glass color selector is adopted to screen out green and brown glass as base materials. The AFM-S active silicon filter material is made of specific glass, the specific glass is treated to achieve the optimal particle size and shape, then chemical activation treatment is conducted, the surface area of the AFM-S active silicon filter material is endowed with permanent negative charges (zeta potential), organic matter and small particles can be attracted through static electricity, the filtering precision is as high as 1 micrometer, and the specific hydrophilic and oleophobic surface of the AFM-S active silicon filter material can be used for filtering water. Due to the characteristic, a biological membrane cannot be produced on a filter bed, and due to the characteristic, a filter system can be healthier, more ecological and more economical.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment filter materials, in particular to a method for preparing AFM-S active silicon filter material. Background Art

[0002] In the current water treatment industry, water compositions are often complex, and filtration often requires handling high-concentration and high-viscosity pollutants, particulate pollutants of varying specific gravities, and oils. Currently, the mainstream filtration medium is quartz sand.

[0003] While quartz sand filter media plays an important role in water treatment, its inherent shortcomings and regulatory restrictions cannot be ignored. With tightening environmental regulations and the promotion of new filter media, the application of quartz sand filter media may face more challenges. In the future, technological innovation is needed to develop high-performance, low-cost filter media to promote the water treatment industry towards more environmentally friendly and efficient development.

[0004] To this end, we proposed an AFM-S active silicon filter material preparation method to solve the problem. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a method for preparing AFM-S active silicon filter material, which solves the problems in the above-mentioned background technology.

[0007] (2) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: A method for preparing AFM-S active silicon filter material, comprising the following steps:

[0009] S1: Recycling of waste glass;

[0010] S2: screening glass;

[0011] S3: smashed glass;

[0012] S4: Screening;

[0013] S5: cleaning;

[0014] S6: sintering;

[0015] S7: acidification treatment;

[0016] S8: activation treatment;

[0017] S9: alkaline cleaning;

[0018] S10: Final cleaning;

[0019] S11: Drying treatment.

[0020] Preferably, a crawler-type photoelectric glass color sorter is used to screen out green and brown glass as the base material.

[0021] Preferably, the qualified glass raw materials after color sorting are fed into a vertical multi-stage crusher by a conveyor belt, and the crusher outlet particle size option is adjusted to crush irregular particles of 0.25-8 mm.

[0022] Preferably, the glass particles are transported to an automatic vibrating multi-layer screening machine for glass particles, and the particles are screened out into five specifications with particle sizes of 0.25-0.5 mm, 0.4-0.8 mm, 0.7-2.0 mm, 2.0-4.0 mm, and 4.0-8.0 mm, which are stored separately, and the remaining waste is disposed of as waste.

[0023] Preferably, the granular glass particles are moved into a cleaning device and backwashed with pure water to remove fine dust and impurities. The turbidity index of the backwash water is detected to determine whether the cleaning is thorough. Generally, the backwash time is required to be 10-15 minutes, and the backwash flow rate is required to make the glass particles expand by 20-40%.

[0024] Preferably, the cleaned glass particles are transported into a glass sintering furnace, and the temperature is evenly raised to 550°C and kept constant for 15 minutes to burn off organic matter and other impurities attached to the glass surface. At the same time, the glass is brought close to a softened state and internal stress is eliminated through its own deformation. The glass is then removed from the sintering furnace and high-pressure cold air is blown onto the glass using a multi-head nozzle to quickly and evenly cool it to room temperature and remove its sharp edges.

[0025] Preferably, the sintered particles are subjected to an acid treatment to etch their surface to obtain an irregular large specific surface area.

[0026] Preferably, surface activation treatment is performed on the acidified particles using surface empowerment technology, giving them a permanent negative charge and a hydrophilic and oleophobic surface, so that they have electrostatic adsorption function, biological resistance and self-disinfection properties, and prevent the formation of biofilm on the surface of the filter material, thereby ensuring that they do not become compacted, do not produce wormholes, and their performance does not decay.

[0027] Preferably, the glass particles are moved into a cleaning device and backwashed with pure water. The backwash flow rate causes the glass particles to expand by 20-40%. The pH value of the backwash water is tested to determine whether the cleaning is thorough. Generally, the pH value of the rinse water is required to be close to 7.

[0028] Preferably, the cleaned glass particles are taken out from the cleaning device and placed in an oven at a temperature controlled at 80-120 degrees Celsius until the glass particles are completely dry, ensuring that there is no moisture remaining in the dried glass particles for subsequent storage and use.

[0029] (3) Beneficial effects

[0030] Compared with the prior art, the present invention provides a method for preparing AFM-S active silicon filter material, which has the following beneficial effects:

[0031] The AFM-S active silica filter material of the present invention is made of specific glass, which is processed to achieve the optimal particle size and shape, and then chemically activated. Its surface area is given a permanent negative charge (zeta potential), and it can attract organic matter and small particles by electrostatics. The filtration accuracy is as high as 1 micron. Its specific hydrophilic and oleophobic surface makes it biologically resistant and self-disinfecting. This property prevents the formation of biofilm on the filter bed. This feature can make the filtration system healthier, more ecological and economical. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] The preparation method of AFM-S active silicon filter material comprises the following steps:

[0034] S1: Recycling of waste glass;

[0035] S2: Screening glass, using a crawler-type photoelectric glass color sorter to screen out green and brown glass as basic materials;

[0036] S3: crushing glass. After color sorting, qualified glass raw materials are sent to the vertical multi-stage crusher by conveyor belt. The crusher outlet particle size option is adjusted to crush irregular particles of 0.25-8mm;

[0037] S4: Screening: The glass particles are transported to the glass particle automatic vibration multi-layer screening machine to screen out the five specifications of particle size: 0.25-0.5mm, 0.4-0.8mm, 0.7-2.0mm, 2.0-4.0mm, and 4.0-8.0mm, and stored separately. The remaining waste is disposed of as waste;

[0038] S5: Cleaning: Move the granular glass particles into the cleaning device and use pure water to backwash the glass particles to remove fine dust and impurities. The turbidity index of the backwash water is tested to determine whether the cleaning is thorough. Generally, the backwash time is required to be 10-15 minutes, and the backwash flow rate is required to make the glass particles expand by 20-40%;

[0039] S6: Sintering: The cleaned glass particles are transported into the glass sintering furnace, and the temperature is evenly raised to 550℃ and kept constant for 15 minutes to burn off the organic matter and other impurities attached to the glass surface. At the same time, the glass is softened and its internal stress is eliminated through its own deformation. The glass is then removed from the sintering furnace and high-pressure cold air is blown to the glass through a multi-head nozzle to quickly and evenly cool it to room temperature and remove its sharp edges.

[0040] S7: Acidification treatment is performed on the sintered particles to etch their surface to obtain an irregular and large specific surface area. The specific steps are:

[0041] a) Choose a corrosion-resistant reaction vessel with a stirring device, such as a plastic or glass-lined reactor, to ensure that it can withstand acid and alkaline environments and that the filter media can fully contact the cleaning agent during the cleaning process;

[0042] b) loading the sintered particles into a reactor;

[0043] c) Dilute 40% hydrofluoric acid (HF) with water in a ratio of 1:3. Slowly add the diluted HF solution to the reactor containing the glass particles, ensuring that the glass particles are completely immersed in the solution.

[0044] d) Turn on the stirring device and stir the solution at an appropriate speed (10-20 rpm) to ensure that the glass particles and the hydrofluoric acid solution are fully in contact and react. The reaction time is generally 5-10 minutes.

[0045] e) After the reaction is completed, stop stirring and drain the hydrofluoric acid solution through the drain port at the bottom into a special collection container to wait for the next batch to be used again;

[0046] S8: Activation treatment, using surface energization technology, the acidified particles are activated to give them a permanent negative charge and a hydrophilic and oleophobic surface, which makes them have electrostatic adsorption function, biological resistance and self-disinfection properties, and prevents the formation of biofilm on the surface of the filter material, thereby ensuring that it does not compact, does not produce wormholes, and does not degrade in performance. Specifically:

[0047] a) Prepare a dilute solution of silane coupling agent with a concentration of 0.5-1%, add acetic acid as a hydrolysis catalyst, and adjust the pH value to 3.5-5.5;

[0048] b) Add sodium ethoxide and stir to prepare a 2-3% solution;

[0049] c) adding a mixture of the polysilazane nano-lipophilic and hydrophobic coating and the above solution in a ratio of 1:1 and placing the mixture into a reactor;

[0050] d) The glass particles are spread on the screen, and the sol is evenly coated on the surface of the glass particles by spraying;

[0051] f) Place the sprayed glass particles in an oven, control the temperature at 80-20 degrees Celsius, and bake for 15-30 minutes.

[0052] g) taking the glass particles out of the oven and allowing them to cool naturally to room temperature;

[0053] S9: Alkaline cleaning: Alkaline cleaning of glass particles. The steps and methods are as follows:

[0054] 1. Rinse and neutralize: Rinse the glass particles with pure water until the pH of the rinse solution is close to neutral. The pH value of the rinse solution can be tested with pH test paper or a pH meter.

[0055] 2. Add alkaline cleaning agent: Add the prepared alkaline (sodium carbonate or sodium bicarbonate) cleaning agent solution into the cleaning equipment in a similar way to the acidification treatment to ensure that the glass particles are completely immersed;

[0056] 3. Stirring and reacting: Turn on the stirring device and react at an appropriate speed (10-20 rpm). The reaction time is adjusted according to the actual situation, generally 15-30 minutes.

[0057] 4. Discharge alkaline waste liquid: After the reaction is completed, stop stirring, discharge the alkaline waste liquid into a special waste liquid collection container, and properly dispose of the waste liquid;

[0058] S10: Final cleaning: Move the glass particles into the cleaning device and backwash them with pure water. The backwash flow rate causes the glass particles to expand by 20-40%. The pH value of the backwash water is tested to determine whether the cleaning is thorough. Generally, the pH value of the rinse water is required to be close to 7.

[0059] S11: Drying treatment: take the cleaned glass particles out of the cleaning equipment and put them into an oven with the temperature controlled at 80-120 degrees Celsius until the glass particles are completely dry. Ensure that there is no moisture left in the dried glass particles for subsequent storage and use.

[0060] In summary, the use of recycled glass as water treatment filter material has brought significant social benefits in terms of environmental protection, economic benefits, resource conservation, water quality improvement, social awareness, technological innovation and waste treatment, and has promoted sustainable development.

[0061] (1) Environmental protection: Recycling glass as filter material reduces the landfill and incineration of glass waste, reduces environmental pollution, and at the same time reduces the mining of new raw materials, protects natural resources, and reduces damage to the ecological environment.

[0062] (2) Economic benefits: The cost of recycling glass filter materials is low, which can reduce the construction and operation costs of water treatment facilities. Glass recycling and reuse brings economic benefits to related industries and promotes the development of a circular economy.

[0063] (3) Resource conservation: Recycling glass as filter material extends its service life and reduces the demand for new resources; converting waste glass into useful water treatment materials improves resource utilization efficiency.

[0064] (4) Improve water quality: Glass filter material has good filtering performance and can effectively remove suspended matter and impurities in water, improving water quality. At the same time, the chemical properties of glass filter material are stable and will not cause secondary pollution to water quality.

[0065] (5) Enhancement of social awareness: Using recycled glass as filter material helps to enhance the public's environmental awareness and promote the development of society in a green, low-carbon and sustainable direction.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. AFM-S active silicon filter material preparation method, characterized in that: The following steps are involved: S1: Recycling of waste glass; S2: screening glass; S3: smashed glass; S4: Screening; S5: cleaning; S6: sintering; S7: acidification treatment; S8: activation treatment; S9: alkaline cleaning; S10: Final cleaning; S11: Drying treatment.

2. The method for preparing the AFM-S active silicon filter material according to claim 1, wherein: A crawler-type photoelectric glass color sorter is used to screen out green and brown glass as basic materials.

3. The method for preparing the AFM-S active silicon filter material according to claim 1, wherein: The qualified glass raw materials after color sorting are sent to the vertical multi-stage crusher by a conveyor belt. The crusher outlet particle size option is adjusted to crush irregular particles of 0.25-8mm.

4. The method for preparing the AFM-S active silicon filter material according to claim 1, wherein: The glass particles are transported to the glass particle automatic vibrating multi-layer screening machine, and five specifications of particle size are screened out: 0.25-0.5mm, 0.4-0.8mm, 0.7-2.0mm, 2.0-4.0mm, and 4.0-8.0mm, and stored separately. The remaining waste is disposed of as waste.

5. The method for preparing the AFM-S active silicon filter material according to claim 1, wherein: The granular glass particles are moved into the cleaning device and backwashed with pure water to remove fine dust and impurities. The turbidity index of the backwash water is tested to determine whether the cleaning is thorough. The backwash time is generally required to be 10-15 minutes, and the backwash flow rate is such that the glass particles expand by 20-40%.

6. The method for preparing the AFM-S active silicon filter material according to claim 1, characterized in that: The cleaned glass particles are transported into the glass sintering furnace, and the temperature is evenly raised to 550℃ and kept constant for 15 minutes to burn off the organic matter and other impurities attached to the glass surface. At the same time, the glass is brought close to a softened state and internal stress is eliminated through its own deformation. The glass is then removed from the sintering furnace and high-pressure cold air is blown onto the glass through a multi-head nozzle to quickly and evenly cool it to room temperature and remove its sharp edges.

7. The method for preparing the AFM-S active silicon filter material according to claim 1, wherein: The sintered particles are acidified to etch their surfaces to obtain an irregular and large specific surface area.

8. The method for preparing the AFM-S active silicon filter material according to claim 1, wherein: Surface empowerment technology is used to activate the surface of the acidified particles, giving them a permanent negative charge and a hydrophilic and oleophobic surface, so that they have electrostatic adsorption function, biological resistance and self-disinfection properties, eliminating the formation of biofilm on the surface of the filter material, thereby ensuring that it does not become compacted, does not produce wormholes, and does not degrade in performance.

9. The method for preparing the AFM-S active silicon filter material according to claim 1, characterized in that: Move the glass particles into the cleaning device and use pure water to backwash the glass particles. The backwash flow rate makes the glass particles expand by 20-40%. By testing the pH index of the backwash water, it is judged whether the cleaning is thorough. Generally, the pH value of the flushing liquid is required to be close to 7.

10. The method for preparing the AFM-S active silicon filter material according to claim 1, characterized in that: The cleaned glass particles are taken out of the cleaning equipment and placed in an oven with the temperature controlled at 80-120 degrees Celsius until the glass particles are completely dry. Ensure that there is no moisture residue in the dried glass particles for subsequent storage and use.